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Vishay General Semiconductor - Diodes Division SMBJ43C-E3/5B
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- Part No.:
- SMBJ43C-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ43C-E3/5B.pdf
- Description:
- TVS DIODE 43VWM 76.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,421
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Product details
Overview
SMBJ43C-E3/5B 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 standoff 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 rating with 10/1000 µs waveform - deployed in industrial sensor interfaces and DC power rail protection.
For engineers reviewing the SMBJ43C-E3/5B datasheet, SMBJ43C-E3/5B pinout, SMBJ43C-E3/5B application, or SMBJ43C-E3/5B equivalent, this page delivers verified electrical parameters, thermal derating behavior, clamping performance under surge conditions, and RoHS-compliant commercial-grade sourcing details for ESD and lightning-induced transient suppression.
Technical Context
The SMBJ43C-E3/5B operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low incremental surge resistance, enabling consistent clamping across repetitive 10/1000 µs transients at 0.01% duty cycle.
Thermal design relies on RθJA = 100 °C/W (typ.) and RθJL = 20 °C/W (typ.), with derating above TA = 25 °C per Figure 2. It supports 100 A non-repetitive forward surge (IFSM, 8.3 ms half-sine) and maintains operation from –55 °C to +150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - Maximum continuous reverse operating voltage before conduction begins; defines safe operating margin below clamping onset. |
| VBR (min/max) | 47.8 V / 52.8 V at IT = 1 mA - Confirmed breakdown range ensuring predictable turn-on during overvoltage events. |
| VC @ IPPM | 69.4 V at 8.6 A - Clamped voltage during 10/1000 µs surge; determines maximum stress imposed on downstream circuitry. |
| PPPM | 600 W - Peak pulse power handling capability; validates robustness against IEC 61000-4-5 Level 4 surges. |
| IPPM | 8.6 A - Peak pulse current supported at rated clamping voltage; used to size PCB trace width and layout clearance. |
| TJ max. | +150 °C - Maximum junction temperature; sets thermal management requirements for high-ambient industrial deployments. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; guides heatsinking decisions. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile plastic case with matte tin-plated leads. Cathode indicated by band marking; anode is unmarked end. Meets UL 94 V-0 flammability rating and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Reverse-biased terminal | Connected to protected line; conducts during overvoltage to shunt surge current to ground. |
| Anode (unbanded end) | Reference/ground terminal | Typically tied to system ground or low-impedance return path; completes clamping loop during transient event. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Validates compliance with IEC 61000-4-5 surge immunity requirements for industrial equipment. |
| Low clamping ratio (VC/VWM ≈ 1.61) | Minimizes voltage overshoot during clamping, protecting 48 V-rated ICs and MOSFETs without overdesign. |
| Glass-passivated junction | Ensures long-term parameter stability and reduced leakage drift over temperature and lifetime. |
| MSL Level 1 (J-STD-020), 260 °C peak reflow | Enables compatibility with standard lead-free SMT assembly processes without moisture sensitivity concerns. |
| RoHS-compliant, commercial grade (E3 suffix) | Meets environmental compliance for global industrial and consumer electronics manufacturing. |
Applications
| Industrial Sensor Interface Protection | 48 V DC Power Rail Clamp |
|---|---|
|
Use Scenario: Protecting analog front-end inputs of pressure/temperature sensors connected to PLC I/O modules exposed to relay coil kickback and motor drive noise. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and ground to clamp induced spikes before they reach precision ADC or op-amp inputs. Use Value: Limits transient voltage to ≤69.4 V, preserving signal integrity and preventing latch-up in 3.3 V or 5 V sensor interface ICs powered from isolated 24–48 V supplies. |
Use Scenario: Safeguarding 48 V input rails of motor control gate drivers and CAN transceivers in factory automation systems. IC Role / Device Role / Timing Role: Primary overvoltage clamp mounted directly at power entry point, absorbing load dump and inductive switching energy. Use Value: Withstands 600 W surges while maintaining VC < 70 V, ensuring downstream DC-DC converters and logic remain within absolute maximum ratings. |
| Automotive Body Control Module (BCM) Subsystem | Telecom Power Supply Input Stage |
|
Use Scenario: Secondary transient suppression on 12 V auxiliary circuits (e.g., mirror heaters, seat controls) in non-AEC-Q101 qualified BCM subassemblies. IC Role / Device Role / Timing Role: Standoff-rated TVS providing cost-effective surge margin where full automotive qualification is not required. Use Value: Leverages 43 V VWM to tolerate normal 14 V nominal bus swings while clamping 100 V+ load dump events per ISO 7637-2 Pulse 5a simulation. |
Use Scenario: Front-end protection on AC/DC adapter outputs feeding PoE-powered network switches and base station radios. IC Role / Device Role / Timing Role: Fast-response unidirectional suppressor placed after bulk capacitance to absorb residual line transients escaping primary MOV stage. Use Value: Achieves <1 ns response time and low VC, reducing stress on secondary-side controllers and improving system-level surge test pass rate. |
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-E3/5B | Identical electrical specs and package; differs only in part marking (A vs C suffix denotes same unidirectional configuration). | No functional difference; both rated for 43 V VWM, same VBR, VC, and PPPM. | Select SMBJ43C-E3/5B when matching legacy BOMs specifying "C" suffix; otherwise interchangeable with SMBJ43A-E3/5B. |
| SMCJ43A-E3/57T | Same VWM and VBR, but larger SMC (DO-214AB) package with higher PPPM = 1500 W and lower RθJA = 35 °C/W. | Better suited for high-energy surge environments (e.g., outdoor telecom cabinets); requires larger PCB footprint. | Choose SMCJ43A-E3/57T only if 600 W is insufficient and layout allows SMC footprint; SMBJ43C-E3/5B remains optimal for space-constrained 48 V rail designs. |
Compared with SMBJ43A-E3/5B, SMBJ43C-E3/5B offers identical protection performance in the same SMB footprint; versus SMCJ43A-E3/57T, it trades peak power headroom for 40% smaller board area and faster assembly throughput - critical for high-density industrial PCBs.
Availability
SMBJ43C-E3/5B is available at Aetrix Electronics and suitable for industrial sensor interfaces, 48 V DC power rail clamping, and telecom power supply input stages requiring stable component supply, RoHS compliance, and repeatable surge performance.
Supply support for SMBJ43C-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, and protection devices with emphasis on reliability, thermal performance, and application-specific validation.
The SMBJ series targets cost-sensitive, high-volume industrial and consumer transient suppression needs - optimized for automated SMT placement, low-profile layouts, and robust 600 W surge handling in SMB footprint.
FAQ
What is the standoff voltage rating of SMBJ43C-E3/5B?
The SMBJ43C-E3/5B has a maximum reverse standoff voltage (VWM) of 43 V, meaning it remains non-conductive up to this DC or RMS voltage level under normal operation. This value is confirmed in the Vishay datasheet Document Number 88392, Table "ELECTRICAL CHARACTERISTICS", row for SMBJ43A/SMBJ43C. The SMBJ43C-E3/5B maintains this rating across its full operating temperature range.
Does SMBJ43C-E3/5B meet RoHS requirements?
Yes, SMBJ43C-E3/5B is RoHS-compliant per the "E3" suffix designation in its ordering code, indicating commercial-grade, lead-free, and halogen-free construction. This is explicitly stated in the "MECHANICAL DATA" section of the Vishay datasheet (Rev. 09-Jan-2024), which confirms E3 suffix parts meet RoHS Directive 2011/65/EU and associated material restrictions.
What is the clamping voltage of SMBJ43C-E3/5B at its rated peak pulse current?
The SMBJ43C-E3/5B clamps to a maximum of 69.4 V when subjected to its rated peak pulse current of 8.6 A using the standardized 10/1000 µs waveform. This VC value is measured per ANSI/IEEE C62.35 and appears in the "ELECTRICAL CHARACTERISTICS" table under the SMBJ43A/SMBJ43C entry. It defines the upper voltage limit imposed on protected circuitry during surge events.
Is SMBJ43C-E3/5B suitable for automotive applications?
SMBJ43C-E3/5B is a commercial-grade device and is not AEC-Q101 qualified. For automotive use, Vishay offers the AEC-Q101 variant SMBJ43CHE3_B/I (with HE3 suffix). While SMBJ43C-E3/5B may function in benign automotive subsystems, it lacks the stress testing, lot traceability, and failure rate validation required for safety-critical or engine bay locations. Always verify qualification status via the full part number before automotive deployment.
What package type does SMBJ43C-E3/5B use, and what are its key mechanical dimensions?
SMBJ43C-E3/5B uses the SMB (DO-214AA) surface-mount package, measuring 4.57 mm × 3.94 mm × 2.20 mm (L × W × H) with 1.52 mm minimum lead width. The cathode is marked by a visible band, and terminals are matte tin-plated for J-STD-002 solderability. These dimensions and plating specs are defined in the "PACKAGE OUTLINE DIMENSIONS" section of the Vishay datasheet 88392.
SMBJ43C-E3/5B 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:
- -
- Bidirectional Channels:
- 1
- 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)
SMBJ43C-E3/5B FAQ
1.How can I place an order for SMBJ43C-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ43C-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 SMBJ43C-E3/5B reliable?
The price and inventory of SMBJ43C-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 SMBJ43C-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ43C-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ43C-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ43C-E3/5B?
SMBJ43C-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ43C-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 SMBJ43C-E3/5B?
For technical support, including SMBJ43C-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ43C-E3/5B requirements.
6.How does Aetrix verify that SMBJ43C-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ43C-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 SMBJ43C-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ43C-E3/5B?
All SMBJ43C-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ43C-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 SMBJ43C-E3/5B part is unused and in its original packaging.
Return procedure for SMBJ43C-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ43C-E3/5B Tags
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