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Vishay General Semiconductor - Diodes Division SMBJ43CD-M3/I
- Part No.:
- SMBJ43CD-M3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ43CD-M3/I.pdf
- Description:
- TVS DIODE 43VWM 68.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,032
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Product details
Overview
SMBJ43CD-M3/I 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 and power lines. It features a 43 V stand-off voltage (VWM), 48.5–52.1 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 μs), and clamps to ≤68.5 V at 8.76 A surge current - deployed in industrial sensor interfaces and telecom line protection.
For engineers reviewing the SMBJ43CD-M3/I datasheet, SMBJ43CD-M3/I pinout, SMBJ43CD-M3/I application, or SMBJ43CD-M3/I equivalent, key selection criteria include bidirectional clamping capability, ±3.5 % VBR tolerance, low leakage (<0.5 μA at VWM), M3-grade halogen-free RoHS compliance, and compatibility with automated SMT placement on standard PCB pad layouts.
Technical Context
This device operates as a voltage-clamping protector with symmetrical avalanche behavior in both polarities, enabling suppression of positive and negative transients without polarity sensitivity. Its low incremental surge resistance and fast response time ensure effective protection against ESD, lightning-induced surges, and inductive switching spikes.
The SMBJ43CD-M3/I is rated for TJ = –55 °C to +150 °C, with thermal resistance RθJA = 125 °C/W (on minimum pad) and RθJM = 20 °C/W, supporting reliable operation under repetitive surge conditions up to 0.01 % duty cycle when mounted per recommended layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 48.5 V / 52.1 V at 1 mA - tight ±3.5 % tolerance ensures predictable turn-on across production lots |
| VC @ IPPM | ≤68.5 V at 8.76 A - clamping voltage defines worst-case stress on downstream ICs during surge |
| PPPM | 600 W (10/1000 μs waveform) - peak transient energy handling capacity for surge immunity compliance |
| 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 5.59 mm × 3.94 mm footprint and MSL Level 1 rating |
| TJ max | +150 °C - enables use in high-temperature industrial and automotive under-hood environments |
Pinout & Package
Two-terminal device in SMB (DO-214AA) package; no cathode band marking for bidirectional configuration. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102, with M3 whisker resistance per JESD 201 Class 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional surge path | Either terminal accepts positive or negative transient; no polarity dependency in circuit layout |
| Case (cathode band absent) | Non-polarized mounting reference | Eliminates orientation check during automated placement; reduces assembly error risk |
Key Features
| Feature | Design Value |
|---|---|
| ±3.5 % VBR tolerance | Enables precise clamping threshold control without post-production binning or margin padding |
| 600 W peak pulse power | Meets IEC 61000-4-5 Level 4 (4 kV surge) requirements for industrial port protection |
| Low ID ≤ 0.5 μA at VWM | Minimizes loading on high-impedance sensor outputs and analog front-ends |
| MSL Level 1, 260 °C reflow | Supports single-pass lead-free reflow without moisture-related delamination or popcorning |
| M3 halogen-free & RoHS | Fulfills IPC-1752A material declaration requirements for industrial and telecom OEMs |
Applications
| Industrial Sensor Interface | Telecom Line Protection |
|---|---|
Use Scenario: Protecting 4–20 mA current loop transmitters and RS-485 nodes from field-induced surges in factory automation cabinets. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across differential bus lines or between signal and ground. Use Value: Limits transient voltage to ≤68.5 V, preventing damage to isolated RS-485 transceivers rated for ±60 V common-mode range. | Use Scenario: Shielding Ethernet PHY interface pins and PoE injectors from lightning-induced longitudinal surges on outdoor cable runs. IC Role / Device Role / Timing Role: Primary surge shunt on data pair inputs, coordinated with gas discharge tube (GDT) front-end staging. Use Value: Fast response (<1 ns) and low clamping voltage preserve signal eye diagram integrity while meeting GR-1089-CORE Level 3 surge immunity. |
| Automotive Body Control Module | Consumer Appliance Motor Drive |
Use Scenario: Safeguarding LIN bus transceivers and microcontroller GPIOs connected to external switches or sensors in passenger compartment modules. IC Role / Device Role / Timing Role: Localized TVS on each LIN node input, placed adjacent to connector entry point. Use Value: Withstands ISO 7637-2 Pulse 1 (inductive load dump) and Pulse 2a (supply line interruption) waveforms without degradation over 10⁵ cycles. | Use Scenario: Suppressing commutation spikes from brushed DC motors in washing machine control boards and HVAC blower assemblies. IC Role / Device Role / Timing Role: Across-motor terminals and between motor phase and chassis ground. Use Value: 600 W rating handles repetitive 100 ms inductive spikes at 12 V systems without thermal runaway or parameter shift. |
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 VWM/VBR/PPPM specs; differs in packaging (tape-and-reel vs. bulk) and M3 vs. standard plating | No functional difference in circuit performance; E3/52 variant lacks JESD 201 Class 2 whisker resistance | Select SMBJ43CD-M3/I for high-reliability industrial programs requiring whisker-resistant terminations |
| P6SMB43CA | Identical electrical specs and SMB package; different manufacturer (Littelfuse); same ±3.5 % VBR tolerance and 600 W rating | Validated in same IEC 61000-4-5 test setups; minor variation in clamping curve slope below 1 A | Use P6SMB43CA where dual-sourcing or alternate logistics channels are required |
Compared with SMBJ43CD-M3/I, SMBJ43CA-E3/52 offers identical clamping but reduced long-term plating reliability, while P6SMB43CA provides functionally equivalent surge suppression with cross-manufacturer validation - both require no schematic or layout change but differ in qualification scope and supply chain resilience.
Availability
SMBJ43CD-M3/I is available at Aetrix Electronics and suitable for industrial sensor interfaces, telecom line protection, automotive body control modules, and consumer appliance motor drives requiring stable component supply and full M3-grade compliance.
Supply support for SMBJ43CD-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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and high-volume manufacturability.
The SMBJ series was developed specifically for robust, surface-mount transient suppression in harsh environments - targeting industrial automation, telecom infrastructure, and automotive subsystems where consistent clamping and long-term stability are critical.
FAQ
What is the clamping voltage of SMBJ43CD-M3/I at its rated peak pulse current?
The SMBJ43CD-M3/I clamps to a maximum of 68.5 V at its rated peak pulse current of 8.76 A (10/1000 μs waveform). This value is measured under standardized test conditions and defines the upper voltage limit imposed on protected circuitry during surge events, ensuring compatibility with 75 V-rated interface ICs and microcontrollers.
Is SMBJ43CD-M3/I suitable for bidirectional signal line protection?
Yes, SMBJ43CD-M3/I is explicitly designed for bidirectional protection, as indicated by the "CD" suffix. Its symmetrical breakdown characteristic allows it to suppress both positive and negative transients equally - making it ideal for RS-485, CAN, LIN, and other differential or AC-coupled signal paths without polarity constraints.
Does SMBJ43CD-M3/I meet RoHS and halogen-free requirements?
Yes, SMBJ43CD-M3/I carries the "M3" suffix, confirming it is halogen-free, RoHS-compliant, and qualified to JESD 201 Class 2 for tin whisker resistance. It satisfies IPC-1752A material declarations and is approved for use in environmentally regulated industrial and telecom equipment.
What is the thermal resistance of SMBJ43CD-M3/I when mounted on standard PCB pads?
When mounted on the minimum recommended copper pad layout (per Vishay spec), SMBJ43CD-M3/I has a typical junction-to-ambient thermal resistance (RθJA) of 125 °C/W. This value increases if pad area is reduced and decreases with larger copper areas or thermal vias - critical for estimating temperature rise during repetitive surge events.
Can SMBJ43CD-M3/I replace unidirectional SMBJ43D-M3/I in existing designs?
No - SMBJ43CD-M3/I is bidirectional and lacks a cathode band, whereas SMBJ43D-M3/I is unidirectional with defined polarity. Substitution requires verifying that the circuit does not rely on DC blocking or rectification behavior; otherwise, reverse leakage or unintended conduction may occur in DC-biased lines.
SMBJ43CD-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:
- -
- Bidirectional Channels:
- 1
- 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)
SMBJ43CD-M3/I FAQ
1.How can I place an order for SMBJ43CD-M3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ43CD-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 SMBJ43CD-M3/I reliable?
The price and inventory of SMBJ43CD-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 SMBJ43CD-M3/I is usually 5 days.
3.What payment methods are accepted for SMBJ43CD-M3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ43CD-M3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ43CD-M3/I?
SMBJ43CD-M3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ43CD-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 SMBJ43CD-M3/I?
For technical support, including SMBJ43CD-M3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ43CD-M3/I requirements.
6.How does Aetrix verify that SMBJ43CD-M3/I is sourced from the original manufacturer or authorized distributors?
All SMBJ43CD-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 SMBJ43CD-M3/I meets industry standards.
7.What is the process for return or replacement of SMBJ43CD-M3/I?
All SMBJ43CD-M3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ43CD-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 SMBJ43CD-M3/I part is unused and in its original packaging.
Return procedure for SMBJ43CD-M3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ43CD-M3/I Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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PESD2V0Y1BSFYL
Nexperia USA Inc.
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DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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Diodes Incorporated
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