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Vishay General Semiconductor - Diodes Division SMCJ43AHM3_A/H
- Part No.:
- SMCJ43AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ43AHM3_A/H.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,354
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Product details
Overview
SMCJ43AHM3_A/H 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. It features 43 V standoff voltage (VWM), 47.8–52.8 V breakdown voltage (VBR) at 1 mA, 1500 W peak pulse power (10/1000 µs), 69.4 V clamping voltage at 21.6 A IPPM, and operates from –55 °C to +150 °C junction temperature - deployed on automotive power rails and industrial sensor interfaces.
For engineers reviewing the SMCJ43AHM3_A/H datasheet, SMCJ43AHM3_A/H pinout, SMCJ43AHM3_A/H application, or SMCJ43AHM3_A/H equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification (HM3 suffix), halogen-free RoHS compliance, 1500 W surge rating, and SMC package thermal performance with RθJA = 75 °C/W.
Technical Context
This TVS diode uses a glass-passivated silicon junction optimized for fast response (<1 ns) to transient overvoltages and low incremental surge resistance. Its unidirectional configuration provides cathode-anode polarity with band-marked cathode end, enabling precise placement in DC-biased circuits such as automotive ECUs and industrial I/O lines.
The device meets MSL Level 1 per J-STD-020, supports 260 °C lead-free reflow, and delivers stable clamping under repetitive surge stress when mounted on 8.0 mm × 8.0 mm copper pads. Its 0.102 %/°C VBR temperature coefficient ensures predictable breakdown behavior across wide operating temperatures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - maximum continuous reverse working voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR min/max | 47.8 V / 52.8 V at IT = 1 mA - guaranteed breakdown range ensuring reliable turn-on during transients. |
| VC @ IPPM | 69.4 V at 21.6 A - clamping voltage limits downstream IC stress during 1500 W surge events. |
| PPPM | 1500 W (10/1000 µs waveform) - peak energy absorption capacity for lightning and inductive switching surges. |
| TJ max | +150 °C - enables use in under-hood automotive environments and high-temperature industrial enclosures. |
| Package | SMC (DO-214AB) - standardized surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height for automated assembly. |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness. |
Pinout & Package
SMCJ43AHM3_A/H uses the standard SMC (DO-214AB) package: two-terminal, unidirectional configuration with cathode marked by a band on the body. Leads are matte tin-plated, solderable per J-STD-002 and JESD 22-B102, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | High-side connection in DC bias path | Connected to positive rail or signal source; conducts during reverse transient to clamp voltage. |
| Anode | Low-side reference node | Typically tied to ground or return path; completes current loop during surge conduction. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Withstands high-energy transients from load dump or inductive kick without degradation. |
| Fast response time (<1 ns) | Clamps before sensitive downstream logic or analog circuitry experiences overvoltage damage. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including engine control, ADAS sensors, and infotainment power supplies. |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for global OEM supply chains and industrial certifications. |
| MSL Level 1 moisture sensitivity | Enables direct placement without baking; compatible with standard 260 °C lead-free reflow profiles. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed microcontrollers and CAN transceivers against ISO 7637-2 Pulse 1, 2a, and 5a load-dump transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBAT and GND, clamping surges before they reach LDO inputs or MCU VDD pins. Use Value: Limits clamped voltage to ≤69.4 V during 1500 W surges, preserving system uptime and avoiding brownout resets. |
Use Scenario: Safeguarding 4–20 mA current-loop transmitters and RS-485 nodes in factory automation against EFT and surge coupling. IC Role / Device Role / Timing Role: Mounted across signal line and local ground to shunt induced transients before reaching precision ADC or isolator inputs. Use Value: Maintains signal integrity by clamping <100 ns after surge onset, preventing latch-up or input-stage damage in analog front-ends. |
| DC Motor Drive Board Protection | Telecom Power Supply Input Stage |
|
Use Scenario: Suppressing back-EMF spikes generated by brushed DC motor commutation in robotic actuators and HVAC blowers. IC Role / Device Role / Timing Role: Connected across motor terminals or H-bridge supply rails to absorb inductive energy during PWM switching transitions. Use Value: Absorbs up to 1500 W of transient energy without failure, extending MOSFET lifetime and reducing field returns. |
Use Scenario: Front-end surge suppression on AC/DC adapter outputs feeding telecom base station controllers and PoE injectors. IC Role / Device Role / Timing Role: Placed after bulk capacitor but before primary regulator to limit overvoltage propagation into downstream DC-DC stages. Use Value: Clamps to 69.4 V within nanoseconds, preventing overvoltage shutdown or catastrophic failure of 48 V intermediate bus regulators. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ43A-E3/57T | Lower PPPM (400 W), SMA package (smaller thermal mass), non-AEC-Q101, RoHS-compliant only. | Suitable for cost-sensitive consumer electronics; insufficient for automotive load-dump immunity. | Select when board space is constrained and surge energy is ≤400 W; not recommended for AEC-Q101 systems. |
| SMCJ43AHE3_A/H | Same electrical specs and SMC package, but E3 suffix indicates standard RoHS (non-halogen-free) and no AEC-Q101 qualification. | Acceptable for commercial/industrial use where halogen-free or automotive qualification is not required. | Choose for non-automotive designs needing identical clamping performance without halogen-free or AEC-Q101 mandates. |
Compared with SMCJ43AHM3_A/H, SMAJ43A-E3/57T offers smaller footprint but lower surge capability and no automotive qualification, while SMCJ43AHE3_A/H matches performance but lacks halogen-free construction and AEC-Q101 validation - making SMCJ43AHM3_A/H the sole option meeting all three requirements simultaneously.
Availability
SMCJ43AHM3_A/H is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor modules, and telecom power supply designs requiring stable component supply, long-term lifecycle support, and full traceability.
Supply support for SMCJ43AHM3_A/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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMCJ series targets high-energy transient suppression in harsh environments - engineered for automotive, industrial, and telecom systems where robustness, AEC-Q101 compliance, and repeatable clamping performance are mandatory.
FAQ
What is the clamping voltage of SMCJ43AHM3_A/H at its rated peak pulse current?
The SMCJ43AHM3_A/H has a maximum clamping voltage (VC) of 69.4 V at its rated peak pulse current (IPPM) of 21.6 A, measured using the standard 10/1000 µs waveform. This value ensures downstream components remain within safe operating voltage limits during surge events. The SMCJ43AHM3_A/H maintains this clamping performance across its full operating temperature range and after repeated surge exposures when properly mounted.
Is SMCJ43AHM3_A/H qualified for automotive applications?
Yes, SMCJ43AHM3_A/H is AEC-Q101 qualified, as confirmed by the HM3 suffix in its ordering code. This qualification covers stress tests including high-temperature reverse bias, temperature cycling, and ESD robustness - validating its suitability for under-hood and chassis-mounted automotive systems. The SMCJ43AHM3_A/H meets these requirements without derating in ambient temperatures up to +125 °C.
What does the "HM3" suffix indicate in SMCJ43AHM3_A/H?
The "HM3" suffix in SMCJ43AHM3_A/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It distinguishes this variant from E3 (RoHS only), HE3 (AEC-Q101 + RoHS), and M3 (halogen-free + RoHS, no AEC-Q101) versions. The SMCJ43AHM3_A/H therefore satisfies strict environmental and automotive reliability standards simultaneously - critical for Tier 1 automotive suppliers.
How does SMCJ43AHM3_A/H compare to bidirectional TVS diodes like SMCJ43CA?
SMCJ43AHM3_A/H is unidirectional and intended for DC-biased circuits, whereas SMCJ43CA is bidirectional for AC or floating signal lines. The SMCJ43AHM3_A/H has a defined cathode band and conducts only in reverse bias, offering tighter leakage control (ID ≤ 1.0 µA at 43 V) versus bidirectional types. Use SMCJ43AHM3_A/H where polarity is fixed and low reverse leakage is essential - such as in automotive power rails.
What PCB layout guidance applies to SMCJ43AHM3_A/H for optimal thermal and surge performance?
For optimal performance, mount SMCJ43AHM3_A/H on minimum 8.0 mm × 8.0 mm copper pads per terminal to achieve specified 1500 W surge rating and thermal resistance (RθJA = 75 °C/W). Avoid narrow traces between the device and ground/power planes. The SMCJ43AHM3_A/H requires no additional heatsinking under typical conditions but benefits from internal layer copper pours connected via multiple vias for enhanced thermal dissipation in high-duty-cycle applications.
SMCJ43AHM3_A/H 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/H FAQ
1.How can I place an order for SMCJ43AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ43AHM3_A/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 SMCJ43AHM3_A/H reliable?
The price and inventory of SMCJ43AHM3_A/H 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/H is usually 5 days.
3.What payment methods are accepted for SMCJ43AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ43AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ43AHM3_A/H?
SMCJ43AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ43AHM3_A/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 SMCJ43AHM3_A/H?
For technical support, including SMCJ43AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ43AHM3_A/H requirements.
6.How does Aetrix verify that SMCJ43AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMCJ43AHM3_A/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 SMCJ43AHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMCJ43AHM3_A/H?
All SMCJ43AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ43AHM3_A/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 SMCJ43AHM3_A/H part is unused and in its original packaging.
Return procedure for SMCJ43AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ43AHM3_A/H Tags
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