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Vishay General Semiconductor - Diodes Division 3KASMC11AHM3_A/I
- Part No.:
- 3KASMC11AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC11AHM3_A/I.pdf
- Description:
- TVS DIODE 11VWM 18.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,431
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Product details
Overview
3KASMC11AHM3_A/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for high-reliability overvoltage protection in automotive and industrial power rails. It delivers 3000 W peak pulse power (10/1000 μs), clamps at 18.2 V under 165 A surge current, and operates up to 185 °C junction temperature - enabling robust protection of MOSFETs and ICs against inductive switching transients.
For engineers reviewing the 3KASMC11AHM3_A/I datasheet, 3KASMC11AHM3_A/I pinout, 3KASMC11AHM3_A/I application, or 3KASMC11AHM3_A/I equivalent, key selection criteria include its DO-214AB (SMC) package, 11 V stand-off voltage, AEC-Q101 qualification, 17.0–18.2 V breakdown range, and low 1.0 μA leakage at VWM.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology optimized for high-temperature stability and fast response to ESD and surge events. Its unidirectional polarity and 185 °C maximum junction temperature support operation in under-hood automotive environments and industrial motor drive circuits where thermal derating is critical.
The device exhibits low incremental surge resistance and excellent clamping ratio (VC/VBR ≈ 1.43), ensuring predictable voltage limiting during 10/1000 μs transients. It meets J-STD-020 MSL Level 1 and passes JESD201 Class 2 whisker testing, confirming suitability for lead-free reflow assembly without solder joint reliability concerns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11 V - Maximum reverse stand-off voltage before conduction; defines safe operating window for protected circuit. |
| VBR (min/max) | 12.2 V / 13.5 V at 1.0 mA - Confirmed breakdown threshold ensures reliable triggering above normal operating voltage. |
| VC @ IPPM | 18.2 V at 165 A - Clamping voltage limits transient energy delivered to downstream components. |
| PPPM | 3000 W (10/1000 μs) - Sustains high-energy surges common in automotive load-dump and inductive kick scenarios. |
| TJ max. | 185 °C - Enables use in high-ambient-temperature locations without thermal shutdown or degradation. |
| IR @ VWM | 5.0 μA at 25 °C - Ultra-low leakage preserves battery life and signal integrity in always-on systems. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability per stress test requirements including HTGB, HTRB, and TCT. |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, matte tin-plated leads, cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to ground or low-side reference in unidirectional TVS configuration. | Provides return path for surge current; must be routed with low-inductance trace to minimize clamping overshoot. |
| Cathode | Current exit point in forward bias; connected to protected line (e.g., 12 V rail, signal line). | Acts as the "input" terminal for transient energy; color band identifies this terminal for correct PCB orientation. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier process ensures stable VBR and leakage across 185 °C lifetime operation. |
| Peak pulse power | 3000 W (10/1000 μs) supports protection against ISO 7637-2 Pulse 5a (load dump) in 12 V automotive systems. |
| Thermal resistance | RθJA = 77.5 °C/W - Enables effective self-heating management on standard FR-4 with recommended pad layout. |
| MSL rating | Level 1 (J-STD-020), peak reflow ≤ 260 °C - Compatible with standard lead-free SMT processes without moisture sensitivity concerns. |
| Whisker resistance | JESD201 Class 2 compliant - Eliminates risk of tin whisker growth in long-life automotive modules. |
Applications
| Automotive Power Rail Protection | Industrial Motor Drive Control |
|---|---|
|
Use Scenario: Protecting 12 V supply lines in engine control units (ECUs) from load-dump transients up to 35 V and 100 ms duration. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery input and DC-DC converter input stage. Use Value: Clamps transients to ≤18.2 V within nanoseconds, preventing damage to 24 V-rated regulators and microcontrollers. |
Use Scenario: Safeguarding gate drivers and current-sense amplifiers in variable-frequency drives exposed to IGBT switching noise. IC Role / Device Role / Timing Role: Parallel-connected TVS on low-voltage auxiliary rails (e.g., +15 V gate supply). Use Value: Limits coupled spikes to <19 V, preserving gate oxide integrity and avoiding false triggering of protection circuits. |
| Telecom Power Interface | Consumer Appliance Control Board |
|
Use Scenario: Shielding PoE-powered Ethernet switch ports from lightning-induced surges on DC input lines. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 48 V input before DC-DC conversion and isolation. Use Value: Withstands 3000 W pulses while maintaining <5 μA leakage, ensuring no standby power penalty. |
Use Scenario: Guarding microcontroller I/O and relay driver circuits in smart washing machines subject to pump motor commutation noise. IC Role / Device Role / Timing Role: Localized TVS on 5 V/3.3 V rails feeding MCU peripherals and optocouplers. Use Value: Fast response (<1 ns) and low clamping voltage prevent latch-up and reset faults during repeated surge events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ11A-E3/57T (Vishay) | Same DO-214AC (SMA) package; lower PPPM = 400 W; VC = 18.2 V at 22.5 A. | Not AEC-Q101 qualified; rated only to 150 °C TJ; suitable for non-automotive consumer designs. | Select when cost and board space are constrained but 3000 W surge immunity is not required. |
| 1.5KE11A (ON Semiconductor) | Through-hole DO-201AE package; PPPM = 1500 W; VC = 18.2 V at 82.7 A; higher RθJA (~50 °C/W on infinite heatsink). | Lacks MSL Level 1 and JESD201 whisker compliance; unsuitable for automated SMT production. | Choose only for legacy through-hole designs or prototyping where reflow compatibility is not needed. |
Compared with SMAJ11A-E3/57T and 1.5KE11A, the 3KASMC11AHM3_A/I provides triple the peak pulse power in an AEC-Q101-qualified SMT package with superior thermal performance and automotive-grade reliability - making it the preferred choice for production automotive and industrial systems requiring sustained surge resilience.
Availability
3KASMC11AHM3_A/I is available at Aetrix Electronics and suitable for automotive ECUs, industrial motor controllers, telecom power interfaces, and consumer appliance control boards requiring stable component supply and full AEC-Q101 compliance.
Supply support for 3KASMC11AHM3_A/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 passive components for automotive, industrial, and computing markets.
The 3KASMCxxA series was engineered specifically for high-temperature, high-surge automotive power protection - delivering AEC-Q101 qualification, 185 °C operation, and 3000 W pulse capability in the compact DO-214AB package.
FAQ
What is the clamping voltage of the 3KASMC11AHM3_A/I under maximum surge conditions?
The 3KASMC11AHM3_A/I clamps to 18.2 V at its peak pulse current of 165 A (10/1000 μs waveform). This value is measured and guaranteed per the Vishay datasheet (Document Number: 89962), and represents the maximum voltage seen by protected circuitry during worst-case transient events. The low clamping ratio (VC/VBR ≈ 1.43) ensures tight voltage limiting without excessive overshoot.
Is the 3KASMC11AHM3_A/I suitable for automotive under-hood applications?
Yes, the 3KASMC11AHM3_A/I is explicitly AEC-Q101 qualified and rated for continuous operation up to 185 °C junction temperature - exceeding typical under-hood ambient requirements. Its DO-214AB package, MSL Level 1 rating, and JESD201 Class 2 whisker compliance make it appropriate for engine control modules, body control units, and ADAS power supplies where thermal and mechanical reliability are critical.
What does the "_A/I" suffix mean in 3KASMC11AHM3_A/I?
The "_A/I" suffix in 3KASMC11AHM3_A/I indicates the packaging configuration: "I" denotes 13-inch diameter plastic tape and reel with a base quantity of 3500 units. The "HM3" portion confirms RoHS-compliant, AEC-Q101-qualified construction in the DO-214AB (SMC) package, while "A" is the revision code per Vishay's ordering nomenclature (Document Number: 89962, page 3).
How does the 3KASMC11AHM3_A/I compare to standard SMAJ-series TVS diodes?
The 3KASMC11AHM3_A/I delivers 3000 W peak pulse power - 7.5× higher than the 400 W rating of the SMAJ11A - while sharing the same 11 V stand-off and ~18.2 V clamping voltage. It also adds AEC-Q101 qualification, 185 °C operation, and JESD201 Class 2 whisker resistance, which the SMAJ11A lacks. These enhancements make the 3KASMC11AHM3_A/I suitable for mission-critical automotive applications where the SMAJ11A is limited to commercial-grade use.
Does the 3KASMC11AHM3_A/I require a heatsink for standard operation?
No external heatsink is required for the 3KASMC11AHM3_A/I under typical surge duty cycles. Its RθJA of 77.5 °C/W is specified for mounting on the minimum recommended pad layout (per datasheet page 4), and its 6.0 W steady-state power dissipation (PD) is sufficient for most transient-only applications. Thermal design should follow Vishay's recommended copper pad dimensions to ensure proper conduction cooling during repetitive surge events.
3KASMC11AHM3_A/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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 11V
- Voltage - Breakdown (Min):
- 12.2V
- Voltage - Clamping (Max) @ Ipp:
- 18.2V
- Current - Peak Pulse (10/1000µs):
- 165A
- 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)
3KASMC11AHM3_A/I FAQ
1.How can I place an order for 3KASMC11AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC11AHM3_A/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 3KASMC11AHM3_A/I reliable?
The price and inventory of 3KASMC11AHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3KASMC11AHM3_A/I is usually 5 days.
3.What payment methods are accepted for 3KASMC11AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC11AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC11AHM3_A/I?
3KASMC11AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC11AHM3_A/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 3KASMC11AHM3_A/I?
For technical support, including 3KASMC11AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC11AHM3_A/I requirements.
6.How does Aetrix verify that 3KASMC11AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All 3KASMC11AHM3_A/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 3KASMC11AHM3_A/I meets industry standards.
7.What is the process for return or replacement of 3KASMC11AHM3_A/I?
All 3KASMC11AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC11AHM3_A/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 3KASMC11AHM3_A/I part is unused and in its original packaging.
Return procedure for 3KASMC11AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3KASMC11AHM3_A/I Tags
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