1N4937G

Overview

The onsemi 1N4937G is an axial-lead, glass-passivated fast recovery rectifier designed for high-efficiency switching applications. It features a peak repetitive reverse voltage of 600 V and supports an average rectified forward current of 1.0 A at 75°C ambient temperature. The device exhibits a typical reverse recovery time ranging from 150 to 200 ns, with a maximum of 300 ns under specified test conditions. It withstands a non-repetitive peak surge current of 30 A and operates within a junction temperature range of -65°C to +150°C.

Feature Summary

• Glass passivation provides low reverse leakage current and enhanced reliability.
• Fast switching characteristics enable high efficiency in frequencies up to 250 kHz.
• Plastic package construction utilizes void-free molded technique for thermal stability.

Applications

• DC power supplies
• Inverters and converters
• Ultrasonic systems
• Choppers
• Free wheeling diodes

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm packaging format. The 'G' suffix indicates a lead-free device compliant with RoHS standards. Confirm whether the required quantity is available in bulk bags or tape and reel formats by checking the manufacturer's current shipping information. Ensure the component meets all environmental and safety certifications required for the target application before finalizing procurement.

Selection Notes

Select this component when a fast recovery rectifier with a 600 V rating and 1 A continuous current capacity is required. Consider the 150 ns to 300 ns reverse recovery time for high-frequency switching circuits operating up to 250 kHz. Evaluate the thermal resistance of 65°C/W and derating requirements for capacitive loads if operating near maximum ratings. Ensure the DO-41 axial lead package fits the mechanical constraints of the printed circuit board design.

Part Context

This part belongs to the 1N493x series of fast recovery rectifiers manufactured by onsemi. The series includes variants with different reverse voltage ratings, such as 50 V, 100 V, 200 V, and 400 V. All members share similar physical dimensions and electrical characteristics regarding forward current and surge capability, differing primarily in their blocking voltage specifications.

Replacement Considerations

Cross-reference with other manufacturers offering equivalent 1N4937 specifications. Verify that substitute parts maintain the same DO-41 package outline and pin configuration. Confirm that replacement devices meet or exceed the 600 V reverse voltage and 1.0 A forward current ratings. Check for identical reverse recovery time limits to ensure circuit performance compatibility.