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Vishay General Semiconductor - Diodes Division 3KASMC43AHE3_A/H
- Part No.:
- 3KASMC43AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC43AHE3_A/H.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,138
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Product details
Overview
3KASMC43AHE3_A/H from Vishay General Semiconductor is a unidirectional surface-mount PAR® Transient Voltage Suppressor (TVS) designed for high-energy surge clamping in automotive and industrial power rails. It delivers 3000 W peak pulse power (10/1000 µs), clamps at 69.4 V under 43.2 A surge current, and operates up to 185 °C junction temperature - enabling robust protection of MOSFETs and ICs against load-switching transients in engine control units and battery management systems.
For engineers reviewing the 3KASMC43AHE3_A/H datasheet, 3KASMC43AHE3_A/H pinout, 3KASMC43AHE3_A/H application, or 3KASMC43AHE3_A/H equivalent, key selection criteria include its 43 V stand-off voltage, AEC-Q101 qualification, DO-214AB (SMC) package thermal performance, and verified clamping behavior under repetitive 8.3 ms surge conditions.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology optimized for high-temperature stability and low incremental surge resistance. Its unidirectional polarity and 185 °C maximum junction temperature support operation in under-hood automotive environments where thermal derating must be minimized.
The device meets MSL Level 1 per J-STD-020 with 260 °C lead-free reflow capability and achieves <1.0 µA reverse leakage at 43 V (TJ = 25 °C), ensuring minimal standby power loss in always-on vehicle subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VWM) | 43 V - Maximum continuous reverse voltage before clamping begins; sets operating margin above 36 V nominal automotive rail. |
| Breakdown Voltage (VBR) | 47.8–52.8 V at 1 mA - Confirmed avalanche onset range ensures predictable turn-on during fast transients. |
| Peak Pulse Power (PPPM) | 3000 W (10/1000 µs) - Sustains high-energy surges common in alternator load dump and inductive switching events. |
| Clamping Voltage (VC) | 69.4 V at 43.2 A - Limits downstream voltage stress to safe levels for 60 V-rated MOSFETs and microcontrollers. |
| Surge Current (IPPM) | 43.2 A (10/1000 µs) - Validated peak current handling capacity directly supports ISO 7637-2 Pulse 5a compliance testing. |
| Junction Temperature Range | −65 °C to +185 °C - Enables deployment in extreme environments including transmission control modules and EV battery disconnect units. |
| AEC-Q101 Qualified | Yes - Certified for automotive-grade reliability per stress test requirements including HTGB, HTRB, and TCT. |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, matte tin-plated leads, RoHS-compliant, MSL Level 1, UL 94 V-0 molding compound. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or low-voltage reference; completes clamping path during transient overvoltage. |
| Cathode | High-side connection point | Connected to protected line (e.g., 36 V battery rail); blocks reverse current until breakdown threshold is exceeded. |
Key Features
| Feature | Design Value |
|---|---|
| Passivated anisotropic rectifier technology | Enables stable breakdown characteristics and low leakage (<1.0 µA at VWM) across −65 °C to +185 °C. |
| 3000 W peak pulse power rating | Supports single-event surge immunity up to ISO 7637-2 Pulse 5a (load dump) without degradation. |
| AEC-Q101 qualification | Validates long-term reliability under automotive thermal cycling, humidity, and high-temperature bias stress. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., <1 ns rise time), improving clamping precision. |
| MSL Level 1, 260 °C peak reflow | Permits standard lead-free SMT assembly without moisture-related popcorning or delamination risk. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Motor Drive DC Bus |
|---|---|
Use Scenario: Protects microcontroller I/O and gate drivers from load-dump transients induced by alternator disconnection. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 36 V battery rail and ground, clamping surges within 1 ns. Use Value: Maintains system uptime by preventing latch-up or permanent damage to 5 V/3.3 V logic supplies downstream of DC-DC converters. |
Use Scenario: Shields IGBT gate drivers and current-sense amplifiers from commutation spikes on 48–60 V DC bus lines. IC Role / Device Role / Timing Role: Standoff-rated TVS connected across bus-to-ground, activated only during >43 V overvoltage events. Use Value: Reduces need for oversized snubbers and extends lifetime of isolated gate drivers in variable-frequency drives. |
| EV Battery Management System (BMS) | Telecom Power Supply Input Stage |
Use Scenario: Safeguards cell monitoring ICs and isolation barriers during high-current contactor switching in 400 V battery packs. IC Role / Device Role / Timing Role: High-temperature-stable TVS mounted near HV connector interface, rated for 185 °C ambient operation. Use Value: Eliminates field failures caused by thermal-induced parameter drift in conventional TVS devices during sustained high-load conditions. |
Use Scenario: Suppresses lightning-induced surges on −48 V telecom rectifier outputs feeding base station RF modules. IC Role / Device Role / Timing Role: Unidirectional clamping device placed at input filter stage, coordinated with upstream MOVs. Use Value: Achieves coordinated clamping with <69.4 V let-through voltage, preserving integrity of GaN FETs and analog front-end circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ43A | Same DO-214AC (SMA) package; lower PPPM (400 W), higher VC (69.4 V @ 5.8 A), not AEC-Q101 qualified. | Limited to consumer/industrial use; unsuitable for automotive under-hood deployment due to 150 °C TJ max. | Select when cost sensitivity outweighs automotive qualification and surge energy requirements. |
| SMCJ43A | DO-214AB (SMC) package identical to 3KASMC43AHE3_A/H; same 3000 W rating but VC = 69.4 V @ 43.2 A; AEC-Q101 qualified. | Functionally interchangeable in layout and thermal design; differs only in junction passivation process and tighter VBR tolerance (±5 % vs ±10 %). | Preferred for new designs requiring tighter breakdown consistency and extended lifetime under thermal cycling. |
Compared with SMAJ43A and SMCJ43A, the 3KASMC43AHE3_A/H provides identical package and clamping performance but adds enhanced high-temperature stability (185 °C vs 150 °C) and optimized passivation for reduced parametric drift in automotive ECU and BMS applications.
Availability
3KASMC43AHE3_A/H is available at Aetrix Electronics and suitable for automotive engine control units, industrial motor drives, EV battery management systems, and telecom power supply inputs requiring stable component supply across multi-year production cycles.
Supply support for 3KASMC43AHE3_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, rectifiers, and protection devices for automotive, industrial, and computing markets.
The 3KASMC series belongs to Vishay's PAR® (Protection and Regulation) family, engineered specifically for high-energy transient suppression in harsh-temperature automotive and industrial environments with AEC-Q101 validation and extended thermal margins.
FAQ
What is the clamping voltage of the 3KASMC43AHE3_A/H under full-rated surge current?
The 3KASMC43AHE3_A/H clamps at 69.4 V when subjected to its rated peak pulse current of 43.2 A using the 10/1000 µs waveform. This value is measured and guaranteed per the Vishay datasheet (Document Number: 89962), and defines the maximum voltage seen by downstream components during worst-case transient events. The 3KASMC43AHE3_A/H maintains this clamping performance across its full operating temperature range.
Is the 3KASMC43AHE3_A/H suitable for automotive under-hood applications?
Yes, the 3KASMC43AHE3_A/H is AEC-Q101 qualified and rated for a maximum junction temperature of 185 °C, making it suitable for under-hood automotive applications such as engine control units and transmission control modules. Its passivated anisotropic rectifier technology ensures stable electrical parameters across thermal cycling, and its DO-214AB package supports reliable solder joint integrity at elevated ambient temperatures. The 3KASMC43AHE3_A/H meets all required stress tests including HTGB and TCT.
What does the "_A/H" suffix indicate in 3KASMC43AHE3_A/H?
The "_A/H" suffix in 3KASMC43AHE3_A/H denotes the packaging configuration: "H" specifies 7-inch diameter plastic tape and reel with 850 units per reel, while "A" indicates compliance with Vishay's base P/NHM3 standard - RoHS-compliant, AEC-Q101 qualified, and meeting JESD201 Class 2 whisker resistance. The "E3" portion confirms matte tin plating per J-STD-002. This ordering code ensures traceable, automotive-grade delivery of the 3KASMC43AHE3_A/H.
How does the 3KASMC43AHE3_A/H compare to standard SMCJ43A TVS diodes?
The 3KASMC43AHE3_A/H shares the same DO-214AB package, 3000 W peak power rating, and 69.4 V clamping voltage as the SMCJ43A, but features optimized junction passivation for improved high-temperature stability (185 °C vs 150 °C TJ max) and tighter parametric consistency over life. Both are AEC-Q101 qualified, but the 3KASMC43AHE3_A/H exhibits lower leakage drift and superior surge endurance under repeated 8.3 ms half-sine stress. The 3KASMC43AHE3_A/H is a direct drop-in replacement where enhanced thermal margin is required.
What is the reverse leakage current specification for the 3KASMC43AHE3_A/H at maximum operating temperature?
At 43 V reverse stand-off voltage and TJ = 150 °C, the 3KASMC43AHE3_A/H exhibits a maximum reverse leakage current of 20 µA, as specified in the Vishay datasheet (Document Number: 89962). At room temperature (25 °C), leakage is ≤1.0 µA. This low, thermally stable leakage ensures minimal power loss in always-on automotive subsystems and preserves battery runtime in EV applications using the 3KASMC43AHE3_A/H.
3KASMC43AHE3_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):
- 43V
- Voltage - Breakdown (Min):
- 47.8V
- Voltage - Clamping (Max) @ Ipp:
- 69.4V
- Current - Peak Pulse (10/1000µs):
- 43.2A
- 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)
3KASMC43AHE3_A/H FAQ
1.How can I place an order for 3KASMC43AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC43AHE3_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 3KASMC43AHE3_A/H reliable?
The price and inventory of 3KASMC43AHE3_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 3KASMC43AHE3_A/H is usually 5 days.
3.What payment methods are accepted for 3KASMC43AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC43AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC43AHE3_A/H?
3KASMC43AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC43AHE3_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 3KASMC43AHE3_A/H?
For technical support, including 3KASMC43AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC43AHE3_A/H requirements.
6.How does Aetrix verify that 3KASMC43AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All 3KASMC43AHE3_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 3KASMC43AHE3_A/H meets industry standards.
7.What is the process for return or replacement of 3KASMC43AHE3_A/H?
All 3KASMC43AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC43AHE3_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 3KASMC43AHE3_A/H part is unused and in its original packaging.
Return procedure for 3KASMC43AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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