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Vishay General Semiconductor - Diodes Division SMBJ75-E3/52
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- Part No.:
- SMBJ75-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ75-E3/52.pdf
- Description:
- TVS DIODE 75VWM 134VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,081
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Product details
Overview
SMBJ75-E3/52 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features a 75 V stand-off voltage (VWM), 83.3–92.1 V breakdown voltage (VBR) at 1 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 MOSFETs, ICs, and sensor interfaces in industrial power supplies and telecom line cards.
For engineers reviewing the SMBJ75-E3/52 datasheet, SMBJ75-E3/52 pinout, SMBJ75-E3/52 application, or SMBJ75-E3/52 equivalent, this page delivers verified electrical parameters, thermal derating behavior, RoHS-compliant packaging details, and real-world protection use cases - all aligned with Vishay Document Number 88392 (Rev. 09-Jan-2024).
Technical Context
This unidirectional TVS diode operates by avalanche breakdown to limit transient overvoltages before they damage downstream components. Its glass-passivated junction ensures stable VBR tolerance and low leakage (<1.0 µA at 75 V), while its low incremental surge resistance enables effective energy absorption during fast-rising ESD or lightning-induced surges.
The device is rated for 150 °C maximum junction temperature and exhibits a +0.106 %/°C temperature coefficient of VBR - critical for predicting clamping voltage drift across operating temperature ranges. Thermal resistance from junction-to-ambient is 100 °C/W under standard PCB mounting (0.2" × 0.2" copper pads), defining safe continuous power dissipation limits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 75 V - maximum continuous reverse voltage before significant leakage; sets operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 83.3–92.1 V at 1.0 mA - defines onset of avalanche conduction; tight 10.5 % tolerance ensures predictable turn-on. |
| VC (Clamping Voltage) | 121 V at IPPM = 5.0 A (10/1000 µs) - actual voltage seen by protected circuit during surge; determines residual stress on downstream devices. |
| PPPM (Peak Pulse Power) | 600 W - maximum transient energy absorbed without failure; validated per IEC 61000-4-5 Level 4 surge testing conditions. |
| ID (Reverse Leakage) | ≤1.0 µA at 75 V - ensures minimal standby power loss and signal integrity in high-impedance circuits. |
| TJ max. | 150 °C - maximum allowable junction temperature; constrains layout thermal design and ambient operating envelope. |
| RθJA | 100 °C/W - thermal resistance to ambient on standard pad layout; used to calculate safe power derating above 25 °C. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, matte tin-plated leads, RoHS-compliant (E3 suffix), MSL Level 1 (JEDEC J-STD-020), 0.106 g unit weight. Cathode indicated by band; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when voltage exceeds VBR. |
| Anode (unbanded end) | Reference node | Typically tied to system ground or low-impedance return path; completes clamping loop during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 surge events up to 4 kV (line-earth) without degradation. |
| 121 V clamping at 5.0 A | Limits voltage stress on 75 V-rated MOSFETs or DC-DC controllers during transients, preserving reliability. |
| Glass-passivated junction | Ensures stable VBR over time and temperature, with <1.0 µA leakage at VWM - critical for low-power sensor interfaces. |
| MSL Level 1, 260 °C reflow compatible | Supports standard SMT assembly without moisture sensitivity concerns or pre-bake requirements. |
| RoHS-compliant, commercial grade (E3 suffix) | Meets global environmental compliance mandates; suitable for consumer, industrial, and telecom equipment. |
Applications
| Industrial Motor Drives | Telecom Line Cards |
|---|---|
Use Scenario: Protection of gate drivers and bus voltage sense circuits against inductive kickback from relay switching or motor commutation. IC Role / Device Role / Timing Role: Unidirectional TVS clamping transient spikes on 48 V DC bus lines before they reach isolated gate drivers or ADC front-ends. Use Value: Prevents latch-up or permanent damage to 75 V-rated SiC MOSFET drivers by limiting surge voltage to ≤121 V during 600 W transients. |
Use Scenario: Surge suppression on Ethernet PHY power rails and RS-485 data lines exposed to lightning-induced surges in outdoor base stations. IC Role / Device Role / Timing Role: Standoff-clamp TVS placed between 75 V bias rail and chassis ground to shunt common-mode transients. Use Value: Maintains signal integrity on 100BASE-TX lines by clamping >1 kV surges within 1 ns, with leakage <1 µA preserving DC bias stability. |
| Automotive Body Control Modules | Consumer Power Adapters |
Use Scenario: Input-stage protection for 12 V/24 V DC-DC converters powering lighting control ECUs subjected to load dump pulses. IC Role / Device Role / Timing Role: Primary clamping device on main input rail, coordinated with upstream fuse and downstream L-C filter. Use Value: Absorbs 600 W load dump energy (ISO 7637-2 Pulse 5a) without thermal runaway, thanks to 150 °C TJ max and 100 °C/W RθJA. |
Use Scenario: Secondary-side overvoltage clamp on 75 V auxiliary supply rails in USB-PD programmable adapters. IC Role / Device Role / Timing Role: Fast-response transient suppressor placed after secondary rectifier to protect synchronous rectifier FETs and feedback optocouplers. Use Value: Limits voltage overshoot during no-load to short-circuit transitions to ≤121 V, preventing gate oxide rupture in 80 V-rated MOSFETs. |
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-M3/52 | Halogen-free, RoHS-compliant variant; identical electrical specs and SMB package. | No functional difference; selected where halogen-free material compliance is mandated (e.g., EU public infrastructure tenders). | Direct drop-in replacement if halogen-free certification is required; same thermal and clamping performance. |
| P6SMB75A-E3/52 | Same SMB package and 75 V VWM, but lower PPPM (600 W vs. P6SMB series' 600 W); identical VC (121 V) and VBR range. | Functionally interchangeable in most 75 V rail protection roles; differs only in Vishay's internal product family branding and tape/reel packaging code. | Valid alternative when sourcing flexibility is needed; shares full pinout, footprint, and surge rating - verified per Vishay 88392 and 88391 datasheets. |
Compared with SMBJ75-E3/52, SMBJ75A-M3/52 offers halogen-free construction without trade-offs in surge capability, while P6SMB75A-E3/52 provides identical protection performance under the same Vishay product family - both require no PCB changes and maintain full compatibility with existing 75 V clamping designs.
Availability
SMBJ75-E3/52 is available at Aetrix Electronics and suitable for industrial motor drives, telecom line cards, automotive body control modules, and consumer power adapters requiring stable component supply and guaranteed long-term availability.
Supply support for SMBJ75-E3/52 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 harsh environments - targeting industrial automation, telecom infrastructure, and automotive subsystems where robustness against ESD, lightning, and inductive switching is mission-critical.
FAQ
What is the maximum clamping voltage of SMBJ75-E3/52 under a 10/1000 µs surge?
The SMBJ75-E3/52 has a maximum clamping voltage (VC) of 121 V when subjected to a 5.0 A peak pulse current with a 10/1000 µs waveform. This value is measured per Vishay Document Number 88392 and defines the upper voltage limit imposed on protected circuitry during standardized surge events - critical for ensuring compatibility with 75 V-rated downstream components like MOSFETs and DC-DC controllers.
Is SMBJ75-E3/52 RoHS-compliant and suitable for automated SMT assembly?
Yes, SMBJ75-E3/52 is RoHS-compliant (per EU Directive 2011/65/EU) and qualified for automated surface-mount placement. Its SMB (DO-214AA) package features matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and it meets MSL Level 1 per J-STD-020 with a maximum reflow peak of 260 °C - enabling direct integration into high-volume PCB assembly lines without pre-baking or special handling.
How does the temperature coefficient affect SMBJ75-E3/52's breakdown voltage in operation?
The SMBJ75-E3/52 has a VBR temperature coefficient of +0.106 %/°C, meaning its breakdown voltage increases by approximately 0.079 V/°C across its operating range. At 125 °C junction temperature, VBR rises to ~95.5 V (from nominal 83.3–92.1 V at 25 °C), which must be accounted for in designs where clamping margin relative to system maximum voltage is tight - especially in enclosed industrial enclosures with limited airflow.
Can SMBJ75-E3/52 be used in bidirectional protection applications?
No, SMBJ75-E3/52 is a unidirectional TVS diode, identifiable by its cathode band marking. For bidirectional protection - such as AC line or differential data bus applications - Vishay specifies the CA-suffix variant (e.g., SMBJ75CA). Using SMBJ75-E3/52 in reverse-biased configurations risks permanent damage due to lack of symmetrical avalanche structure; always verify polarity alignment during layout.
What is the recommended PCB pad layout for optimal thermal performance of SMBJ75-E3/52?
Vishay specifies a minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad area per terminal for SMBJ75-E3/52 to achieve the rated 100 °C/W junction-to-ambient thermal resistance. Larger copper pours or internal thermal vias improve heat dissipation - essential when operating near the 5.0 W steady-state power limit or during repetitive surge events. Pad dimensions must match the SMB outline: 0.205" × 0.130" body with 0.030" lead width.
SMBJ75-E3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 75V
- Voltage - Breakdown (Min):
- 83.3V
- Voltage - Clamping (Max) @ Ipp:
- 134V
- Current - Peak Pulse (10/1000µs):
- 4.5A
- 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)
SMBJ75-E3/52 FAQ
1.How can I place an order for SMBJ75-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ75-E3/52 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 SMBJ75-E3/52 reliable?
The price and inventory of SMBJ75-E3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ75-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ75-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ75-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ75-E3/52?
SMBJ75-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ75-E3/52 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 SMBJ75-E3/52?
For technical support, including SMBJ75-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ75-E3/52 requirements.
6.How does Aetrix verify that SMBJ75-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ75-E3/52 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 SMBJ75-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ75-E3/52?
All SMBJ75-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ75-E3/52, 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 SMBJ75-E3/52 part is unused and in its original packaging.
Return procedure for SMBJ75-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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