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Vishay General Semiconductor - Diodes Division SMCG28CA-M3/57T
- Part No.:
- SMCG28CA-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG28CA-M3/57T.pdf
- Description:
- TVS DIODE 28VWM 45.4VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,780
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Product details
Overview
SMCG28CA-M3/57T from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in the SMCG (DO-215AB) package, designed for robust overvoltage protection on signal and power 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 (PPPM), clamping voltage of 45.4 V at 33 A, and AEC-Q101 qualification for automotive reliability.
For engineers reviewing the SMCG28CA-M3/57T datasheet, SMCG28CA-M3/57T pinout, SMCG28CA-M3/57T application, or SMCG28CA-M3/57T equivalent, this device is selected for high-energy surge suppression in automotive sensor interfaces, industrial I/O protection, and DC power rail hardening where bidirectional clamping, low clamping ratio, and halogen-free RoHS compliance are required.
Technical Context
The SMCG28CA-M3/57T operates as a bidirectional avalanche diode, symmetrically clamping transients above ±31.1 V in either polarity without polarity marking. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns), while the DO-215AB package provides low thermal resistance (RθJL = 15 °C/W) for effective surge energy dissipation.
Rated for 1500 W peak pulse power (10/1000 µs waveform) and 33 A peak pulse current, it maintains clamping performance across -55 °C to +150 °C operating temperature range and meets MSL Level 1 reflow compatibility with 260 °C peak soldering profile.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28 V - Maximum continuous reverse working voltage before clamping begins |
| VBR min/max | 31.1 V / 34.4 V at 1 mA - Confirmed breakdown threshold range ensuring reliable turn-on margin |
| VC @ IPPM | 45.4 V at 33 A - Clamped voltage during 1500 W surge, defining protected circuit voltage ceiling |
| PPPM | 1500 W - Peak transient energy handling capability per 10/1000 µs waveform |
| ID @ VWM | 1.0 µA - Ultra-low leakage at rated stand-off, minimizing standby power loss |
| TJ max | +150 °C - Junction temperature limit enabling operation in under-hood automotive environments |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling and HTRB |
Pinout & Package
Package: SMCG (DO-215AB) - surface-mount, gull-wing leaded case with matte tin-plated terminals, 8.0 mm × 8.0 mm copper pad layout recommended for thermal and surge performance. Bidirectional construction means no cathode/anode marking; both terminals are functionally identical.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Transient input/output node | Connects to line under protection (e.g., CAN bus, sensor supply); symmetrical with Terminal 2 |
| Terminal 2 | Transient input/output node | Connects to reference (GND or return path); electrically identical to Terminal 1 in bidirectional mode |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| Halogen-free & RoHS compliant (M3 suffix) | Meets environmental compliance requirements for automotive and industrial end equipment |
| Low incremental surge resistance | Supports tight clamping voltage (VC/VBR ≈ 1.45) for improved system-level ESD/surge margin |
| MSL Level 1 rating | Allows standard SMT reflow without moisture sensitivity handling or baking |
| Glass-passivated junction | Ensures long-term stability of VBR and leakage under thermal and electrical stress |
Applications
| Automotive Sensor Protection | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting LIN/CAN transceiver inputs and analog sensor outputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS placed between signal line and chassis ground to clamp ±100 V transients within nanoseconds. Use Value: Prevents latch-up or permanent damage to ASICs and microcontrollers by limiting voltage to ≤45.4 V during 33 A surges. | Use Scenario: Hardening PLC digital input modules against field-wiring induced surges and relay coil flyback. IC Role / Device Role / Timing Role: Line-side TVS on 24 V DC input channels, absorbing repetitive 1500 W transients without degradation. Use Value: Eliminates need for external series impedance or RC filtering due to low clamping voltage and fast response. |
| DC Power Rail Protection | Telecom Interface Protection |
Use Scenario: Safeguarding 24 V/48 V intermediate bus rails in PoE-powered equipment and motor drives. IC Role / Device Role / Timing Role: Parallel-connected TVS across rail-to-ground, triggered only during overvoltage events exceeding 28 V. Use Value: Maintains <1 µA leakage at nominal voltage, avoiding unnecessary power drain while delivering full 1500 W surge capacity. | Use Scenario: Protecting RS-485/RS-422 differential pairs in base station backhaul and network infrastructure. IC Role / Device Role / Timing Role: Bidirectional suppression on each data line relative to common-mode reference, compatible with differential signaling. Use Value: Symmetric clamping preserves signal integrity during EFT/burst events without introducing DC offset or asymmetry. |
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 | Same VWM (28 V) and bidirectional configuration, but SMA (DO-214AC) package; lower PPPM (400 W) and higher RθJA (110 °C/W) | Limited to lower-energy transients; not AEC-Q101 qualified | Select when board space allows larger footprint and automotive qualification is not required |
| SMCJ28CA | Same DO-215AB package and 1500 W rating, but unidirectional variant requires polarity-aware layout; lacks CA suffix designation for bidirectional symmetry | Requires explicit cathode/anode routing; unsuitable for AC or floating lines without additional components | Choose only if unidirectional clamping suffices and polarity control is feasible in PCB design |
Compared with SMAJ28CA and SMCJ28CA, the SMCG28CA-M3/57T uniquely combines bidirectional symmetry, AEC-Q101 qualification, halogen-free compliance, and DO-215AB packaging-enabling drop-in use in space-constrained automotive and industrial designs requiring zero-polarity dependency and high-reliability surge immunity.
Availability
SMCG28CA-M3/57T is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom data line protection requiring stable component supply, consistent halogen-free compliance, and AEC-Q101 traceability.
Supply support for SMCG28CA-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, efficiency, and application-specific optimization.
The SMCG series targets high-energy transient suppression in harsh environments, with design focus on automotive-grade robustness, compact surface-mount form factors, and precise clamping performance for safety-critical electronics.
FAQ
What does the "CA" suffix indicate in SMCG28CA-M3/57T?
The "CA" suffix denotes a bidirectional configuration, meaning the SMCG28CA-M3/57T clamps voltage transients equally in both polarities-ideal for protecting AC-coupled signals, differential buses, or floating nodes where polarity is undefined. Unlike unidirectional variants (e.g., SMCG28A), it has no cathode marking and exhibits matched VBR in positive and negative directions.
Is SMCG28CA-M3/57T suitable for automotive applications?
Yes, the SMCG28CA-M3/57T is AEC-Q101 qualified and rated for operation from -55 °C to +150 °C, making it suitable for under-hood and body-control module applications. Its halogen-free (M3) construction, MSL Level 1 reflow compatibility, and validated surge performance align with automotive electronics requirements per ISO 7637-2 and ISO 16750-2.
How does the SMCG28CA-M3/57T compare to SMAJ28CA in terms of surge handling?
The SMCG28CA-M3/57T delivers 1500 W peak pulse power (10/1000 µs), triple that of the SMAJ28CA (400 W), due to its larger DO-215AB package and lower thermal resistance. This enables the SMCG28CA-M3/57T to sustain higher surge currents (33 A vs. 12.3 A) and maintain tighter clamping (45.4 V vs. 49.9 V), critical for demanding automotive and industrial transients.
What is the significance of the "M3" in SMCG28CA-M3/57T?
The "M3" suffix indicates halogen-free, RoHS-compliant construction meeting JEDEC JESD201 Class 2 whisker resistance, intended for industrial-grade reliability. It distinguishes the part from "E3" (standard RoHS) and "HM3" (AEC-Q101 + halogen-free) variants-confirming environmental compliance without automotive qualification overhead unless explicitly needed.
Can SMCG28CA-M3/57T be used in place of a unidirectional TVS like SMCG28A?
No-SMCG28CA-M3/57T is strictly bidirectional and lacks polarity marking, so it cannot replace unidirectional devices like SMCG28A in circuits requiring forward conduction or DC bias paths. Substitution would require verifying that the application tolerates symmetrical clamping and that no steady-state forward current flows through the device, as it lacks a defined anode/cathode.
SMCG28CA-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:
- -
- 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-M3/57T FAQ
1.How can I place an order for SMCG28CA-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG28CA-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 SMCG28CA-M3/57T reliable?
The price and inventory of SMCG28CA-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 SMCG28CA-M3/57T is usually 5 days.
3.What payment methods are accepted for SMCG28CA-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG28CA-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG28CA-M3/57T?
SMCG28CA-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG28CA-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 SMCG28CA-M3/57T?
For technical support, including SMCG28CA-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG28CA-M3/57T requirements.
6.How does Aetrix verify that SMCG28CA-M3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG28CA-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 SMCG28CA-M3/57T meets industry standards.
7.What is the process for return or replacement of SMCG28CA-M3/57T?
All SMCG28CA-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG28CA-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 SMCG28CA-M3/57T part is unused and in its original packaging.
Return procedure for SMCG28CA-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG28CA-M3/57T Tags
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