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S4040RQ3
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Product Detailed Parameters
- Description：SCR 400V 40A TO220AB-R
- Series：-
- Mfr：Littelfuse Inc.
- Package：Bulk
- Voltage - Off State：400 V
- Voltage - Gate Trigger (Vgt) (Max)：1.5 V
- Current - Gate Trigger (Igt) (Max)：40 mA
- Current - Hold (Ih) (Max)：60 mA
- Current - Non Rep. Surge 50, 60Hz (Itsm)：430A, 520A
- SCR Type：Standard Recovery
- Operating Temperature：-40°C ~ 125°C
- Mounting Type：Through Hole
- Package / Case：TO-220-3
- Supplier Device Package：TO-220AB-R
- Voltage - On State (Vtm) (Max)：1.8 V
- Current - On State (It (AV)) (Max)：25 A
- Current - On State (It (RMS)) (Max)：40 A
- Current - Off State (Max)：10 µA
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Overview
The Littelfuse S4040RQ3 is a Silicon Controlled Rectifier (SCR) from the Teccor series, designed for high-power switching applications. It features a rated repetitive off-state voltage of 400 V and an on-state RMS current capacity of 40 A. The device operates within a temperature range of -40°C to +125°C and utilizes a TO-220-3 through-hole package. Key electrical characteristics include a gate trigger voltage of 1.5 V, a gate trigger current of 40 mA, and a maximum holding current of 60 mA. Off-state leakage current is specified at 10 uA under VDRM conditions.
Feature Summary
- Robust thermal management capability with a wide operating temperature range suitable for demanding environments.
- High current handling capacity enabling efficient control in power conversion circuits.
- Standardized pinout configuration facilitating integration into existing through-hole PCB layouts.
Applications
- AC motor speed control systems
- Solid-state relays
- Lighting dimmer circuits
Procurement Notes
Verify component authenticity by cross-referencing the manufacturer part number and date code against official Littelfuse documentation. Ensure the TO-220-3 package matches design requirements. Confirm RoHS compliance status via the specific datasheet revision prior to finalizing procurement orders.
Selection Notes
Select this SCR based on its 400 V blocking voltage and 40 A RMS current rating. Ensure the gate trigger parameters align with the driving circuit capabilities. Consider the through-hole mounting style for mechanical stability and heat dissipation needs compared to surface-mount alternatives.
Part Context
This component belongs to the Littelfuse Teccor family of SCRs, which are widely used for AC power control. The S4040RQ3 variant specifically denotes the through-hole packaging option within the broader S4040 series, offering distinct mechanical integration benefits over surface-mount counterparts like the S4040NRP.
Replacement Considerations
Direct substitutes may include other 40A 400V SCRs in TO-220 packages from manufacturers such as STMicroelectronics or Vishay. Verify pin compatibility and thermal resistance values before substitution.
FAQ
What is the maximum junction temperature for the S4040RQ3?
The maximum operating temperature is specified as +125°C.
Does the S4040RQ3 support surface mount technology?
No, the S4040RQ3 is packaged in a TO-220-3 through-hole case. Surface mount versions exist under different suffixes, such as S4040NRP.
