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Vishay General Semiconductor - Diodes Division 3KASMC43AHE3_B/H
- Part No.:
- 3KASMC43AHE3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC43AHE3_B/H.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,185
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Product details
Overview
3KASMC43AHE3_B/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, rated for 43 V stand-off voltage, 52.8 V breakdown at 1 mA, 3000 W peak pulse power (10/1000 μs), and 185 °C maximum junction temperature - deployed for automotive-grade overvoltage protection of sensor signal lines and MOSFET gates.
For engineers reviewing the 3KASMC43AHE3_B/H datasheet, 3KASMC43AHE3_B/H pinout, 3KASMC43AHE3_B/H application, or 3KASMC43AHE3_B/H equivalent, key selection criteria include clamping voltage (69.4 V at 43.2 A), unidirectional polarity, AEC-Q101 qualification, RoHS compliance, and thermal resistance (RθJA = 77.5 °C/W) under standard PCB mounting.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology to deliver stable clamping performance across -65 °C to +185 °C operating range. Its 10/1000 μs waveform response supports high-energy transients from inductive load switching while maintaining low incremental surge resistance and fast response time.
The device operates exclusively in unidirectional mode with cathode band marking, meets MSL Level 1 per J-STD-020, and is qualified to AEC-Q101 for automotive use. Its SMC (DO-214AB) package features matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - Maximum reverse working voltage before clamping begins; defines safe operating margin for 43 V rail protection. |
| VBR (min/typ/max) | 47.8 / 50.3 / 52.8 V at 1 mA - Breakdown threshold ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 69.4 V at 43.2 A - Clamping voltage limits downstream IC stress during 3000 W transient surges. |
| PPPM | 3000 W (10/1000 μs) - Peak pulse power rating determines survivability against ISO 7637-2 or similar automotive transients. |
| TJ max. | +185 °C - Enables operation in under-hood automotive environments without derating penalties up to rated power. |
| RθJA | 77.5 °C/W - Thermal resistance under standard pad layout informs board-level thermal design for sustained power dissipation. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, molded case meeting UL 94 V-0, with cathode indicated by color band. Terminals are matte tin-plated, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to protected circuit ground or low-side reference. | Provides return path for clamped surge current; must be routed with low-inductance trace to minimize voltage overshoot. |
| Cathode | Current exit point in forward bias; connected to protected line (e.g., sensor output or MOSFET gate). | Defines polarity-sensitive connection - reverse connection disables clamping function and risks device failure. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation optimized design | Enables stable leakage performance (<1 μA at VWM) and long-term reliability under thermal cycling and humidity exposure. |
| AEC-Q101 qualification | Validates robustness for automotive applications including engine control units, ADAS sensors, and body electronics modules. |
| 3000 W peak pulse power (10/1000 μs) | Withstands high-energy transients from load dump or relay coil de-energization without degradation. |
| MSL Level 1, 260 °C reflow compatible | Supports standard lead-free SMT assembly without preconditioning or special handling requirements. |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients, improving protection margin for sensitive ICs. |
Applications
| Automotive Sensor Protection | Industrial Motor Drive Gate Protection |
|---|---|
Use Scenario: Protecting analog output lines of pressure, temperature, or position sensors in engine bay or chassis modules from ISO 7637-2 pulse 1, 2a, and 5a transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between sensor output and ECU input, absorbing surge energy before it reaches ADC front-end or op-amp buffer. Use Value: Prevents latch-up or permanent damage to 12-bit or higher resolution sensor signal chains operating at ±5 V or 0–5 V ranges. | Use Scenario: Safeguarding gate drivers and high-side/low-side MOSFET gates in variable-frequency drives subjected to cross-conduction spikes and Miller-induced ringing. IC Role / Device Role / Timing Role: TVS placed directly across gate-source terminals to clamp dv/dt-induced voltage excursions exceeding VGS(max). Use Value: Limits gate voltage to ≤69.4 V during 43.2 A surge, preventing oxide breakdown and ensuring MOSFET reliability over >100,000 switching cycles. |
| Telecom Line Interface Protection | Computer Power Rail Transient Suppression |
Use Scenario: Shielding RS-485 transceivers and Ethernet PHY interfaces from lightning-induced surges on outdoor cabling or PoE-powered ports. IC Role / Device Role / Timing Role: Unidirectional TVS installed on differential data lines (A/B) and common-mode bus, referenced to local ground plane. Use Value: Maintains signal integrity by clamping transients within 1 ns while adding <1 pF capacitance - critical for >10 Mbps data rates. | Use Scenario: Guarding 48 V intermediate bus rails in server PSUs and telecom rectifiers against switch-mode noise and hot-swap transients. IC Role / Device Role / Timing Role: TVS mounted at point-of-load near DC-DC controller ICs to suppress overshoot during load step changes or fault recovery. Use Value: Ensures VIN remains below 69.4 V during 3000 W pulses, avoiding brownout resets or overvoltage lockout in PMICs and microcontrollers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43AHE3/A | Same VWM/VBR, but lower PPPM = 600 W in SMB (DO-214AA); RθJA = 110 °C/W. | Lower power handling limits use to sub-1 kW transients; unsuitable for automotive load dump. | Select when space-constrained layouts require smaller footprint and transient energy is ≤600 W. |
| SMCJ43AHE3/A | Identical SMC package, same PPPM = 3000 W, but VBR min = 47.8 V (same), yet not AEC-Q101 qualified. | Lacks automotive qualification; requires additional validation for vehicle programs. | Choose for industrial or consumer systems where AEC-Q101 is not mandated and cost sensitivity favors non-automotive grade. |
Compared with SMBJ43AHE3/A and SMCJ43AHE3/A, the 3KASMC43AHE3_B/H delivers identical clamping performance and package size but adds AEC-Q101 qualification and guaranteed 185 °C operation - making it the only option qualified for under-hood automotive deployment without derating.
Availability
3KASMC43AHE3_B/H is available at Aetrix Electronics and suitable for automotive sensor protection, industrial motor drive gate protection, and telecom line interface protection requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for 3KASMC43AHE3_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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with emphasis on high-reliability, high-temperature, and automotive-qualified components.
The 3KASMCxxA family was developed specifically for AEC-Q101-compliant transient suppression in harsh-environment applications - targeting under-hood automotive electronics, industrial automation, and infrastructure equipment where thermal stability and surge immunity are critical.
FAQ
What is the clamping voltage of the 3KASMC43AHE3_B/H at its rated peak pulse current?
The 3KASMC43AHE3_B/H has a maximum clamping voltage (VC) of 69.4 V at its rated peak pulse current (IPPM) of 43.2 A, measured using a 10/1000 μs waveform. This value defines the upper voltage limit imposed on protected circuits during worst-case transients and is critical for ensuring downstream ICs remain within their absolute maximum ratings. The 3KASMC43AHE3_B/H achieves this clamping performance while maintaining low incremental surge resistance.
Is the 3KASMC43AHE3_B/H qualified for automotive applications?
Yes, the 3KASMC43AHE3_B/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation in datasheet 88480. It is rated for operation from -65 °C to +185 °C and meets MSL Level 1 reflow requirements. This qualification makes the 3KASMC43AHE3_B/H suitable for use in engine control units, ADAS sensors, and other automotive subsystems requiring validated reliability under thermal and mechanical stress.
What does the "B/H" suffix in 3KASMC43AHE3_B/H indicate?
The "B/H" suffix in 3KASMC43AHE3_B/H specifies packaging and revision: "B" denotes the revision code (per Vishay's internal revision tracking), and "H" indicates the preferred package code for 7-inch diameter plastic tape and reel, containing 850 units per reel. This format aligns with Vishay's ordering information table and ensures compatibility with standard SMT pick-and-place equipment.
How does the thermal resistance of the 3KASMC43AHE3_B/H affect PCB layout?
With a typical junction-to-ambient thermal resistance (RθJA) of 77.5 °C/W under standard mounting conditions, the 3KASMC43AHE3_B/H requires adequate copper area on the PCB to dissipate heat during repeated surge events. Layout best practices include using minimum recommended pad dimensions (0.126" × 0.320"), connecting both terminals to inner-layer ground planes, and avoiding thermal isolation - especially important when operating near its 6.0 W steady-state power dissipation limit.
Can the 3KASMC43AHE3_B/H be used in bidirectional protection circuits?
No, the 3KASMC43AHE3_B/H is unidirectional only, as explicitly stated in the Vishay datasheet. Its electrical characteristics - including breakdown voltage, clamping behavior, and polarity marking - are defined for single-quadrant operation with cathode as the protected line terminal. For bidirectional protection, a separate device such as the SMBJ43CAHE3/A or a back-to-back configuration would be required; using the 3KASMC43AHE3_B/H in reverse bias beyond VWM risks irreversible breakdown.
3KASMC43AHE3_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):
- 43V
- Voltage - Breakdown (Min):
- 47.8V
- Voltage - Clamping (Max) @ Ipp:
- 69.4V
- Current - Peak Pulse (10/1000µs):
- 43.2A
- 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)
3KASMC43AHE3_B/H FAQ
1.How can I place an order for 3KASMC43AHE3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC43AHE3_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 3KASMC43AHE3_B/H reliable?
The price and inventory of 3KASMC43AHE3_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 3KASMC43AHE3_B/H is usually 5 days.
3.What payment methods are accepted for 3KASMC43AHE3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC43AHE3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC43AHE3_B/H?
3KASMC43AHE3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC43AHE3_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 3KASMC43AHE3_B/H?
For technical support, including 3KASMC43AHE3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC43AHE3_B/H requirements.
6.How does Aetrix verify that 3KASMC43AHE3_B/H is sourced from the original manufacturer or authorized distributors?
All 3KASMC43AHE3_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 3KASMC43AHE3_B/H meets industry standards.
7.What is the process for return or replacement of 3KASMC43AHE3_B/H?
All 3KASMC43AHE3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC43AHE3_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 3KASMC43AHE3_B/H part is unused and in its original packaging.
Return procedure for 3KASMC43AHE3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3KASMC43AHE3_B/H Tags
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