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Vishay General Semiconductor - Diodes Division 3KASMC43AHM3/57T
- Part No.:
- 3KASMC43AHM3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC43AHM3/57T.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,556
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Product details
Overview
3KASMC43AHM3/57T 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 inductive switching transients in engine control units and motor drives.
For engineers reviewing the 3KASMC43AHM3/57T datasheet, 3KASMC43AHM3/57T pinout, 3KASMC43AHM3/57T application, or 3KASMC43AHM3/57T equivalent, key selection criteria include its DO-214AB (SMC) package compatibility, AEC-Q101 qualification, 43 V stand-off voltage, low incremental surge resistance, and TJ = 185 °C capability for under-hood automotive deployments.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to achieve stable clamping performance across temperature extremes. Its unidirectional polarity and 43 V stand-off voltage (VWM) are matched to 47.8–52.8 V breakdown (VBR) with 1 mA test current, ensuring reliable turn-on before downstream device damage.
The device sustains 200 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine) and exhibits 18.3 °C/W junction-to-lead thermal resistance, supporting high-power transient absorption without thermal runaway when mounted per recommended pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - Maximum continuous reverse operating voltage before clamping begins; sets protection threshold for 48 V nominal systems. |
| VBR (min/max) | 47.8 V / 52.8 V at 1 mA - Confirmed breakdown range ensures predictable turn-on margin above VWM. |
| VC @ IPPM | 69.4 V at 43.2 A - Clamping voltage during 3000 W surge; defines worst-case stress on protected circuitry. |
| PPPM | 3000 W (10/1000 µs) - Peak surge energy handling capacity suitable for ISO 7637-2 Pulse 1/2a/5a compliance testing. |
| TJ max. | 185 °C - Enables placement near high-temperature components (e.g., power converters, ECUs) without derating. |
| IFSM | 200 A (8.3 ms half-sine) - Withstands high-current inrush events such as load dump in automotive battery systems. |
| RθJL | 18.3 °C/W - Low junction-to-lead thermal resistance supports efficient heat transfer to PCB copper pads. |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, matte tin-plated leads, RoHS-compliant, MSL Level 1 (260 °C reflow peak), cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to system ground or low-side return path; enables unidirectional clamping from rail to GND. |
| Cathode | Current exit point during forward conduction; marked with band | Connected to protected line (e.g., 48 V supply); conducts surge current to ground when V > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per JESD22 standards. |
| Junction passivation optimized design | Reduces leakage drift and parameter shift over time and temperature, critical for long-life embedded systems. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients, improving clamping precision beyond basic VBR specification. |
| Meets MSL Level 1 | Allows single-reflow assembly without moisture sensitivity concerns - no baking required prior to SMT placement. |
| 185 °C junction rating | Supports operation in high-ambient environments (e.g., engine compartments) without thermal shutdown or degradation. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Motor Drive Power Rail |
|---|---|
Use Scenario: Protection of microcontroller I/O and gate drivers against load dump and inductive kickback from solenoids/fuel injectors. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between 12/48 V battery rail and protected IC inputs. Use Value: Clamps transients to ≤69.4 V within nanoseconds, preventing latch-up or oxide rupture in AEC-Q100 qualified MCUs. |
Use Scenario: Safeguarding IGBT gate drivers and current-sense amplifiers from flyback spikes in BLDC motor inverters. IC Role / Device Role / Timing Role: Rail-to-ground transient suppressor on DC bus and gate drive supply lines. Use Value: Absorbs 3000 W surges without degradation, maintaining signal integrity during rapid PWM switching transitions. |
| Telecom Base Station Power Supply | Consumer Appliance Main Board |
Use Scenario: Mitigating lightning-induced surges on -48 V telecom power distribution networks. IC Role / Device Role / Timing Role: Primary-level surge suppression on input bulk supply before DC/DC conversion stages. Use Value: Withstands repeated 10/1000 µs surges per IEC 61000-4-5 Level 4, reducing field failure rates in outdoor cabinets. |
Use Scenario: Protecting MCU reset lines and communication interfaces (UART, I²C) from ESD and relay bounce in washing machines. IC Role / Device Role / Timing Role: Localized clamping device adjacent to sensitive digital pins. Use Value: Sub-1 ns response time prevents data corruption during 8 kV contact ESD events per IEC 61000-4-2. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43A | Same VWM (43 V), lower PPPM (600 W), DO-214AA (SMB) package (smaller footprint, higher RθJA) | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a or load dump simulation | Select only where space constraints outweigh surge margin requirements and ambient temperature remains <105 °C. |
| SMCJ43A | Identical VWM (43 V), same PPPM (3000 W), DO-214AB (SMC) package, but rated only to TJ = 150 °C | Not AEC-Q101 qualified; lacks high-temperature stability validation for under-hood use | Acceptable for industrial controls with controlled ambient, but not for automotive Grade 1 or 2 deployments. |
Compared with SMBJ43A and SMCJ43A, the 3KASMC43AHM3/57T uniquely combines AEC-Q101 qualification, 185 °C operation, and full 3000 W surge capacity in the DO-214AB package - making it the only option qualified for high-reliability automotive power rail protection where thermal and surge margins are simultaneously critical.
Availability
3KASMC43AHM3/57T is available at Aetrix Electronics and suitable for automotive engine control units, industrial motor drives, telecom power supplies, and consumer appliance main boards requiring stable component supply and long-term lifecycle support.
Supply support for 3KASMC43AHM3/57T 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 reliability, efficiency, and application-specific performance.
The 3KASMCxxA series was developed specifically for high-temperature, high-surge automotive and industrial environments - delivering enhanced thermal stability and AEC-Q101 compliance in standard SMC packaging.
FAQ
What is the clamping voltage of the 3KASMC43AHM3/57T under maximum surge conditions?
The 3KASMC43AHM3/57T clamps at 69.4 V when subjected to its rated peak pulse current of 43.2 A (10/1000 µs waveform). This value is measured per ANSI/IEEE C62.35 and represents the maximum voltage seen by downstream circuitry during a full 3000 W transient event - critical for verifying safe operating margins of protected ICs and MOSFETs.
Is the 3KASMC43AHM3/57T qualified for automotive applications?
Yes, the 3KASMC43AHM3/57T is AEC-Q101 qualified and rated for operation up to 185 °C junction temperature. It meets automotive reliability requirements including temperature cycling, highly accelerated life testing (HALT), and surge immunity per ISO 7637-2 - making it suitable for engine control modules, body control units, and ADAS power domains.
What package type does the 3KASMC43AHM3/57T use, and what are its mounting requirements?
The 3KASMC43AHM3/57T uses the DO-214AB (SMC) surface-mount package with matte tin-plated leads. It requires the minimum recommended pad layout per Vishay document 89962 - including 0.126" (3.20 mm) minimum pad width and 0.185" (4.69 mm) maximum pad length - to ensure proper thermal dissipation and mechanical reliability during reflow soldering.
How does the 3KASMC43AHM3/57T differ from standard SMCJ43A TVS diodes?
While both share the DO-214AB package and 43 V stand-off voltage, the 3KASMC43AHM3/57T is distinguished by its 185 °C maximum junction temperature (vs. 150 °C for SMCJ43A) and formal AEC-Q101 qualification. These attributes enable deployment in higher-ambient automotive zones where SMCJ43A would require derating or fail qualification audits.
What is the surge current rating of the 3KASMC43AHM3/57T, and how is it tested?
The 3KASMC43AHM3/57T withstands a non-repetitive peak forward surge current of 200 A, tested using an 8.3 ms single half-sine waveform per JESD22-A112. This rating validates its ability to survive automotive load dump events without parametric shift or catastrophic failure - provided board layout adheres to Vishay's thermal recommendations.
3KASMC43AHM3/57T 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)
3KASMC43AHM3/57T FAQ
1.How can I place an order for 3KASMC43AHM3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC43AHM3/57T 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 3KASMC43AHM3/57T reliable?
The price and inventory of 3KASMC43AHM3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3KASMC43AHM3/57T is usually 5 days.
3.What payment methods are accepted for 3KASMC43AHM3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC43AHM3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC43AHM3/57T?
3KASMC43AHM3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC43AHM3/57T 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 3KASMC43AHM3/57T?
For technical support, including 3KASMC43AHM3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC43AHM3/57T requirements.
6.How does Aetrix verify that 3KASMC43AHM3/57T is sourced from the original manufacturer or authorized distributors?
All 3KASMC43AHM3/57T 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 3KASMC43AHM3/57T meets industry standards.
7.What is the process for return or replacement of 3KASMC43AHM3/57T?
All 3KASMC43AHM3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC43AHM3/57T, 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 3KASMC43AHM3/57T part is unused and in its original packaging.
Return procedure for 3KASMC43AHM3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3KASMC43AHM3/57T Tags
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