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Vishay General Semiconductor - Diodes Division 3KASMC43AHE3/57T
- Part No.:
- 3KASMC43AHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC43AHE3/57T.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,102
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Product details
Overview
3KASMC43AHE3/57T from Vishay General Semiconductor is a unidirectional surface-mount PAR® Transient Voltage Suppressor (TVS) diode in DO-214AB (SMC) package, rated for 43 V stand-off voltage, 47.8–52.8 V breakdown at 1 mA, 3000 W peak pulse power (10/1000 μs), 69.4 V clamping voltage at 43.2 A surge current, and 185 °C maximum junction temperature - deployed for automotive-grade overvoltage protection of sensor signal lines and MOSFET gate drivers.
For engineers reviewing the 3KASMC43AHE3/57T datasheet, 3KASMC43AHE3/57T pinout, 3KASMC43AHE3/57T application, or 3KASMC43AHE3/57T equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, MSL Level 1 moisture sensitivity, 77.5 °C/W junction-to-ambient thermal resistance, and compatibility with high-reliability automotive powertrain and ADAS subsystems requiring robust transient immunity.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology to deliver stable clamping performance across -65 °C to +185 °C operating range, with low incremental surge resistance and sub-nanosecond response time enabling effective suppression of ESD and load-dump transients. Its 10/1000 μs waveform rating aligns with IEC 61000-4-5 and ISO 7637-2 standards for automotive electronics.
The device operates exclusively in unidirectional mode with cathode band marking, requires no external biasing, and achieves 6.0 W steady-state power dissipation on infinite heatsink at TL = 75 °C. Thermal design must account for RθJL = 18.3 °C/W and recommended minimum pad layout per DO-214AB mechanical drawing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - Maximum reverse working voltage before clamping begins; defines safe operating margin for 36 V nominal automotive systems. |
| VBR min/max | 47.8 V / 52.8 V at IT = 1 mA - Confirmed breakdown window ensures predictable turn-on under surge conditions. |
| PPPM | 3000 W (10/1000 μs) - Sustains high-energy transients typical of ISO 7637-2 Pulse 5a (load dump) without failure. |
| VC @ IPPM | 69.4 V at 43.2 A - Clamping voltage limits downstream IC stress during worst-case surge events. |
| TJ max | +185 °C - Enables placement near high-temperature engine control units without derating concerns. |
| AEC-Q101 | Qualified - Meets stress test requirements for automotive discrete semiconductors including HTGB, HTRB, and TCT. |
| MSL Level | Level 1 (J-STD-020) - Supports standard reflow profiles up to 260 °C peak without preconditioning. |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, matte tin-plated leads, cathode indicated by color band. Dimensions: 7.11 × 6.60 × 3.20 mm (L × W × H), compliant with UL 94 V-0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward conduction | Connected to protected circuit ground or low-side reference; enables unidirectional clamping to GND. |
| Cathode | Current exit terminal; marked with band | Connected to line being protected (e.g., sensor supply or CAN bus); clamps transients toward ground. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier structure ensures stable leakage (<1 μA at VWM) and long-term reliability under thermal cycling. |
| High-temperature operation | Rated for continuous operation up to +185 °C junction temperature - suitable for under-hood automotive environments. |
| Peak pulse power | 3000 W capability meets ISO 7637-2 Pulse 5a requirements for 12 V and 24 V vehicle systems. |
| Clamping efficiency | Low VC/VBR ratio (~1.35) minimizes voltage overshoot during fast transients while maintaining low dynamic impedance. |
| Automotive qualification | AEC-Q101 qualification confirms compliance with accelerated stress tests for humidity, temperature, and mechanical robustness. |
Applications
| Automotive Powertrain Sensors | Industrial Motor Drive Inputs |
|---|---|
|
Use Scenario: Protecting crankshaft position sensor signal lines from inductive kickback and battery load-dump transients in engine control modules. IC Role / Device Role / Timing Role: Unidirectional TVS clamp referenced to chassis ground, absorbing >3 kV spikes without affecting signal integrity. Use Value: Prevents false triggering or latch-up in Hall-effect sensors by limiting transient voltage to ≤69.4 V during ISO 7637-2 Pulse 5a events. |
Use Scenario: Safeguarding analog input pins of motor drive controller ICs against switching noise from IGBT gate drivers. IC Role / Device Role / Timing Role: Fast-response transient suppressor placed at PCB entry point, shunting surge energy before reaching precision ADC front-end. Use Value: Maintains <1 μA leakage at 43 V to avoid DC offset errors in 16-bit current sensing circuits operating at ambient up to 105 °C. |
| ADAS Camera Power Rails | Telecom Base Station DC Feeds |
|
Use Scenario: Shielding 12 V power input of surround-view camera modules from jump-start surges and alternator ripple. IC Role / Device Role / Timing Role: Primary overvoltage protection device upstream of LDO regulators, activated within <1 ns of transient onset. Use Value: Withstands 200 A non-repetitive surge (8.3 ms half-sine) without degradation, ensuring functional safety compliance per ISO 26262 ASIL-B. |
Use Scenario: Guarding 48 V DC power feeds in remote radio units against lightning-induced surges entering via outdoor cabling. IC Role / Device Role / Timing Role: Secondary-level TVS in cascade with gas discharge tube (GDT), handling residual energy after primary clamping. Use Value: Delivers 3000 W peak power handling with 77.5 °C/W RθJA, enabling compact layout without forced-air cooling in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43A | Same VWM (43 V), lower PPPM (600 W), DO-214AA (SMB) package, RθJA = 110 °C/W | Limited to lower-energy transients (IEC 61000-4-2 ESD only); unsuitable for ISO 7637-2 Pulse 5a | Select when space-constrained layouts require smaller footprint and surge energy is below 600 W. |
| SMCJ43A | Identical VWM, PPPM = 3000 W, same DO-214AB package, but rated only to +150 °C TJ and not AEC-Q101 qualified | Acceptable for industrial use but excluded from automotive production due to missing qualification | Choose for cost-sensitive industrial designs where AEC-Q101 is not mandated and ambient temperature stays below 125 °C. |
Compared with SMBJ43A and SMCJ43A, the 3KASMC43AHE3/57T uniquely combines 3000 W surge capability, +185 °C operation, and full AEC-Q101 qualification - making it the only option qualified for under-hood automotive applications demanding simultaneous high power, high temperature, and high reliability.
Availability
3KASMC43AHE3/57T is available at Aetrix Electronics and suitable for automotive powertrain control, industrial motor drives, ADAS camera modules, and telecom base station power supplies requiring stable component supply with guaranteed long-term continuity.
Supply support for 3KASMC43AHE3/57T 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 high-reliability diodes, MOSFETs, and optoelectronics for automotive, industrial, and computing markets.
The 3KASMC series belongs to Vishay's PAR® (Protected Anisotropic Rectifier) TVS platform, engineered specifically for AEC-Q101-compliant automotive transient suppression with enhanced thermal stability and surge endurance.
FAQ
What is the clamping voltage of the 3KASMC43AHE3/57T at its rated peak pulse current?
The 3KASMC43AHE3/57T exhibits a maximum clamping voltage (VC) of 69.4 V when subjected to its rated peak pulse current (IPPM) of 43.2 A under a 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that downstream components experience no more than 69.4 V during worst-case surge events - critical for protecting 48 V-tolerant interface ICs in automotive applications. The 3KASMC43AHE3/57T maintains this clamping performance across its full operating temperature range.
Is the 3KASMC43AHE3/57T suitable for use in automotive under-hood environments?
Yes, the 3KASMC43AHE3/57T is explicitly qualified to AEC-Q101 and rated for continuous operation up to +185 °C junction temperature, making it suitable for under-hood automotive applications such as engine control units, transmission control modules, and ADAS radar units. Its DO-214AB package passes MSL Level 1 reflow and its passivated junction ensures stable leakage (<1 μA at 43 V) even after thermal cycling - both essential for under-hood reliability. The 3KASMC43AHE3/57T is designed for this environment.
What does the "HE3/57T" suffix indicate in the 3KASMC43AHE3/57T part number?
The "HE3/57T" suffix denotes the packaging configuration: "HE3" identifies the RoHS-compliant, AEC-Q101-qualified base variant (HM3), while "57T" specifies the preferred packaging code for 7-inch diameter plastic tape and reel, containing 850 units per reel. This matches Vishay's ordering information table where 3KASMC43AHE3/57T corresponds to the 850-unit reel format with standard lead finish and moisture sensitivity level compliance. The 3KASMC43AHE3/57T is supplied in this exact configuration.
How does the thermal resistance of the 3KASMC43AHE3/57T affect PCB layout decisions?
The 3KASMC43AHE3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 77.5 °C/W when mounted on the minimum recommended pad layout per Vishay's DO-214AB outline drawing. To maintain TJ ≤ 185 °C under 6.0 W steady-state dissipation, designers must provide adequate copper area (≥ 185 mm² per side) and avoid thermal isolation. Layouts using smaller pads or single-layer boards will exceed RθJA and risk thermal runaway. The 3KASMC43AHE3/57T requires adherence to Vishay's specified mounting pad dimensions for rated performance.
Can the 3KASMC43AHE3/57T replace the older 3KASMC43A without design changes?
Yes - the 3KASMC43AHE3/57T is a direct replacement for the base 3KASMC43A, sharing identical electrical specifications, DO-214AB package dimensions, pinout, and thermal characteristics. The "HE3/57T" suffix reflects updated packaging and qualification status (RoHS + AEC-Q101), but all performance parameters - including VWM, VBR, PPPM, VC, and TJ max - remain unchanged from the original 3KASMC43A. No PCB or schematic modifications are required when upgrading to the 3KASMC43AHE3/57T.
3KASMC43AHE3/57T 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)
3KASMC43AHE3/57T FAQ
1.How can I place an order for 3KASMC43AHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC43AHE3/57T 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 3KASMC43AHE3/57T reliable?
The price and inventory of 3KASMC43AHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3KASMC43AHE3/57T is usually 5 days.
3.What payment methods are accepted for 3KASMC43AHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC43AHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC43AHE3/57T?
3KASMC43AHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC43AHE3/57T 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 3KASMC43AHE3/57T?
For technical support, including 3KASMC43AHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC43AHE3/57T requirements.
6.How does Aetrix verify that 3KASMC43AHE3/57T is sourced from the original manufacturer or authorized distributors?
All 3KASMC43AHE3/57T 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 3KASMC43AHE3/57T meets industry standards.
7.What is the process for return or replacement of 3KASMC43AHE3/57T?
All 3KASMC43AHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC43AHE3/57T, 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 3KASMC43AHE3/57T part is unused and in its original packaging.
Return procedure for 3KASMC43AHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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