SS34 R7G Equivalent & Substitute Parts

Part Overview

The SS34 R7G is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 40 V DC reverse voltage and 3 A average rectified current in a surface mount DO-214AB (SMC) package. This component is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives for ongoing design requirements and production continuity. The part operates across a junction temperature range of -55°C to 150°C and complies with RoHS3 and REACH standards.

Substiute Parts

SS34 R7G

Taiwan Semiconductor CorporationIn Stock: 1088SS34 R7G Datasheet

Current PartRFQ

SS34-M3/57T

Vishay General Semiconductor - Diodes DivisionIn Stock: 4227SS34-M3/57T Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SS34 R7G is determined by strict equivalence across the following electrical and mechanical parameters:

• Voltage Rating: Maximum DC reverse voltage of 40 V
• Current Rating: Average rectified current of 3 A
• Forward Voltage Drop: 500 mV maximum at 3 A
• Recovery Speed: Fast recovery characteristic ≤ 500ns for currents > 200mA
• Reverse Leakage: 500 µA maximum at 40 V
• Package: DO-214AB (SMC) surface mount configuration
• Compliance: RoHS3 and REACH compliance status

The SS34-M3/57T manufactured by Vishay General Semiconductor - Diodes Division meets all specified electrical parameters and package requirements. This substitute maintains identical voltage, current, forward voltage, recovery speed, and reverse leakage characteristics while providing active product status and improved inventory availability.

Parameter Comparison

*The SS34-M3/57T operates to 125°C maximum junction temperature, which is 25°C lower than the SS34 R7G specification of 150°C. Applications requiring operation above 125°C junction temperature require thermal analysis to confirm suitability.

Engineering Selection Recommendations

The SS34-M3/57T from Vishay General Semiconductor - Diodes Division is the direct electrical and mechanical equivalent for the discontinued SS34 R7G. Selection criteria are based on the following factors:

Product Status: The SS34-M3/57T maintains active product status with established supply chain availability (4213 pieces in stock), whereas the SS34 R7G is discontinued at DiGi Electronics.

Electrical Equivalence: All critical electrical parameters—voltage rating, current rating, forward voltage drop, recovery speed, and reverse leakage current—are identical between the two parts.

Package Compatibility: Both parts use the DO-214AB (SMC) surface mount package, ensuring direct PCB footprint compatibility without layout modifications.

Compliance: Both parts meet RoHS3 and REACH requirements with MSL 1 (Unlimited) moisture sensitivity rating, maintaining regulatory compliance for production and deployment.

Temperature Consideration: The SS34-M3/57T maximum junction temperature of 125°C is 25°C lower than the SS34 R7G. Applications operating at junction temperatures between 125°C and 150°C require thermal design verification to confirm the substitute remains within safe operating limits.

Technology Difference: The SS34-M3/57T is classified as a Schottky diode technology, whereas the SS34 R7G is a standard rectifier diode. Both technologies achieve the specified electrical parameters and fast recovery characteristics required for this application category.

Frequently Asked Questions (FAQ)

Q: Can the SS34-M3/57T directly replace the SS34 R7G without circuit modifications?

A: Yes. The SS34-M3/57T provides identical electrical ratings (40 V, 3 A, 500 mV forward voltage, fast recovery speed) and uses the same DO-214AB surface mount package. No circuit modifications are required for electrical or mechanical compatibility.

Q: What is the difference between the standard rectifier diode (SS34 R7G) and the Schottky diode (SS34-M3/57T)?

A: Both parts meet the specified electrical parameters for this application. The Schottky technology in the SS34-M3/57T typically provides lower forward voltage drop and faster switching characteristics, but both achieve the 500 mV maximum forward voltage and fast recovery speed specified for the SS34 R7G.

Q: Does the lower maximum junction temperature of the SS34-M3/57T (125°C vs. 150°C) affect suitability?

A: The 25°C difference in maximum junction temperature specification requires evaluation based on actual circuit thermal conditions. If the application design ensures junction temperature remains below 125°C under worst-case operating conditions, the substitute is suitable. Applications requiring operation above 125°C junction temperature require thermal analysis or alternative component selection.

Q: Are both parts available in the same packaging format?

A: Yes. Both the SS34 R7G and SS34-M3/57T use the DO-214AB (SMC) surface mount package. The SS34-M3/57T is available in Cut Tape (CT) and Digi-Reel® packaging formats, providing flexibility for production volumes.

Q: Do both parts meet the same regulatory compliance standards?

A: Yes. Both parts are RoHS3 compliant and REACH unaffected, with MSL 1 (Unlimited) moisture sensitivity rating. Regulatory compliance is maintained with the substitute part.

Q: What is the inventory status difference between these parts?

A: The SS34 R7G has 986 pieces in stock but is discontinued at DiGi Electronics. The SS34-M3/57T has 4213 pieces in stock and maintains active product status, providing superior long-term supply chain availability.