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Vishay General Semiconductor - Diodes Division SMBJ9.0A-M3/52
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- Part No.:
- SMBJ9.0A-M3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ9.0A-M3/52.pdf
- Description:
- TVS DIODE 9VWM 15.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMBJ9.0A-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 9.0 V stand-off voltage (VWM), 10.0–11.1 V breakdown voltage (VBR) at 1.0 mA, 15.4 V maximum clamping voltage (VC) at 39.0 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 and telecom systems.
For engineers reviewing the SMBJ9.0A-M3/52 datasheet, SMBJ9.0A-M3/52 pinout, SMBJ9.0A-M3/52 application, or SMBJ9.0A-M3/52 equivalent, this page delivers verified electrical parameters, thermal derating behavior, polarity marking convention, halogen-free RoHS compliance status, and direct alternative part comparisons for ESD and surge protection design validation.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, conducting only when reverse voltage exceeds VBR; forward conduction is limited to 3.5 V max at 50 A. Its low incremental surge resistance ensures minimal voltage overshoot during fast transients, while its 100 °C/W junction-to-ambient thermal resistance requires careful PCB copper pad sizing per Vishay's 0.2" × 0.2" (5.0 mm × 5.0 mm) recommendation.
The device meets MSL Level 1 per J-STD-020, supports 260 °C lead-free reflow, and uses glass-passivated junction construction for stable leakage performance. Polarity is marked by a cathode band; no marking applies to bidirectional variants. It is not AEC-Q101 qualified - the M3 suffix denotes halogen-free RoHS compliance only, not automotive qualification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 9.0 V - maximum continuous reverse operating voltage before significant leakage; sets minimum system rail margin for reliable clamping activation |
| VBR (min/max) | 10.0 V / 11.1 V at 1.0 mA - defines guaranteed avalanche onset range; ensures consistent turn-on across temperature and unit variation |
| VC @ IPPM | 15.4 V at 39.0 A - clamped voltage seen by protected circuit during 600 W transient; determines downstream component overvoltage stress |
| PPPM | 600 W - peak pulse power handling with 10/1000 µs waveform; defines single-event surge energy absorption capability |
| IPPM | 39.0 A - peak pulse current corresponding to VC; used to size series impedance and verify layout current-carrying capacity |
| RθJA | 100 °C/W - junction-to-ambient thermal resistance; mandates minimum copper pad area (0.2" × 0.2") for safe 5.0 W steady-state dissipation |
| Leakage ID | 10 µA max at VWM - reverse leakage at stand-off voltage; critical for low-power sensor or battery-backed circuits |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads. Cathode indicated by a single band on the case body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference node | Connected to lower-potential side of protected line (e.g., GND or return path); defines polarity-sensitive placement |
| Cathode | Avalanche conduction terminal / Clamping output node | Connected to higher-potential side (e.g., VCC, signal line); carries full transient current during clamping event |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 Level 3 surges (1 kV/2 Ω) without external series impedance redesign |
| 15.4 V clamping voltage at 39 A | Limits voltage excursion on 12 V automotive or industrial control rails to within safe operating range of 16 V-rated ICs |
| Low 10 µA max reverse leakage at 9.0 V | Preserves battery life and avoids false triggering in always-on sensor nodes powered from 9 V sources |
| MSL Level 1, 260 °C reflow compatible | Supports standard lead-free SMT assembly without moisture sensitivity concerns or baking requirements |
| Glass-passivated junction | Ensures stable VBR and leakage performance across 1000+ thermal cycles and 150 °C max junction temperature |
Applications
| Industrial Motor Control | Automotive Body Control Module (BCM) |
|---|---|
|
Use Scenario: Protection of gate drivers and microcontroller I/O pins against inductive kickback from relay coils and solenoid loads. IC Role / Device Role / Timing Role: Unidirectional TVS placed between MCU GPIO and load switch output to clamp negative transients below -0.7 V and positive spikes above 15.4 V. Use Value: Prevents latch-up and permanent damage to 3.3 V/5 V logic inputs during 100 V/50 A switching events, extending field reliability beyond 100,000 cycles. |
Use Scenario: Surge suppression on LIN bus lines and power supply inputs in door module ECUs exposed to load dump and jump-start conditions. IC Role / Device Role / Timing Role: Standoff-clamp TVS connected from LIN line to chassis ground, activated only during >10 V transients to preserve signal integrity at 19.2 kbps. Use Value: Maintains <1 µs response time and holds bus voltage ≤15.4 V during ISO 7637-2 Pulse 1/2a events, avoiding communication timeout or reset. |
| Telecom Power Supply Input | Consumer Sensor Hub Interface |
|
Use Scenario: Input-stage protection for 12 V DC-DC converters feeding base station RF modules subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Primary clamping device placed after input fuse and before bulk capacitor, absorbing 600 W pulses without thermal runaway. Use Value: Limits input rail overshoot to 15.4 V during 10/1000 µs transients, preventing overvoltage shutdown of downstream PMICs and enabling Class B EMC compliance. |
Use Scenario: ESD and fast transient protection for I²C lines connecting ambient light and proximity sensors to application processors in smart displays. IC Role / Device Role / Timing Role: Low-leakage (≤10 µA) unidirectional TVS tied between SDA/SCL and GND, with cathode to signal line to avoid forward conduction. Use Value: Passes IEC 61000-4-2 ±8 kV contact discharge without signal distortion or bus lockup, preserving 400 kHz timing margins. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ9.0A-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-EU commercial equipment) | Select when cost priority outweighs halogen-free compliance; identical footprint and solder profile |
| SMBJ9.0CA-M3/52 | Bidirectional variant; symmetric VBR = 10.0–11.1 V; double leakage (20 µA max) at same VWM | Required for AC-coupled or bipolar signal lines (e.g., RS-485, CAN) where polarity reversal occurs | Choose only if bidirectional clamping is needed; otherwise, unidirectional SMBJ9.0A-M3/52 offers lower leakage and tighter VC |
Compared with SMBJ9.0A-E3/52, the M3 version adds halogen-free compliance without performance trade-offs; versus SMBJ9.0CA-M3/52, the unidirectional SMBJ9.0A-M3/52 provides 50 % lower leakage and optimized clamping for DC rails - making it preferable for power-supply and single-polarity signal protection.
Availability
SMBJ9.0A-M3/52 is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, telecom power input stages, and consumer sensor interface designs requiring stable component supply, halogen-free compliance, and repeatable surge immunity performance.
Supply support for SMBJ9.0A-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 high-reliability, high-efficiency, and automotive-grade solutions.
The SMBJ series targets board-level transient protection in space-constrained applications, delivering standardized 600 W surge capability in the compact SMB package for cost-sensitive yet robust industrial and consumer designs.
FAQ
What is the maximum clamping voltage of SMBJ9.0A-M3/52 under rated surge conditions?
The SMBJ9.0A-M3/52 has a maximum clamping voltage (VC) of 15.4 V at 39.0 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and represents the upper voltage limit imposed on the protected circuit during worst-case transient events. The SMBJ9.0A-M3/52 maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C) when mounted per Vishay's recommended pad layout.
Is SMBJ9.0A-M3/52 suitable for automotive applications requiring AEC-Q101 qualification?
No, SMBJ9.0A-M3/52 is not AEC-Q101 qualified. The "M3" suffix indicates halogen-free and RoHS-compliant construction only. For automotive use, Vishay specifies the HM3 suffix with an "X" revision code (e.g., SMBJ9.0AHM3_B/H), which includes full AEC-Q101 testing. The SMBJ9.0A-M3/52 is intended for industrial, telecom, and consumer applications where automotive qualification is not required.
How does the leakage current of SMBJ9.0A-M3/52 compare to other SMBJ variants?
The SMBJ9.0A-M3/52 exhibits a maximum reverse leakage current (ID) of 10 µA at its 9.0 V stand-off voltage (VWM), consistent with all unidirectional SMBJ devices rated ≤10 V VWM. This is half the leakage of the bidirectional SMBJ9.0CA-M3/52 (20 µA max), making the SMBJ9.0A-M3/52 preferable for battery-powered or ultra-low-power sensor circuits where standby current must be minimized.
What is the thermal resistance and recommended PCB layout for SMBJ9.0A-M3/52?
The SMBJ9.0A-M3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W, measured on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain safe operation at 5.0 W continuous power dissipation, the PCB must provide at least this pad area for each terminal, with internal ground/power planes preferred for enhanced heat spreading. The SMBJ9.0A-M3/52 is rated for 150 °C maximum junction temperature.
Does SMBJ9.0A-M3/52 have polarity marking, and how is it oriented on the PCB?
Yes, SMBJ9.0A-M3/52 uses a cathode band marking on the case body to indicate polarity. During PCB layout, the banded end must connect to the higher-potential node (e.g., VCC, signal line), while the unmarked end connects to the lower-potential node (e.g., GND). This orientation ensures proper unidirectional clamping - reverse-biasing the junction during overvoltage events. Incorrect placement will prevent clamping and may cause catastrophic failure.
SMBJ9.0A-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):
- 9V
- Voltage - Breakdown (Min):
- 10V
- Voltage - Clamping (Max) @ Ipp:
- 15.4V
- Current - Peak Pulse (10/1000µs):
- 39A
- 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)
SMBJ9.0A-M3/52 FAQ
1.How can I place an order for SMBJ9.0A-M3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ9.0A-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 SMBJ9.0A-M3/52 reliable?
The price and inventory of SMBJ9.0A-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 SMBJ9.0A-M3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ9.0A-M3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ9.0A-M3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ9.0A-M3/52?
SMBJ9.0A-M3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ9.0A-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 SMBJ9.0A-M3/52?
For technical support, including SMBJ9.0A-M3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ9.0A-M3/52 requirements.
6.How does Aetrix verify that SMBJ9.0A-M3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ9.0A-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 SMBJ9.0A-M3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ9.0A-M3/52?
All SMBJ9.0A-M3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ9.0A-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 SMBJ9.0A-M3/52 part is unused and in its original packaging.
Return procedure for SMBJ9.0A-M3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ9.0A-M3/52 Tags
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