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Vishay General Semiconductor - Diodes Division SMBG7.5A/54
- Part No.:
- SMBG7.5A/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG7.5A/54.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,135
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Product details
Overview
SMBG7.5A/54 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for primary overvoltage protection of DC power rails 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, and 600 W peak pulse power rating with 10/1000 μs waveform - used to safeguard MOSFETs, ICs, and sensor interfaces against ESD and inductive switching transients.
For engineers reviewing the SMBG7.5A/54 datasheet, SMBG7.5A/54 pinout, SMBG7.5A/54 application, or SMBG7.5A/54 equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), polarity marking (cathode band), and bidirectional alternative options - all critical for automotive-grade board-level surge protection design and BOM validation.
Technical Context
The SMBG7.5A/54 operates as a silicon avalanche diode that enters controlled breakdown above its VWM threshold, clamping transient voltages within nanoseconds. Its glass-passivated junction ensures stable leakage (<1.0 μA at 7.5 V) and repeatable VBR tolerance (±5% typical), while the low incremental surge resistance enables effective energy diversion during 8.3 ms half-sine surges up to 100 A (IFSM).
Designed for surface-mount automated placement on 0.2" × 0.2" copper pads, it meets J-STD-020 MSL Level 1 (260 °C peak reflow) and is qualified to AEC-Q101 for automotive under-hood and infotainment systems. Its DO-215AA outline provides mechanical robustness and thermal performance (TJmax = 150 °C) without requiring heatsinking in typical 12 V rail applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - Maximum continuous reverse operating voltage before clamping begins; sets minimum system operating margin for 12 V nominal rails. |
| VBR @ IT = 1.0 mA | 8.33–9.21 V - Breakdown onset range; defines turn-on consistency across production lots for predictable clamping behavior. |
| VC @ IPPM = 46.5 A | 12.9 V - Clamped voltage during 600 W transient; limits downstream device stress to safe levels during ISO 7637-2 Pulse 1/2a events. |
| PPPM | 600 W - Peak pulse power handling with 10/1000 μs waveform; supports repetitive surge duty cycle ≤ 0.01 % without degradation. |
| IFSM | 100 A - Non-repetitive forward surge rating (8.3 ms half-sine); validates robustness against load dump in automotive 12 V systems. |
| TJmax | 150 °C - Maximum junction temperature; enables operation in under-hood environments with minimal derating at +105 °C ambient. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on standard pad layout; informs thermal design margin for sustained surge repetition. |
Pinout & Package
Package: SMBG (DO-215AA) - surface-mount, low-profile gull-wing leaded package with matte tin-plated terminals, UL 94 V-0 molding compound, and cathode band marking for unidirectional polarity identification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to ground or lower-potential node in unidirectional configuration; carries surge current during clamping. |
| Cathode (banded end) | Reverse-biased terminal | Connected to protected line (e.g., 12 V rail); initiates avalanche breakdown when voltage exceeds VWM. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and body electronics, ensuring reliability under temperature cycling and humidity stress. |
| Glass passivated junction | Provides stable VBR tolerance and low leakage (<1.0 μA) over lifetime, critical for long-term protection integrity in industrial sensors. |
| 600 W peak pulse power (10/1000 μs) | Handles high-energy transients such as relay coil flyback or alternator load dump without failure or parameter shift. |
| MSL Level 1 moisture sensitivity | Enables standard SMT reflow without baking, reducing manufacturing cost and process complexity for high-volume PCB assembly. |
| Low clamping ratio (VC/VWM ≈ 1.72) | Minimizes overvoltage exposure to protected ICs - e.g., keeps microcontroller I/O pins below absolute maximum ratings during surge events. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V supply inputs of engine control modules (ECMs) against ISO 7637-2 Pulse 1 (inductive switch-off) and Pulse 2a (load dump). IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and local regulator input to clamp transients before they reach LDOs or microcontrollers. Use Value: Limits clamped voltage to 12.9 V, preventing damage to 16 V-rated input stages and maintaining system uptime during harsh vehicle electrical events. | Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loop drivers) in factory automation PLC I/O modules from field-wiring ESD and cable coupling noise. IC Role / Device Role / Timing Role: TVS mounted at connector entry point to shunt fast transients (<1 ns rise time) before reaching precision DAC or op-amp circuitry. Use Value: Sub-13 V clamping ensures downstream amplifier common-mode range remains intact, preserving measurement accuracy and avoiding latch-up. |
| Consumer USB Port ESD Protection | Telecom DC Feeder Line Surge Suppression |
Use Scenario: Secondary-level protection on VBUS line of USB 2.0 host ports in set-top boxes and smart displays exposed to user-handling ESD per IEC 61000-4-2 ±8 kV contact discharge. IC Role / Device Role / Timing Role: Standoff-rated TVS placed upstream of polyfuse and USB switch IC to absorb ESD energy without triggering overcurrent shutdown. Use Value: 7.5 V VWM allows full 5 V USB operation while clamping ESD pulses to <13 V, protecting 5.5 V tolerant USB transceivers. | Use Scenario: Overvoltage suppression on -48 V DC feeder lines powering remote radio units (RRUs) in 4G/5G base stations subject to lightning-induced surges. IC Role / Device Role / Timing Role: Unidirectional TVS connected between -48 V rail and chassis ground to clamp positive-going transients induced on telecom infrastructure cabling. Use Value: Withstands 100 A surge (IFSM) and maintains clamping below -35 V, preserving isolation integrity of DC/DC converters and preventing cascading failures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.5A | Same VWM (7.5 V) and VC (12.9 V), but rated for 600 W in SMB (DO-214AA) package - slightly larger footprint and higher RθJA (110 °C/W). | Preferred where existing layout uses SMB footprint or where higher surge margin is needed via larger copper area. | Select SMBJ7.5A only if board space permits larger package and thermal budget allows higher junction rise. |
| SMBG7.5CA | Bidirectional variant with identical VWM (7.5 V), VBR, and VC, but symmetrical clamping for AC-coupled or floating signal lines. | Required for differential bus protection (e.g., RS-485, CAN) where polarity reversal occurs during normal operation. | Choose SMBG7.5CA when protecting bidirectional data lines; SMBG7.5A/54 is optimal for DC power rails with defined polarity. |
Compared with SMBJ7.5A and SMBG7.5CA, the SMBG7.5A/54 offers the smallest footprint (DO-215AA), lowest profile, and AEC-Q101 qualification out-of-box - making it the preferred choice for space-constrained automotive and industrial PCBs where unidirectional DC rail protection is required.
Availability
SMBG7.5A/54 is available at Aetrix Electronics and suitable for automotive power management, industrial sensor interface design, and telecom DC feeder protection requiring stable component supply and AEC-Q101 compliance.
Supply support for SMBG7.5A/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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and automotive-grade qualification.
The SMBG series was developed specifically for high-reliability surface-mount transient suppression in automotive, industrial, and telecom infrastructure - balancing compact size, high surge capability, and AEC-Q101 validation.
FAQ
What is the maximum clamping voltage of the SMBG7.5A/54 under specified surge conditions?
The SMBG7.5A/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 ANSI/IEEE C62.35 standards and ensures downstream components see limited overvoltage during transient events. The SMBG7.5A/54 maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C).
Is the SMBG7.5A/54 suitable for automotive applications?
Yes, the SMBG7.5A/54 is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood and infotainment systems. Its construction - glass-passivated junction, MSL Level 1 reflow compatibility, and 150 °C maximum junction temperature - meets stringent automotive reliability requirements. The SMBG7.5A/54 is commonly deployed in engine control units, body control modules, and ADAS sensor power supplies.
How does the SMBG7.5A/54 differ from the SMBG7.5CA variant?
The SMBG7.5A/54 is unidirectional with cathode-band polarity marking, intended for DC rail protection where voltage polarity is fixed. In contrast, SMBG7.5CA is bidirectional, offering symmetrical clamping for AC or floating signals like RS-485 or CAN bus lines. Both share identical VWM, VBR, and VC specs, but the SMBG7.5A/54 cannot replace SMBG7.5CA in bidirectional applications without circuit redesign.
What is the thermal resistance of the SMBG7.5A/54, and how does it affect layout?
The SMBG7.5A/54 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" copper pads per terminal. This value assumes the recommended DO-215AA pad layout; reducing pad area increases thermal resistance and may require derating peak power during repetitive surges. Layout must follow Vishay's mounting pad dimensions to maintain rated 600 W pulse capability.
Does the SMBG7.5A/54 meet RoHS and halogen-free requirements?
Yes, the SMBG7.5A/54 is RoHS compliant and available in both standard (E3 suffix) and halogen-free (M3 suffix) versions. The "/54" in the part number indicates packaging in 13" tape-and-reel (3200 pcs), and both variants meet JESD201 Class 2 whisker resistance and UL 94 V-0 flammability standards. Material declarations are accessible via Vishay's compliance portal.
SMBG7.5A/54 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-215AA, SMB Gull Wing
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- 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 (SMBG)
SMBG7.5A/54 FAQ
1.How can I place an order for SMBG7.5A/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG7.5A/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 SMBG7.5A/54 reliable?
The price and inventory of SMBG7.5A/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG7.5A/54 is usually 5 days.
3.What payment methods are accepted for SMBG7.5A/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG7.5A/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG7.5A/54?
SMBG7.5A/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG7.5A/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 SMBG7.5A/54?
For technical support, including SMBG7.5A/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG7.5A/54 requirements.
6.How does Aetrix verify that SMBG7.5A/54 is sourced from the original manufacturer or authorized distributors?
All SMBG7.5A/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 SMBG7.5A/54 meets industry standards.
7.What is the process for return or replacement of SMBG7.5A/54?
All SMBG7.5A/54 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG7.5A/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 SMBG7.5A/54 part is unused and in its original packaging.
Return procedure for SMBG7.5A/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG7.5A/54 Tags
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