SS34 R7 Schottky Diode Equivalent & Substitute Parts

Part Overview

The SS34 R7 is a Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 40 V DC reverse voltage and 3 A average rectified current in a DO-214AB surface mount package. This component is classified as discontinued at DiGi Electronics, necessitating identification of active equivalent parts for ongoing procurement and design requirements. The part operates across a junction temperature range of -55°C to 125°C and meets ROHS3 compliance standards.

Substiute Parts

SS34 R7

Taiwan Semiconductor CorporationIn Stock: 815SS34 R7 Datasheet

Current PartRFQ

SS34H

Taiwan Semiconductor CorporationIn Stock: 749SS34H Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SS34 R7 is determined by electrical and mechanical parameter equivalence within the Schottky diode rectifier category. The critical parameters governing substitution are:

• Voltage Rating: DC reverse voltage of 40 V maximum
• Current Rating: Average rectified current of 3 A
• Forward Voltage Drop: 500 mV maximum at 3 A forward current
• Recovery Speed: Fast recovery characteristic ≤ 500ns for currents > 200mA
• Reverse Leakage: 500 µA maximum at 40 V reverse bias
• Package Type: DO-214AB surface mount configuration
• Temperature Range: -55°C to 125°C junction operating range
• Compliance: ROHS3 compliance and MSL 1 rating

The SS34H qualifies as a parametric equivalent substitute, meeting all electrical specifications and mechanical packaging requirements while offering active product status and automotive-grade qualification.

Parameter Comparison

Engineering Selection Recommendations

The SS34H serves as the direct parametric equivalent for the discontinued SS34 R7. Both components share identical electrical specifications across all critical parameters: 40 V reverse voltage rating, 3 A average rectified current, 500 mV forward voltage drop at 3 A, and fast recovery switching characteristics.

The SS34H maintains active product status with current inventory availability (673 pieces in stock), ensuring procurement continuity. The substitute part carries automotive-grade qualification (AEC-Q101) and meets ROHS3 compliance requirements identical to the original part. Packaging configuration remains unchanged at DO-214AB surface mount, permitting direct board-level substitution without layout modification.

The primary distinction between the two parts is product lifecycle status: the SS34 R7 is discontinued, while the SS34H is actively manufactured and supported. The SS34H's automotive qualification provides additional quality assurance for applications requiring enhanced reliability documentation.

Frequently Asked Questions (FAQ)

Q: Can the SS34H directly replace the SS34 R7 in existing designs?

A: Yes. The SS34H is electrically and mechanically equivalent to the SS34 R7 across all specified parameters. Both components feature identical 40 V reverse voltage rating, 3 A current capacity, 500 mV forward voltage drop, and DO-214AB surface mount packaging. Direct substitution is supported without circuit modification.

Q: What is the difference between SS34 R7 and SS34H packaging?

A: The SS34 R7 is supplied in standard packaging configuration. The SS34H is supplied in Tape & Reel (TR) format, which is the standard automated assembly packaging for surface mount components. Both use the identical DO-214AB (SMC) physical package. Tape & Reel packaging is standard for production environments and does not affect component performance or board-level compatibility.

Q: Are there compliance or certification differences between these parts?

A: Both parts meet ROHS3 compliance and carry MSL 1 (Unlimited) moisture sensitivity rating. The SS34H includes automotive-grade qualification (AEC-Q101), which provides additional quality and reliability documentation. This qualification does not restrict use in non-automotive applications; it indicates the part meets enhanced automotive industry standards.

Q: What is the inventory status for these parts?

A: The SS34 R7 is discontinued at DiGi Electronics with 760 pieces listed as new original stock. The SS34H is an active product with 673 pieces currently in stock. For ongoing procurement requirements, the SS34H is the recommended selection due to active manufacturing status.

Q: Do these parts have identical thermal characteristics?

A: Yes. Both the SS34 R7 and SS34H operate across the same junction temperature range of -55°C to 125°C. Thermal performance and operating limits are equivalent between the two parts.

Q: Is the SS34H suitable for high-frequency switching applications?

A: Both parts feature fast recovery switching characteristics rated at ≤ 500ns for currents exceeding 200mA, making them suitable for applications requiring rapid diode turn-off. The electrical specifications are identical between the SS34 R7 and SS34H.