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Vishay General Semiconductor - Diodes Division 3KASMC33AHE3/57T
- Part No.:
- 3KASMC33AHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC33AHE3/57T.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,587
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Product details
Overview
3KASMC33AHE3/57T from Vishay General Semiconductor is a unidirectional surface-mount PAR® Transient Voltage Suppressor (TVS) designed for high-reliability overvoltage protection in automotive and industrial power rails. It delivers 3000 W peak pulse power (10/1000 μs), clamps at 53.3 V under 56.3 A surge current, and operates up to 185 °C junction temperature - enabling robust protection of MOSFETs and ICs against inductive switching transients.
For engineers reviewing the 3KASMC33AHE3/57T datasheet, 3KASMC33AHE3/57T pinout, 3KASMC33AHE3/57T application, or 3KASMC33AHE3/57T equivalent, key selection criteria include its DO-214AB (SMC) package, 33 V stand-off voltage, AEC-Q101 qualification, 1.0 mA breakdown test current, and 1.0 μA max reverse leakage at VWM.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology optimized for high-temperature stability and low incremental surge resistance. Its unidirectional polarity and 185 °C maximum junction temperature support operation in under-hood automotive environments and industrial motor drive circuits where thermal derating is critical.
The device meets MSL Level 1 per J-STD-020 with 260 °C lead-free reflow compatibility and achieves 3000 W peak pulse power handling via a 10/1000 μs waveform. Clamping voltage is specified at 53.3 V for 56.3 A peak pulse current, ensuring predictable overvoltage limiting during transient events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working range for 33 V nominal systems. |
| VBR (min/max) | 36.7 V / 40.6 V - Breakdown occurs within this range at 1.0 mA test current; ensures reliable triggering above system operating voltage. |
| PPPM | 3000 W - Peak pulse power dissipation capability with 10/1000 μs waveform; protects against high-energy transients like load dump. |
| IPPM | 56.3 A - Peak pulse current corresponding to 3000 W clamping; determines minimum trace/solder joint robustness required. |
| VC | 53.3 V - Maximum clamping voltage at IPPM; sets upper bound on protected circuit voltage during surge. |
| TJ max. | +185 °C - Maximum junction temperature rating; enables use in high-ambient environments without thermal shutdown. |
| RθJA | 77.5 °C/W - Junction-to-ambient thermal resistance; informs heatsinking requirements when mounted on minimum pad layout. |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, cathode indicated by color band. RoHS-compliant, AEC-Q101 qualified, matte tin-plated leads solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point for unidirectional clamping path | Connected to ground or low-voltage rail; completes transient current path during overvoltage event. |
| Cathode | High-side connection point; marked by color band | Connected to protected line (e.g., 33 V supply); reverse-biased during normal operation, avalanches during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation optimized design | Enables stable 185 °C operation and long-term reliability under thermal cycling in automotive under-hood applications. |
| AEC-Q101 qualification | Validates suitability for automotive electronics per stress-test requirements including HTRB, HTGB, and temperature cycling. |
| 3000 W peak pulse power (10/1000 μs) | Provides immunity to ISO 7637-2 Pulse 5a/b (load dump) and similar high-energy transients in 24 V vehicle systems. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients, improving protection margin for downstream MOSFETs and controllers. |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without moisture sensitivity concerns or pre-bake requirements. |
Applications
| Automotive Power Rail Protection | Industrial Motor Drive DC Bus |
|---|---|
Use Scenario: Protecting 24 V battery-fed ECUs and body control modules from load dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 24 V supply and ground to clamp surges exceeding 33 V. Use Value: Withstands 3000 W pulses and operates up to 185 °C, meeting AEC-Q101 requirements for under-hood placement. |
Use Scenario: Safeguarding gate drivers and bus capacitors in variable-frequency drives subjected to inductive kickback. IC Role / Device Role / Timing Role: Parallel-connected TVS absorbing energy from IGBT/MOSFET turn-off spikes on DC link. Use Value: 53.3 V clamping voltage limits bus overvoltage below MOSFET VDSS rating while sustaining repeated 56.3 A surges. |
| Telecom Power Supply Input | Consumer Appliance Control Board |
Use Scenario: Input-stage protection for 33 V telecom rectifiers exposed to lightning-induced surges on AC lines. IC Role / Device Role / Timing Role: First-line defense suppressing common-mode transients before primary regulation stage. Use Value: 1.0 μA max reverse leakage at 33 V ensures minimal standby power loss; DO-214AB footprint supports high-density layout. |
Use Scenario: Overvoltage suppression on microcontroller power rails in washing machine main boards during pump motor commutation. IC Role / Device Role / Timing Role: Localized TVS adjacent to MCU VDD pins to prevent latch-up from ESD or inductive coupling. Use Value: Fast response time and 36.7–40.6 V breakdown window ensure activation before 33 V rail exceeds MCU absolute maximum ratings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33A | Lower peak pulse power (400 W), smaller SMA package, 33 V VWM, 53.3 V VC at 7.5 A | Not AEC-Q101 qualified; suitable for consumer-grade, non-automotive designs with lower surge energy requirements | Select SMAJ33A only when system-level surge energy is ≤400 W and automotive qualification is not required. |
| SMCJ33A | Same DO-214AB package, 3000 W rating, but higher VBR (36.7–40.6 V same), identical VC (53.3 V), AEC-Q101 qualified | Functionally interchangeable; differs only in base P/N suffix and minor process revision - verified drop-in replacement per Vishay documentation | SMCJ33A offers identical electrical performance and qualification; choose based on inventory availability or preferred distributor channel. |
Compared with SMAJ33A and SMCJ33A, the 3KASMC33AHE3/57T provides guaranteed AEC-Q101 compliance and 185 °C operation - critical for automotive under-hood deployment - while maintaining full pin-and-function compatibility with SMCJ33A in DO-214AB layout.
Availability
3KASMC33AHE3/57T is available at Aetrix Electronics and suitable for automotive ECU protection, industrial motor drive DC bus stabilization, and telecom power input surge suppression requiring stable component supply across extended temperature and lifecycle conditions.
Supply support for 3KASMC33AHE3/57T 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® family of high-power TVS diodes engineered specifically for AEC-Q101-compliant automotive and harsh-environment industrial applications demanding 185 °C junction capability and 3000 W surge immunity.
FAQ
What is the clamping voltage of the 3KASMC33AHE3/57T and how is it measured?
The 3KASMC33AHE3/57T has a maximum clamping voltage (VC) of 53.3 V, measured at a peak pulse current (IPPM) of 56.3 A using a 10/1000 μs double-exponential waveform per ANSI/IEEE C62.35. This value represents the highest voltage the device allows across its terminals during a standardized surge event, directly defining the protection level for downstream components.
Is the 3KASMC33AHE3/57T qualified for automotive applications?
Yes, the 3KASMC33AHE3/57T is AEC-Q101 qualified and rated for operation up to +185 °C junction temperature. It meets automotive reliability requirements including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and temperature cycling - making it suitable for under-hood ECUs, body control modules, and ADAS power supplies.
What package does the 3KASMC33AHE3/57T use and what are its mounting requirements?
The 3KASMC33AHE3/57T uses the DO-214AB (SMC) surface-mount package with matte tin-plated leads. It requires the minimum recommended pad layout per Vishay specification, supports MSL Level 1 handling, and is compatible with lead-free reflow up to 260 °C peak temperature per J-STD-020.
How does the 3KASMC33AHE3/57T differ from standard SMAJ or SMCJ series TVS diodes?
The 3KASMC33AHE3/57T shares the DO-214AB package and 3000 W rating with SMCJ33A but features enhanced junction passivation for 185 °C operation and tighter process control validated under AEC-Q101. Unlike SMAJ33A (SMA package, 400 W), it is not a direct substitute due to power and qualification differences.
What is the reverse leakage current specification for the 3KASMC33AHE3/57T at its stand-off voltage?
The 3KASMC33AHE3/57T specifies a maximum reverse leakage current (IR) of 1.0 μA at its 33 V stand-off voltage (VWM) and 25 °C ambient temperature. At elevated temperature (TJ = 150 °C), leakage remains ≤50 μA - ensuring minimal power loss in always-on automotive systems.
3KASMC33AHE3/57T 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):
- 33V
- Voltage - Breakdown (Min):
- 36.7V
- Voltage - Clamping (Max) @ Ipp:
- 53.3V
- Current - Peak Pulse (10/1000µs):
- 56.3A
- 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)
3KASMC33AHE3/57T FAQ
1.How can I place an order for 3KASMC33AHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC33AHE3/57T 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 3KASMC33AHE3/57T reliable?
The price and inventory of 3KASMC33AHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3KASMC33AHE3/57T is usually 5 days.
3.What payment methods are accepted for 3KASMC33AHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC33AHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC33AHE3/57T?
3KASMC33AHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC33AHE3/57T 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 3KASMC33AHE3/57T?
For technical support, including 3KASMC33AHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC33AHE3/57T requirements.
6.How does Aetrix verify that 3KASMC33AHE3/57T is sourced from the original manufacturer or authorized distributors?
All 3KASMC33AHE3/57T 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 3KASMC33AHE3/57T meets industry standards.
7.What is the process for return or replacement of 3KASMC33AHE3/57T?
All 3KASMC33AHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC33AHE3/57T, 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 3KASMC33AHE3/57T part is unused and in its original packaging.
Return procedure for 3KASMC33AHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3KASMC33AHE3/57T Tags
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