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Vishay General Semiconductor - Diodes Division SMCJ28CA-M3/57T
- Part No.:
- SMCJ28CA-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ28CA-M3/57T.pdf
- Description:
- TVS DIODE 28VWM 45.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,855
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Product details
Overview
SMCJ28CA-M3/57T from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for clamping voltage transients up to 1500 W peak pulse power with 45.4 V maximum clamping voltage at 33.0 A peak pulse current and 28 V stand-off voltage. It operates across -55 °C to +150 °C junction temperature and features low incremental surge resistance and fast response time for protecting MOSFETs, ICs, and sensor signal lines.
For engineers reviewing the SMCJ28CA-M3/57T datasheet, SMCJ28CA-M3/57T pinout, SMCJ28CA-M3/57T application, or SMCJ28CA-M3/57T equivalent, key selection criteria include bidirectional clamping capability, 28 V stand-off voltage, 45.4 V clamping voltage at rated surge current, halogen-free RoHS-compliant construction, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
The SMCJ28CA-M3/57T implements a glass-passivated silicon avalanche junction optimized for transient suppression under 10/1000 μs waveform conditions. Its bidirectional architecture enables symmetrical clamping in both polarities without polarity marking, supporting protection of AC-coupled or differential signal paths.
Thermal design relies on RθJL = 15 °C/W junction-to-lead resistance and requires mounting on minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal to sustain 1500 W peak pulse power. It meets MSL level 1 per J-STD-020 with 260 °C reflow peak temperature tolerance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VWM) | 28 V - Maximum continuous reverse operating voltage before clamping begins |
| Breakdown Voltage (VBR) | 31.1 V to 34.4 V at 1 mA - Confirmed avalanche initiation range under DC test conditions |
| Clamping Voltage (VC) | 45.4 V at 33.0 A IPPM - Peak voltage seen by protected circuit during 10/1000 μs transient |
| Peak Pulse Power (PPPM) | 1500 W - Maximum transient energy absorption capability under standardized waveform |
| Operating Temperature | -55 °C to +150 °C - Validated junction temperature range for industrial and automotive environments |
| Package | SMC (DO-214AB) - Surface-mount outline with 7.75 mm × 6.22 mm body and 2.62 mm lead spacing |
| Construction | Halogen-free, RoHS-compliant - Meets JEDEC JESD201 Class 2 whisker resistance and UL 94 V-0 flammability |
Pinout & Package
SMCJ28CA-M3/57T uses the SMC (DO-214AB) package: a surface-mount, molded plastic case with two coplanar leads, no polarity marking (bidirectional), and matte tin-plated terminals solderable per J-STD-002 and JESD22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional avalanche junction terminals | No functional distinction - either terminal serves as anode or cathode depending on transient polarity; no band marking required |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated chip junction | Enables stable, repeatable avalanche breakdown with low leakage and high reliability over temperature and life cycles |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients, improving protection margin for downstream ICs |
| MSL Level 1 rating | Allows unlimited floor life and single-reflow processing at 260 °C peak without moisture-induced damage |
| 1500 W peak pulse power | Supports robust protection against IEC 61000-4-5 Level 4 surges (4 kV line-earth, 2 kV line-line) in industrial interfaces |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load-dump and inductive switching transients in 12 V/24 V vehicle systems. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector entry point to limit transient excursions below IC absolute maximum ratings. Use Value: Maintains signal integrity during ISO 7637-2 Pulse 1/2a/5a events while enabling use of cost-sensitive 30 V-rated interface ICs. | Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to relay coil flyback, motor drive noise, and field wiring ESD. IC Role / Device Role / Timing Role: Primary front-end transient suppressor on 24 V DC input channels, coordinated with series impedance and filtering. Use Value: Prevents false triggering and latch-up in microcontroller GPIOs by clamping transients to ≤45.4 V within nanoseconds. |
| Telecom Line Interface | Consumer Power Adapter Output |
Use Scenario: Shielding Ethernet PHYs, DSL line drivers, and PoE injectors from lightning-induced surges on twisted-pair cabling. IC Role / Device Role / Timing Role: Secondary-level protector after gas discharge tube (GDT) or polymer PTC, absorbing residual energy in differential mode. Use Value: Achieves <100 ps response with sub-50 V clamping to preserve signal eye diagram integrity on 100BASE-TX and higher links. | Use Scenario: Securing USB-C PD and 5–20 V DC output rails in wall adapters against output short-circuit transients and capacitor discharge spikes. IC Role / Device Role / Timing Role: Output-side TVS placed after DC-DC converter to prevent overvoltage damage to connected devices during fault recovery. Use Value: Limits output rail excursion to 45.4 V during 1500 W surge, avoiding catastrophic failure of downstream USB controller ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ28CA-E3/57T | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher clamping voltage (48.4 V at 8.3 A) | Suitable for lower-energy transients; limited to PCBs with tighter space constraints and reduced surge immunity requirements | Select when board area is constrained and IEC 61000-4-5 Level 2 compliance suffices |
| SMCJ28A-M3/57T | Unidirectional variant with cathode band marking; identical VWM, VC, and PPPM but asymmetric conduction | Required only where DC bias or polarity-specific clamping is needed (e.g., single-supply power rails) | Choose only if circuit topology mandates unidirectional blocking; otherwise SMCJ28CA-M3/57T offers broader signal-path flexibility |
Compared with SMAJ28CA-E3/57T and SMCJ28A-M3/57T, the SMCJ28CA-M3/57T delivers 3.75× higher surge power handling in the same SMC footprint and enables polarity-agnostic protection-critical for AC-coupled data lines and dual-rail sensor interfaces where layout symmetry matters.
Availability
SMCJ28CA-M3/57T is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, telecom line interfaces, and consumer power adapter designs requiring stable component supply, halogen-free compliance, and AEC-Q101-qualified alternatives.
Supply support for SMCJ28CA-M3/57T 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, thermal performance, and application-specific validation.
The SMCJ series targets high-energy transient suppression in harsh environments, engineered for automotive, industrial, and telecom infrastructure where sustained 1500 W surge capability and extended temperature operation are mandatory.
FAQ
What is the clamping voltage of the SMCJ28CA-M3/57T under standard test conditions?
The SMCJ28CA-M3/57T has a maximum clamping voltage (VC) of 45.4 V at 33.0 A peak pulse current (IPPM) using the 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and reflects the upper limit of voltage imposed on protected circuitry during a defined transient event. The SMCJ28CA-M3/57T maintains this clamping performance across its full operating temperature range.
Is the SMCJ28CA-M3/57T suitable for automotive applications?
Yes - the SMCJ28CA-M3/57T is halogen-free and RoHS-compliant, and its base family (SMCJxxCA) supports AEC-Q101 qualification via HM3 suffix variants. While the -M3/57T suffix itself denotes commercial-grade halogen-free construction, it shares identical electrical, thermal, and mechanical specifications with AEC-Q101-qualified versions and is widely deployed in automotive sensor and body-control modules meeting ISO 7637-2 requirements.
How does the bidirectional design of the SMCJ28CA-M3/57T affect PCB layout?
The SMCJ28CA-M3/57T has no polarity marking and functions identically in either orientation, simplifying PCB layout by eliminating orientation checks during automated placement. This symmetry allows direct integration into differential signal paths (e.g., RS-485, CAN, Ethernet) without concern for anode/cathode alignment. The SMCJ28CA-M3/57T requires only two 8.0 mm × 8.0 mm copper pads - one per terminal - with no thermal pad or ground plane restrictions beyond standard SMC guidelines.
What is the thermal resistance profile of the SMCJ28CA-M3/57T?
The SMCJ28CA-M3/57T has a typical junction-to-lead thermal resistance (RθJL) of 15 °C/W and junction-to-ambient resistance (RθJA) of 75 °C/W when mounted on minimum recommended 0.31" × 0.31" copper pads. These values enable reliable operation at 6.5 W steady-state dissipation up to +50 °C ambient and support short-duration 1500 W surge events without exceeding the 150 °C maximum junction temperature, provided PCB copper area meets spec.
Does the SMCJ28CA-M3/57T meet industry surge immunity standards?
Yes - the SMCJ28CA-M3/57T's 1500 W peak pulse power rating and 45.4 V clamping voltage align with IEC 61000-4-5 Level 4 (4 kV line-earth, 2 kV line-line) when used with appropriate series impedance. Its 10/1000 μs waveform response and low incremental resistance make it suitable for protecting circuits against lightning-induced surges, inductive switching transients, and ESD events per IEC 61000-4-2, especially when combined with upstream GDTs or polymer PTCs in multi-stage architectures.
SMCJ28CA-M3/57T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 28V
- Voltage - Breakdown (Min):
- 31.1V
- Voltage - Clamping (Max) @ Ipp:
- 45.4V
- Current - Peak Pulse (10/1000µs):
- 33A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMCJ28CA-M3/57T FAQ
1.How can I place an order for SMCJ28CA-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ28CA-M3/57T 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 SMCJ28CA-M3/57T reliable?
The price and inventory of SMCJ28CA-M3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ28CA-M3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ28CA-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ28CA-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ28CA-M3/57T?
SMCJ28CA-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ28CA-M3/57T 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 SMCJ28CA-M3/57T?
For technical support, including SMCJ28CA-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ28CA-M3/57T requirements.
6.How does Aetrix verify that SMCJ28CA-M3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ28CA-M3/57T 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 SMCJ28CA-M3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ28CA-M3/57T?
All SMCJ28CA-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ28CA-M3/57T, 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 SMCJ28CA-M3/57T part is unused and in its original packaging.
Return procedure for SMCJ28CA-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ28CA-M3/57T Tags
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