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Vishay General Semiconductor - Diodes Division SMBG43CA-M3/52
- Part No.:
- SMBG43CA-M3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG43CA-M3/52.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,317
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Product details
Overview
SMBG43CA-M3/52 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for clamping ESD and surge transients on signal/power lines. It features 43 V stand-off voltage (VWM), 47.8–52.8 V breakdown (VBR at 1 mA), 69.4 V max clamping voltage (VC) at 8.6 A peak pulse current, and 600 W peak pulse power (10/1000 µs). It is AEC-Q101 qualified and used to protect automotive sensor interfaces and industrial I/O lines.
For engineers reviewing the SMBG43CA-M3/52 datasheet, SMBG43CA-M3/52 pinout, SMBG43CA-M3/52 application, or SMBG43CA-M3/52 equivalent, key selection criteria include bidirectional clamping capability, 43 V working voltage compatibility with 48 V systems, MSL Level 1 reflow tolerance, halogen-free RoHS compliance (M3 suffix), and DO-215AA footprint suitability for automated SMT assembly.
Technical Context
This device operates as a voltage-clamped surge protector with symmetrical avalanche behavior in both polarities, enabling protection of AC-coupled or floating signal paths without polarity concerns. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM), while the low incremental surge resistance supports fast energy dissipation during transient events.
The SMBG43CA-M3/52 is rated for 150 °C maximum junction temperature and exhibits thermal resistance of 100 °C/W (junction-to-ambient, on 5.0 mm × 5.0 mm copper pads). It meets UL 497B recognition and complies with ANSI/IEEE C62.35 for surge protector classification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - Maximum continuous reverse operating voltage before clamping begins; matches nominal 48 V rail derating. |
| VBR (min/max) | 47.8 V / 52.8 V at 1 mA - Confirmed breakdown range ensures reliable turn-on margin above VWM. |
| VC @ IPPM | 69.4 V at 8.6 A - Clamping voltage limits downstream IC stress during 600 W transient events. |
| PPPM | 600 W (10/1000 µs) - Peak surge power handling capacity for automotive load-dump and ISO 7637-2 pulse 5a. |
| TJ max | 150 °C - Enables operation in under-hood automotive environments and industrial enclosures. |
| Package | SMBG (DO-215AA) - Standardized 2-pin surface-mount outline with 0.235" × 0.155" footprint and gull-wing leads. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing. |
Pinout & Package
SMBG43CA-M3/52 uses the SMBG (DO-215AA) package: a 2-terminal, bidirectional surface-mount device with no polarity marking. The case is molded compound meeting UL 94 V-0; terminals are matte tin-plated for J-STD-002 solderability. Mounting requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal per Vishay's thermal derating guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | One side of symmetrical avalanche junction; connects to protected line or ground reference depending on layout. |
| Cathode | Transient current entry (positive polarity) | Other side of symmetrical junction; functionally identical to Anode in bidirectional operation; no band marking. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., CAN, RS-485), or ungrounded sensor outputs without polarity constraints. |
| 600 W peak pulse power | Withstands ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 Combination Wave surges up to 4 kV in typical PCB layouts. |
| AEC-Q101 qualification | Validated for automotive applications including engine control units, body electronics, and ADAS sensor modules requiring long-term field reliability. |
| Halogen-free & RoHS compliant (M3) | Meets automotive OEM environmental requirements and JEDEC JESD201 Class 2 whisker resistance for lead finish integrity. |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow profiles without pre-baking, reducing manufacturing complexity and cost. |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine bay or chassis modules exposed to load dump and inductive switching noise. IC Role / Device Role / Timing Role: Voltage-clamping TVS placed between signal line and ground, absorbing transients before they reach ADC input or signal conditioner IC. Use Value: Limits clamped voltage to ≤69.4 V, preventing damage to 3.3 V or 5 V interface ICs while maintaining signal integrity via low capacitance (<100 pF at 0 V). | Use Scenario: Safeguarding 24 V DC digital input channels on PLC modules against field-wiring induced surges and electrostatic discharge. IC Role / Device Role / Timing Role: Bidirectional shunt protector across input terminals, diverting surge current away from optocoupler or Schmitt-trigger input circuitry. Use Value: Withstands repeated 600 W transients without degradation, ensuring >100,000 surge cycles per IEC 61000-4-5, extending system maintenance intervals. |
| Automotive CAN Bus Protection | Consumer Power Adapter Input |
Use Scenario: Secondary-level surge suppression on high-speed CAN FD data lines (CANH/CANL) in infotainment and gateway ECUs. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp placed after common-mode choke, protecting transceiver ESD structures without distorting signal edges. Use Value: Junction capacitance <80 pF at 0 V preserves signal rise/fall times for CAN FD bit rates up to 5 Mbps while clamping ±25 kV contact ESD per IEC 61000-4-2. | Use Scenario: Input-stage transient suppression on 48 V input rails of USB-C PD adapters and smart home power supplies. IC Role / Device Role / Timing Role: Primary overvoltage clamp upstream of bridge rectifier and PFC controller, limiting surge propagation into primary-side control ICs. Use Value: 43 V VWM aligns with 48 V nominal input derating, and 69.4 V VC ensures MOSFET and controller ICs remain within safe operating area during lightning-induced surges. |
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-E3/52 | Same VWM/VBR/VC, but SMBJ (DO-214AB) package; 1.5× larger footprint; RθJA = 65 °C/W vs. 100 °C/W. | Higher thermal mass suits higher average power dissipation; less suitable for space-constrained automotive modules. | Select SMBJ43CA-E3/52 only when board layout allows larger pad area and thermal performance outweighs size penalty. |
| SMCJ43CA-M3 | Same electrical specs, but SMC (DO-214AB) package; 2.5× larger than SMBG; RθJA = 40 °C/W; rated for 1500 W PPPM. | Targeted at high-energy industrial surge protection where 600 W is insufficient; not drop-in due to footprint mismatch. | Choose SMCJ43CA-M3 only for applications demanding >1 kW surge rating and where PCB real estate permits larger SMC outline. |
Compared with SMBJ43CA-E3/52 and SMCJ43CA-M3, the SMBG43CA-M3/52 delivers optimal balance of compact DO-215AA footprint, AEC-Q101 qualification, and sufficient 600 W surge handling for automotive and industrial edge-node protection-without over-engineering size or cost.
Availability
SMBG43CA-M3/52 is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC inputs, CAN bus interfaces, and consumer 48 V power adapter designs requiring stable component supply and halogen-free compliance.
Supply support for SMBG43CA-M3/52 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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The SMBG series was developed to deliver AEC-Q101-qualified, space-efficient transient protection for next-generation automotive and industrial electronics where thermal density and automated assembly are critical design constraints.
FAQ
What does the "CA" suffix indicate in SMBG43CA-M3/52?
The "CA" suffix in SMBG43CA-M3/52 denotes a bidirectional configuration, meaning the device provides symmetrical transient voltage suppression in both polarities. This enables protection of AC-coupled signals, differential buses like CAN or RS-485, and ungrounded sensor outputs without requiring polarity-aware placement. Unlike unidirectional variants (e.g., SMBG43A), SMBG43CA-M3/52 has no cathode band marking and exhibits identical VBR and VC characteristics in either direction, as confirmed in Vishay document 88456.
Is SMBG43CA-M3/52 suitable for automotive applications?
Yes, SMBG43CA-M3/52 is AEC-Q101 qualified and explicitly rated for automotive use per Vishay's documentation. It meets requirements for temperature cycling, high-temperature reverse bias (HTRB), and ESD robustness needed in engine control units, body electronics, and ADAS sensor modules. Its 150 °C TJ max, MSL Level 1 reflow rating, and halogen-free M3 construction align with Tier 1 automotive OEM specifications-making SMBG43CA-M3/52 appropriate for under-hood and chassis-mounted systems.
What is the clamping voltage of SMBG43CA-M3/52 and how is it measured?
The maximum clamping voltage (VC) of SMBG43CA-M3/52 is 69.4 V, measured at 8.6 A peak pulse current (IPPM) using a 10/1000 µs double-exponential waveform per IEC 61000-4-5. This value represents the upper limit of voltage seen by downstream circuitry during a 600 W transient event. It is verified under standardized test conditions with the device mounted on 0.2" × 0.2" copper pads, and directly determines the safe operating margin for protected ICs such as CAN transceivers or microcontroller I/O pins.
How does the SMBG (DO-215AA) package compare to SMBJ (DO-214AB) for SMBG43CA-M3/52?
The SMBG (DO-215AA) package of SMBG43CA-M3/52 measures 0.235" × 0.155", making it ~30% smaller than the SMBJ (DO-214AB) outline (0.280" × 0.185"). While both share gull-wing leads and similar thermal pad requirements, SMBG offers higher power density but lower thermal resistance to ambient (RθJA = 100 °C/W vs. 65 °C/W for SMBJ). This trade-off makes SMBG43CA-M3/52 ideal for space-constrained automotive modules where layout area is premium, whereas SMBJ variants suit applications needing greater thermal headroom.
Does SMBG43CA-M3/52 require a heatsink for standard operation?
No, SMBG43CA-M3/52 does not require an external heatsink under normal surge conditions. Its thermal design assumes mounting on minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, which provide adequate heat spreading for single-event 600 W transients. The device's RθJA of 100 °C/W and 150 °C TJ max ensure safe operation in ambient temperatures up to +85 °C during repetitive surge duty cycles ≤0.01%, as specified in Vishay document 88456. PCB copper area serves as the primary thermal path.
SMBG43CA-M3/52 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):
- 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:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBG)
SMBG43CA-M3/52 FAQ
1.How can I place an order for SMBG43CA-M3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG43CA-M3/52 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 SMBG43CA-M3/52 reliable?
The price and inventory of SMBG43CA-M3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG43CA-M3/52 is usually 5 days.
3.What payment methods are accepted for SMBG43CA-M3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG43CA-M3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG43CA-M3/52?
SMBG43CA-M3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG43CA-M3/52 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 SMBG43CA-M3/52?
For technical support, including SMBG43CA-M3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG43CA-M3/52 requirements.
6.How does Aetrix verify that SMBG43CA-M3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG43CA-M3/52 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 SMBG43CA-M3/52 meets industry standards.
7.What is the process for return or replacement of SMBG43CA-M3/52?
All SMBG43CA-M3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG43CA-M3/52, 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 SMBG43CA-M3/52 part is unused and in its original packaging.
Return procedure for SMBG43CA-M3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG43CA-M3/52 Tags
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