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Vishay General Semiconductor - Diodes Division SMBJ9.0A-M3/5B
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- Part No.:
- SMBJ9.0A-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ9.0A-M3/5B.pdf
- Description:
- TVS DIODE 9VWM 15.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,230
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Product details
Overview
SMBJ9.0A-M3/5B from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for primary overvoltage protection of DC power rails and signal lines. It features a 9.0 V stand-off voltage (VWM), 10.0–11.1 V breakdown range at 1 mA, 15.4 V maximum clamping voltage at 39.0 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive body control modules to safeguard CAN transceivers against load-dump-induced transients.
For engineers reviewing the SMBJ9.0A-M3/5B datasheet, SMBJ9.0A-M3/5B pinout, SMBJ9.0A-M3/5B application, or SMBJ9.0A-M3/5B equivalent, key selection criteria include verified clamping performance under 39 A surge, halogen-free RoHS-compliant construction (M3 suffix), SMB (DO-214AA) package thermal resistance (RθJA = 100 °C/W), and compatibility with automated SMT placement per J-STD-002.
Technical Context
The SMBJ9.0A-M3/5B operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its VBR threshold (10.0–11.1 V @ 1 mA), with cathode band marking polarity. Its low incremental surge resistance ensures stable clamping during repetitive 10/1000 µs transients up to 0.01% duty cycle.
Thermally, it sustains operation from –55 °C to +150 °C junction temperature, with RθJL = 20 °C/W enabling effective heat transfer to PCB copper pads. The device meets MSL Level 1 per J-STD-020 and is rated for 100 A non-repetitive forward surge (8.3 ms half-sine) - critical for inductive switching protection in motor drivers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 9.0 V - Maximum continuous reverse operating voltage before leakage exceeds 10 µA; sets upper limit for protected circuit DC rail. |
| VBR @ IT = 1 mA | 10.0–11.1 V - Verified breakdown onset range; ensures reliable triggering above system nominal voltage with margin. |
| VC @ IPPM = 39.0 A | 15.4 V - Clamped voltage during 600 W transient; defines worst-case stress on downstream ICs like microcontrollers or transceivers. |
| PPPM | 600 W - Peak pulse power handling with 10/1000 µs waveform; qualifies for ISO 7637-2 Pulse 1 & 2a automotive surge immunity. |
| IFSM | 100 A - Single half-sine surge rating (8.3 ms); supports protection of 12 V automotive loads with high inductance (e.g., solenoids, relays). |
| TJmax | +150 °C - Maximum junction temperature; enables use in under-hood ECUs without derating in ambient up to +105 °C. |
| Package | SMB (DO-214AA) - Industry-standard 2-pin surface-mount outline; 0.205" × 0.130" footprint with 0.086" cathode band; compatible with IPC-7351B standard land pattern. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads, MSL Level 1, 260 °C reflow peak. Cathode indicated by black band; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient conduction path | Connects to protected line; conducts reverse surge current to ground when VREV > VBR. |
| Anode (unbanded end) | Reference node | Typically tied to system ground or low-impedance return path; completes clamping loop during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Validated clamping capability for ISO 16750-2 and ISO 7637-2 automotive surge standards without thermal runaway. |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets EU Directive 2011/65/EU and JEDEC J-STD-20E; eliminates brominated flame retardants for safer end-of-life processing. |
| Low clamping ratio (VC/VWM = 1.71) | Minimizes overvoltage stress on 3.3 V/5 V logic interfaces while maintaining margin above VWM for noise immunity. |
| Fast response time (< 1.0 ps) | Clamps transients before propagation into sensitive analog front-ends or communication PHYs (e.g., LIN, CAN FD). |
| MSL Level 1, 260 °C reflow compatible | Enables single-pass lead-free reflow assembly without moisture sensitivity concerns or baking requirements. |
Applications
| Automotive Body Control Module | Industrial PLC Digital Input |
|---|---|
|
Use Scenario: Protecting 12 V supply rail of BCM microcontroller against alternator load dump (ISO 16750-2 Test 4a, 35 V/100 ms). IC Role / Device Role / Timing Role: Unidirectional TVS clamping diode placed between VBAT and GND, upstream of LDO regulator. Use Value: Limits rail voltage to ≤15.4 V during 39 A surge, preventing latch-up or permanent damage to 5 V tolerant MCU I/O pins. |
Use Scenario: Shielding 24 V digital input channel of PLC against field-wiring induced surges (IEC 61000-4-5, 2 kV ring wave). IC Role / Device Role / Timing Role: Primary protection element across input terminal and common reference, coordinated with series current-limiting resistor. Use Value: Absorbs 600 W transient energy within 1 ms, holding input voltage below 18 V to avoid false triggering of optocoupler-based isolation stage. |
| Consumer Appliance Motor Drive | Telecom Power Supply OVP |
|
Use Scenario: Safeguarding gate driver IC supply in BLDC fan controller against back-EMF spikes during commutation. IC Role / Device Role / Timing Role: Local clamping device mounted adjacent to driver IC VDD pin, referenced to local ground plane. Use Value: Clamps 10.0–11.1 V breakdown onset ensures activation before 12 V rail exceeds 15.4 V, preserving driver FET integrity. |
Use Scenario: Overvoltage protection on +48 V telecom rectifier output feeding PoE PSE controller. IC Role / Device Role / Timing Role: Secondary crowbar element triggered after primary regulation failure, shunting excess voltage to chassis ground. Use Value: 15.4 V clamping irrelevant here; instead, 100 A IFSM rating enables safe handling of sustained overvoltage faults without catastrophic failure. |
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-E3/5B | Same electrical specs, but RoHS-compliant with lead-free solderability; lacks halogen-free certification (M3 suffix). | Preferred for commercial-grade industrial equipment where halogen content is not regulated. | Select SMBJ9.0A-E3/5B if halogen-free compliance is unnecessary and cost optimization is prioritized. |
| SMBJ9.0CA-M3/5B | Bidirectional variant; symmetric VBR = 10.0–11.1 V in both directions; no polarity marking. | Required for AC-coupled signal lines (e.g., RS-485, USB D+/D−) or dual-rail protection where reverse polarity events occur. | Choose SMBJ9.0CA-M3/5B only when bidirectional clamping is mandatory; unidirectional SMBJ9.0A-M3/5B offers lower leakage and tighter VC in DC systems. |
Compared with SMBJ9.0A-E3/5B, the M3 version adds halogen-free assurance for automotive Tier 1 supply chains; versus SMBJ9.0CA-M3/5B, the unidirectional configuration delivers 10× lower reverse leakage (<10 µA vs. <20 µA) and avoids unnecessary bidirectional conduction in DC power rails.
Availability
SMBJ9.0A-M3/5B is available at Aetrix Electronics and suitable for automotive electronics, industrial PLCs, consumer appliance motor controls, and telecom power supplies requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBJ9.0A-M3/5B 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and AEC-Q qualification.
The SMBJ series targets robust transient suppression in harsh environments; SMBJ9.0A-M3/5B specifically serves 9 V nominal DC systems needing automotive-grade surge resilience and halogen-free compliance.
FAQ
What is the maximum clamping voltage of SMBJ9.0A-M3/5B at its rated peak pulse current?
The SMBJ9.0A-M3/5B has a maximum clamping voltage (VC) of 15.4 V when subjected to its rated peak pulse current (IPPM) of 39.0 A using a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMBJ9.0A-M3/5B maintains this clamping performance across its full operating temperature range (–55 °C to +150 °C) with minimal drift.
Is SMBJ9.0A-M3/5B suitable for automotive applications requiring AEC-Q101 qualification?
No - SMBJ9.0A-M3/5B is not AEC-Q101 qualified. It carries the M3 suffix indicating halogen-free, RoHS-compliant commercial grade construction. For automotive-qualified versions, select the SMBJ9.0A-HM3_X series (e.g., SMBJ9.0A-HM3_B), where "HM3" denotes halogen-free + AEC-Q101 qualification and "_X" indicates revision code. The SMBJ9.0A-M3/5B remains appropriate for non-safety-critical automotive subsystems where qualification is not mandated.
How does the SMBJ9.0A-M3/5B differ from SMBJ9.0CA-M3/5B in circuit implementation?
The SMBJ9.0A-M3/5B is unidirectional with cathode band marking, conducting only during reverse overvoltage; SMBJ9.0CA-M3/5B is bidirectional with no polarity marking and symmetrical clamping in both directions. In a 9 V DC rail, SMBJ9.0A-M3/5B provides lower reverse leakage (<10 µA at 9.0 V) and avoids unintended conduction during normal forward bias. The SMBJ9.0A-M3/5B must be oriented with cathode toward the protected line, whereas SMBJ9.0CA-M3/5B has no orientation requirement.
What is the thermal resistance from junction to ambient for SMBJ9.0A-M3/5B, and how does it affect layout?
The SMBJ9.0A-M3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain safe junction temperatures under repeated surges, PCB layout must provide minimum pad area per datasheet Fig. 2 derating curves. Reducing pad size increases RθJA, risking thermal runaway during high-duty-cycle transients - a critical consideration in compact automotive modules where the SMBJ9.0A-M3/5B is often deployed.
Can SMBJ9.0A-M3/5B be used in place of SMAJ9.0A for higher surge handling?
No - SMBJ9.0A-M3/5B and SMAJ9.0A belong to different package families (SMB vs. SMA) with distinct power ratings. The SMBJ9.0A-M3/5B delivers 600 W peak pulse power, while SMAJ9.0A is rated for only 400 W. Substituting SMBJ9.0A-M3/5B for SMAJ9.0A may cause mechanical fit issues due to larger SMB footprint (0.205" × 0.130") versus SMA (0.195" × 0.115"), and requires verification of pad layout, thermal relief, and clearance. The SMBJ9.0A-M3/5B is not a drop-in replacement for SMAJ9.0A.
SMBJ9.0A-M3/5B 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-M3/5B FAQ
1.How can I place an order for SMBJ9.0A-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ9.0A-M3/5B 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-M3/5B reliable?
The price and inventory of SMBJ9.0A-M3/5B 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-M3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ9.0A-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ9.0A-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ9.0A-M3/5B?
SMBJ9.0A-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ9.0A-M3/5B 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-M3/5B?
For technical support, including SMBJ9.0A-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ9.0A-M3/5B requirements.
6.How does Aetrix verify that SMBJ9.0A-M3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ9.0A-M3/5B 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-M3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ9.0A-M3/5B?
All SMBJ9.0A-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ9.0A-M3/5B, 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-M3/5B part is unused and in its original packaging.
Return procedure for SMBJ9.0A-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ9.0A-M3/5B Tags
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Diodes Incorporated
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