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Vishay General Semiconductor - Diodes Division SMBJ7.5CA/54
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- Part No.:
- SMBJ7.5CA/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ7.5CA/54.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,293
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Product details
Overview
SMBJ7.5CA/54 from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal or power lines. It features 7.5 V stand-off voltage (VWM), 8.33–9.21 V breakdown voltage (VBR) at 1 mA, 12.9 V maximum clamping voltage (VC) at 46.5 A peak pulse current (IPPM), and 600 W peak pulse power (PPPM) with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor signal lines in industrial and telecom equipment.
For engineers reviewing the SMBJ7.5CA/54 datasheet, SMBJ7.5CA/54 pinout, SMBJ7.5CA/54 application, or SMBJ7.5CA/54 equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VBR ≈ 1.55), MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical VBR min/max (8.33 V / 9.21 V), ID ≤ 100 µA at VWM = 7.5 V, and thermal resistance RθJA = 100 °C/W. Its glass-passivated junction enables fast response (<1 ns) and stable surge performance under repetitive 0.01% duty cycle conditions.
The device meets UL 497B recognition (QVGQ2) and is rated for TJ = –55 °C to +150 °C operation. It is not AEC-Q101 qualified unless ordered with HE3/HM3 suffix - SMBJ7.5CA/54 uses standard commercial-grade E3/M3 marking per ordering code convention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - maximum continuous reverse operating voltage before clamping begins; ensures no conduction during normal signal/power operation. |
| VBR (min/max) | 8.33 V / 9.21 V at IT = 1 mA - defines reliable breakdown onset window; tight tolerance supports predictable protection threshold. |
| VC @ IPPM | 12.9 V at 46.5 A - clamping voltage under 10/1000 µs surge; limits downstream voltage stress to safe levels for 3.3 V/5 V logic. |
| PPPM | 600 W - peak transient energy handling capacity; sufficient for IEC 61000-4-5 Level 3 (1 kV/2 Ω) surges. |
| ID @ VWM | ≤ 100 µA - low leakage preserves signal integrity and minimizes standby power loss in high-impedance circuits. |
| Package | SMB (DO-214AA) - industry-standard surface-mount outline with 5.59 mm max length, compatible with JEDEC MS-012AC footprint. |
| TJ max | +150 °C - enables use in under-hood automotive modules or enclosed industrial enclosures without derating. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, MSL Level 1 (peak reflow 260 °C). No polarity marking on bidirectional variants - terminals are symmetrical.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (bidirectional) | Surge current path | Both terminals function identically as clamping nodes; no cathode band marking - enables layout symmetry and eliminates orientation errors during placement. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential signal lines (e.g., RS-485, CAN, USB D+/D−) without polarity concerns. |
| 600 W peak pulse power | Handles IEC 61000-4-5 combination wave surges up to 1 kV open-circuit / 0.5 kA short-circuit without degradation. |
| Low clamping ratio (VC/VBR ≈ 1.55) | Minimizes overvoltage exposure to protected ICs - critical for safeguarding 3.3 V microcontrollers and analog front-ends. |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow profile usage (J-STD-020), eliminating bake requirements and streamlining manufacturing. |
| Glass passivated junction | Ensures stable VBR over temperature and lifetime, with <1 ns response time to suppress fast ESD (IEC 61000-4-2) and EFT events. |
Applications
| Industrial Motor Control | Automotive Body Electronics |
|---|---|
|
Use Scenario: Protecting gate drivers and feedback sensing lines in BLDC motor inverters exposed to inductive switching spikes. IC Role / Device Role / Timing Role: Bidirectional TVS clamps both positive and negative transients induced by MOSFET turn-off, preventing latch-up or gate oxide damage. Use Value: With VC = 12.9 V, it keeps gate-source voltage within safe margin for 12 V-rated SiC MOSFETs while surviving 600 W pulses. |
Use Scenario: Shielding LIN bus transceivers and door module MCUs from load dump and jump-start surges. IC Role / Device Role / Timing Role: Acts as first-line transient shunt on power input and data lines, diverting >95% of surge energy away from sensitive silicon. Use Value: Low ID (≤100 µA) avoids loading the 12 V supply rail; SMB package fits compact PCB space near connector entry points. |
| Telecom Power Supply Input | Consumer Sensor Interface |
|
Use Scenario: Safeguarding DC-DC converter inputs in PoE-powered network switches against lightning-induced surges on Ethernet cables. IC Role / Device Role / Timing Role: Clamps common-mode transients between VBUS and GND before they reach primary-side controller ICs. Use Value: 600 W PPPM rating exceeds IEC 61000-4-5 Level 4 (4 kV/2 Ω) requirement when used with series impedance matching. |
Use Scenario: Protecting I²C lines of environmental sensors (temperature/humidity) in smart home hubs from ESD during user handling. IC Role / Device Role / Timing Role: Suppresses ±8 kV contact ESD per IEC 61000-4-2 without distorting low-speed digital signals. Use Value: Sub-13 V clamping ensures sensor ICs with 3.6 V absolute max ratings remain undamaged during transient events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.5CA-E3/52 | Same electrical specs and SMB package; differs only in packaging format (7" tape/reel, 750 pcs) and RoHS-compliant E3 suffix. | No functional difference - suitable for same PCB layouts and protection schemes. | Select SMBJ7.5CA-E3/52 for standard commercial production runs requiring JEDEC-compliant tape-and-reel delivery. |
| P6SMB7.5CA | Identical VWM (7.5 V), VBR (8.33–9.21 V), VC (12.9 V), and PPPM (600 W); same SMB package but manufactured by Littelfuse. | Validated in same automotive and industrial reference designs; UL 497B recognized with file E136766. | Choose P6SMB7.5CA when dual-sourcing is required or when Littelfuse's supply chain alignment better matches program timelines. |
Compared with SMBJ7.5CA/54, SMBJ7.5CA-E3/52 offers identical protection performance in a different reel configuration, while P6SMB7.5CA provides second-source assurance with full parameter and qualification equivalence - both avoid layout changes and support drop-in replacement in existing designs.
Availability
SMBJ7.5CA/54 is available at Aetrix Electronics and suitable for industrial motor control, telecom power input protection, automotive body electronics, and consumer sensor interface applications requiring stable component supply and consistent surge immunity performance.
Supply support for SMBJ7.5CA/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, power efficiency, and AEC-Q101 qualification.
The SMBJ series targets robust transient suppression in harsh environments - engineered for high-energy surge handling, low clamping voltage, and seamless integration into automated SMT assembly lines.
FAQ
What is the clamping voltage of SMBJ7.5CA/54 under a 10/1000 µs surge?
The SMBJ7.5CA/54 has a maximum clamping voltage (VC) of 12.9 V at 46.5 A peak pulse current (IPPM) under a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that downstream circuitry sees no more than 12.9 V during standardized surge events - critical for protecting 3.3 V or 5 V logic interfaces. The SMBJ7.5CA/54 achieves this with a low clamping ratio of approximately 1.55 relative to its VBR midpoint.
Is SMBJ7.5CA/54 bidirectional or unidirectional?
SMBJ7.5CA/54 is a bidirectional Transient Voltage Suppressor, indicated by the "CA" suffix per Vishay's naming convention. It provides symmetrical clamping for both positive and negative transients, with identical VBR (8.33–9.21 V), VC (12.9 V), and IPPM (46.5 A) characteristics in either polarity. Unlike unidirectional variants (e.g., SMBJ7.5A), SMBJ7.5CA/54 has no cathode band marking and is ideal for AC signal lines or differential buses where polarity reversal occurs.
Does SMBJ7.5CA/54 meet automotive qualification standards?
SMBJ7.5CA/54 is not AEC-Q101 qualified in its base configuration; it carries commercial-grade E3/M3 marking. However, Vishay offers AEC-Q101-qualified versions under ordering codes such as SMBJ7.5CAHE3_B/H (with HE3 suffix). For automotive body electronics applications requiring qualification, users must specify the HE3 or HM3 variant - SMBJ7.5CA/54 itself is intended for industrial, telecom, and consumer systems where extended temperature range (–55 °C to +150 °C) suffices without formal automotive certification.
What is the maximum leakage current of SMBJ7.5CA/54 at its stand-off voltage?
The SMBJ7.5CA/54 exhibits a maximum reverse leakage current (ID) of 100 µA at its stand-off voltage (VWM) of 7.5 V, tested at TA = 25 °C. This low leakage ensures minimal impact on high-impedance sensor bias networks or battery-powered circuits, preserving signal fidelity and extending operational battery life. The SMBJ7.5CA/54 maintains this specification across its full operating temperature range, supporting reliable performance in ambient conditions up to +125 °C.
Can SMBJ7.5CA/54 be used in place of SMBJ7.5A in a design?
SMBJ7.5CA/54 cannot directly replace SMBJ7.5A without circuit review, because SMBJ7.5A is unidirectional (cathode-marked, conducts forward at ~0.7 V) while SMBJ7.5CA/54 is bidirectional (no polarity, blocks in both directions until VBR is exceeded). Substituting SMBJ7.5CA/54 for SMBJ7.5A on a DC power rail may cause unintended conduction if forward voltage exceeds 0.7 V. The SMBJ7.5CA/54 is appropriate only where symmetrical clamping is required - e.g., data lines, AC inputs, or floating grounds.
SMBJ7.5CA/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:
- -
- Bidirectional Channels:
- 1
- 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)
SMBJ7.5CA/54 FAQ
1.How can I place an order for SMBJ7.5CA/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ7.5CA/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 SMBJ7.5CA/54 reliable?
The price and inventory of SMBJ7.5CA/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ7.5CA/54 is usually 5 days.
3.What payment methods are accepted for SMBJ7.5CA/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ7.5CA/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ7.5CA/54?
SMBJ7.5CA/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ7.5CA/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 SMBJ7.5CA/54?
For technical support, including SMBJ7.5CA/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ7.5CA/54 requirements.
6.How does Aetrix verify that SMBJ7.5CA/54 is sourced from the original manufacturer or authorized distributors?
All SMBJ7.5CA/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 SMBJ7.5CA/54 meets industry standards.
7.What is the process for return or replacement of SMBJ7.5CA/54?
All SMBJ7.5CA/54 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ7.5CA/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 SMBJ7.5CA/54 part is unused and in its original packaging.
Return procedure for SMBJ7.5CA/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ7.5CA/54 Tags
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