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Vishay General Semiconductor - Diodes Division SMCG8.5CAHE3/9AT
- Part No.:
- SMCG8.5CAHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG8.5CAHE3/9AT.pdf
- Description:
- TVS DIODE 8.5VWM 14.4VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,260
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Product details
Overview
SMCG8.5CAHE3/9AT from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in the SMCG (DO-215AB) package, designed for robust overvoltage protection on signal and power lines. It features a 8.5 V stand-off voltage (VWM), 9.44–10.4 V breakdown voltage (VBR) at 1 mA, 1500 W peak pulse power (PPPM), 14.4 V clamping voltage (VC) at 20 A IPPM, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SMCG8.5CAHE3/9AT datasheet, SMCG8.5CAHE3/9AT pinout, SMCG8.5CAHE3/9AT application, or SMCG8.5CAHE3/9AT equivalent, this device is selected for high-energy transient suppression in automotive sensor interfaces, industrial I/O ports, and telecom line protection where bidirectional surge immunity, low clamping ratio, and MSL Level 1 reflow compatibility are critical.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical electrical characteristics in forward and reverse directions per J-STD-020 MSL Level 1 (260 °C peak). Its glass-passivated junction ensures stable VBR tolerance and low leakage (<1.0 μA at VWM), while the DO-215AB package delivers low thermal resistance (RθJL = 15 °C/W) for effective surge energy dissipation.
The device responds to 10/1000 μs transients with sub-nanosecond turn-on, clamping voltages defined at specified IPPM, and derated power capability above 25 °C per Figure 2. It meets UL 497B recognition (QVGQ2) and supports automated SMT placement with matte tin-plated leads compliant to J-STD-002 and JESD 22-B102.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - Maximum continuous operating voltage before clamping begins; sets system-level signal integrity margin. |
| VBR min/max | 9.44 V / 10.4 V at 1 mA - Tight breakdown window ensures predictable turn-on without premature conduction. |
| VC @ IPPM | 14.4 V at 20 A - Clamping voltage during 10/1000 μs surge; defines protected circuit's maximum stress level. |
| PPPM | 1500 W - Peak transient energy handling capacity; enables protection against IEC 61000-4-5 Level 4 surges. |
| ID @ VWM | ≤1.0 μA - Ultra-low leakage preserves signal integrity in high-impedance sensor or data lines. |
| TJ max | +150 °C - Extended junction temperature rating supports under-hood automotive and industrial environments. |
| AEC-Q101 | Qualified - Validated for automotive electronics per stress test requirements including HTOL, TCT, and ESD. |
Pinout & Package
Package: SMCG (DO-215AB) - surface-mount, low-profile gull-wing package with 2 terminals, UL 94 V-0 molding compound, and no polarity marking for bidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive half-cycle) | One of two symmetrical terminals; accepts surge current in either direction during clamping. |
| Cathode | Transient current entry (negative half-cycle) | Identical to Anode in bidirectional configuration; no functional distinction-device is fully symmetric. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional symmetry | Identical VBR, VC, and IPPM in both directions-enables single-device protection of AC-coupled or floating lines. |
| Glass-passivated junction | Stable parametric performance over life and temperature; eliminates risk of junction degradation under repeated surge stress. |
| MSL Level 1 rating | Compatible with standard lead-free reflow profiles up to 260 °C peak-no moisture sensitivity handling required. |
| UL 497B recognition | Validated for telecom and industrial protector applications-reduces certification burden in end equipment. |
| AEC-Q101 qualification | Meets automotive reliability standards including temperature cycling, HTRB, and ESD-suitable for ADAS sensors and body control modules. |
Applications
| Automotive Sensor Protection | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting CAN FD or LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional clamping element placed at connector interface to shunt transients before reaching sensitive IC inputs. Use Value: 14.4 V clamping at 20 A limits downstream voltage stress below 15 V, preserving 12 V rail integrity and enabling use of 16 V-rated interface ICs. | Use Scenario: Safeguarding PLC digital input channels exposed to inductive switching noise from solenoids and contactors. IC Role / Device Role / Timing Role: Primary surge arrestor on field-side traces, mounted adjacent to terminal block to minimize inductance. Use Value: 1500 W PPPM handles repetitive 1 kV/500 A surges per IEC 61000-4-5; low RθJL (15 °C/W) sustains performance across 85 °C ambient. |
| Telecom Line Interface | Consumer USB/Display Port ESD Protection |
Use Scenario: Shielding RS-485/RS-422 differential pairs in base station backhaul or network switch PHY interfaces. IC Role / Device Role / Timing Role: Common-mode TVS pair (one per line) referenced to ground, providing balanced transient suppression. Use Value: Symmetric VBR (±9.44–10.4 V) ensures equal clamping on both lines, maintaining common-mode rejection during fast transients. | Use Scenario: Secondary-level surge protection on HDMI, USB 2.0, or DisplayPort auxiliary channels in smart TVs and set-top boxes. IC Role / Device Role / Timing Role: Board-level TVS placed after primary ESD diodes to absorb higher-energy lightning-induced surges. Use Value: 1.0 μA ID at 8.5 V prevents signal attenuation on high-speed data lines; DO-215AB footprint allows compact layout near connectors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ8.5CA-E3/57T | Same VWM (8.5 V), lower PPPM (400 W), SMA (DO-214AC) package, non-AEC-Q101 | Limited to consumer/industrial use; insufficient for automotive surge levels | Select when cost-sensitive, non-automotive designs require smaller footprint but accept reduced surge rating. |
| SMCJ8.5CAHE3/9AT | Same VWM (8.5 V), higher PPPM (1500 W), SMC (DO-214AB) package, AEC-Q101 qualified | Higher thermal mass and RθJA (50 °C/W vs. 75 °C/W) requires larger pads for equivalent power handling | Choose when board space permits larger SMC package and higher steady-state power dissipation is needed. |
Compared with SMCG8.5CAHE3/9AT, SMAJ8.5CA-E3/57T offers lower cost and smaller size but sacrifices 73% peak power handling and automotive qualification; SMCJ8.5CAHE3/9AT matches surge capability and qualification but demands more PCB area and thermal management effort.
Availability
SMCG8.5CAHE3/9AT is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line protection requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMCG8.5CAHE3/9AT 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 targets high-reliability transient suppression in space-constrained, high-surge environments-designed specifically for automotive, industrial, and telecom systems demanding AEC-Q101 validation and UL recognition.
FAQ
What is the clamping voltage of SMCG8.5CAHE3/9AT at its rated peak pulse current?
The SMCG8.5CAHE3/9AT has a maximum clamping voltage (VC) of 14.4 V when subjected to its rated peak pulse current (IPPM) of 20 A under a 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuits during surge events. The low clamping ratio (VC/VWM ≈ 1.69) ensures effective protection of 12 V nominal systems.
Is SMCG8.5CAHE3/9AT suitable for automotive applications?
Yes, SMCG8.5CAHE3/9AT is AEC-Q101 qualified and explicitly rated for automotive use. Its construction includes glass-passivated junctions, MSL Level 1 reflow compatibility, and UL 497B recognition-all validated per automotive stress test requirements. It is deployed in ADAS sensor modules, body control units, and infotainment interfaces where transient immunity to ISO 7637-2 and IEC 61000-4-5 is mandatory.
How does the bidirectional design of SMCG8.5CAHE3/9AT affect its circuit implementation?
The bidirectional design of SMCG8.5CAHE3/9AT means it functions identically in both polarities, with no cathode band marking and symmetric VBR, VC, and IPPM values. In circuit layout, it is placed across the protected line and ground (or between differential lines), eliminating polarity concerns. This simplifies design for AC-coupled, floating, or dual-rail systems and avoids orientation errors during automated assembly.
What is the maximum operating temperature for SMCG8.5CAHE3/9AT?
The SMCG8.5CAHE3/9AT has a maximum junction temperature (TJ max) of +150 °C and an operating junction/storage temperature range of –55 °C to +150 °C. This rating enables reliable operation in under-hood automotive environments and high-ambient industrial enclosures. Derating curves in the datasheet (Figure 2) specify allowable PPPM reduction above 25 °C ambient to maintain safe TJ.
Does SMCG8.5CAHE3/9AT require special PCB layout considerations?
Yes-optimal performance of SMCG8.5CAHE3/9AT requires adherence to the recommended 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pad layout per terminal, as specified in the datasheet. This minimizes trace inductance and maximizes thermal dissipation. Short, direct connections to ground planes and avoidance of vias in the surge path are critical to preserve its <1 ns response time and prevent voltage overshoot during fast transients.
SMCG8.5CAHE3/9AT 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):
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCG)
SMCG8.5CAHE3/9AT FAQ
1.How can I place an order for SMCG8.5CAHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG8.5CAHE3/9AT 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 SMCG8.5CAHE3/9AT reliable?
The price and inventory of SMCG8.5CAHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG8.5CAHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG8.5CAHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG8.5CAHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG8.5CAHE3/9AT?
SMCG8.5CAHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG8.5CAHE3/9AT 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 SMCG8.5CAHE3/9AT?
For technical support, including SMCG8.5CAHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG8.5CAHE3/9AT requirements.
6.How does Aetrix verify that SMCG8.5CAHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG8.5CAHE3/9AT 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 SMCG8.5CAHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG8.5CAHE3/9AT?
All SMCG8.5CAHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG8.5CAHE3/9AT, 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 SMCG8.5CAHE3/9AT part is unused and in its original packaging.
Return procedure for SMCG8.5CAHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG8.5CAHE3/9AT Tags
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