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Vishay General Semiconductor - Diodes Division SMBG75CA-E3/52
- Part No.:
- SMBG75CA-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG75CA-E3/52.pdf
- Description:
- TVS DIODE 75VWM 121VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,554
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Product details
Overview
SMBG75CA-E3/52 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 a 75 V stand-off voltage (VWM), 83.3–92.1 V breakdown voltage (VBR) at 1 mA, 121 V maximum clamping voltage (VC) at 5.0 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 inductive switching surges.
For engineers reviewing the SMBG75CA-E3/52 datasheet, SMBG75CA-E3/52 pinout, SMBG75CA-E3/52 application, or SMBG75CA-E3/52 equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low leakage (<1.0 μA at VWM), thermal resistance (RθJA = 100 °C/W), and compatibility with automated SMT placement on standard 0.2" × 0.2" copper pads.
Technical Context
This device operates as a voltage-clamped surge protector with symmetrical avalanche behavior in both polarities, enabling protection of AC-coupled or floating signal paths without polarity concerns. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance, while the SMBG package supports high thermal dissipation under repetitive 0.01% duty-cycle pulses.
Designed for compliance with ANSI/IEEE C62.35, it delivers fast response time (<1 ns), meets UL 497B recognition (QVGQ2), and is rated for operation from –55 °C to +150 °C junction temperature - making it suitable for under-hood automotive environments and industrial control systems where reliability under thermal stress is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 75 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 72 V nominal automotive supply rails. |
| VBR (min/max) | 83.3 V / 92.1 V at 1 mA - Confirmed breakdown threshold range ensures consistent turn-on across production lots and temperature. |
| VC @ IPPM | 121 V at 5.0 A - Clamping voltage during 10/1000 μs surge limits downstream IC stress to safe levels per IEC 61000-4-5 Level 4. |
| PPPM | 600 W - Peak pulse power handling enables robust protection against 100 A surge events when derated per Fig. 2 above 25 °C. |
| ID @ VWM | <1.0 μA - Ultra-low leakage preserves signal integrity in high-impedance sensor bias networks and battery-powered nodes. |
| TJ max | +150 °C - Junction temperature rating supports sustained operation in engine control units and motor drive enclosures. |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, bidirectional configuration with no polarity marking; matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative half-cycle) | Accepts reverse surge current during negative voltage excursions; symmetric with cathode for bidirectional clamping. |
| Cathode | Transient current entry (positive half-cycle) | Accepts forward surge current during positive voltage excursions; electrically identical to anode in CA-series devices. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - required for powertrain and ADAS sensor protection. |
| 600 W peak pulse power (10/1000 μs) | Supports IEC 61000-4-5 surge immunity up to 4 kV (line-to-earth) in industrial PLC I/O modules without external series impedance. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (<1 ns response), improving protection margin for 3.3 V and 5 V logic interfaces. |
| MSL Level 1 (260 °C peak) | Enables single-reflow assembly without moisture sensitivity concerns - eliminates bake-out requirements in high-volume SMT lines. |
Applications
| Automotive Sensor Protection | Industrial I/O Protection |
|---|---|
Use Scenario: Protecting CAN FD transceiver inputs and analog sensor outputs (e.g., pressure, temperature) in engine control units exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector interface to limit transient energy entering signal conditioning circuitry. Use Value: Prevents latch-up or gate oxide damage in protected ICs by clamping surges to ≤121 V while maintaining <1.0 μA leakage at 75 V system rail. | Use Scenario: Safeguarding 24 V DC digital input cards in programmable logic controllers subjected to inductive kickback from solenoid switching. IC Role / Device Role / Timing Role: Primary surge suppression element across input terminals, coordinated with series impedance to meet IEC 61000-4-4 EFT and IEC 61000-4-5 surge immunity. Use Value: Enables compliance with industrial immunity standards using a single discrete component without requiring active circuitry or layout redesign. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Transient suppression on RS-485 bus lines in base station remote units exposed to lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Symmetrical clamping device placed differential-mode across A/B lines to suppress common-mode and differential-mode transients simultaneously. Use Value: Maintains signal integrity below 10 pF junction capacitance at zero bias (per Fig. 4), avoiding data rate degradation in 10 Mbps+ communication links. | Use Scenario: Secondary-side overvoltage protection in USB-C PD adapters where output rail must survive 100 V transients during fault conditions. IC Role / Device Role / Timing Role: Standoff-rated TVS placed between VOUT and GND to clamp regulator feedback node or output capacitor during overvoltage events. Use Value: Provides fail-safe shutdown margin for synchronous buck controllers by limiting output excursion to 121 V before controller UVLO or OVP triggers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ75CA | Same VWM/VBR/VC, but lower PPPM = 600 W (same rating), different package: SMB (DO-214AA); RθJA = 110 °C/W vs. 100 °C/W. | Less thermal margin in high-density layouts; not AEC-Q101 qualified. | Select SMBJ75CA only for cost-sensitive consumer applications where automotive qualification is unnecessary. |
| 1.5SMC75CA | Same electrical specs, but larger SMC (DO-214AB) package; higher IFSM = 100 A (vs. N/A for bidirectional), RθJA = 75 °C/W. | Better thermal performance but requires 30% more PCB area; not optimized for automated gull-wing placement. | Choose 1.5SMC75CA when board-level thermal management is constrained and footprint is not limiting. |
Compared with SMBJ75CA and 1.5SMC75CA, SMBG75CA-E3/52 offers superior thermal resistance (100 °C/W), AEC-Q101 qualification, and SMBG's optimized gull-wing leadform for fine-pitch automated assembly - making it the preferred choice for space-constrained, high-reliability automotive and industrial designs.
Availability
SMBG75CA-E3/52 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line protection, and consumer power adapter secondary-side clamping requiring stable component supply and full traceability.
Supply support for SMBG75CA-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, MOSFETs, and protection devices with emphasis on reliability, precision, and application-specific optimization.
The SMBG series was developed to deliver AEC-Q101-qualified, high-power TVS protection in low-profile gull-wing packages for next-generation automotive and industrial electronics demanding compact, thermally efficient, and automatable solutions.
FAQ
Is SMBG75CA-E3/52 unidirectional or bidirectional?
SMBG75CA-E3/52 is a bidirectional transient voltage suppressor, meaning it provides symmetrical clamping in both polarities - ideal for protecting AC-coupled signals, differential buses like RS-485, or floating power domains. Unlike unidirectional variants (e.g., SMBG75A), it has no cathode band marking and exhibits matched VBR and VC in either direction.
What is the maximum clamping voltage of SMBG75CA-E3/52 at its rated peak pulse current?
The maximum clamping voltage (VC) of SMBG75CA-E3/52 is 121 V at 5.0 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value is guaranteed per the Vishay datasheet (Document Number: 88456, Rev. 09-Jan-2024) and defines the upper voltage limit imposed on protected circuitry during surge events.
Does SMBG75CA-E3/52 meet automotive qualification standards?
Yes, SMBG75CA-E3/52 is AEC-Q101 qualified, as confirmed in the Vishay datasheet (footnote "(1) AEC-Q101 qualified" on page 3). This certification covers stress tests including temperature cycling, high-temperature reverse bias, and ESD, validating its suitability for automotive powertrain, chassis, and ADAS applications.
What is the thermal resistance of SMBG75CA-E3/52, and how does it affect layout design?
SMBG75CA-E3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value informs minimum pad size and copper pour requirements - reducing RθJA further requires additional thermal vias or larger copper areas to sustain repetitive surge duty cycles without exceeding TJ = 150 °C.
Can SMBG75CA-E3/52 be used in place of SMBG75A in a design?
No - SMBG75CA-E3/52 is bidirectional, while SMBG75A is unidirectional and includes a cathode band. Substituting them requires verifying circuit polarity, clamping symmetry, and whether the application relies on forward conduction (e.g., DC bias paths). SMBG75CA-E3/52 should only replace SMBG75A if the design explicitly requires bidirectional protection and no DC path dependency exists.
SMBG75CA-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):
- 75V
- Voltage - Breakdown (Min):
- 83.3V
- Voltage - Clamping (Max) @ Ipp:
- 121V
- Current - Peak Pulse (10/1000µs):
- 5A
- 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)
SMBG75CA-E3/52 FAQ
1.How can I place an order for SMBG75CA-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG75CA-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 SMBG75CA-E3/52 reliable?
The price and inventory of SMBG75CA-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 SMBG75CA-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBG75CA-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG75CA-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG75CA-E3/52?
SMBG75CA-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG75CA-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 SMBG75CA-E3/52?
For technical support, including SMBG75CA-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG75CA-E3/52 requirements.
6.How does Aetrix verify that SMBG75CA-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG75CA-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 SMBG75CA-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBG75CA-E3/52?
All SMBG75CA-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG75CA-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 SMBG75CA-E3/52 part is unused and in its original packaging.
Return procedure for SMBG75CA-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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