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Vishay General Semiconductor - Diodes Division SMCG85CAHE3/57T
- Part No.:
- SMCG85CAHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG85CAHE3/57T.pdf
- Description:
- TVS DIODE 85VWM 137VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,288
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Product details
Overview
SMCG85CAHE3/57T from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in the SMCG (DO-215AB) package, designed for robust overvoltage protection of sensitive electronics. It features a 85 V stand-off voltage (VWM), 1500 W peak pulse power (PPPM), clamping voltage of 137 V at 10.9 A IPPM, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SMCG85CAHE3/57T datasheet, SMCG85CAHE3/57T pinout, SMCG85CAHE3/57T application, or SMCG85CAHE3/57T equivalent, key selection criteria include bidirectional clamping behavior, low incremental surge resistance, MSL Level 1 moisture sensitivity, RoHS-compliant matte tin terminals, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
This device operates as a voltage-clamped shunt protector using an avalanche breakdown mechanism. Its bidirectional symmetry ensures identical electrical characteristics in both polarities - VBR min/max = 94.4 V / 104 V at 1 mA IT, ID ≤ 1.0 μA at VWM, and VC = 137 V under 10/1000 μs surge conditions.
The SMCG85CAHE3/57T integrates glass-passivated junction technology and meets UL 94 V-0 flammability requirements. Thermal performance is defined by RθJA = 75 °C/W and RθJL = 15 °C/W, with TJ max = +150 °C and operation down to –55 °C, supporting harsh-environment deployment without derating below 25 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 85 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR (min/max) | 94.4 V / 104 V at 1 mA - Ensures reliable breakdown onset within tight tolerance band |
| VC @ IPPM | 137 V at 10.9 A - Clamping voltage during 10/1000 μs surge defines protected circuit stress level |
| PPPM | 1500 W - Peak surge energy handling capacity per single transient event |
| ID @ VWM | ≤ 1.0 μA - Ultra-low leakage preserves signal integrity in high-impedance lines |
| TJ Range | –55 °C to +150 °C - Enables use in under-hood automotive, industrial motor drives, and outdoor telecom |
| MSL Level | Level 1 (per J-STD-020) - Supports standard reflow without dry-pack or baking requirements |
Pinout & Package
Package: SMCG (DO-215AB) - Surface-mount, low-profile gull-wing leaded case with 0.220"–0.245" body width, 0.024"–0.040" lead thickness, and 0.115"–0.125" lead span. Matte tin-plated terminals comply with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; common terminal in bidirectional configuration | No polarity marking - symmetrical bidirectional operation eliminates cathode/anode orientation constraints during PCB layout |
| Cathode | Current exit point in forward bias; common terminal in bidirectional configuration | Identical to Anode electrically - terminals are interchangeable; no band marking required per spec |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and ADAS sensor interfaces |
| Glass-passivated junction | Enhances long-term stability and reduces parameter drift under thermal cycling and humidity stress |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients, improving protection margin for downstream ICs |
| UL 94 V-0 molding compound | Meets flame-retardancy requirements for safety-critical industrial and transportation systems |
| Automated placement compatibility | Gull-wing leads and standardized 57T tape-and-reel (850 pcs) support high-speed pick-and-place throughput |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting LIN/CAN bus nodes and power supply inputs in vehicle body control modules against load dump and inductive switching spikes. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed across power rail and ground, clamping surges before they reach MCU or transceiver ICs. Use Value: With 137 V clamping at 10.9 A and AEC-Q101 qualification, SMCG85CAHE3/57T maintains functional safety compliance while enabling compact layout near connectors. | Use Scenario: Safeguarding analog front-end inputs of pressure, temperature, and current sensors in PLC I/O modules exposed to field wiring transients. IC Role / Device Role / Timing Role: Bidirectional voltage clamp on differential or single-ended signal lines, suppressing ESD and lightning-induced surges up to 1500 W. Use Value: Symmetrical VBR (94.4–104 V) and <1.0 μA leakage ensure minimal impact on sensor accuracy and offset stability over temperature. |
| Telecom DC Power Feeding | Consumer Appliance Motor Drive Protection |
Use Scenario: Securing PoE-powered Ethernet switches and remote radio units against AC/DC converter turn-on surges and induced line noise. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 48 V DC input rails, coordinated with upstream fuses and secondary TVS arrays. Use Value: 85 V VWM aligns with IEEE 802.3bt Class 5–6 PoE voltage margins, while 1500 W PPPM handles worst-case fault energy without degradation. | Use Scenario: Shielding microcontroller GPIOs and gate drivers in washing machine and HVAC inverter boards from motor commutation spikes. IC Role / Device Role / Timing Role: Localized TVS at motor driver IC supply pins and feedback signal paths to prevent latch-up or false triggering. Use Value: DO-215AB footprint enables placement directly at connector or IC pad, reducing loop inductance and improving sub-100 ns response fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ85CA-E3/57T | Same VWM (85 V), lower PPPM (400 W), SMA (DO-214AC) package, higher RθJA (110 °C/W) | Limited to lower-energy transients; unsuitable for automotive load dump or industrial 2 kV surge testing | Select when cost or board space is constrained and surge energy remains below 400 W |
| SMCJ85CAHE3/57T | Same VWM (85 V), higher PPPM (3000 W), larger SMC (DO-214AB) package, same AEC-Q101 qualification | Required where IEC 61000-4-5 Level 4 (4 kV) immunity or repeated surge endurance is mandated | Choose when system-level surge testing exceeds 1500 W or thermal dissipation demands lower RθJA |
Compared with SMAJ85CA-E3/57T and SMCJ85CAHE3/57T, the SMCG85CAHE3/57T delivers optimal balance of automotive qualification, 1500 W surge capability, and compact DO-215AB footprint - making it ideal for space-constrained, high-reliability designs where full SMC-level ruggedness is unnecessary.
Availability
SMCG85CAHE3/57T is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, telecom power supplies, and consumer appliance motor controls requiring stable component supply across multi-year production cycles.
Supply support for SMCG85CAHE3/57T 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, efficiency, and application-specific optimization.
The SMCG series targets high-energy transient suppression in automotive and industrial environments, combining AEC-Q101 validation, low-profile packaging, and precise clamping performance for next-generation power and signal line protection.
FAQ
What is the clamping voltage of the SMCG85CAHE3/57T under standard 10/1000 µs surge conditions?
The SMCG85CAHE3/57T has a maximum clamping voltage (VC) of 137 V at 10.9 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This value is measured per JEDEC test conditions and defines the upper voltage limit imposed on protected circuits during transient events - critical for ensuring downstream ICs remain within absolute maximum ratings. The SMCG85CAHE3/57T achieves this with low incremental surge resistance inherent to its glass-passivated junction structure.
Is the SMCG85CAHE3/57T suitable for automotive applications?
Yes, the SMCG85CAHE3/57T is explicitly AEC-Q101 qualified and carries the HE3 suffix denoting halogen-free, RoHS-compliant, and automotive-grade construction. Its –55 °C to +150 °C operating range, MSL Level 1 rating, and validated performance under repetitive surge stress make it appropriate for engine control units, body electronics, and ADAS sensor interfaces. The SMCG85CAHE3/57T meets automotive board-level EMC requirements when applied per Vishay's recommended pad layout.
How does the bidirectional design of the SMCG85CAHE3/57T affect PCB layout?
The SMCG85CAHE3/57T has no polarity marking and exhibits identical VBR, VC, and ID characteristics in both directions - eliminating orientation constraints during placement. Unlike unidirectional TVS diodes, the SMCG85CAHE3/57T requires no cathode band alignment, simplifying automated assembly and reducing risk of misplacement. Its symmetrical terminals allow direct integration into AC-coupled or floating signal paths without additional blocking components.
What is the thermal resistance profile of the SMCG85CAHE3/57T, and how does it impact power dissipation?
The SMCG85CAHE3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead (RθJL) of 15 °C/W when mounted on 8.0 mm × 8.0 mm copper pads. This enables 6.5 W steady-state power dissipation at TA = 50 °C, but its primary function is transient suppression - not continuous power handling. For repeated surge events, thermal mass and PCB copper area dominate safe operation; the SMCG85CAHE3/57T's low RθJL supports rapid heat transfer to leads during short-duration pulses.
Does the SMCG85CAHE3/57T require special handling or moisture sensitivity precautions before soldering?
No - the SMCG85CAHE3/57T is rated MSL Level 1 per J-STD-020, meaning it may be stored indefinitely at ≤30 °C/85% RH and subjected to standard Pb-free reflow profiles (peak 260 °C) without baking or dry-pack requirements. Its DO-215AB package uses moisture-resistant molding compound meeting UL 94 V-0, and matte tin terminals ensure solderability per J-STD-002. This simplifies logistics and manufacturing for the SMCG85CAHE3/57T compared to higher-MSL alternatives.
SMCG85CAHE3/57T 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCG)
SMCG85CAHE3/57T FAQ
1.How can I place an order for SMCG85CAHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG85CAHE3/57T 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 SMCG85CAHE3/57T reliable?
The price and inventory of SMCG85CAHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG85CAHE3/57T is usually 5 days.
3.What payment methods are accepted for SMCG85CAHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG85CAHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG85CAHE3/57T?
SMCG85CAHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG85CAHE3/57T 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 SMCG85CAHE3/57T?
For technical support, including SMCG85CAHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG85CAHE3/57T requirements.
6.How does Aetrix verify that SMCG85CAHE3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG85CAHE3/57T 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 SMCG85CAHE3/57T meets industry standards.
7.What is the process for return or replacement of SMCG85CAHE3/57T?
All SMCG85CAHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG85CAHE3/57T, 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 SMCG85CAHE3/57T part is unused and in its original packaging.
Return procedure for SMCG85CAHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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