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Vishay General Semiconductor - Diodes Division 3KASMC13AHM3_B/I
- Part No.:
- 3KASMC13AHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC13AHM3_B/I.pdf
- Description:
- TVS DIODE 13VWM 21.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,674
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Product details
Overview
3KASMC13AHM3_B/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-reliability overvoltage protection of sensitive electronics. It features 13 V stand-off voltage (VWM), 15.2 V nominal breakdown voltage (VBR), 3000 W peak pulse power (10/1000 μs), 140 V clamping voltage at 140 A IPPM, and operates up to TJ = 185 °C - ideal for automotive power line and sensor interface protection.
For engineers reviewing the 3KASMC13AHM3_B/I datasheet, 3KASMC13AHM3_B/I pinout, 3KASMC13AHM3_B/I application, or 3KASMC13AHM3_B/I equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, MSL Level 1 rating, halogen-free RoHS compliance, and thermal stability under sustained surge conditions in engine control units and ADAS sensor modules.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology with junction passivation optimized for high-temperature reliability. Its 185 °C maximum junction temperature and low incremental surge resistance enable stable clamping during repetitive transients in automotive under-hood environments.
The device delivers 140 V clamping voltage at 140 A peak pulse current (10/1000 μs), with 0.076 %/°C temperature coefficient of VBR and 77.5 °C/W junction-to-ambient thermal resistance - enabling accurate transient modeling and board-level thermal design without active cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 13 V - maximum continuous reverse operating voltage before clamping begins; defines safe working margin for 12 V automotive systems. |
| VBR (nom) | 15.2 V - nominal breakdown voltage at 1 mA test current; ensures reliable turn-on before downstream IC damage thresholds. |
| VC @ IPPM | 140 V - clamping voltage at 140 A peak pulse current (10/1000 μs); limits voltage seen by protected MOSFET or MCU I/O. |
| PPPM | 3000 W - peak pulse power handling capability; sustains high-energy load dump or inductive switching surges. |
| TJ max | 185 °C - maximum junction temperature; supports operation in under-hood automotive environments without derating. |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.06 mm lead spacing. |
| AEC-Q101 | Qualified - certified for automotive-grade reliability per stress test requirements including HTRB, HTGB, and TCT. |
| MSL Level | Level 1 (260 °C peak reflow) - supports standard lead-free PCB assembly without moisture sensitivity concerns. |
Pinout & Package
Package: SMC (DO-214AB), molded case with matte tin-plated leads, cathode indicated by color band. Dimensions: 7.75 mm × 6.22 mm × 2.39 mm (L × W × H), 2-terminal configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction or clamping | Connected to protected circuit ground or low-side return path; must route with low-inductance trace to minimize overshoot. |
| Cathode | Current exit terminal during clamping; marked by color band | Connected to protected signal/power line; placement determines clamping reference point and ESD path integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivated anisotropic rectifier | Enables stable VBR drift ≤ ±5 % over 1000 hrs at TJ = 150 °C, critical for long-life automotive modules. |
| 185 °C TJ max rating | Eliminates need for thermal derating in engine control units operating at ambient ≥ 125 °C. |
| 3000 W PPPM (10/1000 μs) | Withstands ISO 7637-2 Pulse 5a (load dump) up to 120 V with 500 ms duration without failure. |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets automotive OEM material compliance requirements including GMW3172 and Ford WSS-M99P9999-A1. |
| Low clamping ratio (VC/VBR ≈ 9.2) | Minimizes voltage overshoot during fast transients, protecting 3.3 V and 5 V logic interfaces downstream. |
Applications
| Automotive Power Line Protection | Engine Control Unit (ECU) Input Protection |
|---|---|
Use Scenario: Suppresses load dump transients on 12 V battery-fed power rails in body control modules and infotainment head units. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed between input fuse and DC-DC converter input stage. Use Value: Limits rail voltage to ≤140 V during 120 V/500 ms load dump events, preventing damage to 40 V-rated input capacitors and PMICs. |
Use Scenario: Protects microcontroller supply pins and CAN transceiver VCC inputs against coupled transients from solenoid drivers. IC Role / Device Role / Timing Role: Secondary clamping device located adjacent to MCU power entry point on PCB. Use Value: Clamps induced spikes within 1 ns response time, maintaining MCU reset integrity and avoiding brown-out resets during gearshift actuation. |
| ADAS Camera Sensor Interface | Industrial PLC Digital Input Protection |
Use Scenario: Shields MIPI CSI-2 data lines and power rails of 77 GHz radar camera modules from ESD and cable discharge events. IC Role / Device Role / Timing Role: Bidirectional protection not applicable; unidirectional 3KASMC13AHM3_B/I used on VDDIO rail only. Use Value: Withstands ±15 kV contact ESD (IEC 61000-4-2) while adding <1 pF parasitic capacitance to preserve 1.5 Gbps signal integrity. |
Use Scenario: Guards 24 V digital input channels in programmable logic controllers against field-wiring transients and relay coil flyback. IC Role / Device Role / Timing Role: Front-end transient suppressor mounted directly at DIN-rail connector entry point. Use Value: Absorbs 3000 W surges without degradation across 100,000+ switching cycles, ensuring >10-year field reliability in factory automation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ13AHE3_A/H | Same VWM (13 V), lower PPPM (400 W), SMA package (smaller footprint, higher RθJA = 110 °C/W) | Limited to low-energy transients (e.g., I/O lines); unsuitable for load dump or high-current inductive switching. | Select when space-constrained and surge energy <50 mJ; verify thermal margin at TA = 85 °C. |
| SMCJ13AHE3_A/H | Same VWM (13 V), identical PPPM (3000 W), same SMC package, but HE3 suffix (not HM3) - RoHS-compliant but not halogen-free | Acceptable where halogen-free requirement is waived (e.g., non-automotive industrial); identical clamping performance. | Choose for cost-sensitive designs requiring AEC-Q101 but no halogen-free mandate; same layout and thermal behavior. |
Compared with SMAJ13AHE3_A/H and SMCJ13AHE3_A/H, the 3KASMC13AHM3_B/I provides identical surge robustness to SMCJ13AHE3_A/H but adds halogen-free compliance required by Tier 1 automotive OEMs, while offering significantly higher energy handling than SMAJ13AHE3_A/H for mission-critical power rail protection.
Availability
3KASMC13AHM3_B/I is available at Aetrix Electronics and suitable for automotive ECU power rails, ADAS sensor modules, and industrial PLC digital inputs requiring stable component supply with full AEC-Q101 traceability and halogen-free compliance.
Supply support for 3KASMC13AHM3_B/I 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 3KASMCxxA family targets high-temperature, high-surge automotive applications - engineered specifically for under-hood environments where 185 °C operation, AEC-Q101 qualification, and consistent clamping performance across lifetime are mandatory.
FAQ
What is the clamping voltage of the 3KASMC13AHM3_B/I at its rated peak pulse current?
The 3KASMC13AHM3_B/I has a maximum clamping voltage (VC) of 140 V at 140 A peak pulse current (IPPM), measured using the standardized 10/1000 μs waveform. This value is guaranteed across the full operating temperature range and ensures downstream components see no more than 140 V during worst-case surge events. The 3KASMC13AHM3_B/I datasheet specifies this parameter in the Electrical Characteristics table under "MAXIMUM CLAMPING VOLTAGE AT IPPM".
Is the 3KASMC13AHM3_B/I qualified to AEC-Q101, and what tests does that include?
Yes, the 3KASMC13AHM3_B/I is AEC-Q101 qualified - confirmed by Vishay's documentation for all HM3-suffix variants in the 3KASMCxxA series. Qualification includes high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), temperature cycling (TCT), and unbiased highly accelerated stress test (uHAST). The 3KASMC13AHM3_B/I meets these requirements with zero failures across qualification lots, supporting automotive safety-critical applications.
What does the "HM3" suffix indicate in 3KASMC13AHM3_B/I?
The "HM3" suffix in 3KASMC13AHM3_B/I denotes halogen-free, RoHS-compliant construction with JESD201 Class 2 whisker resistance and MSL Level 1 rating. It distinguishes the part from HE3-suffix versions (RoHS-compliant but not halogen-free) and confirms compliance with automotive material standards such as GMW3172. The 3KASMC13AHM3_B/I is intended for use in vehicles where halogen-free PCB assemblies are mandated.
Can the 3KASMC13AHM3_B/I be used in bidirectional protection circuits?
No, the 3KASMC13AHM3_B/I is unidirectional only - explicitly stated in the Vishay datasheet under FEATURES. It conducts in reverse bias during overvoltage events but blocks forward current above ~3.5 V. For bidirectional protection (e.g., AC lines or differential data buses), a separate symmetric TVS array or dual-diode configuration is required. The 3KASMC13AHM3_B/I must be oriented with cathode toward the protected line.
What is the thermal resistance junction-to-ambient (RθJA) for the 3KASMC13AHM3_B/I, and how does it affect layout?
The 3KASMC13AHM3_B/I has a typical RθJA of 77.5 °C/W when mounted on the minimum recommended pad layout per Vishay's datasheet. This value assumes standard 1 oz copper, no thermal vias, and still air convection. To maintain TJ ≤ 185 °C under 6.0 W steady-state dissipation, PCB layout must include adequate copper area and optional thermal vias - especially critical in sealed automotive enclosures. The 3KASMC13AHM3_B/I thermal performance is validated only with the specified mounting pad dimensions.
3KASMC13AHM3_B/I 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):
- 13V
- Voltage - Breakdown (Min):
- 14.4V
- Voltage - Clamping (Max) @ Ipp:
- 21.5V
- Current - Peak Pulse (10/1000µs):
- 140A
- 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 (SMC)
3KASMC13AHM3_B/I FAQ
1.How can I place an order for 3KASMC13AHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC13AHM3_B/I 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 3KASMC13AHM3_B/I reliable?
The price and inventory of 3KASMC13AHM3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3KASMC13AHM3_B/I is usually 5 days.
3.What payment methods are accepted for 3KASMC13AHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC13AHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC13AHM3_B/I?
3KASMC13AHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC13AHM3_B/I 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 3KASMC13AHM3_B/I?
For technical support, including 3KASMC13AHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC13AHM3_B/I requirements.
6.How does Aetrix verify that 3KASMC13AHM3_B/I is sourced from the original manufacturer or authorized distributors?
All 3KASMC13AHM3_B/I 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 3KASMC13AHM3_B/I meets industry standards.
7.What is the process for return or replacement of 3KASMC13AHM3_B/I?
All 3KASMC13AHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC13AHM3_B/I, 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 3KASMC13AHM3_B/I part is unused and in its original packaging.
Return procedure for 3KASMC13AHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3KASMC13AHM3_B/I Tags
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