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Vishay General Semiconductor - Diodes Division 5KASMC12AHM3/57
- Part No.:
- 5KASMC12AHM3/57
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
5KASMC12AHM3/57.pdf
- Description:
- TVS DIODE 12VWM 19.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
5KASMC12AHM3/57 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in DO-214AB (SMCJ) package, designed for high-energy surge protection of sensitive electronics. It features 12 V stand-off voltage (VWM), 13.3–14.7 V breakdown voltage (VBR), 5000 W peak pulse power (10/1000 μs), 251.3 A peak pulse current, and clamps to ≤19.9 V at rated surge - used to protect MOSFETs, ICs, and sensor signal lines in automotive and industrial power systems.
For engineers reviewing the 5KASMC12AHM3/57 datasheet, 5KASMC12AHM3/57 pinout, 5KASMC12AHM3/57 application, or 5KASMC12AHM3/57 equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, TJ = 185 °C operation, low clamping voltage under 5000 W surge, and DO-214AB thermal performance with RθJA = 100 °C/W.
Technical Context
The 5KASMC12AHM3/57 employs passivated anisotropic rectifier technology optimized for junction stability under repetitive transient stress. Its unidirectional architecture provides low dynamic impedance during clamping, enabling fast response to ESD and lightning-induced surges while maintaining <20 μA reverse leakage at 12 V and 25 °C.
Rated for 185 °C maximum junction temperature and MSL Level 1 (260 °C reflow), the device supports automotive-grade reliability per AEC-Q101. Thermal resistance values - RθJA = 100 °C/W (on minimum pad) and RθJM = 20.8 °C/W (to mount) - confirm suitability for board-level thermal management without heatsinking in most applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working range for protected circuitry. |
| VBR (min/max) | 13.3 V / 14.7 V - Breakdown occurs within this band at 1 mA test current; ensures predictable turn-on threshold under surge conditions. |
| PPPM (10×1000 μs) | 5000 W - Peak pulse power handling capability; enables protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on power rails. |
| VC @ IPPM | ≤19.9 V - Clamping voltage at 251.3 A surge current; limits voltage seen by downstream components during worst-case transients. |
| TJ max | +185 °C - Maximum junction temperature rating; supports under-hood automotive use and high-ambient industrial environments. |
| Polarity | Unidirectional - Blocks reverse conduction only; requires correct orientation relative to DC bias for effective protection. |
| Package | DO-214AB (SMCJ) - Industry-standard surface-mount outline with cathode band marking; compatible with automated assembly and J-STD-020 reflow profiles. |
Pinout & Package
Package: DO-214AB (SMCJ), molded plastic case with matte tin-plated leads, halogen-free and RoHS-compliant (HM3 suffix), meets UL 94 V-0 flammability rating. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side of protected line (e.g., ground or return path); forms low-impedance shunt during overvoltage events. |
| Cathode | Reverse-biased terminal | Connected to higher-potential side (e.g., supply rail or signal line); blocks conduction until VBR exceeded, then clamps voltage. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier design improves long-term reliability under thermal cycling and humidity exposure. |
| AEC-Q101 qualification | Validated for automotive electronics per stress-test requirements including HTGB, HTRB, and TCT, ensuring robustness in vehicle ECUs. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns rise time), enhancing protection margin for CMOS inputs and gate drivers. |
| MSL Level 1 rating | Allows unlimited floor life and single-reflow processing at peak 260 °C, simplifying SMT manufacturing without dry-pack requirements. |
| High-temperature operation | Guaranteed functionality up to +185 °C junction temperature, supporting placement near power converters or engine control modules. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed microcontroller power supplies from load-dump transients (ISO 7637-2 Pulse 5a). IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between VCC and GND to limit voltage excursion to ≤19.9 V during 100 ms, 120 V surges. Use Value: Prevents latch-up or permanent damage to 5 V/3.3 V regulators and MCU cores without requiring series impedance or additional filtering. |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loop) from ESD and switching noise in factory automation sensors. IC Role / Device Role / Timing Role: TVS placed across signal and return paths to suppress ±8 kV contact ESD (IEC 61000-4-2) and inductive kickback from solenoid drivers. Use Value: Maintains signal integrity below 20 mV error band while surviving >1000 surges with no parameter drift due to junction passivation. |
| Telecom Line Card Surge Protection | Consumer Power Adapter Input Stage |
Use Scenario: Safeguarding PoE-powered Ethernet PHY interfaces against lightning-induced surges on data pairs. IC Role / Device Role / Timing Role: Bidirectional protection not applicable; 5KASMC12AHM3/57 used on DC bias rail feeding isolated DC/DC converter, clamping common-mode surges. Use Value: Enables compliance with GR-1089-CORE Level 3 (10/1000 μs, 100 A) without derating or parallel devices. |
Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters after rectification and bulk capacitance. IC Role / Device Role / Timing Role: Clamps rectified 17 V DC bus during capacitor failure or regulator dropout, limiting stress on downstream LDOs and USB controllers. Use Value: Replaces larger DO-214AA parts with same footprint while delivering 5000 W surge capacity and tighter VBR tolerance (±5.3%). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ12A-E3/57 | Lower PPPM (400 W vs. 5000 W); DO-214AC (SMA) package; VBR = 13.3–14.7 V; same unidirectional polarity. | Targeted for low-energy signal-line protection (e.g., USB, UART), not power-rail surge suppression. | Select when surge energy is <100 mJ and space-constrained layout prohibits DO-214AB. |
| 5.0SMDJ12A | Same 5000 W rating and DO-214AB package; VBR = 13.3–14.7 V; but TJ max = 175 °C (vs. 185 °C) and not AEC-Q101 qualified. | Acceptable for industrial/commercial use where automotive qualification is not required. | Choose for cost-sensitive non-automotive designs needing identical electrical specs but relaxed reliability validation. |
Compared with SMAJ12A-E3/57 and 5.0SMDJ12A, the 5KASMC12AHM3/57 uniquely combines AEC-Q101 qualification, +185 °C junction rating, and full 5000 W surge capability in DO-214AB - making it the only option validated for under-hood automotive power rail protection without derating.
Availability
5KASMC12AHM3/57 is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, telecom line card surge suppression, and consumer power adapter input stage applications requiring stable component supply and long-term lifecycle support.
Supply support for 5KASMC12AHM3/57 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, MOSFETs, and protection devices with emphasis on reliability, thermal performance, and automotive-grade validation.
The 5KASMC12AHM3/57 belongs to Vishay's PAR® (Protection Against Risk) TVS family, engineered specifically for high-energy transient suppression in harsh environments where AEC-Q101 compliance and 185 °C operation are mandatory.
FAQ
What is the maximum clamping voltage of the 5KASMC12AHM3/57 at its rated peak pulse current?
The 5KASMC12AHM3/57 has a maximum clamping voltage (VC) of 19.9 V when subjected to its rated peak pulse current (IPPM) of 251.3 A under a 10/1000 μs waveform. This value is guaranteed per the Vishay datasheet and reflects the upper limit of voltage imposed on protected circuitry during worst-case surge events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is the 5KASMC12AHM3/57 suitable for automotive applications?
Yes, the 5KASMC12AHM3/57 is AEC-Q101 qualified and rated for operation up to +185 °C junction temperature, making it suitable for under-hood automotive applications such as engine control units, body control modules, and ADAS power supplies. Its DO-214AB package and HM3 suffix confirm halogen-free, RoHS-compliant construction aligned with automotive material requirements.
What does the "HM3/57" suffix indicate in 5KASMC12AHM3/57?
The "HM3" suffix denotes Vishay's halogen-free, RoHS-compliant, AEC-Q101-qualified construction with matte tin-plated leads meeting J-STD-002 solderability and JESD 22-B102 whisker resistance standards. The "/57" indicates packaging in 7-inch diameter plastic tape and reel, with a base quantity of 850 units - standard for SMT assembly lines.
How does the 5KASMC12AHM3/57 compare to bidirectional TVS diodes in surge protection?
The 5KASMC12AHM3/57 is unidirectional and intended for DC-biased applications like power rails or positively referenced signal lines. Unlike bidirectional TVS diodes, it cannot suppress symmetrical AC transients. Its advantage lies in lower leakage (<10 μA at 12 V) and tighter VBR tolerance versus bidirectional equivalents - ideal where reverse conduction must be strictly blocked.
What thermal performance can be expected from the 5KASMC12AHM3/57 on a standard PCB?
When mounted on the minimum recommended pad layout per Vishay's datasheet, the 5KASMC12AHM3/57 exhibits a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W. This allows dissipation of its 6.5 W steady-state power rating with moderate temperature rise - sufficient for intermittent surge duty but not continuous high-power operation without additional copper area or thermal vias.
5KASMC12AHM3/57 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):
- 12V
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 19.9V
- Current - Peak Pulse (10/1000µs):
- -
- Power - Peak Pulse:
- 5000W (5kW)
- 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)
5KASMC12AHM3/57 FAQ
1.How can I place an order for 5KASMC12AHM3/57 through Aetrix?
Please submit a Request for Quotation (RFQ) for 5KASMC12AHM3/57 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 5KASMC12AHM3/57 reliable?
The price and inventory of 5KASMC12AHM3/57 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 5KASMC12AHM3/57 is usually 5 days.
3.What payment methods are accepted for 5KASMC12AHM3/57?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 5KASMC12AHM3/57 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 5KASMC12AHM3/57?
5KASMC12AHM3/57 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 5KASMC12AHM3/57 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 5KASMC12AHM3/57?
For technical support, including 5KASMC12AHM3/57 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 5KASMC12AHM3/57 requirements.
6.How does Aetrix verify that 5KASMC12AHM3/57 is sourced from the original manufacturer or authorized distributors?
All 5KASMC12AHM3/57 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 5KASMC12AHM3/57 meets industry standards.
7.What is the process for return or replacement of 5KASMC12AHM3/57?
All 5KASMC12AHM3/57 units undergo pre-shipment inspection (PSI). If there is an issue with 5KASMC12AHM3/57, 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 5KASMC12AHM3/57 part is unused and in its original packaging.
Return procedure for 5KASMC12AHM3/57:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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