S8070W

Overview

The Littelfuse S8070W is a silicon-controlled rectifier (SCR) designed for high-reliability power control applications. It utilizes a TO-218 flange mount package with three terminals and an anode-connected case for efficient heat dissipation. Key electrical specifications include a maximum DC gate trigger current of 50 mA and a maximum DC gate trigger voltage of 2 V. The device features a circuit commutated turn-off time of 35 µs and a critical rate of rise of off-state voltage of 250 V/µs. It maintains a maximum holding current of 50 mA and has a maximum leakage current of 2 mA. The component is RoHS compliant and classified under JEDEC-95 code TO-218.

Feature Summary

• High reliability construction suitable for demanding industrial environments
• Flange mount configuration enables direct heatsink attachment for thermal management
• Anode-connected case simplifies mounting and electrical isolation strategies

Applications

• Industrial power control systems requiring robust switching capabilities
• Motor control circuits utilizing silicon-controlled rectifiers
• High-reliability electronic assemblies in harsh operating conditions

Procurement Notes

Verify the specific Littelfuse datasheet to confirm exact voltage ratings and current handling capabilities before integration. Ensure the TO-218 package dimensions match the mechanical design constraints. Confirm RoHS compliance status if required by regulatory standards. Check for any specific ordering suffixes that may indicate variations in packaging or testing levels. Validate thermal resistance parameters against the intended heatsink design.

Selection Notes

Select this component when a single-phase SCR with flange mounting is required for high-current applications. Consider the 35 µs turn-off time for frequency limitations in commutated circuits. Evaluate the 250 V/µs dv/dt rating against transient voltage conditions in the circuit. Ensure the gate drive circuit can supply up to 50 mA at 2 V for reliable triggering. Compare thermal performance requirements with the TO-218 package capabilities.

Part Context

The S8070W belongs to Littelfuse's portfolio of power semiconductors, specifically within the silicon-controlled rectifier category. It is part of a broader range of components designed for safe and efficient electrical energy transfer. Littelfuse manufactures these devices in facilities adhering to strict quality standards for industrial and automotive applications. The product line emphasizes reliability and performance in power control scenarios.

Replacement Considerations

Consult official Littelfuse documentation for verified cross-reference part numbers. Ensure substitute components match the TO-218 package and pinout configuration. Verify that replacement SCRs meet or exceed the 35 µs turn-off time and 250 V/µs dv/dt specifications. Confirm identical gate trigger characteristics to maintain circuit stability.