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Vishay General Semiconductor - Diodes Division SMCG170A-E3/57T
- Part No.:
- SMCG170A-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG170A-E3/57T.pdf
- Description:
- TVS DIODE 170VWM 275VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,610
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Product details
Overview
SMCG170A-E3/57T from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in the SMCG (DO-215AB) surface-mount package, designed for high-energy surge protection with a 170 V stand-off voltage (VWM), 189–209 V breakdown voltage (VBR), and 275 V clamping voltage (VC) at 5.5 A peak pulse current (IPPM). It delivers 1500 W peak pulse power (10/1000 μs waveform) and is AEC-Q101 qualified for automotive electronics protection.
For engineers reviewing the SMCG170A-E3/57T datasheet, SMCG170A-E3/57T pinout, SMCG170A-E3/57T application, or SMCG170A-E3/57T equivalent, this device is selected for robust overvoltage clamping in DC power rails, sensor interfaces, and automotive control modules where fast response (<1 ns), low incremental surge resistance, and stable clamping under repetitive transients are critical.
Technical Context
The SMCG170A-E3/57T uses a glass-passivated silicon junction optimized for transient suppression in unidirectional configurations. Its thermal resistance (RθJA = 75 °C/W) and junction-to-lead resistance (RθJL = 15 °C/W) support reliable operation up to TJ = +150 °C, with derating above TA = 25 °C per Figure 2 of the datasheet.
It complies with ANSI/IEEE C62.35 for surge testing and meets UL 497B recognition (QVGQ2) for protector classification. The device is rated for 200 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine) and exhibits <1000 μA reverse leakage (ID) at VWM = 170 V - confirming tight voltage tolerance and low standby power loss.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 170 V - maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin for 12 V–48 V systems with headroom for ripple and tolerance. |
| VBR (min/max) | 189 V / 209 V at IT = 1.0 mA - precise breakdown threshold ensures predictable turn-on during transients without premature conduction. |
| VC @ IPPM | 275 V at 5.5 A (10/1000 μs) - clamping voltage limits downstream IC stress; enables protection of 200–250 V-rated components. |
| PPPM | 1500 W - peak surge energy handling capacity supports IEC 61000-4-5 Level 4 (4 kV/2 Ω) compliance when properly laid out. |
| TJ max. | +150 °C - extended junction temperature rating allows deployment in under-hood automotive environments and industrial enclosures. |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness per AEC standard. |
| Package | SMCG (DO-215AB) - low-profile SMD outline with matte tin-plated leads, MSL Level 1, compatible with automated reflow (peak 260 °C). |
Pinout & Package
SMCG170A-E3/57T is housed in the SMCG (DO-215AB) surface-mount package: a gull-wing leaded case with cathode band marking on the anode-side terminal. Dimensions are 7.87 mm × 10.16 mm × 2.41 mm (L × W × H); terminals are solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to protected line (e.g., battery rail or signal source) | Accepts surge current during clamping; must be routed with low-inductance path to ground reference. |
| Cathode | Current exit point in forward bias; marked by band; connected to system ground or low-impedance return | Serves as clamping reference node; requires direct, wide copper pour connection to minimize VC rise during surge. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated chip junction | Ensures stable VBR over lifetime and immunity to moisture-induced parameter drift in humid environments. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a), improving clamping fidelity. |
| Very fast response time (<1 ns) | Activates before sensitive downstream circuitry (e.g., MCU I/O, CAN transceivers) sustains damage from ESD or load dump. |
| MSL Level 1, peak reflow 260 °C | Enables single-pass assembly with standard lead-free reflow profiles without preconditioning or baking. |
| UL 497B recognized (QVGQ2) | Validates suitability for telecom and industrial equipment requiring certified surge protection per safety standards. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V supply lines in engine control units (ECUs) against load dump transients (ISO 16750-2, up to 60 V for 400 ms). IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and local regulator input to clamp surges before LDO or DC/DC converter. Use Value: With VWM = 170 V and VC = 275 V, SMCG170A-E3/57T avoids conduction during normal operation while limiting peak rail voltage to safe levels during 12 V system load dump events. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) in factory automation PLC modules from EFT and surge coupling on long cables. IC Role / Device Role / Timing Role: TVS mounted at connector entry point, shunting transients to chassis ground before signal conditioning amplifier. Use Value: Sub-1 ns response and 275 V clamping ensure sensor front-end ICs (e.g., instrumentation amplifiers) remain within absolute maximum ratings during 4 kV EFT bursts. |
| Telecom DC Feeder Protection | Renewable Energy Inverter Control Board |
Use Scenario: Safeguarding -48 V DC power feeds in central office equipment exposed to lightning-induced surges on outdoor plant wiring. IC Role / Device Role / Timing Role: Primary clamping device on input stage of DC/DC converter powering telecom line cards. Use Value: 1500 W PPPM and AEC-Q101 qualification provide field-proven reliability for telco infrastructure operating continuously at elevated ambient temperatures. |
Use Scenario: Protecting gate drivers and microcontroller I/O on solar inverter control boards from switching noise and grid fault transients. IC Role / Device Role / Timing Role: TVS on isolated 15 V auxiliary supply rail feeding optocoupler inputs and PWM logic. Use Value: Tight VBR tolerance (±5.5%) and low ID (<1 μA) prevent quiescent current increase or false triggering in high-impedance control circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ170A-E3/57T | Same VWM (170 V), but lower PPPM (400 W) and higher VC (277 V); SMA package (DO-214AC), smaller footprint. | Limited to lower-energy transients (IEC 61000-4-5 Level 2); unsuitable for automotive load dump or telecom feeder duty. | Select SMAJ170A-E3/57T only for space-constrained consumer or industrial designs with verified lower surge exposure. |
| SMCJ170A-E3/57T | Same VWM and VC, but higher PPPM (1500 W) and identical DO-214AB package; slightly wider VBR range (189–221 V). | Offers same protection level but with broader breakdown tolerance; not AEC-Q101 qualified. | Choose SMCJ170A-E3/57T for cost-sensitive industrial applications where automotive qualification is unnecessary. |
Compared with SMCG170A-E3/57T, SMAJ170A-E3/57T trades surge capacity for size, while SMCJ170A-E3/57T matches performance but lacks AEC-Q101 validation - making SMCG170A-E3/57T the sole choice for production automotive ECUs requiring both high energy handling and qualification traceability.
Availability
SMCG170A-E3/57T is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and telecom DC feeder surge suppression requiring stable component supply across multi-year production cycles.
Supply support for SMCG170A-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, precision, and application-specific optimization.
The SMCG series is engineered for high-power transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where AEC-Q101 compliance, low clamping overshoot, and long-term parametric stability are mandatory.
FAQ
What is the clamping voltage of SMCG170A-E3/57T at its rated peak pulse current?
The SMCG170A-E3/57T has a maximum clamping voltage (VC) of 275 V when subjected to its specified peak pulse current (IPPM) of 5.5 A using the 10/1000 μs waveform. This value is measured under standardized test conditions with 0.31" × 0.31" copper pads per terminal and represents the upper voltage limit imposed on protected circuitry during surge events. The SMCG170A-E3/57T maintains this clamping performance consistently across its operational temperature range.
Is SMCG170A-E3/57T suitable for bidirectional transient protection?
No, SMCG170A-E3/57T is a unidirectional transient voltage suppressor, indicated by the "A" suffix (not "CA"). It conducts only in reverse bias and requires correct polarity placement - cathode connected to the protected line, anode to ground. For bidirectional protection, Vishay offers SMCG170CA-E3/57T, which provides symmetrical clamping in both directions. Using SMCG170A-E3/57T in a bidirectional configuration risks failure during positive-going transients.
Does SMCG170A-E3/57T meet automotive qualification standards?
Yes, SMCG170A-E3/57T is AEC-Q101 qualified, as confirmed in the Vishay datasheet (Document Number: 88457, Revision: 09-Jan-2024). This qualification covers stress tests including high-temperature reverse bias, temperature cycling, and accelerated life testing - validating its suitability for under-hood and body-control module applications. The "HE3" variant (e.g., SMCG170AHE3/57T) explicitly denotes AEC-Q101 compliance, but the base SMCG170A-E3/57T also carries this qualification per Vishay's ordering information footnote (1).
What is the thermal resistance of SMCG170A-E3/57T, and how does it affect layout design?
The SMCG170A-E3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead resistance (RθJL) of 15 °C/W. These values assume mounting on 0.31" × 0.31" copper pads per terminal. To maintain TJ ≤ 150 °C under full 1500 W surge duty, PCB layout must maximize copper area and thermal vias beneath both terminals. Reducing pad size or omitting thermal relief increases RθJA, risking thermal runaway during repetitive surges - a key design constraint for the SMCG170A-E3/57T.
Can SMCG170A-E3/57T be used in place of older SMAJ or SMCJ series parts?
SMCG170A-E3/57T is not a direct drop-in replacement for SMAJ170A or SMCJ170A due to package differences: SMCG uses DO-215AB (gull-wing), while SMAJ uses DO-214AC and SMCJ uses DO-214AB. Though all share similar electrical specs, the SMCG170A-E3/57T requires updated stencil and placement files. Its AEC-Q101 qualification and tighter VBR tolerance (189–209 V vs. 189–221 V for SMCJ) make it preferable for new automotive designs, but legacy board reuse mandates mechanical verification before substitution.
SMCG170A-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):
- 170V
- Voltage - Breakdown (Min):
- 189V
- Voltage - Clamping (Max) @ Ipp:
- 275V
- Current - Peak Pulse (10/1000µs):
- 5.5A
- 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)
SMCG170A-E3/57T FAQ
1.How can I place an order for SMCG170A-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG170A-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 SMCG170A-E3/57T reliable?
The price and inventory of SMCG170A-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 SMCG170A-E3/57T is usually 5 days.
3.What payment methods are accepted for SMCG170A-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG170A-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG170A-E3/57T?
SMCG170A-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG170A-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 SMCG170A-E3/57T?
For technical support, including SMCG170A-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG170A-E3/57T requirements.
6.How does Aetrix verify that SMCG170A-E3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG170A-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 SMCG170A-E3/57T meets industry standards.
7.What is the process for return or replacement of SMCG170A-E3/57T?
All SMCG170A-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG170A-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 SMCG170A-E3/57T part is unused and in its original packaging.
Return procedure for SMCG170A-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG170A-E3/57T Tags
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