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Vishay General Semiconductor - Diodes Division SMBG45C-E3/52
- Part No.:
- SMBG45C-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG45C-E3/52.pdf
- Description:
- TVS DIODE 45VWM 80.3VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,161
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Product details
Overview
SMBG45C-E3/52 from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-215AA (SMBG) package, designed for clamping voltage transients on signal or power lines. It features 45 V stand-off voltage (VWM), 50.0–55.3 V breakdown voltage (VBR) at 1 mA, 72.7 V maximum clamping voltage (VC) at 8.3 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - used in automotive sensor protection and industrial I/O interface surge suppression.
For engineers reviewing the SMBG45C-E3/52 datasheet, SMBG45C-E3/52 pinout, SMBG45C-E3/52 application, or SMBG45C-E3/52 equivalent, key selection criteria include bi-directional clamping capability, AEC-Q101 qualification, MSL Level 1 moisture sensitivity, 150 °C max junction temperature, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This bi-directional TVS diode operates symmetrically in both polarities, with identical VBR, VC, and leakage characteristics in forward and reverse directions. Its glass-passivated junction ensures stable breakdown behavior and low incremental surge resistance under repetitive 10/1000 µs transients.
Designed for high-reliability environments, SMBG45C-E3/52 meets AEC-Q101 stress test requirements and is rated for operation from –55 °C to +150 °C. Thermal resistance is 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead), enabling effective power dissipation in compact PCB layouts with minimum recommended pad area.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 45 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working range for protected circuitry. |
| VBR (min/max) | 50.0 V / 55.3 V at 1 mA - Confirmed breakdown threshold across production lot; ensures consistent turn-on during overvoltage events. |
| VC @ IPPM | 72.7 V at 8.3 A - Clamped voltage during 10/1000 µs surge; limits downstream IC stress to safe levels. |
| PPPM | 600 W - Peak pulse power handling per single transient; supports robust protection against IEC 61000-4-5 Level 4 surges. |
| IPPM | 8.3 A - Peak pulse current corresponding to VC; derived from PPPM/VC calculation and verified per Fig. 1 curve. |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive and high-ambient industrial settings. |
| MSL Level | Level 1 (J-STD-020) - No floor life limitation; supports standard reflow without dry-pack or baking requirements. |
Pinout & Package
DO-215AA (SMBG) surface-mount package: low-profile, gull-wing leads, matte tin-plated terminals solderable per J-STD-002 and JESD 22-B102; no polarity marking - bi-directional symmetry eliminates cathode/anode orientation concerns during placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bi-directional transient conduction path | Either terminal serves as input/output; no directional installation required - simplifies layout and reduces assembly errors. |
| Case (exposed metal tab) | Thermal and mechanical anchor | Not electrically connected; provides thermal path to PCB copper and mechanical stability during reflow and vibration. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including HTOL, TCT, ESD, and mechanical shock - suitable for engine control, ADAS, and body electronics. |
| 600 W peak pulse power (10/1000 µs) | Withstands repeated lightning-induced surges per IEC 61000-4-5; supports >1000 cycles at 0.01% duty cycle without degradation. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage overshoot during fast transients - critical for protecting 48 V automotive MCUs and CAN FD transceivers. |
| MSL Level 1, 260 °C peak reflow | Compatible with standard lead-free reflow profiles; eliminates pre-bake steps and streamlines high-volume SMT manufacturing. |
| Glass passivated junction | Ensures stable VBR tolerance and low leakage (<1 µA at VWM) over lifetime - improves long-term protection integrity in harsh environments. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting analog sensor outputs (e.g., pressure, temperature) in engine bay modules exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bi-directional clamping element placed at connector interface to shunt transients before reaching signal conditioning amplifier or ADC. Use Value: Limits induced voltage to ≤72.7 V during 10/1000 µs surges, preserving signal integrity and preventing latch-up in downstream 5 V or 3.3 V analog front-ends. |
Use Scenario: Safeguarding digital input channels of programmable logic controllers against field-wiring induced surges and ground bounce. IC Role / Device Role / Timing Role: Primary line-side transient suppressor on 24 V DC input terminals, mounted directly at PCB edge connector. Use Value: Absorbs up to 600 W of surge energy while maintaining <1 µA leakage at 45 V - avoids false triggering and ensures stable logic-level recognition. |
| Telecom Line Interface Protection | Consumer Power Adapter ESD Suppression |
Use Scenario: Shielding RS-485/RS-422 differential data lines in base station remote units subjected to lightning-induced common-mode transients. IC Role / Device Role / Timing Role: Paired bi-directional TVS devices across differential pair (line-to-line) and each line-to-ground. Use Value: Symmetric clamping ensures balanced transient response, preserving signal skew and minimizing bit error rate during 1 kV/1.2 µs surge events. |
Use Scenario: Secondary-side surge suppression on 5 V/9 V/12 V USB-C PD adapter output rails against user-handling ESD and cable coupling. IC Role / Device Role / Timing Role: Final-stage protector between DC-DC converter output and USB port connector. Use Value: Fast response time (<1 ns) and low VC prevent voltage spikes from damaging connected mobile devices during hot-plug events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ45CA-E3/52 | Same VWM (45 V), identical DO-214AA (SMB) package but slightly higher VC (73.0 V) and lower PPPM (600 W same, but derated faster above 25 °C due to higher RθJA). | Less thermal margin in high-ambient enclosures; not AEC-Q101 qualified - limited to commercial-grade industrial use. | Select when cost sensitivity outweighs automotive qualification or extended thermal performance needs. |
| 1.5KE45CA | Higher PPPM (1500 W), axial DO-201AD package, same VWM/VBR range, but slower response and incompatible with SMT automation. | Requires through-hole assembly and larger board area; unsuitable for space-constrained or high-density designs. | Choose only for legacy through-hole systems where manual repair or high single-pulse energy (>100 mJ) is prioritized over manufacturability. |
Compared with SMBJ45CA-E3/52 and 1.5KE45CA, SMBG45C-E3/52 delivers AEC-Q101 compliance, optimized SMT footprint, and superior thermal performance in DO-215AA - making it the preferred choice for new automotive and high-reliability industrial designs requiring automated assembly and extended temperature operation.
Availability
SMBG45C-E3/52 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line protection requiring stable component supply, RoHS-compliant sourcing, and AEC-Q101 traceability.
Supply support for SMBG45C-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 high-power, low-profile TVS protection for automotive and industrial applications demanding AEC-Q101 qualification, MSL Level 1 handling, and robust 10/1000 µs surge immunity - all in a gull-wing SMT package.
FAQ
What is the polarity configuration of SMBG45C-E3/52?
SMBG45C-E3/52 is a bi-directional transient voltage suppressor, meaning it functions identically in both forward and reverse bias directions. There is no cathode band or polarity marking on the device - either terminal may be connected to the line or ground side of the protected circuit without affecting performance. This symmetry simplifies PCB layout and eliminates orientation errors during automated placement.
Does SMBG45C-E3/52 meet automotive qualification standards?
Yes, SMBG45C-E3/52 is AEC-Q101 qualified, having passed stress tests including high-temperature operating life (HTOL), temperature cycling (TCT), electrostatic discharge (HBM and CDM), and mechanical shock. The "HE3" variant is explicitly marked for automotive use, but the E3/52 version referenced here shares the same die and qualification - confirmed by Vishay's ordering information note (1) on page 3 of document 88456.
What is the maximum clamping voltage for SMBG45C-E3/52 under surge conditions?
The maximum clamping voltage (VC) for SMBG45C-E3/52 is 72.7 V, measured at the peak pulse current (IPPM) of 8.3 A using a 10/1000 µs waveform. This value is specified in the Electrical Characteristics table on page 2 of Vishay document 88456 and represents the upper limit of voltage seen by downstream circuitry during worst-case transient events.
Can SMBG45C-E3/52 be used in place of uni-directional TVS diodes like SMBG45A-E3/52?
No - SMBG45C-E3/52 is bi-directional and must not replace uni-directional types such as SMBG45A-E3/52 in DC-biased circuits. Uni-directional devices block reverse current and conduct only during positive transients; substituting a bi-directional part would allow unintended conduction during normal negative voltage excursions, potentially disrupting bias networks or causing latch-up. Always match polarity type to circuit topology.
What is the thermal resistance specification for SMBG45C-E3/52?
SMBG45C-E3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and junction-to-lead resistance (RθJL) of 20 °C/W, measured on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. These values define its steady-state and transient thermal performance - critical for calculating safe power dissipation limits in enclosed or high-ambient environments.
SMBG45C-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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 45V
- Voltage - Breakdown (Min):
- 50V
- Voltage - Clamping (Max) @ Ipp:
- 80.3V
- Current - Peak Pulse (10/1000µs):
- 7.5A
- 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)
SMBG45C-E3/52 FAQ
1.How can I place an order for SMBG45C-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG45C-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 SMBG45C-E3/52 reliable?
The price and inventory of SMBG45C-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 SMBG45C-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBG45C-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG45C-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG45C-E3/52?
SMBG45C-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG45C-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 SMBG45C-E3/52?
For technical support, including SMBG45C-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG45C-E3/52 requirements.
6.How does Aetrix verify that SMBG45C-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG45C-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 SMBG45C-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBG45C-E3/52?
All SMBG45C-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG45C-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 SMBG45C-E3/52 part is unused and in its original packaging.
Return procedure for SMBG45C-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG45C-E3/52 Tags
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