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Vishay General Semiconductor - Diodes Division SMCJ43HE3/57T
- Part No.:
- SMCJ43HE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ43HE3/57T.pdf
- Description:
- TVS DIODE 43VWM 76.7VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,237
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Product details
Overview
SMCJ43HE3/57T from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-214AB (SMCJ) package, designed for robust overvoltage protection of sensitive electronics. It features a 43 V stand-off voltage (VWM), 47.8–52.8 V breakdown voltage (VBR) at 1 mA, 69.4 V clamping voltage (VC) at 21.6 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - deployed on power rails and signal lines in automotive ECUs and industrial motor drives.
For engineers reviewing the SMCJ43HE3/57T datasheet, SMCJ43HE3/57T pinout, SMCJ43HE3/57T application, or SMCJ43HE3/57T equivalent, key selection criteria include verified AEC-Q101 qualification, unidirectional polarity with cathode band marking, RoHS-compliant matte tin plating, and thermal resistance (RθJA = 75 °C/W) validated under JEDEC-standard mounting conditions.
Technical Context
The SMCJ43HE3/57T operates as a silicon avalanche diode that enters controlled breakdown above its VWM to clamp transient surges, diverting energy away from downstream circuitry. Its glass-passivated junction ensures stable leakage (<1.0 µA at 43 V) and repeatable VBR tolerance (±5%), while low incremental surge resistance enables effective suppression of fast-rising transients from inductive switching or ESD events.
Designed for surface-mount assembly on 8.0 mm × 8.0 mm copper pads per terminal, it meets MSL Level 1 per J-STD-020 and supports lead-free reflow up to 260 °C peak. The device sustains 200 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine) and operates across –55 °C to +150 °C junction temperature range - enabling use in under-hood automotive environments and high-temperature industrial controls.
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 IT = 1 mA - tight breakdown window ensures predictable turn-on threshold |
| VC @ IPPM | 69.4 V at 21.6 A - clamping voltage limits downstream stress during 1500 W transient events |
| PPPM | 1500 W (10/1000 µs) - rated surge power handling capability under standardized waveform |
| ID @ VWM | ≤1.0 µA - ultra-low leakage preserves signal integrity and minimizes standby power loss |
| TJ max | +150 °C - enables deployment in high-ambient-temperature applications without derating |
| RθJA | 75 °C/W - thermal resistance measured on JEDEC-standard 0.31" × 0.31" copper pads |
Pinout & Package
Package: DO-214AB (SMCJ), molded plastic case with matte tin-plated leads; polarity indicated by cathode band on one end; compliant with UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection in unidirectional configuration | Connected to ground or low-voltage reference; current flows from cathode to anode during clamping |
| Cathode | High-side connection; marked with band | Connected to protected line (e.g., 43 V rail); avalanche conduction initiates when voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD22 standards |
| Glass passivated junction | Ensures long-term stability of VBR and leakage performance under thermal and humidity stress |
| MSL Level 1 moisture sensitivity | Zero floor life limitation - can be stored indefinitely before reflow without baking |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes overvoltage overshoot during surge events, reducing risk to downstream ICs like MCUs and gate drivers |
| RoHS-compliant & whisker-tested (JESD201 Class 2) | Meets automotive supply chain requirements for lead-free assembly and long-term interconnect reliability |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 42 V battery-supplied control modules (e.g., body control units) against load dump transients up to ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and DC-DC input to clamp surges before they reach regulator ICs. Use Value: Withstands 1500 W pulses and clamps at ≤69.4 V, preventing damage to 50 V-rated input stages of buck converters and microcontrollers. | Use Scenario: Shielding analog sensor outputs (e.g., pressure or temperature transducers) from ESD and cable discharge events in factory automation systems. IC Role / Device Role / Timing Role: TVS connected between signal line and ground to shunt fast transients while preserving low-capacitance signal path. Use Value: Ultra-low leakage (<1 µA) avoids DC offset errors; fast response time ensures sub-nanosecond clamping before op-amp inputs saturate. |
| Motor Drive Gate Driver Protection | Telecom DC Power Input Protection |
Use Scenario: Safeguarding high-side IGBT/MOSFET gate driver ICs from Miller-induced voltage spikes during switching transitions. IC Role / Device Role / Timing Role: TVS placed across gate-to-source terminals to clamp dv/dt-induced overshoot exceeding VGS(max). Use Value: Tight VBR tolerance (±5%) ensures consistent triggering near gate driver's absolute maximum rating, avoiding false triggering or insufficient clamping. | Use Scenario: Protecting primary-side DC-DC converters in telecom base station power supplies from lightning-induced surges on -48 V input lines. IC Role / Device Role / Timing Role: Unidirectional TVS installed at input connector to absorb 10/1000 µs surges per IEC 61000-4-5 Level 4. Use Value: 1500 W PPPM rating and 69.4 V VC enable compliance with stringent telecom surge immunity requirements without cascaded protection stages. |
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), smaller DO-214AC (SMA) package, same VWM/VBR range | Not suitable for 1500 W load dump; limited to lower-energy transients in space-constrained consumer designs | Select only if system-level surge testing confirms <400 W requirement and PCB layout cannot accommodate SMCJ footprint. |
| SMCJ43AHE3/57T | Identical electrical specs and AEC-Q101 qualification; differs only in packaging suffix (HE3 vs. HE3/57T denotes same tape-and-reel format) | No functional difference; both meet identical automotive reliability and thermal specifications | SMCJ43HE3/57T and SMCJ43AHE3/57T are functionally interchangeable - verify part marking consistency with supplier documentation. |
Compared with SMAJ43A-E3/57T, the SMCJ43HE3/57T delivers 3.75× higher surge power handling and superior thermal dissipation due to larger DO-214AB package; versus SMCJ43AHE3/57T, it is electrically and mechanically identical - differing only in documented orderable part number formatting, not performance or qualification.
Availability
SMCJ43HE3/57T 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 across extended production lifecycles.
Supply support for SMCJ43HE3/57T 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 automotive-grade qualification.
The SMCJ series belongs to Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where AEC-Q101 validation and 1500 W surge capability are mandatory.
FAQ
What is the clamping voltage of the SMCJ43HE3/57T and how is it measured?
The SMCJ43HE3/57T has a maximum clamping voltage (VC) of 69.4 V, measured at a peak pulse current (IPPM) of 21.6 A using a standardized 10/1000 µs double-exponential waveform. This value is guaranteed per Vishay's datasheet (Document Number 88394) and reflects the voltage across the device during worst-case surge conditions - critical for verifying downstream component voltage margins.
Is the SMCJ43HE3/57T suitable for automotive applications?
Yes, the SMCJ43HE3/57T is AEC-Q101 qualified and explicitly rated for automotive use. Its construction includes glass-passivated junction, MSL Level 1 moisture sensitivity, and operation up to +150 °C junction temperature - meeting requirements for engine control units, body electronics, and ADAS power domains as confirmed in Vishay's qualification report referenced in Document 88394.
What does the "HE3/57T" suffix indicate in SMCJ43HE3/57T?
The "HE3" suffix denotes RoHS-compliant construction with AEC-Q101 qualification and JESD201 Class 2 whisker resistance; "57T" specifies packaging in 7-inch diameter plastic tape-and-reel with 850 units per reel. This matches Vishay's ordering code convention in the SMCJ family datasheet and ensures compatibility with automated SMT placement equipment.
How does the SMCJ43HE3/57T differ from bi-directional SMCJ43CA variants?
The SMCJ43HE3/57T is unidirectional, with polarity marked by a cathode band and intended for DC line protection where reverse conduction must be blocked. In contrast, SMCJ43CA is bi-directional, lacks polarity marking, and clamps transients of either polarity - making it suitable for AC signal lines or differential buses, but unsuitable for applications requiring reverse-blocking functionality.
What is the thermal resistance of the SMCJ43HE3/57T and how is it validated?
The SMCJ43HE3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W, measured under JEDEC-standard conditions: mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. This value is published in Vishay's datasheet (Document 88394, page 3) and used to calculate safe operating area under sustained power dissipation or repeated surge conditions.
SMCJ43HE3/57T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 43V
- Voltage - Breakdown (Min):
- 47.8V
- Voltage - Clamping (Max) @ Ipp:
- 76.7V
- Current - Peak Pulse (10/1000µs):
- 19.6A
- 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)
SMCJ43HE3/57T FAQ
1.How can I place an order for SMCJ43HE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ43HE3/57T 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 SMCJ43HE3/57T reliable?
The price and inventory of SMCJ43HE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ43HE3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ43HE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ43HE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ43HE3/57T?
SMCJ43HE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ43HE3/57T 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 SMCJ43HE3/57T?
For technical support, including SMCJ43HE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ43HE3/57T requirements.
6.How does Aetrix verify that SMCJ43HE3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ43HE3/57T 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 SMCJ43HE3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ43HE3/57T?
All SMCJ43HE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ43HE3/57T, 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 SMCJ43HE3/57T part is unused and in its original packaging.
Return procedure for SMCJ43HE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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