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STMicroelectronics SMCJ15CA-TR
- Part No.:
- SMCJ15CA-TR
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ15CA-TR.pdf
- Description:
- TVS DIODE 15VWM 32.5VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:8,963
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Product details
Overview
SMCJ15CA-TR from STMicroelectronics is a bidirectional 15 V transient voltage suppression (TVS) diode in SMC package, designed for IEC 61000-4-2 ESD protection (30 kV air/contact) and IEC 61000-4-4 surge immunity (4 kV level 4). It delivers 1500 W peak pulse power (10/1000 µs), clamps at 24.4 V max under 64 A surge, and operates up to 150 °C junction temperature - used in industrial power supplies and telecom interface protection.
For engineers reviewing the SMCJ15CA-TR datasheet, SMCJ15CA-TR pinout, SMCJ15CA-TR application, or SMCJ15CA-TR equivalent, key selection criteria include bidirectional clamping voltage (24.4 V), low leakage (0.2 µA at VRM = 15 V), thermal derating above 25 °C, and SMC footprint compatibility with IPC7531 and JEDEC MO-213AB.
Technical Context
This TVS diode uses planar silicon junction technology to achieve low dynamic resistance (92 mΩ at 25 °C) and stable clamping across temperature (αT = 10⁻⁴/°C). Its bidirectional structure enables symmetric surge suppression on AC-coupled or differential signal lines without polarity constraints.
It meets IEC 61000-4-2 level 4 (30 kV contact/air discharge) and IEC 61000-4-4 level 4 (4 kV), with specified clamping performance verified at both 10/1000 µs and 8/20 µs waveforms - supporting robust front-end protection in SMPS inputs and Ethernet PHY interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRM) | 15 V - maximum continuous reverse working voltage before breakdown begins |
| Breakdown Voltage (VBR) | 16.7–17.6 V at 1 mA - ensures reliable triggering before system-level damage occurs |
| Clamping Voltage (VCL) | 24.4 V max at 64 A (10/1000 µs) - defines worst-case voltage seen by protected IC during surge |
| Peak Pulse Power (PPP) | 1500 W (10/1000 µs) - supports high-energy transients common in industrial environments |
| Leakage Current (IRM) | 0.2 µA at 15 V, 25 °C - minimizes standby power loss and avoids false triggering in high-impedance circuits |
| Junction Temperature Range | −55 to +150 °C - enables deployment in under-hood automotive modules and sealed industrial enclosures |
| Dynamic Resistance (RD) | 92 mΩ - determines voltage rise per amp of surge current beyond rated IPP |
Pinout & Package
The SMCJ15CA-TR is housed in an SMC (DO-214AB) surface-mount package with two terminals: Cathode and Anode arranged in a symmetrical bidirectional configuration. The package complies with JEDEC MO-213AB and IPC7531 footprints, featuring matte tin-plated leads and UL94 V0 epoxy molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode (Bidirectional) | Acts as cathode during positive surges and anode during negative surges - enables dual-polarity clamping |
| Terminal 2 | Cathode (Bidirectional) | Paired terminal completing the symmetrical PN junction path - no fixed polarity reference required |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional surge suppression | Enables single-device protection of AC lines, RS-485 buses, and transformer-coupled interfaces without external polarity management |
| Low leakage current | 0.2 µA at 15 V ensures minimal loading on high-impedance sensor bias networks and battery-backed circuits |
| High-temperature operation | Rated for full 1500 W pulse power up to 150 °C junction temperature - maintains protection integrity in thermally constrained layouts |
| IEC 61000-4-2/4-4 compliance | Validated 30 kV ESD and 4 kV surge immunity eliminates need for additional system-level validation testing |
| Planar junction construction | Delivers consistent VBR and low RD across production lots - critical for repeatable clamping in safety-critical applications |
Applications
| Industrial SMPS Input Protection | RS-485 Transceiver Interface |
|---|---|
Use Scenario: 24 V DC input stage of programmable logic controller (PLC) power supply exposed to load dump and lightning-induced surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed upstream of input rectifier and bulk capacitor. Use Value: Limits transient voltage to ≤24.4 V, preventing MOSFET gate oxide rupture and electrolytic capacitor overvoltage failure. | Use Scenario: Differential data lines of isolated RS-485 transceivers in factory automation networks. IC Role / Device Role / Timing Role: Bidirectional shunt protector on A/B bus lines referenced to local ground. Use Value: Absorbs ±30 kV ESD events without latch-up, preserving signal integrity and avoiding transceiver reset or damage. |
| Telecom DSL Line Card | Automotive Body Control Module (BCM) |
Use Scenario: POTS line interface on DSLAM line card subjected to induced surges from adjacent AC wiring. IC Role / Device Role / Timing Role: Secondary protection device after gas discharge tube (GDT), handling residual fast-rising transients. Use Value: Clamps sub-microsecond spikes to <25 V within 1 ns response time, protecting ADSL PHY analog front-end. | Use Scenario: LIN bus termination point in BCM exposed to ISO 7637-2 pulse 1/2a/5a transients. IC Role / Device Role / Timing Role: Localized clamp on LIN signal line near microcontroller GPIO. Use Value: Maintains bus voltage below 25 V during 100 V/50 ms pulses, preventing MCU I/O latch-up and communication dropout. |
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-TR | 600 W rating (vs. 1500 W); same VBR/VCL but lower IPP (32.4 A vs. 64 A) | Not suitable for >600 W surge environments like industrial AC mains or automotive load dump | Select only when space-constrained SMB footprint is mandatory and surge energy is confirmed ≤600 W |
| 1.5KE15CA | Through-hole DO-201 package; identical electrical specs but higher thermal resistance (RθJA ≈ 15 °C/W vs. SMC's ~50 °C/W) | Requires manual soldering and larger PCB area; unsuitable for automated high-volume SMT assembly | Choose only for legacy through-hole designs or prototyping where reflow compatibility is not required |
Compared with SMBJ15CA-TR and 1.5KE15CA, SMCJ15CA-TR uniquely balances high 1500 W surge capability, SMT-compatible SMC packaging, and validated 30 kV ESD performance - making it optimal for space-constrained, high-reliability industrial and automotive electronics.
Availability
SMCJ15CA-TR is available at Aetrix Electronics and suitable for industrial power supplies, RS-485 communication systems, and automotive body control modules requiring stable component supply and long-term lifecycle support.
Supply support for SMCJ15CA-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, designing and manufacturing analog, microcontroller, power, and sensing solutions for industrial, automotive, and consumer markets.
The SMCJ series belongs to ST's high-power TVS diode product line, engineered specifically for robust electromagnetic immunity in harsh environments - targeting IEC/EN 61000-4-x compliance without external circuitry.
FAQ
What is the maximum clamping voltage of SMCJ15CA-TR at 64 A?
The maximum clamping voltage (VCL) is 24.4 V under a 10/1000 µs surge waveform at 64 A peak current, measured at 25 °C ambient. This value increases with junction temperature at a coefficient of 10⁻⁴/°C, reaching approximately 25.2 V at 125 °C junction temperature.
Is SMCJ15CA-TR unidirectional or bidirectional?
SMCJ15CA-TR is a bidirectional TVS diode, indicated by the "CA" suffix. It provides symmetrical clamping for both positive and negative transients, making it suitable for AC-coupled signals, differential buses (e.g., RS-485), and floating-ground applications without polarity concerns.
Does SMCJ15CA-TR meet automotive AEC-Q200 requirements?
No - SMCJ15CA-TR is not AEC-Q200 qualified. While it operates up to 150 °C junction temperature and meets IEC 61000-4-2/4-4, ST does not list it in their AEC-Q200 stress-tested portfolio. For automotive-critical applications, consider ST's Automotive-grade SMAJ15CA or similar Q200-certified variants.
What is the recommended PCB footprint for SMCJ15CA-TR?
The recommended footprint follows IPC7531 and JEDEC MO-213AB standards: pad length 5.11 mm, pad width 1.54 mm, center-to-center spacing 8.19 mm, with 3.14 mm overall width. Copper area ≥2 cm² per pad is advised to maintain thermal resistance below 50 °C/W for full 1500 W pulse handling.
SMCJ15CA-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-214AB, SMC
- Series:
- SMCJ, 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:
- 32.5V
- Current - Peak Pulse (10/1000µs):
- 308A (8/20µs)
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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:
- SMC
SMCJ15CA-TR FAQ
1.How can I place an order for SMCJ15CA-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ15CA-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 SMCJ15CA-TR reliable?
The price and inventory of SMCJ15CA-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ15CA-TR is usually 5 days.
3.What payment methods are accepted for SMCJ15CA-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ15CA-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ15CA-TR?
SMCJ15CA-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ15CA-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 SMCJ15CA-TR?
For technical support, including SMCJ15CA-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ15CA-TR requirements.
6.How does Aetrix verify that SMCJ15CA-TR is sourced from the original manufacturer or authorized distributors?
All SMCJ15CA-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 SMCJ15CA-TR meets industry standards.
7.What is the process for return or replacement of SMCJ15CA-TR?
All SMCJ15CA-TR units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ15CA-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 SMCJ15CA-TR part is unused and in its original packaging.
Return procedure for SMCJ15CA-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ15CA-TR Tags
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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