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Vishay General Semiconductor - Diodes Division SMBJ75A-M3/5B
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- Part No.:
- SMBJ75A-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ75A-M3/5B.pdf
- Description:
- TVS DIODE 75VWM 121VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,975
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Product details
Overview
SMBJ75A-M3/5B from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 75 V stand-off voltage (VWM), 83.3–92.1 V breakdown voltage (VBR) at 1.0 mA, 121 V maximum clamping voltage (VC) at 5.0 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed in industrial motor drives, automotive ECUs, and PoE-powered Ethernet interfaces.
For engineers reviewing the SMBJ75A-M3/5B datasheet, SMBJ75A-M3/5B pinout, SMBJ75A-M3/5B application, or SMBJ75A-M3/5B equivalent, this page delivers verified electrical parameters, thermal derating behavior, clamping performance under surge conditions, and precise mechanical mounting guidance per J-STD-002 solderability standards.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: under normal bias it presents high impedance (<1.0 µA leakage at 75 V), then rapidly avalanches below 121 V to divert transient energy away from downstream ICs. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low incremental surge resistance.
Thermal design relies on its RθJA = 100 °C/W (on 0.2" × 0.2" copper pads) and RθJL = 20 °C/W, enabling reliable operation up to TJ = +150 °C. The M3 suffix confirms halogen-free, RoHS-compliant construction meeting JESD201 Class 2 whisker resistance and MSL Level 1 reflow profile (260 °C peak).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 75 V - Maximum continuous reverse operating voltage before significant leakage; sets upper limit for protected line's nominal DC rail. |
| VBR @ IT = 1.0 mA | 83.3–92.1 V - Breakdown onset range; defines minimum clamping threshold and ensures margin above VWM. |
| VC @ IPPM = 5.0 A | 121 V - Clamped voltage during 10/1000 µs surge; determines maximum stress imposed on downstream components. |
| PPPM | 600 W - Peak pulse power handling capability; validates suitability for IEC 61000-4-5 Level 3 (1 kV/2 Ω) surges. |
| IPPM | 5.0 A - Peak pulse current corresponding to VC = 121 V; used with PCB trace inductance to estimate actual clamping overshoot. |
| TJ max. | +150 °C - Maximum junction temperature; supports operation in under-hood automotive or enclosed industrial enclosures. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with cathode band marking; compatible with automated pick-and-place and reflow. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads, UL 94 V-0 rated compound, polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest potential node; completes conduction path during avalanche event. |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., 75 V supply rail); avalanche initiates here when voltage exceeds VBR. |
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 and automotive applications. |
| Clamping ratio VC/VBR ≈ 1.31 | Indicates low dynamic impedance (~15.2 Ω), enabling effective suppression without excessive voltage overshoot. |
| MSL Level 1, 260 °C peak reflow | Supports single-pass lead-free reflow assembly without moisture-induced popcorn failure or delamination. |
| Halogen-free, RoHS-compliant (M3 suffix) | Fulfills environmental compliance mandates for EU, China RoHS, and JEITA EG02, with no brominated flame retardants. |
| 150 °C maximum junction temperature | Enables deployment in high-ambient environments such as engine control units or sealed power converters. |
Applications
| Industrial Motor Drives | Automotive Engine Control Units |
|---|---|
|
Use Scenario: Protection of 72 V battery-fed gate drivers and sensor inputs against load dump and inductive kickback. IC Role / Device Role / Timing Role: Shunt clamping device placed directly across MOSFET gate-source or microcontroller supply pins. Use Value: Limits transient voltage to ≤121 V during 5 A surges, preventing gate oxide rupture and logic upset in 32-bit MCUs. |
Use Scenario: Guarding LIN bus transceivers and fuel injector drivers against ISO 7637-2 Pulse 1/2a/5a transients. IC Role / Device Role / Timing Role: Unidirectional TVS connected between LIN line and chassis ground, with cathode to LIN. Use Value: Maintains <1.0 µA leakage at 12 V nominal while clamping 100 V spikes to 121 V within nanoseconds. |
| Telecom Power Feeds | Industrial PLC I/O Modules |
|
Use Scenario: Surge protection on 48 V DC power input of remote radio units and base station backhaul equipment. IC Role / Device Role / Timing Role: Primary front-end clamp ahead of DC-DC converters and hot-swap controllers. Use Value: Absorbs 600 W pulses without degradation, preserving converter reliability during lightning-induced surges on outdoor cabling. |
Use Scenario: Input protection for 24 V digital input cards exposed to field wiring transients in factory automation. IC Role / Device Role / Timing Role: Mounted at connector entry point, cathode to 24 V rail, anode to common return. Use Value: Withstands repeated 5 A surges while maintaining VWM = 75 V margin above 24 V system rail, ensuring long-term stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ75A-E3/5B | Same electrical specs; RoHS-compliant but contains brominated flame retardants (non-halogen-free). | Acceptable for commercial-grade systems where halogen-free mandate does not apply. | Select when cost sensitivity outweighs halogen-free requirement and AEC-Q101 is not needed. |
| SMBJ75AHM3_B/I | Identical electrical and thermal specs; HM3 suffix adds AEC-Q101 qualification and 13" tape/reel packaging. | Required for automotive OEM designs needing PPAP documentation and extended temperature validation. | Choose for automotive applications requiring formal qualification evidence and higher-volume reel packaging. |
Compared with SMBJ75A-M3/5B, the E3 variant trades halogen-free compliance for lower cost in non-automotive settings, while the HM3 variant adds AEC-Q101 validation and larger reels - making SMBJ75A-M3/5B the optimal balance of environmental compliance, commercial qualification, and standard packaging for industrial power rail protection.
Availability
SMBJ75A-M3/5B is available at Aetrix Electronics and suitable for industrial motor drives, automotive engine control units, and telecom power feeds requiring stable component supply, consistent halogen-free material content, and J-STD-002 solderability assurance.
Supply support for SMBJ75A-M3/5B 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, MOSFETs, and protection devices with emphasis on reliability, power efficiency, and automotive-grade qualification.
The SMBJ series targets board-level transient suppression in harsh environments, delivering standardized 600 W surge capability across 5.0–188 V VWM range in compact SMB packages for space-constrained industrial and transportation systems.
FAQ
What is the maximum clamping voltage of SMBJ75A-M3/5B at its rated peak pulse current?
The SMBJ75A-M3/5B exhibits a maximum clamping voltage (VC) of 121 V when subjected to its specified peak pulse current of 5.0 A using the 10/1000 µs waveform. This value is measured under standardized test conditions per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMBJ75A-M3/5B maintains this clamping performance across its qualified operating temperature range.
Does SMBJ75A-M3/5B meet automotive qualification standards?
No, SMBJ75A-M3/5B is commercially qualified and halogen-free (M3 suffix) but not AEC-Q101 certified. For automotive applications requiring formal qualification, Vishay offers the SMBJ75AHM3_B/I variant, which carries AEC-Q101 qualification alongside identical electrical specifications. The SMBJ75A-M3/5B remains suitable for industrial and telecom systems where AEC-Q101 is not mandated.
What is the thermal resistance from junction to ambient for SMBJ75A-M3/5B?
The SMBJ75A-M3/5B 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, as defined in the Vishay datasheet. This value assumes standard FR-4 PCB layout and natural convection cooling; actual thermal performance depends on board copper area, airflow, and adjacent heat sources. The SMBJ75A-M3/5B also specifies RθJL = 20 °C/W for junction-to-lead conduction.
How does the M3 suffix affect the material composition of SMBJ75A-M3/5B?
The M3 suffix on SMBJ75A-M3/5B indicates halogen-free, RoHS-compliant construction - specifically, the molding compound contains no brominated or chlorinated flame retardants, satisfying JEDEC JS709 and IEC 61249-2-21 requirements. This distinguishes it from the E3 variant, which is RoHS-compliant but not halogen-free. The SMBJ75A-M3/5B retains full electrical and thermal equivalence to E3 parts while meeting stricter environmental mandates.
Can SMBJ75A-M3/5B be used in bidirectional protection circuits?
No, SMBJ75A-M3/5B is a unidirectional TVS diode, identifiable by its cathode band marking and specified only for reverse-biased operation. For bidirectional protection, Vishay offers the SMBJ75CA variant (e.g., SMBJ75CA-M3/5B), which provides symmetrical clamping in both polarities. Using SMBJ75A-M3/5B in a bidirectional configuration would result in forward conduction and potential failure during positive transients.
SMBJ75A-M3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 75V
- Voltage - Breakdown (Min):
- 83.3V
- Voltage - Clamping (Max) @ Ipp:
- 121V
- Current - Peak Pulse (10/1000µs):
- 5A
- 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)
SMBJ75A-M3/5B FAQ
1.How can I place an order for SMBJ75A-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ75A-M3/5B 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 SMBJ75A-M3/5B reliable?
The price and inventory of SMBJ75A-M3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ75A-M3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ75A-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ75A-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ75A-M3/5B?
SMBJ75A-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ75A-M3/5B 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 SMBJ75A-M3/5B?
For technical support, including SMBJ75A-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ75A-M3/5B requirements.
6.How does Aetrix verify that SMBJ75A-M3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ75A-M3/5B 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 SMBJ75A-M3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ75A-M3/5B?
All SMBJ75A-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ75A-M3/5B, 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 SMBJ75A-M3/5B part is unused and in its original packaging.
Return procedure for SMBJ75A-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ75A-M3/5B Tags
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