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Vishay General Semiconductor - Diodes Division SMBJ43D-M3/I
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- Part No.:
- SMBJ43D-M3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ43D-M3/I.pdf
- Description:
- TVS DIODE 43VWM 68.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,193
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Product details
Overview
SMBJ43D-M3/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in the SMB (DO-214AA) package, designed for robust overvoltage protection of sensitive electronics. It features a 43 V stand-off voltage (VWM), 48.5–52.1 V breakdown voltage (VBR) at 1 mA, 68.5 V maximum clamping voltage (VC) at 8.76 A peak pulse current, and 600 W peak pulse power rating with 10/1000 μs waveform - ideal for protecting MOSFETs and signal lines in industrial power supplies.
For engineers reviewing the SMBJ43D-M3/I datasheet, SMBJ43D-M3/I pinout, SMBJ43D-M3/I application, or SMBJ43D-M3/I equivalent, key selection criteria include its unidirectional polarity, ±3.5% tight VBR tolerance, 0.5 μA max reverse leakage at VWM, M3 halogen-free RoHS-compliant construction, and compatibility with automated SMT placement on standard PCB pad layouts.
Technical Context
This TVS diode operates as a clamping device that remains non-conductive below 43 V and rapidly transitions to low-impedance conduction above its 48.5–52.1 V breakdown threshold. Its response time is sub-nanosecond, enabling effective suppression of fast transients induced by inductive switching or ESD events.
The SMBJ43D-M3/I delivers 600 W peak pulse power handling per 10/1000 μs waveform at TA = 25 °C, with thermal resistance RθJA of 125 °C/W on minimum recommended pad layout and junction temperature range from –55 °C to +150 °C - supporting reliable operation in harsh industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - maximum continuous reverse operating voltage before significant leakage begins |
| VBR min/max | 48.5 V / 52.1 V at 1 mA - precise breakdown window ensures predictable turn-on behavior |
| VC @ IPPM | 68.5 V at 8.76 A - clamping voltage limits downstream component stress during surge events |
| PPPM | 600 W - peak transient energy absorption capability under standardized 10/1000 μs waveform |
| ID @ VWM | ≤0.5 μA - ultra-low leakage preserves signal integrity and minimizes standby power loss |
| Package | SMB (DO-214AA) - industry-standard surface-mount outline with 2.20 mm height and 5.59 mm length |
| Polarity | Unidirectional - cathode marked by band; blocks reverse current until breakdown threshold is exceeded |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, M3 grade (JESD 201 Class 2 whisker resistant), matte tin-plated terminals solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side of protected circuit; enables normal forward bias operation if required |
| Cathode (banded end) | Reverse-biased clamping terminal | Connected to higher-potential rail; conducts during overvoltage to shunt surge current to ground |
Key Features
| Feature | Design Value |
|---|---|
| ±3.5 % VBR tolerance | Enables tighter system-level voltage margining and reduces need for derating in high-reliability designs |
| 600 W peak pulse power | Handles repetitive 10/1000 μs surges up to 0.01 % duty cycle without degradation |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients, improving protection effectiveness |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns |
| UL 94 V-0 molding compound | Meets flammability safety requirements for enclosed industrial and telecom equipment |
Applications
| Industrial Motor Drives | Telecom Power Interfaces |
|---|---|
Use Scenario: Protection of gate drivers and IGBTs against inductive kickback during PWM switching in variable-frequency drives. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed across DC bus or gate-source terminals to limit voltage spikes. Use Value: Clamps transients to ≤68.5 V, preventing gate oxide damage and ensuring long-term reliability of power semiconductors. | Use Scenario: Surge suppression on -48 V DC input rails of base station power modules exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on telecom rectifier output, coordinated with upstream MOVs and downstream DC-DC converters. Use Value: Withstands 600 W pulses and maintains <0.5 μA leakage at nominal -48 V, preserving efficiency and meeting GR-1089-CORE immunity requirements. |
| Automotive Body Control Modules | Industrial Sensor Signal Lines |
Use Scenario: Protection of LIN bus transceivers and microcontroller I/O pins against load dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS connected between LIN line and ground, leveraging 43 V VWM to tolerate battery fluctuations while clamping surges. Use Value: Tight 48.5–52.1 V VBR window ensures activation only during fault conditions, avoiding false triggering during 14 V nominal operation. | Use Scenario: ESD and fast transient protection for analog outputs (e.g., 4–20 mA loops) in factory automation sensors. IC Role / Device Role / Timing Role: Low-leakage TVS placed at connector interface to divert IEC 61000-4-2 contact discharge energy away from precision DACs and op-amps. Use Value: Sub-nanosecond response and 68.5 V clamping prevent latch-up or parametric shift in signal conditioning circuitry during 8 kV ESD 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 |
|---|---|---|---|
| SMBJ43A-M3/I | Bidirectional variant with same VWM (43 V) and VC (68.5 V), but symmetric clamping in both polarities | Required where AC-coupled or dual-polarity signal lines need protection (e.g., RS-485, CAN bus) | Select SMBJ43A-M3/I only when bidirectional clamping is explicitly needed; SMBJ43D-M3/I is optimal for DC rail or unidirectional signal protection |
| SMCJ43A-M3/I | Same VWM and VC but in larger SMC (DO-214AB) package with 1500 W PPPM rating and lower RθJA (60 °C/W) | Suitable for higher-energy surge environments where board space allows and thermal management is critical | Choose SMCJ43A-M3/I when system-level surge testing exceeds IEC 61000-4-5 Level 4; SMBJ43D-M3/I fits space-constrained SMB footprints |
Compared with SMBJ43A-M3/I and SMCJ43A-M3/I, the SMBJ43D-M3/I offers optimized cost, size, and leakage performance for unidirectional DC protection - delivering precise 43 V standoff, 68.5 V clamping, and 0.5 μA leakage in the smallest qualified surface-mount TVS package for industrial-grade reliability.
Availability
SMBJ43D-M3/I is available at Aetrix Electronics and suitable for industrial motor drives, telecom power interfaces, and automotive body control modules requiring stable component supply, consistent M3-grade material compliance, and full traceability through Vishay's authorized channel.
Supply support for SMBJ43D-M3/I 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, precision, and application-specific optimization.
The SMBJ series is engineered for high-energy transient suppression in space-constrained surface-mount applications, targeting industrial, telecom, and automotive systems where consistent clamping performance and long-term stability under thermal cycling are critical.
FAQ
What is the breakdown voltage range of the SMBJ43D-M3/I?
The SMBJ43D-M3/I has a specified breakdown voltage (VBR) range of 48.5 V to 52.1 V at a test current of 1.0 mA, measured per ANSI/IEEE C62.35 standards. This ±3.5 % tolerance ensures predictable turn-on behavior during overvoltage events and supports accurate system-level margining in designs using SMBJ43D-M3/I for DC rail protection.
Is the SMBJ43D-M3/I unidirectional or bidirectional?
The SMBJ43D-M3/I is a unidirectional transient voltage suppressor, indicated by the "D" suffix and presence of a cathode band on the SMB package. It conducts only when the cathode is at a higher potential than the anode, making it suitable for protecting DC power rails and unidirectional signal paths - unlike bidirectional variants (e.g., SMBJ43CD-M3/I) used for AC or differential lines.
What is the maximum clamping voltage of the SMBJ43D-M3/I at rated surge current?
The SMBJ43D-M3/I exhibits a maximum clamping voltage (VC) of 68.5 V at its rated peak pulse current (IPPM) of 8.76 A, tested with a 10/1000 μs waveform. This value defines the upper voltage limit imposed on protected circuitry during surge events and is critical for ensuring downstream components like MOSFETs or microcontrollers remain within safe operating voltage ranges when SMBJ43D-M3/I is active.
Does the SMBJ43D-M3/I meet RoHS and halogen-free requirements?
Yes, the SMBJ43D-M3/I carries the "M3" suffix, confirming it is halogen-free, RoHS-compliant, and qualified to JESD 201 Class 2 for tin whisker resistance. Its molding compound meets UL 94 V-0 flammability rating, and matte tin-plated terminals comply with J-STD-002 and JESD 22-B102 solderability standards - fulfilling environmental and reliability requirements for industrial and telecom applications using SMBJ43D-M3/I.
What is the thermal resistance of the SMBJ43D-M3/I on standard PCB layout?
The SMBJ43D-M3/I has a typical junction-to-ambient thermal resistance (RθJA) of 125 °C/W when mounted on the minimum recommended pad layout per Vishay's datasheet. This value assumes a standard SMB footprint with defined copper area; for improved thermal performance, designers may use larger copper pours or thermal vias - especially important when operating near its 1.0 W steady-state power dissipation limit at TA = 25 °C.
SMBJ43D-M3/I 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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 43V
- Voltage - Breakdown (Min):
- 48.5V
- Voltage - Clamping (Max) @ Ipp:
- 68.5V
- Current - Peak Pulse (10/1000µs):
- 8.76A
- 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)
SMBJ43D-M3/I FAQ
1.How can I place an order for SMBJ43D-M3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ43D-M3/I 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 SMBJ43D-M3/I reliable?
The price and inventory of SMBJ43D-M3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ43D-M3/I is usually 5 days.
3.What payment methods are accepted for SMBJ43D-M3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ43D-M3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ43D-M3/I?
SMBJ43D-M3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ43D-M3/I 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 SMBJ43D-M3/I?
For technical support, including SMBJ43D-M3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ43D-M3/I requirements.
6.How does Aetrix verify that SMBJ43D-M3/I is sourced from the original manufacturer or authorized distributors?
All SMBJ43D-M3/I 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 SMBJ43D-M3/I meets industry standards.
7.What is the process for return or replacement of SMBJ43D-M3/I?
All SMBJ43D-M3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ43D-M3/I, 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 SMBJ43D-M3/I part is unused and in its original packaging.
Return procedure for SMBJ43D-M3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ43D-M3/I Tags
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