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Vishay General Semiconductor - Diodes Division SMCJ43AHM3_A/I
- Part No.:
- SMCJ43AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ43AHM3_A/I.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,565
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Product details
Overview
SMCJ43AHM3_A/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection with 43 V stand-off voltage, 69.4 V maximum clamping voltage at 21.6 A peak pulse current, and 1500 W peak pulse power rating. It protects MOSFETs, ICs, and sensor signal lines in automotive and industrial power electronics.
For engineers reviewing the SMCJ43AHM3_A/I datasheet, SMCJ43AHM3_A/I pinout, SMCJ43AHM3_A/I application, or SMCJ43AHM3_A/I equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status, halogen-free RoHS compliance, and thermal resistance of 75 °C/W junction-to-ambient under standard pad layout.
Technical Context
This TVS diode operates as a clamping device that enters avalanche breakdown when reverse voltage exceeds its 47.8–52.8 V breakdown range at 1 mA test current. Its low incremental surge resistance and fast response time enable effective suppression of 10/1000 µs transients induced by inductive switching or ESD events.
Designed for surface-mount assembly on 8.0 mm × 8.0 mm copper pads per terminal, it delivers 1500 W peak pulse power dissipation while maintaining stable clamping performance across -55 °C to +150 °C operating junction temperature range and meets JESD201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VWM) | 43 V - Maximum continuous reverse working voltage before clamping begins |
| Breakdown Voltage (VBR) | 47.8–52.8 V at 1 mA - Confirmed avalanche onset range for reliable triggering |
| Clamping Voltage (VC) | 69.4 V at 21.6 A IPPM - Limits transient voltage seen by protected circuitry |
| Peak Pulse Power (PPPM) | 1500 W - Withstands 10/1000 µs surges without degradation |
| Junction Temperature Range | -55 °C to +150 °C - Supports operation in under-hood automotive and industrial environments |
| Thermal Resistance (RθJA) | 75 °C/W - Requires minimum 8.0 mm × 8.0 mm copper pad per terminal for rated power handling |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability per stress test requirements |
| RoHS & Halogen-Free | Yes - HM3 suffix denotes halogen-free, RoHS-compliant commercial grade |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, molded plastic case with matte tin-plated leads solderable per J-STD-002 and JESD22-B102. Cathode indicated by band marking on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Reverse-biased avalanche terminal | Connected to protected line; conducts during overvoltage to shunt surge current to ground |
| Anode | Reference/ground return path | Typically tied to system ground or low-impedance return plane for effective clamping |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power rating | Enables robust protection against ISO 7637-2 Load Dump and IEC 61000-4-5 surge events in 12 V systems |
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics modules |
| Halogen-free and RoHS-compliant (HM3) | Meets environmental compliance requirements for global automotive OEM supply chains |
| Low profile SMC package | Facilitates automated placement and supports high-density PCB layouts in space-constrained modules |
| Fast response time & low clamping ratio | Clamps within picoseconds with VC/VBR ≈ 1.45, minimizing voltage overshoot on sensitive IC inputs |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Motor Drive Interface |
|---|---|
Use Scenario: Protecting microcontroller I/O and CAN transceiver pins from load dump and inductive kickback in 12 V vehicle electrical systems. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between signal line and chassis ground. Use Value: Limits transient voltage to ≤69.4 V during 1500 W surges, preventing latch-up or gate oxide damage in 3.3 V/5 V logic interfaces. | Use Scenario: Safeguarding analog sensor inputs and encoder feedback lines in variable-frequency drives exposed to motor switching noise. IC Role / Device Role / Timing Role: Standoff-clamp protector on differential encoder A/B/Z channels and 4–20 mA current loop inputs. Use Value: Maintains signal integrity by clamping transients below 70 V while exhibiting <1 μA leakage at 43 V, avoiding DC offset errors. |
| Telecom Power Supply Input | Consumer Appliance Mainboard |
Use Scenario: Secondary-side surge protection on 48 V telecom rectifier outputs feeding PoE injectors and baseband processors. IC Role / Device Role / Timing Role: High-power unidirectional clamp on DC bus prior to DC-DC converters and PMICs. Use Value: Absorbs up to 1500 W energy without failure, enabling compliance with ITU-T K.20 and IEC 61000-4-5 Level 4 immunity testing. | Use Scenario: Overvoltage protection on microcontroller reset lines and button input circuits in smart home appliances subject to ESD and power rail disturbances. IC Role / Device Role / Timing Role: Low-leakage standoff protector on 3.3 V logic rails with cathode tied to VDD and anode to GND. Use Value: Provides <1 μA reverse leakage at 43 V, eliminating false resets while clamping ESD pulses to safe levels below IC absolute maximum ratings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ43AHE3_A/I | Lower PPPM (400 W), SMA package (smaller footprint, higher RθJA = 110 °C/W) | Suitable for lower-energy transients; limited to consumer-grade non-automotive use | Select when board space is constrained and surge threat level is ≤400 W (e.g., USB port protection) |
| SMCJ43AHE3_A/I | Same electrical specs but RoHS-compliant only (not halogen-free); lacks HM3 environmental designation | Acceptable for commercial/industrial use where halogen-free requirement is not mandated | Choose when AEC-Q101 is unnecessary and halogen-free compliance is not required by OEM spec |
Compared with SMCJ43AHM3_A/I, SMAJ43AHE3_A/I offers reduced surge capacity and thermal performance in a smaller package, while SMCJ43AHE3_A/I matches core electrical behavior but omits halogen-free certification-making the HM3 variant essential for automotive Tier 1 supply chain compliance.
Availability
SMCJ43AHM3_A/I is available at Aetrix Electronics and suitable for automotive ECUs, industrial motor drives, telecom power supplies, and consumer appliance mainboards requiring stable component supply with full AEC-Q101 and halogen-free compliance.
Supply support for SMCJ43AHM3_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 diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability and application-specific performance.
The SMCJ series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom infrastructure where sustained surge immunity and long-term stability are critical.
FAQ
What is the clamping voltage of SMCJ43AHM3_A/I at its rated peak pulse current?
The SMCJ43AHM3_A/I has a maximum clamping voltage (VC) of 69.4 V when subjected to its rated peak pulse current (IPPM) of 21.6 A under a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 standards and ensures protected downstream components remain below their absolute maximum voltage ratings during surge events. The SMCJ43AHM3_A/I maintains this clamping performance across its full operating temperature range.
Is SMCJ43AHM3_A/I qualified for automotive applications?
Yes, SMCJ43AHM3_A/I is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3" and documentation in datasheet 88394. This qualification covers stress tests including high-temperature operating life, temperature cycling, and mechanical shock, validating its suitability for under-hood and chassis-mounted automotive electronics. The SMCJ43AHM3_A/I meets the reliability requirements for engine control units, body control modules, and ADAS sensor interfaces.
How does the HM3 suffix differ from HE3 in SMCJ43A variants?
The HM3 suffix on SMCJ43AHM3_A/I indicates halogen-free, RoHS-compliant, and AEC-Q101 qualified construction, whereas HE3 denotes RoHS-compliant and AEC-Q101 qualified but not halogen-free. Both meet automotive reliability standards, but HM3 satisfies additional environmental mandates from major OEMs requiring zero brominated flame retardants. The SMCJ43AHM3_A/I is therefore specified where full halogen-free compliance is contractually enforced.
What is the thermal resistance of SMCJ43AHM3_A/I and how does it affect layout?
The SMCJ43AHM3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal. To achieve rated 1500 W pulse power handling, PCB layout must provide these minimum pad dimensions and ensure adequate copper area for heat spreading. Reducing pad size increases RθJA, derating pulse power capability and risking thermal runaway during repeated surges. The SMCJ43AHM3_A/I thermal performance is validated per J-STD-020 MSL Level 1 reflow conditions.
Can SMCJ43AHM3_A/I be used in bidirectional configurations?
No, SMCJ43AHM3_A/I is a unidirectional TVS diode, as indicated by the "A" (not "CA") suffix and cathode band marking. Bidirectional operation requires the CA variant (e.g., SMCJ43CA), which has symmetrical breakdown in both polarities. Using SMCJ43AHM3_A/I in reverse-biased AC signal paths would result in forward conduction and potential failure. For bidirectional protection, select SMCJ43CAHM3_A/I or equivalent-never substitute the unidirectional SMCJ43AHM3_A/I.
SMCJ43AHM3_A/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- 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):
- 21.6A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMCJ43AHM3_A/I FAQ
1.How can I place an order for SMCJ43AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ43AHM3_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 SMCJ43AHM3_A/I reliable?
The price and inventory of SMCJ43AHM3_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 SMCJ43AHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMCJ43AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ43AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ43AHM3_A/I?
SMCJ43AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ43AHM3_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 SMCJ43AHM3_A/I?
For technical support, including SMCJ43AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ43AHM3_A/I requirements.
6.How does Aetrix verify that SMCJ43AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMCJ43AHM3_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 SMCJ43AHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMCJ43AHM3_A/I?
All SMCJ43AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ43AHM3_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 SMCJ43AHM3_A/I part is unused and in its original packaging.
Return procedure for SMCJ43AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ43AHM3_A/I Tags
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