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Vishay General Semiconductor - Diodes Division 3KASMC40HE3/57T
- Part No.:
- 3KASMC40HE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC40HE3/57T.pdf
- Description:
- TVS DIODE 40VWM 71.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,854
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Product details
Overview
3KASMC40HE3/57T 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), 40 V stand-off voltage (VWM), and 64.5 V maximum clamping voltage (VC) at 46.5 A IPPM. It operates up to TJ = 185 °C and is AEC-Q101 qualified for automotive-grade reliability.
For engineers reviewing the 3KASMC40HE3/57T datasheet, 3KASMC40HE3/57T pinout, 3KASMC40HE3/57T application, or 3KASMC40HE3/57T equivalent, this device serves as a high-energy, fast-response overvoltage protection component for DC power rails and signal lines in harsh thermal environments - especially where MSL Level 1 reflow compatibility and low incremental surge resistance are critical.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology optimized for junction stability under repeated surge stress. Its unidirectional polarity enables integration into DC-biased circuits without reverse conduction concerns, and its 18.3 °C/W junction-to-lead thermal resistance supports robust power dissipation on standard PCB copper.
The device delivers 64.5 V clamping at 46.5 A peak pulse current (10/1000 μs), with <1 ns response time and 1.0 μA max reverse leakage at 40 V. It meets J-STD-020 MSL Level 1 (260 °C peak reflow) and is qualified per AEC-Q101 for automotive under-hood and powertrain applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC bias margin. |
| VBR (min/max) | 44.4 V / 49.1 V - Breakdown occurs within this range at 1 mA test current; ensures predictable turn-on threshold. |
| VC @ IPPM | 64.5 V - Clamped voltage at 46.5 A peak pulse; determines protected circuit's maximum transient exposure. |
| PPPM | 3000 W - Peak pulse power handling (10/1000 μs); supports high-energy transients like ISO 7637-2 Pulse 5a. |
| TJ max. | 185 °C - Enables operation in under-hood automotive environments without derating below ambient +125 °C. |
| IFSM | 200 A - Non-repetitive forward surge rating (8.3 ms half-sine); withstands inrush or fault currents in power supplies. |
| RθJL | 18.3 °C/W - Low junction-to-lead thermal resistance; allows effective heat transfer to PCB pads and traces. |
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 / cathode-referenced reference node | Connected to lower-potential side of protected line (e.g., GND or return path); establishes unidirectional clamping direction. |
| Cathode | Clamping output / surge sink node | Connected to higher-potential side (e.g., +12 V rail or signal line); conducts surge current to ground during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier process improves long-term reliability under thermal cycling and humidity stress. |
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, HTRB, and ESD testing - no additional qualification required for Tier 1 programs. |
| MSL Level 1 rating | Compatible with standard SMT reflow profiles up to 260 °C peak, eliminating moisture sensitivity handling requirements. |
| Low RSURGE | Incremental surge resistance minimized to reduce clamping overshoot and improve energy absorption efficiency. |
| High TJ capability | 185 °C max junction temperature enables placement near hot components (e.g., power MOSFETs, DC-DC inductors) without thermal derating. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump (ISO 7637-2 Pulse 5a) and alternator switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp surges above 40 V. Use Value: Limits rail voltage to ≤64.5 V during 3000 W transients, preventing damage to downstream regulators and microcontrollers in AEC-Q100 Grade 2 systems. |
Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) connected to ADC inputs in factory automation PLCs. IC Role / Device Role / Timing Role: Low-capacitance TVS on differential or single-ended signal lines to suppress ESD and inductive coupling. Use Value: Sub-1 ns response and 1.0 μA leakage at 40 V preserve signal integrity while meeting IEC 61000-4-2 Level 4 (15 kV air) immunity requirements. |
| Telecom DC Power Input Protection | Consumer Power Adapter Output Protection |
Use Scenario: Front-end protection for PoE-powered equipment (e.g., IP cameras, wireless access points) receiving 48 V DC input. IC Role / Device Role / Timing Role: Standoff-rated TVS on primary-side DC bus to absorb lightning-induced surges and AC-coupled transients. Use Value: 3000 W peak power rating handles combined Mode 1 + Mode 2 surges per IEC 61000-4-5 (1.2/50 μs + 8/20 μs combo wave), ensuring system-level compliance. |
Use Scenario: Secondary-side overvoltage suppression in USB-C PD adapters and multi-output wall adapters. IC Role / Device Role / Timing Role: Unidirectional clamping device on regulated 5–20 V output rails to prevent fault propagation to connected devices. Use Value: 6.0 W steady-state power dissipation and 185 °C TJ rating support compact, sealed enclosures with limited airflow and high ambient temperatures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ40A | Same DO-214AC (SMA) package; lower PPPM (400 W), higher VC (64.8 V at 32.4 A), lower TJ max (150 °C). | Not suitable for automotive under-hood or high-energy surge environments; limited to consumer/industrial low-risk rails. | Select only when board space constraints require SMA footprint and surge energy is ≤400 W. |
| SMCJ40A | Same DO-214AB (SMC) package; identical PPPM (3000 W), slightly higher VC (64.8 V at 46.5 A), same TJ max (185 °C), but non-AEC-Q101. | Lacks automotive qualification; requires customer-level reliability validation for automotive programs. | Preferable for industrial or telecom designs where AEC-Q101 is not mandated and cost is prioritized. |
Compared with SMAJ40A and SMCJ40A, the 3KASMC40HE3/57T uniquely combines AEC-Q101 qualification, 3000 W surge capability, and 185 °C operation in a single validated automotive-grade part - eliminating dual sourcing and qualification overhead for Tier 1 suppliers.
Availability
3KASMC40HE3/57T is available at Aetrix Electronics and suitable for automotive power distribution modules, industrial sensor interface boards, and telecom DC input stages requiring stable component supply across extended temperature ranges and high-reliability production cycles.
Supply support for 3KASMC40HE3/57T 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 high-reliability, high-temperature, and automotive-qualified solutions.
The 3KASMC series was engineered specifically for AEC-Q101-compliant transient suppression in demanding automotive and industrial power systems - delivering enhanced thermal stability and surge robustness beyond legacy SMC-packaged TVS diodes.
FAQ
What is the clamping voltage of the 3KASMC40HE3/57T at its rated peak pulse current?
The 3KASMC40HE3/57T has a maximum clamping voltage (VC) of 64.5 V at 46.5 A peak pulse current (IPPM), measured using the standard 10/1000 μs waveform. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuits during surge events. The 3KASMC40HE3/57T maintains this clamping performance with minimal variation due to its stable passivated junction design.
Is the 3KASMC40HE3/57T suitable for automotive applications?
Yes, the 3KASMC40HE3/57T is AEC-Q101 qualified and rated for operation up to TJ = 185 °C, making it suitable for under-hood and powertrain applications including engine control units, body control modules, and ADAS power supplies. Its MSL Level 1 rating and robust surge performance meet ISO 7637-2 and ISO 16750-2 requirements. The 3KASMC40HE3/57T is explicitly listed in Vishay's AEC-Q101 qualified product matrix.
What is the package type and mounting configuration of the 3KASMC40HE3/57T?
The 3KASMC40HE3/57T uses the DO-214AB (SMC) surface-mount package with matte tin-plated leads, compliant with J-STD-002 solderability standards. It features a cathode band marking and is supplied in 7-inch plastic tape and reel (57T code, 850 units per reel). The 3KASMC40HE3/57T requires the recommended pad layout per Vishay document 89962 for optimal thermal and mechanical reliability.
How does the 3KASMC40HE3/57T compare to standard SMAJ-series TVS diodes?
The 3KASMC40HE3/57T offers 7.5× higher peak pulse power (3000 W vs. 400 W for SMAJ40A), superior thermal capability (185 °C vs. 150 °C), and AEC-Q101 qualification - whereas SMAJ40A uses the smaller DO-214AC (SMA) package and targets general-purpose protection. The 3KASMC40HE3/57T is not a drop-in replacement for SMAJ40A due to package and performance differences; board redesign is required for migration.
What is the maximum reverse leakage current of the 3KASMC40HE3/57T at its stand-off voltage?
The 3KASMC40HE3/57T specifies a maximum reverse leakage current (IR) of 1.0 μA at VWM = 40 V and TA = 25 °C. At elevated temperature (TJ = 150 °C), leakage remains ≤20 μA - confirming stable blocking behavior across automotive operating conditions. This low leakage preserves efficiency in always-on power domains and avoids false triggering in high-impedance sensor interfaces. The 3KASMC40HE3/57T achieves this via optimized junction passivation.
3KASMC40HE3/57T 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):
- 40V
- Voltage - Breakdown (Min):
- 44.4V
- Voltage - Clamping (Max) @ Ipp:
- 71.4V
- Current - Peak Pulse (10/1000µs):
- 42A
- 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)
3KASMC40HE3/57T FAQ
1.How can I place an order for 3KASMC40HE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC40HE3/57T 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 3KASMC40HE3/57T reliable?
The price and inventory of 3KASMC40HE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3KASMC40HE3/57T is usually 5 days.
3.What payment methods are accepted for 3KASMC40HE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC40HE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC40HE3/57T?
3KASMC40HE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC40HE3/57T 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 3KASMC40HE3/57T?
For technical support, including 3KASMC40HE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC40HE3/57T requirements.
6.How does Aetrix verify that 3KASMC40HE3/57T is sourced from the original manufacturer or authorized distributors?
All 3KASMC40HE3/57T 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 3KASMC40HE3/57T meets industry standards.
7.What is the process for return or replacement of 3KASMC40HE3/57T?
All 3KASMC40HE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC40HE3/57T, 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 3KASMC40HE3/57T part is unused and in its original packaging.
Return procedure for 3KASMC40HE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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