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STMicroelectronics SMBJ15CA-TR
- Part No.:
- SMBJ15CA-TR
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ15CA-TR.pdf
- Description:
- TVS DIODE 15VWM 24.4VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:33,742
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Product details
Overview
SMBJ15CA-TR from STMicroelectronics is a bidirectional transient voltage suppression (TVS) diode designed for robust ESD and surge protection on signal/power lines in industrial, telecom, and automotive electronics. It features a 15 V standoff voltage (VRM), 24.4 V clamping voltage at 25.1 A (10/1000 µs), 600 W peak pulse power rating, and operates up to 150 °C junction temperature - deployed in DC power rails and RS-485 interfaces.
For engineers reviewing the SMBJ15CA-TR datasheet, SMBJ15CA-TR pinout, SMBJ15CA-TR application, or SMBJ15CA-TR equivalent, key selection criteria include bidirectional clamping behavior, low leakage (<0.2 µA @ 25 °C), UL497B recognition (E136224), IEC 61000-4-2 level 4 compliance (30 kV contact/air), and SMB package thermal performance under repeated surge stress.
Technical Context
This TVS diode uses planar silicon junction technology to achieve stable breakdown characteristics and low dynamic resistance (0.236 Ω at 25 °C). Its bidirectional architecture enables symmetric clamping for AC-coupled or floating signal paths without polarity constraints.
It delivers fast response time (<1 ns) and high surge immunity per IEC 61000-4-4 (4 kV level 4) and MIL-STD-883 method 3015. The device maintains clamping integrity across -55 °C to +150 °C operating range with temperature coefficient αT = 8.8 × 10−4/°C for VBR.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRM) | 15 V - Maximum continuous reverse working voltage before significant conduction begins. |
| Breakdown Voltage (VBR min) | 16.7 V @ 1 mA - Guaranteed minimum voltage at which avalanche conduction initiates reliably. |
| Clamping Voltage (VCL) | 24.4 V @ 25.1 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case surge event. |
| Peak Pulse Power (PPP) | 600 W (10/1000 µs) - Sustained surge energy handling capability at 25 °C ambient. |
| Leakage Current (IRM) | 0.2 µA @ 25 °C - Minimal parasitic current draw in standby, critical for low-power sensor nodes. |
| Junction Temperature Range | -55 °C to +150 °C - Enables deployment in under-hood automotive or industrial SMPS environments. |
| ESD Rating | ±30 kV (IEC 61000-4-2, contact & air) - Full immunity to human-body-model ESD events without degradation. |
Pinout & Package
The SMBJ15CA-TR is housed in an SMB (DO-214AA) surface-mount package with two terminals: Cathode (K) and Anode (A), configured as a symmetrical bidirectional pair - no polarity marking required for functional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| K / A | Bidirectional Surge Terminal | Interchangeable terminals; either serves as cathode or anode depending on instantaneous polarity of transient - enables single-device protection of AC or floating lines. |
Key Features
| Feature | Design Value |
|---|---|
| UL497B Recognition | Approved as isolated loop circuit protector (File E136224) - meets safety agency requirements for telecom and industrial isolation barriers. |
| Low-Temperature Leakage Stability | 1 µA max @ 85 °C - ensures minimal standby current drift in thermally stressed environments like motor drives. |
| High-Temperature Power Derating | 350 W @ Tj = 150 °C (10/1000 µs) - maintains usable surge margin even at maximum junction temperature. |
| JEDEC-Compliant SMB Outline | JEDEC registered DO-214AA footprint - guarantees mechanical compatibility with standard PCB assembly processes and reflow profiles. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protection of CAN FD transceiver supply lines against load dump and inductive switching transients. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between VCC and GND adjacent to transceiver IC input pins. Use Value: Limits voltage excursions to ≤24.4 V during 12 V system load dump events, preventing latch-up or permanent damage to 3.3 V/5 V interface ICs. | Use Scenario: Guarding LIN bus data lines against ESD events during vehicle assembly and service. IC Role / Device Role / Timing Role: Low-capacitance TVS placed directly at connector entry point, shunting ESD current away from LIN transceiver input. Use Value: Withstands ±30 kV contact discharge per IEC 61000-4-2 without parameter shift, preserving signal integrity over 10,000+ mating cycles. |
| Telecom Power Feeds | Smart Energy Meters |
Use Scenario: Overvoltage protection on 48 V DC power inputs subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Primary surge clamp in series with upstream fuse and downstream DC-DC converter. Use Value: Clamps 4 kV IEC 61000-4-4 transients to safe levels while maintaining <0.2 µA leakage to avoid metering accuracy drift. | Use Scenario: Protection of isolated RS-485 communication ports against field-induced surges in outdoor meter installations. IC Role / Device Role / Timing Role: Bidirectional TVS mounted across differential A/B lines, referenced to isolated ground plane. Use Value: Symmetric clamping ensures equal protection regardless of line polarity reversal, eliminating need for dual unidirectional devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15CA from Vishay (SMCJ15CA) | Same SMB package, 15 V VRM, but higher clamping voltage (27.7 V @ 21.7 A) and lower PPP (1500 W). | Higher VCL reduces margin for 3.3 V logic protection; better suited for 24 V systems. | Select when higher surge energy tolerance is prioritized over tight clamping control. |
| P6SMB15CA from ON Semiconductor | Identical electrical specs (15 V VRM, 24.4 V VCL @ 25.1 A), but JEDEC MO-213AA (SMB) variant with different lead finish (SnPb vs matte tin). | No functional difference in clamping or thermal performance; RoHS compliance differs. | Choose for legacy SnPb assembly compatibility or alternate sourcing continuity. |
Compared with SMBJ15CA-TR, the Vishay SMCJ15CA offers greater peak power but looser voltage control, while the ON Semiconductor P6SMB15CA matches clamping performance exactly but diverges in lead finish and environmental compliance - making ST's version optimal for new designs requiring UL497B certification and matte tin solderability.
Availability
SMBJ15CA-TR is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom power feeds requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBJ15CA-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, MEMS, and microcontrollers for industrial, automotive, and consumer markets.
The SMBJ series belongs to ST's Transient Voltage Suppressor portfolio, engineered specifically for high-reliability ESD and surge protection in harsh environments where low leakage, high-temperature stability, and regulatory compliance are mandatory.
FAQ
What is the maximum surge current SMBJ15CA-TR can handle in a single 8/20 µs event?
The SMBJ15CA-TR supports up to 32.5 A peak pulse current under an 8/20 µs waveform, corresponding to a clamping voltage of 32.5 V. This value is confirmed in Table 2 of DS1283 Rev 14 and reflects worst-case surge handling at 25 °C ambient with proper PCB copper area per Figure 12.
Does SMBJ15CA-TR require orientation during PCB placement?
No - SMBJ15CA-TR is a bidirectional TVS diode with symmetrical K/A terminals, meaning it functions identically regardless of orientation on the board. The device has no polarity-dependent behavior, simplifying layout and reducing assembly errors in high-volume manufacturing.
How does SMBJ15CA-TR perform at elevated junction temperatures?
At Tj = 150 °C, SMBJ15CA-TR retains 350 W peak pulse power (10/1000 µs), and its clamping voltage increases predictably using αT = 8.8 × 10−4/°C. Breakdown voltage rises linearly with temperature, ensuring consistent protection margins across the full -55 °C to +150 °C operating range.
Is SMBJ15CA-TR compliant with lead-free reflow standards?
Yes - SMBJ15CA-TR follows JEDEC J-STD-020 MSL Level 1 and is qualified for lead-free reflow with a peak profile of 240–245 °C for ≤60 seconds. Its matte tin-plated leads meet J-STD-002 and JESD 22-B102 E3 specifications, ensuring reliable wetting and intermetallic formation during standard SMT processes.
SMBJ15CA-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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 24.4V
- Current - Peak Pulse (10/1000µs):
- 25.1A
- 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
SMBJ15CA-TR FAQ
1.How can I place an order for SMBJ15CA-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ15CA-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 SMBJ15CA-TR reliable?
The price and inventory of SMBJ15CA-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ15CA-TR is usually 5 days.
3.What payment methods are accepted for SMBJ15CA-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ15CA-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ15CA-TR?
SMBJ15CA-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ15CA-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 SMBJ15CA-TR?
For technical support, including SMBJ15CA-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ15CA-TR requirements.
6.How does Aetrix verify that SMBJ15CA-TR is sourced from the original manufacturer or authorized distributors?
All SMBJ15CA-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 SMBJ15CA-TR meets industry standards.
7.What is the process for return or replacement of SMBJ15CA-TR?
All SMBJ15CA-TR units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ15CA-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 SMBJ15CA-TR part is unused and in its original packaging.
Return procedure for SMBJ15CA-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ15CA-TR Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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Diodes Incorporated
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D12V0L1B2LP-7B
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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