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Vishay General Semiconductor - Diodes Division 3KASMC20HE3_A/I
- Part No.:
- 3KASMC20HE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC20HE3_A/I.pdf
- Description:
- TVS DIODE 20VWM 35.8VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,150
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Product details
Overview
3KASMC20HE3_A/I 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), 20 V stand-off voltage (VWM), 22.2–24.5 V breakdown voltage (VBR), and 185 °C maximum junction temperature - deployed for automotive-grade overvoltage protection on power rails and signal lines feeding MOSFETs or sensor ICs.
For engineers reviewing the 3KASMC20HE3_A/I datasheet, 3KASMC20HE3_A/I pinout, 3KASMC20HE3_A/I application, or 3KASMC20HE3_A/I equivalent, key selection criteria include clamping voltage (32.4 V at IPPM), AEC-Q101 qualification, MSL Level 1 rating, uni-directional polarity, and thermal resistance (RθJA = 77.5 °C/W).
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to achieve stable clamping under high-temperature stress (TJ up to 185 °C), with low incremental surge resistance and fast response time critical for suppressing transients from inductive load switching. Its unidirectional configuration enables integration into DC-biased circuits without reverse conduction risk.
Designed for automotive and industrial environments, it meets J-STD-020 MSL Level 1 (260 °C peak reflow) and delivers 92.6 A peak pulse current (IPPM) at 32.4 V clamping voltage, while maintaining ≤1.0 μA reverse leakage at 20 V and 25 °C - ensuring minimal standby power loss.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC bias margin. |
| VBR (min/max) | 22.2 V / 24.5 V at 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on during surges. |
| VC @ IPPM | 32.4 V at 92.6 A - Clamping voltage under 10/1000 μs surge; limits downstream device stress. |
| PPPM | 3000 W - Peak pulse power handling capability; supports high-energy transient suppression. |
| TJ max. | +185 °C - Enables operation in under-hood automotive or high-ambient industrial locations. |
| IR @ VWM | ≤1.0 μA at 25 °C - Ultra-low leakage preserves system efficiency in battery-powered or low-power sensor interfaces. |
| AEC-Q101 | Qualified - Validated for automotive electronic systems 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 / Surge return path | Connected to ground or low-side reference; completes clamping loop during transient events. |
| Cathode | Reverse-biased terminal / Clamping node | Connected to protected line (e.g., 24 V rail or sensor output); conducts when V > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier structure enhances long-term reliability under thermal cycling and humidity. |
| High-temperature operation | Rated for continuous operation up to TJ = +185 °C - suitable for engine control units and power inverters. |
| Clamping performance | 32.4 V clamping at 92.6 A ensures MOSFET gate drivers and microcontroller I/O remain within safe SOA. |
| Reflow compatibility | MSL Level 1 rating guarantees robustness through standard lead-free reflow (260 °C peak) without popcorn or delamination. |
| Automotive qualification | AEC-Q101 compliance confirms suitability for safety-critical vehicle subsystems including ADAS and body electronics. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Suppressing load-dump and jump-start transients on 24 V battery-fed ECUs and lighting modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground to clamp surges above 20 V. Use Value: Limits voltage excursion to ≤32.4 V during 3000 W pulses, protecting downstream PMICs and CAN transceivers. |
Use Scenario: Shielding analog outputs of pressure or temperature sensors from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-leakage (≤1.0 μA) TVS connected across sensor output and ground. Use Value: Prevents latch-up or damage to precision ADC inputs while adding <0.5 pF parasitic capacitance. |
| Motor Drive Gate Driver Protection | Telecom DC Power Input Protection |
Use Scenario: Safeguarding high-side and low-side gate drivers in BLDC inverters against shoot-through-induced spikes. IC Role / Device Role / Timing Role: TVS mounted at driver supply pins to absorb inductive kickback from motor windings. Use Value: Fast response and 92.6 A IPPM capability suppresses sub-μs spikes before driver ICs exceed absolute max ratings. |
Use Scenario: Protecting PoE-powered equipment front-end DC-DC converters from lightning-induced surges on 48 V input. IC Role / Device Role / Timing Role: Primary clamping device on main DC input rail upstream of filtering stage. Use Value: 3000 W PPPM rating handles telecom-grade surge waveforms (IEC 61000-4-5) without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ20A | Same DO-214AC (SMA) package; lower PPPM (400 W); VBR = 22.2–24.5 V; RθJA ≈ 110 °C/W. | Limited to lower-energy transients; not AEC-Q101 qualified; unsuitable for under-hood automotive use. | Select only for cost-sensitive consumer or non-automotive industrial designs with <500 W surge exposure. |
| SMCJ20A | Same DO-214AB (SMC) package; identical PPPM (3000 W); VBR = 22.2–24.5 V; AEC-Q101 qualified; RθJA = 77.5 °C/W. | Functionally equivalent but lacks HM3 suffix - may not meet latest whisker testing (JESD 201 Class 2) or same revision traceability. | Acceptable where full HM3 compliance (whisker resistance, RoHS, AEC-Q101) is not mandated by OEM spec. |
Compared with SMAJ20A and SMCJ20A, the 3KASMC20HE3_A/I provides guaranteed AEC-Q101 qualification, JESD 201 Class 2 whisker resistance, and documented HM3 revision traceability - making it the preferred choice for Tier 1 automotive BOMs requiring full compliance documentation.
Availability
3KASMC20HE3_A/I is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface design, and telecom DC input protection requiring stable component supply, full AEC-Q101 traceability, and MSL Level 1 reflow compatibility.
Supply support for 3KASMC20HE3_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 is a global leader in discrete semiconductors, specializing in diodes, rectifiers, TVS devices, and optoelectronics with emphasis on reliability, high-temperature operation, and automotive qualification.
The 3KASMC series belongs to Vishay's PAR® (Protection Against Risk) transient suppressor family, engineered specifically for high-reliability automotive and industrial applications demanding extended temperature range and robust surge immunity.
FAQ
What is the clamping voltage of the 3KASMC20HE3_A/I under a 10/1000 μs surge?
The 3KASMC20HE3_A/I has a maximum clamping voltage (VC) of 32.4 V when subjected to its rated peak pulse current of 92.6 A using the standardized 10/1000 μs waveform. This value is measured per IEC 61000-4-5 and ensures protected circuitry remains within safe operating limits during transient events. The 3KASMC20HE3_A/I maintains this clamping performance across its full operating temperature range.
Is the 3KASMC20HE3_A/I qualified for automotive applications?
Yes, the 3KASMC20HE3_A/I is AEC-Q101 qualified, confirming its reliability for automotive electronic systems. It undergoes rigorous stress testing including high-temperature operating life (HTOL), temperature cycling (TCT), and unbiased highly accelerated stress testing (UHAST). The 3KASMC20HE3_A/I also meets MSL Level 1 per J-STD-020 and supports lead-free reflow up to 260 °C - all documented in Vishay's qualification report for this part number.
What does the "HM3_A/I" suffix indicate in 3KASMC20HE3_A/I?
The "HM3_A/I" suffix denotes Vishay's RoHS-compliant, AEC-Q101-qualified base P/NHM3 with revision code "A" and packaging option "I" - meaning 3500-unit 13-inch tape-and-reel delivery. The HM3 designation confirms compliance with JESD 201 Class 2 whisker testing, UL 94 V-0 flammability, and full material categorization per Vishay Doc. #99912. The 3KASMC20HE3_A/I is not a generic variant - this exact suffix defines its qualified manufacturing lot and traceability.
Can the 3KASMC20HE3_A/I replace older SMCJ20A parts in existing designs?
The 3KASMC20HE3_A/I shares the same DO-214AB (SMC) package, electrical parameters (VWM = 20 V, VBR = 22.2–24.5 V, VC = 32.4 V), and 3000 W PPPM rating as SMCJ20A, enabling direct substitution in most cases. However, the 3KASMC20HE3_A/I adds HM3-specific qualifications including JESD 201 Class 2 whisker resistance and enhanced revision control. No PCB changes are required, but validation of full AEC-Q101 compliance documentation is recommended for automotive releases.
What is the maximum reverse leakage current for the 3KASMC20HE3_A/I at 25 °C?
The 3KASMC20HE3_A/I exhibits a maximum reverse leakage current (IR) of 1.0 μA at its rated stand-off voltage (VWM = 20 V) and ambient temperature of 25 °C. This ultra-low leakage is maintained up to 150 °C (ID ≤ 50 μA), supporting energy-efficient designs in always-on automotive modules and battery-backed industrial sensors. The 3KASMC20HE3_A/I datasheet specifies this value under standardized test conditions per ANSI/IEEE C62.35.
3KASMC20HE3_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:
- 35.8V
- Current - Peak Pulse (10/1000µs):
- 83.8A
- 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)
3KASMC20HE3_A/I FAQ
1.How can I place an order for 3KASMC20HE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC20HE3_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 3KASMC20HE3_A/I reliable?
The price and inventory of 3KASMC20HE3_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 3KASMC20HE3_A/I is usually 5 days.
3.What payment methods are accepted for 3KASMC20HE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC20HE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC20HE3_A/I?
3KASMC20HE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC20HE3_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 3KASMC20HE3_A/I?
For technical support, including 3KASMC20HE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC20HE3_A/I requirements.
6.How does Aetrix verify that 3KASMC20HE3_A/I is sourced from the original manufacturer or authorized distributors?
All 3KASMC20HE3_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 3KASMC20HE3_A/I meets industry standards.
7.What is the process for return or replacement of 3KASMC20HE3_A/I?
All 3KASMC20HE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC20HE3_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 3KASMC20HE3_A/I part is unused and in its original packaging.
Return procedure for 3KASMC20HE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3KASMC20HE3_A/I Tags
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