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Vishay General Semiconductor - Diodes Division SMCJ43CHE3/57T
- Part No.:
- SMCJ43CHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ43CHE3/57T.pdf
- Description:
- TVS DIODE 43VWM 76.7VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,817
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Product details
Overview
SMCJ43CHE3/57T from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-214AB (SMCJ) package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 43 V standoff voltage (VWM), 47.8–52.8 V breakdown range at 1 mA, 69.4 V clamping voltage at 21.6 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform. It is AEC-Q101 qualified and RoHS compliant, suited for automotive power supply input protection.
For engineers reviewing the SMCJ43CHE3/57T datasheet, SMCJ43CHE3/57T pinout, SMCJ43CHE3/57T application, or SMCJ43CHE3/57T equivalent, key selection criteria include clamping voltage margin relative to protected IC's absolute maximum rating, junction temperature derating above 25 °C, surge current capability under real-world inductive load switching, and AEC-Q101 qualification status for automotive deployment.
Technical Context
The SMCJ43CHE3/57T operates as a silicon avalanche diode that enters controlled breakdown when reverse voltage exceeds its VBR threshold, diverting transient energy away from downstream circuitry. Its low incremental surge resistance and fast response time (<1 ns) enable effective suppression of ESD, lightning-induced surges, and inductive switching spikes on 12 V and 24 V automotive systems.
It is rated for continuous operation from –55 °C to +150 °C junction temperature, with thermal resistance of 75 °C/W (junction-to-ambient, on recommended 8.0 mm × 8.0 mm copper pads) and 15 °C/W (junction-to-lead). The device uses glass-passivated chip junction construction and matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - Maximum continuous reverse operating voltage before leakage exceeds 1 µA; sets upper limit for protected line's nominal DC voltage. |
| VBR min/max | 47.8 V / 52.8 V at IT = 1 mA - Confirmed breakdown range ensures reliable turn-on without premature conduction during normal operation. |
| VC @ IPPM | 69.4 V at 21.6 A - Clamped voltage during 10/1000 µs surge defines worst-case stress on downstream components. |
| PPPM | 1500 W - Peak pulse power handling capacity determines survivability against standardized surge events (e.g., ISO 7637-2 Pulse 1/2a/5a). |
| TJ max | +150 °C - Maximum junction temperature enables use in under-hood automotive environments with high ambient thermal loads. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
Pinout & Package
Package: DO-214AB (SMCJ), surface-mount, low-profile, bi-directional-capable case with cathode band marking for unidirectional polarity. Molding compound meets UL 94 V-0; terminals are matte tin plated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional configuration; conducts during forward surge or bias conditions. |
| Cathode (banded end) | Reverse-blocking / avalanche terminal | Connected to protected line (e.g., 12 V rail); blocks 43 V in steady state and avalanches above ~48 V to clamp transients. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable, repeatable avalanche characteristics and long-term reliability under repeated surge stress. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients, improving clamping precision and system-level EMI margin. |
| MSL Level 1 (J-STD-020) | Allows unlimited floor life and reflow up to 260 °C peak, compatible with standard SMT assembly processes without dry-pack requirements. |
| JESD 201 Class 2 whisker resistance | HE3 suffix confirms mitigation of tin whisker growth under thermal cycling and humidity, critical for automotive long-life applications. |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump (ISO 7637-2 Pulse 5a) and alternator ripple-induced surges. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor, acting as last-line clamping element before LDO or DC-DC converter. Use Value: Limits transient voltage to ≤69.4 V, well below typical 75 V absolute max rating of automotive PMICs, preventing latch-up or permanent damage. | Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events in factory automation systems. IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional diode used across differential pair or single-ended signal line to ground, suppressing ±8 kV contact ESD per IEC 61000-4-2. Use Value: Sub-1 ns response ensures clamping occurs before sensitive op-amp inputs saturate or fail, preserving signal integrity and measurement accuracy. |
| Telecom DC Power Feeds | Consumer Device USB Port Protection |
Use Scenario: Safeguarding 48 V PoE-powered equipment front-end from induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary TVS on DC input stage, coordinated with upstream MOV and downstream filtering to meet IEC 61000-4-5 Level 3 (2 kV/1 kA) requirements. Use Value: 1500 W PPPM rating supports multi-event surge endurance, while 43 V VWM aligns with 48 V nominal telecom supply tolerances. | Use Scenario: Adding secondary overvoltage protection on USB VBUS line in portable docking stations exposed to hot-plug transients. IC Role / Device Role / Timing Role: Standoff-rated TVS placed after primary fuse and upstream of USB controller, providing fast clamping without affecting 5 V regulation. Use Value: 69.4 V clamping avoids interference with 5 V logic thresholds while absorbing >100 A surge peaks common in connector mating events. |
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-E3/61 | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher RθJA (110 °C/W), same VWM/VBR/VC specs. | Not suitable for high-energy automotive load dump; limited to low-power consumer or industrial signal lines. | Select only if board space is constrained and surge energy is <200 mJ; verify thermal margin with actual pad layout. |
| 1.5KE43A | Through-hole TO-218 package, 1500 W PPPM, same VWM/VBR/VC, but no AEC-Q101 qualification or MSL 1 rating. | Acceptable for non-automotive industrial mains-powered equipment where reflow compatibility and automotive qualification are not required. | Choose for legacy through-hole designs or cost-sensitive non-automotive applications; avoid in new SMT automotive designs. |
Compared with SMAJ43A-E3/61 and 1.5KE43A, the SMCJ43CHE3/57T delivers identical electrical clamping performance in a surface-mount AEC-Q101-qualified package with superior thermal dissipation (RθJA = 75 °C/W vs. 110 °C/W) and full reflow process support-making it the preferred choice for next-generation automotive and high-reliability industrial PCBs.
Availability
SMCJ43CHE3/57T is available at Aetrix Electronics and suitable for automotive power input protection, industrial sensor interface hardening, and telecom DC feed surge suppression requiring stable component supply across extended production lifecycles.
Supply support for SMCJ43CHE3/57T 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 application-specific optimization.
The SMCJ series belongs to Vishay's TRANSZORB® TVS portfolio, engineered specifically for high-energy transient suppression in automotive, industrial, and telecom infrastructure where AEC-Q101 compliance, low clamping voltage, and robust surge endurance are mandatory.
FAQ
What is the clamping voltage of the SMCJ43CHE3/57T and how is it measured?
The SMCJ43CHE3/57T 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 surge waveform. This value represents the worst-case voltage seen by downstream circuitry during a transient event and is guaranteed per Vishay's datasheet test conditions with proper PCB thermal design (8.0 mm × 8.0 mm copper pads per terminal).
Is the SMCJ43CHE3/57T suitable for automotive applications?
Yes, the SMCJ43CHE3/57T is explicitly AEC-Q101 qualified, with validation across temperature cycling, high-temperature reverse bias, and ESD testing per automotive reliability standards. Its DO-214AB package, MSL Level 1 rating, and JESD 201 Class 2 whisker resistance make it appropriate for under-hood and body-control module deployments where the SMCJ43CHE3/57T provides certified surge protection.
What does the "HE3/57T" suffix indicate in SMCJ43CHE3/57T?
The "HE3" suffix denotes RoHS-compliant construction with AEC-Q101 qualification and JESD 201 Class 2 whisker resistance; "57T" specifies packaging in 7-inch plastic tape-and-reel format with 850 units per reel. This distinguishes it from commercial-grade "E3" variants and larger "9AT" reels, ensuring traceability and process compatibility for automotive SMT lines using the SMCJ43CHE3/57T.
How does the SMCJ43CHE3/57T differ from bi-directional versions like SMCJ43CA?
The SMCJ43CHE3/57T is unidirectional, featuring a cathode band and blocking conduction in forward bias-ideal for DC rail protection. In contrast, SMCJ43CA is bi-directional with no polarity marking and symmetrical clamping in both directions, suited for AC lines or differential signals. The SMCJ43CHE3/57T cannot replace SMCJ43CA in AC-coupled applications without circuit redesign.
What is the thermal resistance of the SMCJ43CHE3/57T and how does it affect layout?
The SMCJ43CHE3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on minimum recommended 8.0 mm × 8.0 mm copper pads per terminal. To maintain TJ ≤ 150 °C under sustained 6.5 W power dissipation, PCB layout must allocate sufficient copper area and consider airflow-underscoring why the SMCJ43CHE3/57T requires verified thermal design, not just electrical matching.
SMCJ43CHE3/57T 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:
- -
- Bidirectional Channels:
- 1
- 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)
SMCJ43CHE3/57T FAQ
1.How can I place an order for SMCJ43CHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ43CHE3/57T 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 SMCJ43CHE3/57T reliable?
The price and inventory of SMCJ43CHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ43CHE3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ43CHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ43CHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ43CHE3/57T?
SMCJ43CHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ43CHE3/57T 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 SMCJ43CHE3/57T?
For technical support, including SMCJ43CHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ43CHE3/57T requirements.
6.How does Aetrix verify that SMCJ43CHE3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ43CHE3/57T 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 SMCJ43CHE3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ43CHE3/57T?
All SMCJ43CHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ43CHE3/57T, 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 SMCJ43CHE3/57T part is unused and in its original packaging.
Return procedure for SMCJ43CHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ43CHE3/57T Tags
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