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Vishay General Semiconductor - Diodes Division 5KASMC26AHM3_A/H
- Part No.:
- 5KASMC26AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
5KASMC26AHM3_A/H.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,541
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Product details
Overview
5KASMC26AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, rated for 26 V stand-off voltage (VWM), 30.4 V nominal breakdown (VBR), 5000 W peak pulse power (10/1000 μs), 118.8 V clamping voltage at 42.1 A surge current, and qualified to AEC-Q101 for automotive electronics protection.
For engineers reviewing the 5KASMC26AHM3_A/H datasheet, 5KASMC26AHM3_A/H pinout, 5KASMC26AHM3_A/H application, or 5KASMC26AHM3_A/H equivalent, key selection criteria include clamping performance under 10/1000 μs transients, TJ = 185 °C junction rating, MSL Level 1 reflow compatibility, halogen-free RoHS compliance, and unidirectional polarity for DC rail protection.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology optimized for high-temperature stability and low incremental surge resistance. It delivers fast response time and excellent clamping capability with a maximum clamping voltage of 118.8 V at 42.1 A IPPM, enabling robust protection of downstream MOSFETs and ICs against inductive switching transients.
Designed for automotive-grade reliability, the 5KASMC26AHM3_A/H operates across -65 °C to +185 °C junction temperature range, meets JESD201 Class 2 whisker test requirements, and is rated for 5000 W peak pulse power per 10/1000 μs waveform - validated under non-repetitive surge conditions with derating above TA = 25 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (nom) | 30.4 V at 1 mA - precise breakdown threshold ensuring reliable turn-on during overvoltage events |
| VC @ IPPM | 118.8 V at 42.1 A - clamping voltage limiting stress on protected circuitry during 10/1000 μs surge |
| PPPM | 5000 W - peak pulse power handling capacity for transient suppression without failure |
| TJ max | +185 °C - extended junction temperature rating supporting under-hood automotive applications |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 0.320" x 0.246" footprint and cathode band marking |
| AEC-Q101 | Qualified - certified for automotive electronic systems requiring high reliability and stress testing compliance |
Pinout & Package
Package: SMC (DO-214AB), molded epoxy case meeting UL 94 V-0 flammability rating; matte tin-plated leads solderable per J-STD-002 and JESD22-B102; cathode denoted by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during clamping | Connected to ground or low-side reference; completes conduction path when reverse voltage exceeds VBR |
| Cathode | Current exit terminal during clamping | Connected to protected line (e.g., 24 V rail); color band identifies this terminal for correct PCB orientation |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier design ensures stable VBR and low leakage (<2 μA at VWM) over lifetime and temperature |
| High-temperature operation | TJ = 185 °C rating enables use in engine control units and powertrain modules without thermal derating penalties |
| Peak pulse power | 5000 W (10/1000 μs) supports suppression of severe load-dump and ISO 7637-2 Pulse 5a transients |
| Low clamping ratio | VC/VBR ≈ 3.91 - tight clamping margin preserves safe operating area for sensitive 30 V-rated components |
| Halogen-free & RoHS | HM3 suffix confirms compliance with environmental standards and AEC-Q101 qualification for automotive supply chains |
Applications
| Automotive Power Distribution | Industrial Motor Drive Protection |
|---|---|
Use Scenario: Protecting 24 V supply rails in body control modules against load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery input and DC-DC converter input stage. Use Value: Limits transient voltage to ≤118.8 V, preventing damage to 30 V-rated buck controllers and gate drivers. |
Use Scenario: Safeguarding IGBT gate drivers in variable-frequency drives exposed to inductive kickback. IC Role / Device Role / Timing Role: Parallel-connected TVS absorbing flyback energy from relay coils and motor windings. Use Value: Fast response and low RSURGE ensure clamping within nanoseconds, avoiding gate oxide overstress. |
| Automotive Sensor Interface | Telecom DC Power Input |
Use Scenario: Shielding LIN bus transceivers and Hall-effect sensors from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS on signal lines adjacent to microcontroller I/O pins. Use Value: Maintains signal integrity with minimal parasitic capacitance while meeting ISO 10605 30 kV air discharge immunity. |
Use Scenario: Front-end protection for PoE-powered network switches subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Primary-level TVS on 48 V DC input before DC-DC isolation stage. Use Value: 5000 W rating handles multi-kA induced surges per IEC 61000-4-5 Level 4 without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ26A | Lower PPPM (600 W), smaller SMB package (DO-214AA), same VWM/VBR range | Limited to lower-energy transients; unsuitable for load dump or ISO 7637-2 Pulse 5a | Select when board space is constrained and surge energy remains below 100 mJ |
| 5.0SMDJ26A | Same 5000 W rating but larger SMC-like package (DO-214AB equivalent), higher IR leakage (5 μA vs. 2 μA) | Compatible footprint but requires verification of thermal relief pad layout due to higher RθJA | Prefer when legacy 5.0SMDJ footprint reuse is required and leakage sensitivity is low |
Compared with SMBJ26A and 5.0SMDJ26A, the 5KASMC26AHM3_A/H delivers superior thermal robustness (TJ = 185 °C), tighter leakage control (≤2 μA), and guaranteed AEC-Q101 qualification - making it the preferred choice for new automotive designs requiring long-term reliability under high ambient temperatures.
Availability
5KASMC26AHM3_A/H is available at Aetrix Electronics and suitable for automotive power distribution, industrial motor drive protection, automotive sensor interface, and telecom DC power input applications requiring stable component supply, AEC-Q101 compliance, and high-temperature operational assurance.
Supply support for 5KASMC26AHM3_A/H includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, TVS devices, and optoelectronics with emphasis on high-reliability and automotive-grade solutions.
The 5KASMCxxA series was engineered specifically for demanding automotive and industrial environments, delivering high-temperature stability, AEC-Q101 qualification, and 5000 W transient suppression in compact SMC packaging.
FAQ
What is the maximum clamping voltage of the 5KASMC26AHM3_A/H under a 10/1000 μs surge?
The 5KASMC26AHM3_A/H has a maximum clamping voltage (VC) of 118.8 V at 42.1 A peak pulse current (IPPM) under a 10/1000 μs waveform. This value is measured per Figure 1 in the Vishay datasheet 89432 and defines the upper voltage limit imposed on protected circuitry during standardized surge events. The 5KASMC26AHM3_A/H maintains this clamping performance across its full operating temperature range.
Is the 5KASMC26AHM3_A/H suitable for automotive under-hood applications?
Yes, the 5KASMC26AHM3_A/H is explicitly qualified to AEC-Q101 and rated for a maximum junction temperature of +185 °C, making it suitable for under-hood automotive applications such as engine control units, transmission control modules, and body control modules. Its passivated anisotropic rectifier structure ensures stable VBR and low leakage even after prolonged exposure to high ambient temperatures.
What does the "HM3_A/H" suffix indicate in 5KASMC26AHM3_A/H?
The "HM3_A/H" suffix denotes a halogen-free, RoHS-compliant version qualified to AEC-Q101, packaged in 7-inch plastic tape and reel with 850 units per reel. The "HM3" base code confirms compliance with JESD201 Class 2 whisker testing, while "A" is the revision code and "H" specifies the preferred package code per Vishay's ordering information table in document 89432.
How does the thermal resistance of the 5KASMC26AHM3_A/H affect PCB layout?
The 5KASMC26AHM3_A/H has a typical junction-to-mount thermal resistance (RθJM) of 20.8 °C/W, meaning effective heat transfer depends on proper copper pad area and thermal vias beneath the SMC package. Vishay recommends using the minimum recommended mounting pad layout shown in Figure 4 of datasheet 89432 to maintain thermal performance and avoid exceeding TJ = 185 °C during repetitive surge events.
Does the 5KASMC26AHM3_A/H support bidirectional transient suppression?
No, the 5KASMC26AHM3_A/H is unidirectional only, as confirmed in the FEATURES section of Vishay document 89432. It protects against positive transients on the cathode side relative to anode (i.e., reverse-biased operation). For bidirectional protection, a separate device such as the 5KASMC26CA or dual-diode configuration would be required - the 5KASMC26AHM3_A/H is not rated or characterized for symmetrical clamping.
5KASMC26AHM3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 26V
- Voltage - Breakdown (Min):
- 28.9V
- Voltage - Clamping (Max) @ Ipp:
- 42.1V
- Current - Peak Pulse (10/1000µs):
- 118.8A
- Power - Peak Pulse:
- 5000W (5kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 185°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
5KASMC26AHM3_A/H FAQ
1.How can I place an order for 5KASMC26AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 5KASMC26AHM3_A/H on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 5KASMC26AHM3_A/H reliable?
The price and inventory of 5KASMC26AHM3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 5KASMC26AHM3_A/H is usually 5 days.
3.What payment methods are accepted for 5KASMC26AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 5KASMC26AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 5KASMC26AHM3_A/H?
5KASMC26AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 5KASMC26AHM3_A/H order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 5KASMC26AHM3_A/H?
For technical support, including 5KASMC26AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 5KASMC26AHM3_A/H requirements.
6.How does Aetrix verify that 5KASMC26AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All 5KASMC26AHM3_A/H products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 5KASMC26AHM3_A/H meets industry standards.
7.What is the process for return or replacement of 5KASMC26AHM3_A/H?
All 5KASMC26AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 5KASMC26AHM3_A/H, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 5KASMC26AHM3_A/H part is unused and in its original packaging.
Return procedure for 5KASMC26AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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