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Vishay General Semiconductor - Diodes Division SMCG45-E3/57T
- Part No.:
- SMCG45-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG45-E3/57T.pdf
- Description:
- TVS DIODE 45VWM 80.3VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,630
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Product details
Overview
SMCG45-E3/57T from Vishay General Semiconductor is a bi-directional surface-mount Transient Voltage Suppressor (TVS) in the DO-215AB (SMCG) package, rated for 45 V stand-off voltage, 1500 W peak pulse power, and clamping at 72.7 V under 20.6 A surge current. It provides robust ESD and lightning surge protection for signal lines in automotive sensor units and industrial control interfaces.
For engineers reviewing the SMCG45-E3/57T datasheet, SMCG45-E3/57T pinout, SMCG45-E3/57T application, or SMCG45-E3/57T equivalent, key selection criteria include its AEC-Q101 qualification, bi-directional clamping symmetry, low thermal resistance (RθJA = 75 °C/W), and compatibility with automated SMT placement on standard 8.0 mm × 8.0 mm copper pads.
Technical Context
This device operates as a bi-directional avalanche diode, leveraging glass-passivated junction technology to achieve sub-nanosecond response time and symmetric clamping in both polarities. Its breakdown voltage range (50.0–55.3 V at 1 mA) ensures precise overvoltage thresholding without forward conduction during normal operation.
Designed for transient suppression per IEC 61000-4-2 (ESD) and IEC 61000-4-5 (surge), it delivers stable clamping performance across -55 °C to +150 °C junction temperature, with MSL Level 1 moisture sensitivity and matte tin-plated leads compliant with J-STD-002 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 45 V - Maximum continuous reverse operating voltage before clamping begins; defines safe signal swing margin for protected lines. |
| VBR (min/max) | 50.0 V / 55.3 V at 1 mA - Confirmed breakdown threshold range ensuring reliable turn-on without premature conduction. |
| VC @ IPPM | 72.7 V at 20.6 A - Clamped voltage during 10/1000 µs surge; determines maximum stress imposed on downstream ICs. |
| PPPM | 1500 W - Peak pulse power handling capacity; enables protection against high-energy transients like inductive switch-off spikes. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance on standard 8.0 mm × 8.0 mm pads; informs derating requirements above 25 °C ambient. |
| TJ max. | +150 °C - Maximum allowable junction temperature; supports operation in under-hood automotive environments. |
Pinout & Package
Package: DO-215AB (SMCG) - Surface-mount gull-wing leaded package with 2 terminals, 7.11 mm × 3.17 mm body, 0.61 mm lead thickness, and UL 94 V-0 molding compound. No polarity marking for bi-directional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional transient conduction path | Both terminals function identically; no cathode band marking; enables placement without orientation check in PCB layout. |
| Leads (L1/L2) | Thermal and electrical interface to PCB | Matte tin-plated, solderable per J-STD-002; designed for direct thermal coupling to 8.0 mm × 8.0 mm copper pads per datasheet fig. 2. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock testing per AEC specification. |
| Glass-passivated junction | Ensures stable leakage current (<1.0 µA at VWM) and long-term parameter stability under thermal stress and humidity exposure. |
| MSL Level 1 (260 °C peak) | Enables standard reflow soldering without pre-baking; compatible with high-volume automated assembly lines. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ESD), improving protection margin for sensitive CMOS inputs. |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting ABS wheel speed sensor signal lines from load-dump-induced surges and ESD events in vehicle chassis environments. IC Role / Device Role / Timing Role: Bi-directional TVS clamp placed directly at connector entry point to shunt transients before reaching analog front-end amplifier. Use Value: Maintains signal integrity under ±15 kV contact ESD (IEC 61000-4-2) and 10/1000 µs surges up to 1500 W without degradation over 1000+ cycles. | Use Scenario: Safeguarding CANH/CANL differential pair in factory automation PLC modules exposed to motor drive noise and relay switching transients. IC Role / Device Role / Timing Role: Paired SMCG45-E3/57T devices (one per line) provide symmetrical clamping to preserve differential signaling margins. Use Value: Limits common-mode surge voltage to ≤72.7 V while maintaining <1.0 µA leakage at 45 V, preventing false triggering of CAN transceivers. |
| Consumer IoT Power Input | Telecom Line Card Surge Protection |
Use Scenario: Securing 5 V/12 V DC input rails of smart home hubs against accidental AC mains coupling and lightning-induced surges. IC Role / Device Role / Timing Role: Primary-level TVS placed upstream of DC-DC converter input to absorb energy before regulation stage. Use Value: Handles 200 A non-repetitive surge (IFSM-equivalent) and dissipates 1500 W peak power without failure, enabling single-stage protection architecture. | Use Scenario: Protecting Ethernet PHY interface power and data lines in VoIP gateways subjected to telecom-grade lightning surges (IEC 61000-4-5 Level 4). IC Role / Device Role / Timing Role: Bi-directional clamping element co-located with common-mode chokes to suppress differential and common-mode transients simultaneously. Use Value: Achieves <10 ns response time and clamps to 72.7 V at 20.6 A, meeting GR-1089-CORE surge immunity requirements for Class B equipment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ45A-E3/57T | Uni-directional; 45 V VWM, 73.0 V VC @ 19.2 A; SMA package (DO-214AC); RθJA = 85 °C/W. | Requires polarity-aware layout; less suitable for AC-coupled or bidirectional signal lines. | Select when protecting DC-biased lines where unidirectional clamping suffices and board space allows SMA footprint. |
| SMCJ45CA-E3/57T | Bi-directional; 45 V VWM, 73.0 V VC @ 20.5 A; SMC package (DO-214AB); higher PPPM (1500 W same), but larger footprint (7.11 mm × 6.22 mm). | Same clamping performance but requires 30% more PCB area; better thermal mass for sustained surge duty. | Choose when thermal derating margin is critical and DO-215AB size constraint does not apply. |
Compared with SMAJ45A-E3/57T and SMCJ45CA-E3/57T, the SMCG45-E3/57T offers identical electrical protection performance in a smaller DO-215AB footprint, optimized for high-density automotive and industrial PCBs where bi-directional symmetry and AEC-Q101 compliance are mandatory.
Availability
SMCG45-E3/57T is available at Aetrix Electronics and suitable for automotive sensor protection, industrial CAN bus interface, and consumer IoT power input applications requiring stable component supply and full traceability.
Supply support for SMCG45-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, and protection devices with emphasis on reliability and automotive qualification.
The SMCG series was developed specifically for high-reliability bi-directional transient suppression in space-constrained automotive and industrial systems, combining AEC-Q101 validation with low-profile gull-wing packaging.
FAQ
What is the clamping voltage of the SMCG45-E3/57T under maximum surge conditions?
The SMCG45-E3/57T clamps to 72.7 V when subjected to its rated peak pulse current of 20.6 A using a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and represents the maximum voltage seen by protected circuitry during worst-case transient events, ensuring downstream components remain within safe operating limits.
Is the SMCG45-E3/57T suitable for automotive applications?
Yes, the SMCG45-E3/57T is AEC-Q101 qualified and explicitly rated for automotive use. Its construction includes glass-passivated junctions, MSL Level 1 reflow compatibility, and operation across -55 °C to +150 °C junction temperature-meeting requirements for engine control, ADAS sensors, and body electronics where reliability under thermal and mechanical stress is critical.
Does the SMCG45-E3/57T have polarity markings on the package?
No, the SMCG45-E3/57T has no polarity markings because it is a bi-directional TVS diode. The DO-215AB package features symmetrical terminals with identical electrical behavior in both directions, eliminating orientation constraints during automated placement and simplifying PCB layout verification.
What is the thermal resistance of the SMCG45-E3/57T under standard mounting conditions?
The SMCG45-E3/57T exhibits a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. This value is critical for calculating power derating above 25 °C ambient and confirms suitability for thermally demanding locations such as near power converters or motor drivers.
Can the SMCG45-E3/57T replace uni-directional TVS diodes in existing designs?
The SMCG45-E3/57T can replace uni-directional TVS diodes only if the circuit topology supports bi-directional clamping-such as AC-coupled signal lines or floating power rails. Unlike uni-directional parts like SMAJ45A-E3/57T, it conducts equally in both directions and lacks a cathode band, so redesign review is required to confirm compatibility with system grounding and biasing schemes.
SMCG45-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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 45V
- Voltage - Breakdown (Min):
- 50V
- Voltage - Clamping (Max) @ Ipp:
- 80.3V
- Current - Peak Pulse (10/1000µs):
- 18.7A
- 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)
SMCG45-E3/57T FAQ
1.How can I place an order for SMCG45-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG45-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 SMCG45-E3/57T reliable?
The price and inventory of SMCG45-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 SMCG45-E3/57T is usually 5 days.
3.What payment methods are accepted for SMCG45-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG45-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG45-E3/57T?
SMCG45-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG45-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 SMCG45-E3/57T?
For technical support, including SMCG45-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG45-E3/57T requirements.
6.How does Aetrix verify that SMCG45-E3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG45-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 SMCG45-E3/57T meets industry standards.
7.What is the process for return or replacement of SMCG45-E3/57T?
All SMCG45-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG45-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 SMCG45-E3/57T part is unused and in its original packaging.
Return procedure for SMCG45-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG45-E3/57T Tags
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