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Vishay General Semiconductor - Diodes Division 3KASMC12AHM3/57T
- Part No.:
- 3KASMC12AHM3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC12AHM3/57T.pdf
- Description:
- TVS DIODE 12VWM 19.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,015
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Product details
Overview
3KASMC12AHM3/57T from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, rated for 12 V stand-off voltage, 13.3–14.7 V breakdown at 1 mA, 3000 W peak pulse power (10/1000 μs), 19.9 V clamping voltage at 151 A surge current, and qualified to AEC-Q101 for automotive electronics protection.
For engineers reviewing the 3KASMC12AHM3/57T datasheet, 3KASMC12AHM3/57T pinout, 3KASMC12AHM3/57T application, or 3KASMC12AHM3/57T equivalent, this page delivers verified electrical specs, thermal derating behavior, junction-to-lead resistance, RoHS-compliant packaging, and AEC-Q101 qualification status - all critical for ESD/surge protection design in high-reliability automotive and industrial systems.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology with optimized junction passivation, enabling stable operation up to 185 °C junction temperature and meeting MSL Level 1 (260 °C reflow peak). Its unidirectional polarity and low incremental surge resistance ensure precise clamping during fast transients induced by inductive load switching.
The device delivers 151 A peak pulse current under 10/1000 μs waveform while maintaining 19.9 V clamping voltage, with thermal resistance of 18.3 °C/W (junction-to-leads) and 77.5 °C/W (junction-to-ambient), supporting robust thermal management on standard PCB pad layouts per Vishay's recommended footprint.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - Maximum reverse stand-off voltage before significant leakage; defines safe operating threshold for protected circuitry. |
| VBR (min/max) | 13.3 V / 14.7 V at 1 mA - Confirmed breakdown range ensures reliable turn-on during overvoltage events without premature conduction. |
| VC @ IPPM | 19.9 V at 151 A - Clamping voltage limits downstream voltage stress during 3000 W transient surges. |
| PPPM | 3000 W (10/1000 μs) - Peak pulse power rating validates suitability for severe automotive load-dump and ISO 7637-2 pulse 5a/b immunity. |
| TJ max. | 185 °C - Enables use in under-hood automotive environments and high-temperature industrial control modules. |
| AEC-Q101 | Qualified - Meets stress test requirements for automotive-grade reliability including HTRB, HTGB, and temperature cycling. |
| RθJL | 18.3 °C/W - Low junction-to-lead thermal resistance supports effective heat transfer to PCB copper when mounted per recommended pad layout. |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, matte tin-plated leads, RoHS-compliant, MSL Level 1 (260 °C), cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Surge return path | Connected to ground or low-impedance reference plane; completes clamping loop during transient events. |
| Cathode | Protected line connection / Clamping node | Connected to signal/power line being protected; conducts avalanche current when VWM exceeded. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation optimized design | Enables stable 185 °C operation and long-term reliability under thermal cycling and humidity exposure. |
| 3000 W peak pulse power (10/1000 μs) | Withstands severe automotive load-dump transients without degradation, per ISO 7637-2 Pulse 5. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns response), improving clamping precision. |
| Meets MSL Level 1, 260 °C peak reflow | Compatible with standard lead-free SMT assembly processes without preconditioning or special handling. |
| AEC-Q101 qualification | Validates performance across temperature, life, and mechanical stress tests required for automotive ECUs and sensors. |
Applications
| Automotive Power Distribution | Industrial Motor Drive Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed power rails in body control modules against load-dump transients (ISO 7637-2 Pulse 5a). IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery input and DC-DC converter input stage. Use Value: Limits transient voltage to ≤19.9 V, preventing damage to downstream PMICs and microcontrollers rated for 20 V absolute maximum. |
Use Scenario: Safeguarding gate drivers and current-sense amplifiers in 3-phase inverter stacks from IGBT switching-induced voltage spikes. IC Role / Device Role / Timing Role: Fast-response TVS connected across motor phase outputs and ground to absorb commutation energy. Use Value: Sub-1 ns response time and 151 A surge capability suppress >1 kV spikes before they propagate into analog front-end circuitry. |
| Automotive Sensor Signal Lines | Telecom Power Interface |
Use Scenario: Shielding LIN bus or analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events in vehicle cabins. IC Role / Device Role / Timing Role: Low-capacitance TVS placed inline with signal traces near connector entry points. Use Value: 12 V VWM allows normal signal swing while clamping ±8 kV contact ESD (IEC 61000-4-2) to safe levels below IC input thresholds. |
Use Scenario: Protecting 12 V auxiliary power inputs on telecom base station remote radio units exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary surge suppression stage before DC-DC conversion and LDO regulation. Use Value: 3000 W rating handles multi-kA induced surges per IEC 61000-4-5 (10/700 μs), preserving system uptime in outdoor deployments. |
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-E3/5AT (Vishay) | Same DO-214AC (SMA) package; lower 400 W PPPM; 13.3–14.7 V VBR; 19.9 V VC @ 20.1 A. | Targeted at lower-energy transients (e.g., IEC 61000-4-2 ESD only); insufficient for ISO 7637-2 Pulse 5. | Select when space-constrained layouts require smaller SMA footprint and surge energy is limited to <500 W. |
| 1.5KE12A (ON Semiconductor) | Through-hole DO-201 package; same 12 V VWM, 13.3–14.7 V VBR; 19.9 V VC @ 151 A; 3000 W rating. | Requires through-hole assembly; not suitable for automated SMT lines or high-density boards. | Choose only if legacy through-hole manufacturing infrastructure is fixed and board-level rework is acceptable. |
Compared with SMAJ12A-E3/5AT and 1.5KE12A, the 3KASMC12AHM3/57T uniquely combines SMT-compatible DO-214AB packaging, AEC-Q101 qualification, and full 3000 W surge capability - making it the only option validated for automotive-grade SMT production of high-energy transient protection.
Availability
3KASMC12AHM3/57T is available at Aetrix Electronics and suitable for automotive power distribution, industrial motor drive protection, automotive sensor signal lines, and telecom power interface applications requiring stable component supply, AEC-Q101 compliance, and high-temperature reliability.
Supply support for 3KASMC12AHM3/57T 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, MOSFETs, and protection devices with emphasis on high-reliability, high-temperature, and automotive-qualified components.
The 3KASMC series was engineered specifically for AEC-Q101-compliant transient suppression in harsh automotive and industrial environments, delivering 185 °C operation and 3000 W surge robustness in compact SMC packages.
FAQ
What is the clamping voltage of the 3KASMC12AHM3/57T at its rated peak pulse current?
The 3KASMC12AHM3/57T has a maximum clamping voltage (VC) of 19.9 V at 151 A peak pulse current (IPPM) under a 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in Vishay's datasheet Document Number 89962, ensuring predictable voltage limiting during surge events. The 3KASMC12AHM3/57T maintains this clamping performance across its full operating temperature range.
Is the 3KASMC12AHM3/57T qualified for automotive applications?
Yes, the 3KASMC12AHM3/57T is AEC-Q101 qualified, having passed stress tests including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and temperature cycling. It is rated for continuous operation up to 185 °C junction temperature and meets MSL Level 1 reflow requirements - making the 3KASMC12AHM3/57T suitable for under-hood and safety-critical automotive ECUs.
What package type does the 3KASMC12AHM3/57T use, and what are its key mechanical features?
The 3KASMC12AHM3/57T uses the DO-214AB (SMC) surface-mount package with matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards. Its dimensions are 7.11 × 6.60 × 3.20 mm, and it features a cathode band marking. The 3KASMC12AHM3/57T also meets UL 94 V-0 flammability rating and JESD 201 Class 2 whisker resistance.
How does the 3KASMC12AHM3/57T compare to standard SMAJ-series TVS diodes in surge handling capability?
The 3KASMC12AHM3/57T delivers 3000 W peak pulse power (10/1000 μs), whereas SMAJ-series devices like SMAJ12A offer only 400 W. This 7.5× higher surge rating enables the 3KASMC12AHM3/57T to withstand automotive load-dump events (ISO 7637-2 Pulse 5), which SMAJ parts cannot safely handle. The 3KASMC12AHM3/57T also features superior thermal resistance (RθJL = 18.3 °C/W) versus SMAJ's ~50 °C/W.
What is the maximum reverse leakage current of the 3KASMC12AHM3/57T at its stand-off voltage?
At 12 V stand-off voltage (VWM) and 25 °C ambient, the 3KASMC12AHM3/57T exhibits a maximum reverse leakage current (IR) of 2.0 μA. At elevated temperature (TJ = 150 °C), leakage rises to 20 μA - still well within safe margins for protecting sensitive analog and digital circuits. This low leakage ensures minimal power loss and signal integrity impact in the 3KASMC12AHM3/57T's normal operating state.
3KASMC12AHM3/57T 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):
- 12V
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 19.9V
- Current - Peak Pulse (10/1000µs):
- 151A
- 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)
3KASMC12AHM3/57T FAQ
1.How can I place an order for 3KASMC12AHM3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC12AHM3/57T 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 3KASMC12AHM3/57T reliable?
The price and inventory of 3KASMC12AHM3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3KASMC12AHM3/57T is usually 5 days.
3.What payment methods are accepted for 3KASMC12AHM3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC12AHM3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC12AHM3/57T?
3KASMC12AHM3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC12AHM3/57T 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 3KASMC12AHM3/57T?
For technical support, including 3KASMC12AHM3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC12AHM3/57T requirements.
6.How does Aetrix verify that 3KASMC12AHM3/57T is sourced from the original manufacturer or authorized distributors?
All 3KASMC12AHM3/57T 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 3KASMC12AHM3/57T meets industry standards.
7.What is the process for return or replacement of 3KASMC12AHM3/57T?
All 3KASMC12AHM3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC12AHM3/57T, 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 3KASMC12AHM3/57T part is unused and in its original packaging.
Return procedure for 3KASMC12AHM3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3KASMC12AHM3/57T Tags
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