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Vishay General Semiconductor - Diodes Division SMCG28A-M3/57T
- Part No.:
- SMCG28A-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG28A-M3/57T.pdf
- Description:
- TVS DIODE 28VWM 45.4VC DO215AB
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMCG28A-M3/57T from Vishay General Semiconductor is a unidirectional surface-mount TransZORB® transient voltage suppressor (TVS) in the SMCG (DO-215AB) package, designed for clamping inductive-switching and lightning-induced transients on power and signal lines. It features a 28 V stand-off voltage (VWM), 31.1–34.4 V breakdown voltage (VBR) at 1 mA, 1500 W peak pulse power (10/1000 µs), 33.0 A peak pulse current (IPPM), and 45.4 V maximum clamping voltage (VC) - deployed in automotive sensor protection and industrial DC bus interfaces.
For engineers reviewing the SMCG28A-M3/57T datasheet, SMCG28A-M3/57T pinout, SMCG28A-M3/57T application, or SMCG28A-M3/57T equivalent, key selection criteria include clamping performance under 10/1000 µs surge, AEC-Q101 qualification for automotive use, halogen-free RoHS compliance (M3 suffix), and thermal resistance (RθJA = 75 °C/W) for board-level thermal design.
Technical Context
This TVS diode operates as a unidirectional clamping device with a cathode-band polarity marking. Its glass-passivated junction delivers fast response time (<1 ns) and low incremental surge resistance, enabling effective suppression of ESD (IEC 61000-4-2) and EFT (IEC 61000-4-4) events. The device is rated for 200 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine) and supports operation from –55 °C to +150 °C junction temperature.
The SMCG28A-M3/57T uses the DO-215AB package with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102, meeting MSL Level 1 (260 °C peak reflow). Its 75 °C/W junction-to-ambient thermal resistance assumes mounting on 8.0 mm × 8.0 mm copper pads - critical for sustaining 6.5 W steady-state power dissipation at TA = 50 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28 V - maximum continuous reverse operating voltage before significant leakage; defines safe DC bias margin for protected line |
| VBR (min/max) | 31.1 V / 34.4 V at IT = 1 mA - guaranteed breakdown onset range; ensures predictable clamping initiation across production lot |
| VC @ IPPM | 45.4 V at 33.0 A (10/1000 µs) - clamped voltage during worst-case surge; determines maximum stress on downstream ICs |
| PPPM | 1500 W - peak transient power handling capability; validates robustness against ISO 7637-2 Pulse 1/2a/5a surges |
| ID @ VWM | 1.0 µA - reverse leakage at stand-off voltage; ensures minimal quiescent power loss in battery-powered systems |
| TJ max. | +150 °C - maximum junction temperature; enables use in under-hood automotive environments without derating |
| RθJA | 75 °C/W - thermal resistance with standard pad layout; informs minimum copper area needed for thermal management |
Pinout & Package
SMCG28A-M3/57T is housed in the SMCG (DO-215AB) surface-mount package: low-profile, gull-wing leaded outline with cathode band marking on the unidirectional variant. Leads are matte tin-plated and compliant with J-STD-002 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during clamping | Connected to protected line (e.g., 24 V rail); must be routed with low-inductance trace to minimize overshoot |
| Cathode | Current exit terminal during clamping | Connected to ground reference plane; requires solid thermal via connection to internal ground layers |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS sensor interfaces per stress test requirements |
| Halogen-free & RoHS compliant (M3) | Meets IEC 61249-2-21 and JEDEC J-STD-20E environmental mandates for green manufacturing |
| Low incremental surge resistance | Enables tighter clamping (VC/VBR ratio = 1.33) versus standard TVS diodes, reducing voltage overshoot on sensitive inputs |
| MSL Level 1 rating | Allows unlimited floor life and single-reflow processing at 260 °C peak, simplifying SMT assembly planning |
| Glass passivated junction | Provides stable VBR over lifetime and immunity to humidity-induced parameter drift in industrial enclosures |
Applications
| Automotive Sensor Protection | Industrial DC Power Bus |
|---|---|
Use Scenario: Protecting CAN transceiver inputs and LIN bus nodes from load-dump and jump-start transients in vehicle body electronics. IC Role / Device Role / Timing Role: Unidirectional clamping element placed between signal line and chassis ground, activated within <1 ns of overvoltage event. Use Value: Limits voltage seen by transceiver to ≤45.4 V during 33 A surge, preventing latch-up and ensuring ASIL-B functional safety compliance. |
Use Scenario: Safeguarding PLC I/O module power rails against inductive kickback from solenoid drivers and relay coils. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 24 V supply input, coordinated with upstream fuse and downstream LDO. Use Value: Absorbs 1500 W transient energy without degradation, maintaining system uptime during factory automation equipment switching cycles. |
| Telecom Line Interface | Consumer Appliance Control Board |
Use Scenario: Shielding Ethernet PHY power pins and auxiliary bias supplies from ESD and lightning-induced surges in outdoor base stations. IC Role / Device Role / Timing Role: Secondary protection stage after gas discharge tube (GDT), providing low-clamp final-stage suppression. Use Value: Delivers 1.0 µA leakage at 28 V, minimizing standby current drain while clamping to 45.4 V under IEC 61000-4-5 10/700 µs threat. |
Use Scenario: Securing microcontroller GPIOs and motor driver enable lines in washing machine main control boards exposed to mains-borne noise. IC Role / Device Role / Timing Role: Point-of-load TVS on 5 V/3.3 V logic rails, mounted adjacent to connector entry points. Use Value: Withstands 200 A 8.3 ms surge (IFSM), surviving repeated compressor startup events without parametric shift. |
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 | Lower PPPM (400 W), higher RθJA (100 °C/W), same VWM/VBR but lower IPPM (12.3 A) | Not AEC-Q101 qualified; suitable only for commercial-grade consumer electronics | Select when cost sensitivity outweighs automotive qualification and surge robustness requirements |
| SMCJ28A-M3/57T | Same VWM/VBR/VC specs, but higher PPPM (3000 W), higher IPPM (66.0 A), identical DO-214AB package footprint | Requires larger PCB pad area (10.0 mm × 10.0 mm) for thermal compliance; not optimized for space-constrained modules | Choose when system-level surge testing exceeds ISO 7637-2 Pulse 5b and thermal mass allows larger copper area |
Compared with SMAJ28A-E3/57T and SMCJ28A-M3/57T, the SMCG28A-M3/57T uniquely balances AEC-Q101 qualification, 1500 W surge capacity, and DO-215AB's compact gull-wing footprint - making it optimal for automotive ECUs where board space, reliability, and regulatory compliance are jointly constrained.
Availability
SMCG28A-M3/57T is available at Aetrix Electronics and suitable for automotive sensor protection, industrial DC power bus hardening, and telecom line interface designs requiring stable component supply and long-term lifecycle support.
Supply support for SMCG28A-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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for demanding industrial and automotive applications.
The SMCG series is part of Vishay's TransZORB® TVS platform, engineered specifically for high-energy transient suppression in space-constrained, thermally challenging environments - with emphasis on AEC-Q101 compliance and repeatable clamping performance.
FAQ
What is the clamping voltage of SMCG28A-M3/57T under a 10/1000 µs surge?
The SMCG28A-M3/57T has a maximum clamping voltage (VC) of 45.4 V at 33.0 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and represents the upper limit of voltage imposed on the protected circuit during standardized surge testing - critical for verifying compatibility with downstream IC absolute maximum ratings.
Is SMCG28A-M3/57T qualified for automotive applications?
Yes, SMCG28A-M3/57T is AEC-Q101 qualified, as confirmed in the Vishay document 88457 revision 09-Jan-2024. This qualification covers stress tests including HTGB, HTRB, TCT, and mechanical shock - validating its suitability for under-hood and cabin electronics such as body control modules and sensor signal conditioning circuits using SMCG28A-M3/57T.
What does the "M3" suffix mean in SMCG28A-M3/57T?
The "M3" suffix in SMCG28A-M3/57T indicates halogen-free, RoHS-compliant construction with JESD 201 Class 2 whisker resistance. It denotes industrial-grade reliability and environmental compliance - distinct from "E3" (standard RoHS) and "HM3" (AEC-Q101 + halogen-free). All M3 variants meet UL 94 V-0 flammability rating and are rated for MSL Level 1 reflow.
What is the thermal resistance of SMCG28A-M3/57T, and how is it measured?
The SMCG28A-M3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W, measured with the device mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal - as defined in Vishay document 88457. This value assumes no additional heatsinking and is essential for calculating allowable power dissipation at elevated ambient temperatures in designs using SMCG28A-M3/57T.
Can SMCG28A-M3/57T be used in bidirectional configurations?
No, SMCG28A-M3/57T is a unidirectional TVS diode, identified by the "A" suffix and cathode band marking. Bidirectional variants carry the "CA" suffix (e.g., SMCG28CA). Using SMCG28A-M3/57T in bidirectional applications would result in forward conduction during negative transients - potentially damaging the device or failing to protect the circuit. Always match suffix to polarity requirement.
SMCG28A-M3/57T 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-M3/57T FAQ
1.How can I place an order for SMCG28A-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG28A-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 SMCG28A-M3/57T reliable?
The price and inventory of SMCG28A-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 SMCG28A-M3/57T is usually 5 days.
3.What payment methods are accepted for SMCG28A-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG28A-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG28A-M3/57T?
SMCG28A-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG28A-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 SMCG28A-M3/57T?
For technical support, including SMCG28A-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG28A-M3/57T requirements.
6.How does Aetrix verify that SMCG28A-M3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG28A-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 SMCG28A-M3/57T meets industry standards.
7.What is the process for return or replacement of SMCG28A-M3/57T?
All SMCG28A-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG28A-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 SMCG28A-M3/57T part is unused and in its original packaging.
Return procedure for SMCG28A-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG28A-M3/57T Tags
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