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Vishay General Semiconductor - Diodes Division SMBJ75A-E3/5B
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- Part No.:
- SMBJ75A-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ75A-E3/5B.pdf
- Description:
- TVS DIODE 75VWM 121VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,501
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Product details
Overview
SMBJ75A-E3/5B from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping fast-rising ESD and surge transients on DC power rails and signal lines. It features 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 - used to protect MOSFET gate drivers and industrial sensor interfaces.
For engineers reviewing the SMBJ75A-E3/5B datasheet, SMBJ75A-E3/5B pinout, SMBJ75A-E3/5B application, or SMBJ75A-E3/5B equivalent, key selection criteria include unidirectional polarity, 1.0 µA max reverse leakage at VWM, -55 °C to +150 °C operating junction temperature, RoHS-compliant matte tin-plated leads, and compatibility with automated SMT placement on standard PCB pads.
Technical Context
The SMBJ75A-E3/5B operates as a silicon avalanche diode that enters breakdown when reverse voltage exceeds its VBR range (83.3–92.1 V), diverting transient energy to ground while limiting downstream voltage to ≤121 V at 5.0 A. Its low incremental surge resistance and <1 ns response time enable effective suppression of ESD (IEC 61000-4-2) and lightning-induced surges (IEC 61000-4-5).
Thermally, it exhibits RθJA = 100 °C/W (junction-to-ambient, on 0.2" × 0.2" copper pads) and RθJL = 20 °C/W (junction-to-lead), supporting continuous power dissipation of 5.0 W at TA = 50 °C. The device meets MSL Level 1 per J-STD-020 and is rated for 100 A non-repetitive forward surge (8.3 ms half-sine) - critical for inductive load switching protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 75 V - Maximum continuous reverse working voltage before clamping begins; sets safe operating margin for 60–72 V nominal DC rails. |
| VBR @ IT = 1.0 mA | 83.3–92.1 V - Breakdown onset range; ensures reliable turn-on above system overvoltage thresholds without premature conduction. |
| VC @ IPPM = 5.0 A | 121 V - Clamped voltage during 10/1000 µs surge; defines worst-case stress on protected ICs or MOSFETs. |
| PPPM | 600 W - Peak pulse power handling capability; supports robust protection against 100 A surge events on 12 Ω source impedance. |
| IR @ VWM | ≤1.0 µA - Ultra-low reverse leakage; avoids parasitic loading on high-impedance sensor bias networks or battery-backed circuits. |
| TJ Range | -55 °C to +150 °C - Extended thermal envelope enables deployment in automotive under-hood, industrial motor drives, and outdoor telecom equipment. |
| Package | SMB (DO-214AA) - Standardized 2-pin surface-mount outline with 5.59 mm max length, compatible with IPC-7351B footprint and reflow profiles up to 260 °C peak. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads; cathode indicated by band marking on one end; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/Line side (cathode-banded end is output/load side) | Connected to protected line (e.g., 75 V supply rail); reverse-biased during normal operation; conducts only during overvoltage events. |
| Cathode | Ground reference / clamping node | Connected to system ground plane; provides low-inductance path for surge current; must be routed with minimal trace length to maintain clamping efficacy. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables single-device protection against IEC 61000-4-5 Level 4 surges (4 kV line-earth) on 48–75 V systems without parallel staging. |
| 121 V clamping voltage at 5.0 A | Limits transient overshoot to safe levels for 100 V-rated MOSFETs and industrial-grade microcontrollers in PLC I/O modules. |
| MSL Level 1, 260 °C peak reflow | Supports lead-free assembly without moisture sensitivity concerns; eliminates pre-bake requirement in high-volume SMT lines. |
| Glass passivated junction | Ensures stable VBR and low leakage over 10+ years in humid environments (e.g., HVAC control boards, outdoor lighting drivers). |
| RoHS-compliant, commercial grade (E3 suffix) | Meets global environmental compliance mandates; suitable for consumer electronics, industrial automation, and telecom infrastructure. |
Applications
| Industrial Motor Drive Protection | Telecom Power Supply Clamp |
|---|---|
|
Use Scenario: Suppresses voltage spikes caused by IGBT turn-off in 72 V DC bus inverters driving servo motors. IC Role / Device Role / Timing Role: Unidirectional TVS placed across DC bus input to clamp inductive kickback before it reaches upstream DC-DC converters. Use Value: Prevents repeated failure of 100 V input-rated buck controllers by limiting transients to ≤121 V, extending mean time between failures (MTBF) by >5×. |
Use Scenario: Guards primary-side 75 V auxiliary supply in 48 V PoE-powered base station radios against lightning-induced surges. IC Role / Device Role / Timing Role: Standoff-clamp element located immediately after input filter, shunting surge energy before EMI filters saturate. Use Value: Maintains system uptime by surviving 4 kV/2 Ω combination wave surges per IEC 61000-4-5, eliminating field returns due to power-stage damage. |
| Automotive Body Control Module | Industrial Sensor Signal Line Guard |
|
Use Scenario: Protects LIN bus transceivers and microcontroller GPIOs from load dump and jump-start transients in 12 V/24 V hybrid vehicle BCMs. IC Role / Device Role / Timing Role: Secondary-level clamp on 75 V regulated supply rail feeding CAN/LIN interface ICs. Use Value: Ensures functional safety compliance (ISO 16750-2) by clamping 120 V/250 ms load dump events to <125 V, preventing latch-up in communication peripherals. |
Use Scenario: Shields analog outputs (0–10 V, 4–20 mA) of pressure/temperature sensors in factory automation against cable-coupled noise. IC Role / Device Role / Timing Role: Low-leakage (≤1 µA) TVS mounted at connector entry point to prevent false triggering of ADC references. Use Value: Eliminates measurement drift and calibration loss during ESD events (±8 kV contact), preserving sensor accuracy over full product lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ75A-M3/5B | Halogen-free, RoHS-compliant variant with identical electrical specs and SMB package; same VWM, VBR, VC, PPPM. | Required where halogen-free material compliance (e.g., IEC 61249-2-21) is mandated for end-equipment environmental certification. | Select SMBJ75A-M3/5B when final product requires halogen-free bill-of-materials documentation and traceability. |
| SMCJ75A-E3/57 | Same VWM/VBR/VC ratings but in larger SMC (DO-214AB) package; higher PPPM = 1500 W; RθJA = 50 °C/W. | Suitable for higher-energy surge environments (e.g., outdoor AC/DC adapters, solar charge controllers) where 600 W is insufficient. | Choose SMCJ75A-E3/57 only if board layout allows larger footprint and thermal design supports ≥1500 W pulse handling. |
Compared with SMBJ75A-E3/5B, the M3 variant offers identical protection performance with halogen-free construction, while the SMCJ75A-E3/57 delivers 2.5× higher surge capacity in a physically larger package - making SMBJ75A-E3/5B optimal for space-constrained 600 W-class industrial and telecom applications.
Availability
SMBJ75A-E3/5B is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, automotive body control modules, and industrial sensor interfaces requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for SMBJ75A-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, TVS devices, and optoelectronics with emphasis on reliability, power efficiency, and application-specific performance.
The SMBJ series was developed for high-reliability transient suppression in compact surface-mount designs - targeting industrial automation, automotive subsystems, and communications infrastructure where space, thermal performance, and surge immunity are critical.
FAQ
What is the maximum clamping voltage of SMBJ75A-E3/5B at its rated peak pulse current?
The SMBJ75A-E3/5B has a maximum clamping voltage (VC) of 121 V at 5.0 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured per JEDEC test conditions and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring compatibility with 100 V-rated downstream components in the SMBJ75A-E3/5B application chain.
Is SMBJ75A-E3/5B suitable for bidirectional transient suppression?
No, SMBJ75A-E3/5B is a unidirectional TVS diode, identified by the "A" suffix and cathode band marking. For bidirectional protection, Vishay specifies the "CA" suffix (e.g., SMBJ75CA). Using SMBJ75A-E3/5B in bidirectional signal paths would result in forward conduction during negative transients, potentially damaging the device or failing to suppress - always verify polarity alignment before placing SMBJ75A-E3/5B in circuit.
What is the reverse leakage current specification for SMBJ75A-E3/5B at its stand-off voltage?
The SMBJ75A-E3/5B exhibits a maximum reverse leakage current (ID) of 1.0 µA at its 75 V stand-off voltage (VWM) and TA = 25 °C. This ultra-low leakage ensures minimal power loss and signal integrity impact in high-impedance monitoring circuits, battery-operated sensors, and precision analog front-ends where SMBJ75A-E3/5B is commonly deployed.
Does SMBJ75A-E3/5B meet automotive qualification standards?
The base SMBJ75A-E3/5B is commercial-grade and not AEC-Q101 qualified. Vishay offers automotive variants under ordering codes such as SMBJ75AHE3_B/I (with HE3 suffix), which include full AEC-Q101 stress testing and extended temperature validation. For automotive applications requiring qualification, SMBJ75A-E3/5B must be replaced with its HE3 or HM3 counterpart - SMBJ75A-E3/5B itself is intended for industrial and telecom use only.
What is the thermal resistance junction-to-ambient for SMBJ75A-E3/5B under standard mounting conditions?
The SMBJ75A-E3/5B 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 - per Vishay's recommended pad layout. This value directly impacts steady-state power derating; for example, at ambient 50 °C, SMBJ75A-E3/5B supports 5.0 W continuous dissipation, aligning with its published PD rating.
SMBJ75A-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:
- 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-E3/5B FAQ
1.How can I place an order for SMBJ75A-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ75A-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 SMBJ75A-E3/5B reliable?
The price and inventory of SMBJ75A-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 SMBJ75A-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ75A-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ75A-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ75A-E3/5B?
SMBJ75A-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ75A-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 SMBJ75A-E3/5B?
For technical support, including SMBJ75A-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ75A-E3/5B requirements.
6.How does Aetrix verify that SMBJ75A-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ75A-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 SMBJ75A-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ75A-E3/5B?
All SMBJ75A-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ75A-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 SMBJ75A-E3/5B part is unused and in its original packaging.
Return procedure for SMBJ75A-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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