S4055WTP

$2.86

Description：SCR 400V 55A TO218X
Series：-

SKU:29dbc30bedde Category: SCRs Brand: Littelfuse Inc.

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Product introduction

Product Detailed Parameters

Description：SCR 400V 55A TO218X
Series：-
Mfr：Littelfuse Inc.
Package：Tube
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)：550A, 650A
SCR Type：Standard Recovery
Operating Temperature：-40°C ~ 125°C
Mounting Type：Through Hole
Package / Case：TO-218X-3
Supplier Device Package：TO-218X
Voltage - On State (Vtm) (Max)：1.8 V
Current - On State (It (AV)) (Max)：35 A
Current - On State (It (RMS)) (Max)：55 A
Current - Off State (Max)：10 µA

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S4055WTP

Overview

The Littelfuse S4055WTP is a standard phase control Silicon Controlled Rectifier (SCR) designed for through-hole mounting in the TO-218X package. It features a rated repetitive off-state voltage of 400 V and an RMS on-state current of 55 A. The device has a maximum holding current of 60 mA, a gate trigger voltage of 1.5 V, and a gate trigger current of 40 mA. It operates within a temperature range of -40°C to +125°C and exhibits a forward voltage drop of 1.8 V.

Feature Summary

Standard phase control SCR architecture optimized for reliable switching performance
Through-hole TO-218X package design facilitating robust mechanical mounting
High thermal stability supporting operation across extended industrial temperature ranges

Applications

Phase control applications
Heating system controls
Motor speed control circuits

Procurement Notes

Verify the specific suffix 'WTP' against the manufacturer's official datasheet to confirm pinout configuration and packaging details. Ensure the selected component matches the required 400V rating and 55A current capacity for the target circuit design. Cross-reference the TO-218X package dimensions with PCB layout constraints before finalizing procurement orders.

Selection Notes

Select this component when a standard phase control SCR is required for AC power regulation tasks. The 400V rating suits low-voltage AC systems, while the 55A RMS current handles moderate load demands. Consider the through-hole mounting requirement and thermal management needs associated with the TO-218X package for proper heat dissipation in the final assembly.

Part Context

This part belongs to the S4055 series of low-power SCRs manufactured by Littelfuse under the Teccor brand. These devices are engineered as unidirectional switches for general-purpose phase control. The series offers various voltage ratings up to 1200V, with the S4055 variant specifically targeting 400V applications requiring reliable thyristor switching capabilities.