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Vishay General Semiconductor - Diodes Division 3KASMC43AHE3/9AT
- Part No.:
- 3KASMC43AHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC43AHE3/9AT.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,884
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Product details
Overview
3KASMC43AHE3/9AT 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 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.
For engineers reviewing the 3KASMC43AHE3/9AT datasheet, 3KASMC43AHE3/9AT pinout, 3KASMC43AHE3/9AT application, or 3KASMC43AHE3/9AT equivalent, key selection criteria include its DO-214AB (SMC) package, 43 V stand-off voltage, AEC-Q101 qualification, 1.0 mA breakdown test current, and 1.0 μA reverse leakage at VWM, all critical for automotive-grade transient suppression design.
Technical Context
This TVS diode uses 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 and reliability are essential.
The device meets MSL Level 1 per J-STD-020 with 260 °C lead-free reflow capability and achieves AEC-Q101 qualification. Its clamping performance (VC = 69.4 V at IPPM = 43.2 A) and fast response time ensure effective suppression of ESD and lightning-induced surges on 12 V/24 V systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - Maximum continuous reverse operating voltage before clamping begins; sets system rail compatibility for 24 V nominal automotive circuits. |
| VBR min/max | 47.8 V / 52.8 V at 1.0 mA - Confirmed breakdown range ensures reliable turn-on margin above VWM without premature conduction. |
| PPPM | 3000 W (10/1000 μs) - Peak surge energy handling capacity sufficient for ISO 7637-2 Pulse 1 & 2 and IEC 61000-4-5 Level 4 transients. |
| IPPM | 43.2 A - Peak pulse current at which clamping voltage is specified; defines minimum surge current survivability threshold. |
| VC | 69.4 V - Clamped voltage during 43.2 A surge; determines maximum stress imposed on protected downstream components. |
| TJ max | 185 °C - Enables sustained operation in high-ambient under-hood locations without thermal shutdown or degradation. |
| RθJA | 77.5 °C/W - Thermal resistance from junction to ambient; informs heatsinking requirements when mounted on standard PCB pad layout. |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, matte tin-plated leads, RoHS-compliant and AEC-Q101 qualified. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or lower-potential rail; completes clamping path during reverse surge events. |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., battery rail); conducts only during overvoltage transients to shunt current to ground. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, mechanical shock, and humidity testing per JEDEC standards. |
| 185 °C junction rating | Supports long-term reliability in high-temperature engine compartments without derating penalties up to rated power. |
| MSL Level 1 (260 °C) | Enables single-pass lead-free reflow assembly without moisture-related popcorn failure or delamination. |
| Low incremental surge resistance | Minimizes VC rise under high di/dt conditions, improving clamping precision for fast-rising transients. |
| Passivated anisotropic rectifier | Reduces parameter drift over time and temperature, ensuring stable clamping voltage across product lifetime. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Motor Drive Power Supply |
|---|---|
Use Scenario: Protection of 12 V/24 V battery input rails against load dump and inductive kickback from solenoids and fuel injectors. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between battery rail and ground to clamp transients exceeding 43 V. Use Value: Withstands 3000 W surges and maintains clamping at ≤69.4 V, preventing damage to MCU power supplies and CAN transceivers. |
Use Scenario: Safeguarding DC bus inputs of variable-frequency drives exposed to switching noise and regeneration spikes. IC Role / Device Role / Timing Role: Standoff-rated transient suppressor on main DC link, triggered only during overvoltage events >43 V. Use Value: 185 °C operation allows mounting near heat-generating IGBT modules without thermal derating loss. |
| Telecom Base Station Power Interface | Consumer Appliance Mainboard Input Stage |
Use Scenario: Secondary-level surge protection on -48 V telecom power feeds subject to lightning-induced surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: Fast-response unidirectional clamp on input rectifier output, coordinated with upstream MOVs. Use Value: 43.2 A IPPM and 69.4 V VC enable precise coordination with upstream protectors to avoid let-through voltage overshoot. |
Use Scenario: Input-stage protection for smart home appliances with brushed motors generating commutation spikes. IC Role / Device Role / Timing Role: Low-leakage (1.0 μA at VWM) TVS on AC/DC converter primary-side DC bus. Use Value: Minimal standby power loss due to ultra-low reverse leakage, supporting Energy Star compliance in always-on designs. |
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) and VC (69.4 V), but lower PPPM (600 W) and smaller SMB package (DO-214AA). | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a load dump simulation. | Select 3KASMC43AHE3/9AT when 3000 W surge immunity and AEC-Q101 qualification are mandatory. |
| 1.5KE43A | Through-hole TO-218 package, same VWM/VC, but higher VF (3.5 V) and no AEC-Q101 certification. | Requires manual insertion or wave soldering; not validated for automotive thermal cycling or vibration. | Choose 3KASMC43AHE3/9AT for automated SMT production and automotive-grade reliability assurance. |
Compared with SMBJ43A and 1.5KE43A, the 3KASMC43AHE3/9AT provides triple the peak pulse power in an AEC-Q101-qualified SMT package, enabling compact, high-reliability placement directly at point-of-entry on automotive and industrial PCBs without compromising surge margin.
Availability
3KASMC43AHE3/9AT is available at Aetrix Electronics and suitable for automotive engine control units, industrial motor drive power interfaces, and telecom base station power feeds requiring stable component supply and full traceability.
Supply support for 3KASMC43AHE3/9AT 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, and protection devices with emphasis on high-reliability and automotive-grade performance.
The 3KASMCxxA series is engineered specifically for high-energy transient suppression in harsh-environment applications, combining PAR® technology with AEC-Q101 validation to meet stringent automotive and industrial surge immunity standards.
FAQ
What is the clamping voltage of the 3KASMC43AHE3/9AT under maximum surge conditions?
The 3KASMC43AHE3/9AT exhibits a maximum clamping voltage (VC) of 69.4 V when subjected to its rated peak pulse current of 43.2 A using a 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during worst-case transient events.
Is the 3KASMC43AHE3/9AT qualified for automotive applications?
Yes, the 3KASMC43AHE3/9AT is AEC-Q101 qualified and rated for operation up to 185 °C junction temperature. It meets MSL Level 1 per J-STD-020 and is explicitly designed for automotive power rail protection, including engine control units and body electronics subject to ISO 7637-2 and ISO 16750-2 stress profiles.
What package type does the 3KASMC43AHE3/9AT use, and what are its key mechanical features?
The 3KASMC43AHE3/9AT uses the DO-214AB (SMC) surface-mount package with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Its molding compound meets UL 94 V-0 flammability rating, and the cathode is marked by a visible color band - enabling automated optical inspection and reliable reflow assembly.
How does the 3KASMC43AHE3/9AT compare to standard SMBJ-series TVS diodes in surge handling capability?
The 3KASMC43AHE3/9AT delivers 3000 W peak pulse power (10/1000 μs), five times higher than the 600 W rating of SMBJ43A. Its DO-214AB package also supports higher thermal dissipation than the smaller DO-214AA used in SMBJ devices, making it suitable for demanding load-dump and lightning-surge applications where sustained energy absorption is required.
What is the reverse leakage current specification for the 3KASMC43AHE3/9AT at its stand-off voltage?
The 3KASMC43AHE3/9AT specifies a maximum reverse leakage current (IR) of 1.0 μA at its 43 V stand-off voltage (VWM) and 25 °C ambient temperature. At elevated temperature (TJ = 150 °C), leakage remains ≤20 μA - ensuring minimal standby power loss in always-on automotive and industrial systems.
3KASMC43AHE3/9AT 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)
3KASMC43AHE3/9AT FAQ
1.How can I place an order for 3KASMC43AHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC43AHE3/9AT 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 3KASMC43AHE3/9AT reliable?
The price and inventory of 3KASMC43AHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3KASMC43AHE3/9AT is usually 5 days.
3.What payment methods are accepted for 3KASMC43AHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC43AHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC43AHE3/9AT?
3KASMC43AHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC43AHE3/9AT 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 3KASMC43AHE3/9AT?
For technical support, including 3KASMC43AHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC43AHE3/9AT requirements.
6.How does Aetrix verify that 3KASMC43AHE3/9AT is sourced from the original manufacturer or authorized distributors?
All 3KASMC43AHE3/9AT 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 3KASMC43AHE3/9AT meets industry standards.
7.What is the process for return or replacement of 3KASMC43AHE3/9AT?
All 3KASMC43AHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC43AHE3/9AT, 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 3KASMC43AHE3/9AT part is unused and in its original packaging.
Return procedure for 3KASMC43AHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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