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Vishay General Semiconductor - Diodes Division 3KASMC40AHE3_B/H
- Part No.:
- 3KASMC40AHE3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC40AHE3_B/H.pdf
- Description:
- TVS DIODE 40VWM 64.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,668
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Product details
Overview
3KASMC40AHE3_B/H from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor in SMC (DO-214AB) package, rated for 40 V stand-off voltage, 46.5 A peak pulse current (10/1000 μs), 64.5 V clamping voltage at IPPM, 3000 W peak pulse power, and 185 °C maximum junction temperature - deployed for automotive-grade overvoltage protection of MOSFETs and sensor signal lines.
For engineers reviewing the 3KASMC40AHE3_B/H datasheet, 3KASMC40AHE3_B/H pinout, 3KASMC40AHE3_B/H application, or 3KASMC40AHE3_B/H equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 10/1000 μs waveform clamping performance, thermal resistance (RθJL = 18.3 °C/W), and RoHS-compliant matte tin plating per J-STD-002.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to deliver stable clamping under high-temperature operation up to TJ = 185 °C, with low incremental surge resistance and fast response time optimized for inductive load switching transients. Its unidirectional architecture provides forward conduction path during overvoltage events while maintaining low leakage (<1.0 μA at VWM).
The device is characterized for 10/1000 μs waveform compliance, meets MSL Level 1 per J-STD-020 (260 °C peak reflow), and supports automotive reliability requirements via AEC-Q101 qualification - confirmed by HE3 suffix and base P/NHE3 ordering code.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - maximum reverse stand-off voltage before clamping begins; defines safe operating range for protected circuitry. |
| VBR (min/typ/max) | 44.4 / 46.8 / 49.1 V at 1.0 mA - breakdown threshold ensures reliable triggering above normal operating voltage. |
| VC @ IPPM | 64.5 V - clamping voltage at 46.5 A peak pulse current; limits transient energy delivered to downstream components. |
| PPPM | 3000 W - peak pulse power handling capability with 10/1000 μs waveform; suitable for severe automotive load dump events. |
| TJ max. | +185 °C - enables operation in under-hood automotive environments without derating penalties. |
| RθJL | 18.3 °C/W - low junction-to-lead thermal resistance supports efficient heat transfer to PCB copper pads. |
| Polarity | Unidirectional - provides forward conduction path during overvoltage; requires correct cathode orientation in layout. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, matte tin-plated leads, cathode indicated by color band. Dimensions: 7.11 mm × 6.22 mm × 2.90 mm (L × W × H), compliant with UL 94 V-0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry during clamping | Connected to protected line's ground or low-side reference; must be routed with low-inductance path. |
| Cathode | Clamping voltage reference node | Marked by color band; connects to protected signal or power rail; determines polarity and conduction direction. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier process ensures stable VBR drift ≤ ±5 % over lifetime and temperature. |
| AEC-Q101 qualification | Validated for automotive applications including engine control units and ADAS sensor interfaces. |
| MSL Level 1 rating | Supports lead-free reflow up to 260 °C peak without popcorn or delamination risk. |
| Low clamping ratio (VC/VBR) | ~1.38 - tight ratio minimizes overvoltage stress on protected ICs during surge events. |
| High IFSM rating | 200 A (8.3 ms half-sine) - withstands repetitive inrush and fault currents without degradation. |
Applications
| Automotive Power Distribution | Industrial Sensor Signal Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against ISO 7637-2 pulse 1 and pulse 3a/b transients in vehicle power networks. IC Role / Device Role / Timing Role: Transient voltage suppressor placed at input stage to clamp surges before reaching DC-DC converters and microcontrollers. Use Value: Withstands 3000 W pulses and operates up to 185 °C, ensuring robustness in under-hood environments without derating. | Use Scenario: Shielding analog output lines of pressure or temperature sensors in factory automation systems exposed to relay coil flyback. IC Role / Device Role / Timing Role: Unidirectional TVS shunting inductive kickback from solenoid drivers to preserve signal integrity on 0–5 V or 4–20 mA outputs. Use Value: 64.5 V clamping voltage and <1.0 μA leakage at 40 V enable precise low-level signal fidelity with minimal offset error. |
| Telecom Line Interface Protection | Consumer Power Adapter Input Stage |
Use Scenario: Safeguarding Ethernet PHY interface power rails (e.g., PoE injectors) from lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 48 V DC supply line upstream of DC-DC regulation and isolation stages. Use Value: 3000 W peak power rating and fast response time limit transient duration to sub-microsecond, reducing stress on downstream capacitors and FETs. | Use Scenario: Input-stage surge suppression in universal-input AC/DC adapters subjected to mains-borne transients per IEC 61000-4-5. IC Role / Device Role / Timing Role: Secondary-level TVS after MOV, providing precise clamping and low capacitance to avoid EMI filter interaction. Use Value: SMC package allows compact placement near AC input bridge rectifier; RoHS-compliant HE3 suffix meets global regulatory requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ40A-E3/5AT | Lower PPPM (400 W), smaller SMA package, no AEC-Q101 qualification | Suitable for consumer-grade non-automotive designs with lower surge severity | Select when cost and board space are prioritized over automotive reliability and 3 kW surge handling. |
| SMCJ40AHE3_A/H | Same SMC package and electrical specs; differs only in tape-and-reel packaging (H vs B/H) and revision code | Drop-in replacement for production continuity where B/H suffix is unavailable | Choose for identical performance and form factor; verify reel quantity (850 pcs) matches procurement needs. |
Compared with SMAJ40A-E3/5AT and SMCJ40AHE3_A/H, the 3KASMC40AHE3_B/H delivers higher surge robustness (3000 W vs 400 W), guaranteed AEC-Q101 qualification, and tighter thermal resistance (RθJL = 18.3 °C/W), making it optimal for mission-critical automotive and industrial deployments.
Availability
3KASMC40AHE3_B/H is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor signal protection, telecom line interface protection requiring stable component supply, high-temperature reliability, and AEC-Q101 compliance.
Supply support for 3KASMC40AHE3_B/H 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 and automotive-grade solutions.
The 3KASMCxxA family is engineered specifically for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where sustained 185 °C operation and AEC-Q101 validation are mandatory.
FAQ
What is the clamping voltage of the 3KASMC40AHE3_B/H at its rated peak pulse current?
The 3KASMC40AHE3_B/H has a maximum clamping voltage (VC) of 64.5 V at its specified peak pulse current (IPPM) of 46.5 A with a 10/1000 μs waveform. This value is measured under standardized test conditions and defines the upper voltage limit imposed on protected circuitry during surge events. The 3KASMC40AHE3_B/H maintains this clamping performance across its full operating temperature range, supporting design margining for worst-case transients.
Is the 3KASMC40AHE3_B/H qualified for automotive applications?
Yes, the 3KASMC40AHE3_B/H is AEC-Q101 qualified, as confirmed by its HE3 suffix and documentation in Vishay's 88480 datasheet. It is rated for operation up to TJ = 185 °C and meets MSL Level 1 reflow requirements, making it suitable for under-hood and safety-critical automotive subsystems. The 3KASMC40AHE3_B/H is explicitly listed in Vishay's automotive ordering codes and supports compliance with ISO 7637-2 pulse testing protocols.
What does the "B/H" suffix mean in 3KASMC40AHE3_B/H?
The "B/H" suffix in 3KASMC40AHE3_B/H indicates the packaging configuration: "B" denotes the revision code (e.g., revision B of the die or process), and "H" specifies the preferred package code for 7-inch diameter plastic tape and reel, containing 850 units per reel. This ordering format aligns with Vishay's standard delivery mode for surface-mount components and ensures compatibility with automated pick-and-place equipment.
How does the thermal performance of the 3KASMC40AHE3_B/H compare to similar SMC-packaged TVS diodes?
The 3KASMC40AHE3_B/H features a typical junction-to-lead thermal resistance (RθJL) of 18.3 °C/W, which is lower than many competing SMC TVS devices (e.g., ~22–25 °C/W). This improved thermal path enables more efficient heat dissipation into PCB copper, allowing sustained operation at higher ambient temperatures or elevated power dissipation without exceeding TJ = 185 °C. The 3KASMC40AHE3_B/H achieves this via optimized internal metallization and leadframe design validated in Vishay's thermal characterization data.
Can the 3KASMC40AHE3_B/H replace older-generation TVS diodes like P6SMB40A in existing designs?
The 3KASMC40AHE3_B/H is not a direct drop-in replacement for P6SMB40A due to differences in package (SMC vs SMB) and thermal characteristics - SMC offers higher power handling but requires larger pad layout. While both share 40 V VWM and unidirectional polarity, the 3KASMC40AHE3_B/H delivers 3000 W PPPM versus 600 W for P6SMB40A and is AEC-Q101 qualified. Redesign of mounting pads and layout review is required before substituting the 3KASMC40AHE3_B/H in legacy P6SMB40A-based circuits.
3KASMC40AHE3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 40V
- Voltage - Breakdown (Min):
- 44.4V
- Voltage - Clamping (Max) @ Ipp:
- 64.5V
- Current - Peak Pulse (10/1000µs):
- 46.5A
- 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 (SMC)
3KASMC40AHE3_B/H FAQ
1.How can I place an order for 3KASMC40AHE3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC40AHE3_B/H 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 3KASMC40AHE3_B/H reliable?
The price and inventory of 3KASMC40AHE3_B/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3KASMC40AHE3_B/H is usually 5 days.
3.What payment methods are accepted for 3KASMC40AHE3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC40AHE3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC40AHE3_B/H?
3KASMC40AHE3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC40AHE3_B/H 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 3KASMC40AHE3_B/H?
For technical support, including 3KASMC40AHE3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC40AHE3_B/H requirements.
6.How does Aetrix verify that 3KASMC40AHE3_B/H is sourced from the original manufacturer or authorized distributors?
All 3KASMC40AHE3_B/H 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 3KASMC40AHE3_B/H meets industry standards.
7.What is the process for return or replacement of 3KASMC40AHE3_B/H?
All 3KASMC40AHE3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC40AHE3_B/H, 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 3KASMC40AHE3_B/H part is unused and in its original packaging.
Return procedure for 3KASMC40AHE3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3KASMC40AHE3_B/H Tags
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