SMCJ12AHM3/H Equivalent & Substitute Parts

Part Overview

The SMCJ12AHM3/H is a unidirectional Transient Voltage Suppressor (TVS) diode from Vishay General Semiconductor - Diodes Division, designed for telecom applications requiring transient overvoltage protection. This component features a 12V reverse standoff voltage with a 19.9V maximum clamping voltage and 75.4A peak pulse current capability in a surface mount DO-214AB (SMC) package. The part is AEC-Q101 qualified for automotive-grade reliability and ROHS3 compliant.

The SMCJ12AHM3/H is currently discontinued at DiGi Electronics. Identifying equivalent substitute parts ensures design continuity and maintains supply chain flexibility for applications requiring identical electrical and mechanical specifications.

Substiute Parts

SMCJ12AHM3/H

Vishay General Semiconductor - Diodes DivisionIn Stock: 1059SMCJ12AHM3/H Datasheet

Current PartRFQ

SMCJ12AHM3_A/H

Vishay General Semiconductor - Diodes DivisionIn Stock: 1038SMCJ12AHM3_A/H Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMCJ12AHM3/H is determined by strict equivalence across the following critical parameters:

• Voltage - Reverse Standoff: 12V (nominal)
• Voltage - Clamping: 19.9V (maximum at Ipp)
• Current - Peak Pulse: 75.4A (10/1000µs)
• Power - Peak Pulse: 1500W
• Package: DO-214AB (SMC) surface mount
• Operating Temperature: -55°C to 150°C
• Automotive Grade and AEC-Q101 qualification
• Unidirectional configuration (1 channel)

The SMCJ12AHM3_A/H meets all these criteria and qualifies as a direct substitute. The primary difference is packaging format (Tape & Reel versus bulk) and active product status, which does not affect electrical or mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

The SMCJ12AHM3_A/H is the direct equivalent substitute for the SMCJ12AHM3/H. Both parts share identical electrical specifications, automotive-grade qualification, and AEC-Q101 certification. The SMCJ12AHM3_A/H maintains active product status, ensuring continued availability and supply chain support.

The only functional difference is the packaging format: the substitute is supplied in Tape & Reel format, which is standard for high-volume manufacturing and automated assembly processes. This packaging change does not affect component performance, reliability, or compliance certifications.

For applications requiring the discontinued SMCJ12AHM3/H, the SMCJ12AHM3_A/H provides full electrical and mechanical compatibility with no design modifications required.

Frequently Asked Questions (FAQ)

Q: Are the SMCJ12AHM3/H and SMCJ12AHM3_A/H electrically identical?

A: Yes. Both parts have identical voltage ratings (12V reverse standoff, 19.9V clamping), current ratings (75.4A peak pulse), power dissipation (1500W), and operating temperature range (-55°C to 150°C). They are the same die in the same package.

Q: What is the difference between these two part numbers?

A: The primary difference is packaging format. The SMCJ12AHM3/H is supplied in bulk packaging, while the SMCJ12AHM3_A/H is supplied in Tape & Reel (TR) format. Additionally, the SMCJ12AHM3_A/H maintains active product status, whereas the original part is discontinued.

Q: Can I use the SMCJ12AHM3_A/H as a direct replacement on my PCB?

A: Yes. Both parts use the DO-214AB (SMC) surface mount package with identical pin configuration, footprint, and soldering requirements. No PCB layout modifications are necessary.

Q: Are both parts AEC-Q101 qualified?

A: Yes. Both the SMCJ12AHM3/H and SMCJ12AHM3_A/H carry AEC-Q101 automotive-grade qualification and are suitable for automotive applications.

Q: What is the Moisture Sensitivity Level (MSL) for these parts?

A: Both parts have MSL 1 (Unlimited), indicating no moisture sensitivity concerns and no special storage or handling requirements.

Q: Are these parts ROHS3 compliant?

A: Yes. Both parts are ROHS3 compliant and REACH unaffected, meeting environmental and regulatory requirements.