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STMicroelectronics SMBJ5.0A-TR
- Part No.:
- SMBJ5.0A-TR
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ5.0A-TR.pdf
- Description:
- TVS DIODE 5VWM 9.2VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:7,032
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Product details
Overview
SMBJ5.0A-TR from STMicroelectronics is a unidirectional transient voltage suppression (TVS) diode designed for primary-level surge protection on DC power rails and signal lines. It features a 5.0 V standoff voltage (VRM), 6.40 V minimum breakdown voltage (VBR) at 10 mA, 9.2 V clamping voltage (VCL) at 68 A peak pulse current (IPP), and 600 W peak pulse power rating (10/1000 µs). It is used in industrial power supplies to safeguard downstream MOSFETs and ICs against IEC 61000-4-4 level 4 (4 kV) fast transients.
For engineers reviewing the SMBJ5.0A-TR datasheet, SMBJ5.0A-TR pinout, SMBJ5.0A-TR application, or SMBJ5.0A-TR equivalent, key selection criteria include clamping voltage margin relative to protected device VDS(max), leakage current at elevated temperature, junction temperature derating above 25 °C, and UL497B recognition for isolated loop circuit protection.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal bias it presents <0.2 µA leakage at 25 °C and 5.0 V reverse voltage; during transient events exceeding VBR, it avalanches into low-impedance conduction within <1 ns to limit voltage across the protected node to ≤9.2 V at 68 A. Its planar silicon construction enables stable performance up to 150 °C junction temperature.
The device complies with IEC 61000-4-2 (30 kV air/contact discharge), IEC 61000-4-4 (4 kV), and UL497B (file E136224) for isolated loop circuits. Its dynamic resistance of 0.031 Ω at 10/1000 µs ensures minimal voltage overshoot during high-current surges, while its SMB package supports IPC7531-compliant PCB layout and JEDEC-standard thermal management.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRM) | 5.0 V - Maximum continuous reverse operating voltage before significant leakage begins |
| Breakdown Voltage (VBR) | 6.40 V min at 10 mA - Threshold at which avalanche conduction initiates reliably |
| Clamping Voltage (VCL) | 9.2 V at 68 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case surge |
| Peak Pulse Power (PPP) | 600 W (10/1000 µs) - Sustained surge energy handling capability at 25 °C ambient |
| Leakage Current (IRM) | 20 µA max at 5.0 V and 25 °C - Ensures minimal standby power loss in battery-powered systems |
| Junction Temperature (Tj) | -55 to +150 °C - Enables operation in high-temperature industrial enclosures without derating |
| Dynamic Resistance (RD) | 0.031 Ω - Low impedance during clamping minimizes voltage overshoot beyond VCL |
Pinout & Package
The SMBJ5.0A-TR is housed in an SMB (DO-214AA) surface-mount package measuring 3.30–3.95 mm × 5.10–5.60 mm × 1.90–2.45 mm (L × W × H), with matte tin-plated leads compliant with J-STD-002 and MIL-STD-750 method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (marked band) | Surge return path | Connected to system ground or low-impedance reference; carries full transient current during clamping |
| Anode | Protected line input | Connected to DC rail or signal line being safeguarded; voltage referenced to cathode during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| UL497B Recognition | Approved as isolated loop circuit protector (file E136224), enabling use in telecom and industrial safety-critical interfaces |
| Low-Temperature Leakage | ≤0.2 µA at 25 °C and 5.0 V VRM - preserves signal integrity and reduces quiescent power in precision analog front-ends |
| High-Temperature Stability | Rated for 150 °C Tj operation with only 5.7×10⁻⁴/°C temperature coefficient - maintains clamping consistency in thermally stressed environments |
| Fast Response Time | <1 ns turn-on - intercepts sub-microsecond transients before sensitive components experience overstress |
| IEC 61000-4-2 Compliance | Withstands 30 kV air and contact discharge - exceeds Level 4 immunity requirements for industrial equipment |
Applications
| Industrial Power Supply Input Protection | Automotive Body Control Module (BCM) CAN Bus Line Protection |
|---|---|
Use Scenario: 24 V DC input stage of programmable logic controller (PLC) power supply exposed to load dump and inductive switching transients. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between VIN and GND to clamp surges before they reach upstream rectifier and downstream DC-DC controller. Use Value: Limits transient voltage to ≤9.2 V, preventing damage to 36 V-rated input capacitors and 40 V MOSFETs while maintaining <20 µA leakage at nominal 24 V. | Use Scenario: CAN_H and CAN_L lines in automotive BCM subjected to ISO 7637-2 pulse 1/2a/3a and ESD per ISO 10605. IC Role / Device Role / Timing Role: Bidirectional TVS pair (SMBJ5.0CA variant) placed across differential bus to suppress common-mode transients without distorting signal edges. Use Value: Clamps ±30 kV ESD events to <12 V differential swing, preserving CAN FD bit timing integrity and avoiding false dominant/recessive state detection. |
| Telecom DSL Line Card Surge Protection | Medical Infusion Pump Motor Driver Protection |
Use Scenario: Primary-side protection on POTS line interface of DSLAM line card, subject to lightning-induced surges per ITU-T K.20/K.21. IC Role / Device Role / Timing Role: Unidirectional TVS (SMBJ5.0A) installed on tip/ring lines referenced to isolation barrier ground to absorb longitudinal surges. Use Value: UL497B recognition validates safe operation in isolated loop circuits, while 600 W (10/1000 µs) rating handles 1 kV/µs surges without thermal runaway. | Use Scenario: H-bridge gate driver supply rail in battery-powered infusion pump, exposed to motor back-EMF spikes during rapid direction reversal. IC Role / Device Role / Timing Role: TVS diode placed across 12 V VDD rail to clamp inductive kickback from motor winding commutation. Use Value: 9.2 V clamping ensures gate drivers remain within absolute maximum ratings (<16 V), preventing latch-up or permanent failure during repeated motor starts/stops. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ5.0CA-TR | Bidirectional configuration; symmetric clamping (±9.2 V); same VBR, VCL, and PPP ratings | Required for AC-coupled or differential signal lines (e.g., RS-485, CAN) where polarity reversal occurs | Select when protecting bidirectional data buses or AC power inputs where reverse polarity surges must be suppressed |
| SMCJ5.0A-TR | Larger SMC (DO-214AB) package; higher 1500 W (10/1000 µs) rating; identical electrical specs but higher thermal mass | Suitable for higher-energy surge environments (e.g., outdoor telecom cabinets) requiring extended surge endurance | Choose when system-level testing reveals >600 W surge exposure or when board layout allows larger footprint for improved thermal dissipation |
Compared with SMBJ5.0CA-TR, the unidirectional SMBJ5.0A-TR offers lower capacitance and tighter clamping margin for DC rails, while SMCJ5.0A-TR trades PCB area for superior energy absorption-making each optimal for distinct surge severity and layout constraints.
Availability
SMBJ5.0A-TR is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, telecom line cards, and medical motor drivers requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBJ5.0A-TR 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in power management, analog, microcontrollers, and discrete protection devices.
The SMBJ series belongs to ST's Transient Voltage Suppressor portfolio, engineered specifically for robust, standards-compliant surge protection in harsh industrial, automotive, and telecom environments where reliability under repetitive transient stress is critical.
FAQ
What is the maximum clamping voltage of SMBJ5.0A-TR at 68 A?
The maximum clamping voltage (VCL) is 9.2 V at 68 A peak pulse current under 10/1000 µs waveform conditions, measured at 25 °C ambient. This value increases with junction temperature at a rate of 5.7×10⁻⁴/°C, reaching approximately 10.1 V at 125 °C Tj.
Does SMBJ5.0A-TR meet UL497B requirements?
Yes, SMBJ5.0A-TR is recognized to UL497B as an isolated loop circuit protector under agency file number E136224. This certification confirms its suitability for use in telecom and industrial applications where galvanic isolation and surge protection coexist in the same circuit path.
How does leakage current change with temperature?
At 5.0 V reverse voltage, leakage current is ≤20 µA at 25 °C and rises to ≤50 µA at 85 °C. The datasheet specifies that IR remains below 1 µA up to 85 °C for VRM < 10 V, confirming stable performance across extended industrial temperature ranges.
Can SMBJ5.0A-TR be used in bidirectional signal lines?
No-SMBJ5.0A-TR is unidirectional and conducts only in reverse bias. For bidirectional signal lines like RS-485 or CAN, the SMBJ5.0CA-TR variant must be used, as it provides symmetrical clamping for both positive and negative transients without polarity dependence.
SMBJ5.0A-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-214AA, SMB
- Series:
- SMBJ, TRANSIL™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 5V
- Voltage - Breakdown (Min):
- 6.4V
- Voltage - Clamping (Max) @ Ipp:
- 9.2V
- Current - Peak Pulse (10/1000µs):
- 68A
- 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:
- SMB
SMBJ5.0A-TR FAQ
1.How can I place an order for SMBJ5.0A-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ5.0A-TR 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 SMBJ5.0A-TR reliable?
The price and inventory of SMBJ5.0A-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ5.0A-TR is usually 5 days.
3.What payment methods are accepted for SMBJ5.0A-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ5.0A-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ5.0A-TR?
SMBJ5.0A-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ5.0A-TR 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 SMBJ5.0A-TR?
For technical support, including SMBJ5.0A-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ5.0A-TR requirements.
6.How does Aetrix verify that SMBJ5.0A-TR is sourced from the original manufacturer or authorized distributors?
All SMBJ5.0A-TR 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 SMBJ5.0A-TR meets industry standards.
7.What is the process for return or replacement of SMBJ5.0A-TR?
All SMBJ5.0A-TR units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ5.0A-TR, 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 SMBJ5.0A-TR part is unused and in its original packaging.
Return procedure for SMBJ5.0A-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ5.0A-TR Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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