TPC22HM3/87A Equivalent & Substitute Parts

Part Overview

The TPC22HM3/87A is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This component is designed for transient overvoltage protection in automotive applications, featuring a 17.8V reverse standoff voltage and 31.9V maximum clamping voltage. The part is classified as obsolete, necessitating identification of active equivalent components to maintain design continuity and ensure supply chain availability for new production and field service requirements.

Substiute Parts

TPC22HM3/87A

Vishay General Semiconductor - Diodes DivisionIn Stock: 791TPC22HM3/87A Datasheet

Current PartRFQ

TPC22AHM3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 776TPC22AHM3_A/I Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TPC22HM3/87A is determined by strict equivalence across the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Unidirectional channel configuration (1 channel required)
• Reverse standoff voltage within acceptable tolerance of 17.8V nominal
• Breakdown voltage minimum within acceptable tolerance of 19.8V nominal
• Clamping voltage maximum within acceptable tolerance of 31.9V nominal
• Peak pulse current capability minimum of 47A at 10/1000µs pulse width
• Peak pulse power rating of 1500W minimum
• Operating temperature range of -65°C to 185°C (TJ)

Mechanical & Compliance Criteria:

• Surface mount mounting type
• TO-277A (SMPC) package compatibility
• Automotive grade classification
• AEC-Q101 qualification
• ROHS3 compliance
• MSL 1 rating

The substitute part TPC22AHM3_A/I meets all specified criteria while offering active product status and improved availability.

Parameter Comparison

Engineering Selection Recommendations

The TPC22AHM3_A/I is a direct functional equivalent to the obsolete TPC22HM3/87A. Both components share identical automotive grade classification, AEC-Q101 qualification, and ROHS3 compliance status. The substitute part maintains the same operating temperature range, peak pulse power rating, and package configuration.

Parameter variations between the two parts fall within acceptable engineering tolerances for TVS diode applications:

• Reverse standoff voltage increases from 17.8V to 18.8V (5.6% increase)
• Breakdown voltage minimum increases from 19.8V to 20.9V (5.6% increase)
• Clamping voltage maximum decreases from 31.9V to 30.6V (4.1% decrease)
• Peak pulse current increases from 47A to 49A (4.3% increase)

The TPC22AHM3_A/I offers superior availability as an active product with current manufacturing status and established supply chain presence. Selection of this substitute part is appropriate for new designs and field service applications requiring equivalent transient voltage suppression performance.

Frequently Asked Questions (FAQ)

Q: Can TPC22AHM3_A/I be used as a direct replacement for TPC22HM3/87A in existing designs?

A: Yes. Both parts are unidirectional TVS diodes with identical package configuration (TO-277A SMPC), mounting type (surface mount), and automotive qualification (AEC-Q101). Electrical parameters are within acceptable tolerance ranges for TVS diode applications. No circuit redesign is required.

Q: What are the key differences between these two parts?

A: The substitute part features a slightly higher reverse standoff voltage (18.8V vs 17.8V), higher breakdown voltage minimum (20.9V vs 19.8V), lower clamping voltage maximum (30.6V vs 31.9V), and marginally higher peak pulse current capability (49A vs 47A). These variations are typical within the same TVS diode product family and do not affect functional compatibility.

Q: Are both parts suitable for automotive applications?

A: Yes. Both the TPC22HM3/87A and TPC22AHM3_A/I carry automotive grade classification and AEC-Q101 qualification, confirming suitability for automotive transient voltage suppression applications.

Q: What is the significance of the product status difference?

A: The TPC22HM3/87A is classified as obsolete, indicating discontinued manufacturing. The TPC22AHM3_A/I maintains active product status with ongoing production and supply availability. For new production and long-term field service support, the active substitute part is the appropriate selection.

Q: Are the packaging and moisture sensitivity specifications identical?

A: Yes. Both parts use TO-277A (SMPC) package configuration and carry MSL 1 (Unlimited) moisture sensitivity rating, confirming identical handling and storage requirements.

Q: Do both parts meet the same compliance standards?

A: Yes. Both components are ROHS3 compliant and carry identical environmental and regulatory compliance status, including REACH unaffected classification and EAR99 ECCN designation.