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Vishay General Semiconductor - Diodes Division SMCJ43CAHM3_A/H
- Part No.:
- SMCJ43CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ43CAHM3_A/H.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,098
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Product details
Overview
SMCJ43CAHM3_A/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection with 1500 W peak pulse power rating, 43 V standoff voltage (VWM), and 69.4 V maximum clamping voltage (VC) at 21.6 A peak pulse current. It protects sensitive ICs and MOSFETs against inductive switching transients and lightning-induced surges in automotive and industrial power rails.
For engineers reviewing the SMCJ43CAHM3_A/H datasheet, SMCJ43CAHM3_A/H pinout, SMCJ43CAHM3_A/H application, or SMCJ43CAHM3_A/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, and compatibility with 10/1000 µs surge waveforms in harsh environments.
Technical Context
This device operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 MΩ leakage at 43 V), but triggers into low-impedance conduction when reverse voltage exceeds its 47.8–52.8 V breakdown range (VBR at 1 mA). Its glass-passivated junction ensures stable avalanche behavior and fast response (<1 ns).
Designed for surface-mount automated assembly, SMCJ43CAHM3_A/H meets MSL level 1 per J-STD-020 (peak reflow 260 °C) and supports soldering per J-STD-002/JESD 22-B102. The HM3 suffix confirms halogen-free, RoHS-compliant construction with AEC-Q101 qualification for automotive-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 47.8 V / 52.8 V at 1 mA - Ensures reliable turn-on margin above VWM with tight tolerance |
| VC @ IPPM | 69.4 V at 21.6 A - Limits downstream voltage stress during 10/1000 µs surge events |
| PPPM | 1500 W - Withstands high-energy transients without failure per IEC 61000-4-5 Level 4 |
| Junction temp. range | −55 °C to +150 °C - Supports operation in under-hood automotive and industrial ambient conditions |
| Package | SMC (DO-214AB) - Standardized 8.13 mm × 6.22 mm footprint with thermal pad compatibility |
| Qualification | AEC-Q101 qualified - Validated for automotive electronics per stress test requirements |
Pinout & Package
SMCJ43CAHM3_A/H uses the SMC (DO-214AB) surface-mount package: 2-terminal, bidirectional configuration with no polarity marking. The case is molded compound rated UL 94 V-0; terminals are matte tin-plated for solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Provides symmetrical clamping in both directions; connects to protected line or ground reference |
| Cathode | Transient return path (bidirectional) | Electrically identical to anode in CA devices; no functional distinction-device is symmetric |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC lines or floating differential signals without polarity concerns |
| 1500 W peak pulse power | Meets IEC 61000-4-5 surge immunity requirements for industrial and automotive subsystems |
| AEC-Q101 qualification | Validates reliability for automotive powertrain, body control, and ADAS modules over full temperature range |
| Halogen-free & RoHS | Complies with EU Directive 2011/65/EU and automotive material restrictions (e.g., GMW3172) |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving system-level ESD robustness |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load-dump and jump-start transients up to ±120 V. IC Role / Device Role / Timing Role: Shunt TVS diode placed between power rail and chassis ground to clamp surges within safe limits. Use Value: Limits peak voltage to ≤69.4 V during 10/1000 µs surges, preventing damage to MCU, CAN transceivers, and power regulators. | Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) in factory automation systems exposed to relay coil kickback. IC Role / Device Role / Timing Role: Bidirectional clamping element across differential signal pair or single-ended output to ground. Use Value: Suppresses >1 kV transients while maintaining <1 µA leakage at 43 V, preserving signal integrity and ADC accuracy. |
| Telecom DC Power Input Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Securing 48 V PoE-powered equipment inputs against lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary front-end TVS on DC input stage, coordinated with upstream fuses and filters. Use Value: Absorbs 1500 W surge energy without degradation, enabling compliance with ITU-T K.21 basic protection level. | Use Scenario: Shielding BLDC motor driver ICs from back-EMF spikes generated during commutation in washing machines or HVAC fans. IC Role / Device Role / Timing Role: Parallel-connected TVS across H-bridge supply rails to clamp inductive flyback voltage. Use Value: Clamps transients to ≤69.4 V within nanoseconds, preventing gate oxide rupture in 600 V MOSFETs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ43CAHE3_A/H | Lower PPPM (400 W), same VWM/VC, SMA package (smaller footprint, lower thermal mass) | Suitable only for lower-energy transients (IEC 61000-4-2 contact discharge); not recommended for load-dump | Select if space-constrained and surge threat level is limited to ESD or low-energy switching noise. |
| SMCJ43CA-E3/57T | Same electrical specs and package, but commercial-grade (non-AEC-Q101) and RoHS-compliant without halogen-free certification | Acceptable for industrial/commercial designs where automotive qualification is not required | Choose for cost-sensitive non-automotive applications with identical clamping performance and layout compatibility. |
Compared with SMAJ43CAHE3_A/H and SMCJ43CA-E3/57T, SMCJ43CAHM3_A/H uniquely combines 1500 W surge handling, AEC-Q101 qualification, and halogen-free compliance-making it the only option qualified for high-reliability automotive power rail protection where all three attributes are mandatory.
Availability
SMCJ43CAHM3_A/H is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface development, and telecom power input protection requiring stable component supply across long production lifecycles.
Supply support for SMCJ43CAHM3_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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMCJ series is engineered for high-power transient suppression in demanding environments, targeting automotive, industrial, and telecom infrastructure where robustness against repetitive surge events is critical.
FAQ
What does the "CA" suffix indicate in SMCJ43CAHM3_A/H?
The "CA" suffix denotes a bidirectional configuration: SMCJ43CAHM3_A/H provides symmetrical clamping in both forward and reverse directions, making it suitable for AC-coupled lines, differential signals, or ungrounded systems where polarity cannot be guaranteed. Unlike unidirectional "A" variants, it has no cathode band marking and identical VBR characteristics in either direction.
Is SMCJ43CAHM3_A/H compatible with lead-free reflow processes?
Yes, SMCJ43CAHM3_A/H is qualified for lead-free reflow soldering with a maximum peak temperature of 260 °C per J-STD-020 MSL level 1. Its matte tin-plated terminals meet J-STD-002 and JESD 22-B102 solderability standards, and the package is rated for standard 7" or 13" tape-and-reel delivery formats.
How does the HM3 suffix differ from M3 or HE3 in Vishay's ordering nomenclature?
The HM3 suffix in SMCJ43CAHM3_A/H specifies halogen-free, RoHS-compliant, and AEC-Q101-qualified construction. In contrast, M3 indicates halogen-free/RoHS without AEC-Q101, and HE3 indicates RoHS-compliant/AEC-Q101-qualified but not halogen-free. HM3 is the strictest material and qualification tier for automotive use.
What is the maximum clamping voltage of SMCJ43CAHM3_A/H under surge conditions?
The maximum clamping voltage (VC) of SMCJ43CAHM3_A/H is 69.4 V at 21.6 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during worst-case surge events.
Can SMCJ43CAHM3_A/H replace unidirectional SMCJ43AHM3_A/H in existing designs?
No-SMCJ43CAHM3_A/H is bidirectional and lacks polarity marking, while SMCJ43AHM3_A/H is unidirectional with a cathode band. Substitution requires verifying that the circuit does not rely on DC blocking or directional conduction. Layout changes may be needed if grounding topology assumes unidirectional behavior.
SMCJ43CAHM3_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:
- -
- Bidirectional Channels:
- 1
- 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)
SMCJ43CAHM3_A/H FAQ
1.How can I place an order for SMCJ43CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ43CAHM3_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 SMCJ43CAHM3_A/H reliable?
The price and inventory of SMCJ43CAHM3_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 SMCJ43CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMCJ43CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ43CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ43CAHM3_A/H?
SMCJ43CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ43CAHM3_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 SMCJ43CAHM3_A/H?
For technical support, including SMCJ43CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ43CAHM3_A/H requirements.
6.How does Aetrix verify that SMCJ43CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMCJ43CAHM3_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 SMCJ43CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMCJ43CAHM3_A/H?
All SMCJ43CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ43CAHM3_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 SMCJ43CAHM3_A/H part is unused and in its original packaging.
Return procedure for SMCJ43CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ43CAHM3_A/H Tags
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