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Vishay General Semiconductor - Diodes Division SMCJ28CA-E3/57T
- Part No.:
- SMCJ28CA-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ28CA-E3/57T.pdf
- Description:
- TVS DIODE 28VWM 45.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:1,957
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Product details
Overview
SMCJ28CA-E3/57T 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 28 V standoff voltage (VWM), 45.4 V maximum clamping voltage (VC) at 33.0 A peak pulse current (IPPM), and 1500 W peak pulse power (10/1000 µs waveform), commonly deployed on automotive sensor signal lines and industrial I/O interfaces.
For engineers reviewing the SMCJ28CA-E3/57T datasheet, SMCJ28CA-E3/57T pinout, SMCJ28CA-E3/57T application, or SMCJ28CA-E3/57T equivalent, key selection criteria include bidirectional clamping symmetry, low incremental surge resistance, AEC-Q101 qualification eligibility, and compatibility with automated SMT placement on 8 mm × 8 mm copper pads.
Technical Context
The SMCJ28CA-E3/57T operates as a silicon avalanche diode with glass-passivated junction, delivering symmetrical clamping in both polarities due to its bidirectional construction. Its breakdown voltage (VBR) is specified between 31.1 V and 34.4 V at 1.0 mA test current, with temperature coefficient of 0.098 %/°C - enabling stable transient suppression across -55 °C to +150 °C operating junction range.
It meets J-STD-020 MSL Level 1 moisture sensitivity and supports reflow up to 260 °C peak. With 75 °C/W junction-to-ambient thermal resistance and 15 °C/W junction-to-lead, it relies on PCB copper pad area (0.31" × 0.31") for effective power dissipation during transient events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28 V - Maximum continuous reverse working voltage before clamping initiates |
| VBR min/max | 31.1 V / 34.4 V at 1.0 mA - Ensures reliable avalanche conduction onset within defined tolerance |
| VC @ IPPM | 45.4 V at 33.0 A - Limits protected circuit voltage during 10/1000 µs transients |
| PPPM | 1500 W - Sustains high-energy surges such as ISO 7637-2 Pulse 1/2a/5a in automotive systems |
| IPPM | 33.0 A - Peak surge current capability under standardized 10/1000 µs waveform |
| TJ max | +150 °C - Enables operation in under-hood automotive and industrial environments |
| Package | SMC (DO-214AB) - Surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height |
Pinout & Package
SMCJ28CA-E3/57T uses the SMC (DO-214AB) package: a surface-mount, bidirectional device with no polarity marking; both terminals are electrically symmetric and interchangeable. The case is molded with UL 94 V-0 rated compound, matte tin-plated leads compliant with J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | Conducts during negative-going transients; connects to protected line or ground return path |
| Cathode | Transient current entry (positive polarity) | Conducts during positive-going transients; connects to protected line or ground return path |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| 1500 W peak pulse power | Withstands high-energy transients like load dump spikes and ESD-induced surges in automotive ECUs |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes voltage overshoot during clamping, reducing stress on downstream ICs like CAN transceivers |
| AEC-Q101 qualification path | Base P/NHE3 suffix variants support automotive-grade reliability; E3 suffix indicates RoHS-compliant commercial grade |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow without baking, simplifying SMT manufacturing |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine control modules exposed to ISO 7637-2 Pulse 5a load dump. IC Role / Device Role / Timing Role: Bidirectional TVS clamps both positive and negative transients on sensor supply or signal outputs. Use Value: Prevents latch-up or permanent damage to 12-bit ADC front-ends by limiting voltage to ≤45.4 V during 1500 W surges. | Use Scenario: Shielding RS-485 transceiver data lines in factory automation PLCs from EFT and surge events per IEC 61000-4-4/5. IC Role / Device Role / Timing Role: Fast-response (sub-nanosecond) avalanche diode shunts transient energy away from transceiver pins. Use Value: Maintains signal integrity by clamping within 45.4 V while adding <1 pF capacitance - negligible impact on 10 Mbps data rates. |
| Consumer Power Adapter Input | Telecom DC Power Feeds |
Use Scenario: Safeguarding primary-side controller ICs in universal input AC/DC adapters against lightning-induced surges on L/N lines. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbs differential-mode surges before they reach bridge rectifier and PWM controller. Use Value: Provides 28 V working margin above 24 V nominal DC bus, ensuring no false triggering during normal operation. | Use Scenario: Protecting PoE-powered equipment (e.g., IP cameras) from induced surges on 48 V DC feed lines in outdoor installations. IC Role / Device Role / Timing Role: Bidirectional clamp handles polarity-reversal risks during hot-swap or fault conditions on DC distribution rails. Use Value: Delivers 1500 W surge handling without derating at +85 °C ambient, supporting extended outdoor deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC28CA | Lower PPPM (600 W), same VWM/VC, smaller SMA package | Limited to lower-energy transients; unsuitable for automotive load dump | Select when board space is constrained and surge energy is ≤600 W |
| 1.5KE28CA | Through-hole DO-201 package, identical electrical specs, higher RθJA (100 °C/W) | Requires wave soldering; less suitable for high-density SMT designs | Choose for legacy through-hole assembly or prototyping with breadboard compatibility |
Compared with SAC28CA and 1.5KE28CA, the SMCJ28CA-E3/57T delivers superior surge robustness in compact SMT form factor, enabling automotive-grade protection without layout compromise or thermal derating penalties.
Availability
SMCJ28CA-E3/57T is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O interface hardening, and telecom DC power feed applications requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMCJ28CA-E3/57T 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMCJ series is engineered for high-power transient suppression in harsh environments, targeting automotive, industrial, and telecom systems where failure resilience and AEC-Q101 compliance are critical design requirements.
FAQ
What does the "CA" suffix indicate in SMCJ28CA-E3/57T?
The "CA" suffix denotes a bidirectional configuration: the SMCJ28CA-E3/57T provides symmetrical clamping for both positive and negative voltage transients, unlike unidirectional "A" variants that clamp only one polarity. This eliminates polarity marking on PCBs and simplifies layout for AC-coupled or floating signal paths.
Is SMCJ28CA-E3/57T qualified to AEC-Q101?
The SMCJ28CA-E3/57T carries the E3 suffix, indicating RoHS-compliant commercial grade. AEC-Q101 qualification requires the HE3 suffix (e.g., SMCJ28CAHE3_A); the E3 variant itself is not AEC-Q101 qualified but shares identical die and package construction, enabling qualification-ready design-in.
What is the maximum clamping voltage of SMCJ28CA-E3/57T and at what current?
The SMCJ28CA-E3/57T has a maximum clamping voltage (VC) of 45.4 V at 33.0 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuits during surge events.
Can SMCJ28CA-E3/57T be used in place of a unidirectional TVS like SMCJ28A-E3/57T?
No - the SMCJ28CA-E3/57T is bidirectional and lacks cathode marking, while SMCJ28A-E3/57T is unidirectional with explicit polarity. Substituting them requires verifying circuit topology: bidirectional use is mandatory for AC signals or floating grounds; unidirectional is required for DC-biased lines where reverse leakage must be minimized.
What PCB pad layout is recommended for optimal thermal performance of SMCJ28CA-E3/57T?
Vishay specifies a minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pad area per terminal for SMCJ28CA-E3/57T to achieve rated 1500 W pulse power. Using smaller pads reduces surge capability significantly; thermal vias to inner ground planes further improve heat dissipation in high-reliability designs.
SMCJ28CA-E3/57T 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 (SMCJ)
SMCJ28CA-E3/57T FAQ
1.How can I place an order for SMCJ28CA-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ28CA-E3/57T 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-E3/57T reliable?
The price and inventory of SMCJ28CA-E3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ28CA-E3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ28CA-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ28CA-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ28CA-E3/57T?
SMCJ28CA-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ28CA-E3/57T 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-E3/57T?
For technical support, including SMCJ28CA-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ28CA-E3/57T requirements.
6.How does Aetrix verify that SMCJ28CA-E3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ28CA-E3/57T 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-E3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ28CA-E3/57T?
All SMCJ28CA-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ28CA-E3/57T, 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-E3/57T part is unused and in its original packaging.
Return procedure for SMCJ28CA-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ28CA-E3/57T Tags
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