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Vishay General Semiconductor - Diodes Division SMCJ43CAHE3/57T
- Part No.:
- SMCJ43CAHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ43CAHE3/57T.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,283
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Product details
Overview
SMCJ43CAHE3/57T from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of sensitive electronics. It features a 43 V standoff voltage (VWM), 69.4 V maximum clamping voltage (VC) at 21.6 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 μs waveform - deployed on power rails and signal lines in automotive ECUs and industrial sensor interfaces.
For engineers reviewing the SMCJ43CAHE3/57T datasheet, SMCJ43CAHE3/57T pinout, SMCJ43CAHE3/57T application, or SMCJ43CAHE3/57T equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification, RoHS-compliant matte tin terminations, and thermal resistance (RθJA = 75 °C/W) under standard PCB pad layout per JESD22-B102.
Technical Context
This device operates as a voltage-clamped crowbar during transients, leveraging an avalanche breakdown mechanism with low incremental surge resistance and fast sub-nanosecond response time. Its bidirectional structure enables symmetric clamping in AC-coupled or floating signal paths without polarity constraints.
Designed for high-reliability environments, SMCJ43CAHE3/57T meets MSL Level 1 per J-STD-020, supports 260 °C lead-free reflow, and is qualified to AEC-Q101 for automotive use - with glass passivated junction and UL 94 V-0 molding compound ensuring long-term stability under thermal cycling and humidity stress.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 36–48 V nominal systems |
| VBR min/max | 47.8 V / 52.8 V at 1 mA - verified breakdown threshold ensures predictable turn-on across temperature and unit variation |
| VC @ IPPM | 69.4 V at 21.6 A - clamping voltage limits downstream IC stress during 10/1000 μs surge events |
| PPPM | 1500 W - peak transient energy handling capacity under standardized lightning/surge test waveform |
| RθJA | 75 °C/W - thermal resistance from junction to ambient on 8 mm × 8 mm copper pads; informs derating above 25 °C |
| TJ max | +150 °C - maximum junction temperature enabling operation in under-hood automotive environments |
| ID @ VWM | 1.0 μA - ultra-low leakage preserves signal integrity and battery life in always-on circuits |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional configuration with no polarity marking; case dimensions 7.11 mm × 6.22 mm × 2.62 mm (L × W × H); matte tin-plated leads compliant with J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Anode) | Transient conduction path (bidirectional) | Both terminals function identically; no cathode band - symmetrical clamping in either direction |
| Anode (Cathode) | Transient conduction path (bidirectional) | Identical electrical behavior to opposite terminal; eliminates orientation dependency during automated placement |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, ADAS sensors, and infotainment power domains |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-earth, 2 kV line-line) without degradation |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes overvoltage overshoot during fast transients, protecting 5 V–48 V logic and analog front-ends |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free assembly without moisture sensitivity concerns or baking requirements |
| UL 94 V-0 flammability rating | Molding compound resists ignition and flame propagation in safety-critical enclosures |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V supply inputs in body control modules against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Primary clamping element placed upstream of DC/DC converters and microcontrollers. Use Value: Limits transient voltage to ≤69.4 V during 100 ms load dump events, preventing latch-up or gate oxide damage in downstream FETs and regulators. | Use Scenario: Shielding RS-485 or CAN FD differential pairs in factory automation PLCs from ESD and inductive switching noise. IC Role / Device Role / Timing Role: Bidirectional shunt protector across differential lines, referenced to local ground. Use Value: Symmetric clamping maintains common-mode rejection while suppressing ±15 kV contact ESD per IEC 61000-4-2 without signal distortion. |
| Telecom DC Power Feeds | Consumer Appliance Motor Drive Inputs |
Use Scenario: Safeguarding PoE-powered equipment (e.g., IP cameras) from induced surges on 48 V DC input lines. IC Role / Device Role / Timing Role: Standoff-rated TVS placed between PSE output and PD input filter stage. Use Value: Withstands repeated 1500 W surges while maintaining <1.0 μA leakage at 43 V, preserving power budget and efficiency. | Use Scenario: Suppressing back-EMF spikes from brushed DC motors in smart home appliances (e.g., vacuum cleaners, washing machines). IC Role / Device Role / Timing Role: Parallel-connected TVS across motor terminals to clamp inductive kickback. Use Value: Clamps 100 V+ spikes to ≤69.4 V within nanoseconds, preventing MOSFET avalanche failure and reducing EMI radiated emissions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC43CA | Lower PPPM (400 W), same VWM (43 V), smaller SMA package (DO-214AC) | Limited to lower-energy transients; unsuitable for ISO 7637-2 or IEC 61000-4-5 compliance | Select when board space is constrained and surge threat level is limited to ESD or low-energy switching noise |
| 1.5KE43CA | Same VWM/VC specs but axial-leaded DO-15 package; higher RθJA (~100 °C/W) | Not suitable for high-density SMT layouts; requires through-hole assembly and additional mounting hardware | Choose only for legacy designs or prototyping where manual assembly is acceptable and thermal derating is managed |
Compared with SAC43CA and 1.5KE43CA, SMCJ43CAHE3/57T delivers 3.75× higher surge power handling, AEC-Q101 qualification, and optimized thermal performance in SMT form - making it the preferred choice for production-grade automotive and industrial systems requiring repeatable reliability.
Availability
SMCJ43CAHE3/57T is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and telecom DC feed surge suppression requiring stable component supply across multi-year production cycles.
Supply support for SMCJ43CAHE3/57T 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, precision, and automotive-grade qualification.
The SMCJ series targets high-energy transient suppression in harsh environments - engineered specifically for AEC-Q101 compliance, robust surge immunity, and seamless integration into automated SMT manufacturing lines.
FAQ
What does the "CA" suffix indicate in SMCJ43CAHE3/57T?
The "CA" suffix denotes a bidirectional configuration: SMCJ43CAHE3/57T provides symmetrical clamping in both polarities, unlike unidirectional variants (e.g., SMCJ43A). This makes SMCJ43CAHE3/57T ideal for AC-coupled signals, differential buses like CAN or RS-485, and floating power domains where polarity reversal may occur during transients.
Is SMCJ43CAHE3/57T qualified for automotive use?
Yes, SMCJ43CAHE3/57T carries the HE3 suffix, confirming RoHS compliance and full AEC-Q101 qualification per Vishay's documentation. It is rated for operation from −55 °C to +150 °C junction temperature and validated for mechanical shock, vibration, and temperature cycling per automotive reliability standards - making it suitable for engine bay, chassis, and ADAS applications.
How does the clamping voltage of SMCJ43CAHE3/57T compare to its standoff voltage?
SMCJ43CAHE3/57T has a 43 V standoff voltage (VWM) and clamps to a maximum of 69.4 V at its rated 21.6 A peak pulse current. This 61% overvoltage margin (VC/VWM ≈ 1.61) ensures protected circuitry remains below absolute maximum ratings during standardized 10/1000 μs surges - critical for safeguarding 48 V-rated components in telecom and automotive systems.
What is the thermal resistance of SMCJ43CAHE3/57T, and how does it affect layout design?
SMCJ43CAHE3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal. To maintain TJ ≤ 150 °C at full 1500 W surge, designers must ensure adequate copper area and avoid excessive ambient temperature rise - especially in sealed enclosures or stacked PCB assemblies where airflow is restricted.
Can SMCJ43CAHE3/57T replace older SMCJ43CA parts with different suffixes?
SMCJ43CAHE3/57T is a direct functional replacement for any SMCJ43CA variant sharing the same VWM and PPPM ratings, provided the HE3 suffix aligns with required AEC-Q101 and RoHS compliance. The "/57T" denotes 7-inch tape-and-reel packaging (850 units), so mechanical compatibility is guaranteed - but verify that legacy designs do not rely on non-AEC-Q101 grade specifications or alternate termination finishes.
SMCJ43CAHE3/57T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMCJ43CAHE3/57T FAQ
1.How can I place an order for SMCJ43CAHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ43CAHE3/57T 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 SMCJ43CAHE3/57T reliable?
The price and inventory of SMCJ43CAHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ43CAHE3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ43CAHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ43CAHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ43CAHE3/57T?
SMCJ43CAHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ43CAHE3/57T 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 SMCJ43CAHE3/57T?
For technical support, including SMCJ43CAHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ43CAHE3/57T requirements.
6.How does Aetrix verify that SMCJ43CAHE3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ43CAHE3/57T 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 SMCJ43CAHE3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ43CAHE3/57T?
All SMCJ43CAHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ43CAHE3/57T, 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 SMCJ43CAHE3/57T part is unused and in its original packaging.
Return procedure for SMCJ43CAHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ43CAHE3/57T Tags
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