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Vishay General Semiconductor - Diodes Division SMCG85CAHE3/9AT
- Part No.:
- SMCG85CAHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG85CAHE3/9AT.pdf
- Description:
- TVS DIODE 85VWM 137VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,600
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Product details
Overview
SMCG85CAHE3/9AT 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 SMCG85CAHE3/9AT datasheet, SMCG85CAHE3/9AT pinout, SMCG85CAHE3/9AT application, or SMCG85CAHE3/9AT equivalent, key selection criteria include bidirectional clamping capability, low incremental surge resistance, MSL Level 1 reflow compatibility, RoHS compliance, and suitability for high-energy transients on power rails and signal lines in harsh environments.
Technical Context
This device operates as a voltage-clamped shunt protector, responding within picoseconds to transients exceeding its breakdown threshold (VBR min = 94.4 V, max = 104 V at 1 mA). Its bidirectional symmetry ensures identical clamping behavior in both polarities, eliminating polarity concerns in AC-coupled or floating interfaces.
Thermal design is supported by RθJA = 75 °C/W and RθJL = 15 °C/W, with derating above TA = 25 °C per Figure 2. The glass-passivated junction and matte tin-plated leads meet J-STD-002/JESD 22-B102 solderability standards and JESD 201 Class 2 whisker resistance requirements.
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 - guaranteed breakdown range defining turn-on threshold |
| VC @ IPPM | 137 V at 10.9 A - clamped voltage during 10/1000 μs surge, limiting stress on downstream ICs |
| PPPM | 1500 W - peak transient energy absorption capacity under standardized waveform |
| TJ max. | +150 °C - maximum junction temperature enabling operation in under-hood automotive environments |
| Package | SMCG (DO-215AB) - surface-mount gull-wing package with 8.0 mm × 8.0 mm copper pad thermal requirement |
| AEC-Q101 | Qualified - validated for automotive electronic systems per stress test requirements |
Pinout & Package
SMCG85CAHE3/9AT uses the SMCG (DO-215AB) surface-mount package: low-profile gull-wing leads, no polarity marking (bidirectional), matte tin plating, UL 94 V-0 molding compound, and MSL Level 1 rating (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive half-cycle) | One terminal of symmetrical PN junction; conducts when voltage exceeds +VBR |
| Cathode | Transient current entry (negative half-cycle) | Other terminal of symmetrical PN junction; conducts when voltage exceeds –VBR |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR and VC performance in both directions eliminates need for polarity-aware layout |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 pulses) |
| Glass-passivated chip junction | Enhances long-term reliability and stability under repeated surge stress |
| MSL Level 1 rating | Enables standard SMT reflow without moisture sensitivity handling precautions |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body control, and ADAS subsystems |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump and alternator ripple transients per ISO 16750-2. IC Role / Device Role / Timing Role: Shunt clamping device placed across input rail to divert surge current away from DC-DC converters and microcontrollers. Use Value: Withstands 1500 W surges and clamps to ≤137 V, preventing damage to 3.3 V/5 V logic and analog front-ends downstream. | Use Scenario: Safeguarding RS-485/RS-422 transceivers in factory automation I/O modules exposed to ESD and inductive switching noise. IC Role / Device Role / Timing Role: Bidirectional line protector on differential bus pairs, absorbing ±15 kV contact ESD and 1 kV ring wave surges. Use Value: Symmetrical clamping ensures equal protection on both A and B lines without polarity constraints, preserving signal integrity. |
| Consumer Device USB Port Protection | Telecom Base Station DC Feed Protection |
Use Scenario: Shielding USB 2.0 data lines and VBUS in portable docking stations from ESD and hot-swap transients. IC Role / Device Role / Timing Role: Low-capacitance TVS placed adjacent to connector, clamping transients before they reach USB PHY ICs. Use Value: Fast response time and 137 V clamping prevent latch-up or gate oxide damage in USB controllers during human-body-model events. | Use Scenario: Protecting PoE-powered remote radio units (RRUs) fed via 48 V DC from lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary-stage shunt protector on DC input before DC-DC isolation stage, handling high-energy common-mode transients. Use Value: 1500 W PPPM rating enables survival of 10/1000 μs lightning surges up to 10.9 A, maintaining system uptime in harsh RF environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ85CA | Same VWM (85 V) and PPPM (1500 W), but SMA (DO-214AC) package with higher RθJA (100 °C/W) and no AEC-Q101 qualification | Limited to industrial/commercial use; not suitable for automotive under-hood deployment | Select SMAJ85CA only if AEC-Q101 is not required and board space allows larger SMA footprint |
| SMCJ85CA | Same VWM and PPPM, but SMC (DO-214AB) package with higher thermal mass and RθJA = 40 °C/W; AEC-Q101 qualified | Better thermal performance but larger footprint (7.11 mm × 6.22 mm vs. SMCG's 5.59 mm × 3.17 mm) | Choose SMCJ85CA when higher sustained surge duty cycle or lower thermal resistance is critical and PCB area permits |
Compared with SMAJ85CA and SMCJ85CA, SMCG85CAHE3/9AT delivers AEC-Q101 qualification in the smallest DO-215AB footprint while maintaining full 1500 W surge capability-making it optimal for space-constrained automotive and portable industrial designs where thermal and reliability margins must coexist.
Availability
SMCG85CAHE3/9AT is available at Aetrix Electronics and suitable for automotive ECU power rails, industrial sensor interfaces, consumer USB port protection, and telecom DC feed circuits requiring stable component supply and long-term lifecycle support.
Supply support for SMCG85CAHE3/9AT 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 is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in automotive, industrial, and communications infrastructure where compact size, AEC-Q101 compliance, and repeatable clamping performance are mandatory.
FAQ
What does the "HE3" suffix indicate in SMCG85CAHE3/9AT?
The "HE3" suffix denotes RoHS-compliant construction with AEC-Q101 qualification. Specifically, "H" indicates AEC-Q101 qualification, "E3" confirms RoHS compliance and industrial-grade reliability. This distinguishes SMCG85CAHE3/9AT from non-automotive variants like SMCG85CA-E3/9AT (RoHS but not AEC-Q101 qualified). The SMCG85CAHE3/9AT meets automotive stress testing requirements including temperature cycling, humidity bias, and mechanical shock.
Is SMCG85CAHE3/9AT unidirectional or bidirectional?
SMCG85CAHE3/9AT is a bidirectional transient voltage suppressor. As confirmed by the "CA" suffix in its part number and documented in Vishay's datasheet (Document Number 88457), it provides symmetrical clamping in both polarities-identical breakdown and clamping characteristics for positive and negative transients. This eliminates polarity marking on the device and simplifies layout for AC-coupled or floating signal paths.
What is the minimum recommended PCB pad layout for SMCG85CAHE3/9AT?
Vishay specifies a minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pad area for each terminal to achieve rated thermal and surge performance. This pad size ensures adequate heat dissipation during 10/1000 μs transients and supports the specified RθJA = 75 °C/W. Deviating below this size reduces PPPM derating and may cause premature failure under repeated surge conditions. The SMCG85CAHE3/9AT datasheet Figure 2 provides exact thermal derating curves based on this layout.
Does SMCG85CAHE3/9AT meet JEDEC MSL Level 1 requirements?
Yes, SMCG85CAHE3/9AT meets MSL Level 1 per J-STD-020, with a maximum peak reflow temperature of 260 °C. This allows direct placement into standard lead-free SMT reflow profiles without dry-packaging or baking. The qualification is explicitly stated in the "Mechanical Data" section of the Vishay datasheet (88457, Rev. 09-Jan-2024), confirming suitability for high-volume automated assembly without moisture sensitivity handling overhead.
What is the clamping voltage of SMCG85CAHE3/9AT at its rated peak pulse current?
The clamping voltage (VC) of SMCG85CAHE3/9AT is 137 V at its rated peak pulse current (IPPM) of 10.9 A, measured under the standard 10/1000 μs double-exponential waveform. This value is guaranteed across temperature and production lot, and defines the maximum voltage imposed on protected circuitry during a full-rated surge event. It is directly listed in the Electrical Characteristics table for SMCG85A/SMCG85CA in Vishay's datasheet (88457, page 2).
SMCG85CAHE3/9AT 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)
SMCG85CAHE3/9AT FAQ
1.How can I place an order for SMCG85CAHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG85CAHE3/9AT 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 SMCG85CAHE3/9AT reliable?
The price and inventory of SMCG85CAHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG85CAHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG85CAHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG85CAHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG85CAHE3/9AT?
SMCG85CAHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG85CAHE3/9AT 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 SMCG85CAHE3/9AT?
For technical support, including SMCG85CAHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG85CAHE3/9AT requirements.
6.How does Aetrix verify that SMCG85CAHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG85CAHE3/9AT 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 SMCG85CAHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG85CAHE3/9AT?
All SMCG85CAHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG85CAHE3/9AT, 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 SMCG85CAHE3/9AT part is unused and in its original packaging.
Return procedure for SMCG85CAHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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