Sxx40x Series - 40 Amp Standard SCRs

40 Amp Standard SCRs
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Disclaimer Notice

Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse. "Littelfuse" includes Littelfuse, Inc., and all of its affiliate entities.

40 Amp bi-directional solid state switch series is designed for AC switching and phase control applications such as motor speed and temperature modulation controls, lighting controls, and static switching relays.

Alternistor type devices only operate in quadrants I, II, & III and are used in circuits requiring high dv/dt capability.

Features & Benefits:
  • RoHS compliant
  • Glass - passivated junctions
  • Voltage capability up to 1000V
  • Surge capability up to 400A
  • Electrically isolated K & J -Packages are UL recognized for 2500Vrms

  • Excellent for AC switching and phase control applications such as heating, lighting, and motor speed controls
  • Typical applications are AC solid-state switches, industrial power tools, exercise equipment, white goods and commercial appliances
  • Alternistor Triacs (no snubber required) are used in applications with extremely inductive loads requiring highest commutation performance
  • Internally constructed isolated packages are offered for ease of heat sinking with highest isolation voltage

Access specifications, certifications, check availability and order parts below

Catalog #SizeIT(RMS) (A)VDRM (V)IDRM@
di/dt @
dv/dt @
tgt (μs)Tq (μs)IDRM@
S4040NTO-263 (D2Pak)404000.01401.85201752.5352CheckOrder
S4040NQTO-263 (D2Pak)404000.02351.85001505501.5156CheckOrder
S4040RTPTO-220 Non-Isolated Tab404000.01401.85201752.5352CheckOrder
S6040NTO-263 (D2Pak)406000.01401.85201752.5352CheckOrder
S6040RTPTO-220 Non-Isolated Tab406000.01401.85201752.5352CheckOrder
S8040NTO-263 (D2Pak)408000.02401.85201752.5353CheckOrder
S8040RTPTO-220 Non-Isolated Tab408000.02401.85201752.5353CheckOrder
SK040NTO-263 (D2Pak)4010000.03401.85201752.535CheckOrder
SK040RTPTO-220 Non-Isolated Tab4010000.03401.85201752.535CheckOrder
Obsolete: 2011 -12-31
Replaced By: S4040N
TO-263 (D2Pak)402000.01401.85201755502.5352Check
Obsolete: 2011 -12-31
Replaced By: S4040R
TO-220 Non-Isolated Tab402000.01401.85201755502.5352Check
Obsolete: 2016 -03-31
Replaced By: S4040RTP
TO-220 Non-Isolated Tab404000.01401.85201752.5352Check
Obsolete: 2016 -03-31
Replaced By: S6040RTP
TO-220 Non-Isolated Tab406000.01401.85201752.5352Check
Obsolete: 2016 -03-31
Replaced By: S8040RTP
TO-220 Non-Isolated Tab408000.02401.85201752.5353Check
Obsolete: 2016 -03-31
Replaced By: SK040RTP
TO-220 Non-Isolated Tab4010000.03401.85201752.535Check

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