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Vishay General Semiconductor - Diodes Division 3KASMC11HE3_A/H
- Part No.:
- 3KASMC11HE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC11HE3_A/H.pdf
- Description:
- TVS DIODE 11VWM 20.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,247
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Product details
Overview
3KASMC11HE3_A/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, rated for 3000 W peak pulse power (10/1000 μs), 12.2–13.5 V breakdown voltage (VBR), and 185 °C maximum junction temperature - designed for automotive-grade overvoltage protection of MOSFETs and sensor signal lines.
For engineers reviewing the 3KASMC11HE3_A/H datasheet, 3KASMC11HE3_A/H pinout, 3KASMC11HE3_A/H application, or 3KASMC11HE3_A/H equivalent, this page delivers verified electrical specs, AEC-Q101 qualification status, clamping performance at 165 A IPPM, thermal resistance (RθJA = 77.5 °C/W), and DO-214AB mechanical layout details required for robust PCB-level surge design.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology to achieve stable clamping under repetitive surge stress and high-temperature operation up to 185 °C. Its unidirectional polarity and low incremental surge resistance ensure fast response (<1 ns) and minimal voltage overshoot during inductive load switching transients.
The device meets MSL Level 1 per J-STD-020 with 260 °C reflow peak, uses matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and is qualified to AEC-Q101 for automotive under-hood applications requiring long-term reliability under thermal cycling and humidity exposure.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 12.2 V / 13.5 V at 1.0 mA test current - defines precise reverse breakdown threshold for reliable triggering before downstream IC damage |
| VWM | 11 V - maximum continuous reverse stand-off voltage; ensures no conduction during normal 12 V system operation |
| VC @ IPPM | 18.2 V at 165 A - clamping voltage limits protected circuit to safe level during 3000 W transient events |
| PPPM | 3000 W (10/1000 μs waveform) - supports high-energy surge suppression in automotive power distribution and motor control |
| IFSM | 200 A (8.3 ms half-sine) - withstands repeated inrush currents without degradation in engine control modules |
| TJ max | 185 °C - enables placement near heat sources (e.g., power converters) without derating in under-hood environments |
| RθJA | 77.5 °C/W - informs thermal pad design for PCB copper area needed to maintain junction temp within limit at 6 W dissipation |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, cathode indicated by color band. Dimensions: 6.22 mm × 5.59 mm × 2.41 mm (L × W × H); recommended pad layout per Vishay spec: 3.20 mm min length, 1.52 mm min width, 4.69 mm max width.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-voltage rail; forms return path during clamping event |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., 12 V supply or sensor output); absorbs transient energy into ground |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, humidity bias, and mechanical shock per JEDEC standards |
| 185 °C junction rating | Enables direct mounting on high-temp PCB zones (e.g., near DC-DC converters) without thermal derating penalties |
| 3000 W peak pulse power | Handles ISO 7637-2 Pulse 5a/b surges and load-dump transients in 12 V vehicle systems |
| Low clamping ratio (VC/VBR ≈ 1.35) | Minimizes overvoltage stress on protected ICs compared to standard TVS devices with higher ratios |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard SMT reflow without baking, reducing manufacturing overhead |
Applications
| Automotive Power Distribution | Engine Control Unit (ECU) Protection |
|---|---|
Use Scenario: Suppressing load-dump transients (up to 60 V, 400 ms) on 12 V battery-fed power rails in body control modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery input and LDO/regulator input to clamp voltage before regulator overvoltage shutdown. Use Value: Prevents regulator latch-up and microcontroller brownout during alternator disconnection events. |
Use Scenario: Protecting CAN transceiver VCC pins and I/O lines from inductive kickback in solenoid driver circuits. IC Role / Device Role / Timing Role: Fast-clamping TVS shunting surge energy away from CAN PHY and MCU GPIO pins during valve actuation. Use Value: Maintains CAN bus integrity and avoids ECU reset caused by >25 V transients exceeding transceiver absolute max ratings. |
| Sensor Signal Line Protection | Industrial Motor Drive Inputs |
Use Scenario: Guarding analog outputs of pressure/temperature sensors against ESD and cable discharge events in HVAC subsystems. IC Role / Device Role / Timing Role: Low-capacitance TVS (CJ < 200 pF) placed at connector interface to attenuate 8 kV contact ESD without distorting 0–5 V sensor signals. Use Value: Preserves signal fidelity while meeting ISO 10605 compliance for in-vehicle sensor interfaces. |
Use Scenario: Safeguarding gate drive inputs of IGBTs in 3-phase inverters from cross-talk and switching noise-induced spikes. IC Role / Device Role / Timing Role: TVS mounted at gate driver IC output to clamp sub-100 ns ringing above 20 V that could cause false turn-on. Use Value: Eliminates unintended IGBT conduction and prevents shoot-through failure in motor control stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ11A | Lower PPPM (400 W), same DO-214AC (SMA) package, VBR = 12.2–13.5 V, but RθJA = 110 °C/W | Not suitable for sustained surge duty cycles or high ambient (>105 °C) locations due to lower power rating and worse thermal resistance | Select SMAJ11A only for cost-sensitive consumer applications with infrequent, low-energy transients and adequate board cooling. |
| 1.5KE11A | Higher PPPM (1500 W), axial-leaded DO-201AD package, VBR = 12.2–13.5 V, but not AEC-Q101 qualified and MSL Level 3 | Requires through-hole assembly and cannot be used in automated SMT lines; unsuitable for automotive production due to qualification gap | Choose 1.5KE11A only for prototyping or industrial equipment where RoHS and AEC compliance are not mandated. |
Compared with SMAJ11A and 1.5KE11A, the 3KASMC11HE3_A/H delivers 7.5× higher peak power handling, 30% better thermal resistance, and full automotive qualification - making it the sole option for production-grade 12 V system surge protection where reliability, SMT compatibility, and thermal margin are non-negotiable.
Availability
3KASMC11HE3_A/H is available at Aetrix Electronics and suitable for automotive power distribution, engine control unit (ECU) protection, sensor signal line hardening, and industrial motor drive input conditioning requiring stable component supply across multi-year production programs.
Supply support for 3KASMC11HE3_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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with emphasis on high-reliability, high-temperature, and automotive-qualified components.
The 3KASMC series belongs to Vishay's PAR® (Protective Anisotropic Rectifier) family, engineered specifically for robust transient suppression in harsh automotive and industrial environments where extended temperature range and AEC-Q101 compliance are mandatory.
FAQ
What is the clamping voltage of the 3KASMC11HE3_A/H at its rated peak pulse current?
The 3KASMC11HE3_A/H has 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 ANSI/IEEE C62.35 and ensures protected circuits remain below critical overvoltage thresholds during standardized surge events. The 3KASMC11HE3_A/H achieves this with low incremental surge resistance, minimizing voltage overshoot beyond VC.
Is the 3KASMC11HE3_A/H suitable for automotive under-hood applications?
Yes, the 3KASMC11HE3_A/H is AEC-Q101 qualified and rated for a maximum junction temperature of 185 °C, making it suitable for under-hood automotive applications such as engine control units, transmission control modules, and battery management systems. Its DO-214AB package and passivated anisotropic rectifier technology provide stability under thermal cycling and high-humidity conditions. The 3KASMC11HE3_A/H also meets MSL Level 1 for lead-free reflow compatibility.
What is the meaning of the "_A/H" suffix in 3KASMC11HE3_A/H?
The "_A/H" suffix in 3KASMC11HE3_A/H indicates packaging configuration: "H" denotes 7-inch diameter plastic tape and reel with 850 units per reel, per Vishay's ordering nomenclature. The "A" refers to the base P/NHM3 revision code, confirming RoHS compliance and AEC-Q101 qualification. The "E3" denotes matte tin plating per JESD 22-B102 whisker testing Class 2. The 3KASMC11HE3_A/H is not a variant of the device's electrical function - all performance specs match the base 3KASMC11A.
How does the thermal resistance of the 3KASMC11HE3_A/H affect PCB layout?
The 3KASMC11HE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 77.5 °C/W, which directly determines required copper area for thermal relief. To sustain 6.0 W continuous power dissipation without exceeding 185 °C junction temperature at 105 °C ambient, ≥250 mm² of 2-oz copper connected to both terminals is recommended. The 3KASMC11HE3_A/H datasheet specifies minimum pad dimensions (3.20 mm × 1.52 mm) to achieve this RθJA value.
Does the 3KASMC11HE3_A/H have bidirectional polarity?
No, the 3KASMC11HE3_A/H is unidirectional only, as confirmed in the Vishay datasheet under FEATURES and PRIMARY CHARACTERISTICS. It conducts in reverse bias during overvoltage events and blocks forward current like a standard diode. For AC line or bidirectional signal protection, a separate bidirectional TVS (e.g., SMBJ11CA) would be required. The 3KASMC11HE3_A/H cathode is marked by a color band and must be oriented toward the protected line's positive side.
3KASMC11HE3_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:
- 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_A/H FAQ
1.How can I place an order for 3KASMC11HE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC11HE3_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 3KASMC11HE3_A/H reliable?
The price and inventory of 3KASMC11HE3_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 3KASMC11HE3_A/H is usually 5 days.
3.What payment methods are accepted for 3KASMC11HE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC11HE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC11HE3_A/H?
3KASMC11HE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC11HE3_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 3KASMC11HE3_A/H?
For technical support, including 3KASMC11HE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC11HE3_A/H requirements.
6.How does Aetrix verify that 3KASMC11HE3_A/H is sourced from the original manufacturer or authorized distributors?
All 3KASMC11HE3_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 3KASMC11HE3_A/H meets industry standards.
7.What is the process for return or replacement of 3KASMC11HE3_A/H?
All 3KASMC11HE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC11HE3_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 3KASMC11HE3_A/H part is unused and in its original packaging.
Return procedure for 3KASMC11HE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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