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5KASMC26AHM3/57 Equivalent & Substitute Parts
Part Overview
The 5KASMC26AHM3/57 is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the DO-214AB (SMC) package and is designed for transient overvoltage protection applications. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for new designs and production continuity.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | 5KASMC26AHM3/57 |
| Manufacturer | Vishay General Semiconductor - Diodes Division |
| Category | Transient Voltage Suppressors (TVS) |
| Type | Zener |
| Unidirectional Channels | 1 |
| Voltage - Reverse Standoff (Typ) | 26V |
| Voltage - Breakdown (Min) | 28.9V |
| Voltage - Clamping (Max) @ Ipp | 42.1V |
| Power - Peak Pulse | 5000W (5kW) |
| Mounting Type | Surface Mount |
| Package / Case | DO-214AB, SMC |
| Operating Temperature | -65°C ~ 185°C (TJ) |
| Grade | Automotive |
| Qualification | AEC-Q101 |
| RoHS Status | ROHS3 Compliant |
| Product Status | Obsolete |
Substitute Part Grouping Explanation
Substitution of the 5KASMC26AHM3/57 is determined by strict electrical and mechanical compatibility criteria:
Critical Parameters for Substitution:
- Voltage - Reverse Standoff (Typ): 26V
- Voltage - Breakdown (Min): 28.9V
- Voltage - Clamping (Max) @ Ipp: 42.1V
- Power - Peak Pulse: 5000W (5kW)
- Unidirectional Channels: 1
- Package / Case: DO-214AB, SMC
- Mounting Type: Surface Mount
Substitute parts are grouped into two categories based on peak pulse current capability:
Category A - Full Power Rating (5000W, 119A Ipp): Parts with complete electrical equivalence including peak pulse current specifications. These include 5KASMC26AHM3_A/H, 5.0SMDJ26A, 5.0SMDJ26A-T7, 5.0SMDJ26AH, 5.0SMDJ26AHM6G, and 5.0SMLJ26A-TP.
Category B - Reduced Power Rating (1500W-3000W, 35.63A-71.26A Ipp): Parts with identical voltage specifications but lower peak pulse power dissipation. These include ATV15C260J-HF (1500W), ATV30C260J-HF (3000W), and ATV50C260J-HF (5000W).
Parameter Comparison
| Part Number | Manufacturer | Voltage - Reverse Standoff (Typ) | Voltage - Breakdown (Min) | Voltage - Clamping (Max) @ Ipp | Current - Peak Pulse (10/1000µs) | Power - Peak Pulse | Operating Temperature | Grade | Qualification | Product Status | Package / Case |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 5KASMC26AHM3/57 | Vishay | 26V | 28.9V | 42.1V | — | 5000W | -65°C ~ 185°C | Automotive | AEC-Q101 | Obsolete | DO-214AB, SMC |
| 5KASMC26AHM3_A/H | Vishay | 26V | 28.9V | 42.1V | 118.8A | 5000W | -65°C ~ 185°C | Automotive | AEC-Q101 | Active | DO-214AB, SMC |
| 5.0SMDJ26A | Taiwan Semiconductor | 26V | 28.9V | 42.1V | 119A | 5000W | -55°C ~ 175°C | — | — | Active | DO-214AB, SMC |
| 5.0SMDJ26A-T7 | Littelfuse | 26V | 28.9V | 42.1V | 119A | 5000W | -65°C ~ 150°C | — | — | Active | DO-214AB, SMC |
| 5.0SMDJ26AH | Taiwan Semiconductor | 26V | 28.9V | 42.1V | 119A | 5000W | -55°C ~ 175°C | — | — | Active | DO-214AB, SMC |
| 5.0SMDJ26AHM6G | Taiwan Semiconductor | 26V | 28.9V | 42.1V | 119A | 5000W | -55°C ~ 175°C | Automotive | AEC-Q101 | Active | DO-214AB, SMC |
| 5.0SMLJ26A-TP | Micro Commercial Co | 26V | 28.9V | 42.1V | 119A | 5000W | -55°C ~ 175°C | — | — | Active | DO-214AB, SMC |
| ATV15C260J-HF | Comchip Technology | 26V | 28.9V | 42.1V | 35.63A | 1500W | -55°C ~ 150°C | Automotive | AEC-Q101 | Active | DO-214AB, SMC |
| ATV30C260J-HF | Comchip Technology | 26V | 28.9V | 42.1V | 71.26A | 3000W | -55°C ~ 150°C | Automotive | AEC-Q101 | Active | DO-214AB, SMC |
| ATV50C260J-HF | Comchip Technology | 26V | 28.9V | 42.1V | 118.8A | 5000W | -55°C ~ 150°C | Automotive | AEC-Q101 | Active | DO-214AB, SMC |
Engineering Selection Recommendations
Primary Recommendation for Automotive Applications: 5.0SMDJ26AHM6G (Taiwan Semiconductor) is the preferred substitute. This part maintains automotive grade qualification (AEC-Q101) and active product status, ensuring long-term supply availability and design continuity. Operating temperature range of -55°C to 175°C covers most automotive thermal environments.
Alternative for Extended Temperature Range: 5KASMC26AHM3_A/H (Vishay) provides the widest operating temperature range (-65°C to 185°C) and maintains the original manufacturer's automotive qualification. This option is suitable for applications requiring extended thermal performance.
Full Power Rating Equivalents: 5.0SMDJ26A, 5.0SMDJ26A-T7, 5.0SMDJ26AH, and 5.0SMLJ26A-TP all provide 5000W peak pulse power with 119A peak pulse current. Selection among these depends on packaging preference (Tape & Reel vs. bulk) and supply chain availability.
Reduced Power Rating Options: ATV15C260J-HF (1500W), ATV30C260J-HF (3000W), and ATV50C260J-HF (5000W) from Comchip Technology maintain automotive AEC-Q101 qualification. These are suitable only for applications where peak pulse power requirements do not exceed their respective ratings.
Frequently Asked Questions (FAQ)
Q: Can I use a substitute part with lower peak pulse power rating? A: Substitution with lower power ratings (ATV15C260J-HF at 1500W or ATV30C260J-HF at 3000W) is permissible only if your application's transient energy does not exceed the substitute part's power dissipation capability. The voltage specifications remain identical. Verify your circuit's peak pulse energy requirements before selecting a reduced-power alternative.
Q: What is the difference between the Vishay 5KASMC26AHM3_A/H and the Taiwan Semiconductor 5.0SMDJ26AHM6G? A: Both parts are electrically equivalent with 26V standoff voltage, 42.1V clamping voltage, and 5000W peak pulse power. The Vishay part extends to -65°C minimum operating temperature versus -55°C for the Taiwan Semiconductor part. The Taiwan Semiconductor part offers higher inventory availability. Both maintain automotive AEC-Q101 qualification.
Q: Are all substitute parts in the same DO-214AB SMC package? A: Yes. All listed substitute parts use the DO-214AB (SMC) surface mount package, ensuring mechanical and footprint compatibility with the original 5KASMC26AHM3/57 design.
Q: Which substitute offers the best supply availability? A: 5.0SMDJ26A from Taiwan Semiconductor reports 18,100 pieces in stock, providing the highest inventory level among all substitutes. 5.0SMDJ26AHM6G (9,758 pieces) and 5.0SMDJ26AH (6,749 pieces) also offer substantial availability.
Q: Can I mix different substitute parts in the same production run? A: All Category A substitutes (5000W, 119A Ipp) are electrically interchangeable and can be used interchangeably in the same circuit. However, maintaining a single part number per production batch is recommended for traceability and quality control purposes.
Q: What is the operating temperature limitation I should consider? A: The original part operates to 185°C junction temperature. Most active substitutes operate to 150°C or 175°C. If your application requires operation above 175°C, the Vishay 5KASMC26AHM3_A/H (185°C) or 5.0SMDJ26A-T7 (150°C minimum, verify thermal requirements) should be evaluated against your specific thermal profile.
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