SMAJ30A-M3/61 Equivalent & Substitute Parts

Part Overview

The SMAJ30A-M3/61 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the 30V reverse standoff category and is designed for general-purpose transient protection applications. The part is active in production status with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Equivalent and substitute parts are identified based on matching electrical characteristics and mechanical compatibility within the DO-214AC (SMA) package form factor. Alternative sources and packaging configurations are available to support supply chain flexibility and inventory optimization.

Substiute Parts

SMAJ30A-M3/61

Vishay General Semiconductor - Diodes DivisionIn Stock: 892SMAJ30A-M3/61 Datasheet

Current PartRFQ

SMAJ30A-E3/5A

Vishay General Semiconductor - Diodes DivisionIn Stock: 5469SMAJ30A-E3/5A Datasheet

DirectRFQ

SMAJ30A

MDDIn Stock: 28337SMAJ30A Datasheet

DirectRFQ

SMAJ30A-13-F

Diodes IncorporatedIn Stock: 17633SMAJ30A-13-F Datasheet

DirectRFQ

SMAJ30A-TP

Micro Commercial CoIn Stock: 4659SMAJ30A-TP Datasheet

DirectRFQ

SZ1SMA30AT3G

Littelfuse Inc.In Stock: 6879SZ1SMA30AT3G Datasheet

DirectRFQ

SM4T35AY

STMicroelectronicsIn Stock: 1213SM4T35AY Datasheet

MFR RecommendedRFQ

SMAJ30A-TR

STMicroelectronicsIn Stock: 4331SMAJ30A-TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMAJ30A-M3/61 are classified based on strict electrical parameter matching and mechanical compatibility. The primary substitution criteria are:

Core Electrical Parameters (Must Match):

• Voltage - Reverse Standoff (Typ): 30V
• Voltage - Breakdown (Min): 33.3V
• Voltage - Clamping (Max) @ Ipp: 48.4V
• Current - Peak Pulse (10/1000µs): 8.3A
• Power - Peak Pulse: 400W
• Package / Case: DO-214AC, SMA

Acceptable Variations:

• Packaging configuration (Tape & Reel, Cut Tape, Digi-Reel)
• Operating temperature range (within -55°C to 150°C minimum)
• Manufacturer source (Vishay, Diodes Incorporated, MDD, Micro Commercial Co, Littelfuse, STMicroelectronics)
• Series designation and product line naming

Parts that deviate from the core electrical parameters are listed separately as MFR Recommended alternatives with documented parameter differences.

Parameter Comparison

Engineering Selection Recommendations

Direct Substitutes (Electrical Parameters Match):

The following parts are direct substitutes for SMAJ30A-M3/61 with identical electrical specifications:

• SMAJ30A-E3/5A (Vishay) — Higher inventory availability (5387 pcs)
• SMAJ30A-13-F (Diodes Incorporated) — Cut Tape packaging option (17605 pcs)
• SMAJ30A-TP (Micro Commercial Co) — Extended operating temperature to 175°C (4550 pcs)
• SZ1SMA30AT3G (Littelfuse) — Automotive grade with AEC-Q101 qualification, extended low-temperature rating to -65°C (6840 pcs)
• SMAJ30A (MDD) — Largest inventory availability (28300 pcs), minimum operating temperature -50°C

All direct substitutes maintain ROHS3 compliance, MSL 1 rating, and surface mount DO-214AC (SMA) package compatibility.

MFR Recommended Alternatives (Parameter Deviations):

• SM4T35AY (STMicroelectronics) — Clamping voltage increased to 64.3V, peak pulse current increased to 36A (8/20µs). Automotive grade with AEC-Q101 qualification. Use only when higher current handling and clamping voltage are acceptable for the application.
• SMAJ30A-TR (STMicroelectronics) — Identical parameter deviations to SM4T35AY. Cut Tape packaging configuration.

Selection Criteria:

• For standard applications with standard temperature range: SMAJ30A-E3/5A or SMAJ30A-13-F
• For extended temperature operation: SMAJ30A-TP (high temperature) or SZ1SMA30AT3G (low temperature)
• For automotive applications: SZ1SMA30AT3G or SM4T35AY/SMAJ30A-TR (with parameter verification)
• For maximum inventory availability: SMAJ30A (MDD)

Frequently Asked Questions (FAQ)

Q: Can SMAJ30A-E3/5A be used as a direct replacement for SMAJ30A-M3/61?

A: Yes. Both parts share identical electrical parameters (30V standoff, 48.4V clamping, 8.3A peak pulse current, 400W power dissipation) and the same DO-214AC (SMA) package. The difference is packaging configuration (both Tape & Reel) and manufacturer source (both Vishay). No circuit modifications are required.

Q: What is the difference between SMAJ30A-13-F and SMAJ30A-M3/61?

A: Electrical specifications are identical. SMAJ30A-13-F is supplied in Cut Tape (CT) & Digi-Reel® packaging by Diodes Incorporated, while SMAJ30A-M3/61 is supplied in Tape & Reel by Vishay. Both are surface mount DO-214AC (SMA) components suitable for automated assembly.

Q: Can SM4T35AY replace SMAJ30A-M3/61?

A: SM4T35AY maintains the same 30V reverse standoff voltage and 400W power rating but differs in clamping voltage (64.3V vs 48.4V) and peak pulse current (36A vs 8.3A). This part is suitable only if the application can tolerate higher clamping voltage and the circuit is designed for higher current transient events. Verification against circuit requirements is necessary.

Q: Is SZ1SMA30AT3G suitable for automotive applications?

A: Yes. SZ1SMA30AT3G carries automotive grade designation with AEC-Q101 qualification. It maintains identical electrical parameters to SMAJ30A-M3/61 and extends the operating temperature range to -65°C. It is suitable for automotive transient protection circuits.

Q: What is the difference between Tape & Reel and Cut Tape packaging?

A: Both are surface mount delivery formats. Tape & Reel (TR) is supplied on continuous reel for high-volume automated assembly. Cut Tape (CT) & Digi-Reel® is supplied in shorter tape segments for lower-volume or mixed-component assembly. Electrical performance and package form factor (DO-214AC, SMA) are identical.

Q: Does SMAJ30A (MDD) have any temperature limitations compared to SMAJ30A-M3/61?

A: SMAJ30A (MDD) specifies a minimum operating temperature of -50°C versus -55°C for SMAJ30A-M3/61. For applications requiring operation below -50°C, SMAJ30A-M3/61 or SZ1SMA30AT3G (-65°C minimum) are required.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL 1 (unlimited) moisture sensitivity rating, matching the environmental and regulatory status of SMAJ30A-M3/61.