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Vishay General Semiconductor - Diodes Division 3KASMC11HE3/57T
- Part No.:
- 3KASMC11HE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC11HE3/57T.pdf
- Description:
- TVS DIODE 11VWM 20.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,468
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Product details
Overview
3KASMC11HE3/57T from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, rated for 11 V stand-off voltage (VWM), 12.2–13.5 V breakdown (VBR), 3000 W peak pulse power (10/1000 μs), 185 °C maximum junction temperature, and AEC-Q101 qualified for automotive electronics protection.
For engineers reviewing the 3KASMC11HE3/57T datasheet, 3KASMC11HE3/57T pinout, 3KASMC11HE3/57T application, or 3KASMC11HE3/57T equivalent, this page delivers verified electrical specs, clamping behavior at 165 A IPPM, thermal resistance (RθJA = 77.5 °C/W), polarity marking, and RoHS-compliant SMC packaging - all critical for surge protection design in high-reliability systems.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology to achieve stable clamping under repetitive transients while maintaining low incremental surge resistance and fast response time (<1 ns). Its unidirectional polarity and 185 °C TJ rating support operation in under-hood automotive environments and industrial motor drives where thermal derating is critical.
The device meets MSL Level 1 per J-STD-020 (peak reflow 260 °C), features matte tin-plated leads solderable per J-STD-002, and is qualified to AEC-Q101 - confirming suitability for automotive-grade board-level ESD and load-dump protection without requiring external biasing or control logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11 V - Maximum reverse voltage before clamping begins; defines safe operating window for protected ICs or MOSFET gates. |
| VBR (min/max) | 12.2 V / 13.5 V at 1 mA - Confirmed breakdown threshold ensures predictable turn-on during overvoltage events. |
| PPPM | 3000 W (10/1000 μs) - Absorbs high-energy transients like ISO 7637-2 Pulse 5a without failure. |
| VC @ IPPM | 18.2 V at 165 A - Clamped voltage limits stress on downstream components during worst-case surge. |
| TJ max. | 185 °C - Enables use in high-ambient environments (e.g., engine control units) with validated thermal margin. |
| IR @ VWM | 5.0 μA at 25 °C - Low leakage preserves signal integrity and battery life in always-on circuits. |
| Package | DO-214AB (SMC) - Industry-standard surface-mount outline with 7.11 mm x 6.60 mm footprint and cathode band marking. |
Pinout & Package
DO-214AB (SMC) package with two terminals: anode and cathode. Cathode identified by molded color band. Leads are matte tin-plated, compliant with J-STD-002 solderability and JESD 22-B102 whisker testing (HM3 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward conduction | Connected to ground or low-side return path; defines reference for unidirectional clamping. |
| Cathode | Current exit point in forward conduction; marked with band | Connected to protected line (e.g., CAN_H, LIN, 12 V rail); absorbs positive transients to ground. |
Key Features
| Feature | Design Value |
|---|---|
| 185 °C junction rating | Enables reliable operation in automotive under-hood applications without thermal shutdown or parameter drift. |
| AEC-Q101 qualification | Validates robustness against mechanical shock, temperature cycling, and humidity for automotive production use. |
| 3000 W peak pulse power | Handles ISO 7637-2 load-dump pulses (Pulse 5a) up to 120 V/350 ms without degradation. |
| Low clamping ratio (VC/VBR ≈ 1.35) | Minimizes overvoltage overshoot during fast transients, protecting sensitive gate oxides and interface ICs. |
| MSL Level 1 rating | Allows single-pass reflow at 260 °C peak without popcorn cracking or delamination. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V supply rails in engine control modules (ECMs) from load-dump transients up to 120 V. IC Role / Device Role / Timing Role: Unidirectional TVS clamp referenced to chassis ground, absorbing energy between battery and protected regulator. Use Value: Limits rail voltage to ≤18.2 V during 3000 W surges, preventing damage to LDOs and microcontrollers rated for 20 V absolute max. |
Use Scenario: Safeguarding analog outputs of pressure or temperature sensors connected to PLC I/O cards. IC Role / Device Role / Timing Role: Standoff protector on 4–20 mA current loop lines, triggered only above 12.2 V breakdown. Use Value: Maintains <5 μA leakage at 11 V, avoiding offset errors in precision 16-bit DACs driving sensor excitation. |
| Automotive CAN Bus Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Secondary protection on CAN_H/CAN_L lines in body control modules exposed to ESD and inductive switching noise. IC Role / Device Role / Timing Role: Fast-response unidirectional clamp to ground, placed after common-mode choke and before transceiver. Use Value: Clamps ESD events (IEC 61000-4-2 ±8 kV contact) within <1 ns, preserving signal integrity below 1 Mbps CAN FD timing budgets. |
Use Scenario: Suppressing flyback spikes from brushed DC motors in washing machine control boards. IC Role / Device Role / Timing Role: Parallel-connected TVS across motor terminals to shunt inductive kickback into ground plane. Use Value: Withstands 200 A IFSM (8.3 ms half-sine), enabling repeated motor stall events without parametric shift or bond wire failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ11A | Same DO-214AC (SMA) package; lower PPPM (400 W); VBR = 12.2–13.5 V; RθJA = 110 °C/W | Limited to low-energy transients (e.g., ESD only); unsuitable for load-dump or motor flyback | Select when cost sensitivity outweighs surge energy requirements and board space allows larger thermal pad for SMA. |
| SMCJ11A | Same DO-214AB (SMC) package; identical PPPM (3000 W); VBR = 12.2–13.5 V; TJ max = 175 °C; not AEC-Q101 qualified | Acceptable for industrial but not automotive qualification-critical designs | Choose for non-automotive applications needing same clamping and power rating without AEC-Q101 overhead. |
Compared with SMAJ11A and SMCJ11A, the 3KASMC11HE3/57T uniquely combines AEC-Q101 qualification, 185 °C TJ rating, and DO-214AB packaging - making it the only option among the three validated for under-hood automotive deployment with full load-dump immunity.
Availability
3KASMC11HE3/57T is available at Aetrix Electronics and suitable for automotive power line protection, industrial sensor interface protection, automotive CAN bus protection, and consumer appliance motor drive protection requiring stable component supply and long-term lifecycle continuity.
Supply support for 3KASMC11HE3/57T 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 high-reliability diodes, MOSFETs, and optoelectronics with emphasis on automotive, industrial, and computing markets.
The 3KASMC series belongs to Vishay's PAR® (Protected Automotive Rectifier) family, engineered specifically for AEC-Q101-compliant transient suppression in harsh automotive environments - including engine control, body electronics, and ADAS subsystems.
FAQ
What is the clamping voltage of the 3KASMC11HE3/57T at its rated peak pulse current?
The 3KASMC11HE3/57T exhibits a maximum clamping voltage (VC) of 18.2 V when subjected to its peak pulse current (IPPM) of 165 A under a 10/1000 μs waveform. This value is measured per standard test conditions in the Vishay datasheet (Document Number: 89962) and ensures downstream components remain within safe voltage limits during surge events. The 3KASMC11HE3/57T maintains this clamping performance across its full operating temperature range.
Is the 3KASMC11HE3/57T suitable for automotive applications requiring AEC-Q101 qualification?
Yes, the 3KASMC11HE3/57T is explicitly AEC-Q101 qualified, as confirmed in the Vishay datasheet revision 05-Mar-13 (Document Number: 89962). It meets stress tests for temperature cycling, humidity, mechanical shock, and high-temperature operating life - validating its use in production automotive ECUs, body control modules, and infotainment power supplies. The 3KASMC11HE3/57T also supports MSL Level 1 reflow and operates up to 185 °C junction temperature.
What is the package type and marking code for the 3KASMC11HE3/57T?
The 3KASMC11HE3/57T uses the DO-214AB (SMC) surface-mount package with standardized dimensions (7.11 mm × 6.60 mm) and a visible cathode band. Its marking code is "3AZ", laser-etched on the device body per Vishay's ordering documentation. The "HM3" suffix indicates RoHS compliance and AEC-Q101 qualification, while "/57T" denotes 7-inch tape-and-reel packaging with 850 units per reel.
How does the thermal resistance of the 3KASMC11HE3/57T affect PCB layout decisions?
The 3KASMC11HE3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 77.5 °C/W when mounted on the minimum recommended pad layout. To maintain TJ ≤ 185 °C under 6.0 W continuous dissipation, designers must provide adequate copper area and thermal vias - especially since its junction-to-lead resistance (RθJL) is only 18.3 °C/W. The 3KASMC11HE3/57T benefits from direct thermal coupling to inner-layer ground planes to avoid exceeding thermal limits during repetitive surge events.
Does the 3KASMC11HE3/57T support bidirectional transient suppression?
No, the 3KASMC11HE3/57T is strictly unidirectional, as stated in the Vishay datasheet: "Available in uni-directional polarity only." It clamps positive transients from cathode to anode (i.e., protects lines referenced to ground), and conducts no significant current in reverse bias beyond its specified 5.0 μA leakage at 11 V. For bidirectional protection (e.g., AC lines or differential buses), a separate device such as a 3KASMC11CA or paired unidirectional TVS arrangement is required - the 3KASMC11HE3/57T alone does not fulfill that function.
3KASMC11HE3/57T 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):
- 11V
- Voltage - Breakdown (Min):
- 12.2V
- Voltage - Clamping (Max) @ Ipp:
- 20.1V
- Current - Peak Pulse (10/1000µs):
- 149A
- 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)
3KASMC11HE3/57T FAQ
1.How can I place an order for 3KASMC11HE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC11HE3/57T 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 3KASMC11HE3/57T reliable?
The price and inventory of 3KASMC11HE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3KASMC11HE3/57T is usually 5 days.
3.What payment methods are accepted for 3KASMC11HE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC11HE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC11HE3/57T?
3KASMC11HE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC11HE3/57T 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 3KASMC11HE3/57T?
For technical support, including 3KASMC11HE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC11HE3/57T requirements.
6.How does Aetrix verify that 3KASMC11HE3/57T is sourced from the original manufacturer or authorized distributors?
All 3KASMC11HE3/57T 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 3KASMC11HE3/57T meets industry standards.
7.What is the process for return or replacement of 3KASMC11HE3/57T?
All 3KASMC11HE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC11HE3/57T, 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 3KASMC11HE3/57T part is unused and in its original packaging.
Return procedure for 3KASMC11HE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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