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STMicroelectronics SMBJ16A-TR
- Part No.:
- SMBJ16A-TR
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ16A-TR.pdf
- Description:
- TVS DIODE 16VWM 26VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:19,090
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Product details
Overview
SMBJ16A-TR from STMicroelectronics is a unidirectional transient voltage suppression (TVS) diode designed for primary overvoltage protection of DC power rails and signal lines in industrial, automotive, and telecom systems. It features a 16 V standoff voltage (VRM), 26 V clamping voltage at 23.1 A (10/1000 µs), 600 W peak pulse power rating, 0.2 µA max leakage at 25 °C, and operates up to 150 °C junction temperature.
For engineers reviewing the SMBJ16A-TR datasheet, SMBJ16A-TR pinout, SMBJ16A-TR application, or SMBJ16A-TR equivalent, key selection criteria include clamping performance under IEC 61000-4-2/4-4 surges, thermal derating at elevated Tj, low-leakage operation in battery-backed circuits, and UL497B recognition for isolated loop protection.
Technical Context
This TVS diode uses planar silicon technology to achieve stable breakdown characteristics and low leakage across temperature. Its unidirectional configuration provides asymmetric clamping-low forward voltage during normal conduction and sharp reverse avalanche response during transients-making it suitable for DC-biased interfaces like RS-485, CAN, and 24 V PLC inputs.
The device complies with IEC 61000-4-2 (30 kV contact/air discharge) and IEC 61000-4-4 (4 kV level 4), with dynamic resistance of 0.276 Ω at 25 °C enabling fast voltage limiting. Its SMB package supports high-power dissipation up to 350 W at 150 °C junction temperature, validated per JEDEC JESD22-B102 and J-STD-020 MSL level 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRM) | 16 V - Maximum continuous reverse operating voltage before clamping begins |
| Breakdown Voltage (VBR min) | 17.8 V at 1 mA - Ensures reliable triggering above nominal rail without false trips |
| Clamping Voltage (VCL) | 26 V at 23.1 A (10/1000 µs) - Limits transient voltage to safe levels for downstream 3.3 V/5 V logic |
| Peak Pulse Power (PPP) | 600 W (10/1000 µs) - Sustains industrial surge events per IEC 61000-4-4 without degradation |
| Leakage Current (IRM) | 0.2 µA at 16 V, 25 °C - Minimizes standby power loss in battery-powered sensors and IoT nodes |
| Junction Temperature Range | –55 °C to +150 °C - Enables deployment in engine control units and outdoor base stations |
| UL Recognition | UL497B (E136224) - Certified for use as an isolated loop circuit protector in safety-critical systems |
Pinout & Package
The SMBJ16A-TR is housed in an SMB (DO-214AA) surface-mount package measuring 3.30–3.95 mm × 5.10–5.60 mm × 2.45 mm max height, with matte tin-plated leads compliant with J-STD-002 and IPC7531 footprint standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Marked Band) | Transient current sink | Connected to protected line; conducts surge current to ground during overvoltage |
| Anode | Reference/return path | Tied to system ground or lower-potential rail; completes clamping path during reverse avalanche |
Key Features
| Feature | Design Value |
|---|---|
| Low clamping ratio (VCL/VBR ≈ 1.46) | Ensures minimal overvoltage stress on protected ICs during 23.1 A transients |
| High-temperature power derating | Maintains 350 W surge capability at 150 °C junction temperature for under-hood applications |
| UL497B isolation certification | Validates suitability for secondary-side protection in isolated power supplies and fieldbus interfaces |
| IEC 61000-4-2 level 4 compliance | Withstands 30 kV ESD strikes without parametric shift or failure in automated test equipment |
Applications
| Industrial PLC I/O Modules | Automotive Body Control Modules |
|---|---|
Use Scenario: Protection of 24 V digital input channels against inductive switching spikes and lightning-induced surges on factory floor wiring. IC Role / Device Role / Timing Role: Primary clamping element placed directly at connector entry point to limit transient voltage before reaching optocoupler or microcontroller GPIO. Use Value: Prevents latch-up and permanent damage to input conditioning circuitry while maintaining <0.2 µA leakage to avoid false triggering in high-impedance sensing. | Use Scenario: Surge suppression on LIN bus lines and sensor supply rails exposed to load dump and alternator ripple in vehicle cabin electronics. IC Role / Device Role / Timing Role: Unidirectional TVS placed between LIN transceiver VCC pin and chassis ground to clamp positive-going transients only. Use Value: Clamps 23.1 A surges to ≤26 V within nanoseconds, preserving signal integrity and meeting ISO 16750-2 pulse 5a requirements. |
| Telecom Power Feeds | Medical Diagnostic Equipment |
Use Scenario: Overvoltage protection on -48 V DC power distribution boards in central office equipment subjected to AC mains coupling and lightning induction. IC Role / Device Role / Timing Role: Reverse-biased TVS connected between -48 V rail and return, absorbing negative transients while blocking normal operating current. Use Value: Delivers 600 W peak power handling at ambient temperatures up to 70 °C, supporting long-term reliability in sealed enclosures. | Use Scenario: ESD safeguarding of analog front-end inputs in portable ultrasound and ECG devices where low leakage and biocompatibility are critical. IC Role / Device Role / Timing Role: First-line defense on patient-connected signal paths, placed before instrumentation amplifiers to prevent saturation and offset drift. Use Value: 0.2 µA leakage at 25 °C avoids DC error injection into µV-level bio-signal chains, ensuring diagnostic accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ16CA-TR | Bidirectional version with symmetric ±16 V standoff and identical clamping (26 V @ 23.1 A) | Required for AC-coupled or dual-polarity signal lines (e.g., RS-422, USB D+/D−) | Select when protecting balanced differential pairs or circuits with no defined DC bias polarity |
| SMAJ16A-TR | Lower 400 W peak power rating (10/1000 µs); same VRM/VCL but higher dynamic resistance (0.328 Ω) | Suitable for lower-energy transients; not rated for IEC 61000-4-4 level 4 in high-reliability designs | Choose only for cost-sensitive consumer applications where full 600 W margin is unnecessary |
Compared with SMBJ16CA-TR and SMAJ16A-TR, the SMBJ16A-TR offers optimal balance of unidirectional clamping precision, 600 W surge capacity, and UL497B certification-making it the preferred choice for industrial DC power rail protection where polarity is fixed and regulatory compliance is mandatory.
Availability
SMBJ16A-TR is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, and telecom power feed applications requiring stable component supply, long-lifecycle support, and traceable sourcing.
Supply support for SMBJ16A-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, delivering innovative solutions across automotive, industrial, power, and smart mobility markets with over 40 years of analog and protection device expertise.
The SMBJ series belongs to ST's high-reliability TVS portfolio, engineered specifically for robust transient immunity in harsh environments-including factory automation, transportation infrastructure, and medical electronics-where low leakage, high Tj operation, and international safety certifications are non-negotiable.
FAQ
What is the maximum clamping voltage of SMBJ16A-TR under a 10/1000 µs surge?
The SMBJ16A-TR clamps to a maximum of 26 V when subjected to a 23.1 A, 10/1000 µs surge waveform at 25 °C. This value increases linearly with junction temperature at a coefficient of 8.8 × 10⁻⁴ V/°C, reaching approximately 28.2 V at 150 °C junction temperature per the datasheet's αT parameter.
Does SMBJ16A-TR meet IEC 61000-4-2 ESD immunity requirements?
Yes-SMBJ16A-TR exceeds IEC 61000-4-2 level 4, withstanding 30 kV contact discharge and 30 kV air discharge without parametric shift or functional failure. Its fast response time (<1 ns) and low dynamic resistance (0.276 Ω) ensure effective energy diversion before sensitive components experience overstress.
Can SMBJ16A-TR be used in bidirectional signal lines?
No-SMBJ16A-TR is unidirectional and conducts only in reverse avalanche mode; it blocks forward current beyond ~1.5 V. For bidirectional protection (e.g., RS-485, USB), the SMBJ16CA-TR variant must be used, which provides symmetrical ±16 V standoff and clamping in both polarities.
What is the thermal resistance junction-to-ambient for SMBJ16A-TR on a standard FR4 PCB?
On a standard epoxy FR4 board with 70 µm copper thickness and the recommended IPC7531 footprint, the SMBJ16A-TR exhibits a thermal resistance (Rth j-a) of approximately 120 °C/W for a single pulse. With 2 cm² of copper area under each lead, this improves to ~4.5 °C/W, enabling sustained 350 W surge capability at 150 °C junction temperature.
SMBJ16A-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):
- 16V
- Voltage - Breakdown (Min):
- 17.8V
- Voltage - Clamping (Max) @ Ipp:
- 26V
- Current - Peak Pulse (10/1000µs):
- 23.1A
- 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
SMBJ16A-TR FAQ
1.How can I place an order for SMBJ16A-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ16A-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 SMBJ16A-TR reliable?
The price and inventory of SMBJ16A-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ16A-TR is usually 5 days.
3.What payment methods are accepted for SMBJ16A-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ16A-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ16A-TR?
SMBJ16A-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ16A-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 SMBJ16A-TR?
For technical support, including SMBJ16A-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ16A-TR requirements.
6.How does Aetrix verify that SMBJ16A-TR is sourced from the original manufacturer or authorized distributors?
All SMBJ16A-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 SMBJ16A-TR meets industry standards.
7.What is the process for return or replacement of SMBJ16A-TR?
All SMBJ16A-TR units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ16A-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 SMBJ16A-TR part is unused and in its original packaging.
Return procedure for SMBJ16A-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ16A-TR Tags
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ESD9B5.0ST5G
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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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