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Vishay General Semiconductor - Diodes Division 3KASMC26AHM3_A/H
- Part No.:
- 3KASMC26AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC26AHM3_A/H.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,252
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Product details
Overview
3KASMC26AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount PAR® Transient Voltage Suppressor (TVS) diode designed for high-energy surge clamping in automotive and industrial power rails. It delivers 3000 W peak pulse power (10/1000 μs), clamps at 42.1 V under 71.3 A surge current, and operates up to 185 °C junction temperature - enabling robust protection of MOSFETs and ICs against inductive switching transients.
For engineers reviewing the 3KASMC26AHM3_A/H datasheet, 3KASMC26AHM3_A/H pinout, 3KASMC26AHM3_A/H application, or 3KASMC26AHM3_A/H equivalent, this page provides verified electrical specs, DO-214AB package details, AEC-Q101 qualification status, thermal resistance data, and real-world use cases in automotive sensor power lines and industrial motor drives.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology optimized for high-temperature stability and low incremental surge resistance. Its unidirectional polarity and 26 V stand-off voltage (VWM) make it suitable for DC bus protection where reverse conduction must be blocked during normal operation.
The device meets MSL Level 1 per J-STD-020 with 260 °C lead-free reflow capability and is qualified to AEC-Q101 for automotive under-hood applications. Its 18.3 °C/W junction-to-lead thermal resistance supports reliable power dissipation on standard PCB layouts without additional heatsinking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 26 V - maximum continuous reverse voltage before clamping begins; sets operating margin for 24 V automotive systems |
| VBR (Breakdown Voltage) | 28.9–31.9 V at 1 mA - ensures reliable turn-on above normal operating voltage while avoiding false triggering |
| VC (Clamping Voltage) | 42.1 V at 71.3 A (10/1000 μs) - limits transient voltage seen by downstream components to safe levels |
| PPPM (Peak Pulse Power) | 3000 W - handles high-energy surges from inductive load switching without degradation |
| TJ max. | 185 °C - enables deployment in engine control units and under-hood modules without derating |
| RθJL | 18.3 °C/W - allows accurate thermal modeling of power dissipation into PCB copper pads |
| IFSM | 200 A (8.3 ms half-sine) - withstands repetitive surge events in motor drive gate driver circuits |
Pinout & Package
Package: DO-214AB (SMC), RoHS-compliant, matte tin-plated leads, MSL Level 1, JESD 201 Class 2 whisker tested. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to system ground or low-side return path in unidirectional clamp configuration |
| Cathode | Current exit terminal during forward conduction; clamping node | Connected to protected line (e.g., 24 V rail); absorbs surge energy when voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier process ensures stable leakage and breakdown over 15+ year automotive life |
| AEC-Q101 qualification | Validated for automotive under-hood environments including temperature cycling, humidity, and mechanical shock |
| Low RSURGE | Minimizes voltage overshoot during fast transients (<1 ns response time), critical for protecting sensitive gate drivers |
| MSL Level 1 rating | Enables single-pass lead-free reflow at 260 °C without popcorn cracking or delamination |
| UL 94 V-0 molding compound | Prevents flame propagation in enclosed enclosures meeting IEC 60664-1 insulation coordination requirements |
Applications
| Automotive Engine Control Unit (ECU) Power Input | Industrial PLC Digital Output Module |
|---|---|
Use Scenario: Protects 24 V supply input of ECU against load dump and alternator ripple transients per ISO 7637-2. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between battery rail and upstream fuse. Use Value: Clamps 42.1 V at 71.3 A, limiting stress on DC-DC converter input stage and ensuring compliance with AEC-Q100 Grade 0 voltage tolerance. |
Use Scenario: Shields 24 V sinking output transistor from inductive kickback when driving solenoids or relays. IC Role / Device Role / Timing Role: Standoff-clamp TVS connected across output transistor collector-emitter path. Use Value: Absorbs 3000 W surge energy within 10/1000 μs, preventing secondary breakdown of NPN/PNP output switches. |
| Automotive Cabin Sensor Power Line | Telecom Remote Radio Head (RRH) DC Feed |
Use Scenario: Safeguards 5 V/12 V power to radar, camera, and ambient light sensors exposed to ESD and board-level EFT. IC Role / Device Role / Timing Role: Secondary-level TVS placed after primary DC-DC regulator output. Use Value: 1.0 μA leakage at 26 V ensures minimal quiescent current impact on always-on sensor subsystems. |
Use Scenario: Protects 48 V DC feed line to remote antenna units from lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary surge suppression device mounted at RRH enclosure entry point. Use Value: 185 °C TJ max. sustains operation during extended outdoor thermal soak, maintaining clamping integrity above 100 °C ambient. |
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), same VWM/VBR range, DO-214AA (SMB) package (smaller footprint, higher RθJA) | Suitable for space-constrained consumer electronics; not rated for 185 °C or AEC-Q101 | Select when board area is limited and surge energy is ≤600 W; verify thermal performance with RθJA = 110 °C/W |
| SMCJ26A | Same DO-214AB package and 3000 W rating, but only AEC-Q200 qualified (not AEC-Q101), higher IR (5 μA vs. 1 μA) | Acceptable for industrial controls where automotive reliability certification is not mandated | Choose for cost-sensitive industrial designs requiring identical mechanical fit and power rating but without automotive qualification |
Compared with SMBJ26A and SMCJ26A, the 3KASMC26AHM3_A/H uniquely combines AEC-Q101 qualification, 185 °C operation, and 1 μA leakage at VWM - making it the only option qualified for high-reliability automotive power rail protection where thermal and lifetime requirements exceed standard industrial grades.
Availability
3KASMC26AHM3_A/H is available at Aetrix Electronics and suitable for automotive engine control units, industrial programmable logic controllers, telecom remote radio heads, and cabin sensor modules requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 3KASMC26AHM3_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 high-reliability diodes, MOSFETs, and optoelectronics for automotive, industrial, and computing markets.
The 3KASMC series belongs to Vishay's PAR® TVS platform, engineered specifically for high-temperature, high-surge automotive power line protection with AEC-Q101 validation and extended junction temperature capability.
FAQ
What is the clamping voltage of the 3KASMC26AHM3_A/H under maximum surge conditions?
The 3KASMC26AHM3_A/H has a maximum clamping voltage (VC) of 42.1 V when subjected to a 71.3 A peak pulse current with a 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees predictable overvoltage limiting for downstream components such as DC-DC controllers and microcontrollers in 24 V systems.
Is the 3KASMC26AHM3_A/H qualified for automotive applications?
Yes, the 3KASMC26AHM3_A/H is fully AEC-Q101 qualified and rated for operation up to 185 °C junction temperature. It meets MSL Level 1 per J-STD-020 and is approved for under-hood automotive use including engine control units, body control modules, and ADAS sensor power supplies - as confirmed in Vishay document 89962.
What package does the 3KASMC26AHM3_A/H use, and what are its mounting requirements?
The 3KASMC26AHM3_A/H uses the DO-214AB (SMC) package with matte tin-plated leads. Mounting requires the minimum recommended pad layout per Vishay's outline drawing: 0.126" (3.20 mm) minimum pad width, 0.185" (4.69 mm) maximum pad length, and 0.320" (8.13 mm) reference body length. No thermal vias are required due to its 18.3 °C/W RθJL.
How does the 3KASMC26AHM3_A/H compare to standard SMCJ26A in terms of reliability?
The 3KASMC26AHM3_A/H exceeds SMCJ26A in reliability: it is AEC-Q101 qualified (vs. AEC-Q200), features 1 μA max reverse leakage at VWM (vs. 5 μA), and maintains full 3000 W surge capability at 185 °C (vs. 175 °C for SMCJ26A). These differences directly impact field failure rates in automotive power systems.
What is the peak forward surge current rating for the 3KASMC26AHM3_A/H?
The 3KASMC26AHM3_A/H supports a peak forward surge current (IFSM) of 200 A per 8.3 ms single half-sine wave, as defined in JEDEC standards. This rating enables repeated handling of inductive switch-off events in motor drive outputs and solenoid drivers without parametric shift or catastrophic failure.
3KASMC26AHM3_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:
- Obsolete
- 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):
- 71.3A
- Power - Peak Pulse:
- 3000W (3kW)
- 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 (SMCJ)
3KASMC26AHM3_A/H FAQ
1.How can I place an order for 3KASMC26AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC26AHM3_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 3KASMC26AHM3_A/H reliable?
The price and inventory of 3KASMC26AHM3_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 3KASMC26AHM3_A/H is usually 5 days.
3.What payment methods are accepted for 3KASMC26AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC26AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC26AHM3_A/H?
3KASMC26AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC26AHM3_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 3KASMC26AHM3_A/H?
For technical support, including 3KASMC26AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC26AHM3_A/H requirements.
6.How does Aetrix verify that 3KASMC26AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All 3KASMC26AHM3_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 3KASMC26AHM3_A/H meets industry standards.
7.What is the process for return or replacement of 3KASMC26AHM3_A/H?
All 3KASMC26AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC26AHM3_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 3KASMC26AHM3_A/H part is unused and in its original packaging.
Return procedure for 3KASMC26AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3KASMC26AHM3_A/H Tags
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