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Vishay General Semiconductor - Diodes Division 3KASMC15AHE3/57T
- Part No.:
- 3KASMC15AHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC15AHE3/57T.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,639
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Product details
Overview
3KASMC15AHE3/57T from Vishay General Semiconductor is a unidirectional surface-mount PAR® Transient Voltage Suppressor (TVS) diode in DO-214AB (SMC) package, rated for 15 V stand-off voltage, 16.7–18.5 V breakdown at 1 mA, 3000 W peak pulse power (10/1000 μs), and 123 A peak surge current - deployed for automotive power rail and sensor line protection against inductive switching transients.
For engineers reviewing the 3KASMC15AHE3/57T datasheet, 3KASMC15AHE3/57T pinout, 3KASMC15AHE3/57T application, or 3KASMC15AHE3/57T equivalent, key selection criteria include clamping voltage (24.4 V at 123 A), junction temperature capability (−65 °C to +185 °C), AEC-Q101 qualification, MSL Level 1 rating, and unidirectional polarity with cathode band marking.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology optimized for high-temperature stability and low incremental surge resistance. Its 185 °C maximum junction temperature and AEC-Q101 qualification confirm suitability for under-hood automotive environments where thermal derating and reliability under transient stress are critical.
The device operates exclusively in unidirectional mode with a 15 V reverse stand-off voltage and clamps at ≤24.4 V during 123 A, 10/1000 μs surges - enabling robust overvoltage protection for 12 V automotive systems without forward conduction interference during normal operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - Maximum continuous reverse operating voltage before clamping begins; sets system-level DC rail compatibility for 12 V nominal automotive circuits. |
| VBR (min/max) | 16.7 V / 18.5 V at 1 mA - Confirmed breakdown threshold range ensures predictable turn-on margin above VWM, minimizing false triggering. |
| IPPM | 123 A - Peak surge current handling at 10/1000 μs waveform; defines minimum transient energy absorption capacity per pulse. |
| VC | 24.4 V - Clamping voltage at IPPM; determines maximum voltage imposed on protected IC/MOSFET during worst-case surge. |
| PPPM | 3000 W - Peak pulse power rating; enables suppression of high-energy transients such as ISO 7637-2 Pulse 1/2a/5a without degradation. |
| TJ max | +185 °C - Maximum junction temperature; supports operation in engine compartment locations with minimal heatsinking. |
| Package | DO-214AB (SMC) - Standardized surface-mount outline with 7.11 mm × 6.60 mm footprint and 3.20 mm height; compatible with automated SMT assembly. |
Pinout & Package
DO-214AB (SMC) package with two terminals: anode and cathode. Cathode identified by molded color band. Mounting requires minimum pad layout per Vishay spec: 3.20 mm × 1.52 mm pads with 4.69 mm center-to-center spacing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Surge return path | Connected to ground or low-impedance return plane; carries full surge current during clamping events. |
| Cathode | Protected line connection / Clamping node | Connected to line being protected (e.g., 12 V rail or sensor signal); voltage referenced to anode during transient suppression. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance - required for Tier-1 ECU and ADAS module designs. |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns - eliminates pre-bake requirements in production. |
| 185 °C junction rating | Enables direct placement near heat sources (e.g., power converters, motor drivers) without thermal derating penalties in under-hood applications. |
| 3000 W peak pulse power | Meets ISO 7637-2 Pulse 5a (load dump) energy requirements for 12 V systems with margin - protects downstream MOSFETs and microcontrollers. |
| Low clamping ratio (VC/VBR ≈ 1.35) | Minimizes overvoltage stress on protected devices while maintaining fast response (<1 ps typical) - preserves signal integrity in sensor interfaces. |
Applications
| Automotive Power Rail Protection | Engine Control Unit (ECU) Input Protection |
|---|---|
|
Use Scenario: Suppresses load dump transients (ISO 7637-2 Pulse 5a) on 12 V battery-fed power rails in vehicles. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between power rail and chassis ground to clamp surges above 24.4 V. Use Value: Prevents damage to PMICs and MCU power inputs by limiting transient voltage to safe levels within 1 ns response time. |
Use Scenario: Protects analog and digital input pins of ECUs from inductive kickback generated by solenoid and relay switching. IC Role / Device Role / Timing Role: Standoff-rated TVS connected inline with sensor supply lines (e.g., MAP, TPS) to absorb 100–200 A spikes. Use Value: Maintains ECU functional safety by ensuring input voltage stays below absolute maximum ratings during aggressive load switching. |
| Automotive Sensor Signal Line Protection | Industrial CAN Bus Node Protection |
|
Use Scenario: Shields low-voltage analog sensor outputs (e.g., 0–5 V throttle position signals) from ESD and coupled transients. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS placed at connector interface to shunt ESD (IEC 61000-4-2 ±15 kV) to ground. Use Value: Preserves signal fidelity with <10 pF junction capacitance while meeting AEC-Q101 stress test requirements. |
Use Scenario: Guards CANH/CANL differential pair nodes in industrial gateways against surge coupling from adjacent 24 V control wiring. IC Role / Device Role / Timing Role: Dual TVS configuration (one per line) referenced to common ground, leveraging 15 V VWM to avoid interfering with CAN recessive/dominant states. Use Value: Enables robust communication continuity during lightning-induced surges up to 3 kV (IEC 61000-4-5) without bus lockup. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15A | Lower PPPM (400 W), lower IPPM (32.4 A), same VWM/VBR range, SMA package (smaller thermal mass) | Not AEC-Q101 qualified; limited to consumer/industrial non-automotive use | Select when cost-sensitive, low-energy transients only, and automotive qualification is not required. |
| 1.5KE15A | Higher VC (24.5 V), same VWM, through-hole DO-201 package, 1500 W PPPM | Lacks MSL Level 1 and AEC-Q101; unsuitable for SMT-only production or automotive under-hood placement | Choose for legacy through-hole designs needing higher surge margin than SMAJ but less than 3KASMC series. |
Compared with SMAJ15A and 1.5KE15A, the 3KASMC15AHE3/57T delivers 7.5× higher peak pulse power, AEC-Q101 compliance, and MSL Level 1 reflow readiness - making it the only option qualified for high-reliability automotive SMT deployment requiring sustained 185 °C operation.
Availability
3KASMC15AHE3/57T is available at Aetrix Electronics and suitable for automotive power rail protection, ECU input safeguarding, and industrial CAN bus node hardening requiring stable component supply across multi-year production cycles.
Supply support for 3KASMC15AHE3/57T 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, optoelectronics, and passive components for automotive, industrial, and computing markets.
The 3KASMC series belongs to Vishay's PAR® (Protection Against Real-world transients) TVS family, engineered specifically for AEC-Q101-compliant automotive transient suppression with extended temperature range and high pulse power density.
FAQ
What is the clamping voltage of the 3KASMC15AHE3/57T under peak surge conditions?
The 3KASMC15AHE3/57T clamps at a maximum of 24.4 V when subjected to its rated 123 A peak pulse current (10/1000 μs waveform). This value is measured and guaranteed per Vishay Document 89962, ensuring protected circuitry remains within safe voltage limits during ISO 7637-2 Pulse 5a load dump events. The 3KASMC15AHE3/57T maintains this performance across its full operating temperature range.
Is the 3KASMC15AHE3/57T qualified for automotive applications?
Yes, the 3KASMC15AHE3/57T is AEC-Q101 qualified and rated for operation from −65 °C to +185 °C, making it suitable for under-hood automotive environments. It meets MSL Level 1 per J-STD-020 and is RoHS-compliant. The 3KASMC15AHE3/57T is explicitly listed in Vishay's AEC-Q101 certified product table for transient voltage suppressors.
What package type does the 3KASMC15AHE3/57T use, and what are its mounting requirements?
The 3KASMC15AHE3/57T uses the DO-214AB (SMC) surface-mount package, with dimensions 7.11 mm × 6.60 mm × 3.20 mm. Vishay specifies a minimum pad layout: 3.20 mm × 1.52 mm pads spaced 4.69 mm center-to-center. The 3KASMC15AHE3/57T requires no pre-bake due to its MSL Level 1 rating and is compatible with standard lead-free reflow profiles peaking at 260 °C.
How does the 3KASMC15AHE3/57T compare to standard SMAJ-series TVS diodes?
The 3KASMC15AHE3/57T delivers 3000 W peak pulse power - 7.5× higher than the 400 W rating of SMAJ15A - and is AEC-Q101 qualified, whereas SMAJ15A is not. The 3KASMC15AHE3/57T also features higher surge current (123 A vs. 32.4 A) and superior thermal capability (185 °C vs. 150 °C). These differences make the 3KASMC15AHE3/57T appropriate for demanding automotive applications where the SMAJ15A would fail prematurely.
What is the reverse leakage current specification for the 3KASMC15AHE3/57T at rated stand-off voltage?
At its 15 V stand-off voltage (VWM) and ambient temperature of 25 °C, the 3KASMC15AHE3/57T exhibits a maximum reverse leakage current of 1.0 μA. At elevated temperature (TJ = 150 °C), leakage increases to a maximum of 10 μA - a value confirmed in Vishay's Electrical Characteristics table (Document 89962, page 2). This low leakage ensures minimal power loss in always-on automotive circuits.
3KASMC15AHE3/57T 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):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 24.4V
- Current - Peak Pulse (10/1000µs):
- 123A
- 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)
3KASMC15AHE3/57T FAQ
1.How can I place an order for 3KASMC15AHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC15AHE3/57T 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 3KASMC15AHE3/57T reliable?
The price and inventory of 3KASMC15AHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3KASMC15AHE3/57T is usually 5 days.
3.What payment methods are accepted for 3KASMC15AHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC15AHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC15AHE3/57T?
3KASMC15AHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC15AHE3/57T 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 3KASMC15AHE3/57T?
For technical support, including 3KASMC15AHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC15AHE3/57T requirements.
6.How does Aetrix verify that 3KASMC15AHE3/57T is sourced from the original manufacturer or authorized distributors?
All 3KASMC15AHE3/57T 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 3KASMC15AHE3/57T meets industry standards.
7.What is the process for return or replacement of 3KASMC15AHE3/57T?
All 3KASMC15AHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC15AHE3/57T, 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 3KASMC15AHE3/57T part is unused and in its original packaging.
Return procedure for 3KASMC15AHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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