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Vishay General Semiconductor - Diodes Division SMBJ7.5A-M3/52
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- Part No.:
- SMBJ7.5A-M3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ7.5A-M3/52.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,745
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Product details
Overview
SMBJ7.5A-M3/52 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 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 protect MOSFETs, ICs, and sensor interfaces in industrial power supplies.
For engineers reviewing the SMBJ7.5A-M3/52 datasheet, SMBJ7.5A-M3/52 pinout, SMBJ7.5A-M3/52 application, or SMBJ7.5A-M3/52 equivalent, key selection criteria include unidirectional polarity, 12.9 V clamping performance at 46.5 A, 100 °C/W junction-to-ambient thermal resistance, halogen-free RoHS-compliant construction (M3 suffix), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a voltage-clamping protection device in series with sensitive downstream circuitry, 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), while low incremental surge resistance enables effective energy diversion during ESD or inductive switching events.
The SMBJ7.5A-M3/52 is rated for repetitive 10/1000 µs surges at 0.01% duty cycle and supports operating junction temperatures from –55 °C to +150 °C. Its cathode-band marking identifies polarity, and it meets MSL Level 1 per J-STD-020 with 260 °C reflow peak temperature tolerance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - Maximum continuous reverse working voltage before conduction begins; sets upper limit for safe operation in protected circuit. |
| VBR min/max | 8.33 V / 9.21 V at 1.0 mA - Confirmed breakdown range defining turn-on threshold under standardized test conditions. |
| VC @ IPPM | 12.9 V at 46.5 A - Clamped voltage during 600 W transient event; determines maximum stress imposed on protected IC or MOSFET. |
| PPPM | 600 W - Peak pulse power handling capability with 10/1000 µs waveform; defines transient energy absorption capacity. |
| IPPM | 46.5 A - Peak pulse current corresponding to 600 W clamping condition; used to size PCB trace routing and pad thermal mass. |
| TJ max | +150 °C - Maximum junction temperature; constrains ambient operating limits and heatsinking requirements in high-power applications. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; critical for thermal derating above 25 °C ambient. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant (M3 suffix), matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Polarity indicated by cathode band on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference | Connected to lower-potential side of protected line (e.g., ground or return path); defines directionality of clamping action. |
| Cathode | Clamping output / Surge current sink | Connected to higher-potential side (e.g., VIN, signal line); conducts transient current to anode during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Enables robust protection against IEC 61000-4-5 Level 3 (1 kV/2 Ω) surges without degradation under repetitive duty cycles. |
| 12.9 V clamping voltage at 46.5 A | Ensures protected 5 V or 3.3 V logic circuits remain below absolute maximum ratings during worst-case transients. |
| Glass passivated junction | Delivers stable leakage (<100 µA at 7.5 V), consistent VBR, and long-term reliability in humid or thermally cycled environments. |
| MSL Level 1 moisture sensitivity | Allows direct use from reel without baking; compatible with standard lead-free reflow profiles up to 260 °C peak. |
| Halogen-free & RoHS-compliant (M3) | Fulfills environmental compliance requirements for industrial and automotive-tier supply chains without sacrificing electrical performance. |
Applications
| Industrial Power Input Protection | Automotive Sensor Signal Line Protection |
|---|---|
|
Use Scenario: 24 V DC input rail in programmable logic controllers exposed to load dump and relay coil flyback. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VIN and GND to clamp positive-going transients before they reach DC-DC converter ICs. Use Value: Limits voltage excursion to ≤12.9 V during 46.5 A surges, preventing latch-up or gate oxide damage in downstream buck controllers. |
Use Scenario: LIN bus or analog sensor output (e.g., pressure, temperature) in engine control modules subject to ISO 7637-2 pulse 1 and pulse 2a. IC Role / Device Role / Timing Role: TVS connected across signal and ground to absorb negative transients induced by inductive coupling or battery disconnection. Use Value: Maintains signal integrity by clamping to <13 V while adding <10 pF capacitance - negligible impact on 20 kHz LIN timing budgets. |
| Consumer Device USB Port ESD Protection | Telecom Equipment DC Bias Rail Protection |
|
Use Scenario: 5 V USB VBUS line in set-top boxes or smart displays vulnerable to human-body-model (HBM) ESD events. IC Role / Device Role / Timing Role: Standoff-rated TVS placed upstream of USB power switch IC to shunt >8 kV HBM strikes before reaching load switches or PMICs. Use Value: Responds in <1 ns to divert >30 A ESD current, limiting voltage seen by protected IC to ≤12.9 V without affecting steady-state 5 V regulation. |
Use Scenario: 48 V phantom power rail in VoIP phones or PoE-powered access points subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Primary-stage TVS on DC input before DC-DC isolation stage to absorb bulk surge energy prior to transformer coupling. Use Value: Absorbs 600 W transient energy with minimal voltage overshoot, reducing stress on downstream optocouplers and isolated feedback circuits. |
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-E3/52 | Same electrical specs; RoHS-compliant but not halogen-free (E3 vs. M3). | Acceptable where halogen-free requirement is not mandated (e.g., non-automotive commercial designs). | Select E3 for cost-sensitive, non-automotive applications where halogen content is unrestricted. |
| SMBJ7.5CA-M3/52 | Bidirectional variant; symmetric VBR = 8.33–9.21 V, no polarity marking, same VC = 12.9 V. | Required for AC-coupled or bidirectional signal lines (e.g., RS-485, CAN FD) where polarity reversal occurs. | Choose CA version only when protecting balanced differential pairs or AC signals needing symmetrical clamping. |
Compared with SMBJ7.5A-E3/52, the M3 variant adds halogen-free compliance without altering clamping behavior; compared with SMBJ7.5CA-M3/52, the unidirectional SMBJ7.5A-M3/52 provides lower leakage and avoids unnecessary bidirectional conduction in DC-biased rails.
Availability
SMBJ7.5A-M3/52 is available at Aetrix Electronics and suitable for industrial power input protection, automotive sensor interface hardening, consumer USB port ESD mitigation, and telecom DC bias rail surge suppression requiring stable component supply and full traceability.
Supply support for SMBJ7.5A-M3/52 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, automotive electronics, and communications infrastructure where robustness and repeatable clamping performance are critical.
FAQ
What is the maximum clamping voltage of SMBJ7.5A-M3/52 under a 600 W transient?
The SMBJ7.5A-M3/52 has a maximum clamping voltage (VC) of 12.9 V when subjected to its rated 600 W peak pulse power with a 10/1000 µs waveform. This value is measured at 46.5 A peak pulse current and represents the highest voltage that will appear across the SMBJ7.5A-M3/52 during such an event - directly determining the stress level imposed on downstream components like microcontrollers or power switches.
Is SMBJ7.5A-M3/52 suitable for automotive applications?
The SMBJ7.5A-M3/52 itself is not AEC-Q101 qualified; it carries the M3 suffix indicating halogen-free RoHS compliance for commercial-grade use. For automotive applications requiring qualification, Vishay offers the SMBJ7.5A-HM3_X variant (e.g., SMBJ7.5A-HM3_A). Engineers must specify the HM3_X part number explicitly to obtain AEC-Q101 validation for the SMBJ7.5A-M3/52's electrical characteristics and reliability testing.
How does the SMBJ7.5A-M3/52 differ from the SMBJ7.5CA-M3/52?
The SMBJ7.5A-M3/52 is unidirectional with cathode-band polarity marking and specified for DC-biased protection, whereas the SMBJ7.5CA-M3/52 is bidirectional with identical VBR and VC values but no polarity marking. The unidirectional SMBJ7.5A-M3/52 exhibits lower reverse leakage (<100 µA at 7.5 V) versus the bidirectional version, making it preferable for single-polarity rails where leakage current affects system quiescent power.
What PCB layout guidance applies to SMBJ7.5A-M3/52 for optimal thermal performance?
To maintain rated 600 W pulse capability, the SMBJ7.5A-M3/52 must be mounted on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in Vishay's datasheet. Smaller pads increase thermal resistance beyond the rated 100 °C/W RθJA, causing premature thermal runaway during repetitive surges - especially critical in enclosed industrial enclosures operating above 50 °C ambient.
Does SMBJ7.5A-M3/52 meet moisture sensitivity level (MSL) requirements for lead-free reflow?
Yes, the SMBJ7.5A-M3/52 meets MSL Level 1 per J-STD-020, meaning it can be stored indefinitely at ambient conditions and processed through standard lead-free reflow profiles with a maximum peak temperature of 260 °C without preconditioning or baking. This eliminates moisture-related popcorning risk and simplifies SMT line integration for high-volume manufacturing of the SMBJ7.5A-M3/52.
SMBJ7.5A-M3/52 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):
- 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-M3/52 FAQ
1.How can I place an order for SMBJ7.5A-M3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ7.5A-M3/52 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 SMBJ7.5A-M3/52 reliable?
The price and inventory of SMBJ7.5A-M3/52 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-M3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ7.5A-M3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ7.5A-M3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ7.5A-M3/52?
SMBJ7.5A-M3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ7.5A-M3/52 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 SMBJ7.5A-M3/52?
For technical support, including SMBJ7.5A-M3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ7.5A-M3/52 requirements.
6.How does Aetrix verify that SMBJ7.5A-M3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ7.5A-M3/52 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 SMBJ7.5A-M3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ7.5A-M3/52?
All SMBJ7.5A-M3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ7.5A-M3/52, 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 SMBJ7.5A-M3/52 part is unused and in its original packaging.
Return procedure for SMBJ7.5A-M3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ7.5A-M3/52 Tags
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