Compare | Image | Name | Manufacturer | Pricing(USD) | Quantity | Weight(Kg) | Size(LxWxH) | Part Status | Type | Series | Mount | Mounting Type | Operating Temperature | Packaging | Size / Dimension | Moisture Sensitivity Level (MSL) | Termination | Max Operating Temperature | Min Operating Temperature | Frequency | Height Seated (Max) | RoHS Status | Published | Datasheet | Voltage - Rated DC | Current Rating | Diameter | Package / Case | Length | Height | Width | Voltage - Rated AC | Color | Lead Free | Material | Shape | Depth | Number of Terminations | Factory Lead Time | Weight | Ratings | REACH SVHC | Number of Pins | Pbfree Code | Impedance | Thickness | ECCN Code | Additional Feature | Radiation Hardening | Current | Reach Compliance Code | HTS Code | Packing Method | Number of Functions | Physical Dimension | Filter Type | Terminal Shape | Tolerance | JESD-609 Code | Terminal Finish | Case Code (Metric) | Case Code (Imperial) | Composition | Operating Temperature (Max) | Operating Temperature (Min) | Construction | Test Frequency | Inductance | DC Resistance (DCR) (Max) | DC Resistance (DCR) | Shape/Size Description | Core Material | Shielding | Inductor Application | Terminal Placement | Inductor Type | Case/Size Code | Special Feature | Quality Factor-Min (at L-nom) | Height (Max) | Max DC Current | Number of Lines | Impedance @ Frequency | Current Rating (Max) | Quantity | Current Rating (Amps) | Finish | Q @ Freq | Design | Outer Dimension | Diameter - Inner | Inductance Frequency - Test | Current - Saturation | Material - Core | Frequency - Self Resonant | Adhesive | Inductance @ Frequency | Thickness - Overall | Core Type | Gap | Effective Area (Ae) mm2 | Effective Length (le) mm | Effective Magnetic Volume (Ve) mm3 | Core Factor (ΣI/A) mm1 | Initial Permeability (μi) | Inductance Factor (Al) |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
IC0805C470R-10 | Laird-Signal Integrity Products |
Min: 1 Mult: 1 |
download | IC | Surface Mount | Surface Mount | -40°C~125°C | Tape & Reel (TR) | 0.079Lx0.049W 2.00mmx1.25mm | 1 (Unlimited) | 0.057 1.45mm | RoHS Compliant | 2014 | https://pdf.utmel.com/r/datasheets/lairdsignalintegrityproducts-hz1206c202r10-datasheets-7008.pdf | 300mA | 0805 (2012 Metric) | 1.05mm | 1.45mm | 2 | 6 Weeks | yes | EAR99 | 8504.50.80.00 | TR | 1 | WRAPAROUND | ±10% | e3 | Chip | 50MHz | 47nH | 200mOhm Max | RECTANGULAR PACKAGE | NO | RF INDUCTOR | DUAL ENDED | GENERAL PURPOSE INDUCTOR | 15 | 300mA | 15 @ 50MHz | Ferrite | 320MHz | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
TYS4018330M-10 | Laird-Signal Integrity Products |
Min: 1 Mult: 1 |
download | TYS4018 | Surface Mount | Surface Mount | -40°C~125°C | Tape & Reel (TR) | 0.157Lx0.157W 4.00mmx4.00mm | 1 (Unlimited) | SMD/SMT | 0.079 2.00mm | RoHS Compliant | 2013 | https://pdf.utmel.com/r/datasheets/lairdsignalintegrityproducts-hz1206c202r10-datasheets-7008.pdf | 490mA | Nonstandard | 1.8mm | 10 Weeks | 99.988768mg | EAR99 | unknown | 8504.50.80.00 | ±20% | 100kHz | 33μH | 530mOhm Max | Shielded | GENERAL PURPOSE INDUCTOR | 490mA | 650mA | 12MHz | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
TYS3015150M-10 | Laird-Signal Integrity Products |
Min: 1 Mult: 1 |
download | TYS3015 | Surface Mount | Surface Mount | -40°C~125°C | Tape & Reel (TR) | 0.118Lx0.118W 3.00mmx3.00mm | 1 (Unlimited) | SMD/SMT | 0.067 1.70mm | RoHS Compliant | 2013 | 650mA | Nonstandard | 1.5mm | 10 Weeks | 40.001177mg | EAR99 | unknown | 8504.50.80.00 | ±20% | 100kHz | 15μH | 380mOhm Max | Shielded | GENERAL PURPOSE INDUCTOR | 650mA | 660mA | 30MHz | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
TYS30106R8M-10 | Laird-Signal Integrity Products |
Min: 1 Mult: 1 |
download | TYS3010 | Surface Mount | Surface Mount | -40°C~125°C | Tape & Reel (TR) | 0.118Lx0.118W 3.00mmx3.00mm | 1 (Unlimited) | SMD/SMT | 0.039 1.00mm | RoHS Compliant | 2013 | 660mA | Nonstandard | 1mm | 2 | 10 Weeks | 25.004279mg | EAR99 | unknown | 8504.50.80.00 | 1 | ONE SURFACE | ±20% | 100kHz | 6.8μH | 305mOhm Max | RECTANGULAR PACKAGE | YES | POWER INDUCTOR | DUAL ENDED | GENERAL PURPOSE INDUCTOR | 1212 | DCR MEASURED AT 30% TOLERANCE | 660mA | 550mA | 42MHz | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
TYS50203R6N-10 | Laird-Signal Integrity Products |
Min: 1 Mult: 1 |
download | Wirewound | TYS | Surface Mount | Surface Mount | -40°C~125°C | Tape & Reel (TR) | 0.197Lx0.197W 5.00mmx5.00mm | 1 (Unlimited) | 0.079 2.00mm | RoHS Compliant | 2013 | https://pdf.utmel.com/r/datasheets/lairdsignalintegrityproducts-hz1206c202r10-datasheets-7008.pdf | 2.5A | Nonstandard | 10 Weeks | AEC-Q200 | EAR99 | unknown | 8504.50.80.00 | ±30% | 100kHz | 3.6μH | 43mOhm | Shielded | 100kHz | 2.8A | 43MHz | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
TYS60451R3N-10 | Laird-Signal Integrity Products |
Min: 1 Mult: 1 |
download | Wirewound | TYS | Surface Mount | Surface Mount | -40°C~125°C | Tape & Reel (TR) | 0.236Lx0.236W 6.00mmx6.00mm | 1 (Unlimited) | 0.185 4.70mm | RoHS Compliant | 2013 | https://pdf.utmel.com/r/datasheets/lairdsignalintegrityproducts-hz1206c202r10-datasheets-7008.pdf | 5.4A | Nonstandard | 10 Weeks | AEC-Q200 | EAR99 | unknown | 8504.50.80.00 | ±30% | 100kHz | 1.3μH | 10mOhm | Shielded | 100kHz | 8.35A | 100MHz | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
TYS6020220M-10 | Laird-Signal Integrity Products | $0.39 |
Min: 1 Mult: 1 |
download | TYS6020 | Surface Mount | Surface Mount | -40°C~125°C | Tape & Reel (TR) | 0.236Lx0.236W 6.00mmx6.00mm | 1 (Unlimited) | SMD/SMT | 0.087 2.20mm | RoHS Compliant | 2013 | https://pdf.utmel.com/r/datasheets/lairdsignalintegrityproducts-hz1206c202r10-datasheets-7008.pdf | 1A | Nonstandard | 2mm | 10 Weeks | EAR99 | unknown | 8504.50.80.00 | ±20% | 100kHz | 22μH | 204mOhm Max | Shielded | GENERAL PURPOSE INDUCTOR | 1A | 1.05A | 16MHz | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
TYS40121R0N-10 | Laird-Signal Integrity Products |
Min: 1 Mult: 1 |
download | TYS4012 | Surface Mount | Surface Mount | -40°C~125°C | Tape & Reel (TR) | 0.157Lx0.157W 4.00mmx4.00mm | 1 (Unlimited) | SMD/SMT | 0.047 1.20mm | RoHS Compliant | 2013 | https://pdf.utmel.com/r/datasheets/lairdsignalintegrityproducts-hz1206c202r10-datasheets-7008.pdf | 1.65A | Nonstandard | 1.2mm | 2 | 10 Weeks | 64.013223mg | EAR99 | unknown | 8504.50.80.00 | 1 | ONE SURFACE | ±30% | 100kHz | 1μH | 50mOhm Max | RECTANGULAR PACKAGE | YES | POWER INDUCTOR | DUAL ENDED | GENERAL PURPOSE INDUCTOR | 1616 | DCR MEASURED AT 30% TOLERANCE | 1.65A | 2.61A | 120MHz | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
MGA0603R68M-10 | Laird-Signal Integrity Products |
Min: 1 Mult: 1 |
download | Molded | MGA | Surface Mount | -40°C~125°C | Tape & Reel (TR) | 0.287Lx0.264W 7.30mmx6.70mm | 1 (Unlimited) | 0.130 3.30mm | RoHS Compliant | Nonstandard | 11 Weeks | ±20% | 680nH | 6.3mOhm Max | Unshielded | 15A | 100kHz | 24A | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
MGA04023R3M-10 | Laird-Signal Integrity Products |
Min: 1 Mult: 1 |
download | Molded | MGA | Surface Mount | -40°C~125°C | Tape & Reel (TR) | 0.177Lx0.161W 4.50mmx4.10mm | 1 (Unlimited) | 0.091 2.30mm | RoHS Compliant | Nonstandard | 11 Weeks | ±20% | 3.3μH | 87mOhm Max | Unshielded | 2.5A | 100kHz | 4A | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
1XC0236-2T0-10 | Laird-Signal Integrity Products |
Min: 1 Mult: 1 |
download | Wirewound | Through Hole | 150°C | Tape & Reel (TR) | 0.433Diax0.846L 11.00mmx21.50mm | Radial, Horizontal Cylinder | 10 Weeks | ±25% | 2μH | 3mOhm | Unshielded | 13A | 10kHz | Ferrite | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
MGV0602R10M-10 | Laird-Signal Integrity Products |
Min: 1 Mult: 1 |
download | Molded | MGV | Surface Mount | Surface Mount | -40°C~125°C | Tape & Reel (TR) | 0.287Lx0.264W 7.30mmx6.70mm | Not Applicable | 0.091 2.30mm | RoHS Compliant | 2013 | https://pdf.utmel.com/r/datasheets/lairdsignalintegrityproducts-mgv06021r0m10-datasheets-5281.pdf | 18A | Nonstandard | 2mm | 6.7mm | 10 Weeks | EAR99 | unknown | 8504.50.80.00 | ±20% | Wirewound | 100kHz | 100nH | 3.5mOhm Max | Shielded | 18A | 40A | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
MGV12034R7M-10 | Laird-Signal Integrity Products |
Min: 1 Mult: 1 |
download | Molded | MGV | Surface Mount | -40°C~125°C | Tape & Reel (TR) | 0.531Lx0.496W 13.50mmx12.60mm | Not Applicable | 0.150 3.80mm | 2013 | https://pdf.utmel.com/r/datasheets/lairdsignalintegrityproducts-hz1206c202r10-datasheets-7008.pdf | Nonstandard, 2 Lead | 10 Weeks | EAR99 | 8504.50.80.00 | ±20% | 4.7μH | 16mOhm Max | Shielded | 10A | 100kHz | 24A | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
MHLL6060-300 | Laird-Signal Integrity Products |
Min: 1 Mult: 1 |
download | Flexible Ferrite Sheet | MHLL | -40°C~85°C | Not Applicable | 185°C | -40°C | RoHS Compliant | 2010 | /files/lairdsignalintegrityproducts-hz1206c202r10-datasheets-7008.pdf | 2.362 60.00mm | 2.362 60.00mm | Rubber, Ferrite Powder, PET Film | Square | 100μm | 10 Weeks | Unknown | 50.8μm | Non-Conductive, Single Sided | 0.004 0.09mm | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
35T0100-00P | Laird-Signal Integrity Products |
Min: 1 Mult: 1 |
download | Not Applicable | RoHS Compliant | 2.54mm | 1.27mm | 35 | 12 Weeks | ±20% | Parylene | Toroid | Ungapped | 0.775 | 5.531 | 4.286 | 7.138 | 5000 | 880nH | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
35T0135-60P | Laird-Signal Integrity Products |
Min: 1 Mult: 1 |
download | Not Applicable | RoHS Compliant | 3.56mm | 1.52mm | 35 | 12 Weeks | ±20% | Parylene | Toroid | Ungapped | 1.214 | 7.619 | 9.248 | 6.277 | 5000 | 1.001μH | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
K-C40 | Laird-Signal Integrity Products |
Min: 1 Mult: 1 |
download | Not Applicable | RoHS Compliant | Lead Free | Assorted | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
CM2824B103R-10 | Laird-Signal Integrity Products |
Min: 1 Mult: 1 |
download | CM | Surface Mount | Surface Mount | -40°C~100°C | Tape & Reel (TR) | 0.354Lx0.217W 9.00mmx5.50mm | SMD/SMT | RoHS Compliant | 2007 | /files/lairdsignalintegrityproducts-28b0470000-datasheets-9287.pdf | 80V | 400mA | Horizontal, 4 Flat Lead | 7.5mm | 4.9022mm | 5.5mm | Lead Free | 10 Weeks | 281.227269mg | No SVHC | yes | 10kOhm | EAR99 | 200mA | 8504.50.80.00 | 2 | Power, Signal Line | e3 | Matte Tin (Sn) - with Nickel (Ni) barrier | 12.5GHz | 1.3Ohm | Unshielded | 400mA | 2 | 400Ohm @ 100MHz | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
CM4545Z131B-10 | Laird-Signal Integrity Products |
Min: 1 Mult: 1 |
download | CM | Through Hole | Through Hole | -40°C~125°C | Bulk | 0.448Lx0.448W 11.38mmx11.38mm | Not Applicable | Pin | 100MHz | RoHS Compliant | 2007 | /files/lairdsignalintegrityproducts-28b0470000-datasheets-9287.pdf | 10A | Vertical, 8 PC Pin | 11.38mm | 9.4996mm | 11.38mm | Lead Free | 11 Weeks | 5.121058g | No SVHC | yes | 130Ohm | EAR99 | 10A | 4 | Power Line | e3 | Matte Tin (Sn) - with Nickel (Ni) barrier | 100MHz | 10mOhm | 10A | 4 | 130Ohm @ 100MHz | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
CM2722R151R-10 | Laird-Signal Integrity Products |
Min: 1 Mult: 1 |
download | CM | Surface Mount | Surface Mount | -40°C~125°C | Tape & Reel (TR) | 0.275Lx0.265W 6.99mmx6.73mm | SMD/SMT | 125°C | -55°C | 100MHz | RoHS Compliant | 2007 | /files/lairdsignalintegrityproducts-28b0470000-datasheets-9287.pdf | 5A | Vertical, 8 Flat Lead | 6.985mm | 8.4074mm | 6.731mm | Lead Free | 5.72mm | 11 Weeks | 1.310882g | No SVHC | 8 | 150Ohm | 5A | Power Line | 100MHz | 20mOhm | Unshielded | 0.331 8.40mm | 5A | 4 | 150Ohms @ 100MHz | 5A | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
CMX1211Z680B-10 | Laird-Signal Integrity Products | $7.48 |
Min: 1 Mult: 1 |
download | CMX | Surface Mount | Surface Mount | -40°C~125°C | Bulk | 1.240Lx0.984W 31.50mmx25.00mm | 1 (Unlimited) | RoHS Compliant | 2014 | /files/lairdsignalintegrityproducts-hz1206c202r10-datasheets-7008.pdf | 50A | Horizontal, 4 PC Pad | 18.9992mm | 250V | 10 Weeks | No SVHC | 56Ohm | EAR99 | No | 8504.50.80.00 | Power Line | 68 μH | 0.56mOhm | Ferrite | 50A | 2 | 68μH @ 100kHz | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
CM3818R121R-00 | Laird-Signal Integrity Products |
Min: 1 Mult: 1 |
download | CM | Surface Mount | Surface Mount | Cut Tape (CT) | 0.386Lx0.186W 9.80mmx4.72mm | 1 (Unlimited) | 100MHz | Non-RoHS Compliant | 2003 | /files/lairdsignalintegrityproducts-28b0470000-datasheets-9287.pdf | Vertical, 8 Flat Lead | 9.8mm | 7.8994mm | 4.72mm | Contains Lead | 120Ohm | EAR99 | COMMON MODE CHOKE | 5A | unknown | 8504.50.80.00 | 6 | Power, Signal Line | e0 | TIN LEAD | 125°C | -55°C | 20mOhm | 6 | 120Ohm @ 100MHz | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
CM3822R201R-00 | Laird-Signal Integrity Products |
Min: 1 Mult: 1 |
download | CM | Surface Mount | Surface Mount | -55°C~125°C | Tape & Reel (TR) | 0.385Lx0.265W 9.78mmx6.73mm | 1 (Unlimited) | 100MHz | Non-RoHS Compliant | 2004 | /files/lairdsignalintegrityproducts-cm3822r201r00-datasheets-9450.pdf | Vertical, 12 Flat Lead | 9.78mm | 10.3124mm | Contains Lead | 200Ohm | EAR99 | COMMON MODE CHOKE | 5A | unknown | 8504.50.80.00 | 6 | L9.78XB5.72XH9.53 (mm)/L0.385XB0.225XH0.375 (inch) | Power Line | e0 | Tin/Lead (Sn/Pb) | 20mOhm | 6 | 200Ohm @ 100MHz | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
CC2824E513R-00 | Laird-Signal Integrity Products |
Min: 1 Mult: 1 |
download | CC | Surface Mount | Surface Mount | -40°C~125°C | Tape & Reel (TR) | 0.295Lx0.217W 7.50mmx5.50mm | 1 (Unlimited) | 100kHz | Non-RoHS Compliant | 2007 | /files/lairdsignalintegrityproducts-cc2824e513r00-datasheets-5073.pdf | 80V | Horizontal, 4 Flat Lead | 7.5mm | 3.81mm | 42V | Contains Lead | 3.8kOhm | EAR99 | TEMPERATURE RANGE -40 TO 160 DEG C AVAILABLE | 800mA | unknown | 8504.50.80.00 | 2 | Signal Line | e0 | Tin/Lead (Sn/Pb) | 51 μH | 300mOhm | Unshielded | 2 | 3.8kOhm @ 50MHz | 51μH @ 100kHz | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
CM1812X330R-10 | Laird-Signal Integrity Products |
Min: 1 Mult: 1 |
download | CM | Surface Mount | Surface Mount | Tape & Reel (TR) | 0.180Lx0.120W 4.57mmx3.05mm | 1 (Unlimited) | SMD/SMT | 125°C | -40°C | 100MHz | RoHS Compliant | 2004 | /files/lairdsignalintegrityproducts-cm1812x330r10-datasheets-5439.pdf | 1812 (4532 Metric) | 1.6002mm | Lead Free | 136.077711mg | 33Ohm | EAR99 | 10A | unknown | 8504.50.80.00 | 4532 | 1812 | 100MHz | 3mOhm | 10A | 2 | 33Ohm @ 100MHz | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
FB3888X | Laird-Signal Integrity Products |
Min: 1 Mult: 1 |
download | Not Applicable | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
27A2024-0A2 | Laird-Signal Integrity Products |
Min: 1 Mult: 1 |
download | Round | 27 | Free Hanging | Free Hanging | Bulk | Not Applicable | 100MHz | RoHS Compliant | /files/lairdsignalintegrityproducts-27a20240a2-datasheets-8061.pdf | 1.280 32.51mm | Black | Lead Free | 27 | 260Ohm | 100MHz | 260Ohm @ 100MHz | Hinged (Snap On) | 1.142 W x 1.166 H (29.01mm x 29.62mm) | 0.514 Dia (13.06mm) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
40U1748-020 | Laird-Signal Integrity Products |
Min: 1 Mult: 1 |
download | Not Applicable | RoHS Compliant | /files/lairdsignalintegrityproducts-40u1748020-datasheets-3025.pdf | 6 Weeks | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
28R1775-000 | Laird-Signal Integrity Products |
Min: 1 Mult: 1 |
download | Flat | 28 | Free Hanging | Free Hanging | Tray | Not Applicable | Axial | 125°C | -40°C | 1GHz | RoHS Compliant | 2007 | /files/lairdsignalintegrityproducts-hz1206c202r10-datasheets-7008.pdf | 1.125 28.58mm | 12.45mm | 28.58mm | White | Lead Free | 28 | 28.58mm | 8 Weeks | 71.536053g | Unknown | 26 | 260Ohm | No | 100MHz | Unshielded | 260Ohm @ 100MHz | Solid | 1.775 W x 0.490 H (45.08mm x 12.45mm) | 1.355 W x 0.060 H (34.42mm x 1.52mm) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
28S2001-0P0 | Laird-Signal Integrity Products | $3.36 |
Min: 1 Mult: 1 |
download | Flat | 28 | Chassis Mount | Chassis Mount | Tray | Not Applicable | Axial | 125°C | -40°C | 100MHz | RoHS Compliant | 2007 | /files/lairdsignalintegrityproducts-hz1206c202r10-datasheets-7008.pdf | Metal | 1.125 28.58mm | 6.35mm | 28.58mm | White | Lead Free | 28 | 28.58mm | 8 Weeks | 50.135565g | 2001 | 280Ohm | No | 100MHz | 280Ohm | Unshielded | 280Ohm @ 100MHz | Clip Together (Order Qty 2=1 Assembly) | 2.500 W x 0.250 H (63.50mm x 6.35mm) | 2.050 W x 0.033 H (52.07mm x 0.84mm) |
Please send RFQ , we will respond immediately.