S4040xQx Series - 40 Amp Low Tq SCR, TO-220 and TO-263 packages

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The S4040xQx series of SCRs offer fast turn-off time (tq) characteristics required for applications such as power inverters, switching regulator, and high frequency pulse circuits.
These fast turn-off time SCRs offer high dv/dt and high di/dt characteristics required in higher frequency (>1000 PPS) switching circuits.

• Voltage capability up to 400 V
• Surge capability up to 520 A
• TO-220 and TO-263 packages
• RoHS compliant
• Glass – passivated junctions

Fast turn-off time SCRs are ideal for multi phase voltage regulator circuits, DC/AC inverters, and higher frequency pulsing power supplies.

Access specifications, certifications, check availability and order parts below

Catalog #IT(RMS) (A)VDRM (V)IDRM@
di/dt @
dv/dt @
tgq (µs)tgt (μs)Partner ECAD ModelsStockSamplesCompare
Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s) IPC-Material Declaration
S4040NQ2RP SCR 400V 40A LOW TQ TO263 RoHS No 01/01/1996 PbFree No 07/10/2012 Yes
S4040NQ3RP SCR 400V 40A LOW TQ TO263 RoHS No 05/06/2015 PbFree No 06/16/2015 CoC_RoHS9_S4040NQ3RP REACH211_Declaration_Contain-_S4040NQ3RP Yes
Contains IPC_S4040NQ3RP_-Sxx40NQx
S4040NQRP SCR 400V 40A LOW TQ TO263 RoHS No 01/01/1996 PbFree No CoC_RoHS9_S4040NQRP REACH211_Declaration_(Contain)_S4040NQRP Yes
Contains IPC_S4040NQRP
S4040RQ2TP SCR 400V 40A LOW TQ TO220 RoHS No 01/01/1996 PbFree No Yes
S4040RQ3TP SCR 400V 40A LOW TQ TO220 RoHS No 06/02/2015 PbFree No 06/16/2015 Yes
S4040RQTP SCR 400V 40A LOW TQ TO220 RoHS No 04/23/2019 PbFree No 04/23/2019 CoC_RoHS9_S4040RQTP REACH205_Declaration_Contain-_S4040RQTP Yes
Contains IPC_S4040RQTP
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2021-08-12_IATF 16949_ LF Semiconductor_Wuxi

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