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Vishay General Semiconductor - Diodes Division SMBG45CA-E3/52
- Part No.:
- SMBG45CA-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG45CA-E3/52.pdf
- Description:
- TVS DIODE 45VWM 72.7VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,097
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Product details
Overview
SMBG45CA-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 45 V stand-off voltage (VWM), 50.0–55.3 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 µs), clamping voltage of 72.7 V at 8.3 A, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SMBG45CA-E3/52 datasheet, SMBG45CA-E3/52 pinout, SMBG45CA-E3/52 application, or SMBG45CA-E3/52 equivalent, this device is selected for robust ESD and surge protection in bidirectional signal paths where low clamping ratio, fast response (<1 ns), and stable performance across -55 °C to +150 °C are required.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, with identical VBR, IPPM, and VC specifications for positive and negative surges. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and repeatable clamping behavior under repetitive transients.
The SMBG45CA-E3/52 uses a planar construction in DO-215AA package with matte tin-plated leads, rated for MSL Level 1 (260 °C reflow), and achieves thermal resistance of 100 °C/W (junction-to-ambient) when mounted on 5.0 mm × 5.0 mm copper pads - critical for sustained surge handling in compact layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 45 V - Maximum continuous reverse operating voltage before clamping begins; defines safe signal swing margin. |
| VBR (min/max) | 50.0 V / 55.3 V at 1 mA - Ensures reliable turn-on within tight tolerance for predictable transient suppression timing. |
| VC @ IPPM | 72.7 V at 8.3 A - Clamped voltage during 10/1000 µs surge; determines maximum stress on downstream ICs. |
| PPPM | 600 W - Peak pulse power rating; supports high-energy transients like ISO 7637-2 Pulse 1/2a/5a in automotive systems. |
| ID @ VWM | ≤1.0 µA - Ultra-low leakage preserves signal integrity in high-impedance sensor or communication lines. |
| TJ range | -55 °C to +150 °C - Enables deployment in under-hood automotive, industrial motor drives, and outdoor telecom equipment. |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, bidirectional configuration with no polarity marking - terminals are symmetrical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (bidirectional) | Surge current path (both directions) | Identical terminal behavior in either polarity; connects across protected line and ground or differential pair without orientation dependency. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping symmetry | Matched VBR, VC, and IPPM in both directions enables single-device protection of AC-coupled or floating signal lines. |
| AEC-Q101 qualification | Validated for automotive applications including engine control units, ADAS sensors, and infotainment interfaces requiring zero-failure reliability. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage exposure to protected ICs compared to higher-ratio TVS devices, reducing risk of latch-up or gate oxide damage. |
| MSL Level 1 moisture sensitivity | Allows standard SMT reflow without baking, simplifying manufacturing and reducing assembly cost and yield loss. |
Applications
| Automotive CAN Bus Protection | Industrial Sensor Signal Lines |
|---|---|
Use Scenario: Protecting CAN_H/CAN_L differential pair against load dump, jump-start spikes, and ESD per ISO 10605. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector entry point, shunting surge energy to chassis ground before reaching CAN transceiver. Use Value: Maintains CAN signal integrity up to 1 Mbps by limiting differential overvoltage to ≤72.7 V while adding <0.5 pF parasitic capacitance (typ.) at 0 V bias. | Use Scenario: Shielding 4–20 mA current loop or RS-485 bus in factory automation PLC I/O modules from inductive switching transients. IC Role / Device Role / Timing Role: Primary front-end surge suppressor on field-side signal traces, coordinated with series impedance and filtering. Use Value: Withstands ≥1000 repetitive 600 W surges (10/1000 µs) without parameter shift, ensuring long-term protection stability in harsh EMI environments. |
| Automotive Infotainment USB Interface | Telecom Ethernet PHY Protection |
Use Scenario: Safeguarding USB 2.0 D+/D- lines in head unit or telematics control unit against hot-plug ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed adjacent to USB connector, referenced to system ground. Use Value: Delivers <1 ns response time and ≤1.0 µA leakage at 45 V, preventing data corruption while meeting IEC 61000-4-2 ±15 kV contact discharge requirements. | Use Scenario: Protecting 10/100/1000BASE-T Ethernet PHY transformer center taps and MDI lines from lightning-induced surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: Secondary-level TVS used in conjunction with gas discharge tubes (GDTs) and common-mode chokes for staged surge suppression. Use Value: Provides precise clamping at 72.7 V to prevent PHY IC damage during 10/700 µs telecom surges, with thermal design supporting >1000 cycles at full rating. |
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), but lower PPPM = 600 W (same rating), slightly higher VC = 73.0 V at 8.3 A; identical SMB (DO-214AA) footprint but different package outline (SMB vs SMBG). | SMBJ45CA-E3/52 has larger pad area requirement and 20 % higher RθJA; less suitable for ultra-dense PCBs. | Select SMBG45CA-E3/52 when board space is constrained and thermal pad layout matches DO-215AA dimensions. |
| SMCJ45CA-E3/52 | Same VWM and VBR, but higher PPPM = 1500 W and larger SMC (DO-214AB) package; VC = 73.0 V at 20.8 A. | Used where higher single-event surge margin is needed (e.g., DC power input rails), not signal-line protection. | Choose SMBG45CA-E3/52 for signal integrity-critical, space-constrained locations; use SMCJ45CA-E3/52 only when 1500 W rating is mandatory and layout allows larger footprint. |
Compared with SMBJ45CA-E3/52 and SMCJ45CA-E3/52, the SMBG45CA-E3/52 delivers optimal balance of surge robustness, compact DO-215AA packaging, and automotive-grade reliability - making it preferred for high-density, AEC-Q101-compliant signal-line protection where thermal management and board area are tightly constrained.
Availability
SMBG45CA-E3/52 is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, telecom infrastructure, and consumer infotainment systems requiring stable component supply and long-term lifecycle support.
Supply support for SMBG45CA-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 automotive qualification.
The SMBG series was engineered specifically for high-reliability, surface-mount transient suppression in automotive and industrial environments - prioritizing AEC-Q101 compliance, low-profile packaging, and consistent clamping performance across temperature and lifetime.
FAQ
What is the breakdown voltage tolerance for SMBG45CA-E3/52?
The SMBG45CA-E3/52 has a specified breakdown voltage (VBR) range of 50.0 V to 55.3 V at 1 mA test current, representing a ±5.5 % tolerance about the nominal 52.65 V midpoint. This tight distribution ensures consistent clamping onset across production lots and supports deterministic circuit protection design without derating overhead.
Is SMBG45CA-E3/52 suitable for protecting USB 2.0 differential pairs?
Yes, SMBG45CA-E3/52 is suitable for USB 2.0 D+/D- protection due to its bidirectional symmetry, low leakage (<1.0 µA), and typical junction capacitance of <30 pF at 0 V (per Vishay curve Fig. 4). Its 72.7 V clamping voltage safely limits stress on USB transceivers while maintaining signal integrity up to 480 Mbps - provided layout minimizes trace inductance and grounds the TVS directly to a low-impedance reference plane.
Does SMBG45CA-E3/52 require orientation during PCB placement?
No, SMBG45CA-E3/52 does not require orientation during PCB placement because it is a bidirectional device with no cathode marking or polarity designation. The SMBG (DO-215AA) package has symmetrical terminals, and electrical behavior is identical regardless of mounting direction - simplifying automated assembly and eliminating orientation-related assembly errors.
What is the maximum surge current SMBG45CA-E3/52 can handle in a single event?
The SMBG45CA-E3/52 can handle a peak pulse current (IPPM) of 8.3 A under the standard 10/1000 µs waveform, corresponding to its 600 W peak pulse power rating. This value is measured with device mounted on 5.0 mm × 5.0 mm copper pads per JEDEC standards; actual single-event capability may decrease with smaller pads or elevated ambient temperature.
How does SMBG45CA-E3/52 differ from unidirectional variants like SMBG45A-E3/52?
The SMBG45CA-E3/52 is bidirectional with symmetrical clamping in both polarities and no polarity band, whereas SMBG45A-E3/52 is unidirectional with a cathode band and conducts only in reverse bias. SMBG45CA-E3/52 supports AC-coupled or floating lines (e.g., CAN, RS-485), while SMBG45A-E3/52 is limited to DC-biased lines like power rails or single-ended digital signals - making SMBG45CA-E3/52 the correct choice for differential or alternating signal protection.
SMBG45CA-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):
- 45V
- Voltage - Breakdown (Min):
- 50V
- Voltage - Clamping (Max) @ Ipp:
- 72.7V
- Current - Peak Pulse (10/1000µs):
- 8.3A
- 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)
SMBG45CA-E3/52 FAQ
1.How can I place an order for SMBG45CA-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG45CA-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 SMBG45CA-E3/52 reliable?
The price and inventory of SMBG45CA-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 SMBG45CA-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBG45CA-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG45CA-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG45CA-E3/52?
SMBG45CA-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG45CA-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 SMBG45CA-E3/52?
For technical support, including SMBG45CA-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG45CA-E3/52 requirements.
6.How does Aetrix verify that SMBG45CA-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG45CA-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 SMBG45CA-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBG45CA-E3/52?
All SMBG45CA-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG45CA-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 SMBG45CA-E3/52 part is unused and in its original packaging.
Return procedure for SMBG45CA-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG45CA-E3/52 Tags
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