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Vishay General Semiconductor - Diodes Division SMBJ75A-E3/52
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- Part No.:
- SMBJ75A-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ75A-E3/52.pdf
- Description:
- TVS DIODE 75VWM 121VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:1,701
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Product details
Overview
SMBJ75A-E3/52 from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode 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 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 body control modules, and industrial sensor interfaces.
For engineers reviewing the SMBJ75A-E3/52 datasheet, SMBJ75A-E3/52 pinout, SMBJ75A-E3/52 application, or SMBJ75A-E3/52 equivalent, key selection criteria include clamping performance under 5.0 A surge, thermal resistance (RθJA = 100 °C/W), unidirectional polarity marking, RoHS-compliant matte tin plating, and compatibility with automated SMT placement on SMB (DO-214AA) footprint.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VWM = 75 V, it avalanches into low-impedance conduction to divert transient energy away from downstream ICs. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ps), while the unidirectional configuration provides forward conduction path only during positive surges relative to cathode.
The device is rated for repetitive 10/1000 µs transients at 0.01% duty cycle, with derated peak pulse current above TA = 25 °C per Fig. 2. Thermal design must account for RθJL = 20 °C/W (junction-to-lead) and recommended 5.0 mm × 5.0 mm copper pads per terminal to sustain 5.0 W steady-state dissipation at TA = 50 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 75 V - Maximum continuous reverse operating voltage before significant leakage; defines safe DC rail margin for 48 V or 60 V systems. |
| VBR @ IT = 1 mA | 83.3–92.1 V - Breakdown threshold range; ensures reliable triggering without premature conduction during normal operation. |
| VC @ IPPM = 5.0 A | 121 V - Clamped voltage during 10/1000 µs surge; determines maximum stress imposed on protected load. |
| PPPM | 600 W - Peak pulse power handling; supports high-energy transients like ISO 7637-2 Pulse 1/2a/5a in automotive environments. |
| IFSM | 100 A - Non-repetitive 8.3 ms half-sine surge rating; enables survival of inductive switch-off events in relay or solenoid circuits. |
| TJmax | +150 °C - Maximum junction temperature; allows operation in under-hood or enclosed industrial enclosures with limited airflow. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on standard PCB pad layout; informs minimum copper area needed for thermal management. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by band on body; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts avalanche current to ground during overvoltage events. |
| Anode (unbanded end) | Reference node | Typically tied to system ground or lower-potential rail; completes shunt path for surge current. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables protection against high-energy transients such as load dump or inductive kick in 24–48 V systems without external heat sinking. |
| 121 V clamping voltage at 5.0 A | Limits voltage overshoot across protected ICs to safe levels, preserving gate oxide integrity of MOSFETs and input stages of microcontrollers. |
| Unidirectional polarity with cathode band | Prevents forward conduction during normal operation while allowing controlled clamping only on reverse overvoltage events. |
| MSL Level 1 (260 °C peak reflow) | Supports single-pass lead-free reflow assembly without moisture-related popcorn failure or delamination. |
| RoHS-compliant, halogen-free option available | Meets environmental compliance requirements for industrial and automotive electronics sold in EU, China, and North America. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of gate drivers and MCU I/O against voltage spikes induced by brushless motor commutation or relay coil de-energization. IC Role / Device Role / Timing Role: Shunt TVS placed between power rail and ground, triggered within picoseconds to clamp transients before reaching sensitive logic. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V microcontrollers and isolated gate drivers exposed to >100 V spikes. |
Use Scenario: Safeguarding LIN bus transceivers and window lift control ICs from battery line transients during jump-start or alternator load dump. IC Role / Device Role / Timing Role: Unidirectional TVS connected between VBAT and ground, absorbing ISO 7637-2 Pulse 5a (100 V/100 ms) energy. Use Value: Maintains communication integrity and prevents reset or brownout of 5 V domain ICs during harsh automotive electrical events. |
| Industrial Sensor Signal Lines | Telecom Power Supply Inputs |
|
Use Scenario: Shielding analog front-end inputs of pressure/temperature sensors from ESD and nearby relay switching noise. IC Role / Device Role / Timing Role: Low-capacitance TVS (CJ ≈ 100 pF typical at 0 V) placed at connector entry point before signal conditioning stage. Use Value: Limits voltage excursion to <121 V without distorting mV-level sensor signals or introducing measurable offset drift. |
Use Scenario: Front-end surge suppression on 48 V telecom rectifier outputs feeding PoE injectors or base station backplanes. IC Role / Device Role / Timing Role: Primary clamping device in multi-stage protection scheme, handling bulk energy before secondary MOV or GDT. Use Value: Withstands repeated 600 W pulses without parameter shift, ensuring long-term reliability in always-on infrastructure equipment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ75CA-E3/52 | Bidirectional variant; symmetric breakdown in both polarities (VBR = 83.3–92.1 V ± direction); no cathode marking. | Required for AC-coupled or floating signal lines where polarity reversal may occur (e.g., RS-485, CAN bus). | Select SMBJ75CA-E3/52 only if bidirectional clamping is explicitly required; SMBJ75A-E3/52 is preferred for DC rail protection with defined ground reference. |
| SMCJ75A-E3/52 | Same VWM/VBR/VC, but larger SMC (DO-214AB) package; higher PPPM = 1500 W; RθJA = 40 °C/W. | Better suited for higher-energy transients or thermally constrained layouts where SMB footprint is insufficient. | Choose SMCJ75A-E3/52 when surge energy exceeds 600 W capability or board space allows larger footprint for improved thermal margin. |
Compared with SMBJ75A-E3/52, SMBJ75CA-E3/52 adds polarity symmetry at the cost of unnecessary complexity for DC rail use, while SMCJ75A-E3/52 trades compactness for higher power handling and lower thermal resistance - making SMBJ75A-E3/52 optimal for space-constrained 600 W-class protection in automotive and industrial SMT designs.
Availability
SMBJ75A-E3/52 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom power supply inputs requiring stable component supply, RoHS compliance, and AEC-Q101-qualified alternatives upon request.
Supply support for SMBJ75A-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, TVS devices, and optoelectronics with emphasis on reliability, precision, and high-volume manufacturability.
The SMBJ series is engineered for surface-mount transient suppression in demanding environments - targeting automotive, industrial, and telecom applications where consistent clamping, low leakage, and MSL Level 1 reflow compatibility are critical.
FAQ
What is the maximum clamping voltage of SMBJ75A-E3/52 at its rated peak pulse current?
The SMBJ75A-E3/52 has 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 and defines the upper voltage limit imposed on protected circuitry during transient events. The SMBJ75A-E3/52 maintains this clamping performance across its operational temperature range and is validated per ANSI/IEEE C62.35 standards.
Is SMBJ75A-E3/52 suitable for automotive applications requiring AEC-Q101 qualification?
The base part SMBJ75A-E3/52 is RoHS-compliant commercial-grade; however, Vishay offers AEC-Q101-qualified versions under ordering codes SMBJ75AHE3_X (e.g., SMBJ75AHE3_B/H). These variants undergo additional stress testing per AEC-Q101 and are marked with HE3 or HM3 suffixes. For automotive use, specify the HE3 or HM3 version - the SMBJ75A-E3/52 itself is not AEC-Q101 qualified but shares identical electrical and mechanical specs.
How does the SMBJ75A-E3/52 differ from the SMBJ75CA-E3/52?
The SMBJ75A-E3/52 is unidirectional with cathode band marking and conducts only in reverse bias, whereas the SMBJ75CA-E3/52 is bidirectional with symmetric breakdown in both directions and no polarity marking. Both share identical VWM = 75 V, VBR = 83.3–92.1 V, and VC = 121 V ratings. The SMBJ75A-E3/52 is appropriate for DC rail protection; SMBJ75CA-E3/52 is required for AC or polarity-agnostic signal lines like RS-485 or CAN.
What is the thermal resistance and recommended PCB layout for SMBJ75A-E3/52?
The SMBJ75A-E3/52 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. To achieve rated 5.0 W power dissipation at TA = 50 °C, use minimum pad dimensions matching the package outline and ensure adequate copper pour connectivity. The SMBJ75A-E3/52 also exhibits RθJL = 20 °C/W (junction-to-lead), supporting thermal transfer through solder joints to inner-layer planes.
Can SMBJ75A-E3/52 be used in place of SMAJ75A for higher surge robustness?
Yes - the SMBJ75A-E3/52 offers 600 W peak pulse power versus 400 W for SMAJ75A, due to its larger SMB (DO-214AA) package versus SMA (DO-214AC). Both share identical VWM, VBR, and VC ratings, but SMBJ75A-E3/52 delivers 50% higher surge energy handling and lower dynamic impedance. Board redesign is required due to different footprint and thermal pad layout, but the SMBJ75A-E3/52 is a direct functional upgrade for applications needing enhanced transient immunity.
SMBJ75A-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:
- 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-E3/52 FAQ
1.How can I place an order for SMBJ75A-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ75A-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 SMBJ75A-E3/52 reliable?
The price and inventory of SMBJ75A-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 SMBJ75A-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ75A-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ75A-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ75A-E3/52?
SMBJ75A-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ75A-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 SMBJ75A-E3/52?
For technical support, including SMBJ75A-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ75A-E3/52 requirements.
6.How does Aetrix verify that SMBJ75A-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ75A-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 SMBJ75A-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ75A-E3/52?
All SMBJ75A-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ75A-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 SMBJ75A-E3/52 part is unused and in its original packaging.
Return procedure for SMBJ75A-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ75A-E3/52 Tags
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