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Vishay General Semiconductor - Diodes Division SMBJ75CD-M3/I
- Part No.:
- SMBJ75CD-M3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ75CD-M3/I.pdf
- Description:
- TVS DIODE 75VWM 119VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,568
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Product details
Overview
SMBJ75CD-M3/I from Vishay General Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal and power lines. It features a 75 V stand-off voltage (VWM), 84.6–90.8 V breakdown voltage (VBR) at 1 mA, 119 V maximum clamping voltage (VC) at 5.06 A peak pulse current, and 600 W peak pulse power rating with 10/1000 μs waveform.
For engineers reviewing the SMBJ75CD-M3/I datasheet, SMBJ75CD-M3/I pinout, SMBJ75CD-M3/I application, or SMBJ75CD-M3/I equivalent, this device is selected for robust overvoltage protection in industrial sensor interfaces, telecom line cards, DC power rails, and automotive body electronics where bidirectional surge immunity and low leakage (<0.5 μA at VWM) are critical.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, enabling protection of AC-coupled or floating signal paths without polarity constraints. Its silicon avalanche structure delivers sub-nanosecond response time and low dynamic impedance, ensuring effective clamping before sensitive downstream components experience overstress.
The device complies with IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and IEC 61000-4-5 (surge) standards when applied with appropriate PCB layout-specifically using minimum recommended 5.0 mm × 5.0 mm copper pad area to maintain thermal performance and achieve rated 600 W pulse power handling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 75 V - Maximum continuous reverse operating voltage before significant leakage; defines safe working margin for 72 V nominal DC rails. |
| VBR min/max | 84.6 V / 90.8 V at 1 mA - Tight ±3.5 % tolerance ensures predictable turn-on across production lots. |
| VC @ IPPM | 119 V at 5.06 A - Clamping voltage under full 600 W surge; limits stress on protected ICs to safe levels. |
| PPPM | 600 W (10/1000 μs) - Peak transient energy absorption capability; validated per IEC 61000-4-5 Level 3/4. |
| ID @ VWM | <0.5 μA - Ultra-low leakage preserves signal integrity and battery life in always-on circuits. |
| TJ max | +150 °C - Enables operation in under-hood automotive or enclosed industrial enclosures. |
| Package | SMB (DO-214AA) - Surface-mount footprint compatible with automated assembly; M3 suffix denotes halogen-free, RoHS-compliant, JESD201 Class 2 whisker-resistant finish. |
Pinout & Package
Two-terminal bidirectional device in SMB (DO-214AA) package; no polarity marking required. Cathode band omitted per bidirectional design convention. Terminals are matte tin-plated, solderable per J-STD-002 and JESD22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically; conducts avalanche current in either direction once VBR is exceeded. |
| Case (cathode band absent) | Thermal and mechanical interface | No electrical connection; SMB body provides thermal path to PCB copper; requires 5.0 mm × 5.0 mm pad for rated power dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., RS-485), or floating power domains without external polarity management. |
| ±3.5 % VBR tolerance | Reduces design margin overhead and eliminates need for derating-based over-specification in high-reliability systems. |
| 600 W peak pulse rating | Withstands IEC 61000-4-5 combination wave surges up to 1 kV/42 Ω (line-to-ground) or 2 kV/12 Ω (line-to-line) without degradation. |
| MSL Level 1 (260 °C) | Compatible with standard lead-free reflow profiles; no pre-baking required prior to assembly. |
| Halogen-free & RoHS | Meets IPC-1752A material declaration requirements for industrial and automotive supply chains. |
Applications
| Industrial Sensor Interface | Telecom Line Card Protection |
|---|---|
Use Scenario: Protecting analog output (4–20 mA) and digital I/O (RS-485) lines in factory automation sensors exposed to motor switching noise and ESD. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed directly at connector entry point, shunting transients before signal conditioning amplifiers or isolators. Use Value: Limits induced voltage to ≤119 V during 1 kV/500 A surge events, preserving ADC reference stability and preventing latch-up in microcontrollers. | Use Scenario: Safeguarding Ethernet PHY and PoE controller inputs on carrier-grade DSLAM and ONU line cards subjected to lightning-induced surges on twisted-pair lines. IC Role / Device Role / Timing Role: First-stage transient suppressor on RJ-45 interface side, coordinated with GDT or polymer PTC secondary protection. Use Value: Responds within <1 ns to divert >95 % of 10/1000 μs surge energy, maintaining signal integrity through IEEE 802.3af/at compliance testing. |
| Automotive Body Control Module | DC Power Rail Protection |
Use Scenario: Securing LIN bus and switched 12 V power lines in BCMs against load dump (ISO 7637-2 Pulse 5a) and jump-start transients. IC Role / Device Role / Timing Role: Bidirectional clamp on LIN data line and auxiliary 12 V supply rail, mounted adjacent to connector. Use Value: Withstands repetitive 25 V/100 ms load dump spikes while maintaining <0.5 μA leakage at 13.5 V nominal, minimizing quiescent current drain. | Use Scenario: Guarding input stage of DC-DC converters powering FPGA or ASIC core logic in embedded computing platforms. IC Role / Device Role / Timing Role: Input-side TVS placed upstream of EMI filter and converter IC to prevent damage from hot-swap or backfeed events. Use Value: Clamps 600 W surges to 119 V, allowing downstream ceramic capacitors and MOSFETs to remain within SOA limits without oversized derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ75CA-E3/52 (Vishay) | Same VWM/VBR/VC specs; differs only in packaging (tape-and-reel quantity and reel diameter) and M3 vs. -E3 suffix compliance grading. | No functional difference; -E3/52 is legacy packaging variant with identical electrical and thermal performance. | Select SMBJ75CD-M3/I for new designs requiring halogen-free, JESD201 Class 2 whisker resistance and 13″ reel logistics. |
| P6SMB75CA (ON Semiconductor) | Identical SMB package, 75 V VWM, 84.6–90.8 V VBR, 119 V VC; minor differences in leakage (≤1 μA vs. ≤0.5 μA) and thermal resistance (RθJA = 130 °C/W vs. 125 °C/W). | Valid for same IEC 61000-4-5 Level 3 applications but may require margin check on high-temperature PCB layouts due to slightly higher RθJA. | Use P6SMB75CA only if dual-sourcing is mandated and thermal derating analysis confirms adequate margin at max TJ. |
Compared with SMBJ75CD-M3/I, SMBJ75CA-E3/52 offers identical protection performance with legacy packaging, while P6SMB75CA provides second-source availability with marginally higher leakage and thermal resistance-requiring verification in thermally constrained designs.
Availability
SMBJ75CD-M3/I is available at Aetrix Electronics and suitable for industrial sensor interfaces, telecom line card protection, and automotive body control modules requiring stable component supply, long-term lifecycle support, and traceable halogen-free sourcing.
Supply support for SMBJ75CD-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 automotive-grade qualification.
The SMBJ series is engineered for high-energy transient suppression in harsh environments, targeting applications demanding consistent clamping performance, tight VBR tolerance, and robust surface-mount manufacturability.
FAQ
What is the clamping voltage of SMBJ75CD-M3/I under maximum rated surge current?
The SMBJ75CD-M3/I exhibits a maximum clamping voltage (VC) of 119 V when subjected to its peak pulse current (IPPM) of 5.06 A, measured using the standardized 10/1000 μs waveform. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuitry during surge events. The SMBJ75CD-M3/I maintains this clamping performance without degradation under repetitive surge conditions at ≤0.01 % duty cycle.
Is SMBJ75CD-M3/I suitable for protecting RS-485 communication lines?
Yes, SMBJ75CD-M3/I is well-suited for RS-485 line protection due to its bidirectional architecture, which matches the differential nature of the bus, and its 119 V clamping voltage that safeguards transceivers rated for ≥±15 V common-mode range. Its low capacitance (<100 pF) avoids signal edge distortion at typical RS-485 data rates up to 10 Mbps. The SMBJ75CD-M3/I must be placed at the connector interface with proper PCB layout-using symmetric traces and ground plane coupling-to ensure balanced transient diversion.
How does the M3 suffix affect the SMBJ75CD-M3/I specification?
The M3 suffix on SMBJ75CD-M3/I indicates halogen-free molding compound, RoHS compliance, industrial-grade qualification, and passing JESD201 Class 2 whisker resistance testing. It does not alter electrical parameters such as VWM, VBR, or VC. The M3 designation ensures suitability for high-reliability manufacturing environments where tin whisker mitigation and environmental compliance are mandatory-critical for automotive and industrial deployments. The SMBJ75CD-M3/I retains all baseline TVS performance while meeting extended material and process requirements.
What is the maximum junction temperature rating for SMBJ75CD-M3/I?
The SMBJ75CD-M3/I has a maximum junction temperature (TJ max) rating of +150 °C, verified per JEDEC test methods and supported by its thermal resistance profile (RθJA = 125 °C/W on minimum pad, RθJM = 20 °C/W). This allows reliable operation in under-hood automotive locations, sealed industrial enclosures, and high-power-density PCBs where ambient temperatures exceed +85 °C. Derating curves in the Vishay datasheet (Fig. 5) define allowable power dissipation versus ambient temperature to ensure the SMBJ75CD-M3/I remains within its safe operating area.
Can SMBJ75CD-M3/I replace unidirectional TVS diodes like SMBJ75D-M3/I in existing designs?
No-SMBJ75CD-M3/I is strictly bidirectional and cannot substitute for unidirectional SMBJ75D-M3/I without circuit review. While both share identical VWM (75 V), VBR (84.6–90.8 V), and VC (119 V), the unidirectional version requires correct cathode orientation relative to DC bias, whereas the bidirectional SMBJ75CD-M3/I conducts equally in both directions. Replacing SMBJ75D-M3/I with SMBJ75CD-M3/I on a DC rail may cause unintended conduction or increased leakage if reverse-biased voltage exceeds VWM. Always verify polarity requirements and signal topology before interchanging SMBJ75CD-M3/I and unidirectional variants.
SMBJ75CD-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):
- 75V
- Voltage - Breakdown (Min):
- 84.6V
- Voltage - Clamping (Max) @ Ipp:
- 119V
- Current - Peak Pulse (10/1000µs):
- 5.06A
- 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)
SMBJ75CD-M3/I FAQ
1.How can I place an order for SMBJ75CD-M3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ75CD-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 SMBJ75CD-M3/I reliable?
The price and inventory of SMBJ75CD-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 SMBJ75CD-M3/I is usually 5 days.
3.What payment methods are accepted for SMBJ75CD-M3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ75CD-M3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ75CD-M3/I?
SMBJ75CD-M3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ75CD-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 SMBJ75CD-M3/I?
For technical support, including SMBJ75CD-M3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ75CD-M3/I requirements.
6.How does Aetrix verify that SMBJ75CD-M3/I is sourced from the original manufacturer or authorized distributors?
All SMBJ75CD-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 SMBJ75CD-M3/I meets industry standards.
7.What is the process for return or replacement of SMBJ75CD-M3/I?
All SMBJ75CD-M3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ75CD-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 SMBJ75CD-M3/I part is unused and in its original packaging.
Return procedure for SMBJ75CD-M3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ75CD-M3/I Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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