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Vishay General Semiconductor - Diodes Division 5KASMC12AHM3_A/H
- Part No.:
- 5KASMC12AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
5KASMC12AHM3_A/H.pdf
- Description:
- TVS DIODE 12VWM 19.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:810
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Product details
Overview
5KASMC12AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for high-reliability clamping of inductive switching transients and ESD events on power rails and signal lines. It delivers 5000 W peak pulse power (10/1000 μs), clamps at ≤19.9 V under 251.3 A surge current, and operates up to TJ = 185 °C - making it suitable for automotive powertrain control units, industrial motor drives, and automotive sensor interface protection.
For engineers reviewing the 5KASMC12AHM3_A/H datasheet, 5KASMC12AHM3_A/H pinout, 5KASMC12AHM3_A/H application, or 5KASMC12AHM3_A/H equivalent, key selection criteria include its 12 V stand-off voltage, 13.3–14.7 V breakdown range at 1 mA, 20 μA max reverse leakage at VWM, SMC (DO-214AB) package thermal performance, and AEC-Q101 qualification for automotive deployment.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to achieve low incremental surge resistance and excellent clamping linearity under high-current transients. Its junction passivation enables stable operation at TJ = 185 °C and supports MSL Level 1 reflow compatibility with 260 °C peak temperature.
The device exhibits a positive temperature coefficient of VBR (0.074 %/°C), enabling predictable voltage drift over temperature. It is rated for non-repetitive 10/1000 μs surges only, with derating above TA = 25 °C per published curves - requiring thermal design consideration when mounted on minimum pad layout (RθJA = 100 °C/W).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - maximum continuous reverse working voltage before significant leakage; defines safe operating rail margin |
| VBR (min/typ/max) | 13.3 / 14.0 / 14.7 V at IT = 1 mA - ensures reliable turn-on during overvoltage events without false triggering |
| VC at IPPM | 19.9 V at 251.3 A - clamping voltage under full-rated 5000 W surge; determines protected circuit's peak stress level |
| PPPM (10/1000 μs) | 5000 W - peak transient energy absorption capability; validates suitability for ISO 7637-2 Pulse 5a/b and IEC 61000-4-5 Level 4 |
| IR at VWM | ≤20 μA at 25 °C - low leakage preserves system standby power integrity in battery-critical applications |
| TJ max | +185 °C - enables placement near high-temperature components (e.g., power MOSFETs, gate drivers) without derating |
| AEC-Q101 | Qualified - meets stress test requirements for automotive electronic modules including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads; cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current sink during clamping | Connected to protected line (e.g., 12 V rail); conducts surge current to ground path when V > VBR |
| Cathode | Reference terminal / clamping node | Typically tied to system ground or low-impedance return; defines polarity and clamping reference point |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivated anisotropic rectifier | Enables stable VBR and low leakage across -65 °C to +185 °C; eliminates parametric shift after thermal cycling |
| MSL Level 1 (260 °C peak) | Supports single-reflow assembly without moisture-induced popcorn failure; no baking required pre-assembly |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., relay coil de-energization), improving clamping fidelity |
| Halogen-free & RoHS-compliant HM3 suffix | Fulfills automotive OEM material compliance requirements (e.g., GMW3172, Ford WSS-M99P9999-A1) |
| Color-banded cathode marking | Enables rapid visual polarity verification during manual inspection and automated optical inspection (AOI) |
Applications
| Automotive Powertrain Control | Industrial Motor Drive Protection |
|---|---|
Use Scenario: Suppressing load dump and inductive kickback from fuel injector solenoids and ignition coils in engine control units (ECUs). IC Role / Device Role / Timing Role: Primary clamping element on 12 V supply rail upstream of LDOs and microcontrollers. Use Value: Limits rail voltage to ≤19.9 V during 5000 W transients, preventing latch-up or permanent damage to downstream ASICs. |
Use Scenario: Protecting gate driver ICs and current-sense amplifiers from flyback spikes generated by IGBTs in variable-frequency drives. IC Role / Device Role / Timing Role: Fast-response shunt clamp on isolated DC bus sensing lines and auxiliary power rails. Use Value: Responds within nanoseconds to clamp 10/1000 μs surges, preserving signal integrity and avoiding false fault detection. |
| Automotive Sensor Interface | Telecom Power Supply Input |
Use Scenario: Guarding LIN/CAN transceiver inputs and analog sensor outputs (e.g., pressure, temperature) against ESD and cable discharge events. IC Role / Device Role / Timing Role: Secondary-level protection placed after primary common-mode chokes and before signal conditioning stages. Use Value: Withstands ±30 kV contact ESD (IEC 61000-4-2) while maintaining <20 μA leakage at 12 V, ensuring sensor offset stability. |
Use Scenario: Safeguarding AC/DC front-end rectifiers and PFC controllers in telecom rectifier modules exposed to lightning-induced surges. IC Role / Device Role / Timing Role: First-line transient suppression on 48 V DC input bus prior to bulk capacitance and regulation stages. Use Value: Absorbs 5000 W pulses without degradation, meeting Telcordia GR-1089-CORE Level 4 immunity requirements. |
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-E3/5A (Vishay) | Lower PPPM (400 W), smaller SMA package (DO-214AC), same VWM/VBR range but lower surge current rating (32.4 A) | Suitable for low-energy signal-line protection; insufficient for 12 V rail-level load dump | Select 5KASMC12AHM3_A/H when ≥5000 W clamping and AEC-Q101 qualification are mandatory |
| 1.5KE12A (ON Semiconductor) | Through-hole DO-201 package, higher RθJA (~65 °C/W on infinite heatsink), not AEC-Q101 qualified | Acceptable for industrial non-automotive use; requires PCB real estate and wave soldering | Choose 5KASMC12AHM3_A/H for SMT automation, automotive qualification, and superior thermal performance in confined layouts |
Compared with SMAJ12A-E3/5A and 1.5KE12A, the 5KASMC12AHM3_A/H provides 12.5× higher peak pulse power in an AEC-Q101-qualified SMT package, enabling compact, high-reliability protection for automotive and industrial power rails where thermal management and surge robustness are critical.
Availability
5KASMC12AHM3_A/H is available at Aetrix Electronics and suitable for automotive powertrain modules, industrial motor drives, telecom rectifier inputs, and sensor interface circuits requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 5KASMC12AHM3_A/H 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 5KASMCxxA family was engineered specifically for high-temperature, high-surge automotive and industrial environments - delivering robust transient suppression where traditional TVS devices fail due to thermal instability or insufficient energy handling.
FAQ
What is the maximum clamping voltage of the 5KASMC12AHM3_A/H under full-rated surge current?
The 5KASMC12AHM3_A/H has a maximum clamping voltage (VC) of 19.9 V when subjected to its peak pulse current (IPPM) of 251.3 A with a 10/1000 μs waveform. This value is measured per Figure 1 in the official Vishay datasheet (Doc. #89432) and defines the upper voltage limit imposed on protected circuitry during worst-case transients. The 5KASMC12AHM3_A/H maintains this clamping performance across its full operating temperature range.
Is the 5KASMC12AHM3_A/H qualified for automotive applications?
Yes, the 5KASMC12AHM3_A/H is AEC-Q101 qualified - verified per the full stress test suite including high-temperature reverse bias (HTRB), temperature cycling, and ESD. Its TJ max of +185 °C and MSL Level 1 reflow rating further support deployment in engine compartments and transmission control modules. The 5KASMC12AHM3_A/H is explicitly listed in Vishay's AEC-Q101 qualified product matrix for transient suppressors.
What does the "HM3_A/H" suffix indicate in 5KASMC12AHM3_A/H?
The "HM3" denotes Vishay's halogen-free, RoHS-compliant, AEC-Q101-qualified SMC package variant with matte tin plating and JESD201 Class 2 whisker resistance. "_A/H" specifies the revision code (A) and packaging format: 7-inch plastic tape and reel, 850 units per reel. This exact ordering code ensures traceable, production-ready delivery of the 5KASMC12AHM3_A/H with documented compliance and thermal performance.
Can the 5KASMC12AHM3_A/H be used in bidirectional configurations?
No, the 5KASMC12AHM3_A/H is unidirectional only - optimized for clamping positive transients on grounded systems. Its datasheet explicitly states "Available in unidirectional polarity only", and the device lacks symmetrical breakdown characteristics. For bidirectional protection, Vishay offers separate part numbers such as 5KASMC12CA; the 5KASMC12AHM3_A/H must be used with correct cathode-to-ground orientation.
What is the thermal resistance of the 5KASMC12AHM3_A/H when mounted on a standard PCB pad layout?
When mounted on Vishay's minimum recommended pad layout, the 5KASMC12AHM3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W. This value is critical for calculating steady-state junction temperature rise under DC power dissipation (PD = 6.5 W). The 5KASMC12AHM3_A/H's RθJM of 20.8 °C/W (junction-to-mount) supports enhanced cooling when soldered to thermally robust copper planes or heatsinks.
5KASMC12AHM3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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_A/H FAQ
1.How can I place an order for 5KASMC12AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 5KASMC12AHM3_A/H 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_A/H reliable?
The price and inventory of 5KASMC12AHM3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 5KASMC12AHM3_A/H is usually 5 days.
3.What payment methods are accepted for 5KASMC12AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 5KASMC12AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 5KASMC12AHM3_A/H?
5KASMC12AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 5KASMC12AHM3_A/H 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_A/H?
For technical support, including 5KASMC12AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 5KASMC12AHM3_A/H requirements.
6.How does Aetrix verify that 5KASMC12AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All 5KASMC12AHM3_A/H 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_A/H meets industry standards.
7.What is the process for return or replacement of 5KASMC12AHM3_A/H?
All 5KASMC12AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 5KASMC12AHM3_A/H, 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_A/H part is unused and in its original packaging.
Return procedure for 5KASMC12AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
5KASMC12AHM3_A/H Tags
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