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Vishay General Semiconductor - Diodes Division SMCJ43AHE3_A/H
- Part No.:
- SMCJ43AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ43AHE3_A/H.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,378
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Product details
Overview
SMCJ43AHE3_A/H from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection on DC power rails and signal lines. It features 43 V stand-off voltage (VWM), 69.4 V maximum clamping voltage at 21.6 A peak pulse current (10/1000 µs), and 1500 W peak pulse power rating. Used to protect MOSFETs, ICs, and sensor interfaces against inductive switching transients and ESD in automotive and industrial systems.
For engineers reviewing the SMCJ43AHE3_A/H datasheet, SMCJ43AHE3_A/H pinout, SMCJ43AHE3_A/H application, or SMCJ43AHE3_A/H equivalent, key selection criteria include clamping performance under 10/1000 µs surges, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), unidirectional polarity marking, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
The SMCJ43AHE3_A/H operates as a silicon avalanche diode that enters breakdown when reverse voltage exceeds its 47.8–52.8 V breakdown range (VBR at 1 mA). Its low incremental surge resistance enables rapid energy diversion during transients, while glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and long-term reliability.
Designed for unidirectional protection only, it exhibits cathode-band polarity marking and complies with MSL level 1 per J-STD-020 (peak reflow 260 °C). Junction temperature range spans −55 °C to +150 °C, with thermal resistance from junction-to-lead of 15 °C/W - critical for sustained power dissipation in compact PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - Maximum continuous reverse operating voltage before significant leakage; defines safe DC rail margin. |
| VBR min/max | 47.8 V / 52.8 V at 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 69.4 V at 21.6 A - Clamped voltage during 10/1000 µs surge; determines protected circuit's maximum stress level. |
| PPPM | 1500 W - Peak pulse power handling capability; supports high-energy transients like ISO 7637-2 Pulse 5a. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance on standard pad layout; guides heatsinking and power derating above 25 °C. |
| TJ max | +150 °C - Maximum junction temperature; sets upper limit for ambient + self-heating in sealed enclosures. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. Cathode identified by black band on body end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path); carries forward surge current during clamping. |
| Cathode | Reverse-biased terminal | Marked with band; connected to protected line (e.g., 43 V rail); avalanche conduction occurs here during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SMC package | Enables high-density PCB layouts and compatibility with automated pick-and-place equipment (0.320" × 0.246" footprint). |
| Glass-passivated junction | Ensures stable electrical parameters over time and environmental stress, reducing parameter drift in humid or thermally cycled environments. |
| 1500 W peak pulse power | Provides robust protection against severe transients such as load dump (ISO 16750-2) and inductive kickback without degradation. |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body electronics, and ADAS modules requiring extended lifetime and failure mode coverage. |
| MSL Level 1 rating | Allows unlimited floor life and single-reflow processing at 260 °C peak, eliminating moisture sensitivity concerns in manufacturing. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 42 V battery-fed ECUs from load dump transients up to 120 V during alternator regulation failure. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery rail and downstream DC/DC converter input. Use Value: Limits voltage seen by converter IC to ≤69.4 V during 10/1000 µs surges, preventing latch-up or gate oxide damage. | Use Scenario: Safeguarding analog outputs of pressure sensors in hydraulic control units exposed to relay coil flyback. IC Role / Device Role / Timing Role: TVS placed across sensor output line and ground to shunt inductive spikes before reaching ADC input. Use Value: Maintains signal integrity by clamping transients within 1 ns response time, avoiding ADC saturation or data corruption. |
| Telecom DC Power Input Protection | Consumer Device USB Port ESD Suppression |
Use Scenario: Securing −48 V telecom rectifier outputs against lightning-induced surges entering central office equipment. IC Role / Device Role / Timing Role: Primary-level TVS on input bus prior to upstream fuse and filtering stage. Use Value: Absorbs up to 1500 W surge energy without failure, preserving system uptime and reducing need for redundant protection stages. | Use Scenario: Adding secondary-level surge immunity to USB VBUS line in portable medical monitors subjected to hospital-grade ESD events. IC Role / Device Role / Timing Role: Standoff-rated TVS (43 V) placed after USB power switch to handle residual transients post-primary protection. Use Value: Complements internal port protection by clamping fast-rising ESD pulses to <70 V, meeting IEC 61000-4-2 Level 4 requirements. |
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 | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher RθJA (110 °C/W) | Not suitable for >500 W surge environments; limited thermal margin in enclosed spaces | Select when board space is constrained and surge energy is ≤400 W (e.g., low-power IoT nodes). |
| SMCJ43CAHE3_A/H | Bidirectional variant; same VWM, VC, and PPPM but symmetrical clamping in both polarities | Required for AC-coupled or floating signal lines where polarity reversal may occur | Choose for RS-485, CAN, or Ethernet PHY protection where bidirectional surge immunity is mandatory. |
Compared with SMAJ43AHE3/A and SMCJ43CAHE3_A/H, the SMCJ43AHE3_A/H delivers superior thermal performance and surge capacity in the same SMC footprint - making it optimal for high-reliability 43 V DC rail protection where AEC-Q101 compliance and 1500 W headroom are required.
Availability
SMCJ43AHE3_A/H is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface design, and telecom DC input protection requiring stable component supply and full traceability.
Supply support for SMCJ43AHE3_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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific validation.
The SMCJ series targets high-energy transient suppression in harsh environments; engineered for automotive, industrial, and telecom infrastructure where AEC-Q101 qualification, high PPPM, and stable clamping are non-negotiable.
FAQ
What is the clamping voltage of the SMCJ43AHE3_A/H under a 10/1000 µs surge?
The SMCJ43AHE3_A/H clamps to a maximum of 69.4 V when subjected to its rated peak pulse current of 21.6 A using the standardized 10/1000 µs waveform. This value is measured at the device terminals under specified test conditions (mounted on 8.0 mm × 8.0 mm copper pads) and defines the upper voltage limit imposed on protected circuitry during surge events. The SMCJ43AHE3_A/H maintains this clamping performance across its qualified temperature range.
Is the SMCJ43AHE3_A/H suitable for automotive applications?
Yes, the SMCJ43AHE3_A/H is AEC-Q101 qualified, meaning it has passed rigorous stress tests including temperature cycling, high-temperature reverse bias, and ESD per automotive reliability standards. Its construction - glass-passivated junction, matte tin-plated leads, and MSL Level 1 rating - supports use in engine control units, body controllers, and ADAS modules. The SMCJ43AHE3_A/H is explicitly designated for automotive use via the "HE3" suffix and revision code "A/H".
How does the SMCJ43AHE3_A/H differ from the bidirectional SMCJ43CAHE3_A/H?
The SMCJ43AHE3_A/H is unidirectional and features a cathode band for polarity identification, while the SMCJ43CAHE3_A/H is bidirectional with no polarity marking and symmetrical clamping in both directions. Both share identical VWM (43 V), VC (69.4 V), and PPPM (1500 W), but the SMCJ43AHE3_A/H is intended for DC rail protection where polarity is fixed, whereas the SMCJ43CAHE3_A/H suits AC or floating signal lines like CAN or RS-485. The SMCJ43AHE3_A/H cannot replace the CA version in bidirectional applications.
What is the thermal resistance of the SMCJ43AHE3_A/H, and how does it affect layout?
The SMCJ43AHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the minimum recommended 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. This value directly impacts power derating: at 85 °C ambient, the device must be derated to ~4.3 W continuous dissipation to maintain TJ ≤ 150 °C. Layouts should replicate the specified pad size and avoid thermal isolation to ensure accurate thermal modeling. The SMCJ43AHE3_A/H's RθJL of 15 °C/W further supports localized heat transfer to PCB copper.
Can the SMCJ43AHE3_A/H be used in place of the SMAJ43AHE3/A?
No - while both are unidirectional 43 V TVS diodes, the SMCJ43AHE3_A/H (SMC package) offers 1500 W peak pulse power and lower thermal resistance (75 °C/W), whereas the SMAJ43AHE3/A (SMA package) is rated for only 400 W and has RθJA = 110 °C/W. Substituting the SMCJ43AHE3_A/H into an SMA footprint is mechanically impossible and electrically unsafe due to mismatched surge capacity. The SMCJ43AHE3_A/H requires its native SMC pad layout and is not a drop-in replacement for SMAJ43AHE3/A.
SMCJ43AHE3_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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMCJ43AHE3_A/H FAQ
1.How can I place an order for SMCJ43AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ43AHE3_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 SMCJ43AHE3_A/H reliable?
The price and inventory of SMCJ43AHE3_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 SMCJ43AHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMCJ43AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ43AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ43AHE3_A/H?
SMCJ43AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ43AHE3_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 SMCJ43AHE3_A/H?
For technical support, including SMCJ43AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ43AHE3_A/H requirements.
6.How does Aetrix verify that SMCJ43AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMCJ43AHE3_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 SMCJ43AHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMCJ43AHE3_A/H?
All SMCJ43AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ43AHE3_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 SMCJ43AHE3_A/H part is unused and in its original packaging.
Return procedure for SMCJ43AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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