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Vishay General Semiconductor - Diodes Division SMBG8.5CA-E3/5B
- Part No.:
- SMBG8.5CA-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG8.5CA-E3/5B.pdf
- Description:
- TVS DIODE 8.5VWM 14.4VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,890
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Product details
Overview
SMBG8.5CA-E3/5B from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for clamping voltage transients on signal or power lines. It features 8.5 V stand-off voltage (VWM), 9.44–10.4 V breakdown voltage (VBR) at 1 mA, 14.4 V maximum clamping voltage (VC) at 20 A peak pulse current, and 600 W peak pulse power rating with 10/1000 μs waveform - used to protect automotive sensor interfaces and industrial I/O circuits against ESD and load dump.
For engineers reviewing the SMBG8.5CA-E3/5B datasheet, SMBG8.5CA-E3/5B pinout, SMBG8.5CA-E3/5B application, or SMBG8.5CA-E3/5B equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, bidirectional clamping behavior, thermal resistance (RθJA = 100 °C/W), and mounting pad layout compliance per J-STD-020 MSL Level 1.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, with identical VBR, VC, and IPPM specifications for positive and negative surges. Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and fast response time (<1.0 ns), enabling protection of high-speed analog and digital signal paths without signal distortion.
The device is rated for -55 °C to +150 °C operating junction temperature, supports 0.01 % duty cycle repetitive surge testing, and meets UL 497B recognition (QVGQ2) for telecom and industrial protector classification. Its low incremental surge resistance enhances energy absorption efficiency during transient events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - Maximum continuous reverse working voltage before clamping begins; sets upper limit for safe operation in protected circuit. |
| VBR (min/max) | 9.44 V / 10.4 V at IT = 1 mA - Confirmed breakdown threshold range defining reliable turn-on under surge conditions. |
| VC @ IPPM | 14.4 V at 20 A - Clamped voltage during 10/1000 μs transient; determines maximum stress imposed on downstream ICs. |
| PPPM | 600 W - Peak pulse power handling capability; defines survivability against standardized lightning or EFT surges. |
| IPPM | 20 A - Peak pulse current corresponding to VC; used to size PCB trace width and verify system-level surge margin. |
| Junction Temp Range | -55 °C to +150 °C - Validated operating envelope supporting under-hood automotive and industrial environments. |
| MSL Level | Level 1 (260 °C peak reflow) - Enables standard SMT assembly without moisture sensitivity concerns. |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, bidirectional configuration with no polarity marking. Case conforms to JEDEC DO-215AA outline, featuring 0.235" × 0.255" (5.97 mm × 6.48 mm) footprint and 0.030" (0.76 mm) max height. Mounting requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal per Vishay recommended layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | Accepts reverse surge current during negative transients; symmetrical with cathode for bidirectional operation. |
| Cathode | Transient current entry (positive polarity) | Accepts forward surge current during positive transients; functionally identical to anode in bidirectional mode. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control modules and ADAS sensor interfaces. |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 (4 kV) surge events when properly mounted on recommended copper pads. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage exposure to protected ICs compared to higher-ratio TVS devices. |
| UL 497B recognized (QVGQ2) | Approved for use in telecom line interface and industrial fieldbus protection without additional certification. |
| Matte tin-plated leads | Ensures solderability per J-STD-002 and JESD 22-B102, with whisker resistance per JESD 201 Class 2. |
Applications
| Automotive Sensor Protection | Industrial Fieldbus Interface |
|---|---|
|
Use Scenario: Protecting CAN FD and LIN bus transceivers from load dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across differential bus lines to limit transient voltage excursions. Use Value: Maintains signal integrity by clamping surges to ≤14.4 V while surviving 20 A pulses - critical for AEC-Q100 Grade 1 IC compatibility. |
Use Scenario: Safeguarding RS-485 transceivers in factory automation PLCs exposed to motor switching noise. IC Role / Device Role / Timing Role: Line-side TVS connected between A/B bus lines and ground to absorb common-mode transients. Use Value: Prevents latch-up in MAX1487-level transceivers by limiting peak differential voltage to 14.4 V during 10/1000 μs surges. |
| Consumer Power Adapter Input | Medical Diagnostic Signal Conditioning |
|
Use Scenario: Input-stage surge suppression on 12 V DC input rails of wall-mounted smart home hubs. IC Role / Device Role / Timing Role: Primary overvoltage clamp ahead of buck converter ICs and input EMI filters. Use Value: Absorbs 600 W surges without degradation, enabling compliance with IEC 61000-4-5 Ed.3 Annex A test requirements. |
Use Scenario: Protecting analog front-end amplifiers in portable ultrasound probes from ESD events during handling. IC Role / Device Role / Timing Role: Low-capacitance (<50 pF typical at 0 V) bidirectional clamp on differential sensor inputs. Use Value: Adds <1.0 μA leakage at 8.5 V while preserving signal-to-noise ratio in sub-mV biomedical measurements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.5CA-E3/5B | Same VWM/VBR/VC, but lower PPPM = 600 W (same rating) and identical SMB (DO-214AA) package - slightly larger footprint (0.265" × 0.205") than SMBG. | Less suitable for ultra-dense layouts where SMBG's smaller DO-215AA outline provides board space advantage. | Select SMBG8.5CA-E3/5B when PCB real estate is constrained and DO-215AA mounting is preferred. |
| 1.5SMC8.5CA | Same electrical specs but in larger SMC (DO-214AB) package (0.305" × 0.255"); higher thermal mass but incompatible footprint. | Used where higher thermal dissipation margin is needed in non-automotive industrial designs with relaxed layout constraints. | Choose SMBG8.5CA-E3/5B for AEC-Q101 compliance and automotive-grade reliability; 1.5SMC8.5CA lacks AEC-Q101 qualification. |
Compared with SMBJ8.5CA-E3/5B and 1.5SMC8.5CA, SMBG8.5CA-E3/5B offers the smallest footprint among 8.5 V bidirectional TVS diodes with AEC-Q101 qualification, enabling compact placement near high-speed connectors while maintaining full 600 W surge capability and UL recognition.
Availability
SMBG8.5CA-E3/5B is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial fieldbus protection, and medical diagnostic equipment requiring stable component supply with AEC-Q101 validation and RoHS compliance.
Supply support for SMBG8.5CA-E3/5B 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 and automotive-grade qualification.
The SMBG series targets high-reliability transient suppression in space-constrained automotive and industrial systems, delivering AEC-Q101-qualified TVS performance in the smallest possible surface-mount package.
FAQ
What is the clamping voltage of SMBG8.5CA-E3/5B at its rated peak pulse current?
The SMBG8.5CA-E3/5B has a maximum clamping voltage (VC) of 14.4 V at 20 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value is measured under standardized test conditions and defines the upper voltage limit imposed on protected circuitry during surge events. The SMBG8.5CA-E3/5B maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C).
Is SMBG8.5CA-E3/5B suitable for automotive applications?
Yes, SMBG8.5CA-E3/5B is AEC-Q101 qualified and rated for junction temperatures up to +150 °C, making it suitable for under-hood and body-control module applications. It is commonly deployed in automotive sensor interfaces, infotainment power rails, and LIN/CAN bus protection. The SMBG8.5CA-E3/5B also carries UL 497B recognition (QVGQ2), supporting compliance in automotive subsystems requiring third-party safety certification.
What does the "CA" suffix indicate in SMBG8.5CA-E3/5B?
The "CA" suffix denotes a bidirectional configuration, meaning the SMBG8.5CA-E3/5B provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., SMBG8.5A), the CA version has no polarity marking and exhibits identical VBR, VC, and IPPM characteristics in either direction - essential for protecting AC-coupled or differential signal lines.
How does the SMBG (DO-215AA) package differ from SMB (DO-214AA)?
The SMBG (DO-215AA) package is dimensionally smaller than SMB (DO-214AA): 0.235" × 0.255" vs. 0.205" × 0.265", with tighter lead spacing and optimized thermal pad layout. The SMBG8.5CA-E3/5B uses this compact outline to reduce PCB area while maintaining 600 W pulse power capability. Its recommended mounting pad is 0.2" × 0.2" per terminal, differing from SMB's pad requirements.
What is the maximum reverse leakage current for SMBG8.5CA-E3/5B at its stand-off voltage?
The SMBG8.5CA-E3/5B exhibits a maximum reverse leakage current (ID) of 1.0 μA at its 8.5 V stand-off voltage (VWM) and 25 °C ambient temperature. This low leakage ensures minimal power loss in always-on circuits and preserves signal integrity in high-impedance sensor interfaces. The SMBG8.5CA-E3/5B maintains leakage below 5.0 μA across its full -55 °C to +125 °C operating range.
SMBG8.5CA-E3/5B 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-E3/5B FAQ
1.How can I place an order for SMBG8.5CA-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG8.5CA-E3/5B 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-E3/5B reliable?
The price and inventory of SMBG8.5CA-E3/5B 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-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBG8.5CA-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG8.5CA-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG8.5CA-E3/5B?
SMBG8.5CA-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG8.5CA-E3/5B 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-E3/5B?
For technical support, including SMBG8.5CA-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG8.5CA-E3/5B requirements.
6.How does Aetrix verify that SMBG8.5CA-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG8.5CA-E3/5B 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-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBG8.5CA-E3/5B?
All SMBG8.5CA-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG8.5CA-E3/5B, 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-E3/5B part is unused and in its original packaging.
Return procedure for SMBG8.5CA-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG8.5CA-E3/5B Tags
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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