SCT840B

Description：DIODE
Series：-

SKU:546ddbe373f4 Category: SCRs Brand: SMC Diode Solutions

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Product introduction

Product Detailed Parameters

Description：DIODE
Series：-
Mfr：SMC Diode Solutions
Package：Bulk
Voltage - Off State：800 V
Voltage - Gate Trigger (Vgt) (Max)：1.5 V
Current - Gate Trigger (Igt) (Max)：35 mA
Current - Hold (Ih) (Max)：75 mA
Current - Non Rep. Surge 50, 60Hz (Itsm)：460A @ 50Hz
SCR Type：Standard Recovery
Operating Temperature：-40°C ~ 150°C (TJ)
Grade：-
Qualification：-
Mounting Type：Through Hole
Package / Case：TO-220-3
Supplier Device Package：TO-220B
Voltage - On State (Vtm) (Max)：1.55 V
Current - On State (It (AV)) (Max)：-
Current - On State (It (RMS)) (Max)：40 A
Current - Off State (Max)：10 µA

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SCT840B

Overview

The SCT840B is a standard recovery silicon controlled rectifier (SCR) manufactured by SMC Diode Solutions. It features an off-state voltage rating of 800 V and a maximum on-state current of 40 A. The device supports a non-repetitive surge current of 460 A at 50 Hz. It utilizes a TO-220B through-hole package for mounting. The component is currently classified as obsolete in the manufacturer's product line.

Feature Summary

Standard recovery thyristor technology
Through-hole TO-220B package configuration
High voltage blocking capability

Applications

Industrial power control systems
Motor drive applications
General purpose rectification circuits

Procurement Notes

This component is officially listed as obsolete by the manufacturer. Procurement should focus on verifying the authenticity of remaining stock from authorized distributors or secondary market suppliers. Ensure that any available units meet original specification requirements before integration into new designs, as production has ceased.

Selection Notes

Designers requiring active replacement components should consult current SMC Diode Solutions catalogs for equivalent SCR series with matching voltage and current ratings. Consider thermal management requirements associated with the TO-220B package when selecting alternatives to ensure system reliability matches the original design parameters.

Part Context

The SCT840B belongs to the discrete semiconductor product category, specifically within the thyristors and SCRs segment. It represents a legacy offering from SMC Diode Solutions, designed for robust industrial applications requiring reliable switching and rectification capabilities under high voltage conditions.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the source data. Users must verify cross-reference compatibility with other manufacturers' 800V 40A SCRs independently.

How to buy

Online and offline orders are supported. If the item is available for online purchase, you can place it in the cart; for wholesale pricing, please contact our product manager for a quote.

Payment Method

Payment methods: T/T, WeChat Pay, credit cards, Google Pay, Apple Pay . Buyer covers shipping, fees, duties, and taxes; contact our product manager if you need a contract/procurement process.

Delivery time

In-stock items usually ship within 24 hours. Otherwise, shipment is arranged 1 to 2 days after the items arrive at our warehouse. Timing depends on destination and shipping method.

Freight calculation

Freight cost depends on destination, package size, and weight . We offer shipping options via DHL, FedEx, UPS, and TNT , and can ship using your freight account upon request.

Mode of Transportation

We ship via DHL, FedEx, UPS, and TNT. If you prefer a specific logistics provider, we can ship using your designated carrier.

Return and Refund

Returns are accepted within 60 days of invoice with RMA approval. Items must be resalable; original invoice and test report are required. No returns for customer errors.