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Vishay General Semiconductor - Diodes Division 3KASMC20AHE3_A/I
- Part No.:
- 3KASMC20AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC20AHE3_A/I.pdf
- Description:
- TVS DIODE 20VWM 32.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,555
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Product details
Overview
3KASMC20AHE3_A/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in DO-214AB (SMC) package, designed for high-energy surge clamping with 3000 W peak pulse power (10/1000 µs), 22.2–24.5 V breakdown voltage (VBR), and 32.4 V maximum clamping voltage (VC) at 92.6 A peak current - deployed in automotive powertrain control units to protect MOSFET gate drivers from load-dump transients.
For engineers reviewing the 3KASMC20AHE3_A/I datasheet, 3KASMC20AHE3_A/I pinout, 3KASMC20AHE3_A/I application, or 3KASMC20AHE3_A/I equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 77.5 °C/W), junction temperature rating (TJ = –65 to +185 °C), and SMC package mechanical data per JEDEC DO-214AB outline.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology optimized for high-temperature stability and low incremental surge resistance. Its unidirectional polarity and 1.0 mA test current ensure precise VBR specification at 22.2–24.5 V, with clamping performance validated under 10/1000 µs waveform per ANSI/IEEE C62.35.
Rated for 200 A non-repetitive forward surge current (8.3 ms half-sine), it sustains 6.0 W steady-state power dissipation on infinite heatsink at TL = 75 °C and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak tolerance - confirming suitability for automated SMT assembly in harsh-environment automotive modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 22.2 V / 24.5 V at IT = 1.0 mA - defines precise reverse breakdown threshold for reliable overvoltage triggering |
| VWM | 20 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 32.4 V at 92.6 A - clamping voltage during 3000 W transient ensures downstream ICs stay below absolute max ratings |
| PPPM | 3000 W (10/1000 µs) - enables protection against ISO 7637-2 Pulse 5a load-dump surges in 12 V systems |
| TJ max. | +185 °C - supports operation in engine bay environments without derating loss |
| RθJA | 77.5 °C/W - informs thermal design margin when mounted on minimum recommended pad layout |
| AEC-Q101 | Qualified - validates reliability for automotive electronic control units per stress-test requirements |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, matte tin-plated leads, cathode indicated by color band. Meets UL 94 V-0 flammability rating and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or low-side return path; conducts surge current to reference plane during clamping |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., MOSFET gate or sensor supply); initiates avalanche breakdown above VWM |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier process ensures stable VBR and low leakage across –65 to +185 °C |
| Peak pulse power | 3000 W (10/1000 µs) enables single-device protection against severe automotive load-dump events |
| Clamping ratio (VC/VBR) | 1.31 - low ratio minimizes voltage overshoot during fast transients, preserving signal integrity |
| Response time | < 1.0 ps - intrinsic diode speed ensures clamping activation before sensitive circuitry experiences overstress |
| MSL Level 1 | Reflow-compatible up to 260 °C peak without moisture-induced failure - eliminates bake requirement pre-assembly |
Applications
| Automotive Powertrain Control | Industrial Motor Drive Protection |
|---|---|
|
Use Scenario: Protecting IGBT gate driver inputs in 48 V mild-hybrid starter-generator inverters from inductive switching spikes and battery reverse-polarity faults. IC Role / Device Role / Timing Role: Unidirectional TVS placed between gate resistor and driver IC output to clamp transients below 32.4 V within sub-nanosecond response window. Use Value: Prevents gate oxide rupture in SiC drivers while maintaining <1.0 µA leakage at 20 V nominal bus voltage. |
Use Scenario: Safeguarding RS-485 transceiver power rails in programmable logic controller (PLC) backplanes exposed to field-wiring ESD and inductive kickback. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing 3000 W surges on 24 V auxiliary supply lines upstream of LDO regulators. Use Value: Enables compliance with IEC 61000-4-5 Level 4 (4 kV) surge immunity without additional series impedance or filtering. |
| Automotive Body Electronics | Telecom Power Interface |
|
Use Scenario: Clamping transients on LIN bus termination resistors in door module ECUs subjected to cable harness hot-plug events and ESD. IC Role / Device Role / Timing Role: Low-capacitance TVS (CJ ≈ 100 pF at 0 V) placed directly across LIN line-to-ground to suppress >1 kV transients without distorting 19.2 kbps signaling. Use Value: Maintains signal fidelity while meeting ISO 10605 30 kV air discharge requirements due to fast response and low VC. |
Use Scenario: Protecting PoE-powered Ethernet switch ports from lightning-induced surges entering via outdoor cabling. IC Role / Device Role / Timing Role: Primary-level TVS on 48 V PSE output rail, coordinated with secondary-side MOVs to distribute energy across stages. Use Value: Withstands 200 A IFSM 8.3 ms surge and 3000 W PPPM, enabling robust front-end protection without sacrificial fusing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ20A-E3/57T (Vishay) | Lower PPPM (400 W), SMA package (smaller footprint), VC = 32.4 V at 12.3 A | Targeted for space-constrained consumer electronics; insufficient for automotive load-dump duty cycle | Select only for cost-sensitive, low-energy applications where 3000 W capability is unnecessary |
| 1.5KE20A (ON Semiconductor) | Through-hole DO-201 package, same VBR/VC, but lower thermal resistance (RθJA = 6.5 °C/W) and no AEC-Q101 qualification | Used in industrial power supplies with manual assembly; lacks automotive reliability validation | Choose for prototyping or non-automotive production where board-level rework is acceptable and qualification is not mandated |
Compared with SMAJ20A-E3/57T and 1.5KE20A, the 3KASMC20AHE3_A/I uniquely combines AEC-Q101 qualification, 3000 W surge capacity in SMC package, and +185 °C junction rating - making it the only option qualified for under-hood automotive deployment requiring zero derating at elevated ambient temperatures.
Availability
3KASMC20AHE3_A/I is available at Aetrix Electronics and suitable for automotive powertrain control, industrial motor drive protection, and telecom power interface applications requiring stable component supply, long-term lifecycle support, and traceable AEC-Q101-compliant sourcing.
Supply support for 3KASMC20AHE3_A/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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with emphasis on high-reliability, high-temperature, and automotive-grade performance.
The 3KASMCxxA family was engineered specifically for AEC-Q101-compliant transient suppression in automotive power systems, delivering 3000 W surge handling in compact SMC packages with extended junction temperature capability.
FAQ
What is the clamping voltage of the 3KASMC20AHE3_A/I at its rated peak pulse current?
The 3KASMC20AHE3_A/I exhibits a maximum clamping voltage (VC) of 32.4 V when subjected to its rated peak pulse current of 92.6 A under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures protected circuits remain within safe operating limits during high-energy transients. The 3KASMC20AHE3_A/I's low clamping ratio (VC/VBR ≈ 1.31) reflects its optimized junction design for minimal voltage overshoot.
Is the 3KASMC20AHE3_A/I qualified for automotive applications?
Yes, the 3KASMC20AHE3_A/I is AEC-Q101 qualified, having passed all stress tests required for automotive-grade discrete semiconductors, including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing. Its +185 °C maximum junction temperature and DO-214AB package construction meet stringent under-hood reliability requirements. The 3KASMC20AHE3_A/I is explicitly listed in Vishay's AEC-Q101 qualified products documentation.
What is the standoff voltage rating for the 3KASMC20AHE3_A/I?
The 3KASMC20AHE3_A/I has a maximum reverse stand-off voltage (VWM) of 20 V, meaning it remains in high-impedance state with ≤1.0 µA leakage current up to this DC or RMS voltage level. This rating allows integration into 12 V and 24 V automotive and industrial systems without false triggering. The 3KASMC20AHE3_A/I's VWM is precisely aligned with common supply rails to maximize margin before avalanche onset.
Does the 3KASMC20AHE3_A/I have a unidirectional or bidirectional configuration?
The 3KASMC20AHE3_A/I is a unidirectional TVS diode, intended for protection of DC circuits where polarity is fixed - such as power supply rails and gate drive lines. Its cathode is marked by a color band, and it conducts surge current only from cathode to anode during reverse overvoltage events. The 3KASMC20AHE3_A/I is not suitable for AC line protection or bidirectional signal lines without external polarity management.
What package type does the 3KASMC20AHE3_A/I use, and what are its key mechanical features?
The 3KASMC20AHE3_A/I uses the DO-214AB (SMC) surface-mount package, with overall dimensions of 7.11 mm × 6.22 mm × 2.62 mm and a cathode band for polarity identification. It features matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards, UL 94 V-0 molding compound, and MSL Level 1 rating for lead-free reflow up to 260 °C. The 3KASMC20AHE3_A/I's SMC footprint balances high-power handling with automated assembly compatibility.
3KASMC20AHE3_A/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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 20V
- Voltage - Breakdown (Min):
- 22.2V
- Voltage - Clamping (Max) @ Ipp:
- 32.4V
- Current - Peak Pulse (10/1000µs):
- 92.6A
- 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)
3KASMC20AHE3_A/I FAQ
1.How can I place an order for 3KASMC20AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC20AHE3_A/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 3KASMC20AHE3_A/I reliable?
The price and inventory of 3KASMC20AHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3KASMC20AHE3_A/I is usually 5 days.
3.What payment methods are accepted for 3KASMC20AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC20AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC20AHE3_A/I?
3KASMC20AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC20AHE3_A/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 3KASMC20AHE3_A/I?
For technical support, including 3KASMC20AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC20AHE3_A/I requirements.
6.How does Aetrix verify that 3KASMC20AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All 3KASMC20AHE3_A/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 3KASMC20AHE3_A/I meets industry standards.
7.What is the process for return or replacement of 3KASMC20AHE3_A/I?
All 3KASMC20AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC20AHE3_A/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 3KASMC20AHE3_A/I part is unused and in its original packaging.
Return procedure for 3KASMC20AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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