SMCG12A-M3/9AT Equivalent & Substitute Parts

Part Overview

The SMCG12A-M3/9AT is a unidirectional Transient Voltage Suppressor (TVS) diode from Vishay General Semiconductor - Diodes Division, part of the TransZorb® series. This surface mount component is designed for general-purpose transient voltage protection applications. The device is currently in active production status and is ROHS3 compliant. Identifying equivalent substitute parts is necessary to ensure supply chain flexibility, manage inventory across multiple procurement channels, and maintain design continuity when the primary part number becomes unavailable.

Substiute Parts

SMCG12A-M3/9AT

Vishay General Semiconductor - Diodes DivisionIn Stock: 1005SMCG12A-M3/9AT Datasheet

Current PartRFQ

SMCG12A-E3/57T

Vishay General Semiconductor - Diodes DivisionIn Stock: 1365SMCG12A-E3/57T Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SMCG12A-M3/9AT is determined by strict equivalence across the following critical parameters:

• Manufacturer: Vishay General Semiconductor - Diodes Division
• Series: TransZorb®
• Type: Zener, Unidirectional
• Voltage - Reverse Standoff (Typ): 12V
• Voltage - Breakdown (Min): 13.3V
• Voltage - Clamping (Max) @ Ipp: 19.9V
• Current - Peak Pulse (10/1000µs): 75.4A
• Power - Peak Pulse: 1500W
• Package / Case: DO-215AB, SMC Gull Wing
• Mounting Type: Surface Mount

The substitute part SMCG12A-E3/57T meets all of these criteria. The difference between the main part and substitute lies only in the tape and reel configuration (packaging variant), which does not affect electrical performance or mechanical compatibility in the application circuit.

Parameter Comparison

Engineering Selection Recommendations

Both the SMCG12A-M3/9AT and SMCG12A-E3/57T are active production components from Vishay General Semiconductor - Diodes Division. Both parts maintain identical electrical specifications, thermal performance, and mechanical compatibility. Both are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component manufacturing and distribution.

Selection between these parts should be based on procurement availability and tape and reel configuration requirements for automated assembly processes. The SMCG12A-E3/57T currently maintains higher inventory availability (1320 Pcs) compared to the SMCG12A-M3/9AT (950 Pcs), which may influence supply chain decisions.

Frequently Asked Questions (FAQ)

Q: Can SMCG12A-E3/57T be used as a direct replacement for SMCG12A-M3/9AT in existing designs?

A: Yes. Both parts are electrically and mechanically identical. The only difference is the tape and reel packaging configuration, which does not affect circuit performance or PCB assembly compatibility.

Q: What is the difference between the part numbers SMCG12A-M3/9AT and SMCG12A-E3/57T?

A: The suffix designations (M3/9AT versus E3/57T) indicate different tape and reel specifications used for automated component feeding during manufacturing. The base part number SMCG12 and all electrical characteristics remain identical.

Q: Are there any thermal or electrical performance differences between these substitute parts?

A: No. Both parts share identical voltage ratings (12V reverse standoff, 13.3V breakdown minimum, 19.9V clamping maximum), current handling (75.4A peak pulse), power dissipation (1500W), and operating temperature range (-55°C to 150°C).

Q: Do both parts meet the same compliance standards?

A: Yes. Both SMCG12A-M3/9AT and SMCG12A-E3/57T are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity rating.

Q: Which part should be selected for new designs?

A: Either part is suitable for new designs. Selection should be based on component availability from your supplier and the tape and reel configuration required by your assembly equipment.