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Vishay General Semiconductor - Diodes Division SMCJ12CHE3/57T
- Part No.:
- SMCJ12CHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ12CHE3/57T.pdf
- Description:
- TVS DIODE 12VWM 22VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,345
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Product details
Overview
SMCJ12CHE3/57T 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 12 V stand-off voltage (VWM), 19.9 V clamping voltage (VC) at 75.4 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with AEC-Q101 qualification for automotive reliability.
For engineers reviewing the SMCJ12CHE3/57T datasheet, SMCJ12CHE3/57T pinout, SMCJ12CHE3/57T application, or SMCJ12CHE3/57T equivalent, this device is selected for high-energy transient suppression on DC power rails and signal lines where fast response (<1 ns), low clamping ratio (VC/VWM ≈ 1.66), and stable junction temperature up to +150 °C are required.
Technical Context
This TVS diode operates as a silicon avalanche clamp, triggered when reverse voltage exceeds its breakdown threshold (VBR min = 13.3 V, max = 14.7 V at 1 mA). Its glass-passivated junction ensures stable leakage performance (<5 μA at VWM) and long-term reliability under repetitive surge stress.
The device complies with IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and ISO 7637-2 (automotive transients), delivering consistent clamping behavior across -55 °C to +150 °C operating range with thermal resistance RθJA = 75 °C/W on standard 8 mm × 8 mm copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 13.3 V / 14.7 V at 1 mA - Ensures reliable turn-on margin above VWM with tight tolerance |
| VC @ IPPM | 19.9 V at 75.4 A - Limits downstream voltage during 10/1000 µs surge, protecting 15–20 V-rated ICs |
| PPPM | 1500 W - Withstands high-energy transients such as load dump or inductive switching spikes |
| ID @ VWM | <5 μA - Minimizes standby power loss and avoids false triggering in low-current circuits |
| TJ max. | +150 °C - Enables operation in under-hood automotive environments and industrial enclosures |
| Package | DO-214AB (SMCJ) - Surface-mount footprint compatible with automated assembly and meets UL 94 V-0 |
Pinout & Package
DO-214AB (SMCJ) package: molded plastic case with J-bend leads; cathode indicated by band on one end; matte tin-plated terminals compliant with J-STD-002 solderability and JESD 201 class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal (for uni-directional operation) | Connected to ground or lower-potential rail; enables clamping only during reverse overvoltage events |
| Cathode | Reverse-biased terminal (marked with band) | Connected to protected line (e.g., 12 V supply); avalanche breakdown occurs here during transients |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics |
| Low incremental surge resistance | Enables tighter clamping (VC/VBR ≈ 1.35) and reduced energy dissipation in the protected circuit |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns |
| Glass-passivated junction | Improves long-term stability of VBR and leakage under thermal cycling and humidity stress |
| UL 94 V-0 molding compound | Meets flammability requirements for safety-critical industrial and transportation systems |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground to clamp surges before they reach LDOs and microcontrollers. Use Value: Clamps 1500 W transients to ≤19.9 V, preventing latch-up or gate oxide damage in downstream 16 V-tolerant logic. | Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events in factory automation. IC Role / Device Role / Timing Role: TVS mounted at connector entry point to shunt fast transients (<1 ns rise time) away from precision ADC front-ends. Use Value: Sub-5 μA leakage preserves signal integrity on high-impedance sensor lines; DO-214AB footprint allows placement within 2 mm of I/O connector. |
| Telecom DC Power Input Protection | Consumer Device USB/DC Jack Protection |
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: Primary surge clamp on main DC bus, coordinated with upstream fuse and downstream π-filter. Use Value: 1500 W rating handles multi-kV lightning-induced surges; AEC-Q101 qualification supports extended field life in outdoor deployments. | Use Scenario: Preventing ESD damage to USB-C or barrel jack inputs in portable audio devices and smart home hubs. IC Role / Device Role / Timing Role: First-line defense at board edge, placed before EMI filter and input capacitor. Use Value: Fast response (<1 ns) limits voltage overshoot to <20 V during ±8 kV contact discharge (IEC 61000-4-2), preserving USB PHY integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ12A-E3/52T | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher VC (20.1 V at 24.7 A) | Suitable for space-constrained consumer designs with lower surge exposure | Select when board area is critical and peak surge energy remains below 400 W |
| 1.5KE12A | Through-hole TO-218 package, same VWM/VC specs but higher RθJA (60 °C/W), no AEC-Q101 | Used in legacy industrial power supplies where reworkability and high-power derating are prioritized | Choose for manual assembly or high-temperature ambient designs requiring >100 °C junction margin |
Compared with SMCJ12CHE3/57T, SMAJ12A-E3/52T offers smaller footprint but reduced surge handling, while 1.5KE12A provides through-hole robustness without automotive qualification-making SMCJ12CHE3/57T optimal for new AEC-Q101-compliant surface-mount designs needing full 1500 W capability.
Availability
SMCJ12CHE3/57T is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, telecom power inputs, and consumer DC jack protection requiring stable component supply and AEC-Q101 compliance.
Supply support for SMCJ12CHE3/57T 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, and protection devices 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 applications demanding AEC-Q101 qualification, UL recognition, and repeatable clamping performance.
FAQ
What is the clamping voltage of the SMCJ12CHE3/57T under maximum surge conditions?
The SMCJ12CHE3/57T has a maximum clamping voltage (VC) of 19.9 V at 75.4 A peak pulse current (IPPM), measured using the standardized 10/1000 µs waveform. This value ensures protected circuits remain below critical thresholds during high-energy transients, and it is guaranteed across the full operating temperature range of -55 °C to +150 °C. The SMCJ12CHE3/57T maintains this clamping performance due to its low incremental surge resistance and stable avalanche characteristics.
Is the SMCJ12CHE3/57T suitable for automotive applications?
Yes, the SMCJ12CHE3/57T is AEC-Q101 qualified and specifically designed for automotive use, including engine control units, body electronics, and infotainment power supplies. Its DO-214AB package meets MSL Level 1 for lead-free reflow, and its thermal performance (RθJA = 75 °C/W) supports operation in under-hood environments. The SMCJ12CHE3/57T also complies with ISO 7637-2 for load dump immunity and is UL recognized under file E136766.
How does the SMCJ12CHE3/57T differ from bi-directional variants like SMCJ12CA?
The SMCJ12CHE3/57T is unidirectional, meaning it conducts only in reverse bias and requires correct polarity installation (cathode toward protected line). In contrast, SMCJ12CA is bi-directional with symmetrical clamping in both directions and no polarity marking. The SMCJ12CHE3/57T offers tighter leakage (<5 μA) and is preferred for DC power rail protection, whereas SMCJ12CA suits AC-coupled or floating signal lines. Both share identical VWM, VC, and PPPM ratings.
What is the maximum operating temperature for the SMCJ12CHE3/57T?
The SMCJ12CHE3/57T has a maximum junction temperature (TJ max.) of +150 °C and an operating junction/storage temperature range of -55 °C to +150 °C. This rating is validated per AEC-Q101 stress testing and enables deployment in high-ambient environments such as automotive engine compartments or industrial motor drives. Derating curves in the datasheet confirm usable power dissipation down to 50 % of rated PPPM at +125 °C ambient when mounted on recommended 8 mm × 8 mm copper pads.
Does the SMCJ12CHE3/57T require a heatsink for standard operation?
No external heatsink is required for the SMCJ12CHE3/57T under typical transient conditions, as its 1500 W PPPM rating assumes mounting on minimum recommended 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. The device's RθJL of 15 °C/W enables efficient heat transfer to PCB copper, and its RθJA of 75 °C/W is sufficient for short-duration surges. Continuous power dissipation (PD = 6.5 W) is not intended; the SMCJ12CHE3/57T is rated for non-repetitive pulses only.
SMCJ12CHE3/57T 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):
- 12V
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 22V
- Current - Peak Pulse (10/1000µs):
- 68.2A
- 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)
SMCJ12CHE3/57T FAQ
1.How can I place an order for SMCJ12CHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ12CHE3/57T 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 SMCJ12CHE3/57T reliable?
The price and inventory of SMCJ12CHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ12CHE3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ12CHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ12CHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ12CHE3/57T?
SMCJ12CHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ12CHE3/57T 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 SMCJ12CHE3/57T?
For technical support, including SMCJ12CHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ12CHE3/57T requirements.
6.How does Aetrix verify that SMCJ12CHE3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ12CHE3/57T 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 SMCJ12CHE3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ12CHE3/57T?
All SMCJ12CHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ12CHE3/57T, 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 SMCJ12CHE3/57T part is unused and in its original packaging.
Return procedure for SMCJ12CHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ12CHE3/57T Tags
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