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Vishay General Semiconductor - Diodes Division SMCG28CA-E3/57T
- Part No.:
- SMCG28CA-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG28CA-E3/57T.pdf
- Description:
- TVS DIODE 28VWM 45.4VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,257
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Product details
Overview
SMCG28CA-E3/57T from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in the SMCG (DO-215AB) surface-mount package, with a standoff voltage (VWM) of 28 V, breakdown voltage (VBR) of 31.1–34.4 V at 1 mA, peak pulse power rating (PPPM) of 1500 W, clamping voltage (VC) of 45.4 V at 33.0 A, and AEC-Q101 qualification for automotive reliability. It protects signal lines and power rails in sensor interfaces and ECU inputs against inductive switching transients.
For engineers reviewing the SMCG28CA-E3/57T datasheet, SMCG28CA-E3/57T pinout, SMCG28CA-E3/57T application, or SMCG28CA-E3/57T equivalent, key selection criteria include bidirectional clamping capability, 1500 W 10/1000 µs surge rating, DO-215AB thermal performance (RθJA = 75 °C/W), and AEC-Q101 qualification for under-hood automotive use.
Technical Context
This device operates as a voltage-clamped crowbar during transient events: when reverse voltage exceeds VBR (31.1–34.4 V), it avalanches to limit voltage across protected circuitry. Its bidirectional symmetry enables protection on AC-coupled or floating lines without polarity concerns.
Designed for surface-mount automated assembly, the SMCG28CA-E3/57T uses glass-passivated junction technology and meets MSL Level 1 per J-STD-020 with 260 °C lead-free reflow compatibility. Its low incremental surge resistance ensures minimal voltage overshoot during fast 10/1000 µs transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 31.1 V / 34.4 V at 1 mA - Ensures reliable avalanche initiation within defined tolerance band |
| VC @ IPPM | 45.4 V at 33.0 A - Clamped voltage during full 1500 W surge, limiting stress on downstream ICs |
| PPPM | 1500 W (10/1000 µs) - Sustains high-energy transients common in automotive load-dump and inductive kick scenarios |
| ID @ VWM | 1.0 µA - Ultra-low leakage preserves signal integrity and battery life in always-on circuits |
| TJ max | +150 °C - Supports operation in engine compartment environments with extended thermal margin |
| AEC-Q101 | Qualified - Validated for automotive electronics per stress test requirements including HTOL, TC, and HTRB |
Pinout & Package
Package: SMCG (DO-215AB) - Low-profile, dual-leaded surface-mount case with 8.0 mm × 8.0 mm copper pad layout recommendation for optimal thermal dissipation and surge current handling. Matte tin-plated leads meet J-STD-002 solderability and JESD22-B102 whisker resistance Class 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current return path (bidirectional) | Carries surge current in either polarity; symmetric with cathode for AC line protection |
| Cathode | Transient current return path (bidirectional) | Carries surge current in either polarity; no marking on bidirectional variants like SMCG28CA-E3/57T |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable, repeatable avalanche characteristics over lifetime and temperature cycling |
| MSL Level 1 rating | Allows unlimited floor life and single-reflow processing at 260 °C peak without moisture-related failure |
| UL 94 V-0 molding compound | Meets flammability safety requirements for enclosed automotive and industrial enclosures |
| Low RθJL (15 °C/W) | Supports efficient heat transfer from junction to PCB pads, critical for sustaining repetitive surges |
| Matte tin plating | Ensures robust solder joint formation and long-term intermetallic stability under thermal cycling |
Applications
| Automotive Sensor Interface | Industrial CAN Bus Line |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine control modules exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed directly at connector entry point to shunt transients before reaching ADC input or op-amp buffer. Use Value: Limits voltage to ≤45.4 V during 33 A surges, preventing latch-up or gate oxide damage in precision front-end circuitry. | Use Scenario: Guarding differential CAN_H/CAN_L lines in vehicle body control units against ESD and coupled noise from nearby solenoid drivers. IC Role / Device Role / Timing Role: Symmetrical clamping element across differential pair, leveraging bidirectional behavior to suppress both polarities without polarity-sensitive placement. Use Value: Maintains signal integrity by clamping transients below ISO 11898-2 common-mode immunity threshold while adding <0.5 pF capacitance per line. |
| Consumer Appliance Motor Drive | Telecom Power Input Stage |
Use Scenario: Safeguarding microcontroller I/O pins connected to brushed DC motor feedback circuits in smart home appliances. IC Role / Device Role / Timing Role: Localized TVS at motor driver IC output pins to absorb inductive kickback from commutation spikes. Use Value: Withstands 200 A non-repetitive forward surge (IFSM), enabling robust protection even during stall conditions. | Use Scenario: Front-end transient suppression on 24 V DC input rails of telecom remote radio units deployed in lightning-prone outdoor cabinets. IC Role / Device Role / Timing Role: Primary surge arrestor upstream of DC-DC converters and PMICs, sized for 1500 W peak pulse energy per IEC 61000-4-5 Level 4. Use Value: Delivers 45.4 V clamping at 33 A, ensuring downstream regulators remain within absolute maximum ratings during surge 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 |
|---|---|---|---|
| SMAJ28CA-E3/57T | Lower PPPM (400 W), same VWM (28 V), SMA (DO-214AC) package, higher RθJA (~100 °C/W) | Suitable for lower-energy transients; less effective in automotive load-dump scenarios requiring 1500 W | Select when board space is constrained and surge energy is limited to <400 W |
| SMCJ28CA-E3/57T | Same PPPM (1500 W), same VWM (28 V), larger SMC (DO-214AB) package, lower RθJA (~50 °C/W) | Better thermal performance but requires ~30% more PCB area; preferred for high-reliability industrial power supplies | Select when thermal management is critical and footprint allows SMC package |
Compared with SMAJ28CA-E3/57T and SMCJ28CA-E3/57T, the SMCG28CA-E3/57T delivers identical 1500 W surge capability in a smaller DO-215AB footprint than SMCJ while offering superior thermal resistance versus SMAJ-making it optimal for space-constrained automotive modules needing AEC-Q101 compliance.
Availability
SMCG28CA-E3/57T is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface protection, and telecom power rail hardening requiring stable component supply and AEC-Q101 traceability.
Supply support for SMCG28CA-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 supplier of discrete semiconductors, specializing in diodes, rectifiers, and protection devices with emphasis on reliability, automotive qualification, and high-volume manufacturability.
The SMCG series was developed specifically for AEC-Q101-compliant transient suppression in compact automotive and industrial modules where DO-215AB's thermal and surge performance balances size and ruggedness.
FAQ
What is the clamping voltage of SMCG28CA-E3/57T under a 10/1000 µs surge?
The SMCG28CA-E3/57T has a maximum clamping voltage (VC) of 45.4 V at 33.0 A peak pulse current, measured under the standardized 10/1000 µs waveform. This value ensures protected circuitry remains within safe operating limits during high-energy transients such as automotive load dump or inductive switching events. The clamping performance is guaranteed across the full operating temperature range and is validated per IEC 61000-4-5 test conditions.
Is SMCG28CA-E3/57T suitable for automotive applications?
Yes, SMCG28CA-E3/57T is AEC-Q101 qualified and explicitly designed for automotive use. It meets stress test requirements including high-temperature operating life, temperature cycling, and highly accelerated life testing. Its bidirectional configuration, 1500 W surge rating, and DO-215AB package with MSL Level 1 reflow compatibility make it appropriate for engine control units, body electronics, and ADAS sensor interfaces where reliability under harsh thermal and electrical conditions is mandatory.
Does SMCG28CA-E3/57T have polarity markings?
No, SMCG28CA-E3/57T does not have polarity markings because it is a bidirectional TVS diode. Unlike unidirectional variants (e.g., SMCG28A), which feature a cathode band, the CA suffix indicates symmetrical breakdown in both directions-eliminating the need for orientation during placement. This simplifies automated assembly and supports protection on AC-coupled or floating signal paths.
What is the thermal resistance of SMCG28CA-E3/57T?
The SMCG28CA-E3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the recommended 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pad layout per terminal. Its junction-to-lead resistance (RθJL) is 15 °C/W, reflecting efficient heat conduction into the PCB. These values are critical for calculating steady-state power derating and verifying safe operation under repetitive surge conditions in enclosed automotive or industrial enclosures.
How does SMCG28CA-E3/57T differ from SMCG28A-E3/57T?
The SMCG28CA-E3/57T is bidirectional with symmetrical clamping in both polarities, while SMCG28A-E3/57T is unidirectional and features a cathode band marking. Electrically, SMCG28CA-E3/57T has identical VWM (28 V) and PPPM (1500 W) but lacks forward surge rating (IFSM = 200 A applies only to unidirectional types). The CA version is used where polarity-independent protection is required-such as on differential buses or AC signal lines-whereas the A version suits DC power rail or single-ended I/O protection.
SMCG28CA-E3/57T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-215AB, SMC Gull Wing
- 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 (SMCG)
SMCG28CA-E3/57T FAQ
1.How can I place an order for SMCG28CA-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG28CA-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 SMCG28CA-E3/57T reliable?
The price and inventory of SMCG28CA-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 SMCG28CA-E3/57T is usually 5 days.
3.What payment methods are accepted for SMCG28CA-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG28CA-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG28CA-E3/57T?
SMCG28CA-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG28CA-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 SMCG28CA-E3/57T?
For technical support, including SMCG28CA-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG28CA-E3/57T requirements.
6.How does Aetrix verify that SMCG28CA-E3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG28CA-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 SMCG28CA-E3/57T meets industry standards.
7.What is the process for return or replacement of SMCG28CA-E3/57T?
All SMCG28CA-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG28CA-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 SMCG28CA-E3/57T part is unused and in its original packaging.
Return procedure for SMCG28CA-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG28CA-E3/57T Tags
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