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Vishay General Semiconductor - Diodes Division 3KASMC22AHE3_A/H
- Part No.:
- 3KASMC22AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC22AHE3_A/H.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,881
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Product details
Overview
3KASMC22AHE3_A/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in DO-214AB (SMC) package, rated for 22 V stand-off voltage (VWM), 24.4–26.9 V breakdown (VBR), 3000 W peak pulse power (10/1000 μs), 84.5 A peak surge current (IPPM), and 35.5 V clamping voltage (VC) - designed for automotive-grade overvoltage protection of power rails and signal lines.
For engineers reviewing the 3KASMC22AHE3_A/H datasheet, 3KASMC22AHE3_A/H pinout, 3KASMC22AHE3_A/H application, or 3KASMC22AHE3_A/H equivalent, this page delivers verified electrical specs, AEC-Q101 qualification status, thermal resistance (RθJA = 77.5 °C/W), junction temperature capability up to +185 °C, and real-world clamping performance under transient stress.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology optimized for high-temperature stability and low incremental surge resistance. Its unidirectional polarity enables robust forward conduction during clamping while maintaining tight VBR tolerance (±5%) and low leakage (≤1.0 μA at VWM).
Rated for 3000 W peak pulse power with 10/1000 μs waveform and 200 A non-repetitive forward surge (IFSM), it operates across -65 °C to +185 °C junction range and meets MSL Level 1 (260 °C reflow peak), supporting automotive and industrial applications requiring long-term reliability under thermal cycling.
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 - precise breakdown threshold ensuring predictable turn-on during transients |
| VC @ IPPM | 35.5 V at 84.5 A - clamping voltage limits downstream IC stress during 3000 W surge events |
| PPPM | 3000 W (10/1000 μs) - handles high-energy lightning or load-dump surges without failure |
| TJ max. | +185 °C - supports under-hood automotive placement and extended thermal margin |
| RθJA | 77.5 °C/W - defines thermal rise per watt dissipated in standard PCB layout (no heatsink) |
| AEC-Q101 | Qualified - validated for automotive electronics per stress test requirements (HTOL, TCT, etc.) |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, matte tin-plated leads, RoHS-compliant, UL 94 V-0 molding compound, cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / clamping return path | Connected to protected circuit ground or low-side reference; completes clamping loop during overvoltage |
| Cathode | Transient voltage sensing / clamping output | Connected to line being protected; conducts when reverse voltage exceeds VBR, shunting surge to ground |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier structure ensures stable VBR and low leakage over lifetime and temperature |
| High-temperature operation | TJ up to +185 °C enables use in engine control units, ADAS modules, and other high-ambient environments |
| Low clamping ratio | VC/VBR ≈ 1.39 - tight clamping margin minimizes overvoltage exposure to downstream MOSFETs or ICs |
| Fast response time | <1 ns - reacts before most semiconductor damage thresholds are exceeded during ESD or EFT events |
| MSL Level 1 rating | Compatible with standard SMT reflow profiles up to 260 °C peak, no dry-pack required |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V supply lines in body control modules against ISO 7637-2 load dump transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between battery rail and DC-DC input. Use Value: Limits voltage to ≤35.5 V during 3000 W surges, preventing damage to buck converter ICs rated for 40 V max input. |
Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: Line-side transient suppressor on 0–10 V or 4–20 mA signal paths. Use Value: Clamps fast-rising EFT bursts (IEC 61000-4-4) with sub-ns response, preserving signal integrity and ADC accuracy. |
| Telecom DC Power Input Protection | Consumer Device USB Power Path Protection |
Use Scenario: Securing -48 V telecom rectifier outputs against lightning-induced surges on central office equipment. IC Role / Device Role / Timing Role: Primary-level TVS on DC input bus prior to hot-swap controller and filter stage. Use Value: Withstands repeated 10/1000 μs surges up to 84.5 A, maintaining clamping performance after >1000 events per JEDEC JESD22-A114. |
Use Scenario: Adding robust overvoltage protection on USB-C VBUS lines in portable docking stations. IC Role / Device Role / Timing Role: Secondary protection device downstream of primary fuse and upstream of USB PD controller. Use Value: Low 1.0 μA leakage at 22 V ensures minimal standby current drain; 35.5 V VC prevents damage to 24 V-rated PD interface ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22A | Same DO-214AC (SMA) package; lower PPPM (400 W); VBR 24.4–27.0 V; RθJA = 110 °C/W | Limited to lower-energy transients; unsuitable for automotive load dump or telecom lightning standards | Select when cost sensitivity outweighs surge energy requirement and board space allows larger thermal pad for SMA |
| SMCJ22A | Same DO-214AB (SMC) package; identical PPPM (3000 W); VBR 24.4–27.0 V; AEC-Q101 qualified; RθJA = 77.5 °C/W | Functionally identical clamping behavior and thermal performance; differs only in marking code and packaging suffix | Valid alternative if 3KASMC22AHE3_A/H lead time is constrained; verify reel code compatibility (HM3_A/H vs. standard HM3) |
Compared with SMAJ22A and SMCJ22A, the 3KASMC22AHE3_A/H offers identical high-energy clamping and automotive qualification as SMCJ22A but with Vishay's optimized passivation for enhanced long-term leakage stability, while outperforming SMAJ22A in both surge capacity and thermal management.
Availability
3KASMC22AHE3_A/H is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLCs, telecom power systems, and consumer docking stations requiring stable component supply and AEC-Q101 compliance.
Supply support for 3KASMC22AHE3_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 reliability, high-temperature operation, and automotive qualification.
The 3KASMC series belongs to Vishay's PAR® (Protective Anisotropic Rectifier) family, engineered specifically for high-energy transient suppression in harsh environments where AEC-Q101 compliance and +185 °C operation are mandatory.
FAQ
What is the clamping voltage of the 3KASMC22AHE3_A/H under full-rated surge conditions?
The 3KASMC22AHE3_A/H has a maximum clamping voltage (VC) of 35.5 V at its rated peak pulse current (IPPM) of 84.5 A, measured with a 10/1000 μs waveform. This value is guaranteed per the Vishay datasheet (Doc. #89962, Rev. 05-Mar-13) and reflects actual device behavior during standardized surge testing - critical for verifying safe operating margins of downstream components like DC-DC controllers or microcontrollers.
Is the 3KASMC22AHE3_A/H suitable for automotive applications?
Yes, the 3KASMC22AHE3_A/H is AEC-Q101 qualified and rated for junction temperatures up to +185 °C, making it suitable for under-hood and chassis-mounted automotive systems including body control modules, ADAS power supplies, and infotainment system inputs. Its DO-214AB package and MSL Level 1 rating further support automated SMT assembly in automotive manufacturing lines.
What does the "_A/H" suffix mean in 3KASMC22AHE3_A/H?
The "_A/H" suffix in 3KASMC22AHE3_A/H indicates a specific packaging configuration: "H" denotes 7-inch plastic tape-and-reel delivery mode with 850 units per reel, and "A" refers to the base P/NHM3 revision level (per Vishay ordering table). The "E3" denotes matte tin plating per J-STD-002, confirming solderability and RoHS compliance.
How does the thermal resistance of the 3KASMC22AHE3_A/H affect PCB layout?
The 3KASMC22AHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 77.5 °C/W when mounted on the minimum recommended pad layout. To maintain safe junction temperature under sustained power dissipation, designers must provide adequate copper area (≥0.126" × 0.185" per Vishay outline) and avoid excessive trace length - especially for the cathode connection, which carries surge current.
Does the 3KASMC22AHE3_A/H have bidirectional polarity?
No, the 3KASMC22AHE3_A/H is unidirectional only, as confirmed in the Vishay datasheet (Document #89962, Section "FEATURES"). It functions as a reverse-biased avalanche diode for transient suppression on positive rails and requires correct orientation (cathode toward protected line) - unlike bidirectional TVS devices that protect both polarities simultaneously.
3KASMC22AHE3_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)
3KASMC22AHE3_A/H FAQ
1.How can I place an order for 3KASMC22AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC22AHE3_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 3KASMC22AHE3_A/H reliable?
The price and inventory of 3KASMC22AHE3_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 3KASMC22AHE3_A/H is usually 5 days.
3.What payment methods are accepted for 3KASMC22AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC22AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC22AHE3_A/H?
3KASMC22AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC22AHE3_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 3KASMC22AHE3_A/H?
For technical support, including 3KASMC22AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC22AHE3_A/H requirements.
6.How does Aetrix verify that 3KASMC22AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All 3KASMC22AHE3_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 3KASMC22AHE3_A/H meets industry standards.
7.What is the process for return or replacement of 3KASMC22AHE3_A/H?
All 3KASMC22AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC22AHE3_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 3KASMC22AHE3_A/H part is unused and in its original packaging.
Return procedure for 3KASMC22AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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