My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMBG85CA-E3/52
- Part No.:
- SMBG85CA-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG85CA-E3/52.pdf
- Description:
- TVS DIODE 85VWM 137VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,660
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBG85CA-E3/52 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for robust overvoltage protection of signal and power lines. It features 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 rating with 10/1000 μs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMBG85CA-E3/52 datasheet, SMBG85CA-E3/52 pinout, SMBG85CA-E3/52 application, or SMBG85CA-E3/52 equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, bidirectional clamping behavior, thermal resistance (RθJA = 100 °C/W), and package mechanical dimensions per DO-215AA - all critical for ESD/surge co-design and layout validation.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical VBR, VC, and leakage specifications in forward and reverse directions. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance, enabling consistent clamping performance under repetitive transients.
The device is rated for -55 °C to +150 °C operating junction temperature, meets MSL Level 1 per J-STD-020 (260 °C reflow peak), and is AEC-Q101 qualified - confirming suitability for automotive under-hood and chassis-mounted electronics where thermal cycling and long-term reliability are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 85 V - Maximum continuous reverse working voltage before clamping initiates; defines safe operating margin for 24 V/48 V automotive bus systems. |
| VBR (min/max) | 94.4 V / 104 V at 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on during fast-rising transients (e.g., ISO 7637-2 Pulse 1/2a/5a). |
| VC @ IPPM | 137 V at 4.4 A - Clamped voltage under 600 W 10/1000 μs surge; limits downstream IC stress to <150 V in CAN/LIN/UART lines. |
| PPPM | 600 W - Peak pulse power handling capability; supports compliance with IEC 61000-4-5 Level 3 (2 kV line-to-line, 4 kV line-to-earth). |
| ID @ VWM | 1.0 μA max - Ultra-low reverse leakage at stand-off voltage; avoids signal integrity degradation in high-impedance sensor bias networks. |
| TJ max | +150 °C - Maximum junction temperature rating; enables operation in engine control units (ECUs) and powertrain modules without derating. |
| RθJA | 100 °C/W - Thermal resistance junction-to-ambient on 5.0 mm × 5.0 mm copper pads; informs PCB copper area requirements for sustained surge duty cycles. |
Pinout & Package
Package: SMBG (DO-215AA) - surface-mount, low-profile (max height 1.90 mm), matte tin-plated leads, RoHS-compliant, UL 94 V-0 molding compound. Bidirectional configuration has no polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Terminal A | One side of symmetrical PN junction; connects to protected line (e.g., CAN_H or LIN bus) with no cathode band indicator. |
| Cathode | Terminal K | Other side of symmetrical PN junction; electrically identical to Anode in bidirectional mode; forms clamping path in either polarity. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables single-device protection against severe automotive load dump and inductive switching events without cascaded staging. |
| AEC-Q101 qualified | Validated for automotive applications including powertrain, body control, and ADAS sensor modules per stress test requirements. |
| Low incremental surge resistance | Minimizes VC overshoot during fast transients (<1 ns response), improving clamping precision for sensitive analog front-ends. |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow assembly without preconditioning; eliminates moisture-related popcorning risk. |
| Glass passivated chip junction | Ensures long-term parameter stability and resistance to humidity-induced parameter drift in harsh under-hood environments. |
Applications
| Automotive CAN Bus Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting CAN_H/CAN_L differential pair in vehicle ECUs against ISO 7637-2 pulses and ESD events. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector entry point to shunt surge energy before transceiver input. Use Value: Limits clamped voltage to ≤137 V while maintaining <1.0 μA leakage - preserving CAN common-mode range and bit timing integrity. | Use Scenario: Safeguarding 4–20 mA current loop inputs in PLC analog I/O modules from field wiring surges. IC Role / Device Role / Timing Role: Parallel-connected TVS across loop terminals to clamp transients induced by motor contactor switching or lightning coupling. Use Value: Withstands 600 W surges without degradation, ensuring uninterrupted loop operation and eliminating need for external crowbar circuits. |
| Automotive LIN Bus Protection | Consumer Appliance Motor Driver Protection |
Use Scenario: Securing LIN transceiver pins in door module controllers exposed to battery disconnect transients. IC Role / Device Role / Timing Role: Low-capacitance bidirectional suppressor placed between LIN pin and ground to absorb negative-going spikes and positive load dumps. Use Value: 137 V clamping voltage prevents LIN transceiver latch-up while 100 °C/W RθJA allows thermal management on compact PCBs. | Use Scenario: Protecting gate drive signals of MOSFET half-bridges in washing machine motor inverters from back-EMF spikes. IC Role / Device Role / Timing Role: TVS mounted at driver output node to clamp inductive kickback before reaching gate oxide. Use Value: 94.4–104 V VBR aligns with 12 V logic supply rails; 600 W rating handles repeated motor stall events without parametric shift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ85CA-E3/52 | Same VWM/VBR/VC, but SMB (DO-214AA) package - 2.4 mm height vs. SMBG's 1.9 mm; RθJA = 110 °C/W. | Less suitable for ultra-low-profile automotive modules; requires larger pad layout and higher thermal budget. | Select SMBG85CA-E3/52 when board height <2.0 mm or thermal resistance <105 °C/W is required. |
| SMCJ85CA-E3/52 | Same electrical specs but SMC (DO-214AB) package - 2.6 mm height, 1500 W PPPM, RθJA = 50 °C/W. | Better for high-energy surges (e.g., 10/1000 μs >1000 W), but incompatible with space-constrained layouts. | Choose SMBG85CA-E3/52 for footprint-constrained designs where 600 W suffices and height is critical. |
Compared with SMBJ85CA-E3/52 and SMCJ85CA-E3/52, SMBG85CA-E3/52 delivers optimal balance of low profile (1.9 mm), AEC-Q101 qualification, and 600 W surge handling - making it the preferred choice for next-gen automotive domain controllers and compact industrial sensors where vertical clearance and automotive-grade reliability are jointly mandated.
Availability
SMBG85CA-E3/52 is available at Aetrix Electronics and suitable for automotive electronics, industrial I/O modules, and consumer appliance motor control systems requiring stable component supply and AEC-Q101 compliance.
Supply support for SMBG85CA-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, rectifiers, TVS devices, and power MOSFETs with emphasis on reliability, ruggedness, and automotive qualification.
The SMBG series was engineered specifically for space-constrained, high-reliability transient suppression in automotive and industrial environments - combining low-profile packaging, AEC-Q101 validation, and precise bidirectional clamping.
FAQ
What is the clamping voltage of SMBG85CA-E3/52 and how is it measured?
The SMBG85CA-E3/52 has a maximum clamping voltage (VC) of 137 V, measured at 4.4 A peak pulse current using a 10/1000 μs waveform per IEC 61000-4-5. This value is guaranteed across the full operating temperature range (-55 °C to +150 °C) and reflects the actual voltage seen by protected circuitry during surge events - critical for validating transceiver survivability in automotive CAN/LIN designs.
Is SMBG85CA-E3/52 unidirectional or bidirectional, and how does that affect its use?
SMBG85CA-E3/52 is a bidirectional TVS diode, meaning it provides symmetrical clamping in both polarities without polarity marking. This makes it ideal for protecting AC-coupled or differential signal lines like CAN, LIN, or RS-485, where transients can occur with either polarity - unlike unidirectional variants (e.g., SMBG85A-E3/52) which require correct cathode orientation and only clamp in one direction.
Does SMBG85CA-E3/52 meet automotive qualification standards?
Yes, SMBG85CA-E3/52 is AEC-Q101 qualified, as confirmed in Vishay's official documentation (Document Number: 88456, Revision: 09-Jan-2024). This qualification covers stress tests including HTGB, HTRB, TCT, and ESD - verifying its suitability for automotive powertrain, chassis, and body electronics where long-term reliability under thermal and electrical stress is mandatory.
What is the thermal resistance of SMBG85CA-E3/52 and why does it matter?
The SMBG85CA-E3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 5.0 mm × 5.0 mm copper pads per terminal. This value directly impacts temperature rise during repetitive surge events - a lower RθJA allows higher duty-cycle operation without exceeding the +150 °C maximum junction temperature, essential for industrial motor drives and automotive ECUs with frequent transient exposure.
How does the SMBG (DO-215AA) package of SMBG85CA-E3/52 compare to SMB (DO-214AA)?
The SMBG (DO-215AA) package of SMBG85CA-E3/52 is 1.9 mm tall versus 2.4 mm for SMB (DO-214AA), enabling tighter stacking heights in multi-layer automotive modules. It also offers slightly better thermal performance (RθJA = 100 °C/W vs. 110 °C/W for SMBJ variants) and maintains identical electrical specs - making SMBG85CA-E3/52 the preferred choice when board height or thermal efficiency is constrained.
SMBG85CA-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):
- 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-E3/52 FAQ
1.How can I place an order for SMBG85CA-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG85CA-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 SMBG85CA-E3/52 reliable?
The price and inventory of SMBG85CA-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 SMBG85CA-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBG85CA-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG85CA-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG85CA-E3/52?
SMBG85CA-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG85CA-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 SMBG85CA-E3/52?
For technical support, including SMBG85CA-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG85CA-E3/52 requirements.
6.How does Aetrix verify that SMBG85CA-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG85CA-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 SMBG85CA-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBG85CA-E3/52?
All SMBG85CA-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG85CA-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 SMBG85CA-E3/52 part is unused and in its original packaging.
Return procedure for SMBG85CA-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG85CA-E3/52 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
