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Vishay General Semiconductor - Diodes Division 3KASMC43AHE3_B/I
- Part No.:
- 3KASMC43AHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC43AHE3_B/I.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
3KASMC43AHE3_B/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) 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 - designed for automotive-grade overvoltage protection of power rails and signal lines in engine control units and ADAS sensor interfaces.
For engineers reviewing the 3KASMC43AHE3_B/I datasheet, 3KASMC43AHE3_B/I pinout, 3KASMC43AHE3_B/I application, or 3KASMC43AHE3_B/I 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 achieve stable clamping performance across -65 °C to +185 °C operating range. Its 10/1000 µs waveform response delivers 43.2 A peak pulse current with 69.4 V clamping voltage, while low incremental surge resistance ensures minimal voltage overshoot during ESD or load-dump transients.
The device is qualified to AEC-Q101 and meets MSL Level 1 (260 °C reflow peak), with matte tin-plated leads compliant to J-STD-002 and JESD 22-B102. The cathode band marking and DO-214AB mechanical outline enable automated optical inspection and reliable placement in high-volume automotive SMT lines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - Maximum continuous reverse operating voltage before leakage exceeds 1 µA; defines safe working margin for 36 V nominal automotive systems. |
| VBR (min/typ/max) | 47.8 / 50.3 / 52.8 V at 1 mA - Tight 5% tolerance ensures predictable turn-on during transients; used to set clamping threshold in circuit design. |
| VC @ IPPM | 69.4 V at 43.2 A - Clamping voltage limits downstream IC stress during 3000 W surge; critical for protecting 75 V-rated MOSFETs or CAN transceivers. |
| PPPM | 3000 W - Peak pulse power handling per 10/1000 µs waveform; supports ISO 7637-2 Pulse 5a (load dump) immunity up to 120 V. |
| TJ max. | +185 °C - Enables operation in under-hood environments without derating; eliminates need for additional thermal margin in ECU designs. |
| RθJA | 77.5 °C/W - Thermal resistance measured on minimum recommended pad layout; informs heatsinking requirements for sustained surge duty cycles. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, molded case meeting UL 94 V-0; cathode indicated by color band; terminals are matte tin-plated for solderability per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current sink during reverse-biased clamping | Connected to protected line (e.g., battery rail); conducts surge current to ground when VIN > VC. |
| Cathode | Reference terminal / clamping reference node | Connected to system ground; establishes clamping reference point; marked by visible band for orientation verification. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, humidity bias, and mechanical shock - required for engine bay and ADAS applications. |
| 185 °C junction rating | Enables direct placement near heat sources (e.g., power converters) without external thermal derating or forced air cooling. |
| 3000 W peak pulse power | Withstands ISO 7637-2 Load Dump (Pulse 5a) events up to 120 V × 25 A without failure or parameter shift. |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes overvoltage stress on downstream components - critical for safeguarding 5 V or 3.3 V logic interfaces coupled via transient isolation networks. |
Applications
| Engine Control Unit (ECU) Power Rail Protection | Automotive Camera Module ESD Protection |
|---|---|
Use Scenario: Protects 12 V supply input of diesel/gasoline ECU against load dump transients (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery rail and DC-DC input stage to limit voltage excursions to ≤69.4 V. Use Value: Prevents latch-up or permanent damage to buck controller ICs rated for 75 V absolute maximum, enabling robust field reliability. | Use Scenario: Shields MIPI CSI-2 data lines and power pins of rear-view camera modules from ESD (IEC 61000-4-2 ±15 kV contact) and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS (CJ < 100 pF at 0 V) placed adjacent to connector to shunt fast transients before reaching serializer/deserializer ICs. Use Value: Maintains signal integrity on 1.5 Gbps video links while meeting automotive EMC test limits without adding series impedance or timing skew. |
| ADAS Radar Sensor Power Input | Body Control Module (BCM) LIN Bus Line Protection |
Use Scenario: Guards 5 V or 3.3 V regulated supply feeding 77 GHz radar transceiver ASICs against coupled switching noise and ignition transients. IC Role / Device Role / Timing Role: Secondary TVS stage after primary bulk clamp; provides precise low-VC limiting for sensitive RF front-end bias rails. Use Value: Reduces risk of phase noise degradation or false alarm triggers caused by voltage-induced PLL jitter in mmWave receivers. | Use Scenario: Protects LIN physical layer transceivers (e.g., TLE7259) from battery reversal, jump-start surges, and inductive kickback on vehicle body networks. IC Role / Device Role / Timing Role: Unidirectional TVS connected between LIN bus line and ground to clamp negative transients below -40 V and positive spikes above 43 V. Use Value: Ensures uninterrupted communication during 12 V system faults, supporting ASAM MCD-2 MC diagnostic compliance in production diagnostics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ43AHE3_A/H | Same SMC package, 43 V VWM, but lower PPPM = 400 W; VC = 69.4 V at 5.8 A; RθJA = 110 °C/W | Not AEC-Q101 qualified; limited to consumer/industrial use; insufficient for ISO 7637-2 Pulse 5a compliance | Select only for cost-sensitive non-automotive designs where surge energy is <100 mJ. |
| SMCJ43AHE3_A/H | Same SMC package, 43 V VWM, PPPM = 1500 W; VC = 69.4 V at 21.6 A; AEC-Q101 qualified; RθJA = 85 °C/W | Lower peak power rating reduces margin for worst-case load dump; suitable for 24 V commercial vehicles but not heavy-duty 12 V systems | Choose when full 3000 W headroom is unnecessary and BOM cost optimization is prioritized over extreme transient margin. |
Compared with SMAJ43AHE3_A/H and SMCJ43AHE3_A/H, the 3KASMC43AHE3_B/I delivers 2× higher peak power than SMCJ43AHE3_A/H and full AEC-Q101 validation absent in SMAJ43AHE3_A/H - making it the only option qualified for safety-critical 12 V automotive power rail protection requiring 3000 W surge immunity.
Availability
3KASMC43AHE3_B/I is available at Aetrix Electronics and suitable for automotive electronics, engine control units, and ADAS sensor interfaces requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 3KASMC43AHE3_B/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 diodes, rectifiers, TVS devices, and optoelectronics with emphasis on reliability, thermal performance, and automotive qualification.
The 3KASMCxxA family is engineered specifically for high-temperature, high-reliability automotive transient suppression - targeting under-hood ECUs, radar modules, and camera systems where 185 °C operation and AEC-Q101 compliance are mandatory.
FAQ
What is the clamping voltage of the 3KASMC43AHE3_B/I and how is it measured?
The 3KASMC43AHE3_B/I has a maximum clamping voltage (VC) of 69.4 V at 43.2 A peak pulse current, measured using a 10/1000 µs double-exponential waveform per IEC 61000-4-5. This value represents the upper voltage limit imposed on protected circuits during standardized surge events and is verified per Vishay Document Number 88480, page 2.
Is the 3KASMC43AHE3_B/I AEC-Q101 qualified and what does that cover?
Yes, the 3KASMC43AHE3_B/I is AEC-Q101 qualified, as confirmed in the Vishay datasheet (Document Number 88480, page 1). This qualification covers stress tests including temperature cycling, high-temperature operating life, unbiased highly accelerated stress testing, and mechanical shock - validating suitability for automotive under-hood applications.
What is the meaning of the 'HE3_B/I' suffix in 3KASMC43AHE3_B/I?
The 'HE3' suffix denotes RoHS-compliant, matte tin-plated leads and AEC-Q101 qualification; 'B' indicates revision level B; 'I' specifies packaging in 13-inch diameter plastic tape and reel with 3500 units per reel - per Vishay's Ordering Information table on page 2 of Document Number 88480.
Can the 3KASMC43AHE3_B/I be used in bidirectional configurations?
No, the 3KASMC43AHE3_B/I is unidirectional only, as explicitly stated in the Features section of the Vishay datasheet. It protects against positive transients on the anode-to-cathode path and must be oriented with cathode toward ground. For bidirectional protection, a separate device such as SMBJ43CAHE3_B/I would be required.
What is the thermal resistance and how does it affect PCB layout for the 3KASMC43AHE3_B/I?
The 3KASMC43AHE3_B/I has a typical junction-to-ambient thermal resistance (RθJA) of 77.5 °C/W when mounted on the minimum recommended pad layout per Figure 4 on page 4 of the datasheet. To maintain TJ ≤ 185 °C under repeated surges, PCB copper area and via count must follow Vishay's specified footprint - reducing RθJA by up to 30% with enhanced thermal pads.
3KASMC43AHE3_B/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:
- 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/I FAQ
1.How can I place an order for 3KASMC43AHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC43AHE3_B/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 3KASMC43AHE3_B/I reliable?
The price and inventory of 3KASMC43AHE3_B/I 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/I is usually 5 days.
3.What payment methods are accepted for 3KASMC43AHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC43AHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC43AHE3_B/I?
3KASMC43AHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC43AHE3_B/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 3KASMC43AHE3_B/I?
For technical support, including 3KASMC43AHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC43AHE3_B/I requirements.
6.How does Aetrix verify that 3KASMC43AHE3_B/I is sourced from the original manufacturer or authorized distributors?
All 3KASMC43AHE3_B/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 3KASMC43AHE3_B/I meets industry standards.
7.What is the process for return or replacement of 3KASMC43AHE3_B/I?
All 3KASMC43AHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC43AHE3_B/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 3KASMC43AHE3_B/I part is unused and in its original packaging.
Return procedure for 3KASMC43AHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3KASMC43AHE3_B/I Tags
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