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Vishay General Semiconductor - Diodes Division SMCG8.5A-M3/57T
- Part No.:
- SMCG8.5A-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG8.5A-M3/57T.pdf
- Description:
- TVS DIODE 8.5VWM 14.4VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,885
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Product details
Overview
SMCG8.5A-M3/57T from Vishay General Semiconductor is a unidirectional surface-mount TransZORB® transient voltage suppressor in DO-215AB (SMCG) package, with 8.5 V stand-off voltage (VWM), 9.44–10.4 V breakdown voltage (VBR) at 1 mA, 14.4 V clamping voltage (VC) at 20 A peak pulse current, and 1500 W peak pulse power rating (10/1000 µs). It protects MOSFETs, ICs, and sensor signal lines in automotive and industrial power electronics.
For engineers reviewing the SMCG8.5A-M3/57T datasheet, SMCG8.5A-M3/57T pinout, SMCG8.5A-M3/57T application, or SMCG8.5A-M3/57T equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, halogen-free RoHS compliance, thermal resistance (RθJA = 75 °C/W), and real-world protection use cases for inductive switching transients.
Technical Context
This device operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology to achieve sub-nanosecond response time and low incremental surge resistance. Its clamping behavior is defined by a 10/1000 µs waveform test condition, with derating above 25 °C per Fig. 2 of the datasheet.
The SMCG8.5A-M3/57T uses a cathode-band-marked DO-215AB package with matte tin-plated leads compliant with J-STD-002 and JESD 22-B102. It meets MSL Level 1 (J-STD-020) and is qualified to AEC-Q101 for automotive underhood applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 9.44 V / 10.4 V at 1 mA - ensures reliable avalanche initiation within tight tolerance band |
| VC @ IPPM | 14.4 V at 20 A - limits transient voltage seen by protected downstream circuitry |
| PPPM | 1500 W (10/1000 µs) - sustains high-energy surges common in automotive load-dump and inductive kick scenarios |
| ID @ VWM | 1.0 µA - ultra-low leakage preserves signal integrity in high-impedance sensor interfaces |
| TJ max | +150 °C - supports operation in under-hood automotive environments and industrial motor drives |
| RθJA | 75 °C/W - defines thermal rise under PCB pad layout per datasheet recommendation (8.0 mm × 8.0 mm copper) |
Pinout & Package
Package: DO-215AB (SMCG), surface-mount gull-wing lead frame with cathode band marking on one end. Matte tin-plated terminals, MSL Level 1, halogen-free, RoHS-compliant (M3 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to ground or low-side reference in unidirectional TVS configurations |
| Cathode | Current exit terminal during forward conduction; marked with band | Connected to protected line (e.g., 12 V rail or sensor input) to clamp positive transients |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive underhood use including temperature cycling, humidity, and mechanical shock |
| Glass passivated junction | Enables stable VBR over lifetime and improved reliability vs. epoxy-passivated alternatives |
| Low profile DO-215AB package | 0.220–0.245 inch body length enables compact placement near IC power pins or connectors |
| Halogen-free (M3 suffix) | Complies with IEC 61249-2-21 and automotive OEM material restrictions |
| MSL Level 1 rating | Allows unlimited floor life and reflow up to 260 °C peak without preconditioning |
Applications
| Automotive Power Distribution | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V supply rails in body control modules against load-dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and local regulator input. Use Value: Clamps 14.4 V at 20 A to prevent overvoltage damage to LDOs and microcontrollers during ISO 7637-2 Pulse 5a events. |
Use Scenario: Shielding analog output lines of pressure or temperature sensors from ESD and cable discharge. IC Role / Device Role / Timing Role: Point-of-entry TVS on sensor harness connector side. Use Value: Sub-1 ns response and 1.0 µA leakage preserve millivolt-level signal fidelity while surviving ±15 kV contact ESD (IEC 61000-4-2). |
| Motor Drive Gate Driver Protection | Telecom DC Power Input Stage |
Use Scenario: Safeguarding high-side gate driver ICs from inductive flyback spikes during MOSFET turn-off. IC Role / Device Role / Timing Role: TVS connected between gate driver VDD and GND, adjacent to decoupling capacitor. Use Value: 1500 W peak power rating absorbs energy from fast-rising (<100 ns) transients without degradation across >10⁵ cycles. |
Use Scenario: Secondary-side surge suppression on -48 V telecom power feeds entering base station equipment. IC Role / Device Role / Timing Role: Unidirectional TVS on DC input before primary DC/DC converter stage. Use Value: 8.5 V VWM aligns with -48 V nominal systems using negative rail referencing; 14.4 V VC prevents upstream converter latch-up during ITU-T K.20 surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ8.5A-M3/57T | DO-214AC (SMA) package; 75 W lower PPPM (1425 W); RθJA = 85 °C/W | Lower power handling and higher thermal resistance limit use in high-repetition surge environments | Select when board space constraints favor SMA footprint and surge energy is ≤1425 W |
| SMCJ8.5A-M3/57T | DO-214AB (SMC) package; same 1500 W PPPM but larger footprint; RθJA = 50 °C/W | Better thermal performance allows sustained operation at higher ambient temperatures (>100 °C) | Prefer for under-hood automotive modules where junction temperature margin is critical |
Compared with SMCG8.5A-M3/57T, SMAJ8.5A-M3/57T trades compactness for reduced surge capacity, while SMCJ8.5A-M3/57T offers superior thermal management at the cost of PCB area - making SMCG8.5A-M3/57T optimal for space-constrained, AEC-Q101–required 1500 W protection.
Availability
SMCG8.5A-M3/57T is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface protection, and motor drive gate driver protection requiring stable component supply and full traceability.
Supply support for SMCG8.5A-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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with global manufacturing and testing infrastructure focused on reliability and automotive-grade validation.
The SMCG series targets high-power transient suppression in space-constrained, thermally demanding applications - specifically engineered for AEC-Q101 compliance and DO-215AB's optimized thermal-mechanical performance in automotive and industrial power systems.
FAQ
What is the clamping voltage of SMCG8.5A-M3/57T and how is it measured?
The clamping voltage (VC) of SMCG8.5A-M3/57T is 14.4 V, measured at 20 A peak pulse current using a 10/1000 µs waveform per ANSI/IEEE C62.35. This value reflects the maximum voltage imposed on the protected circuit during surge conditions and is validated per the datasheet's test methodology on standard 8.0 mm × 8.0 mm copper pads.
Is SMCG8.5A-M3/57T qualified for automotive applications?
Yes, SMCG8.5A-M3/57T is AEC-Q101 qualified, as confirmed in the Vishay document 88457 revision 09-Jan-2024. The M3 suffix denotes halogen-free, RoHS-compliant construction, and the device meets MSL Level 1 per J-STD-020 - making it suitable for under-hood automotive modules including body control units and engine management subsystems.
What does the "M3" suffix mean in SMCG8.5A-M3/57T?
The "M3" suffix in SMCG8.5A-M3/57T indicates halogen-free, RoHS-compliant, industrial-grade construction per Vishay's material categorization system. It specifies matte tin-plated leads meeting J-STD-002 solderability and JESD 22-B102 whisker resistance Class 2, distinguishing it from E3 (non-halogen-free RoHS) and HM3 (AEC-Q101 + halogen-free) variants.
How does SMCG8.5A-M3/57T differ from bidirectional versions like SMCG8.5CA?
SMCG8.5A-M3/57T is unidirectional with cathode band marking and specified for positive-transient suppression only; SMCG8.5CA is bidirectional, lacks polarity marking, and provides symmetrical clamping for AC-coupled or floating lines. Their VBR, VC, and PPPM ratings are identical, but circuit topology and grounding requirements differ fundamentally.
What is the thermal resistance of SMCG8.5A-M3/57T and why does it matter?
SMCG8.5A-M3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per the datasheet. This value directly determines allowable power dissipation at elevated ambient temperatures - critical for maintaining TJ ≤ 150 °C in automotive and industrial enclosures without forced cooling.
SMCG8.5A-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):
- 8.5V
- Voltage - Breakdown (Min):
- 9.44V
- Voltage - Clamping (Max) @ Ipp:
- 14.4V
- Current - Peak Pulse (10/1000µs):
- 104.2A
- 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)
SMCG8.5A-M3/57T FAQ
1.How can I place an order for SMCG8.5A-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG8.5A-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 SMCG8.5A-M3/57T reliable?
The price and inventory of SMCG8.5A-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 SMCG8.5A-M3/57T is usually 5 days.
3.What payment methods are accepted for SMCG8.5A-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG8.5A-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG8.5A-M3/57T?
SMCG8.5A-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG8.5A-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 SMCG8.5A-M3/57T?
For technical support, including SMCG8.5A-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG8.5A-M3/57T requirements.
6.How does Aetrix verify that SMCG8.5A-M3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG8.5A-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 SMCG8.5A-M3/57T meets industry standards.
7.What is the process for return or replacement of SMCG8.5A-M3/57T?
All SMCG8.5A-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG8.5A-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 SMCG8.5A-M3/57T part is unused and in its original packaging.
Return procedure for SMCG8.5A-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG8.5A-M3/57T Tags
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