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Vishay General Semiconductor - Diodes Division 3KASMC33AHM3/57T
- Part No.:
- 3KASMC33AHM3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC33AHM3/57T.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,657
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Product details
Overview
3KASMC33AHM3/57T from Vishay General Semiconductor is a unidirectional surface-mount PAR® Transient Voltage Suppressor (TVS) in DO-214AB (SMC) package, rated for 33 V stand-off voltage, 53.3 V clamping voltage at 56.3 A peak pulse current, 3000 W peak pulse power (10/1000 μs), and 185 °C maximum junction temperature - deployed for automotive-grade ESD and surge protection on power rails and signal lines.
For engineers reviewing the 3KASMC33AHM3/57T datasheet, 3KASMC33AHM3/57T pinout, 3KASMC33AHM3/57T application, or 3KASMC33AHM3/57T equivalent, key selection criteria include unidirectional clamping behavior, AEC-Q101 qualification, MSL Level 1 reflow compatibility, low incremental surge resistance, and thermal robustness up to TJ = 185 °C in high-reliability automotive and industrial systems.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology with optimized junction passivation, enabling stable clamping performance under high-temperature stress and repetitive transient events. Its unidirectional polarity supports DC-biased rail protection without reverse conduction during normal operation.
The device delivers 53.3 V clamping voltage at 56.3 A (10/1000 μs), with 1.0 μA max reverse leakage at 33 V and 15 μA at TJ = 150 °C, ensuring minimal standby power loss. Thermal resistance is 77.5 °C/W (junction-to-ambient, typical) and 18.3 °C/W (junction-to-leads), supporting reliable power dissipation in constrained layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 33 V - Maximum continuous reverse voltage before clamping activation; defines safe operating margin for 24 V nominal systems. |
| VBR (Breakdown Voltage) | 36.7–40.6 V at 1.0 mA - Ensures consistent turn-on threshold across production lots and temperature range. |
| VC (Clamping Voltage) | 53.3 V at IPPM = 56.3 A (10/1000 μs) - Limits downstream voltage stress during transients like ISO 7637-2 Pulse 1/2a/5a. |
| PPPM (Peak Pulse Power) | 3000 W - Sustains high-energy surges common in automotive load-dump and inductive switching events. |
| TJ max. | 185 °C - Enables operation in under-hood environments and supports AEC-Q101 qualification for automotive use. |
| IFSM (Surge Current) | 200 A (8.3 ms half-sine) - Withstands repeated high-current transients without degradation. |
| Polarity | Unidirectional - Protects DC-biased lines (e.g., battery feeds, sensor supplies) while blocking reverse conduction. |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, matte tin-plated leads, RoHS-compliant, AEC-Q101 qualified, MSL Level 1 (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lower-potential node; forms cathode-anode path for transient shunting. |
| Cathode | High-side transient input terminal | Marked by color band; connects to protected line (e.g., 24 V rail); conducts surge current to ground when V > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivated anisotropic rectifier technology | Enables stable VBR and low leakage over lifetime and temperature, critical for automotive reliability. |
| AEC-Q101 qualification | Validates robustness for automotive electronics including engine control, body modules, and ADAS sensors. |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow without preconditioning or special handling. |
| 185 °C maximum junction temperature | Permits operation in high-ambient environments such as powertrain and under-hood ECUs. |
| 3000 W peak pulse power (10/1000 μs) | Meets stringent ISO 16750-2 and ISO 7637-2 surge immunity requirements for 12 V/24 V systems. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 24 V supply lines in engine control units against load dump and alternator transients per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Unidirectional TVS clamp that diverts surge energy to ground before upstream regulators or microcontrollers are overstressed. Use Value: Clamps to 53.3 V at 56.3 A, limiting voltage seen by downstream 36 V-rated components and preserving system uptime. |
Use Scenario: Safeguarding analog output lines of pressure or temperature sensors in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: Fast-response transient suppressor placed at connector entry point to absorb ESD (IEC 61000-4-2) and cable-coupled noise. Use Value: Sub-1 ns response time and 1.0 μA leakage at 33 V prevent signal distortion and maintain measurement accuracy in 4–20 mA loops. |
| Telecom DC Power Input Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Securing 48 V DC input of PoE-powered network switches against lightning-induced surges and hot-swap transients. IC Role / Device Role / Timing Role: Primary-level TVS on bulk input rail, coordinated with upstream fuses and secondary-stage filtering. Use Value: 3000 W rating handles multi-kV induced surges; DO-214AB footprint enables compact layout near board edge connectors. |
Use Scenario: Shielding MCU GPIOs and gate drivers in smart washing machine motor control boards from commutation spikes. IC Role / Device Role / Timing Role: Localized clamping device mounted adjacent to BLDC inverter stage to suppress inductive kickback. Use Value: 200 A IFSM withstands repeated motor startup surges; 185 °C TJ rating accommodates sealed enclosure thermal buildup. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33A | Lower PPPM (400 W), higher VC (53.3 V same but at only 7.5 A), smaller SMA package (DO-214AC), TJ max = 150 °C | Not AEC-Q101 qualified; suitable for commercial-grade consumer or industrial equipment with lower surge severity. | Select SMAJ33A only if cost sensitivity outweighs automotive qualification and 3000 W surge headroom. |
| SMCJ33A | Same DO-214AB package and 3000 W rating, but VBR = 36.7–40.6 V (identical), VC = 53.3 V (identical), TJ max = 175 °C, not AEC-Q101 qualified | Lacks automotive qualification; used in industrial power supplies and telecom infrastructure where AEC-Q101 is not mandated. | Choose SMCJ33A for non-automotive applications requiring identical electrical specs but without AEC-Q101 traceability. |
Compared with SMAJ33A and SMCJ33A, the 3KASMC33AHM3/57T provides verified AEC-Q101 qualification, 185 °C junction rating, and MSL Level 1 reflow support - making it the only option among the three qualified for under-hood automotive deployment with full lifecycle traceability.
Availability
3KASMC33AHM3/57T is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom DC power inputs requiring stable component supply with full AEC-Q101 compliance and long-term manufacturing continuity.
Supply support for 3KASMC33AHM3/57T 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, MOSFETs, and protection devices with emphasis on reliability, thermal performance, and automotive qualification.
The 3KASMC series belongs to Vishay's PAR® family of high-power TVS diodes, engineered specifically for harsh-environment transient suppression in automotive, industrial, and telecom applications demanding AEC-Q101 compliance and 185 °C operation.
FAQ
What is the clamping voltage of the 3KASMC33AHM3/57T and under what test condition is it specified?
The 3KASMC33AHM3/57T has a maximum clamping voltage (VC) of 53.3 V, measured at a peak pulse current (IPPM) of 56.3 A using the standardized 10/1000 μs double-exponential waveform per ANSI/IEEE C62.35. This value ensures predictable voltage limiting during high-energy transients such as automotive load dump or inductive switching events.
Is the 3KASMC33AHM3/57T qualified for automotive applications?
Yes, the 3KASMC33AHM3/57T is AEC-Q101 qualified and rated for operation up to TJ = 185 °C, meeting requirements for under-hood and powertrain applications. It also complies with MSL Level 1 per J-STD-020 and is RoHS-compliant, making it suitable for automotive electronics subject to rigorous reliability and environmental standards.
What package type does the 3KASMC33AHM3/57T use and what are its key mechanical features?
The 3KASMC33AHM3/57T uses the DO-214AB (SMC) surface-mount package with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. It features UL 94 V-0 molding compound, a cathode band marking, and meets JESD 201 Class 2 whisker resistance - all confirmed in Vishay document 89962.
How does the 3KASMC33AHM3/57T differ from standard SMCJ33A TVS diodes?
The 3KASMC33AHM3/57T shares identical electrical specs (VWM = 33 V, VC = 53.3 V, PPPM = 3000 W) with SMCJ33A but adds AEC-Q101 qualification, 185 °C maximum junction temperature (vs. 175 °C), and enhanced process controls for automotive traceability - distinguishing it as the qualified variant for safety-critical vehicle systems.
What is the reverse leakage current specification for the 3KASMC33AHM3/57T at room temperature and elevated temperature?
At TA = 25 °C, the 3KASMC33AHM3/57T exhibits ≤1.0 μA maximum reverse leakage current at its 33 V stand-off voltage (VWM). At TJ = 150 °C, leakage increases to ≤15 μA - a controlled, documented rise that maintains functional integrity in high-temperature automotive environments.
3KASMC33AHM3/57T 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)
3KASMC33AHM3/57T FAQ
1.How can I place an order for 3KASMC33AHM3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC33AHM3/57T 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 3KASMC33AHM3/57T reliable?
The price and inventory of 3KASMC33AHM3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3KASMC33AHM3/57T is usually 5 days.
3.What payment methods are accepted for 3KASMC33AHM3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC33AHM3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC33AHM3/57T?
3KASMC33AHM3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC33AHM3/57T 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 3KASMC33AHM3/57T?
For technical support, including 3KASMC33AHM3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC33AHM3/57T requirements.
6.How does Aetrix verify that 3KASMC33AHM3/57T is sourced from the original manufacturer or authorized distributors?
All 3KASMC33AHM3/57T 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 3KASMC33AHM3/57T meets industry standards.
7.What is the process for return or replacement of 3KASMC33AHM3/57T?
All 3KASMC33AHM3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC33AHM3/57T, 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 3KASMC33AHM3/57T part is unused and in its original packaging.
Return procedure for 3KASMC33AHM3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3KASMC33AHM3/57T Tags
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