SM15T220AHM3/H Equivalent & Substitute Parts

Part Overview

The SM15T220AHM3/H is a unidirectional Transient Voltage Suppressor (TVS) diode from Vishay General Semiconductor - Diodes Division, designed for transient overvoltage protection in automotive applications. This component operates with a reverse standoff voltage of 188V and provides clamping at 328V maximum, with a peak pulse current rating of 4.6A. The part is currently discontinued at DiGi Electronics, making identification of equivalent substitute parts essential for ongoing design support and procurement.

Substiute Parts

SM15T220AHM3/H

Vishay General Semiconductor - Diodes DivisionIn Stock: 985SM15T220AHM3/H Datasheet

Current PartRFQ

SM15T220AHM3_A/H

Vishay General Semiconductor - Diodes DivisionIn Stock: 802SM15T220AHM3_A/H Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SM15T220AHM3/H is determined by strict equivalence across the following critical parameters:

• Voltage - Reverse Standoff (Typ): 188V
• Voltage - Breakdown (Min): 209V
• Voltage - Clamping (Max) @ Ipp: 328V
• Current - Peak Pulse (10/1000µs): 4.6A
• Power - Peak Pulse: 1500W
• Package / Case: DO-214AB (SMC)
• Unidirectional Channels: 1
• Type: Zener
• Operating Temperature Range: -65°C ~ 150°C (TJ)
• Automotive Grade and AEC-Q101 Qualification

The substitute part SM15T220AHM3_A/H maintains identical electrical specifications and mechanical compatibility, differing only in product status (Active vs. Discontinued) and inventory availability.

Parameter Comparison

Engineering Selection Recommendations

The SM15T220AHM3_A/H serves as a direct functional equivalent to the SM15T220AHM3/H. Both components are manufactured by Vishay General Semiconductor - Diodes Division and maintain identical electrical and mechanical specifications. The primary distinction is product status: the original part number is discontinued at DiGi Electronics, while the substitute part number remains in active production status.

For new designs or ongoing procurement, the SM15T220AHM3_A/H is the appropriate selection due to its active product status and continued availability. Both parts satisfy automotive-grade requirements with AEC-Q101 qualification and ROHS3 compliance, ensuring regulatory and quality standards are maintained across substitution.

Frequently Asked Questions (FAQ)

Q: Can SM15T220AHM3_A/H be used as a direct replacement for SM15T220AHM3/H?

A: Yes. Both parts are electrically and mechanically identical, with matching voltage ratings (188V reverse standoff, 328V clamping), current specifications (4.6A peak pulse), power dissipation (1500W), and package configuration (DO-214AB SMC). The substitute part is the active production equivalent.

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

A: The SM15T220AHM3_A/H is the active production variant of the discontinued SM15T220AHM3/H. All electrical parameters, thermal ratings, automotive qualifications, and compliance certifications are identical. The underscore notation in the substitute part number indicates a production variant designation.

Q: Are both parts suitable for automotive applications?

A: Yes. Both the SM15T220AHM3/H and SM15T220AHM3_A/H carry automotive-grade classification with AEC-Q101 qualification, confirming suitability for automotive transient voltage suppression applications.

Q: What is the operating temperature range for these TVS diodes?

A: Both parts operate across -65°C to 150°C junction temperature (TJ), meeting automotive environmental requirements.

Q: Are there any compliance or regulatory differences between the two parts?

A: No. Both parts are ROHS3 compliant, REACH unaffected, and carry identical moisture sensitivity level (MSL 1 - Unlimited), ensuring equivalent compliance status for procurement and assembly.

Q: What package type is used for these TVS diodes?

A: Both parts use the DO-214AB (SMC) surface mount package, enabling direct PCB substitution without layout modifications.