MCR708A1

Scrs Overview

The MCR708A1 is a sensitive gate silicon controlled rectifier (SCR) from the MCR703A Series, manufactured by onsemi. It features a reverse blocking thyristor design in a DPAK-3 (Case 369D) surface mount package with straight leads. The device supports a peak repetitive off-state voltage of 600 V and an RMS on-state current of 4.0 A. Key electrical characteristics include a maximum gate trigger current of 75 µA at 25°C and a holding current of 5 mA. It operates within a junction temperature range of -40°C to +110°C.

Scrs Feature Summary

• Sensitive gate architecture enabling low-level triggering for efficient control circuits
• Passivated die surface designed to ensure reliability and uniformity across high-volume production
• Epoxy compound meets UL 94 V-0 flammability rating for enhanced safety compliance

Scrs Applications

• Temperature control systems
• Light dimming and speed control applications
• Process control and remote control circuits
• Warning systems requiring critical operational reliability

Scrs Procurement Notes

Verify the specific ordering suffix '1' corresponds to the DPAK-3 (Case 369D) package style with straight leads shipped in sleeves, distinct from the standard DPAK tape and reel options. Confirm Pb-free availability if required by environmental specifications. Ensure compatibility with the recommended minimum pad sizes for Case 369D to maintain thermal performance ratings. Cross-reference the datasheet revision date against manufacturing lot codes for accurate technical alignment.

Scrs Selection Notes

Select this component when a robust, low-cost SCR is needed for consumer applications requiring reliable switching under varying thermal conditions. The sensitive gate characteristic simplifies drive circuitry compared to standard gates. Consider the 600V blocking capability for mains-connected loads. Evaluate the thermal resistance parameters against the expected ambient temperatures to ensure the junction temperature remains within the specified operating range during continuous conduction.

Scrs Part Context

This part belongs to the MCR703A Series, which includes variants rated for 100V, 400V, and 600V. The series is engineered for high-volume, low-cost consumer electronics. The MCR708A variant specifically denotes the 600V rating within this family. The '1' suffix differentiates the physical package geometry from other series members, ensuring mechanical fitment in designs requiring straight lead surface mount configurations.

Scrs Replacement Considerations

The datasheet recommends the MCR708A1 as an electrical replacement for the C106 series devices. Verify that substitute parts match the 600V blocking voltage and 4.0A RMS current requirements. Ensure any alternative maintains comparable gate trigger sensitivity and holds similar thermal resistance characteristics for direct board-level substitution.