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Littelfuse S4055NRP Standard SCR

The 55 Amp Standard SCRs are high-performance thyristors designed for reliable phase control in industrial applications such as motor speed regulation, heating, and power switching. Featuring a robust glass-passivated junction capable of withstanding voltages up to 1000V, these devices offer excellent surge capability of up to 650A, ensuring durability under transient conditions. They are RoHS compliant, with a compact TO-218AC package and non-isolated mounting tab for easy installation. Ideal for resistive and inductive loads, these SCRs are engineered for efficient power control with low gate trigger current and high surge ratings, suited for automation and industrial power systems.

Authorized Distributors
Source:Newark
Part No:S4055NRP
Stock:24
Inv Date:05-28-2026
Price: Unit price: $0.669
Buy/RFQ:
Source:DigiKey
Part No:S4055NRP
Stock:1000
Inv Date:05-28-2026
Price: Unit price: $2.71176
Buy/RFQ:
Part No:S4055NRP
Stock:1879
Inv Date:05-29-2026
Price: Unit price: $7.04
Buy/RFQ:
Part No:S4055NRP
Stock:0
Inv Date:05-28-2026
Price: Unit price: $5.12
Buy/RFQ:

Littelfuse S4055NRP Standard SCR Specifications:

  • Surge Capability: up to 650A
  • Voltage Rating: 400V, 600V, 800V, 1000V options
  • Peak Gate Current: 4.0A
  • Repetitive Peak Forward Blocking Voltage: 400V to 1000V adjustable
  • Average On-State Current: up to 55A
  • Maximum RMS on-state current at 90°C: 55A
  • Package Types: TO-218AC, TO-220, TO-218X, TO-263 with corresponding physical dimensions
  • Case Temperature Range: -40°C to +125°C
  • Storage Temperature Range: -40°C to +150°C
  • Material: Copper alloy leads, matte tin-plated finish, UL recognized epoxy
  • Lead Material: Copper alloy
  • Soldering Parameters: Preheat max 200°C, peak 260°C, 60-180 sec

Buy the Littelfuse Series Sxx55 SCR: 55 Amp Standard SCRs

Purchase Littelfuse Series Sxx55 SCR today for dependable phase control applications. Engineered with a high surge capacity of up to 650A and voltage ratings up to 1000V, these SCRs ensure efficient operation in industrial environments. Suitable for resistive and inductive loads, they feature low gate trigger current and robust construction for longevity. Whether for motor speed regulation, heating, or power switching, these high-quality thyristors combine reliable performance, easy installation, and compliance with RoHS standards, making them a smart choice for professional engineers and system designers.

Get Littelfuse Series Sxx55 SCR today—built for precision, high surge current, and long-lasting durability in industrial power control.

Frequently Asked Questions

Where can I buy Littelfuse S4055NRP?

You can click on the BUY or RFQ button to purchase S4055NRP from an authorized Littelfuse distributor.

How do I troubleshoot issues or seek technical support for part S4055NRP?

You can download the S4055NRP datasheet or visit the Littelfuse website for support.

Who is the manufacturer of S4055NRP?

Littelfuse

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