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Vishay General Semiconductor - Diodes Division 3KASMC22AHM3_A/H
- Part No.:
- 3KASMC22AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC22AHM3_A/H.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,013
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Product details
Overview
3KASMC22AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount PAR® Transient Voltage Suppressor (TVS) diode in DO-214AB (SMC) package, rated for 3000 W peak pulse power (10/1000 μs), 22 V stand-off voltage (VWM), 24.4–26.9 V breakdown voltage (VBR), and 185 °C maximum junction temperature - deployed for automotive-grade overvoltage protection of MOSFETs and sensor signal lines.
For engineers reviewing the 3KASMC22AHM3_A/H datasheet, 3KASMC22AHM3_A/H pinout, 3KASMC22AHM3_A/H application, or 3KASMC22AHM3_A/H equivalent, key selection criteria include clamping voltage (35.5 V at IPPM), AEC-Q101 qualification, MSL Level 1 rating, unidirectional polarity, and thermal resistance (RθJA = 77.5 °C/W).
Technical Context
This TVS diode employs passivated anisotropic rectifier technology to achieve stable clamping under high-temperature stress (TJ up to 185 °C) and fast transient response with low incremental surge resistance. Its unidirectional architecture provides robust protection against positive-going transients on DC-biased lines.
Designed for automotive and industrial environments, it meets JESD22-B102 solderability standards and JESD201 Class 2 whisker resistance, with matte tin-plated leads and UL 94 V-0 molding compound. The DO-214AB package enables high-power dissipation (6.0 W) on infinite heatsink at TL = 75 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR (min/max) | 24.4 V / 26.9 V at 1 mA - Ensures reliable breakdown onset within defined tolerance band |
| VC @ IPPM | 35.5 V - Clamping voltage during 84.5 A peak pulse (10/1000 μs), limiting downstream voltage stress |
| PPPM | 3000 W - Peak pulse power handling capability per standard 10/1000 μs waveform |
| TJ max. | 185 °C - Enables operation in under-hood automotive and high-ambient industrial environments |
| RθJA | 77.5 °C/W - Thermal resistance from junction to ambient, critical for PCB layout and derating design |
| AEC-Q101 | Qualified - Meets stress test requirements for automotive electronic components |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, cathode indicated by color band. Dimensions: 7.11 mm × 6.60 mm × 2.90 mm (L × W × H). RoHS-compliant, UL 94 V-0 rated molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to lower-potential side of protected line; defines unidirectional clamping direction |
| Cathode | Current exit terminal during forward conduction; marked with band | Connected to higher-potential side (e.g., VCC rail); determines polarity and clamping reference |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier process ensures stable leakage and breakdown behavior across temperature and life cycle |
| High-temperature operation | Rated for continuous operation up to TJ = 185 °C - supports placement near heat sources in automotive ECUs |
| Clamping performance | Low VC/VBR ratio (≈1.45) delivers tight voltage limiting with minimal overshoot during ESD/EFT events |
| Surge robustness | 200 A IFSM (8.3 ms half-sine) withstands repetitive load-dump and inductive switching surges without degradation |
| Manufacturing compliance | MSL Level 1 (260 °C peak reflow), JESD201 Class 2 whisker resistance, and matte tin plating ensure assembly reliability |
Applications
| Automotive Powertrain Control | Industrial Motor Drive Protection |
|---|---|
|
Use Scenario: Protecting gate drivers and current-sense amplifiers in engine control units exposed to load-dump transients (ISO 7637-2 Pulse 5a). IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed at MOSFET gate-source and supply rails. Use Value: Limits transient voltage to ≤35.5 V, preventing gate oxide rupture and ensuring AEC-Q101-compliant system-level robustness. |
Use Scenario: Safeguarding microcontroller I/O and analog front-end inputs in variable-frequency drives subjected to inductive kickback. IC Role / Device Role / Timing Role: Standoff-clamp TVS on 24 V auxiliary supply and sensor signal paths (e.g., Hall-effect feedback). Use Value: Withstands 3000 W pulses while maintaining <1 μA leakage at 22 V, preserving signal integrity and low-power sleep modes. |
| Automotive ADAS Sensor Interface | Telecom Power Supply Input |
|
Use Scenario: Shielding camera module LVDS lines and radar transceiver bias supplies from ESD and cable discharge events. IC Role / Device Role / Timing Role: High-speed unidirectional clamp on 3.3 V/5 V bias rails and differential pairs. Use Value: 35.5 V clamping voltage prevents latch-up in image sensors; DO-214AB footprint allows compact placement near connectors. |
Use Scenario: Front-end transient suppression on 48 V telecom power supplies subject to lightning-induced surges (IEC 61000-4-5). IC Role / Device Role / Timing Role: Primary-level TVS on DC input bus upstream of DC/DC converters. Use Value: 84.5 A IPPM rating handles 2 kV/2 Ω surge waveforms; RθJA = 77.5 °C/W enables thermal management without heatsinks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22A | Lower PPPM (400 W), same VWM (22 V), higher VC (35.5 V), DO-214AC (SMA) package | Not AEC-Q101 qualified; suitable for non-automotive consumer/industrial use only | Select when cost sensitivity outweighs automotive qualification and surge margin requirements |
| SMCJ22A | Same PPPM (3000 W), identical VWM/VBR/VC specs, DO-214AB (SMC) package, AEC-Q101 qualified | Identical electrical and mechanical performance; differs only in Vishay part numbering convention and traceability coding | Preferred drop-in alternative with identical form, fit, and function - verify packaging suffix (HM3 vs. standard SMCJ) |
Compared with SMAJ22A and SMCJ22A, the 3KASMC22AHM3_A/H offers guaranteed AEC-Q101 qualification, tighter VBR tolerance (24.4–26.9 V vs. ±5 %), and HM3 suffix indicating enhanced whisker resistance - making it optimal for safety-critical automotive deployments where long-term reliability under thermal cycling is mandatory.
Availability
3KASMC22AHM3_A/H is available at Aetrix Electronics and suitable for automotive powertrain control, industrial motor drive protection, ADAS sensor interface, and telecom power supply input applications requiring stable component supply, full traceability, and lifecycle continuity.
Supply support for 3KASMC22AHM3_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 is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and TVS devices with emphasis on high-reliability, high-temperature, and automotive-qualified solutions.
The 3KASMC series belongs to Vishay's PAR® family of high-power TVS diodes, engineered specifically for AEC-Q101-compliant transient suppression in harsh-environment automotive and industrial systems where 185 °C operation and 3000 W surge immunity are required.
FAQ
What is the clamping voltage of the 3KASMC22AHM3_A/H under peak surge conditions?
The 3KASMC22AHM3_A/H exhibits a maximum clamping voltage (VC) of 35.5 V when subjected to its rated peak pulse current (IPPM = 84.5 A) using the standard 10/1000 μs waveform. This value is measured at TJ = 25 °C and defines the upper voltage limit imposed on protected circuitry during transient events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is the 3KASMC22AHM3_A/H qualified for automotive applications?
Yes, the 3KASMC22AHM3_A/H is AEC-Q101 qualified, meaning it has passed rigorous stress tests including high-temperature operating life, temperature cycling, and humidity testing required for automotive electronic components. Its 185 °C maximum junction temperature and DO-214AB package construction further support deployment in engine control, ADAS, and body electronics modules.
What does the "HM3" suffix indicate in 3KASMC22AHM3_A/H?
The "HM3" suffix in 3KASMC22AHM3_A/H denotes Vishay's RoHS-compliant, AEC-Q101-qualified variant with enhanced reliability features: matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and JESD 201 Class 2 whisker resistance. The "_A/H" indicates 7-inch tape-and-reel packaging (850 units per reel) with revision code A.
How does the thermal performance of the 3KASMC22AHM3_A/H compare to similar TVS diodes?
The 3KASMC22AHM3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 77.5 °C/W, measured on the minimum recommended pad layout. This value is competitive among DO-214AB-packaged 3000 W TVS diodes and enables effective thermal management without external heatsinking - especially important in densely packed automotive PCBs where airflow is limited.
Can the 3KASMC22AHM3_A/H replace the SMAJ22A in existing designs?
No direct replacement: while both share VWM = 22 V and VC = 35.5 V, the 3KASMC22AHM3_A/H delivers 3000 W peak pulse power versus SMAJ22A's 400 W, uses DO-214AB (not DO-214AC), and is AEC-Q101 qualified. Substitution requires layout review due to larger SMC footprint and validation of surge margin uplift in the target application.
3KASMC22AHM3_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):
- 22V
- Voltage - Breakdown (Min):
- 24.4V
- Voltage - Clamping (Max) @ Ipp:
- 35.5V
- Current - Peak Pulse (10/1000µs):
- 84.5A
- 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)
3KASMC22AHM3_A/H FAQ
1.How can I place an order for 3KASMC22AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC22AHM3_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 3KASMC22AHM3_A/H reliable?
The price and inventory of 3KASMC22AHM3_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 3KASMC22AHM3_A/H is usually 5 days.
3.What payment methods are accepted for 3KASMC22AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC22AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC22AHM3_A/H?
3KASMC22AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC22AHM3_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 3KASMC22AHM3_A/H?
For technical support, including 3KASMC22AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC22AHM3_A/H requirements.
6.How does Aetrix verify that 3KASMC22AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All 3KASMC22AHM3_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 3KASMC22AHM3_A/H meets industry standards.
7.What is the process for return or replacement of 3KASMC22AHM3_A/H?
All 3KASMC22AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC22AHM3_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 3KASMC22AHM3_A/H part is unused and in its original packaging.
Return procedure for 3KASMC22AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3KASMC22AHM3_A/H Tags
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