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TPSMC36AHE3_A/I Equivalent & Substitute Parts
Part Overview
The TPSMC36AHE3_A/I is a unidirectional transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, part of the PAR® series. This surface mount component is designed for transient overvoltage protection in electronic circuits. The part is currently obsolete, with 786 units in stock. Due to its obsolete status, identifying equivalent and substitute parts is essential for ongoing design support, maintenance, and production continuity.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - Reverse Standoff (Typ) | 30.8 | V |
| Voltage - Breakdown (Min) | 34.2 | V |
| Voltage - Clamping (Max) @ Ipp | 49.9 | V |
| Current - Peak Pulse (10/1000µs) | 30.1 | A |
| Power - Peak Pulse | 1500 | W |
| Operating Temperature Range | -65°C to 185°C | TJ |
| Package / Case | DO-214AB, SMC | — |
| Mounting Type | Surface Mount | — |
| Type | Zener | — |
| Unidirectional Channels | 1 | — |
| Grade | Automotive | — |
| Qualification | AEC-Q101 | — |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitution eligibility for the TPSMC36AHE3_A/I is determined by the following critical parameters:
- Voltage - Reverse Standoff (Typ): 30.8V
- Voltage - Breakdown (Min): 34.2V
- Voltage - Clamping (Max) @ Ipp: 49.9V
- Current - Peak Pulse (10/1000µs): 30.1A
- Power - Peak Pulse: 1500W
- Package / Case: DO-214AB, SMC
- Mounting Type: Surface Mount
- Type: Zener, Unidirectional
Substitute parts are grouped into two categories:
Category 1: Direct Electrical & Mechanical Equivalents — Parts matching all critical electrical parameters (voltage standoff, breakdown, clamping, peak current, and power dissipation) and package specifications. These parts are interchangeable without circuit redesign.
Category 2: Functional Equivalents with Parameter Variations — Parts meeting the same voltage standoff and breakdown specifications but with differences in clamping voltage, peak current, or operating temperature range. These require engineering evaluation for specific applications.
Parameter Comparison
| Part Number | Manufacturer | Status | Vwm (Typ) V | Vbr (Min) V | Vc (Max) V | Ipp A | Ppk W | Temp Range °C | Package | AEC-Q101 |
|---|---|---|---|---|---|---|---|---|---|---|
| TPSMC36AHE3_A/I | Vishay | Obsolete | 30.8 | 34.2 | 49.9 | 30.1 | 1500 | -65 to 185 | DO-214AB | Yes |
| 1.5SMC36A-E3/57T | Vishay | Active | 30.8 | 34.2 | 49.9 | 30.1 | 1500 | -65 to 150 | DO-214AB | No |
| 1.5SMC36A-M3/57T | Vishay | Active | 30.8 | 34.2 | 49.9 | 30.1 | 1500 | -65 to 150 | DO-214AB | No |
| 1.5SMC36A-M3/9AT | Vishay | Active | 30.8 | 34.2 | 49.9 | 30.1 | 1500 | -65 to 150 | DO-214AB | No |
| TPSMC36AHE3_B/I | Vishay | Active | 30.8 | 34.2 | 49.9 | 30.1 | 1500 | -65 to 185 | DO-214AB | Yes |
| SM15T36AY | STMicroelectronics | Active | 30.8 | 34.2 | 64.3 | 156 | 1500 | -40 to 150 | DO-214AB | Yes |
| SMCJ33A | MDD | Active | 33 | 36.7 | 53.3 | 28.2 | 1500 | -50 to 150 | DO-214AB | No |
| SZ1.5SMC36AT3G | Littelfuse | Active | 30.8 | 34.2 | 49.9 | 30 | 1500 | -65 to 150 | DO-214AB | Yes |
| TPSMC36A | Littelfuse | Active | 30.8 | 34.2 | 49.9 | 30.5 | 1500 | -55 to 150 | DO-214AB | Yes |
Engineering Selection Recommendations
Primary Recommendation: TPSMC36AHE3_B/I
The TPSMC36AHE3_B/I is the direct successor to the obsolete TPSMC36AHE3_A/I. Both parts are manufactured by Vishay, share identical electrical specifications, and maintain the same operating temperature range (-65°C to 185°C). Both carry AEC-Q101 automotive qualification. This part is currently active with 911 units in stock and represents the lowest-risk substitution path.
Secondary Recommendations: SZ1.5SMC36AT3G and TPSMC36A
Both SZ1.5SMC36AT3G (Littelfuse) and TPSMC36A (Littelfuse) match the critical electrical parameters of the original part with peak pulse current specifications within 0.5A of the original 30.1A. Both carry AEC-Q101 qualification. The primary consideration is the reduced operating temperature range (-65°C to 150°C versus -65°C to 185°C), which is acceptable for applications not requiring the extended upper temperature capability.
Tertiary Recommendations: 1.5SMC36A Series (Vishay)
The 1.5SMC36A-E3/57T, 1.5SMC36A-M3/57T, and 1.5SMC36A-M3/9AT variants are active Vishay products with matching electrical specifications. These parts operate at -65°C to 150°C and lack AEC-Q101 qualification. Selection of these parts is appropriate for non-automotive applications or where the reduced temperature range is acceptable.
Alternative Consideration: SM15T36AY
The SM15T36AY (STMicroelectronics) maintains the same voltage standoff and breakdown specifications but exhibits higher clamping voltage (64.3V versus 49.9V) and significantly higher peak pulse current (156A versus 30.1A). This part is suitable only for applications where higher transient energy absorption is required and circuit design can accommodate the higher clamping voltage. Operating temperature range is -40°C to 150°C.
Not Recommended: SMCJ33A
The SMCJ33A (MDD) deviates from the original specifications with a higher voltage standoff (33V versus 30.8V) and different clamping characteristics. This part does not meet the electrical requirements for direct substitution.
Frequently Asked Questions (FAQ)
Q: Can I use TPSMC36AHE3_B/I as a direct replacement for TPSMC36AHE3_A/I?
A: Yes. Both parts are manufactured by Vishay with identical electrical specifications, the same DO-214AB package, and matching AEC-Q101 qualification. The TPSMC36AHE3_B/I is the active production equivalent and requires no circuit modifications.
Q: What is the difference between the Vishay 1.5SMC36A series and the original TPSMC36AHE3_A/I?
A: The 1.5SMC36A variants match the electrical specifications but operate at a reduced maximum temperature of 150°C instead of 185°C and do not carry AEC-Q101 qualification. These parts are suitable for general-purpose applications outside automotive environments.
Q: Why does SM15T36AY have different electrical parameters?
A: The SM15T36AY is a higher-performance variant with greater transient energy absorption capability (156A peak pulse current versus 30.1A). The higher clamping voltage (64.3V) reflects this increased capability. This part is suitable only for applications requiring enhanced transient protection and where the circuit design accommodates the higher clamping voltage.
Q: Are all substitute parts in the same package?
A: Yes. All substitute parts listed use the DO-214AB (SMC) surface mount package, ensuring mechanical compatibility with the original design. Packaging variants (Tape & Reel versus bulk) do not affect electrical or mechanical compatibility.
Q: Which substitute part has the best availability?
A: SM15T36AY has the highest inventory at 680,300 units. For direct electrical equivalents, 1.5SMC36A-E3/57T has 33,200 units in stock. TPSMC36AHE3_B/I, the recommended direct replacement, has 911 units available.
Q: Do all substitute parts meet automotive qualification requirements?
A: AEC-Q101 qualification is held by TPSMC36AHE3_B/I, SM15T36AY, SZ1.5SMC36AT3G, and TPSMC36A. The Vishay 1.5SMC36A series and SMCJ33A do not carry this qualification. For automotive applications, select only from the AEC-Q101 qualified parts.
Q: What is the moisture sensitivity level for these parts?
A: All listed parts have MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.
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