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Vishay General Semiconductor - Diodes Division SMBG45CA-E3/5B
- Part No.:
- SMBG45CA-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG45CA-E3/5B.pdf
- Description:
- TVS DIODE 45VWM 72.7VC DO215AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMBG45CA-E3/5B 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 a 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 - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMBG45CA-E3/5B datasheet, SMBG45CA-E3/5B pinout, SMBG45CA-E3/5B application, or SMBG45CA-E3/5B equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification, low leakage (<1.0 μA at 45 V), MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, with identical VBR, VC, and IPPM characteristics in forward and reverse directions. Its glass-passivated junction ensures stable breakdown behavior and low incremental surge resistance under repetitive transients.
Designed for high-reliability environments, SMBG45CA-E3/5B meets AEC-Q101 stress testing requirements and supports operation from −55 °C to +150 °C junction temperature, with thermal resistance RθJA = 100 °C/W on standard 0.2" × 0.2" copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 45 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 36 V nominal systems. |
| VBR (min/max) | 50.0 V / 55.3 V at 1 mA - Confirmed breakdown threshold range ensuring consistent turn-on across production lots. |
| VC @ IPPM | 72.7 V at 8.3 A - Clamping voltage limits downstream IC stress during 10/1000 μs surges (e.g., ISO 7637-2 Pulse 1/2a). |
| PPPM | 600 W - Peak pulse power handling capability with 0.01% duty cycle; validated per Fig. 1 derating curve. |
| ID @ VWM | <1.0 μA - Ultra-low reverse leakage preserves signal integrity in high-impedance sensor bias networks. |
| TJ max | +150 °C - Enables use in under-hood automotive modules and industrial motor drives without thermal derating penalties. |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, bidirectional device with no polarity marking; case conforms to JEDEC DO-215AA outline, 0.255" × 0.155" footprint, 0.030" height, matte tin-plated leads compliant with J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive half-cycle) | One terminal of symmetrical junction; conducts during positive voltage excursions above VBR. |
| Cathode | Transient current entry (negative half-cycle) | Second terminal of symmetrical junction; conducts during negative voltage excursions above |VBR|. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including HTOL, TCT, and ESD-HBM/MM. |
| 600 W peak pulse power (10/1000 μs) | Withstands ISO 7637-2 Pulse 1 (inductive switch-off) and Pulse 2a (load dump initiation) without degradation. |
| MSL Level 1 (260 °C peak reflow) | Compatible with standard lead-free reflow profiles; no pre-baking required prior to assembly. |
| Glass-passivated junction | Ensures stable VBR tolerance and low leakage drift over temperature and lifetime. |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting ABS wheel speed sensors and engine crankshaft position sensors from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across differential sensor output lines (e.g., VR or Hall-effect sensors). Use Value: Limits induced voltage spikes to ≤72.7 V, preventing damage to downstream signal conditioning amplifiers and microcontroller ADC inputs. | Use Scenario: Shielding CANH/CANL lines in factory automation gateways against ESD (IEC 61000-4-2) and burst noise (IEC 61000-4-4). IC Role / Device Role / Timing Role: Low-capacitance (typ. 100 pF at 0 V) parallel-connected TVS on each bus line, referenced to ground. Use Value: Maintains signal integrity up to 1 Mbps due to symmetrical clamping and <1.0 μA leakage at 45 V standby. |
| Power Supply Input Protection | Telecom Line Card Surge Suppression |
Use Scenario: Safeguarding 48 V DC input rails in PoE-powered switches and base station controllers from lightning-induced surges. IC Role / Device Role / Timing Role: Primary-level TVS placed upstream of DC-DC converters and hot-swap controllers. Use Value: Absorbs 600 W transient energy without failure, enabling compliance with IEC 61000-4-5 (10/700 μs, 2 kV line-to-ground). | Use Scenario: Front-end protection of xDSL line drivers and POTS interface circuits exposed to AC ring voltage surges and tip/ring reversals. IC Role / Device Role / Timing Role: Bidirectional clamp across tip/ring pair, rated for continuous 45 V AC RMS operation. Use Value: Symmetric VBR (50.0–55.3 V) ensures equal clamping in both polarity states, eliminating need for dual unidirectional devices. |
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/VBR/VC, but lower PPPM = 600 W (same rating), different package: SMB (DO-214AA), larger thermal pad area. | SMB offers higher RθJL (15 °C/W vs. 20 °C/W) and better heat dissipation in high-duty-cycle scenarios. | Select SMBJ45CA-E3/5B when board layout allows larger footprint and thermal performance is prioritized over space-constrained designs. |
| 1.5KE45CA | Higher PPPM = 1500 W, axial DO-15 package, slower response time (~1.0 ns vs. sub-1 ns), no AEC-Q101 qualification. | Used in non-automotive industrial power supplies where size and qualification are secondary to surge margin. | Choose 1.5KE45CA only for cost-sensitive, non-automotive applications requiring higher single-pulse energy absorption. |
Compared with SMBG45CA-E3/5B, SMBJ45CA-E3/5B provides identical electrical protection in a thermally superior but larger package, while 1.5KE45CA trades AEC-Q101 compliance and SMT compatibility for higher peak power in through-hole form - making SMBG45CA-E3/5B optimal for space-constrained, automotive-grade SMT designs.
Availability
SMBG45CA-E3/5B is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial CAN bus nodes, and telecom line card protection requiring stable component supply, AEC-Q101 traceability, and RoHS-compliant manufacturing.
Supply support for SMBG45CA-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, automotive qualification, and high-volume manufacturability.
The SMBG series was developed specifically for surface-mount transient suppression in space-constrained, high-reliability applications - combining AEC-Q101 qualification, low-profile packaging, and precise bidirectional clamping for modern automotive and industrial electronics.
FAQ
What is the clamping voltage of SMBG45CA-E3/5B at its rated peak pulse current?
The SMBG45CA-E3/5B has a maximum clamping voltage (VC) of 72.7 V at 8.3 A peak pulse current (IPPM) under 10/1000 μs waveform conditions. This value is measured per Figure 1 in Vishay document 88456 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMBG45CA-E3/5B maintains this clamping performance bidirectionally, ensuring consistent protection regardless of transient polarity.
Is SMBG45CA-E3/5B qualified for automotive applications?
Yes, SMBG45CA-E3/5B is AEC-Q101 qualified, as confirmed in the Vishay datasheet (Document Number 88456, Revision 09-Jan-2024). It undergoes stress testing including high-temperature operating life, temperature cycling, and ESD-HBM up to 8 kV. The "HE3" and "HM3" base part variants explicitly denote AEC-Q101 qualification, and the "E3/5B" suffix indicates RoHS-compliant, industrial-grade construction compatible with automotive production requirements. SMBG45CA-E3/5B is routinely used in engine control units and ADAS sensor modules.
Does SMBG45CA-E3/5B have polarity markings on the package?
No, SMBG45CA-E3/5B does not feature polarity markings because it is a bidirectional TVS diode. Unlike unidirectional types (e.g., SMBG45A), which use a cathode band to indicate polarity, bidirectional devices such as SMBG45CA-E3/5B have symmetrical electrical characteristics in both directions and therefore omit external markings. The SMBG (DO-215AA) package is physically identical for both variants, and orientation during placement has no functional impact on SMBG45CA-E3/5B operation.
What is the maximum reverse leakage current for SMBG45CA-E3/5B at its stand-off voltage?
The maximum reverse leakage current (ID) for SMBG45CA-E3/5B is 1.0 μA at its 45 V stand-off voltage (VWM), tested at TA = 25 °C. This ultra-low leakage preserves signal fidelity in high-impedance circuits such as sensor bias networks and analog front-ends. The value is specified in Table "ELECTRICAL CHARACTERISTICS" on page 2 of Vishay document 88456 and applies equally in both directions due to the device's bidirectional symmetry. SMBG45CA-E3/5B maintains this leakage performance across its full operating temperature range.
Can SMBG45CA-E3/5B be used in place of a unidirectional TVS like SMBG45A?
No - SMBG45CA-E3/5B is not a drop-in replacement for unidirectional SMBG45A. While both share identical VWM (45 V), VBR, and VC ratings, SMBG45CA-E3/5B provides symmetrical clamping in both polarities, whereas SMBG45A clamps only in reverse and conducts forward like a standard diode. Substituting SMBG45CA-E3/5B for SMBG45A in DC-biased circuits may cause unintended conduction. Always verify circuit topology: SMBG45CA-E3/5B is intended for AC-coupled or floating lines; SMBG45A suits DC-rail protection with defined polarity. SMBG45CA-E3/5B must be selected intentionally for bidirectional needs.
SMBG45CA-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:
- 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-E3/5B FAQ
1.How can I place an order for SMBG45CA-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG45CA-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 SMBG45CA-E3/5B reliable?
The price and inventory of SMBG45CA-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 SMBG45CA-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBG45CA-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG45CA-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG45CA-E3/5B?
SMBG45CA-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG45CA-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 SMBG45CA-E3/5B?
For technical support, including SMBG45CA-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG45CA-E3/5B requirements.
6.How does Aetrix verify that SMBG45CA-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG45CA-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 SMBG45CA-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBG45CA-E3/5B?
All SMBG45CA-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG45CA-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 SMBG45CA-E3/5B part is unused and in its original packaging.
Return procedure for SMBG45CA-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG45CA-E3/5B Tags
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