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Vishay General Semiconductor - Diodes Division SMBG43CA-E3/5B
- Part No.:
- SMBG43CA-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG43CA-E3/5B.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,307
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Product details
Overview
SMBG43CA-E3/5B from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for robust overvoltage protection on signal and power lines. It features a 43 V stand-off voltage (VWM), 47.8–52.8 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 μs), clamping voltage of 69.4 V at 8.6 A, and AEC-Q101 qualification for automotive use.
For engineers reviewing the SMBG43CA-E3/5B datasheet, SMBG43CA-E3/5B pinout, SMBG43CA-E3/5B application, or SMBG43CA-E3/5B equivalent, this device is selected for high-reliability transient suppression in automotive sensor interfaces, industrial I/O ports, and telecom line protection where bidirectional surge immunity and low clamping ratio are critical.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical electrical characteristics in forward and reverse directions. Its glass-passivated junction ensures stable breakdown behavior, fast response time (<1 ns), and low incremental surge resistance - enabling effective clamping of ESD, lightning-induced surges, and inductive switching transients.
Designed for surface-mount assembly on PCBs with 5.0 mm × 5.0 mm copper pads per terminal, it supports repetitive surge duty cycles up to 0.01 % and operates across -55 °C to +150 °C junction temperature range. The device meets UL 497B recognition and complies with J-STD-020 MSL Level 1 reflow profile (260 °C peak).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin for protected circuitry. |
| VBR (min/max) | 47.8 V / 52.8 V at 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on during transients. |
| VC @ IPPM | 69.4 V at 8.6 A - Clamping voltage under 10/1000 μs surge; limits downstream voltage stress to safe levels. |
| PPPM | 600 W - Peak pulse power handling capability; sustains high-energy transients without failure. |
| IPPM | 8.6 A - Peak pulse current supported at rated waveform; determines minimum trace/solder joint robustness. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive and industrial environments. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing. |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 6.48 mm × 3.94 mm × 2.10 mm (L × W × H); matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Terminal A | One side of symmetrical junction; connects to line under protection (e.g., CAN_H or RS-485 A). |
| Cathode | Terminal B | Other side of symmetrical junction; connects to same line (e.g., CAN_H or RS-485 A) - bidirectional operation requires no polarity assignment. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential lines (e.g., CAN, RS-485) without polarity concerns. |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV, 2 Ω source) when mounted on recommended 5.0 mm × 5.0 mm pads. |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes overvoltage stress on downstream ICs compared to higher-ratio suppressors. |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body electronics, and ADAS sensor interfaces requiring long-term field reliability. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking - simplifies SMT manufacturing flow. |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
Use Scenario: Protecting ABS wheel speed sensor outputs from load dump and ISO 7637-2 pulses in vehicle chassis wiring harnesses. IC Role / Device Role / Timing Role: Bidirectional TVS placed between sensor output line and ground, clamping transients before they reach MCU input pins. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V automotive microcontrollers while maintaining signal integrity during 100 V/50 ms load dump events. | Use Scenario: Safeguarding RS-485 transceivers in factory automation PLCs exposed to motor drive noise and ground loop surges. IC Role / Device Role / Timing Role: Connected across differential pair (A–B) and/or to ground, suppressing common-mode and differential-mode transients. Use Value: Enables reliable 10 Mbps data transmission over 1200 m cable runs by limiting voltage excursions to <70 V during 4 kV EFT bursts. |
| Telecom Line Interface | Consumer USB Port ESD Protection |
Use Scenario: Shielding xDSL line drivers and receivers from lightning-induced surges on outdoor copper pairs. IC Role / Device Role / Timing Role: Placed at line interface before transformer coupling, absorbing longitudinal surges before signal conditioning stages. Use Value: Meets ITU-T K.21 basic protection level with 600 W rating and sub-1 ns response, reducing need for multi-stage protection. | Use Scenario: Adding secondary-level surge immunity to USB 2.0 D+/D− lines in smart home hubs subjected to user-handling ESD. IC Role / Device Role / Timing Role: Bidirectional clamp between D+ and D−, shunting ±8 kV contact ESD (IEC 61000-4-2) away from PHY transceiver. Use Value: Maintains USB enumeration reliability after repeated ESD events due to low leakage (<1 μA at 43 V) and stable VBR. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43CA-E3/5B | Same VWM/VBR/VC, but lower PPPM = 600 W (same rating) and higher IPPM = 9.6 A; SMBJ package has larger thermal pad area (7.0 mm × 4.5 mm). | Suitable for higher-power layouts where board space allows larger footprint; better thermal dissipation under sustained surge conditions. | Select SMBJ43CA-E3/5B when PCB layout permits larger pad area and thermal performance is prioritized over compactness. |
| 1.5KE43CA | Through-hole DO-201 package; identical electrical specs but higher RθJA (~50 °C/W vs. 100 °C/W), lower surge repetition tolerance, no AEC-Q101 qualification. | Limited to non-automotive, low-volume, or prototyping use; not suitable for automated SMT production or automotive qualification requirements. | Choose 1.5KE43CA only for legacy through-hole designs or cost-sensitive non-automotive applications lacking AEC-Q101 mandate. |
Compared with SMBG43CA-E3/5B, SMBJ43CA-E3/5B offers improved thermal management in high-duty-cycle surge environments, while 1.5KE43CA trades automotive reliability and SMT compatibility for through-hole simplicity and lower unit cost in non-qualified systems.
Availability
SMBG43CA-E3/5B is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial RS-485 networks, and telecom line protection requiring stable component supply, AEC-Q101 compliance, and consistent surge performance across production batches.
Supply support for SMBG43CA-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, precision, and automotive-grade qualification.
The SMBG series was developed specifically for high-density, high-reliability surface-mount transient suppression in automotive, industrial, and communications infrastructure - balancing compact size, AEC-Q101 validation, and repeatable clamping performance.
FAQ
What is the maximum clamping voltage of SMBG43CA-E3/5B under a 10/1000 μs surge?
The SMBG43CA-E3/5B clamps to a maximum of 69.4 V at its rated peak pulse current of 8.6 A under a 10/1000 μs waveform. This value is measured per Figure 1 in Vishay document 88456 and reflects worst-case device variation across temperature and production lot. The SMBG43CA-E3/5B maintains this clamping performance consistently due to its glass-passivated junction and tight VBR tolerance (47.8–52.8 V).
Is SMBG43CA-E3/5B suitable for protecting CAN bus lines?
Yes, SMBG43CA-E3/5B is widely used for CAN FD and classical CAN bus protection. Its bidirectional symmetry, 43 V VWM (compatible with 12 V automotive supply rails), and 69.4 V clamping voltage ensure safe operation within ISO 11898-2 voltage limits. The SMBG43CA-E3/5B's AEC-Q101 qualification further validates its suitability for automotive CAN nodes in engine control, body modules, and ADAS systems.
Does SMBG43CA-E3/5B have polarity markings on the package?
No, SMBG43CA-E3/5B has no polarity markings because it is a bidirectional TVS diode. Unlike unidirectional variants (e.g., SMBG43A), the SMBG43CA-E3/5B uses a symmetrical junction structure - both terminals function identically regardless of voltage polarity. This eliminates orientation errors during automated placement and simplifies layout for differential or AC-coupled signal lines.
What is the thermal resistance of SMBG43CA-E3/5B, and how does it affect layout?
The SMBG43CA-E3/5B 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 assumes minimal internal copper; designers must allocate adequate copper area around both terminals to maintain surge derating curves. The SMBG43CA-E3/5B's RθJA directly impacts its ability to survive repetitive surges - undersized pads cause premature thermal runaway during burst-mode testing.
How does the AEC-Q101 qualification of SMBG43CA-E3/5B impact its use in industrial applications?
The AEC-Q101 qualification of SMBG43CA-E3/5B provides assurance of robustness beyond standard industrial temperature and reliability requirements - including extended temperature cycling (-55 °C to +150 °C), high-temperature reverse bias (HTRB), and ESD testing per JS-001. While not mandatory for industrial use, this qualification makes SMBG43CA-E3/5B ideal for harsh-environment applications such as factory automation controllers, railway signaling, and outdoor telecom equipment where long-term field reliability is critical.
SMBG43CA-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):
- 43V
- Voltage - Breakdown (Min):
- 47.8V
- Voltage - Clamping (Max) @ Ipp:
- 69.4V
- Current - Peak Pulse (10/1000µs):
- 8.6A
- 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)
SMBG43CA-E3/5B FAQ
1.How can I place an order for SMBG43CA-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG43CA-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 SMBG43CA-E3/5B reliable?
The price and inventory of SMBG43CA-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 SMBG43CA-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBG43CA-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG43CA-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG43CA-E3/5B?
SMBG43CA-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG43CA-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 SMBG43CA-E3/5B?
For technical support, including SMBG43CA-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG43CA-E3/5B requirements.
6.How does Aetrix verify that SMBG43CA-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG43CA-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 SMBG43CA-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBG43CA-E3/5B?
All SMBG43CA-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG43CA-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 SMBG43CA-E3/5B part is unused and in its original packaging.
Return procedure for SMBG43CA-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG43CA-E3/5B Tags
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