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Vishay General Semiconductor - Diodes Division SMBG43CA-M3/5B
- Part No.:
- SMBG43CA-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG43CA-M3/5B.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,748
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Product details
Overview
SMBG43CA-M3/5B from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in the 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-grade reliability.
For engineers reviewing the SMBG43CA-M3/5B datasheet, SMBG43CA-M3/5B pinout, SMBG43CA-M3/5B application, or SMBG43CA-M3/5B equivalent, key selection criteria include bidirectional surge immunity, low clamping ratio (VC/VBR ≈ 1.38), halogen-free RoHS compliance (M3 suffix), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a voltage-clamped shunt protector, responding within picoseconds to transients exceeding its VWM threshold and diverting surge current away from downstream circuitry. Its bidirectional symmetry ensures identical clamping behavior for positive and negative polarity surges, making it suitable for AC-coupled or floating signal paths.
The SMBG43CA-M3/5B uses a glass-passivated silicon junction and achieves 600 W peak pulse power with ≤0.01% duty cycle, derated linearly above 25 °C ambient per Fig. 2. Thermal resistance is 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead), enabling reliable operation up to 150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working range for protected line. |
| VBR (min/max) | 47.8 V / 52.8 V at 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on across production lot. |
| VC @ IPPM | 69.4 V at 8.6 A - Clamping voltage under 10/1000 µs surge; limits stress on downstream ICs during ESD or load dump. |
| PPPM | 600 W - Peak pulse power handling capability; supports high-energy transients common in automotive and industrial environments. |
| ID @ VWM | 1.0 µA - Reverse leakage at rated stand-off; negligible power loss and signal distortion in standby. |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive modules and high-temperature industrial enclosures. |
| Qualification | AEC-Q101 qualified - Validated for automotive electronic systems requiring proven reliability under thermal cycling, humidity, and mechanical stress. |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. No polarity marking on bidirectional variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current sink (negative half-cycle) | Provides symmetrical conduction path during negative voltage excursions; connects to protected line or ground reference. |
| Cathode | Transient current sink (positive half-cycle) | Provides symmetrical conduction path during positive voltage excursions; connects to protected line or ground reference. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR and VC performance for ± polarity transients-enables single-device protection of AC signals or ungrounded buses. |
| 600 W peak pulse power | Handles high-energy surges (e.g., ISO 7637-2 Pulse 5a) without degradation when mounted on 5.0 mm × 5.0 mm copper pads. |
| AEC-Q101 qualification | Validated for automotive applications including engine control units, body electronics, and ADAS sensor interfaces. |
| Halogen-free & RoHS compliant (M3) | Meets environmental compliance requirements for global OEM supply chains and industrial sustainability mandates. |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles-no moisture sensitivity handling required prior to assembly. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump transients (ISO 16750-2) and alternator-induced spikes. IC Role / Device Role / Timing Role: Shunt TVS placed between power rail and chassis ground to clamp surges above 43 V before reaching LDOs or microcontrollers. Use Value: Limits peak voltage to 69.4 V during 8.6 A transients, preventing latch-up or gate oxide damage in downstream PMICs and MCUs. | Use Scenario: Safeguarding analog outputs (e.g., 4–20 mA loops) and digital I/O (CAN, LIN) in factory automation sensors exposed to relay switching noise. IC Role / Device Role / Timing Role: Bidirectional clamping element on differential or single-ended signal lines to absorb fast-rising EFT bursts (IEC 61000-4-4). Use Value: Sub-100 ns response time and <1.0 µA leakage preserve signal integrity while suppressing ±2 kV EFT events without loading the source. |
| Telecom Data Line Surge Suppression | Consumer USB Port ESD Protection |
Use Scenario: Shielding Ethernet PHY interfaces (10/100BASE-TX) from lightning-induced surges entering via outdoor cabling. IC Role / Device Role / Timing Role: Primary-level TVS on transformer-coupled pairs, coordinated with secondary-side protection to meet IEC 61000-4-5 Level 3 (1 kV/2 Ω). Use Value: 600 W rating and 69.4 V clamping ensure energy diversion before common-mode choke saturation or PHY IC failure. | Use Scenario: Hardening USB 2.0 D+/D− lines in portable devices against human-body-model (HBM) ESD events up to ±15 kV. IC Role / Device Role / Timing Role: Bidirectional shunt suppressor placed directly at connector, upstream of USB transceiver ESD diodes. Use Value: Low capacitance (typ. <100 pF at 0 V, inferred from family curve Fig. 4) avoids signal rise-time degradation while meeting IEC 61000-4-2 Level 4. |
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-M3/5B | Same VWM/VBR/VC, but lower PPPM = 600 W (same rating) and higher IPPM = 9.4 A; SMBJ package has larger footprint (DO-214AB vs. DO-215AA). | SMBJ43CA-M3/5B offers marginally higher surge current handling but requires PCB layout change due to larger package size and different pad geometry. | Select SMBJ43CA-M3/5B only if existing design uses SMBJ footprint or requires slightly higher IPPM margin with no space constraint. |
| SMCJ43CA-M3/5B | Same electrical specs but in larger SMC (DO-214AB) package; PPPM = 1500 W, IPPM = 21.5 A; higher thermal mass and lower RθJA. | SMCJ43CA-M3/5B targets higher-energy threats (e.g., ISO 7637-2 Pulse 1/2) where 1500 W rating and improved thermal dissipation are critical. | Choose SMCJ43CA-M3/5B for heavy-duty industrial or commercial power entry protection where board space allows larger package and higher surge margin is mandatory. |
Compared with SMBG43CA-M3/5B, SMBJ43CA-M3/5B provides identical clamping performance in a physically larger package suited for legacy layouts, while SMCJ43CA-M3/5B delivers triple the pulse power rating and superior thermal robustness-making SMBG43CA-M3/5B optimal for space-constrained, AEC-Q101-compliant automotive and sensor applications where 600 W suffices.
Availability
SMBG43CA-M3/5B is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, telecom data ports, and consumer USB interface designs requiring stable component supply with halogen-free, AEC-Q101-qualified TVS protection.
Supply support for SMBG43CA-M3/5B 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 was engineered for high-density, automotive-grade transient suppression-balancing low profile, AEC-Q101 compliance, and 600 W pulse capability in the compact DO-215AA package.
FAQ
What does the "CA" suffix indicate in SMBG43CA-M3/5B?
The "CA" suffix denotes a bidirectional configuration: SMBG43CA-M3/5B clamps voltage transients of either polarity symmetrically, unlike unidirectional variants (e.g., SMBG43A). This makes it ideal for protecting AC-coupled lines, differential buses like CAN or RS-485, and floating sensor outputs where polarity reversal may occur during surge events.
Is SMBG43CA-M3/5B compatible with lead-free reflow soldering processes?
Yes, SMBG43CA-M3/5B meets MSL Level 1 per J-STD-020 with a maximum peak reflow temperature of 260 °C, making it fully compatible with standard lead-free soldering profiles. Its matte tin-plated leads comply with J-STD-002 and JESD 22-B102, ensuring reliable wetting and joint integrity without pre-baking.
How does the clamping voltage of SMBG43CA-M3/5B compare to its breakdown voltage?
SMBG43CA-M3/5B has a VBR range of 47.8–52.8 V at 1 mA and a clamping voltage VC of 69.4 V at 8.6 A, yielding a clamping ratio (VC/VBR(min)) of ~1.45. This ratio reflects efficient voltage limiting-ensuring protected circuits experience minimal overvoltage during surge events while maintaining low leakage below 43 V.
Can SMBG43CA-M3/5B be used in place of a unidirectional TVS like SMBG43A?
No-SMBG43CA-M3/5B is electrically bidirectional and lacks polarity marking, whereas SMBG43A is unidirectional with a cathode band. Substituting SMBG43CA-M3/5B for SMBG43A in DC-biased circuits may cause unintended conduction during normal operation. Use only in applications requiring symmetrical protection or where circuit topology supports bidirectional clamping.
What is the significance of the "M3" suffix in SMBG43CA-M3/5B?
The "M3" suffix indicates halogen-free, RoHS-compliant construction with industrial-grade reliability and JESD 201 Class 2 whisker resistance. Unlike "E3" (standard RoHS), "M3" meets stricter environmental mandates for bromine/chlorine content, making SMBG43CA-M3/5B suitable for global automotive and industrial OEM programs with zero-halogen requirements.
SMBG43CA-M3/5B 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:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBG)
SMBG43CA-M3/5B FAQ
1.How can I place an order for SMBG43CA-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG43CA-M3/5B 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-M3/5B reliable?
The price and inventory of SMBG43CA-M3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG43CA-M3/5B is usually 5 days.
3.What payment methods are accepted for SMBG43CA-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG43CA-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG43CA-M3/5B?
SMBG43CA-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG43CA-M3/5B 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-M3/5B?
For technical support, including SMBG43CA-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG43CA-M3/5B requirements.
6.How does Aetrix verify that SMBG43CA-M3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG43CA-M3/5B 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-M3/5B meets industry standards.
7.What is the process for return or replacement of SMBG43CA-M3/5B?
All SMBG43CA-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG43CA-M3/5B, 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-M3/5B part is unused and in its original packaging.
Return procedure for SMBG43CA-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG43CA-M3/5B Tags
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