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Vishay General Semiconductor - Diodes Division SMCG28A-E3/57T
- Part No.:
- SMCG28A-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG28A-E3/57T.pdf
- Description:
- TVS DIODE 28VWM 45.4VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,328
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Product details
Overview
SMCG28A-E3/57T from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMCG (DO-215AB) package, designed for robust overvoltage protection of sensitive electronics. It features a 28 V stand-off voltage (VWM), 31.1–34.4 V breakdown voltage (VBR) at 1 mA, 45.4 V maximum clamping voltage (VC) at 33.0 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with a 10/1000 µs waveform - deployed in automotive sensor signal lines and industrial I/O interfaces.
For engineers reviewing the SMCG28A-E3/57T datasheet, SMCG28A-E3/57T pinout, SMCG28A-E3/57T application, or SMCG28A-E3/57T equivalent, key selection criteria include clamping performance under 33 A surge, thermal resistance (RθJA = 75 °C/W), AEC-Q101 qualification, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
This TVS diode operates as a unidirectional shunt protector, leveraging a glass-passivated silicon junction to achieve sub-nanosecond response time and low incremental surge resistance. Its bidirectional counterpart uses the "CA" suffix (e.g., SMCG28CA), but SMCG28A-E3/57T is strictly unidirectional, with cathode marked by a band and polarity-critical placement in DC-biased circuits.
The device complies with ANSI/IEEE C62.35 for surge testing and meets J-STD-020 MSL Level 1 (260 °C peak reflow). It is rated for -55 °C to +150 °C operating junction temperature and supports 200 A non-repetitive forward surge (IFSM, 8.3 ms half-sine), making it suitable for load-dump and inductive-switching transient suppression in 12 V/24 V systems.
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 mA - ensures reliable turn-on above system operating voltage with margin |
| VC @ IPPM | 45.4 V at 33.0 A - limits downstream voltage stress during 10/1000 µs transients |
| PPPM | 1500 W - handles high-energy surges common in automotive and industrial environments |
| RθJA | 75 °C/W - requires thermal pad design per recommended 8.0 mm × 8.0 mm copper area for safe 6.5 W dissipation |
| IFSM | 200 A - withstands single-event load-dump pulses without failure |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling and HTRB |
Pinout & Package
Package: SMCG (DO-215AB), low-profile surface-mount case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Polarity-marked with cathode band; no marking on bidirectional variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during clamping | Connected to protected line (e.g., CAN_H, LIN, sensor output); must be routed with low-inductance path |
| Cathode | Current exit point during clamping | Connected to ground or lower-potential rail; band-marked end; critical for correct unidirectional orientation |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR over lifetime and immunity to moisture-induced degradation |
| MSL Level 1 rating | Enables standard SMT reflow without baking or special handling |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 Pulse 1/2a) |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body, and ADAS subsystems |
| UL 94 V-0 molding compound | Meets flammability safety requirements for enclosed industrial and automotive enclosures |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting analog output lines of pressure, temperature, or position sensors in engine control modules exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional shunt clamp placed between sensor output and ground, activated only during positive transients exceeding 28 V. Use Value: Limits clamped voltage to ≤45.4 V, preventing damage to downstream ADC inputs or op-amps while maintaining signal integrity below VWM. | Use Scenario: Safeguarding RS-485 transceiver data lines in factory automation PLCs subjected to EFT and surge per IEC 61000-4-4/-5. IC Role / Device Role / Timing Role: Standoff-mode protector on differential bus lines, conducting only during overvoltage events with <1 ns response. Use Value: Clamps 1 kV/500 A surge to <45.4 V within nanoseconds, preserving communication integrity without affecting normal 0–5 V signaling. |
| DC Power Rail Protection | Automotive LIN Bus |
Use Scenario: Guarding 24 V supply rails in telematics units against ISO 16750-2 jump-start and battery-reverse conditions. IC Role / Device Role / Timing Role: Unidirectional TVS connected anode-to-rail, cathode-to-ground, absorbing reverse energy and positive spikes. Use Value: Withstands 200 A 8.3 ms surge (IFSM) and clamps 1500 W transients, enabling compliance with OEM power-supply immunity specs. | Use Scenario: Protecting LIN transceiver pins in door modules and seat controllers from ESD and inductive switching noise. IC Role / Device Role / Timing Role: Low-capacitance (typ. <100 pF) unidirectional clamp on LIN bus line, grounded at cathode. Use Value: Maintains LIN signal rise/fall times (<20 ns) while suppressing ±30 kV contact ESD per ISO 10605 due to fast response and low dynamic impedance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ28A-E3/57T | Same VWM (28 V) and PPPM (400 W), but lower 400 W rating and SMA (DO-214AC) package | Limited to lower-energy transients; not AEC-Q101 qualified | Select when cost or board space is constrained and automotive qualification is unnecessary |
| SMCJ28A-E3/57T | Same VWM (28 V), higher PPPM (1500 W), but larger SMC (DO-214AB) package and RθJA = 19 °C/W | Better thermal performance on minimal copper; less suitable for dense automotive PCBs | Select when higher sustained power handling is needed and layout allows larger footprint |
Compared with SMAJ28A-E3/57T, SMCG28A-E3/57T delivers AEC-Q101 reliability and DO-215AB compactness; versus SMCJ28A-E3/57T, it trades thermal margin for smaller size and automotive qualification - ideal for space-constrained, high-reliability 12 V/24 V nodes.
Availability
SMCG28A-E3/57T is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O interface hardening, and DC power rail surge suppression requiring stable component supply across production lifecycles.
Supply support for SMCG28A-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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMCG series targets high-energy transient suppression in automotive and industrial environments, engineered for AEC-Q101 compliance, automated assembly, and robust clamping performance in compact surface-mount formats.
FAQ
What is the clamping voltage of SMCG28A-E3/57T at its rated peak pulse current?
The SMCG28A-E3/57T has a maximum clamping voltage (VC) of 45.4 V at 33.0 A peak pulse current (IPPM), measured using a 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during surge events and is critical for ensuring downstream ICs remain within absolute maximum ratings. The SMCG28A-E3/57T achieves this clamping performance while maintaining low dynamic impedance.
Is SMCG28A-E3/57T suitable for automotive applications?
Yes, SMCG28A-E3/57T is AEC-Q101 qualified and specifically designed for automotive use, including engine control units, body electronics, and ADAS sensor interfaces. Its construction - glass-passivated junction, MSL Level 1 reflow compatibility, and operation from -55 °C to +150 °C - meets stringent automotive reliability requirements. The SMCG28A-E3/57T also complies with ISO 7637-2 and ISO 16750-2 surge immunity test profiles when applied per recommended layout.
What does the "E3/57T" suffix indicate in SMCG28A-E3/57T?
The "E3" suffix denotes RoHS-compliant, industrial-grade construction with matte tin-plated leads, while "57T" specifies packaging in 7-inch diameter plastic tape and reel containing 850 units. This format enables direct integration into high-speed pick-and-place equipment. The SMCG28A-E3/57T is distinct from HE3-suffixed variants, which add AEC-Q101 qualification - though SMCG28A-E3/57T itself is AEC-Q101 qualified per Vishay documentation.
How does SMCG28A-E3/57T differ from bidirectional TVS diodes like SMCG28CA?
SMCG28A-E3/57T is unidirectional and conducts only during positive transients relative to its cathode, whereas SMCG28CA is bidirectional and protects both polarities. The unidirectional SMCG28A-E3/57T offers lower leakage current (<1 µA at 28 V) and is preferred for DC-biased lines like power rails or sensor outputs. Its cathode is marked with a band; SMCG28CA has no polarity marking. Both share identical VWM (28 V) and PPPM (1500 W), but SMCG28A-E3/57T cannot suppress negative-going surges.
What PCB layout guidance applies to SMCG28A-E3/57T for optimal thermal and electrical performance?
For optimal performance, SMCG28A-E3/57T must be mounted on minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal to achieve rated 1500 W PPPM and manage thermal resistance (RθJA = 75 °C/W). Short, wide traces to ground reduce inductance and improve clamping speed. Avoid thermal reliefs on pads. The SMCG28A-E3/57T cathode band must align with ground net routing, and the device must be placed as close as possible to the protected node - typically within 5 mm of connector or IC pin.
SMCG28A-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:
- 1
- Bidirectional Channels:
- -
- 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)
SMCG28A-E3/57T FAQ
1.How can I place an order for SMCG28A-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG28A-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 SMCG28A-E3/57T reliable?
The price and inventory of SMCG28A-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 SMCG28A-E3/57T is usually 5 days.
3.What payment methods are accepted for SMCG28A-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG28A-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG28A-E3/57T?
SMCG28A-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG28A-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 SMCG28A-E3/57T?
For technical support, including SMCG28A-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG28A-E3/57T requirements.
6.How does Aetrix verify that SMCG28A-E3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG28A-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 SMCG28A-E3/57T meets industry standards.
7.What is the process for return or replacement of SMCG28A-E3/57T?
All SMCG28A-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG28A-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 SMCG28A-E3/57T part is unused and in its original packaging.
Return procedure for SMCG28A-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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