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Vishay General Semiconductor - Diodes Division 3KASMC40HE3_A/I
- Part No.:
- 3KASMC40HE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC40HE3_A/I.pdf
- Description:
- TVS DIODE 40VWM 71.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,917
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Product details
Overview
3KASMC40HE3_A/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, rated for 40 V stand-off voltage, 44.4–49.1 V breakdown at 1 mA, 3000 W peak pulse power (10/1000 μs), 185 °C maximum junction temperature, and AEC-Q101 qualified for automotive power line protection.
For engineers reviewing the 3KASMC40HE3_A/I datasheet, 3KASMC40HE3_A/I pinout, 3KASMC40HE3_A/I application, or 3KASMC40HE3_A/I equivalent, this device serves as a high-reliability clamping component for inductive load switching transients on 12 V/24 V automotive power rails, sensor supply lines, and MOSFET gate drivers where thermal stability up to 185 °C and low clamping voltage (64.5 V at 46.5 A) are critical.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology with optimized junction passivation, enabling stable operation under high-temperature stress and automotive-grade reliability requirements. Its unidirectional polarity and 10/1000 μs waveform response support robust suppression of inductive kickback and ESD-induced surges.
The device exhibits low incremental surge resistance and fast response time, delivering clamping voltage of 64.5 V at 46.5 A peak pulse current while maintaining <1.0 μA reverse leakage at 40 V and 25 °C. Thermal resistance is 77.5 °C/W (junction-to-ambient) and 18.3 °C/W (junction-to-leads), supporting high-power transient handling on standard PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC bias limit for protected circuit. |
| VBR (min/max) | 44.4 V / 49.1 V at 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on during overvoltage events. |
| PPPM | 3000 W (10/1000 μs) - Peak surge energy absorption capacity; sustains automotive load-dump and ISO 7637-2 pulse 5a without failure. |
| VC @ IPPM | 64.5 V at 46.5 A - Clamped voltage during full-rated surge; determines maximum stress imposed on downstream ICs or MOSFETs. |
| TJ max. | 185 °C - Enables use in under-hood automotive environments and high-ambient industrial applications without derating. |
| AEC-Q101 | Qualified - Meets stress test requirements for automotive discrete semiconductors including HTGB, HTRB, and TCT. |
| Package | DO-214AB (SMC) - Standardized surface-mount outline with 7.75 mm × 6.22 mm footprint and matte tin-plated leads per J-STD-002. |
Pinout & Package
DO-214AB (SMC) package: cathode-indicating band on one end; two-terminal axial configuration with no internal logic or control pins. Designed for bidirectional board-level mounting with minimum pad layout per Vishay spec.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-voltage rail; forms clamping path when cathode voltage exceeds VWM. |
| Cathode | High-side transient input terminal | Connected to protected line (e.g., battery rail); color band identifies this terminal for correct PCB orientation. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier process ensures stable leakage and breakdown behavior across 185 °C lifetime operation. |
| Clamping performance | 64.5 V clamping at 46.5 A enables reliable protection of 48 V tolerant components in 24 V systems. |
| Thermal robustness | RθJA = 77.5 °C/W allows >5 W steady-state dissipation on standard FR-4 with minimal heatsinking. |
| Automotive qualification | AEC-Q101 compliance confirms suitability for engine control units, body electronics, and ADAS power domains. |
| MSL Level 1 | Rated for reflow up to 260 °C peak, eliminating moisture sensitivity concerns during SMT assembly. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Suppressing load-dump transients (ISO 7637-2 Pulse 5a) on 24 V battery-fed ECUs and lighting modules. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery rail and local regulator input. Use Value: Limits voltage excursion to ≤64.5 V during 3000 W surge, preventing damage to 40 V-rated LDOs and microcontrollers. |
Use Scenario: Protecting analog sensor supply lines (e.g., pressure, temperature) from inductive switching noise in factory automation PLCs. IC Role / Device Role / Timing Role: Standoff-clamp TVS connected between sensor VDD and GND, upstream of filtering. Use Value: Maintains <1.0 μA leakage at 40 V, avoiding signal offset errors while clamping 10/1000 μs spikes to safe levels. |
| MOSFET Gate Driver Protection | Telecom DC Power Input Stage |
Use Scenario: Shielding high-side N-channel MOSFET gate drivers from Miller-induced voltage overshoot during fast switching. IC Role / Device Role / Timing Role: TVS placed between gate and source terminals to clamp dv/dt-induced spikes. Use Value: Fast response time and 64.5 V clamping prevent unintended turn-on and gate oxide stress in 60 V-rated MOSFETs. |
Use Scenario: Safeguarding primary DC-DC converters in telecom base station power supplies against lightning-induced surges on -48 V inputs. IC Role / Device Role / Timing Role: Unidirectional TVS installed at input connector, referenced to system ground. Use Value: 3000 W rating handles IEC 61000-4-5 Combination Wave (10/700 μs) with margin; 185 °C rating supports sealed enclosure operation. |
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 | Same DO-214AC (SMA) package; lower PPPM (400 W); VC = 64.5 V at 6.4 A; RθJA = 110 °C/W. | Not suitable for automotive load-dump; limited to low-energy ESD and signal-line protection. | Select only for cost-sensitive consumer applications where 3000 W surge immunity is unnecessary. |
| SMCJ40A | Same DO-214AB (SMC) package; identical VWM/VBR/VC; same 3000 W rating; but rated only to 175 °C and not AEC-Q101 qualified. | Lacks automotive qualification and extended temperature margin; acceptable for industrial controls but not under-hood use. | Choose when AEC-Q101 is not required and 175 °C junction limit suffices for ambient conditions. |
Compared with SMAJ40A and SMCJ40A, the 3KASMC40HE3_A/I delivers superior thermal endurance (185 °C vs. 175 °C or 150 °C), automotive qualification, and verified 3000 W surge capability in the same SMC footprint-making it the only option qualified for safety-critical automotive power rail protection.
Availability
3KASMC40HE3_A/I is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom power input stages requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for 3KASMC40HE3_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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for automotive, industrial, and computing markets.
The 3KASMC series is designed specifically for high-temperature, high-surge automotive power line protection, leveraging passivated junction technology to meet AEC-Q101 and ISO 16750 requirements.
FAQ
What is the clamping voltage of the 3KASMC40HE3_A/I at its rated peak pulse current?
The 3KASMC40HE3_A/I has a maximum clamping voltage (VC) of 64.5 V at 46.5 A peak pulse current (IPPM) under 10/1000 μs waveform conditions. This value is measured per ANSI/IEEE C62.35 and confirmed in the Vishay datasheet revision 05-Mar-13, ensuring predictable overvoltage limiting for protected downstream components in the 3KASMC40HE3_A/I design.
Is the 3KASMC40HE3_A/I suitable for automotive applications?
Yes, the 3KASMC40HE3_A/I is AEC-Q101 qualified and rated for 185 °C maximum junction temperature, making it suitable for under-hood automotive applications including engine control units, body control modules, and ADAS power domains. Its DO-214AB package meets MSL Level 1 and its 3000 W surge rating aligns with ISO 7637-2 Pulse 5a requirements-key criteria verified for the 3KASMC40HE3_A/I.
What does the "_A/I" suffix mean in 3KASMC40HE3_A/I?
The "_A/I" suffix in 3KASMC40HE3_A/I indicates the packaging configuration: "I" denotes 13-inch diameter plastic tape and reel with 3500 units per reel, per Vishay's ordering information table. The "A" denotes the base P/NHM3 variant, confirming RoHS compliance and AEC-Q101 qualification for the 3KASMC40HE3_A/I.
How does the 3KASMC40HE3_A/I compare to standard SMCJ devices?
The 3KASMC40HE3_A/I shares the DO-214AB (SMC) package and electrical ratings (VWM, VBR, VC, PPPM) with SMCJ40A but extends junction temperature to 185 °C and adds AEC-Q101 qualification. These enhancements make the 3KASMC40HE3_A/I appropriate for mission-critical automotive use where the SMCJ40A is limited to industrial environments-verified in Vishay document 89962.
What is the reverse leakage current specification for the 3KASMC40HE3_A/I at 40 V and 25 °C?
The 3KASMC40HE3_A/I specifies a maximum reverse leakage current (IR) of 1.0 μA at VWM = 40 V and TA = 25 °C, as published in the Electrical Characteristics table of Vishay document 89962. This low leakage ensures minimal power loss and signal integrity impact in always-on automotive and industrial circuits using the 3KASMC40HE3_A/I.
3KASMC40HE3_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):
- 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_A/I FAQ
1.How can I place an order for 3KASMC40HE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC40HE3_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 3KASMC40HE3_A/I reliable?
The price and inventory of 3KASMC40HE3_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 3KASMC40HE3_A/I is usually 5 days.
3.What payment methods are accepted for 3KASMC40HE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC40HE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC40HE3_A/I?
3KASMC40HE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC40HE3_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 3KASMC40HE3_A/I?
For technical support, including 3KASMC40HE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC40HE3_A/I requirements.
6.How does Aetrix verify that 3KASMC40HE3_A/I is sourced from the original manufacturer or authorized distributors?
All 3KASMC40HE3_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 3KASMC40HE3_A/I meets industry standards.
7.What is the process for return or replacement of 3KASMC40HE3_A/I?
All 3KASMC40HE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC40HE3_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 3KASMC40HE3_A/I part is unused and in its original packaging.
Return procedure for 3KASMC40HE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3KASMC40HE3_A/I Tags
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