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Vishay General Semiconductor - Diodes Division SMCG17A-M3/57T
- Part No.:
- SMCG17A-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG17A-M3/57T.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO215AB
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMCG17A-M3/57T 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 17 V stand-off voltage (VWM), 18.9–20.9 V breakdown voltage (VBR) at 1 mA, 1500 W peak pulse power (PPPM), 54.3 A peak pulse current (IPPM), and clamps transients to ≤27.6 V at IPPM - ideal for protecting automotive sensor signal lines and industrial I/O interfaces.
For engineers reviewing the SMCG17A-M3/57T datasheet, SMCG17A-M3/57T pinout, SMCG17A-M3/57T application, or SMCG17A-M3/57T equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), halogen-free RoHS compliance (M3 suffix), and real-world use context for ESD/surge protection in harsh environments.
Technical Context
This TVS diode operates as a clamping device that remains non-conductive below its 17 V stand-off voltage and rapidly transitions to low-impedance conduction when transient voltages exceed its 18.9–20.9 V breakdown threshold. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and repeatable clamping performance across temperature.
The SMCG17A-M3/57T uses a unidirectional configuration with cathode-band polarity marking, supports 10/1000 µs surge waveforms per ANSI/IEEE C62.35, and meets MSL Level 1 (260 °C reflow peak) with matte tin-plated leads compliant to J-STD-002 and JESD 22-B102.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - maximum continuous reverse operating voltage before clamping initiates; defines safe signal line operating margin. |
| VBR (min/max) | 18.9 V / 20.9 V at 1 mA - guaranteed breakdown range ensuring predictable turn-on during transients. |
| VC @ IPPM | ≤27.6 V at 54.3 A - clamping voltage under 10/1000 µs surge; determines protected circuit's maximum stress level. |
| PPPM | 1500 W - peak pulse power handling capacity; enables robust protection against lightning-induced surges and inductive switching spikes. |
| ID @ VWM | ≤1.0 µA - ultra-low reverse leakage at rated stand-off voltage, minimizing standby power loss and signal distortion. |
| RθJA | 75 °C/W - junction-to-ambient thermal resistance on standard 8.0 mm × 8.0 mm copper pads; informs board-level thermal design requirements. |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock testing. |
Pinout & Package
Package: SMCG (DO-215AB) - low-profile, surface-mount gull-wing package with 2 terminals; meets UL 94 V-0 flammability rating and JEDEC MSL Level 1 reflow compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to ground or lower-potential rail in unidirectional TVS configuration. | Provides reference path for clamping action; must be routed with low-inductance connection to minimize voltage overshoot during fast transients. |
| Cathode (marked with band) | Current exit terminal in forward bias; connected to protected line (e.g., CAN_H, LIN, sensor output). | Defines polarity-sensitive placement; incorrect orientation disables protection and risks catastrophic failure under reverse surge. |
Key Features
| Feature | Design Value |
|---|---|
| Halogen-free & RoHS compliant (M3 suffix) | Meets environmental compliance requirements for industrial and automotive production without compromising surge robustness. |
| Glass passivated chip junction | Ensures long-term parameter stability and resistance to moisture ingress, critical for operation in humid or condensing environments. |
| Low incremental surge resistance | Enables tighter clamping (VC/VBR ratio ≈ 1.45) and higher energy absorption efficiency compared to polymer-based protectors. |
| Very fast response time (<1 ps) | Clamps transients before downstream ICs experience damaging overvoltage - essential for protecting high-speed sensor interfaces and microcontroller GPIOs. |
| MSL Level 1 rating | Supports standard SMT reflow profiles up to 260 °C peak without preconditioning, simplifying manufacturing integration. |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure, temperature, and position sensors in engine control units and ADAS modules exposed to load-dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between sensor output and microcontroller ADC input to limit transient excursions to safe levels. Use Value: Maintains signal integrity under 100 V/10 ms load-dump events while adding <1 pF capacitance - no impact on 10-bit+ sensor resolution. |
Use Scenario: Safeguarding RS-485/RS-422 transceiver data lines in programmable logic controllers and motor drives subjected to inductive kickback and EFT bursts. IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional TVS (used in back-to-back pair) providing common-mode surge suppression on differential bus lines. Use Value: Withstands 1500 W surges without degradation, enabling >100,000 surge cycles in factory automation equipment per IEC 61000-4-5 Class 3. |
| Consumer Power Adapter Input | Telecom Line Card Protection |
|
Use Scenario: Secondary-side DC bus protection in USB-C PD adapters and wireless charging circuits vulnerable to capacitor discharge and hot-plug transients. IC Role / Device Role / Timing Role: Standoff-rated TVS placed after DC-DC converter output to clamp overvoltage from feedback loop instability or synchronous rectifier shoot-through. Use Value: 17 V VWM aligns with 12–15 V adapter outputs; 27.6 V VC prevents latch-up in downstream GaN FET drivers and USB-PD controllers. |
Use Scenario: Primary protection for Ethernet PHY interface pins and POTS line drivers in VoIP gateways and base station remote units. IC Role / Device Role / Timing Role: First-stage TVS on RJ-45 magnetics secondary side, coordinated with GDT and MOV for multi-level surge defense. Use Value: Fast response and low Rsurge reduce let-through energy to <50 mJ, extending lifetime of 100BASE-TX transformers and magnetics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ17A-E3/57T | Same VWM (17 V) and PPPM (400 W), but lower power rating; SMA (DO-214AC) package with higher RθJA (110 °C/W). | Limited to lower-energy transients (e.g., ESD-only); unsuitable for ISO 7637-2 Pulse 5a load-dump protection. | Select SMAJ17A-E3/57T only when board space allows larger SMA footprint and surge energy is ≤400 W. |
| SMCJ17A-M3/57T | Identical VWM (17 V), higher PPPM (1500 W), same DO-214AB package; differs in thermal resistance (RθJA = 40 °C/W vs. 75 °C/W for SMCG). | Better thermal performance enables sustained surge duty cycles; requires larger copper pour for optimal derating. | Choose SMCJ17A-M3/57T when PCB layout permits larger pad area and higher average surge repetition rate is required. |
Compared with SMAJ17A-E3/57T and SMCJ17A-M3/57T, the SMCG17A-M3/57T delivers identical surge power handling in a lower-profile DO-215AB package with AEC-Q101 qualification - making it the preferred choice for space-constrained automotive and industrial modules where reliability validation is mandatory.
Availability
SMCG17A-M3/57T is available at Aetrix Electronics and suitable for automotive sensor systems, industrial PLC I/O modules, consumer power adapters, and telecom line cards requiring stable component supply and full traceability.
Supply support for SMCG17A-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, and passive components for automotive, industrial, and computing markets.
The SMCG series was engineered specifically for AEC-Q101-compliant transient suppression in compact surface-mount designs - targeting next-generation ECUs, ADAS sensors, and ruggedized communication interfaces.
FAQ
What is the clamping voltage of SMCG17A-M3/57T at its rated peak pulse current?
The SMCG17A-M3/57T has a maximum clamping voltage (VC) of 27.6 V when subjected to its rated 10/1000 µs peak pulse current of 54.3 A. This value is measured under standardized test conditions per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMCG17A-M3/57T maintains this clamping performance across its qualified operating temperature range of -55 °C to +150 °C.
Is SMCG17A-M3/57T suitable for automotive applications?
Yes, the SMCG17A-M3/57T is AEC-Q101 qualified and explicitly designed for automotive use, including engine control units, body electronics, and ADAS sensor modules. Its halogen-free (M3) construction, MSL Level 1 reflow compatibility, and validated performance under temperature cycling, humidity bias, and mechanical shock meet stringent automotive reliability requirements. The SMCG17A-M3/57T is referenced in Vishay's automotive-grade TVS portfolio documentation for ISO 7637-2 and ISO 16750-2 compliance support.
How does the SMCG17A-M3/57T differ from the SMCG17A-E3/57T variant?
The SMCG17A-M3/57T uses a halogen-free molding compound and matte tin plating meeting JESD 201 Class 2 whisker resistance, whereas the SMCG17A-E3/57T is RoHS-compliant but not halogen-free. Both share identical electrical specifications (VWM = 17 V, PPPM = 1500 W, VC = 27.6 V), package (DO-215AB), and AEC-Q101 qualification. The SMCG17A-M3/57T is specified for industrial-grade applications requiring halogen-free compliance, while SMCG17A-E3/57T targets general-purpose RoHS needs. The SMCG17A-M3/57T is the preferred version for automotive Tier 1 suppliers with strict material declarations.
What is the thermal resistance of SMCG17A-M3/57T, and how does it affect PCB layout?
The SMCG17A-M3/57T has 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 assumes minimum recommended pad layout per Vishay's datasheet Figure 6. To maintain safe junction temperatures under repeated surges, designers must allocate sufficient copper area and consider thermal vias beneath the pads. Reducing pad size increases RθJA, accelerating thermal derating - for example, halving pad area raises RθJA by ~30 %, limiting usable surge duty cycle. The SMCG17A-M3/57T's thermal behavior is fully characterized in the datasheet's Fig. 2 derating curves.
Can SMCG17A-M3/57T be used in bidirectional protection configurations?
No - the SMCG17A-M3/57T is a unidirectional TVS diode, indicated by the "A" suffix and cathode-band marking. For bidirectional protection, Vishay specifies the SMCG17CA variant (e.g., SMCG17CA-M3/57T), which has symmetric breakdown in both directions and no polarity marking. Using the SMCG17A-M3/57T in reverse-biased mode beyond its 17 V stand-off voltage risks permanent damage due to uncontrolled avalanche conduction. The SMCG17A-M3/57T must be oriented with cathode toward the protected line and anode to ground to function correctly.
SMCG17A-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):
- 17V
- Voltage - Breakdown (Min):
- 18.9V
- Voltage - Clamping (Max) @ Ipp:
- 27.6V
- Current - Peak Pulse (10/1000µs):
- 54.3A
- 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)
SMCG17A-M3/57T FAQ
1.How can I place an order for SMCG17A-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG17A-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 SMCG17A-M3/57T reliable?
The price and inventory of SMCG17A-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 SMCG17A-M3/57T is usually 5 days.
3.What payment methods are accepted for SMCG17A-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG17A-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG17A-M3/57T?
SMCG17A-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG17A-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 SMCG17A-M3/57T?
For technical support, including SMCG17A-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG17A-M3/57T requirements.
6.How does Aetrix verify that SMCG17A-M3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG17A-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 SMCG17A-M3/57T meets industry standards.
7.What is the process for return or replacement of SMCG17A-M3/57T?
All SMCG17A-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG17A-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 SMCG17A-M3/57T part is unused and in its original packaging.
Return procedure for SMCG17A-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG17A-M3/57T Tags
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