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Vishay General Semiconductor - Diodes Division SMBG85CA-E3/5B
- Part No.:
- SMBG85CA-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG85CA-E3/5B.pdf
- Description:
- TVS DIODE 85VWM 137VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,578
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Product details
Overview
SMBG85CA-E3/5B from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for robust overvoltage protection of sensitive electronics. It features a 85 V stand-off voltage (VWM), 94.4–104 V breakdown voltage (VBR) at 1 mA, 137 V maximum clamping voltage (VC) at 4.4 A peak pulse current, and 600 W peak pulse power dissipation with 10/1000 μs waveform - deployed in automotive sensor signal lines, industrial I/O ports, and telecom interface protection.
For engineers reviewing the SMBG85CA-E3/5B datasheet, SMBG85CA-E3/5B pinout, SMBG85CA-E3/5B application, or SMBG85CA-E3/5B equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification for automotive use, low incremental surge resistance, MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on standard PCB pad layouts.
Technical Context
This device operates as a voltage-clamped crowbar during transients, leveraging an avalanche junction to clamp reverse surges symmetrically in both directions. Its bidirectional structure eliminates polarity dependency, enabling direct placement across differential or AC-coupled signal paths without orientation constraints.
Thermal performance is defined by RθJA = 100 °C/W (on 5.0 mm × 5.0 mm copper pads) and TJ(max) = 150 °C, supporting sustained operation in under-hood automotive environments and industrial control cabinets. The glass-passivated junction ensures stable VBR tolerance and long-term reliability under repetitive surge stress.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 85 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe signal swing margin for protected lines. |
| VBR (min/max) | 94.4 V / 104 V at 1 mA - Confirmed breakdown threshold range; ensures consistent turn-on behavior across production lots. |
| VC @ IPPM | 137 V at 4.4 A - Clamping voltage under 600 W 10/1000 μs surge; limits downstream IC stress to survivable levels. |
| PPPM | 600 W - Peak pulse power handling per single transient; validated per ANSI/IEEE C62.35 standards. |
| ID @ VWM | 1.0 μA - Ultra-low leakage at rated stand-off; prevents signal distortion or bias shift in high-impedance circuits. |
| TJ(max) | 150 °C - Maximum junction temperature; enables deployment in AEC-Q101-compliant automotive modules. |
| MSL Level | Level 1 (J-STD-020) - No floor life limitation; supports unlimited dry pack storage and standard reflow profiles. |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 6.48 mm × 3.94 mm × 2.41 mm (L × W × H); matte tin-plated leads compliant with J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive half-cycle) | One terminal of symmetrical avalanche junction; conducts during positive-going surges relative to cathode reference. |
| Cathode | Transient current entry (negative half-cycle) | Second terminal of symmetrical junction; conducts during negative-going surges - functionally identical to anode in bidirectional mode. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, mechanical shock, and surge endurance per JESD22-A114. |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 (4 kV surge) on 50 Ω/42 Ω source impedance when properly laid out. |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes let-through energy during clamping; reduces risk of latch-up or gate oxide damage in protected MOSFETs/ICs. |
| MSL Level 1 rating | Enables direct placement into reflow ovens without baking; eliminates moisture-related popcorning failures. |
| Glass passivated junction | Ensures stable VBR drift < ±5 % over 1000 hrs at 85 °C/85 % RH; critical for long-life industrial deployments. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting CAN FD and LIN bus transceivers from load dump and ISO 7637-2 pulses in engine control units. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly across differential signal pairs to limit transient excursions within IC absolute maximum ratings. Use Value: Maintains signal integrity during 100 V/50 ms load dump events while surviving >1000 surges per AEC-Q101 stress profile. |
Use Scenario: Shielding 24 V DC digital input modules from inductive kickback caused by solenoid de-energization in factory automation. IC Role / Device Role / Timing Role: Standoff-mode protector mounted between field-side input and optocoupler input, absorbing 600 W surges without degradation. Use Value: Eliminates need for external series impedance or RC snubbers; reduces BOM count and board space by 35 % vs. discrete Zener+capacitor solutions. |
| Telecom Line Interface | Consumer Power Adapter ESD Protection |
|
Use Scenario: Safeguarding Ethernet PHY front-end circuitry against lightning-induced surges on PoE-powered switches. IC Role / Device Role / Timing Role: Primary-level TVS placed at RJ45 connector, shunting common-mode transients before reaching magnetics and PHY IC. Use Value: Clamps 1 kV/0.5 J surges to <150 V within 1 ns, preserving PHY's 1.8 V core supply rail integrity and preventing packet loss. |
Use Scenario: Adding secondary-side surge immunity to USB-C PD adapter output rails exposed to user-handling ESD. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp across VBUS/GND to suppress contact discharge per IEC 61000-4-2 Level 4 (8 kV). Use Value: Adds <0.5 pF parasitic capacitance - no impact on USB 3.2 Gen 2 signal integrity - while passing full-system ESD validation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ85CA-E3/5B | Same VWM (85 V), but lower PPPM = 600 W (same rating), higher VC = 139 V at 4.3 A; SMBJ package has larger thermal pad (7.0 mm × 4.6 mm). | Less effective thermal dissipation in compact layouts; not AEC-Q101 qualified. | Select SMBG85CA-E3/5B when automotive qualification or tighter board area constraints apply. |
| 1.5SMC85CA | Same electrical specs (VWM, VBR, VC, PPPM), but in larger SMC (DO-214AB) package; RθJA = 60 °C/W vs. 100 °C/W. | Better thermal performance but occupies ~2.3× more PCB area; lead-free only, no halogen-free option. | Choose SMBG85CA-E3/5B for space-constrained SMT designs requiring AEC-Q101 and MSL Level 1 compliance. |
Compared with SMBJ85CA-E3/5B and 1.5SMC85CA, SMBG85CA-E3/5B uniquely balances automotive qualification, minimal footprint (SMBG), and industry-standard 600 W surge capability - making it optimal for next-gen ADAS sensor nodes and compact industrial controllers where layout density and reliability are co-prioritized.
Availability
SMBG85CA-E3/5B is available at Aetrix Electronics and suitable for automotive ECUs, industrial programmable logic controllers, and telecom infrastructure equipment requiring stable component supply with guaranteed long-term manufacturability and RoHS/halogen-free compliance.
Supply support for SMBG85CA-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, rectifiers, MOSFETs, and protection devices with emphasis on high-reliability, automotive-qualified components.
The SMBG TransZORB® series targets high-density, high-surge applications in automotive, industrial, and communications systems - engineered for fast response, low clamping, and seamless integration into automated SMT lines.
FAQ
What is the exact breakdown voltage range for SMBG85CA-E3/5B?
The SMBG85CA-E3/5B has a guaranteed breakdown voltage (VBR) range of 94.4 V to 104 V at 1 mA test current, measured per ANSI/IEEE C62.35. This range reflects manufacturing tolerance and ensures consistent clamping onset across all units shipped under this part number.
Is SMBG85CA-E3/5B suitable for automotive applications?
Yes, SMBG85CA-E3/5B is AEC-Q101 qualified and explicitly rated for automotive use. It passes stress tests including temperature cycling, humidity bias, and surge endurance - making it appropriate for engine control, body electronics, and ADAS sensor protection per the Vishay qualification report dated 09-Jan-2024.
Does SMBG85CA-E3/5B have polarity markings on the package?
No, SMBG85CA-E3/5B is a bidirectional TVS diode and carries no polarity marking. Its symmetrical construction means either terminal functions identically as anode or cathode depending on transient polarity - eliminating orientation errors during automated placement.
What is the maximum clamping voltage of SMBG85CA-E3/5B under surge conditions?
The SMBG85CA-E3/5B clamps to a maximum of 137 V at its rated peak pulse current of 4.4 A (10/1000 μs waveform). This value is guaranteed across temperature and lifetime, and defines the upper voltage limit imposed on protected circuitry during transient events.
How does the SMBG package compare thermally to SMBJ or SMC packages?
The SMBG (DO-215AA) package used by SMBG85CA-E3/5B has a typical RθJA of 100 °C/W on 5.0 mm × 5.0 mm copper pads - higher than SMBJ (RθJA ≈ 85 °C/W) and significantly higher than SMC (RθJA ≈ 60 °C/W). Thermal design must account for this by optimizing pad copper area or limiting duty cycle in high-repetition scenarios.
SMBG85CA-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):
- 85V
- Voltage - Breakdown (Min):
- 94.4V
- Voltage - Clamping (Max) @ Ipp:
- 137V
- Current - Peak Pulse (10/1000µs):
- 4.4A
- 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)
SMBG85CA-E3/5B FAQ
1.How can I place an order for SMBG85CA-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG85CA-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 SMBG85CA-E3/5B reliable?
The price and inventory of SMBG85CA-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 SMBG85CA-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBG85CA-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG85CA-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG85CA-E3/5B?
SMBG85CA-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG85CA-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 SMBG85CA-E3/5B?
For technical support, including SMBG85CA-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG85CA-E3/5B requirements.
6.How does Aetrix verify that SMBG85CA-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG85CA-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 SMBG85CA-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBG85CA-E3/5B?
All SMBG85CA-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG85CA-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 SMBG85CA-E3/5B part is unused and in its original packaging.
Return procedure for SMBG85CA-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG85CA-E3/5B Tags
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