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Vishay General Semiconductor - Diodes Division SMBG8.5CA-E3/52
- Part No.:
- SMBG8.5CA-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG8.5CA-E3/52.pdf
- Description:
- TVS DIODE 8.5VWM 14.4VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,384
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Product details
Overview
SMBG8.5CA-E3/52 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for clamping ESD and surge transients on signal/power lines. It features 8.5 V stand-off voltage (VWM), 9.44–10.4 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 μs), 14.4 V maximum clamping voltage (VC) at 41.7 A, and AEC-Q101 qualification for automotive use.
For engineers reviewing the SMBG8.5CA-E3/52 datasheet, SMBG8.5CA-E3/52 pinout, SMBG8.5CA-E3/52 application, or SMBG8.5CA-E3/52 equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VBR ≈ 1.45), MSL Level 1 reflow compatibility, RoHS-compliant matte tin terminations, and suitability for I/O protection in harsh environments.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, with identical VBR, VC, and leakage specifications across reverse and forward directions. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance under repetitive 10/1000 μs transients up to 600 W.
The device is rated for -55 °C to +150 °C operating junction temperature, exhibits 100 °C/W typical junction-to-ambient thermal resistance, and meets UL 497B recognition (QVGQ2) for telecom and industrial protectors - enabling direct integration into safety-critical signal paths without external derating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - Maximum continuous reverse voltage before significant leakage; sets safe operating margin below system supply or signal swing. |
| VBR (min/max) | 9.44 V / 10.4 V at 1 mA - Confirmed breakdown threshold range; ensures reliable turn-on during fast transients without false triggering. |
| VC @ IPPM | 14.4 V at 41.7 A - Clamped voltage during 600 W surge; limits downstream IC stress to safe levels per IEC 61000-4-5. |
| PPPM | 600 W (10/1000 μs) - Peak surge handling capacity; supports robust protection against lightning-induced surges and inductive switching spikes. |
| ID @ VWM | 1.0 μA max - Ultra-low reverse leakage at stand-off; preserves signal integrity and battery life in high-impedance sensor interfaces. |
| TJ max | +150 °C - Extended junction temperature rating; enables deployment in under-hood automotive or industrial enclosures without thermal derating. |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. No polarity marking - bidirectional symmetry eliminates orientation concerns during automated placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Identical terminals handle surge current in either direction; no cathode band marking required for SMBG8.5CA-E3/52. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential signal lines (e.g., CAN, RS-485) without polarity constraints. |
| AEC-Q101 qualification | Validated reliability for automotive electronics including infotainment, ADAS sensors, and body control modules. |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow profiles without moisture sensitivity concerns or baking requirements. |
| UL 497B recognition (QVGQ2) | Meets safety standards for telecom and industrial protector classification - simplifies end-equipment certification. |
Applications
| Automotive Sensor Interface | Industrial RS-485 Bus |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine control units exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS clamp limiting transient overvoltage to ≤14.4 V during 10/1000 μs surges. Use Value: Prevents latch-up or gate oxide damage in downstream op-amps and ADCs while maintaining <1.0 μA leakage at 8.5 V rail. | Use Scenario: Safeguarding differential data lines in factory automation PLCs subjected to EFT bursts and ground bounce. IC Role / Device Role / Timing Role: Symmetric clamping element absorbing common-mode surges up to 600 W without polarity biasing. Use Value: Ensures uninterrupted communication by holding bus voltage within ±14.4 V during IEC 61000-4-4 events, preserving signal integrity. |
| Consumer USB-C Port | Telecom DSL Line Card |
Use Scenario: ESD protection for VBUS and CC lines in portable devices meeting IEC 61000-4-2 Level 4 (±15 kV air). IC Role / Device Role / Timing Role: Fast-response (sub-nanosecond) transient suppressor diverting ESD current away from USB controller pins. Use Value: Achieves <14.4 V clamping at 41.7 A peak, preventing permanent damage to 3.3 V/5 V interface circuitry. | Use Scenario: Primary surge protection on POTS line inputs of DSLAM equipment facing lightning-induced surges per ITU-T K.20. IC Role / Device Role / Timing Role: UL 497B-recognized protector absorbing multi-kA surges while maintaining low capacitance (<100 pF at 0 V). Use Value: Enables compliance with telecom safety standards without requiring additional isolation components or board space. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.5CA | Same VWM (8.5 V), but lower PPPM = 600 W (same rating), higher VC = 15.0 V at 40.0 A; SMBJ package (DO-214AB) has larger footprint and higher RθJA (110 °C/W). | Less suitable for space-constrained automotive PCBs due to larger 4.6 mm × 3.9 mm SMBJ vs. 4.57 mm × 3.94 mm SMBG outline. | Select SMBG8.5CA-E3/52 when board area is limited and thermal performance under sustained surge duty requires lower RθJA. |
| 1.5KE8.5CA | Higher PPPM = 1500 W, but axial DO-15 package; VC = 13.4 V at 112 A; not surface-mountable and lacks AEC-Q101 qualification. | Only viable for through-hole prototyping or non-automotive industrial designs where reflow assembly and automotive qualification are not required. | Choose SMBG8.5CA-E3/52 for production-grade SMT assembly, automotive compliance, and consistent thermal behavior in dense layouts. |
Compared with SMBJ8.5CA and 1.5KE8.5CA, SMBG8.5CA-E3/52 delivers identical surge rating in a smaller, AEC-Q101-qualified SMT package with superior thermal resistance (100 °C/W vs. 110 °C/W) and zero-polarity assembly - making it optimal for high-reliability automotive and industrial edge nodes.
Availability
SMBG8.5CA-E3/52 is available at Aetrix Electronics and suitable for automotive sensor protection, industrial RS-485 networks, consumer USB-C port hardening, and telecom DSL line cards requiring stable component supply and long-term lifecycle support.
Supply support for SMBG8.5CA-E3/52 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, efficiency, and application-specific optimization.
The SMBG series was engineered for high-density, high-reliability transient suppression in automotive and industrial environments - combining AEC-Q101 qualification, MSL Level 1 compatibility, and UL safety recognition in a compact surface-mount format.
FAQ
What does the "CA" suffix indicate in SMBG8.5CA-E3/52?
The "CA" suffix denotes a bidirectional configuration - meaning SMBG8.5CA-E3/52 provides symmetrical transient suppression in both polarities, unlike unidirectional variants (e.g., SMBG8.5A). This allows single-device protection of AC signals, differential buses, or systems where voltage polarity reversal may occur during fault conditions.
Is SMBG8.5CA-E3/52 suitable for automotive applications?
Yes, SMBG8.5CA-E3/52 is AEC-Q101 qualified and rated for -55 °C to +150 °C operation, making it suitable for under-hood and cabin automotive applications including sensor interfaces, infotainment I/O, and body electronics. Its UL 497B recognition further supports compliance in automotive telecom subsystems.
What is the clamping voltage of SMBG8.5CA-E3/52 at its rated peak pulse current?
The maximum clamping voltage (VC) of SMBG8.5CA-E3/52 is 14.4 V at 41.7 A peak pulse current (IPPM), measured with a 10/1000 μs waveform. This value defines the upper voltage limit imposed on protected circuitry during a full-rated 600 W transient event.
Does SMBG8.5CA-E3/52 require polarity-aware PCB layout?
No - SMBG8.5CA-E3/52 is a bidirectional TVS with symmetrical terminals and no cathode marking. The SMBG (DO-215AA) package has identical electrical behavior regardless of orientation, eliminating polarity verification during automated placement and reducing assembly errors.
How does the thermal resistance of SMBG8.5CA-E3/52 impact its surge handling capability?
SMBG8.5CA-E3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W. This enables effective heat dissipation during short-duration surges, supporting its full 600 W rating when mounted on recommended 5.0 mm × 5.0 mm copper pads - critical for sustaining repetitive surge events in industrial controllers.
SMBG8.5CA-E3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-215AA, SMB 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):
- 41.7A
- Power - Peak Pulse:
- 600W
- 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-214AA (SMBG)
SMBG8.5CA-E3/52 FAQ
1.How can I place an order for SMBG8.5CA-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG8.5CA-E3/52 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 SMBG8.5CA-E3/52 reliable?
The price and inventory of SMBG8.5CA-E3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG8.5CA-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBG8.5CA-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG8.5CA-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG8.5CA-E3/52?
SMBG8.5CA-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG8.5CA-E3/52 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 SMBG8.5CA-E3/52?
For technical support, including SMBG8.5CA-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG8.5CA-E3/52 requirements.
6.How does Aetrix verify that SMBG8.5CA-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG8.5CA-E3/52 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 SMBG8.5CA-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBG8.5CA-E3/52?
All SMBG8.5CA-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG8.5CA-E3/52, 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 SMBG8.5CA-E3/52 part is unused and in its original packaging.
Return procedure for SMBG8.5CA-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG8.5CA-E3/52 Tags
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