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Vishay General Semiconductor - Diodes Division SMBJ7.5A/54
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- Part No.:
- SMBJ7.5A/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ7.5A/54.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,994
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Product details
Overview
SMBJ7.5A/54 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 7.5 V stand-off voltage (VWM), 8.33–9.21 V breakdown voltage (VBR) at 1.0 mA test current, 12.9 V maximum clamping voltage (VC) at 46.5 A peak pulse current (IPPM), and 600 W peak pulse power capability with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor signal lines in industrial and telecom equipment.
For engineers reviewing the SMBJ7.5A/54 datasheet, SMBJ7.5A/54 pinout, SMBJ7.5A/54 application, or SMBJ7.5A/54 equivalent, this page delivers verified electrical parameters, thermal behavior, clamping performance under surge conditions, JEDEC-compliant SMB package dimensions, and AEC-Q101-qualified alternatives for automotive-grade designs.
Technical Context
This unidirectional TVS diode operates as a voltage-clamping protection device, conducting only when reverse voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable leakage (<100 µA at VWM) and fast response time (<1 ns), enabling effective suppression of ESD, lightning-induced surges, and inductive switching transients.
The SMBJ7.5A/54 exhibits a 0.067 %/°C temperature coefficient of VBR and a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W. It supports repetitive surge duty cycles up to 0.01 % and meets MSL level 1 per J-STD-020 with 260 °C lead-free reflow peak temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 7.5 V - maximum continuous reverse operating voltage before significant conduction begins |
| VBR (Breakdown Voltage) | 8.33–9.21 V at IT = 1.0 mA - guaranteed conduction onset range for reliable overvoltage triggering |
| VC (Clamping Voltage) | 12.9 V at IPPM = 46.5 A - peak voltage seen by protected circuit during 10/1000 µs surge |
| PPPM (Peak Pulse Power) | 600 W - maximum transient energy absorption capability under standardized 10/1000 µs waveform |
| ID (Reverse Leakage) | ≤100 µA at VWM - low off-state current minimizes standby power loss and avoids false triggering |
| TJ max. | 150 °C - maximum junction temperature rating enabling operation in high-ambient industrial environments |
| Package | SMB (DO-214AA) - industry-standard surface-mount outline with 5.21 mm × 4.06 mm footprint and 2.20 mm height |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference node | Connected to lower-potential side (e.g., ground or return path); defines conduction direction in unidirectional mode |
| Cathode | Clamping output / Surge current sink | Connected to protected line (e.g., VCC or signal); conducts surge current to anode when VAK > VBR |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV line-earth) without derating in standard PCB layouts |
| Low clamping ratio (VC/VWM ≈ 1.72) | Minimizes stress on downstream components - e.g., keeps 7.5 V rail below 13 V during worst-case transients |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and compatibility with standard SMT reflow profiles including lead-free 260 °C peak |
| Glass passivated junction | Ensures long-term parameter stability and low leakage drift across temperature and humidity cycling |
| AEC-Q101 qualification option | Available with HE3/HM3 suffixes for automotive applications requiring validated reliability under temperature cycling and HTRB |
Applications
| Industrial Motor Drives | Telecom Power Supplies |
|---|---|
Use Scenario: Protection of gate drivers and DC-link sensing circuits against inductive kickback from IGBT/MOSFET switching. IC Role / Device Role / Timing Role: Unidirectional clamping diode placed between gate driver output and ground, triggered within <1 ns upon overvoltage. Use Value: Limits gate-source voltage to ≤12.9 V during 46.5 A surge, preventing MOSFET avalanche failure and ensuring system uptime. |
Use Scenario: Input-stage surge suppression on +48 V telecom rectifier outputs feeding backplane distribution. IC Role / Device Role / Timing Role: Primary TVS element shunting transients to chassis ground before they reach DC/DC converters. Use Value: Absorbs 600 W pulses without degradation, maintaining ≤7.5 V nominal rail integrity during lightning-induced surges. |
| Automotive Body Control Modules | Consumer Sensor Interfaces |
Use Scenario: CAN bus line protection in BCMs exposed to load dump and jump-start events. IC Role / Device Role / Timing Role: Standby clamping device on VBAT-supplied microcontroller I/O rails, activated only during overvoltage. Use Value: With AEC-Q101-qualified variants (e.g., SMBJ7.5AHE3), sustains 150 °C junction temperature and passes HTOL testing. |
Use Scenario: ESD protection for analog output lines of temperature/humidity sensors in smart home hubs. IC Role / Device Role / Timing Role: Low-capacitance (typ. 150 pF at 0 V) unidirectional clamp on 3.3 V sensor VDD line. Use Value: Clamps ±8 kV contact ESD (IEC 61000-4-2) while adding <0.1 µA leakage at 3.3 V, preserving ADC accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.5AHE3 | AEC-Q101 qualified; identical VWM, VBR, VC, and PPPM; RoHS-compliant with HE3 suffix | Required for automotive body electronics where qualification traceability and HTOL validation are mandatory | Select SMBJ7.5AHE3 when automotive PPAP documentation, lifetime reliability data, and extended temperature validation are needed. |
| SMBJ7.5CA | Bidirectional variant; same VWM (7.5 V), symmetric VBR (±8.33–9.21 V), identical PPPM and VC | Used where AC-coupled or dual-polarity signal lines (e.g., RS-485, USB D+/D−) require symmetrical clamping | Choose SMBJ7.5CA only if bidirectional protection is required; unidirectional SMBJ7.5A/54 is optimal for DC rails with defined polarity. |
Compared with SMBJ7.5AHE3, the SMBJ7.5A/54 offers commercial-grade cost and availability but lacks automotive qualification evidence; compared with SMBJ7.5CA, it provides superior DC rail protection efficiency due to absence of reverse-conduction path and lower leakage in standby.
Availability
SMBJ7.5A/54 is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, automotive body control modules, and consumer sensor interfaces requiring stable component supply and consistent surge performance across production batches.
Supply support for SMBJ7.5A/54 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 and application-specific performance.
The SMBJ series was developed for high-energy transient suppression in space-constrained SMT designs, targeting industrial, telecom, and automotive systems needing repeatable 600 W surge handling in DO-214AA form factor.
FAQ
What is the maximum clamping voltage of SMBJ7.5A/54 under a 10/1000 µs surge?
The SMBJ7.5A/54 has a maximum clamping voltage (VC) of 12.9 V when subjected to its rated peak pulse current of 46.5 A using the 10/1000 µs waveform. This value is measured per JEDEC standards and guarantees that protected circuitry will not experience voltages exceeding 12.9 V during such transient events. The SMBJ7.5A/54 maintains this clamping performance across its full operating temperature range.
Does SMBJ7.5A/54 meet automotive qualification requirements?
The base SMBJ7.5A/54 is a commercial-grade part and is not AEC-Q101 qualified. However, Vishay offers the functionally identical SMBJ7.5AHE3 variant - which carries the HE3 suffix - explicitly qualified to AEC-Q101 for automotive applications. That version undergoes additional stress testing including temperature cycling, HTRB, and HTGB, and is documented with full PPAP support. SMBJ7.5A/54 itself does not include those qualifications.
What is the reverse leakage current of SMBJ7.5A/54 at its stand-off voltage?
The SMBJ7.5A/54 exhibits a maximum reverse leakage current (ID) of 100 µA when biased at its 7.5 V stand-off voltage (VWM) and tested at 25 °C. This low leakage ensures minimal power loss in always-on applications and avoids interference with precision analog or low-power sensor circuits. The SMBJ7.5A/54 maintains leakage below 500 µA even at 125 °C junction temperature per datasheet derating curves.
Can SMBJ7.5A/54 be used in bidirectional signal protection?
No - SMBJ7.5A/54 is a unidirectional TVS diode, intended for DC rail or single-polarity signal line protection. For bidirectional applications such as RS-485, CAN, or AC-coupled interfaces, the SMBJ7.5CA variant must be used instead. That part provides symmetrical clamping in both directions with identical VBR and VC specifications. Using SMBJ7.5A/54 on bidirectional lines risks forward conduction and potential damage during negative excursions.
What is the thermal resistance of SMBJ7.5A/54, and how does it affect PCB layout?
The SMBJ7.5A/54 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on the minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value means each watt of sustained power dissipation raises junction temperature by ~100 °C above ambient. To ensure safe operation below 150 °C TJ, keep average power below 500 mW in still air - or increase copper area and add thermal vias to reduce RθJA. The SMBJ7.5A/54's RθJL is 20 °C/W, indicating efficient heat transfer to PCB leads.
SMBJ7.5A/54 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Cut Tape (CT)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 7.5V
- Voltage - Breakdown (Min):
- 8.33V
- Voltage - Clamping (Max) @ Ipp:
- 12.9V
- Current - Peak Pulse (10/1000µs):
- 46.5A
- 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)
SMBJ7.5A/54 FAQ
1.How can I place an order for SMBJ7.5A/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ7.5A/54 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 SMBJ7.5A/54 reliable?
The price and inventory of SMBJ7.5A/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ7.5A/54 is usually 5 days.
3.What payment methods are accepted for SMBJ7.5A/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ7.5A/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ7.5A/54?
SMBJ7.5A/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ7.5A/54 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 SMBJ7.5A/54?
For technical support, including SMBJ7.5A/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ7.5A/54 requirements.
6.How does Aetrix verify that SMBJ7.5A/54 is sourced from the original manufacturer or authorized distributors?
All SMBJ7.5A/54 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 SMBJ7.5A/54 meets industry standards.
7.What is the process for return or replacement of SMBJ7.5A/54?
All SMBJ7.5A/54 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ7.5A/54, 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 SMBJ7.5A/54 part is unused and in its original packaging.
Return procedure for SMBJ7.5A/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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