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Vishay General Semiconductor - Diodes Division SMCG8.5CA-E3/57T
- Part No.:
- SMCG8.5CA-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG8.5CA-E3/57T.pdf
- Description:
- TVS DIODE 8.5VWM 14.4VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,747
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Product details
Overview
SMCG8.5CA-E3/57T from Vishay General Semiconductor is a bidirectional 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, 1500 W peak pulse power (PPPM), and clamping voltage of 14.4 V at 20 A IPPM. It protects signal lines and power rails in automotive sensor interfaces against ESD and inductive switching transients.
For engineers reviewing the SMCG8.5CA-E3/57T datasheet, SMCG8.5CA-E3/57T pinout, SMCG8.5CA-E3/57T application, or SMCG8.5CA-E3/57T equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification, 1500 W surge capability with 10/1000 μs waveform, low clamping ratio (VC/VBR ≈ 1.45), and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
The SMCG8.5CA-E3/57T operates as a bidirectional avalanche diode, exhibiting symmetrical reverse/forward conduction above its breakdown threshold in both directions. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<1.0 μA at VWM), while MSL Level 1 rating supports lead-free reflow up to 260 °C peak.
Thermal performance is defined by RθJA = 75 °C/W and RθJL = 15 °C/W, enabling reliable operation up to TJ = +150 °C. The device meets UL 497B recognition (QVGQ2) and complies with ANSI/IEEE C62.35 for surge protector classification - critical for automotive and industrial safety-critical signal line protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - maximum continuous reverse voltage before clamping begins; sets operating margin for 12 V automotive signal lines. |
| VBR (min/max) | 9.44 V / 10.4 V at IT = 1 mA - tight 5% tolerance ensures predictable turn-on across temperature and unit variation. |
| VC @ IPPM | 14.4 V at 20 A (10/1000 μs) - low clamping voltage limits stress on downstream ICs like CAN transceivers or ADC front-ends. |
| PPPM | 1500 W - high surge power rating enables single-device protection against ISO 7637-2 Pulse 1/2a/5a transients in vehicle ECUs. |
| ID @ VWM | <1.0 μA - ultra-low leakage preserves battery life in always-on sensor nodes and avoids false triggering. |
| TJ max | +150 °C - supports under-hood automotive deployment without derating in ambient up to +125 °C. |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including HTOL, TCT, and ESD HBM ≥ 8 kV. |
Pinout & Package
Package: DO-215AB (SMCG) - surface-mount gull-wing package with matte tin-plated leads, 0.220–0.245 inch body length, 0.115–0.125 inch width, and 0.024–0.040 inch lead thickness per Vishay spec. No polarity marking on bidirectional variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional current path | No polarity - either terminal serves as anode or cathode depending on transient polarity; eliminates orientation errors during placement. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive electronics including engine control, ADAS sensors, and body modules - no additional qualification testing required. |
| 1500 W peak pulse power | Withstands repetitive ISO 7637-2 Pulse 5a (50 V, 100 ms) surges when mounted on 8 mm × 8 mm copper pads - reduces need for parallel devices. |
| MSL Level 1, 260 °C peak | Compatible with standard lead-free reflow profiles without pre-baking - lowers manufacturing cost and cycle time. |
| Glass-passivated junction | Ensures long-term VBR stability over 1000+ thermal cycles and prevents parameter drift in humid environments. |
| UL 497B recognition (QVGQ2) | Meets safety agency requirements for telecom and industrial equipment - accelerates end-product certification. |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting LIN/CAN transceiver I/O pins in door module ECUs exposed to load dump and ESD events. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector entry point to shunt transients before reaching PHY layer. Use Value: Clamps 20 A surge to ≤14.4 V, preserving transceiver integrity without adding series impedance or propagation delay. |
Use Scenario: Shielding RS-485/CAN FD differential pairs in factory automation PLCs from motor drive noise and ground bounce. IC Role / Device Role / Timing Role: Low-capacitance (≈100 pF) TVS pair across A/B lines to suppress common-mode surges while maintaining signal integrity at 5 Mbps. Use Value: Symmetrical clamping ensures equal protection on both lines, preventing data corruption during ±15 kV contact ESD events. |
| Consumer IoT Power Input | Telecom DC Power Feeds |
Use Scenario: Safeguarding USB-C PD input stage in smart home hubs against hot-plug transients and lightning-induced surges. IC Role / Device Role / Timing Role: Primary-level TVS on VBUS rail upstream of buck converter, rated for 1500 W unidirectional-equivalent energy handling. Use Value: Withstands 10/1000 μs surges up to 20 A without degradation, eliminating need for secondary crowbar circuits. |
Use Scenario: Protecting -48 V DC power inputs in telecom base station remote radio units (RRUs) from induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Bidirectional clamp on supply rail referenced to chassis ground, compliant with IEC 61000-4-5 Level 4 (4 kV) Use Value: 8.5 V VWM allows safe operation during brownout conditions while clamping 1500 W surges to <15 V - within silicon-safe margin for PMICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ8.5CA | Same VWM/VBR/PPPM specs but SMA (DO-214AC) package - larger footprint (4.5 mm × 2.7 mm vs. SMCG's 6.2 mm × 3.2 mm), higher RθJA (110 °C/W). | Limited to non-AEC-Q101 designs; unsuitable for space-constrained automotive PCBs requiring DO-215AB mounting. | Select SMAJ8.5CA only if legacy layout reuse or lower-cost procurement outweighs thermal and space advantages of SMCG8.5CA-E3/57T. |
| TPSMD8.5CA | Identical electrical specs and AEC-Q101 rating, but in SOD-123FL package - smaller size (2.7 mm × 1.7 mm), lower PPPM (600 W), and no UL recognition. | Acceptable for consumer-grade low-energy surges but fails ISO 7637-2 Pulse 5a compliance due to reduced surge capacity. | Choose TPSMD8.5CA only for cost-sensitive, non-automotive applications where 600 W surge rating suffices and board space is extremely limited. |
Compared with SMAJ8.5CA and TPSMD8.5CA, the SMCG8.5CA-E3/57T delivers superior thermal performance (RθJA = 75 °C/W), automotive-grade reliability (AEC-Q101 + UL 497B), and optimal footprint-to-power ratio - making it the preferred choice for next-generation automotive and industrial controllers requiring robust, certified surge immunity.
Availability
SMCG8.5CA-E3/57T is available at Aetrix Electronics and suitable for automotive sensor modules, industrial CAN networks, and telecom DC power feeds requiring stable component supply, AEC-Q101 assurance, and 1500 W transient immunity.
Supply support for SMCG8.5CA-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, efficiency, and automotive-grade qualification.
The SMCG series was engineered specifically for high-power, space-constrained transient suppression in automotive and industrial systems - combining DO-215AB mechanical robustness with AEC-Q101 validation and UL safety recognition.
FAQ
What is the clamping voltage of SMCG8.5CA-E3/57T at its rated peak pulse current?
The SMCG8.5CA-E3/57T has a maximum clamping voltage (VC) of 14.4 V when subjected to a 10/1000 μs waveform peak pulse current (IPPM) of 20 A. This value is measured under standardized test conditions with the device mounted on 8.0 mm × 8.0 mm copper pads per JEDEC standards, ensuring repeatable performance in production layouts.
Is SMCG8.5CA-E3/57T suitable for automotive applications requiring AEC-Q101 qualification?
Yes, SMCG8.5CA-E3/57T is explicitly AEC-Q101 qualified per the Vishay datasheet (Document Number: 88457, Revision: 09-Jan-2024). It has passed stress tests including high-temperature operating life, temperature cycling, and ESD HBM ≥ 8 kV - confirming suitability for under-hood and body-control module deployments.
Does SMCG8.5CA-E3/57T have polarity markings on the package?
No, SMCG8.5CA-E3/57T is a bidirectional device and carries no polarity marking. Its symmetrical construction means either terminal functions as anode or cathode depending on transient polarity - simplifying PCB layout and eliminating orientation-related assembly errors.
What is the maximum junction temperature rating for SMCG8.5CA-E3/57T?
The SMCG8.5CA-E3/57T has a maximum junction temperature (TJ max) of +150 °C. This rating enables reliable operation in high-ambient environments such as automotive engine compartments or industrial enclosures, provided thermal design follows Vishay's recommended 8.0 mm × 8.0 mm copper pad layout.
How does the SMCG8.5CA-E3/57T compare to unidirectional versions like SMCG8.5A-E3/57T in circuit implementation?
Unlike the unidirectional SMCG8.5A-E3/57T - which requires correct cathode orientation and only clamps negative transients - the SMCG8.5CA-E3/57T provides symmetrical protection for both polarities without directional constraints. This makes it ideal for AC-coupled or differential signal lines where transient polarity cannot be predicted, such as CAN bus or audio interfaces.
SMCG8.5CA-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):
- 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)
SMCG8.5CA-E3/57T FAQ
1.How can I place an order for SMCG8.5CA-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG8.5CA-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 SMCG8.5CA-E3/57T reliable?
The price and inventory of SMCG8.5CA-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 SMCG8.5CA-E3/57T is usually 5 days.
3.What payment methods are accepted for SMCG8.5CA-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG8.5CA-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG8.5CA-E3/57T?
SMCG8.5CA-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG8.5CA-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 SMCG8.5CA-E3/57T?
For technical support, including SMCG8.5CA-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG8.5CA-E3/57T requirements.
6.How does Aetrix verify that SMCG8.5CA-E3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG8.5CA-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 SMCG8.5CA-E3/57T meets industry standards.
7.What is the process for return or replacement of SMCG8.5CA-E3/57T?
All SMCG8.5CA-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG8.5CA-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 SMCG8.5CA-E3/57T part is unused and in its original packaging.
Return procedure for SMCG8.5CA-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG8.5CA-E3/57T Tags
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