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Vishay General Semiconductor - Diodes Division 3KASMC11AHM3_B/I
- Part No.:
- 3KASMC11AHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC11AHM3_B/I.pdf
- Description:
- TVS DIODE 11VWM 18.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,509
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Product details
Overview
3KASMC11AHM3_B/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor in SMC (DO-214AB) 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 max junction temperature, and AEC-Q101 qualified for automotive applications.
For engineers reviewing the 3KASMC11AHM3_B/I datasheet, 3KASMC11AHM3_B/I pinout, 3KASMC11AHM3_B/I application, or 3KASMC11AHM3_B/I equivalent, this page delivers verified electrical specs, thermal derating behavior, clamping performance at 165 A IPPM, and direct replacement guidance for high-reliability transient protection in automotive ECUs and industrial sensor interfaces.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology to deliver stable clamping under repetitive surge stress, with junction temperature capability up to 185 °C - enabling operation in under-hood automotive environments without thermal derating penalties below 150 °C. Its low incremental surge resistance and fast response time ensure effective suppression of ESD and load-dump transients.
The device is optimized for unidirectional polarity only and meets MSL Level 1 per J-STD-020 with 260 °C lead-free reflow compatibility. It is halogen-free, RoHS-compliant, and qualified to AEC-Q101 - confirmed by HM3 suffix and ordering code structure in Vishay's official documentation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11 V - maximum reverse voltage before clamping begins; defines safe operating margin for 12 V automotive systems. |
| VBR (min/typ/max) | 12.2 / 12.9 / 13.5 V at 1 mA - tight breakdown tolerance ensures predictable turn-on during transients. |
| VC @ IPPM | 18.2 V at 165 A (10/1000 μs) - low clamping voltage protects downstream MOSFETs and ICs from overvoltage damage. |
| PPPM | 3000 W - enables robust protection against ISO 7637-2 Pulse 1, 2a, 3a/b, and IEC 61000-4-5 surges. |
| TJ max | 185 °C - supports extended high-temperature operation in engine control modules and ADAS sensors. |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 7.11 mm x 6.60 mm body and 3.20 mm height for automated assembly. |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC standard. |
Pinout & Package
Package: SMC (DO-214AB), molded case meeting UL 94 V-0 flammability rating; matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to ground or low-side reference in unidirectional TVS configuration; forms return path for surge current. |
| Cathode | Current exit point during forward conduction; clamping node | Connected to protected line (e.g., CAN_H, LIN, sensor supply); conducts surge current to ground when V > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier process ensures stable VBR drift < ±5 % over 1000 hrs at TJ = 150 °C. |
| Clamping ratio (VC/VBR) | 1.41 (18.2 V / 12.9 V) - low ratio minimizes voltage overshoot during 10/1000 μs transients. |
| Thermal resistance RθJL | 18.3 °C/W - enables efficient heat transfer to PCB copper, supporting sustained 6.0 W power dissipation at TL = 75 °C. |
| Surge current handling | 200 A IFSM (8.3 ms half-sine) - withstands repeated load-dump events without degradation. |
| MSL Level | Level 1 (260 °C peak) - allows single-pass lead-free reflow without moisture sensitivity concerns. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed microcontroller power rails in engine control units from ISO 7637-2 load-dump transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamping element placed between VBAT and GND, activated within < 1 ns upon voltage exceeding VBR. Use Value: Limits peak rail voltage to ≤18.2 V during 3000 W surges, preventing latch-up or permanent damage to 5 V/3.3 V logic supplies. | Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loop) in factory automation transmitters from field-wiring induced surges. IC Role / Device Role / Timing Role: Standoff protector on signal line referenced to local ground, absorbing fast transients while maintaining < 1 μA leakage at 11 V. Use Value: Maintains signal integrity with < 0.5 % gain error impact due to low 1 μA IR at VWM and minimal junction capacitance (~100 pF). |
| Automotive CAN Bus Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Secondary protection on CAN_H/CAN_L lines downstream of common-mode chokes in ADAS camera modules. IC Role / Device Role / Timing Role: Low-capacitance unidirectional clamp referenced to vehicle chassis ground, suppressing ESD and coupled noise. Use Value: Clamps ESD pulses (±25 kV contact) to < 25 V within 1 ns, preserving CAN signal rise/fall times and bit timing accuracy. | Use Scenario: Input-stage surge suppression for BLDC motor drivers in smart home appliances exposed to inductive switching noise. IC Role / Device Role / Timing Role: Primary transient absorber across DC bus input, diverting energy from gate drivers and MCU power supplies. Use Value: Withstands 200 A IFSM surges without parameter shift, ensuring long-term reliability in high-cycle motor start/stop environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ11AHE3_A/H | Lower PPPM (600 W), smaller SMB package (DO-214AA), same VWM/VBR range, non-AEC-Q101. | Not qualified for automotive under-hood use; limited to consumer/industrial board-level protection. | Select when space-constrained layouts require smaller footprint and 600 W surge rating suffices. |
| 1.5KE11A | Through-hole DO-201 package, 1500 W PPPM, higher VF, no AEC-Q101 or MSL-1 qualification. | Requires wave soldering; unsuitable for automated SMT lines or high-reliability automotive programs. | Choose only for legacy through-hole designs where rework flexibility outweighs thermal and reliability constraints. |
Compared with SMBJ11AHE3_A/H and 1.5KE11A, the 3KASMC11AHM3_B/I delivers 5× higher peak pulse power in an automotive-qualified SMC package, enabling single-device protection for ISO 16750-2 load-dump compliance without parallel devices or heatsinking.
Availability
3KASMC11AHM3_B/I is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor transmitters, CAN bus interface modules, and appliance motor drive systems requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 3KASMC11AHM3_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 diodes, rectifiers, TVS devices, and optoelectronics with emphasis on high-reliability, high-temperature, and automotive-grade solutions.
The 3KASMCxxA family was designed specifically for AEC-Q101-compliant transient suppression in harsh automotive environments - delivering 3000 W surge capability, 185 °C junction operation, and halogen-free packaging for next-generation ECU and ADAS platforms.
FAQ
What is the exact breakdown voltage range for 3KASMC11AHM3_B/I at 1 mA test current?
The 3KASMC11AHM3_B/I has a guaranteed breakdown voltage (VBR) range of 12.2 V (minimum) to 13.5 V (maximum) at IT = 1 mA, with a typical value of 12.9 V. This specification is confirmed in Table 1 of Vishay document 88480, revision 19-Jan-2024, and applies directly to the 3KASMC11AHM3_B/I variant as part of the 3KASMC10A–3KASMC43A family.
Is 3KASMC11AHM3_B/I qualified to AEC-Q101, and what does the HM3 suffix indicate?
Yes, 3KASMC11AHM3_B/I is AEC-Q101 qualified. The HM3 suffix denotes halogen-free, RoHS-compliant construction with whisker-resistant matte tin plating and JESD201 Class 2 qualification - explicitly stated in the Mechanical Data section of Vishay document 88480. This makes 3KASMC11AHM3_B/I suitable for automotive under-hood applications requiring long-term reliability.
What is the maximum clamping voltage of 3KASMC11AHM3_B/I under a 10/1000 μs surge, and at what current does it occur?
The maximum clamping voltage (VC) of 3KASMC11AHM3_B/I is 18.2 V, measured at peak pulse current (IPPM) of 165 A using the standardized 10/1000 μs waveform. This value is specified in the Electrical Characteristics table of Vishay document 88480 and reflects worst-case clamping performance under full-rated surge conditions.
Does 3KASMC11AHM3_B/I have a bidirectional configuration option?
No, 3KASMC11AHM3_B/I is unidirectional only. The datasheet explicitly states "Available in uni-directional polarity only" under FEATURES, and all electrical parameters (VWM, VBR, VC) are defined for reverse-biased operation. Bidirectional variants are not offered in the 3KASMCxxA family.
What is the thermal resistance from junction to ambient (RθJA) for 3KASMC11AHM3_B/I in standard mounting conditions?
The typical thermal resistance from junction to ambient (RθJA) for 3KASMC11AHM3_B/I is 77.5 °C/W, measured on the minimum recommended pad layout per JEDEC standards. This value is listed in the Thermal Characteristics section of Vishay document 88480 and assumes standard FR-4 PCB with 1 oz copper and no additional heatsinking.
3KASMC11AHM3_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):
- 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 (SMC)
3KASMC11AHM3_B/I FAQ
1.How can I place an order for 3KASMC11AHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC11AHM3_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 3KASMC11AHM3_B/I reliable?
The price and inventory of 3KASMC11AHM3_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 3KASMC11AHM3_B/I is usually 5 days.
3.What payment methods are accepted for 3KASMC11AHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC11AHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC11AHM3_B/I?
3KASMC11AHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC11AHM3_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 3KASMC11AHM3_B/I?
For technical support, including 3KASMC11AHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC11AHM3_B/I requirements.
6.How does Aetrix verify that 3KASMC11AHM3_B/I is sourced from the original manufacturer or authorized distributors?
All 3KASMC11AHM3_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 3KASMC11AHM3_B/I meets industry standards.
7.What is the process for return or replacement of 3KASMC11AHM3_B/I?
All 3KASMC11AHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC11AHM3_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 3KASMC11AHM3_B/I part is unused and in its original packaging.
Return procedure for 3KASMC11AHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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