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TPSMC12HE3_A/I Equivalent & Substitute Parts
Part Overview
The TPSMC12HE3_A/I is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This component is designed for surface mount applications in the DO-214AB (SMC) package and provides transient overvoltage protection with a 9.72V reverse standoff voltage and 17.3V maximum clamping voltage. The part is classified as Obsolete, making identification of suitable substitute components necessary for ongoing design support and procurement.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - Reverse Standoff (Typ) | 9.72 | V |
| Voltage - Breakdown (Min) | 10.8 | V |
| Voltage - Clamping (Max) @ Ipp | 17.3 | V |
| Current - Peak Pulse (10/1000µs) | 86.7 | A |
| Power - Peak Pulse | 1500 | W |
| Operating Temperature Range | -65 to 185 | °C (TJ) |
| Package / Case | DO-214AB (SMC) | — |
| Grade | Automotive | — |
| Qualification | AEC-Q101 | — |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitution of the TPSMC12HE3_A/I is determined by the following critical electrical and mechanical parameters:
- Package Compatibility: Both parts must use DO-214AB (SMC) surface mount package for PCB layout compatibility
- Voltage Rating Alignment: Reverse standoff voltage, breakdown voltage, and clamping voltage must fall within acceptable operating ranges for the protected circuit
- Current Handling: Peak pulse current rating must meet or exceed the transient protection requirements
- Power Dissipation: Peak pulse power rating must support the expected transient energy
- Temperature Range: Operating temperature specification must cover the application environment
- Automotive Grade & Certification: AEC-Q101 qualification ensures reliability in automotive applications
- RoHS Compliance: ROHS3 compliance is required for regulatory conformance
The TPSMC12AHE3_B/I qualifies as a direct substitute based on these parameters while offering Active product status.
Parameter Comparison
| Parameter | TPSMC12HE3_A/I (Main) | TPSMC12AHE3_B/I (Substitute) | Compatibility |
|---|---|---|---|
| Voltage - Reverse Standoff (Typ) | 9.72 V | 10.2 V | Compatible |
| Voltage - Breakdown (Min) | 10.8 V | 11.4 V | Compatible |
| Voltage - Clamping (Max) @ Ipp | 17.3 V | 16.7 V | Compatible |
| Current - Peak Pulse (10/1000µs) | 86.7 A | 89.8 A | Compatible |
| Power - Peak Pulse | 1500 W | 1500 W | Compatible |
| Operating Temperature Range | -65 to 185 °C (TJ) | -65 to 185 °C (TJ) | Compatible |
| Package / Case | DO-214AB (SMC) | DO-214AB (SMC) | Compatible |
| Grade | Automotive | Automotive | Compatible |
| Qualification | AEC-Q101 | AEC-Q101 | Compatible |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | Compatible |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) | Compatible |
| Product Status | Obsolete | Active | Upgrade Available |
Engineering Selection Recommendations
The TPSMC12AHE3_B/I is the qualified substitute for the obsolete TPSMC12HE3_A/I. Selection is based on the following engineering criteria:
- Product Status: The substitute maintains Active product status, ensuring long-term availability and manufacturing support compared to the Obsolete main part
- Compliance & Certification: Both parts carry AEC-Q101 automotive qualification and ROHS3 compliance, meeting regulatory requirements for automotive applications
- Electrical Performance: The substitute demonstrates equivalent or superior electrical characteristics across all critical parameters, including voltage ratings, current handling, and power dissipation
- Package Compatibility: Identical DO-214AB (SMC) package ensures direct PCB layout compatibility without redesign
- Thermal & Environmental: Matching operating temperature range and MSL rating confirm suitability for equivalent environmental conditions
Frequently Asked Questions (FAQ)
Q: Can TPSMC12AHE3_B/I be used as a direct replacement for TPSMC12HE3_A/I?
A: Yes. Both parts share identical package geometry (DO-214AB/SMC), matching operating temperature ranges, and equivalent electrical performance within the specified parameters. The substitute is electrically and mechanically compatible for direct substitution.
Q: What are the key differences between these parts?
A: The primary differences are product status and minor voltage parameter variations. TPSMC12AHE3_B/I is Active (versus Obsolete), has a slightly higher reverse standoff voltage (10.2V vs. 9.72V), and a marginally lower clamping voltage (16.7V vs. 17.3V). These variations remain within acceptable substitution tolerances for TVS diode applications.
Q: Are there packaging differences?
A: The main part is supplied in standard packaging, while the substitute is available in Tape & Reel (TR) format. Both use the same DO-214AB (SMC) component package, ensuring identical PCB footprint and mounting compatibility.
Q: Do both parts meet automotive standards?
A: Yes. Both TPSMC12HE3_A/I and TPSMC12AHE3_B/I carry Automotive grade classification and AEC-Q101 qualification, confirming suitability for automotive transient protection applications.
Q: Is RoHS compliance maintained with the substitute?
A: Yes. Both parts are ROHS3 compliant, meeting environmental and regulatory requirements for electronic component manufacturing and use.
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