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Vishay General Semiconductor - Diodes Division SMBJ43CA-M3/52
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- Part No.:
- SMBJ43CA-M3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ43CA-M3/52.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,800
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Product details
Overview
SMBJ43CA-M3/52 from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMB (DO-214AA) package, designed for clamping voltage transients on signal or power lines. It features a 43 V stand-off voltage (VWM), 47.8–52.8 V breakdown range (VBR at 1 mA), 69.4 V maximum clamping voltage (VC) at 8.6 A peak pulse current, and 600 W peak pulse power capability with a 10/1000 µs waveform - used to protect MOSFETs, sensor interfaces, and industrial I/O circuits against ESD and inductive switching surges.
For engineers reviewing the SMBJ43CA-M3/52 datasheet, SMBJ43CA-M3/52 pinout, SMBJ43CA-M3/52 application, or SMBJ43CA-M3/52 equivalent, key selection criteria include bidirectional clamping symmetry, low clamping ratio (VC/VWM = 1.61), halogen-free RoHS compliance (M3 suffix), and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This device operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 µA leakage at 43 V), but conducts heavily when transient voltage exceeds VBR, limiting downstream voltage to ≤69.4 V. Its glass-passivated junction ensures stable breakdown and fast response (<1 ns), while the SMB package provides thermal resistance of 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead).
The SMBJ43CA-M3/52 is rated for repetitive surge duty cycle ≤0.01 %, supports operating junction temperatures from –55 °C to +150 °C, and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. It is unmarked (standard for bidirectional types) and has no polarity marking - both terminals are electrically symmetric.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - maximum continuous reverse working voltage before significant leakage; defines upper limit of safe operating DC or AC RMS voltage. |
| VBR (min/max) | 47.8 V / 52.8 V at 1 mA - guaranteed breakdown onset range; ensures predictable clamping initiation across temperature and unit variation. |
| VC @ IPPM | 69.4 V at 8.6 A - maximum clamped voltage during 10/1000 µs surge; determines worst-case stress on protected IC or transistor. |
| PPPM | 600 W - peak pulse power handling capacity; defines energy absorption capability for transient events like EFT or lightning-induced surges. |
| IPPM | 8.6 A - peak pulse current corresponding to VC; used to size PCB trace width and verify layout survivability under surge. |
| TJ max. | +150 °C - maximum junction temperature; sets thermal derating boundary for sustained power dissipation or high-frequency surge repetition. |
| Package | SMB (DO-214AA) - standardized surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height; compatible with JEDEC-standard pick-and-place feeders. |
Pinout & Package
Package: SMB (DO-214AA), bidirectional configuration - no cathode/anode marking; both terminals are functionally identical and interchangeable. Mounting uses 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal for rated power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode / Cathode (bidirectional) | Electrically symmetric node; connects to line under protection (e.g., RS-485 A/B, CAN H/L, or DC bus); no polarity sensitivity. |
| Terminal 2 | Anode / Cathode (bidirectional) | Paired terminal completing the shunt path to ground or rail; enables differential or common-mode transient suppression without orientation constraints. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential signal lines (e.g., USB D+/D−, RS-485) without polarity concerns. |
| 600 W peak pulse power (10/1000 µs) | Supports robust immunity to IEC 61000-4-5 Level 3 (1 kV surge) and ISO 7637-2 Pulse 1/2a/5a in automotive and industrial environments. |
| Halogen-free, RoHS-compliant (M3 suffix) | Fulfills environmental compliance requirements for consumer, telecom, and EU-based industrial equipment without compromising surge rating. |
| MSL Level 1, 260 °C peak reflow | Allows standard lead-free SMT assembly without moisture sensitivity baking or special handling protocols. |
| Low clamping ratio (VC/VWM = 1.61) | Minimizes overvoltage stress on downstream components compared to higher-ratio TVS devices, improving system-level reliability. |
Applications
| Industrial Sensor Interface Protection | Automotive Body Control Module (BCM) I/O |
|---|---|
|
Use Scenario: Protecting analog sensor outputs (e.g., pressure, temperature) from ESD and load-dump induced transients in factory automation PLCs. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed between signal line and ground, clamping surges before they reach ADC input or op-amp buffer. Use Value: Prevents sensor signal corruption and ADC saturation during 8 kV contact ESD events, maintaining measurement integrity without added filtering delay. |
Use Scenario: Safeguarding LIN bus pins and switch inputs in BCM modules exposed to battery transients and relay coil flyback. IC Role / Device Role / Timing Role: Bidirectional voltage clamp on LIN data line and wake-up input, absorbing ±100 V/50 ms pulses per ISO 7637-2 Pulse 5a. Use Value: Eliminates need for separate unidirectional devices on each line, reducing BOM count while meeting AEC-Q101 stress test requirements. |
| Telecom Ethernet PHY Port Protection | Consumer Appliance Motor Drive Feedback Lines |
|
Use Scenario: Shielding 10/100BASE-TX transformer-coupled PHY lanes from lightning-induced surges entering via RJ-45 jacks. IC Role / Device Role / Timing Role: Common-mode TVS pair (one per differential pair) referenced to chassis ground, suppressing mode conversion transients. Use Value: Maintains signal integrity up to 100 MHz by limiting capacitance to <100 pF at zero bias, avoiding Ethernet link dropouts. |
Use Scenario: Securing hall-effect sensor feedback paths in BLDC motor controllers inside washing machines and HVAC systems. IC Role / Device Role / Timing Role: Low-leakage (≤1 µA at 43 V) shunt protector on 5 V sensor supply and output lines, surviving repeated 40 V inductive spikes. Use Value: Extends sensor lifetime by preventing gate oxide damage in interface FETs during motor commutation noise events. |
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 electrical specs and SMB package; RoHS-compliant but contains brominated flame retardants (not halogen-free). | Acceptable for commercial-grade non-automotive designs where halogen-free certification is not mandated. | Select when cost sensitivity outweighs halogen-free requirement and AEC-Q101 qualification is unnecessary. |
| SMAJ43CA-M3 | Lower 400 W PPPM, larger SMA package (DO-214AC), higher RθJA (140 °C/W), same VWM/VC ratings. | Suitable for lower-energy surge environments or space-constrained layouts where SMB footprint is unavailable. | Choose only if board real estate permits larger SMA outline and 400 W rating suffices for IEC 61000-4-5 Level 2 compliance. |
Compared with SMBJ43CA-M3/52, the E3 variant trades halogen-free status for marginally lower cost in commercial applications, while the SMAJ43CA-M3 reduces surge capacity and thermal performance to fit legacy SMA footprints - neither offers pin-to-pin replacement without layout revision.
Availability
SMBJ43CA-M3/52 is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, telecom Ethernet PHY ports, and consumer appliance motor drive feedback lines requiring stable component supply, halogen-free compliance, and repeatable surge immunity performance.
Supply support for SMBJ43CA-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, power efficiency, and application-specific ruggedization.
The SMBJ series was engineered for high-energy transient suppression in space-constrained SMT designs across automotive, industrial, and communications infrastructure - prioritizing low clamping ratio, repeatable surge endurance, and process-controlled junction stability.
FAQ
What is the maximum clamping voltage of SMBJ43CA-M3/52 under a 10/1000 µs surge?
The SMBJ43CA-M3/52 has a maximum clamping voltage (VC) of 69.4 V when subjected to its rated peak pulse current of 8.6 A using the standardized 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees worst-case voltage stress on protected circuitry during surge events. The SMBJ43CA-M3/52 maintains this clamping performance across its full operating temperature range of –55 °C to +150 °C.
Is SMBJ43CA-M3/52 suitable for automotive applications requiring AEC-Q101 qualification?
No - SMBJ43CA-M3/52 is a commercial-grade, halogen-free, RoHS-compliant part but is not AEC-Q101 qualified. For automotive use, Vishay specifies the HM3 suffix variants (e.g., SMBJ43CAHM3_X) which undergo additional stress testing and lot traceability. The SMBJ43CA-M3/52 remains appropriate for industrial and telecom applications where AEC-Q101 is not mandated, and its M3 suffix ensures halogen-free compliance per IEC 61249-2-21.
How does the bidirectional nature of SMBJ43CA-M3/52 affect its PCB layout?
The SMBJ43CA-M3/52 has no polarity marking and identical electrical behavior in both directions, so PCB layout requires no orientation alignment - either terminal may connect to the protected line or reference ground/rail. This simplifies routing for differential signals (e.g., RS-485, CAN) and eliminates risk of incorrect placement during automated assembly. Layout must still follow Vishay's recommended 0.2" × 0.2" copper pad dimensions per terminal to sustain rated 600 W pulse power.
What is the reverse leakage current of SMBJ43CA-M3/52 at its rated stand-off voltage?
At the rated stand-off voltage (VWM) of 43 V and ambient temperature of 25 °C, the SMBJ43CA-M3/52 exhibits a maximum reverse leakage current (ID) of 1.0 µA. This low leakage ensures minimal power loss and signal loading on protected lines during normal operation, making it suitable for high-impedance sensor interfaces and battery-powered systems where quiescent current matters. The SMBJ43CA-M3/52 maintains this specification across its full –55 °C to +125 °C operating range.
Can SMBJ43CA-M3/52 replace SMBJ43A-M3/52 in an existing design?
No - SMBJ43CA-M3/52 is bidirectional, whereas SMBJ43A-M3/52 is unidirectional with a marked cathode band. Substituting them requires verifying circuit topology: unidirectional devices require correct polarity for forward conduction during positive surges, while bidirectional devices protect both polarities equally. Using SMBJ43CA-M3/52 in place of SMBJ43A-M3/52 may cause unintended conduction in DC-biased lines. Always confirm signal polarity and grounding scheme before interchange.
SMBJ43CA-M3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- 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 (SMBJ)
SMBJ43CA-M3/52 FAQ
1.How can I place an order for SMBJ43CA-M3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ43CA-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 SMBJ43CA-M3/52 reliable?
The price and inventory of SMBJ43CA-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 SMBJ43CA-M3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ43CA-M3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ43CA-M3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ43CA-M3/52?
SMBJ43CA-M3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ43CA-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 SMBJ43CA-M3/52?
For technical support, including SMBJ43CA-M3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ43CA-M3/52 requirements.
6.How does Aetrix verify that SMBJ43CA-M3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ43CA-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 SMBJ43CA-M3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ43CA-M3/52?
All SMBJ43CA-M3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ43CA-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 SMBJ43CA-M3/52 part is unused and in its original packaging.
Return procedure for SMBJ43CA-M3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ43CA-M3/52 Tags
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