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Vishay General Semiconductor - Diodes Division SMCG85CA-E3/57T
- Part No.:
- SMCG85CA-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG85CA-E3/57T.pdf
- Description:
- TVS DIODE 85VWM 137VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,998
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Product details
Overview
SMCG85CA-E3/57T from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) in the SMCG (DO-215AB) package, rated for 85 V stand-off voltage (VWM), 1500 W peak pulse power (PPPM), and clamping voltage of 137 V at 10.9 A IPPM under 10/1000 µs waveform. It features AEC-Q101 qualification, glass passivated junction, and UL 94 V-0 molding compound - designed for automotive and industrial circuit protection against inductive switching transients and ESD.
For engineers reviewing the SMCG85CA-E3/57T datasheet, SMCG85CA-E3/57T pinout, SMCG85CA-E3/57T application, or SMCG85CA-E3/57T equivalent, this page delivers verified electrical parameters, bidirectional clamping behavior, thermal resistance (RθJA = 75 °C/W), JEDEC-compliant surge ratings, and AEC-Q101 qualification status - all critical for robust overvoltage protection design in automotive ECUs and sensor interfaces.
Technical Context
This bidirectional TVS diode operates symmetrically across both polarities, with breakdown voltage (VBR) specified at 94.4–104 V (min/max) at 1 mA test current, and clamps to ≤137 V at 10.9 A peak pulse current. Its low incremental surge resistance and fast response time enable effective suppression of transient energy without semiconductor latch-up or thermal runaway.
Designed for surface-mount assembly on 8.0 mm × 8.0 mm copper pads per terminal, it delivers 6.5 W steady-state power dissipation at TA = 50 °C and supports operating junction temperatures from –55 °C to +150 °C. The device meets J-STD-020 MSL Level 1 and JESD201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 85 V - maximum continuous reverse stand-off voltage before significant leakage; defines safe operating margin below clamping threshold |
| VBR (min/max) | 94.4 V / 104 V at 1 mA - guaranteed breakdown range ensuring consistent turn-on across production lots |
| VC @ IPPM | 137 V at 10.9 A - clamping voltage under standardized 10/1000 µs surge; determines protected circuit's maximum transient exposure |
| PPPM | 1500 W - peak pulse power handling capability; enables survival of high-energy transients like ISO 7637-2 Pulse 5a |
| RθJA | 75 °C/W - junction-to-ambient thermal resistance on recommended pad layout; informs derating above 25 °C ambient |
| TJ max. | +150 °C - maximum junction temperature; sets upper limit for thermal design in under-hood automotive environments |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC standard |
Pinout & Package
Package: SMCG (DO-215AB) - low-profile, gull-wing surface-mount package with matte tin-plated leads solderable per J-STD-002 and JESD22-B102; no polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive polarity) | One terminal of symmetrical PN junction; accepts surge current in either direction during clamping |
| Cathode | Transient current entry (negative polarity) | Second terminal of symmetrical PN junction; completes bidirectional conduction path with Anode |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body control, and ADAS modules requiring long-term field reliability |
| Glass passivated chip junction | Improves moisture resistance and long-term stability of breakdown voltage under thermal cycling |
| UL 94 V-0 molding compound | Ensures flame retardancy in enclosed automotive enclosures and industrial control cabinets |
| MSL Level 1 rating | Permits unlimited floor life and reflow at 260 °C peak without baking - simplifies SMT manufacturing flow |
Applications
| Automotive Power Supply Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-supplied microcontrollers and CAN transceivers from load-dump and jump-start transients. IC Role / Device Role / Timing Role: Bidirectional TVS placed at power input stage to clamp surges before LDOs or DC-DC converters. Use Value: Withstands 1500 W pulses and clamps to 137 V, preventing damage to downstream 3.3 V/5 V logic while meeting ISO 16750-2 requirements. |
Use Scenario: Safeguarding analog outputs (e.g., 4–20 mA loops) and digital I/Os of PLC analog input modules from field wiring transients. IC Role / Device Role / Timing Role: Placed across signal and ground to suppress EFT bursts and inductive kickback from solenoid drivers. Use Value: Low clamping voltage (137 V) and fast response ensure sensor signal integrity remains intact during 1 kV/50 Ω EFT events. |
| Automotive Lighting Control | Telecom Line Interface Protection |
Use Scenario: Shielding LED driver ICs and MOSFET gate drivers in adaptive front lighting systems (AFS) from inductive switching spikes. IC Role / Device Role / Timing Role: Mounted directly at driver output to absorb flyback energy from high-current LED strings. Use Value: 1500 W PPPM rating handles repetitive 100 A surge currents from PWM-driven inductive loads without degradation. |
Use Scenario: Protecting Ethernet PHYs and RS-485 transceivers in outdoor telecom equipment exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Installed on differential pairs (e.g., TX+/TX−) to provide common-mode and differential-mode transient suppression. Use Value: Symmetrical bidirectional clamping ensures equal protection regardless of surge polarity - critical for full-duplex data lines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ85CA | Same VWM (85 V) and PPPM (1500 W), but SMA (DO-214AC) package - larger footprint and higher RθJA (95 °C/W) | Less suitable for space-constrained automotive PCBs; requires larger thermal pads for equivalent thermal performance | Select SMAJ85CA only if legacy SMA layout exists and board rework is not feasible |
| SMCJ85CA | Higher PPPM (3000 W), same VWM (85 V), identical SMCG (DO-215AB) package - double surge capacity | Overqualified for most 12 V automotive applications; increases cost and may reduce system-level ESD margin due to higher capacitance | Choose SMCJ85CA when protecting against extreme transients like ISO 7637-2 Pulse 5b (500 V/2 Ω) where 1500 W is insufficient |
Compared with SMAJ85CA, SMCG85CA-E3/57T offers superior thermal performance and smaller footprint; versus SMCJ85CA, it provides optimal cost-performance balance for standard 12 V automotive surge immunity without over-engineering.
Availability
SMCG85CA-E3/57T is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and telecom infrastructure requiring stable component supply with AEC-Q101 assurance and RoHS compliance.
Supply support for SMCG85CA-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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The SMCG series was engineered specifically for high-reliability automotive and industrial transient suppression - combining AEC-Q101 validation, low-profile packaging, and precise bidirectional clamping for next-generation electronic control units.
FAQ
What is the clamping voltage of SMCG85CA-E3/57T and how is it measured?
The SMCG85CA-E3/57T has a maximum clamping voltage (VC) of 137 V, measured at 10.9 A peak pulse current (IPPM) using the standardized 10/1000 µs double-exponential surge waveform. This value is guaranteed across the full operating temperature range and reflects the actual voltage seen by protected circuitry during transient events - critical for verifying compatibility with downstream IC voltage tolerances.
Is SMCG85CA-E3/57T suitable for automotive applications?
Yes, SMCG85CA-E3/57T is AEC-Q101 qualified and explicitly designed for automotive use. It meets stringent requirements for temperature cycling, high-temperature reverse bias, and surge immunity - making it appropriate for engine control units, body electronics, lighting modules, and ADAS sensors where reliability under harsh conditions is mandatory.
How does the bidirectional configuration of SMCG85CA-E3/57T affect its circuit placement?
The bidirectional nature of SMCG85CA-E3/57T eliminates polarity sensitivity - it can be placed across any two nodes (e.g., signal–ground or power–ground) without regard to orientation. This simplifies layout, reduces BOM complexity, and avoids assembly errors common with unidirectional TVS devices, especially in differential or AC-coupled signal paths.
What is the thermal resistance of SMCG85CA-E3/57T and how does it impact PCB layout?
SMCG85CA-E3/57T 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 terminal. To maintain safe operation at elevated ambient temperatures, designers must replicate this pad area and ensure adequate copper pour - undersized pads will increase junction temperature and reduce surge endurance.
Does SMCG85CA-E3/57T meet RoHS and halogen-free requirements?
Yes, SMCG85CA-E3/57T carries the "E3" suffix, indicating RoHS compliance and industrial-grade qualification per Vishay's material categorization. It contains no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE, and conforms to JEDEC JS-001 ESD standards - fully compliant for use in environmentally regulated markets including EU and China RoHS.
SMCG85CA-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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 85V
- Voltage - Breakdown (Min):
- 94.4V
- Voltage - Clamping (Max) @ Ipp:
- 137V
- Current - Peak Pulse (10/1000µs):
- 10.9A
- 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)
SMCG85CA-E3/57T FAQ
1.How can I place an order for SMCG85CA-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG85CA-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 SMCG85CA-E3/57T reliable?
The price and inventory of SMCG85CA-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 SMCG85CA-E3/57T is usually 5 days.
3.What payment methods are accepted for SMCG85CA-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG85CA-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG85CA-E3/57T?
SMCG85CA-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG85CA-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 SMCG85CA-E3/57T?
For technical support, including SMCG85CA-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG85CA-E3/57T requirements.
6.How does Aetrix verify that SMCG85CA-E3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG85CA-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 SMCG85CA-E3/57T meets industry standards.
7.What is the process for return or replacement of SMCG85CA-E3/57T?
All SMCG85CA-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG85CA-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 SMCG85CA-E3/57T part is unused and in its original packaging.
Return procedure for SMCG85CA-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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