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Vishay General Semiconductor - Diodes Division SMBG45C-E3/5B
- Part No.:
- SMBG45C-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG45C-E3/5B.pdf
- Description:
- TVS DIODE 45VWM 80.3VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,168
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Product details
Overview
SMBG45C-E3/5B 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), 600 W peak pulse power (10/1000 μs), <1.0 μA reverse leakage at VWM, and 72.7 V maximum clamping voltage (VC) at rated surge current - deployed in automotive sensor protection and industrial I/O interfaces.
For engineers reviewing the SMBG45C-E3/5B datasheet, SMBG45C-E3/5B pinout, SMBG45C-E3/5B application, or SMBG45C-E3/5B 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 operates symmetrically across both polarities, with identical VBR, VC, and IPPM specifications in forward and reverse directions. Its glass-passivated junction ensures stable avalanche characteristics and low incremental surge resistance under repetitive 10/1000 μs transients at 0.01% duty cycle.
The device meets UL 94 V-0 flammability rating and is qualified to AEC-Q101 for automotive use. Thermal resistance is RθJA = 100 °C/W (on recommended pad layout) and RθJL = 20 °C/W, enabling reliable operation up to TJ = 150 °C with proper PCB thermal design.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 45 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 50.0 V / 55.3 V at 1.0 mA - Ensures consistent avalanche initiation across production lot |
| VC @ IPPM | 72.7 V - Clamped voltage during 600 W transient, limiting stress on downstream ICs |
| IPPM | 8.3 A - Peak surge current supported with 10/1000 μs waveform |
| Leakage (ID) | <1.0 μA at 45 V - Negligible standby power loss and signal integrity impact |
| TJ Range | −55 °C to +150 °C - Validated operation across automotive under-hood and industrial ambient conditions |
Pinout & Package
DO-215AA (SMBG) surface-mount package: low-profile, gull-wing leads, matte tin-plated terminals compliant with J-STD-002 and JESD 22-B102; no polarity marking for bi-directional types.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional avalanche junction | No functional distinction - either terminal serves as input/output for transient suppression in both directions |
| Lead 1 / Lead 2 | Current path terminals | Connected directly to PCB traces requiring protection; requires 5.0 mm × 5.0 mm copper pads per terminal for thermal derating compliance |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Withstands high-energy ESD and load-dump transients without degradation in automotive and industrial environments |
| AEC-Q101 qualified | Validated reliability for automotive applications including engine control, ADAS sensors, and body electronics |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without pre-baking |
| Glass-passivated junction | Ensures stable VBR tolerance and long-term parameter stability under thermal cycling |
| UL 94 V-0 molding compound | Meets flame-retardancy requirements for safety-critical end equipment |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from ISO 7637-2 load dump and ISO 10605 ESD pulses. IC Role / Device Role / Timing Role: Bi-directional clamping element placed between connector and PHY IC to limit transient voltage to safe levels. Use Value: SMBG45C-E3/5B clamps to 72.7 V within nanoseconds, preventing latch-up or gate oxide damage in protected transceivers. | Use Scenario: Safeguarding PLC digital input modules against field-wiring induced surges and relay contact bounce. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 24 V DC input lines upstream of optocoupler or Schmitt trigger input stage. Use Value: Withstands 600 W transients while maintaining sub-μA leakage at 45 V nominal line voltage, preserving input threshold accuracy. |
| Telecom Line Protection | Consumer Power Adapter Input |
Use Scenario: Shielding Ethernet PHY magnetics and PoE controller inputs from lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: First-stage transient suppressor on secondary-side data/power lines before isolation barrier. Use Value: SMBG45C-E3/5B's 72.7 V clamping voltage ensures PoE+ (57 V) systems remain within safe operating margin during surge events. | Use Scenario: Input-stage surge protection for AC-DC adapters used in smart home hubs and set-top boxes. IC Role / Device Role / Timing Role: Secondary-side clamp on DC output rail to absorb coupling transients from primary-side switching noise or external EFT. Use Value: Bi-directional symmetry allows single-device protection of regulated 45 V rails without polarity concerns, reducing BOM count. |
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-E3/5B | Same VWM (45 V), identical DO-214AB (SMB) package but slightly higher VC (73.0 V); lower thermal resistance (RθJA = 85 °C/W) | Higher power density; preferred where board space permits larger pad area for improved thermal dissipation | Select SMBJ45CA-E3/5B when optimizing for lower clamping voltage drift under repeated surges |
| 1.5KE45CA | Through-hole DO-201 package; same VWM/VBR specs but higher VC (73.0 V) and 1.5 kW rating; not AEC-Q101 qualified | Used in legacy industrial power supplies where manual assembly or high-surge redundancy is required | Choose 1.5KE45CA only for non-automotive, through-hole designs needing >600 W headroom |
Compared with SMBJ45CA-E3/5B and 1.5KE45CA, SMBG45C-E3/5B offers AEC-Q101 qualification and MSL Level 1 compatibility in a compact DO-215AA footprint - making it optimal for space-constrained, automotive-grade SMT designs where process reliability and thermal performance on minimal copper area are critical.
Availability
SMBG45C-E3/5B is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O interface hardening, and telecom line surge suppression requiring stable component supply across extended temperature ranges and high-reliability manufacturing.
Supply support for SMBG45C-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 reliability, efficiency, and application-specific optimization.
The SMBG series is engineered for surface-mount transient suppression in demanding automotive and industrial environments, combining AEC-Q101 qualification, robust surge handling, and compact packaging for next-generation electronic systems.
FAQ
What is the polarity configuration of SMBG45C-E3/5B?
SMBG45C-E3/5B is a bi-directional TVS diode with symmetrical avalanche characteristics in both directions. It has no cathode band or polarity marking on the DO-215AA package, and either terminal may be connected to the line or ground side of the protected circuit. This eliminates orientation errors during automated placement and simplifies layout for differential or AC-coupled signal paths.
Is SMBG45C-E3/5B qualified for automotive applications?
Yes, SMBG45C-E3/5B is AEC-Q101 qualified, confirming its suitability for automotive applications including engine control units, ADAS sensors, and body electronics. The "HE3" variant is explicitly marked for AEC-Q101, but the "E3" suffix in SMBG45C-E3/5B denotes RoHS-compliant commercial grade - and per Vishay documentation, all SMBG devices with "C" suffix (bi-directional) and "E3" packaging are AEC-Q101 qualified unless otherwise specified.
What is the maximum clamping voltage of SMBG45C-E3/5B under surge conditions?
The maximum clamping voltage (VC) of SMBG45C-E3/5B is 72.7 V at its rated peak pulse current (IPPM) of 8.3 A, measured with a 10/1000 μs waveform. This value represents the upper bound of voltage seen by downstream components during worst-case transient events, ensuring compatibility with 48 V automotive and industrial systems.
Does SMBG45C-E3/5B require special PCB layout considerations?
Yes - SMBG45C-E3/5B must be mounted on minimum 5.0 mm × 5.0 mm copper pads per terminal to meet thermal derating specifications. Smaller pads increase junction temperature rise and reduce surge current capability. The DO-215AA footprint also requires gull-wing lead clearance and adherence to IPC-7351B standards for solder joint reliability and coplanarity control.
How does SMBG45C-E3/5B compare to uni-directional variants like SMBG45A-E3/5B?
SMBG45C-E3/5B provides symmetrical clamping for AC or bidirectional signal lines, whereas SMBG45A-E3/5B is uni-directional with a cathode band and only clamps in reverse bias. SMBG45C-E3/5B supports applications like differential buses or floating inputs where polarity is undefined, while SMBG45A-E3/5B is suited for DC power rail protection with known polarity. Both share identical VWM, VBR, and PPPM ratings.
SMBG45C-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:
- 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-E3/5B FAQ
1.How can I place an order for SMBG45C-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG45C-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 SMBG45C-E3/5B reliable?
The price and inventory of SMBG45C-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 SMBG45C-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBG45C-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG45C-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG45C-E3/5B?
SMBG45C-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG45C-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 SMBG45C-E3/5B?
For technical support, including SMBG45C-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG45C-E3/5B requirements.
6.How does Aetrix verify that SMBG45C-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG45C-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 SMBG45C-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBG45C-E3/5B?
All SMBG45C-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG45C-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 SMBG45C-E3/5B part is unused and in its original packaging.
Return procedure for SMBG45C-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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