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Vishay General Semiconductor - Diodes Division SMCJ43AHM3/H
- Part No.:
- SMCJ43AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ43AHM3/H.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,341
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Product details
Overview
SMCJ43AHM3/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed to protect sensitive electronics against voltage transients induced by inductive load switching and lightning surges. It features a 43 V stand-off voltage (VWM), 47.8–52.8 V breakdown voltage (VBR) at 1 mA test current, 1500 W peak pulse power rating (10/1000 µs waveform), and clamps to ≤69.4 V at 21.6 A peak pulse current.
For engineers reviewing the SMCJ43AHM3/H datasheet, SMCJ43AHM3/H pinout, SMCJ43AHM3/H application, or SMCJ43AHM3/H equivalent, this device is selected for robust overvoltage protection in automotive power rails, industrial sensor interfaces, and DC power supply inputs where high surge immunity, low clamping voltage, and AEC-Q101 qualification are required.
Technical Context
The SMCJ43AHM3/H operates as a unidirectional avalanche diode with glass-passivated junction, delivering fast response time (<1 ns) and low incremental surge resistance. Its clamping behavior under 10/1000 µs transients ensures predictable voltage limiting during ESD and surge events.
Designed for surface-mount assembly on standard PCB copper pads (8.0 mm × 8.0 mm per terminal), it meets MSL Level 1 per J-STD-020, supports peak forward surge current of 200 A (8.3 ms half-sine), and maintains stable operation across -55 °C to +150 °C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 43 V - Maximum continuous reverse operating voltage before conduction begins; defines safe operating margin below breakdown. |
| VBR (Breakdown Voltage) | 47.8–52.8 V at 1 mA - Confirmed avalanche onset range; ensures reliable triggering above normal system voltage. |
| VC (Clamping Voltage) | ≤69.4 V at IPPM = 21.6 A - Peak voltage seen by protected circuit during 1500 W transient; critical for IC-level survivability. |
| PPPM (Peak Pulse Power) | 1500 W (10/1000 µs) - Surge energy handling capacity; enables protection against IEC 61000-4-5 Level 4 surges. |
| ID (Reverse Leakage) | ≤1.0 µA at VWM - Negligible standby power loss and signal integrity impact in high-impedance circuits. |
| TJ max | +150 °C - Enables use in under-hood automotive environments and thermally constrained industrial enclosures. |
| Package | SMC (DO-214AB) - Standardized surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height; compatible with automated pick-and-place. |
Pinout & Package
SMCJ43AHM3/H uses the SMC (DO-214AB) package: a two-terminal surface-mount device with cathode band marking on the unidirectional variant. The package has matte tin-plated leads, complies with J-STD-002 solderability, and meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest potential node; completes conduction path during reverse transient. |
| Cathode | High-side transient input terminal | Connected to protected line (e.g., 48 V rail); carries full surge current into ground via anode during clamping. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics; supports long-term reliability under thermal cycling and vibration. |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets global environmental compliance requirements without compromising surge performance or thermal stability. |
| Low incremental surge resistance | Enables tighter clamping voltage spread and reduced voltage overshoot during high-current transients. |
| Very fast response time | <1 ns turn-on ensures protection activation before downstream ICs experience damaging overvoltage. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and reflow compatibility without baking; simplifies manufacturing logistics. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: 48 V battery-supplied ADAS camera module exposed to load dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and DC-DC converter input to clamp surges before regulation. Use Value: Clamps 1500 W transients to ≤69.4 V, preventing damage to 50 V-rated input capacitors and enabling compliance with ISO 7637-2 Pulse 5a. |
Use Scenario: Analog output line (4–20 mA) from pressure sensor in factory automation PLC rack. IC Role / Device Role / Timing Role: TVS mounted across signal and ground to suppress EFT bursts and cable-coupled surges. Use Value: 1.0 µA leakage at 43 V ensures minimal offset error in precision current loop; fast response preserves signal fidelity. |
| Telecom DC Power Input Protection | Consumer USB-C Power Delivery Line |
|
Use Scenario: -48 V telecom rectifier output feeding base station backplane. IC Role / Device Role / Timing Role: Unidirectional TVS on negative rail to absorb lightning-induced common-mode surges. Use Value: 200 A peak forward surge rating handles repetitive 8.3 ms half-sine events; 150 °C TJ max supports sealed enclosure operation. |
Use Scenario: VBUS line in portable docking station supporting USB PD 3.0 up to 20 V/5 A. IC Role / Device Role / Timing Role: Primary overvoltage clamp ahead of buck controller and port protection IC. Use Value: 43 V VWM provides 100 % margin above 20 V PD max, while 69.4 V VC prevents latch-up in downstream 60 V-rated 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 |
|---|---|---|---|
| SMAJ43AHE3/A | Same VWM (43 V) and VBR range, but lower PPPM (400 W) and smaller SMA package (DO-214AC). | Limited to lower-energy transients (IEC 61000-4-2 contact discharge only); unsuitable for IEC 61000-4-5 surge. | Select when board space is constrained and surge threat level is limited to ESD and low-energy switching noise. |
| SMCJ43AHE3/H | Identical electrical specs and SMC package, but RoHS-compliant commercial grade (E3) instead of halogen-free (HM3). | No AEC-Q101 qualification; not approved for automotive production use. | Select for cost-sensitive industrial or consumer designs where halogen-free requirement is absent and automotive qualification is unnecessary. |
Compared with SMCJ43AHM3/H, SMAJ43AHE3/A offers smaller footprint but significantly reduced surge capability, while SMCJ43AHE3/H matches mechanical and electrical performance but lacks halogen-free certification and automotive qualification-making SMCJ43AHM3/H the sole choice for AEC-Q101-compliant, environmentally regulated automotive deployments.
Availability
SMCJ43AHM3/H is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and telecom DC input surge suppression requiring stable component supply, long-lifecycle support, and traceable sourcing.
Supply support for SMCJ43AHM3/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 was developed to deliver high-power transient suppression in compact surface-mount packages for automotive, industrial, and telecom systems demanding AEC-Q101 qualification and robust surge immunity.
FAQ
What is the clamping voltage of SMCJ43AHM3/H at its rated peak pulse current?
The SMCJ43AHM3/H clamps to a maximum of 69.4 V when subjected to its peak pulse current of 21.6 A under the standard 10/1000 µs waveform. This clamping voltage is measured across the device terminals during transient conduction and defines the upper voltage limit imposed on the protected circuit. Maintaining VC ≤69.4 V ensures compatibility with 75 V-rated downstream components and supports compliance with IEC 61000-4-5 surge immunity testing.
Is SMCJ43AHM3/H qualified for automotive applications?
Yes, SMCJ43AHM3/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code structure (HM3 suffix denotes halogen-free, RoHS-compliant, and AEC-Q101 qualified). This qualification includes stress testing for temperature cycling, humidity bias, mechanical shock, and high-temperature operating life-making SMCJ43AHM3/H suitable for under-hood and chassis-mounted automotive electronics such as body control modules and ADAS power supplies.
How does the HM3 suffix differ from the HE3 suffix in the SMCJ43A family?
The HM3 suffix in SMCJ43AHM3/H indicates halogen-free, RoHS-compliant, and AEC-Q101 qualified construction, whereas HE3 denotes RoHS-compliance and AEC-Q101 qualification without halogen-free assurance. Both meet automotive reliability standards, but HM3 satisfies stricter environmental mandates (e.g., EU ELV Directive Annex II) applicable to Tier 1 suppliers and OEMs requiring zero brominated flame retardants and antimony trioxide.
What is the thermal resistance of SMCJ43AHM3/H, and how does it affect PCB layout?
SMCJ43AHM3/H has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on minimum recommended pad layout, and 15 °C/W junction-to-lead (RθJL). To maintain TJ ≤150 °C under 6.5 W steady-state dissipation, PCB copper pads must be ≥8.0 mm × 8.0 mm per terminal. Larger thermal pads or internal copper planes significantly reduce RθJA and improve surge endurance during repetitive transient events.
Can SMCJ43AHM3/H be used in bidirectional configurations?
No, SMCJ43AHM3/H is a unidirectional TVS diode, 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/H in reverse-biased AC or floating signal lines will result in unintended conduction and potential failure; always match device polarity to circuit topology.
SMCJ43AHM3/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:
- Discontinued at Digi-Key
- 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/H FAQ
1.How can I place an order for SMCJ43AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ43AHM3/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/H reliable?
The price and inventory of SMCJ43AHM3/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/H is usually 5 days.
3.What payment methods are accepted for SMCJ43AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ43AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ43AHM3/H?
SMCJ43AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ43AHM3/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/H?
For technical support, including SMCJ43AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ43AHM3/H requirements.
6.How does Aetrix verify that SMCJ43AHM3/H is sourced from the original manufacturer or authorized distributors?
All SMCJ43AHM3/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/H meets industry standards.
7.What is the process for return or replacement of SMCJ43AHM3/H?
All SMCJ43AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ43AHM3/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/H part is unused and in its original packaging.
Return procedure for SMCJ43AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ43AHM3/H Tags
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