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STMicroelectronics SMBJ13CA-TR
- Part No.:
- SMBJ13CA-TR
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ13CA-TR.pdf
- Description:
- TVS DIODE 13VWM 21.5VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:6,020
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Product details
Overview
SMBJ13CA-TR from STMicroelectronics is a bidirectional transient voltage suppression (TVS) diode in SMB package, designed for ESD and surge protection of signal/power lines operating up to 13 V stand-off voltage. It delivers 600 W peak pulse power (10/1000 µs), clamps transients to 21.5 V at 29 A, and maintains ≤1 µA leakage at 85 °C - deployed in industrial I/O interfaces, automotive body control modules, and telecom line cards.
For engineers reviewing the SMBJ13CA-TR datasheet, SMBJ13CA-TR pinout, SMBJ13CA-TR application, or SMBJ13CA-TR equivalent, key selection criteria include bidirectional clamping behavior, 21.5 V clamping voltage at 29 A, 13 V reverse stand-off rating, and compliance with IEC 61000-4-2 level 4 (30 kV contact/air discharge) and UL497B for isolated loop protection.
Technical Context
This bidirectional TVS diode operates symmetrically across both polarities, enabling robust protection against voltage reversals in AC-coupled or floating signal paths. Its planar junction structure ensures low leakage (≤1 µA at 85 °C) and stable clamping performance up to 150 °C junction temperature.
It meets IEC 61000-4-4 level 4 (4 kV) and exceeds IEC 61000-4-2 level 4 with 30 kV air/contact discharge capability. Dynamic resistance is 0.191 Ω at 10/1000 µs, supporting fast response (<1 ns) and minimal overshoot during transient events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRM) | 13 V - maximum continuous reverse operating voltage before clamping initiates |
| Breakdown Voltage (VBR) | 14.4–15.2 V at 1 mA - precise voltage threshold where avalanche conduction begins |
| Clamping Voltage (VCL) | 21.5 V at 29 A (10/1000 µs) - peak voltage seen by protected circuit during surge |
| Peak Pulse Power | 600 W (10/1000 µs), 4 kW (8/20 µs) - defines surge energy handling capacity under standard waveforms |
| Leakage Current | ≤0.2 µA at 25 °C, ≤1 µA at 85 °C - ensures minimal loading on high-impedance signal paths |
| Junction Temperature Range | −55 to +150 °C - supports operation in harsh environments including under-hood automotive and industrial enclosures |
| ESD Rating | ±30 kV (IEC 61000-4-2, contact & air) - exceeds level 4 for reliable human-body-model immunity |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, JEDEC-registered outline with matte tin-plated leads compliant with J-STD-020 MSL level 1 and IPC7531 footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (K) | Anode-side terminal (bidirectional symmetry) | Shared terminal; no polarity distinction - functions identically in either direction |
| Anode (A) | Cathode-side terminal (bidirectional symmetry) | Shared terminal; device conducts symmetrically - no DC bias dependency for clamping |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., RS-485), and floating grounds without polarity concerns |
| Low dynamic resistance | 0.191 Ω (10/1000 µs) minimizes voltage overshoot and improves energy diversion efficiency during fast transients |
| High-temperature reliability | Rated for 150 °C junction operation with <1 µA leakage at 85 °C - critical for sealed industrial and automotive modules |
| UL497B recognition | Agency file E136224 certifies use as isolated loop circuit protector - simplifies safety certification for industrial fieldbus designs |
| Robust surge capability | 4 kW peak power (8/20 µs) handles lightning-induced surges in telecom and building automation wiring |
Applications
| Industrial PLC Analog Input | Automotive Body Control Module |
|---|---|
|
Use Scenario: Protecting 4–20 mA current-loop sensor inputs from ESD and inductive switching transients in factory-floor environments. IC Role / Device Role / Timing Role: Bidirectional TVS placed across input terminals to clamp ±2 kV ESD and 1 kV inductive spikes before they reach precision ADC front-end. Use Value: Prevents latch-up or damage to op-amps and current-sense ICs while maintaining <1 µA leakage to avoid measurement offset errors. |
Use Scenario: Safeguarding LIN bus transceivers and window/mirror motor drivers against load-dump and jump-start transients in vehicle door modules. IC Role / Device Role / Timing Role: Clamping device connected between LIN data line and ground, absorbing 30 kV ESD events and limiting clamped voltage to 21.5 V. Use Value: Ensures uninterrupted communication during EMC testing and extends transceiver lifetime in 12 V battery systems with wide voltage excursions. |
| Telecom DSL Line Interface | Medical Patient Monitor ECG Lead |
|
Use Scenario: Shielding ADSL/VDSL line drivers and receivers from lightning-induced surges entering via outdoor copper pairs. IC Role / Device Role / Timing Role: Bidirectional TVS installed at line interface PCB edge, shunting 4 kV (IEC 61000-4-4) transients away from transformer-coupled PHY ICs. Use Value: Maintains signal integrity with 21.5 V clamping and low capacitance (<100 pF at 0 V), avoiding distortion of high-frequency DSL signals. |
Use Scenario: Protecting low-noise instrumentation amplifiers in ECG front-ends from electrostatic discharge during patient handling and electrode attachment. IC Role / Device Role / Timing Role: TVS placed across differential ECG lead inputs to suppress 30 kV contact discharge without injecting leakage current into ultra-high-Z nodes. Use Value: Preserves microvolt-level signal fidelity with ≤0.2 µA leakage at 25 °C and sub-nanosecond response, meeting IEC 60601-1-2 immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ13CA from Vishay (SMCJ13CA) | Same 13 V VRM, but higher clamping voltage (22.5 V @ 28.5 A) and lower peak power (1500 W @ 8/20 µs) | Larger package (SMA vs SMB) increases board area; less suitable for space-constrained IoT sensor nodes | Prefer when higher surge margin is needed and PCB layout allows larger footprint |
| P6SMB13CA from Littelfuse | Identical VRM (13 V), but slightly higher leakage (≤1 µA at 25 °C) and lower IEC 61000-4-2 rating (25 kV) | Approved for UL497B but lacks agency file number traceability; requires additional test validation for medical safety | Acceptable for cost-sensitive industrial controls where full 30 kV ESD margin is not mandated |
Compared with SMBJ13CA-TR, the Vishay SMCJ13CA offers higher surge headroom but demands more PCB area, while the Littelfuse P6SMB13CA trades ESD margin for lower cost - making the ST part optimal for compact, safety-certified designs requiring guaranteed 30 kV immunity and UL497B traceability.
Availability
SMBJ13CA-TR is available at Aetrix Electronics and suitable for industrial PLC analog inputs, automotive body control modules, telecom DSL line interfaces, and medical ECG lead protection requiring stable component supply and long-term lifecycle support.
Supply support for SMBJ13CA-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, specializing in power management, analog, MEMS, and automotive ICs with strong focus on industrial and automotive reliability.
The SMBJ series was developed specifically for high-reliability transient suppression in space-constrained, high-temperature applications - targeting industrial automation, automotive electronics, and telecom infrastructure where low leakage and certified surge immunity are mandatory.
FAQ
Is SMBJ13CA-TR unidirectional or bidirectional?
SMBJ13CA-TR is a bidirectional TVS diode, indicated by the "CA" suffix per ST's naming convention. It provides symmetrical clamping for both positive and negative transients, making it ideal for AC-coupled lines like RS-485, LIN, and telecom interfaces without polarity constraints.
What is the maximum clamping voltage at rated surge current?
At 29 A peak pulse current (10/1000 µs waveform), the maximum clamping voltage is 21.5 V. This value is measured at 25 °C ambient and remains stable across temperature due to a thermal coefficient (αT) of 8.4 × 10⁻⁴/°C, ensuring predictable protection in varying thermal conditions.
Does SMBJ13CA-TR meet automotive AEC-Q200 requirements?
No - SMBJ13CA-TR is not AEC-Q200 qualified. It is rated for industrial and commercial applications with Tj max = 150 °C and UL497B recognition, but lacks the extended temperature cycling, vibration, and failure analysis required for automotive-grade qualification.
Can SMBJ13CA-TR replace SMBJ13A-TR in a design?
No - SMBJ13A-TR is unidirectional and only clamps positive transients; substituting the bidirectional SMBJ13CA-TR may cause unintended conduction in DC-biased circuits. Use SMBJ13CA-TR only where symmetrical protection is required, such as AC signal paths or floating grounds.
SMBJ13CA-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):
- 13V
- Voltage - Breakdown (Min):
- 14.4V
- Voltage - Clamping (Max) @ Ipp:
- 21.5V
- Current - Peak Pulse (10/1000µs):
- 29A
- 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
SMBJ13CA-TR FAQ
1.How can I place an order for SMBJ13CA-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ13CA-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 SMBJ13CA-TR reliable?
The price and inventory of SMBJ13CA-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ13CA-TR is usually 5 days.
3.What payment methods are accepted for SMBJ13CA-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ13CA-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ13CA-TR?
SMBJ13CA-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ13CA-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 SMBJ13CA-TR?
For technical support, including SMBJ13CA-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ13CA-TR requirements.
6.How does Aetrix verify that SMBJ13CA-TR is sourced from the original manufacturer or authorized distributors?
All SMBJ13CA-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 SMBJ13CA-TR meets industry standards.
7.What is the process for return or replacement of SMBJ13CA-TR?
All SMBJ13CA-TR units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ13CA-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 SMBJ13CA-TR part is unused and in its original packaging.
Return procedure for SMBJ13CA-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ13CA-TR Tags
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