| Compare | Image | Name | Manufacturer | Pricing(USD) | Quantity | Weight(Kg) | Size(LxWxH) | Part Status | Type | Series | Mount | Mounting Type | Operating Temperature | Packaging | Moisture Sensitivity Level (MSL) | Termination | Voltage - Rated | RoHS Status | Published | Datasheet | Current Rating | Length | Color | Depth | Factory Lead Time | Ratings | REACH SVHC | Pbfree Code | Connector Type | Number of Positions | Gender | MIL Conformance | DIN Conformance | IEC Conformance | Filter Feature | Mixed Contacts | Option | Number of Contacts | Mating Information | Contact Gender | Empty Shell | Backshell Type | Coupling Type | Housing Color | Contact Finish - Mating | Orientation | ECCN Code | Additional Feature | Contact Material | Contact Plating | Housing Material | Total Number of Contacts | Radiation Hardening | Reach Compliance Code | Body/Shell Style | Ingress Protection | HTS Code | JESD-609 Code | Feature | Mounting Feature | Military Standard | Shielding | Body Material | Termination Type | Body Plating | Shell Material | Plating | Contact Style | Shell Finish | Environmental Characteristics | Fastening Type | Shell Size | Contact Shape | Contact Type | Shell Size - Insert | Insert Material | Shell Size, MIL | Contact Size | Note |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 8D515F19SN-LC | SOURIAU-SUNBANK |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | For Female Sockets | MIL-DTL-38999 Series III, 8D | Free Hanging (In-Line) | -65°C~200°C | Bulk | Not Applicable | ROHS3 Compliant | https://pdf.utmel.com/r/datasheets/souriausunbank-8d515f19snlc-datasheets-2472.pdf | 12 Weeks | Plug Housing | 19 | Silver | N (Normal) | IP67 - Dust Tight, Waterproof | Coupling Nut | Shielded | Aluminum | Nickel | Threaded | Circular | Crimp | 15-19 | Thermoplastic | 20 | Contacts Not Included | |||||||||||||||||||||||||||||||||||||||||||||||||
| D38999/26FD19BN | SOURIAU-SUNBANK |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | CABLE | Crimp | 1.8kV | ROHS3 Compliant | https://pdf.utmel.com/r/datasheets/souriau-d3899926fd19bn-datasheets-9177.pdf | 7.5A | 12 Weeks | IP67 | yes | MIL SERIES CONNECTOR | 19 | YES | NO | NO | NO | NO | GENERAL PURPOSE | MULTIPLE MATING PARTS AVAILABLE | FEMALE | YES | SOLID | THREADED | NOT SPECIFIED | Gold | 19 | PLUG | MIL-DTL-38999 | Aluminium | Nickel | FLUID RESISTANT | D | |||||||||||||||||||||||||||||||||||||||||||
| 8D515F35BN | SOURIAU-SUNBANK |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | ROHS3 Compliant | https://pdf.utmel.com/r/datasheets/souriausunbank-8d515f35bn-datasheets-2410.pdf | 12 Weeks | MIL SERIES CONNECTOR | EAR99 | not_compliant | 8536.69.40.20 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| D38999/20FG41BN | Amphenol Aerospace Operations | $27.97 |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | For Female Sockets | Military, MIL-DTL-38999 Series III, Tri-Start™ TV | Panel Mount | -65°C~200°C | Bulk | 1 (Unlimited) | ROHS3 Compliant | 2004 | https://pdf.utmel.com/r/datasheets/amphenolaerospaceoperations-d3899924wa35sn-datasheets-5675.pdf | 32.77mm | 40.1mm | 12 Weeks | no | Receptacle Housing | 41 | Female | YES | NO | NO | NO | YES | Silver | N (Normal) | NOT SPECIFIED | Gold | 41 | Environment Resistant | e4 | Flange | Shielded | Aluminum | Electroless Nickel | Electroless Nickel | CORROSION/ENVIRONMENT/MOISTURE/VIBRATION RESISTANT | Threaded | Circular | Crimp | 21-41 | G | 20 | Contacts Not Included | ||||||||||||||||||||||||||||||||
| D38999/26WD19BN | SOURIAU-SUNBANK | $41.72 |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | CABLE | Non-RoHS Compliant | https://pdf.utmel.com/r/datasheets/souriau-d3899926wd19bn-datasheets-9135.pdf | 12 Weeks | no | MIL SERIES CONNECTOR | 19 | YES | NO | NO | NO | NO | GENERAL PURPOSE | MULTIPLE MATING PARTS AVAILABLE | FEMALE | YES | SOLID | THREADED | NOT SPECIFIED | NOT SPECIFIED | Gold | 19 | unknown | PLUG | MIL-DTL-38999 | CRIMP | Aluminium | Cadmium | FLUID RESISTANT | D | |||||||||||||||||||||||||||||||||||||||||||
| CA3106F16-10PYF80F0 | ITT Cannon, LLC | $51.74 |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | For Male Pins | MIL-DTL-5015, CA | Free Hanging | Free Hanging (In-Line) | -55°C~125°C | Bulk | Non-RoHS Compliant | 2006 | https://pdf.utmel.com/r/datasheets/ittcannonllc-ca3101r2015s-datasheets-5059.pdf | 12 Weeks | Dust Tight, IP65, Water Resistant | No SVHC | Plug Housing | 3 | Male | YES | NO | NO | NO | GENERAL PURPOSE | YES | Olive Drab | Y | STANDARD: MIL-C-5015 | Silver | 3 | Environment Resistant | Backshell, Cable Clamp, Coupling Nut | Unshielded | Aluminium | Cadmium | Aluminum Alloy | Pin | Chromate over Cadmium | CORROSION RESISTANT | Threaded | Circular | Crimp | 16-10 | Polychloroprene | 12 | Contacts Not Included | |||||||||||||||||||||||||||||||
| CA3108E20-27SF80F0F97A206 | ITT Cannon, LLC | $38.82 |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | RoHS Compliant | 12 Weeks | Plug | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KPSE02E14-12SA206F0 | ITT Cannon, LLC | $33.26 |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | For Female Sockets | KPSE | Panel Mount | -55°C~125°C | Bulk | RoHS Compliant | 2002 | https://pdf.utmel.com/r/datasheets/ittcannonllc-kpse06f106p-datasheets-4958.pdf | 12 Weeks | Receptacle Housing | 12 | Black | N (Normal) | Environment Resistant | Flange | Unshielded | Aluminum Alloy | Zinc Cobalt | Bayonet Lock | Circular | Crimp | 14-12 | Polychloroprene | 16 4 20 8 | Contacts Not Included | ||||||||||||||||||||||||||||||||||||||||||||||||
| D38999/26WD18BN | SOURIAU-SUNBANK | $40.38 |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | CABLE | Non-RoHS Compliant | https://pdf.utmel.com/r/datasheets/souriau-d3899926wd18bn-datasheets-9141.pdf | 12 Weeks | no | MIL SERIES CONNECTOR | YES | NO | NO | NO | NO | GENERAL PURPOSE | MULTIPLE MATING PARTS AVAILABLE | FEMALE | YES | SOLID | THREADED | NOT SPECIFIED | STANDARD: MIL-DTL-38999, POLARIZED, RFI SHIELDED, COMPATIBLE CONTACT: M39029/56351 | NOT SPECIFIED | Gold | 18 | not_compliant | PLUG | CRIMP | ALUMINUM ALLOY | CADMIUM PLATED | FLUID RESISTANT | D | ||||||||||||||||||||||||||||||||||||||||||||
| D38999/26FC4SA-LC | Amphenol Aerospace Operations |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | For Female Sockets | Military, MIL-DTL-38999 Series III, Tri-Start™ TV | Free Hanging (In-Line) | -65°C~200°C | Bulk | 1 (Unlimited) | ROHS3 Compliant | 2006 | https://pdf.utmel.com/r/datasheets/amphenolaerospaceoperations-d3899924wa35sn-datasheets-5675.pdf | 13A | 31.34mm | 12 Weeks | No SVHC | Plug Housing | 4 | Male | YES | NO | NO | NO | Female | YES | Silver | A | Gold | 4 | unknown | Environment Resistant | e4 | Coupling Nut, Self Locking | MIL-DTL-38999 | Shielded | Aluminium | Electroless Nickel | Aluminum | Electroless Nickel | Electroless Nickel | Threaded | Circular | Crimp | 13-4 | C | 16 | Contacts Not Included | ||||||||||||||||||||||||||||||
| DTS24F13-8AA | TE Connectivity Deutsch Connectors |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | For Male Pins | MIL-DTL-38999 Series III, DTS | Bulkhead, Front Side Nut, Panel | Panel Mount | -65°C~200°C | Bulk | 1 (Unlimited) | Non-RoHS Compliant | 2007 | https://pdf.utmel.com/r/datasheets/teconnectivitydeutschconnectors-d3899926fc35sn-datasheets-5785.pdf | 12 Weeks | Environment Resistant | Unknown | Receptacle Housing | 8 | Receptacle | 8 | Silver | A | Gold | Environment Resistant | Shielded | Bulkhead - Front Side Nut | Shielded | Aluminium | Electroless Nickel | Aluminum Alloy | Electroless Nickel | Threaded | Circular | Crimp | 13-8 | Plastic | 20 | Contacts Not Included | |||||||||||||||||||||||||||||||||||||||
| D38999/26FD35BN | SOURIAU-SUNBANK | $50.05 |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | CABLE | Crimp | ROHS3 Compliant | https://pdf.utmel.com/r/datasheets/souriau-d3899926fd35bn-datasheets-9146.pdf | 5A | 12 Weeks | yes | MIL SERIES CONNECTOR | 37 | YES | NO | NO | NO | NO | GENERAL PURPOSE | MULTIPLE MATING PARTS AVAILABLE | FEMALE | YES | SOLID | THREADED | NOT SPECIFIED | Gold | 37 | PLUG | MIL-DTL-38999 | Aluminium | Nickel | FLUID RESISTANT | D | ||||||||||||||||||||||||||||||||||||||||||||
| D38999/26FB99SA-LC | Amphenol Aerospace Operations |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | For Female Sockets | Military, MIL-DTL-38999 Series III, Tri-Start™ TV | Free Hanging (In-Line) | -65°C~200°C | Bulk | 1 (Unlimited) | ROHS3 Compliant | 2006 | https://pdf.utmel.com/r/datasheets/amphenolaerospaceoperations-d3899924wa35sn-datasheets-5675.pdf | 12 Weeks | No SVHC | Plug Housing | 7 | Male | YES | NO | NO | NO | Female | YES | Silver | A | NOT SPECIFIED | Gold | 7 | unknown | Environment Resistant | e4 | Coupling Nut, Self Locking | MIL-DTL-38999 | Shielded | Aluminium | Electroless Nickel | Aluminum | Electroless Nickel | Electroless Nickel | Threaded | Circular | Crimp | 11-99 | B | 20 | Contacts Not Included | |||||||||||||||||||||||||||||||
| 8D515W18SN-LC | SOURIAU-SUNBANK |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | For Female Sockets | MIL-DTL-38999 Series III, 8D | Free Hanging (In-Line) | -65°C~175°C | Bulk | Not Applicable | Non-RoHS Compliant | https://pdf.utmel.com/r/datasheets/souriausunbank-8d515w18snlc-datasheets-2403.pdf | 12 Weeks | Plug Housing | 18 | Olive Drab | N (Normal) | Gold | IP67 - Dust Tight, Waterproof | Coupling Nut | Shielded | Aluminum | Cadmium | Threaded | Circular | Crimp | 15-18 | Thermoplastic | 20 | Contacts Not Included | ||||||||||||||||||||||||||||||||||||||||||||||||
| CA08COME14S5SBF044 | ITT Cannon, LLC |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | For Female Sockets | MIL-DTL-5015, CA-COM-B | Free Hanging | Free Hanging (In-Line), Right Angle | -55°C~125°C | Bulk | Non-RoHS Compliant | 2006 | https://pdf.utmel.com/r/datasheets/ittcannonllc-ca06come10sl3p01-datasheets-5053.pdf | 12 Weeks | Dust Tight, IP67, Waterproof | No SVHC | Plug Housing | 5 | Receptacle | Silver | N (Normal) | IP67 - Dust Tight, Waterproof | Coupling Nut | Unshielded | Aluminium | Aluminum Alloy and Zinc Die Cast | Nickel | Reverse Bayonet Lock | Circular | Solder Cup | 14S-5 | Polychloroprene | 16S | Contacts Not Included | ||||||||||||||||||||||||||||||||||||||||||||
| MS27467T17B35B | SOURIAU-SUNBANK | $42.81 |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | Non-RoHS Compliant | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| DTS26F25-24SB-LC | TE Connectivity Deutsch Connectors |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | For Female Sockets | MIL-DTL-38999 Series III, DTS | Free Hanging | Free Hanging (In-Line) | -65°C~200°C | Bulk | 1 (Unlimited) | Non-RoHS Compliant | 2009 | https://pdf.utmel.com/r/datasheets/teconnectivitydeutschconnectors-d3899926fc35sn-datasheets-5785.pdf | 12 Weeks | Environment Resistant | Unknown | Plug Housing | 24 | Female | YES | NO | NO | NO | GENERAL PURPOSE | YES | Silver | B | EAR99 | STANDARD: MIL-C-38999 | Gold | 24 | Environment Resistant | 8536.69.40.20 | e4 | Coupling Nut | Shielded | Aluminium | Electroless Nickel | Aluminum Alloy | Electroless Nickel | CORROSION/FLUID/IMMERSION RESISTANT | Threaded | Circular | Crimp | 25-24 | Plastic | 12 12 16 12 | Contacts Not Included | |||||||||||||||||||||||||||||
| CA06R18-1SF80F0F187 | ITT Cannon, LLC |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | For Female Sockets | MIL-DTL-5015, CA | Free Hanging | Free Hanging (In-Line) | -55°C~125°C | Bulk | Non-RoHS Compliant | 2006 | 12 Weeks | Dust Tight, IP65, Water Resistant | No SVHC | Plug Housing | 10 | Receptacle | Olive Drab | N (Normal) | Silver | Environment Resistant | Backshell, Coupling Nut | Unshielded | Aluminium | Aluminum Alloy | Chromate over Cadmium | Threaded | Circular | Crimp | 18-1 | Neoprene | 16 | Contacts Not Included | ||||||||||||||||||||||||||||||||||||||||||||
| CIR030-28-51P-F80-VO | ITT Cannon, LLC |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | For Male Pins | CIR | Panel Mount | -55°C~125°C | Bulk | Not Applicable | RoHS Compliant | 12 Weeks | Receptacle Housing | 12 | Olive Drab | N (Normal) | Flange | Unshielded | Aluminum Alloy | Chromate over Cadmium | Bayonet Lock | Circular | Crimp | 28-51 | Polychloroprene | Contacts Not Included | ||||||||||||||||||||||||||||||||||||||||||||||||||||
| 8D515W18BN | SOURIAU-SUNBANK |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | Non-RoHS Compliant | https://pdf.utmel.com/r/datasheets/souriausunbank-8d515w18bn-datasheets-2406.pdf | 12 Weeks | MIL SERIES CONNECTOR | EAR99 | Gold | not_compliant | 8536.69.40.20 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| D38999/26FD18SN-LC | SOURIAU-SUNBANK |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | For Female Sockets | MIL-DTL-38999 Series III | Free Hanging (In-Line) | -65°C~200°C | Bulk | Not Applicable | ROHS3 Compliant | https://pdf.utmel.com/r/datasheets/souriau-d3899926fd18snlc-datasheets-9153.pdf | 12 Weeks | Plug Housing | 18 | Silver | N (Normal) | Gold | IP67 - Dust Tight, Waterproof | Coupling Nut | Shielded | Aluminum | Nickel | Threaded | Circular | Crimp | 15-18 | Thermoplastic | D | 20 | Contacts Not Included | |||||||||||||||||||||||||||||||||||||||||||||||
| D38999/26WD35SN-LC | SOURIAU-SUNBANK |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | For Female Sockets | MIL-DTL-38999 Series III | Free Hanging (In-Line) | -65°C~175°C | Bulk | Not Applicable | Non-RoHS Compliant | 12 Weeks | Plug Housing | 37 | Olive Drab | N (Normal) | Gold | IP67 - Dust Tight, Waterproof | Coupling Nut | Shielded | Aluminum | Cadmium | Threaded | Circular | Crimp | 15-35 | Thermoplastic | D | 22D | Contacts Not Included | ||||||||||||||||||||||||||||||||||||||||||||||||
| D38999/26FD18BN | SOURIAU-SUNBANK |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | CABLE | Crimp | ROHS3 Compliant | 7.5A | 12 Weeks | yes | MIL SERIES CONNECTOR | 18 | YES | NO | NO | NO | NO | GENERAL PURPOSE | MULTIPLE MATING PARTS AVAILABLE | FEMALE | YES | SOLID | THREADED | Copper | Gold | 18 | PLUG | MIL-DTL-38999 | Aluminium | Nickel | FLUID RESISTANT | D | ||||||||||||||||||||||||||||||||||||||||||||||
| DTS24F13-8PA-LC | TE Connectivity Deutsch Connectors |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | For Male Pins | MIL-DTL-38999 Series III, DTS | Bulkhead, Front Side Nut, Panel | Panel Mount | -65°C~200°C | Bulk | 1 (Unlimited) | Non-RoHS Compliant | 2008 | https://pdf.utmel.com/r/datasheets/teconnectivitydeutschconnectors-d3899926fc35sn-datasheets-5785.pdf | 12 Weeks | Environment Resistant | Unknown | Receptacle Housing | 8 | Receptacle | 8 | Silver | A | Gold | Environment Resistant | Shielded | Bulkhead - Front Side Nut | Shielded | Aluminium | Electroless Nickel | Aluminum Alloy | Electroless Nickel | Threaded | Circular | Crimp | 13-8 | Plastic | 20 | Contacts Not Included | |||||||||||||||||||||||||||||||||||||||
| D38999/26WD19SN-LC | SOURIAU-SUNBANK |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | For Female Sockets | MIL-DTL-38999 Series III | Free Hanging (In-Line) | -65°C~175°C | Bulk | Not Applicable | Non-RoHS Compliant | 12 Weeks | Plug Housing | 19 | Olive Drab | N (Normal) | Gold | IP67 - Dust Tight, Waterproof | Coupling Nut | Shielded | Aluminum | Cadmium | Threaded | Circular | Crimp | 15-19 | Thermoplastic | D | 20 | Contacts Not Included | ||||||||||||||||||||||||||||||||||||||||||||||||
| 8D515W35BN | SOURIAU-SUNBANK |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | Non-RoHS Compliant | https://pdf.utmel.com/r/datasheets/souriausunbank-8d515w35bn-datasheets-2383.pdf | 12 Weeks | MIL SERIES CONNECTOR | EAR99 | Gold | not_compliant | 8536.69.40.20 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| D38999/24WB98SA-LC | Amphenol Aerospace Operations | $109.38 |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | For Female Sockets | Military, MIL-DTL-38999 Series III, Tri-Start™ TV | Panel Mount | -65°C~175°C | Bulk | 1 (Unlimited) | Non-RoHS Compliant | 2011 | https://pdf.utmel.com/r/datasheets/amphenolaerospaceoperations-d3899924wa35sn-datasheets-5675.pdf | 31.72mm | 31.75mm | 12 Weeks | No SVHC | Receptacle Housing | 6 | Receptacle | YES | NO | NO | NO | Female | YES | Olive Drab | A | Gold | 6 | unknown | Environment Resistant | e4 | Bulkhead - Front Side Nut | MIL-DTL-38999 | Shielded | Aluminium | Aluminum | Cadmium, Chromate | Cadmium | Threaded | Circular | Crimp | 11-98 | B | 20 | Contacts Not Included | ||||||||||||||||||||||||||||||
| D38999/20FB98SN-LC | Amphenol Aerospace Operations | $27.36 |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | For Female Sockets | Military, MIL-DTL-38999 Series III, Tri-Start™ TV | Wall | Panel Mount | -65°C~200°C | Bulk | 1 (Unlimited) | ROHS3 Compliant | 2006 | https://pdf.utmel.com/r/datasheets/amphenolaerospaceoperations-d3899924wa35sn-datasheets-5675.pdf | 7.5A | 32.74mm | 26.5mm | 12 Weeks | No SVHC | Receptacle Housing | 6 | Receptacle | YES | NO | NO | NO | GENERAL PURPOSE | Female | YES | Silver | N (Normal) | EAR99 | Gold | 6 | No | Environment Resistant | e4 | Flange | MIL-DTL-38999 | Shielded | Aluminium | Electroless Nickel | Aluminum | Electroless Nickel | Electroless Nickel | ENVIRONMENT/MOISTURE RESISTANT | Threaded | Circular | Crimp | 11-98 | B | 20 | Contacts Not Included | ||||||||||||||||||||||||
| 8D515W19BN | SOURIAU-SUNBANK |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | Non-RoHS Compliant | https://pdf.utmel.com/r/datasheets/souriausunbank-8d515w19bn-datasheets-2389.pdf | 12 Weeks | MIL SERIES CONNECTOR | EAR99 | Gold | not_compliant | 8536.69.40.20 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| TV06RW-13-98SB-LC | Amphenol Aerospace Operations |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | For Female Sockets | MIL-DTL-38999 Series III, Tri-Start™ TV | Cable | Free Hanging (In-Line) | -65°C~175°C | Bulk | 1 (Unlimited) | Non-RoHS Compliant | 2011 | https://pdf.utmel.com/r/datasheets/amphenolaerospaceoperations-d3899924wa35sn-datasheets-5675.pdf | Green | 12 Weeks | Plug Housing | 10 | Male | YES | NO | NO | NO | GENERAL PURPOSE | YES | Olive Drab | B | Gold | Aluminium | 10 | No | Environment Resistant | Coupling Nut, Self Locking | Shielded | Aluminum | Cadmium | ENVIRONMENT/FLUID/MOISTURE RESISTANT | Threaded | Circular | Crimp | 13-98 | 20 | Contacts Not Included |
Please send RFQ , we will respond immediately.