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SK055NTP
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Product Detailed Parameters
- Description：SCR 1KV 55A TO263
- Series：-
- Mfr：Littelfuse Inc.
- Package：Tube
- Voltage - Off State：1 kV
- 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
- Grade：-
- Qualification：-
- Mounting Type：Surface Mount
- Package / Case：TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Supplier Device Package：TO-263 (D2PAK)
- 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)：30 µA
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Overview
The Littelfuse SK055NTP is a silicon-controlled rectifier (SCR) from the Teccor Sxx55x series, designed for high-power switching applications. It features a rated repetitive off-state voltage of 1 kV and an RMS on-state current of 55 A. The device operates within a temperature range of -40°C to +125°C and utilizes an SMTO-218 through-hole package. Key electrical characteristics include a maximum holding current of 60 mA, a forward voltage drop of 1.8 V, and a gate trigger current of 40 mA at 1.5 V. It supports a non-repetitive peak on-state current of 650 A with a low leakage current of 30 uA under rated voltage conditions.
Feature Summary
- High power density in a compact SMTO-218 through-hole package
- Robust thermal performance with a maximum operating temperature of +125°C
- Fast turn-on capability with a peak non-repetitive surge current of 650 A
Applications
- Industrial motor control systems
- High-power AC/DC conversion circuits
- Solid-state relays and contactors
Procurement Notes
Verify the specific suffix 'NTP' against the manufacturer's official datasheet to confirm pinout orientation and packaging details. Ensure the selected component matches the required voltage and current ratings for the target circuit design before procurement.
Selection Notes
Select this SCR for applications requiring 55 A continuous current handling and 1 kV blocking voltage. Consider the 1.8 V forward voltage drop for thermal management calculations. Verify that the gate drive circuit can supply the specified 40 mA trigger current reliably across the full operating temperature range.
Part Context
This component belongs to the Littelfuse Teccor Sxx55x family of SCRs. These devices are engineered for general-purpose high-current switching in industrial and commercial power electronics. The series offers standardized pinouts and robust construction for reliable operation in demanding electrical environments.
Replacement Considerations
Consult official substitution guides for equivalent SCRs with matching 55 A and 1 kV ratings. Verify pin compatibility and thermal resistance values when considering alternative manufacturers or packages.
