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S4055MTP
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Product Detailed Parameters
- Description：SCR 400V 55A TO218
- 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-218-3, TO-218AC
- Supplier Device Package：TO-218 Non-Isolated Tab
- 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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Overview
The Littelfuse S4055MTP is a Silicon Controlled Rectifier (SCR) from the Teccor Sxx55x series, designed for high-current switching applications. It features a rated repetitive off-state voltage (VDRM) of 400 V and an on-state RMS current (It RMS) of 55 A. The device operates within a temperature range of -40°C to +125°C and utilizes a TO-218AC (SMTO-218) through-hole package with flange mounting. Key electrical characteristics include a maximum holding current of 60 mA, a forward voltage drop of 1.8 V, and a gate trigger voltage of 1.5 V at 40 mA. It supports a non-repetitive peak on-state current of 650 A.
Feature Summary
- High thermal stability with a maximum operating temperature of +125°C
- Robust surge handling capability with 650 A non-repetitive peak current rating
- Low conduction loss characterized by 1.8 V forward voltage drop
- Standardized flange-mount packaging for efficient heat dissipation
Applications
- Industrial motor control systems
- Solid-state relays
- Power regulation circuits
Procurement Notes
Verify the specific datasheet revision and RoHS compliance status directly with Littelfuse or authorized distributors before integration. Confirm that the SMTO-218 package dimensions match the target PCB footprint and thermal management requirements. Ensure the gate trigger parameters align with the driving circuit capabilities to guarantee reliable turn-on under all operating conditions.
Selection Notes
Select the S4055MTP when a 400 V blocking voltage and 55 A continuous current capacity are required in a through-hole configuration. Compare against the S4055NRP if surface mount assembly is preferred, noting the package difference between SMTO-218 and SMTO-263-2. Evaluate thermal resistance requirements based on the expected RMS current load and ambient temperature constraints.
Part Context
This component belongs to the Littelfuse Teccor Sxx55x family of SCRs, which provides standardized performance across various voltage ratings. The 'S40' prefix indicates the 400 V voltage class, while '55' denotes the 55 A current rating. This series is engineered for general-purpose power control applications requiring reliable latching behavior and robust surge tolerance.
Replacement Considerations
The S4055NRP serves as a surface-mount alternative within the same electrical specification family, utilizing an SMTO-263-2 package instead of the through-hole SMTO-218. Verify pinout compatibility and thermal interface differences when substituting packages.
