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Vishay General Semiconductor - Diodes Division SMBJ43-E3/52
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- Part No.:
- SMBJ43-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ43-E3/52.pdf
- Description:
- TVS DIODE 43VWM 76.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,830
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Product details
Overview
SMBJ43-E3/52 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features a 43 V stand-off voltage (VWM), 47.8–52.8 V breakdown voltage (VBR) at 1 mA, 69.4 V maximum clamping voltage (VC) at 8.6 A peak pulse current (IPPM), and 600 W peak pulse power (10/1000 µs waveform), deployed in industrial sensor protection and DC power rail surge suppression.
For engineers reviewing the SMBJ43-E3/52 datasheet, SMBJ43-E3/52 pinout, SMBJ43-E3/52 application, or SMBJ43-E3/52 equivalent, key selection criteria include clamping voltage margin relative to protected IC's absolute maximum rating, thermal resistance (RθJA = 100 °C/W), unidirectional polarity marking (cathode band), and RoHS-compliant matte tin-plated leads suitable for J-STD-002 soldering.
Technical Context
This TVS diode operates as a shunt-clamping device: under normal conditions it presents high impedance (>1 µA leakage at 43 V), then rapidly switches to low-impedance conduction when transient voltage exceeds VBR, diverting surge current away from downstream circuitry. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns).
The SMBJ43-E3/52 is rated for 150 °C maximum junction temperature, derates linearly above 25 °C ambient per Figure 2, and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. It is not AEC-Q101 qualified - the HE3/HM3 suffix variants are required for automotive use.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 43 V - maximum continuous reverse working voltage before significant leakage; sets upper limit for normal operating rail voltage. |
| VBR (Breakdown Voltage) | 47.8–52.8 V at 1 mA - guaranteed conduction onset range; defines minimum overvoltage threshold for clamping activation. |
| VC (Clamping Voltage) | 69.4 V at IPPM = 8.6 A - maximum voltage seen by protected circuit during 10/1000 µs surge; must stay below IC's absolute max rating. |
| PPPM (Peak Pulse Power) | 600 W - surge energy handling capability under standardized 10/1000 µs waveform; determines survivability against common lightning/inductive spikes. |
| ID (Reverse Leakage) | 1.0 µA max at 43 V - negligible standby current; avoids loading sensitive reference or bias networks. |
| RθJA | 100 °C/W - thermal resistance junction-to-ambient on 0.2" × 0.2" copper pads; informs derating needed for sustained power dissipation. |
| Polarity | Unidirectional - cathode marked by band; blocks forward current until Vf ≈ 3.5 V (at 50 A), enabling DC rail protection only. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads compliant with J-STD-002 and JESD 22-B102. Cathode identified by molded band on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Transient current sink input | Connected to protected line (e.g., +12 V rail); conducts surge current toward ground when clamped. |
| Cathode (banded end) | Reference node / ground return | Connected to system ground or low-impedance return path; establishes polarity and defines clamping reference point. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Handles IEC 61000-4-5 Level 3 surges (1 kV/2 Ω) on 12 V systems without failure when properly mounted. |
| Glass passivated junction | Ensures consistent VBR tolerance and long-term stability under thermal cycling and humidity exposure. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking; compatible with high-volume SMT assembly. |
| RoHS-compliant, halogen-free option available | E3 suffix denotes commercial-grade RoHS compliance; M3 suffix adds halogen-free molding compound for green manufacturing. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ESD > 15 kV), improving protection margin. |
Applications
| Industrial Sensor Interface Protection | DC Power Rail Surge Suppression |
|---|---|
|
Use Scenario: Protecting analog output lines (4–20 mA) and digital I/O of PLC modules from inductive switching transients in factory automation cabinets. IC Role / Device Role / Timing Role: Shunt-clamping TVS placed between signal line and chassis ground, activated within <1 ns upon overvoltage detection. Use Value: Limits induced spike voltage to ≤69.4 V, preventing damage to precision op-amps and ADC front-ends rated for 72 V absolute max. |
Use Scenario: Safeguarding 48 V DC input rails of telecom power supplies against lightning-induced surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: Primary overvoltage clamp on bulk input stage, coordinated with upstream fuse and MOV for staged energy absorption. Use Value: Clamps 600 W transients while maintaining 43 V nominal operation, enabling compact layout without derating margin loss. |
| Automotive Body Control Module (BCM) Input Protection | Consumer Appliance Motor Driver Protection |
|
Use Scenario: Guarding LIN bus inputs and switch sense lines in non-safety-critical BCMs exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS referenced to battery ground, placed adjacent to connector entry point. Use Value: Withstands 100 A IFSM (8.3 ms half-sine), surviving repeated load dump events without degradation when paired with appropriate series impedance. |
Use Scenario: Shielding microcontroller GPIOs and gate drivers in washing machine motor control boards from brush-commutator noise and relay kickback. IC Role / Device Role / Timing Role: Localized clamping element across H-bridge supply pins and logic-level signal paths. Use Value: 1.0 µA leakage at 43 V prevents false triggering in low-power sleep modes; SMB footprint enables dense PCB routing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43A-E3/52 | Same electrical specs and package; identical marking code "CT" and VBR range (47.8–52.8 V); E3/52 denotes same tape-and-reel packaging. | No functional difference; SMBJ43A-E3/52 is the standardized base part number; SMBJ43-E3/52 is legacy ordering variant with identical performance. | Select SMBJ43A-E3/52 for new designs to align with Vishay's current nomenclature and long-term availability planning. |
| SMAJ43A-E3/52 | Lower PPPM (400 W vs. 600 W), higher RθJA (150 °C/W), same VWM/VBR/VC; SMA (DO-214AC) package has smaller footprint and lower surge capacity. | Suitable only for lower-energy transients (e.g., ESD-only environments); insufficient for IEC 61000-4-5 Level 3 or inductive load switching. | Choose SMAJ43A-E3/52 only if board space is constrained and surge threat level is limited to ±8 kV contact ESD per IEC 61000-4-2. |
Compared with SMBJ43A-E3/52, the SMBJ43-E3/52 offers identical protection performance but may face longer lead times due to obsolescence risk; versus SMAJ43A-E3/52, it delivers 50 % higher surge power handling and 33 % better thermal dissipation - critical for industrial power rail applications.
Availability
SMBJ43-E3/52 is available at Aetrix Electronics and suitable for industrial sensor interfaces, DC power rail surge suppression, and consumer appliance motor driver protection requiring stable component supply across multi-year production cycles.
Supply support for SMBJ43-E3/52 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific optimization.
The SMBJ series is engineered for robust transient suppression in harsh environments - targeting industrial automation, telecom infrastructure, and automotive subsystems where repeatable clamping and long-term stability are mandatory.
FAQ
What is the clamping voltage of SMBJ43-E3/52 at its rated peak pulse current?
The SMBJ43-E3/52 has a maximum clamping voltage (VC) of 69.4 V at its specified peak pulse current (IPPM) of 8.6 A under the 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and represents the highest voltage the protected circuit will experience during a standardized surge event. Designers must ensure this clamping level remains below the absolute maximum voltage rating of downstream components.
Is SMBJ43-E3/52 suitable for automotive applications?
SMBJ43-E3/52 is not AEC-Q101 qualified; it carries the commercial-grade E3 suffix. For automotive use, Vishay specifies the SMBJ43HE3 variant (with HE3 or HM3 suffix), which undergoes stress testing per AEC-Q101. Using SMBJ43-E3/52 in automotive environments may compromise reliability under extended temperature cycling and vibration - always verify qualification status via the full part number before deployment.
How does the SMBJ43-E3/52 differ from the SMBJ43A-E3/52?
SMBJ43-E3/52 and SMBJ43A-E3/52 are electrically and mechanically identical - same VWM (43 V), VBR (47.8–52.8 V), VC (69.4 V), package (SMB/DO-214AA), and packaging (E3/52 tape-and-reel). The "A" suffix in SMBJ43A-E3/52 reflects Vishay's updated naming convention introduced to unify the SMBJ family; SMBJ43-E3/52 is a legacy designation still supported but not recommended for new designs.
What is the thermal resistance and how does it affect SMBJ43-E3/52 layout?
The SMBJ43-E3/52 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 means each watt of sustained power dissipation raises the junction temperature by 100 °C above ambient. For reliable operation, PCB layout must provide adequate copper area and avoid thermal isolation - undersized pads or narrow traces will increase RθJA and risk exceeding the 150 °C TJ max rating during repetitive surges.
Can SMBJ43-E3/52 be used in bidirectional signal line protection?
No - SMBJ43-E3/52 is unidirectional, indicated by its cathode band marking and specification set (e.g., no VBR symmetry, no bidirectional ID limits). For bidirectional protection (e.g., RS-485, USB, or AC-coupled signals), use the CA-suffixed variant SMBJ43CA-E3/52, which provides symmetrical clamping in both polarities and is tested per bidirectional electrical characteristics in the datasheet.
SMBJ43-E3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 43V
- Voltage - Breakdown (Min):
- 47.8V
- Voltage - Clamping (Max) @ Ipp:
- 76.7V
- Current - Peak Pulse (10/1000µs):
- 7.8A
- 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)
SMBJ43-E3/52 FAQ
1.How can I place an order for SMBJ43-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ43-E3/52 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 SMBJ43-E3/52 reliable?
The price and inventory of SMBJ43-E3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ43-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ43-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ43-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ43-E3/52?
SMBJ43-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ43-E3/52 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 SMBJ43-E3/52?
For technical support, including SMBJ43-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ43-E3/52 requirements.
6.How does Aetrix verify that SMBJ43-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ43-E3/52 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 SMBJ43-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ43-E3/52?
All SMBJ43-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ43-E3/52, 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 SMBJ43-E3/52 part is unused and in its original packaging.
Return procedure for SMBJ43-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ43-E3/52 Tags
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