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STMicroelectronics SMCJ48CA-TR
- Part No.:
- SMCJ48CA-TR
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ48CA-TR.pdf
- Description:
- TVS DIODE 48VWM 100VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:6,036
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Product details
Overview
SMCJ48CA-TR from STMicroelectronics is a bidirectional 1500 W transient voltage suppression (TVS) diode in SMC package, designed for high-energy ESD and surge protection in DC power rails and signal lines. It features a standoff voltage (VRM) of 48 V, clamping voltage (VCL) of 77.4 V at 20 A (10/1000 µs), low leakage current (≤0.2 µA at 25 °C), and operates up to 150 °C junction temperature - deployed in industrial power supplies and automotive body control modules.
For engineers reviewing the SMCJ48CA-TR datasheet, SMCJ48CA-TR pinout, SMCJ48CA-TR application, or SMCJ48CA-TR equivalent, key selection criteria include bidirectional clamping behavior, 77.4 V max clamping at 20 A, 1500 W peak pulse power (10/1000 µs), thermal derating above 25 °C, and compatibility with IPC7531-compliant SMC footprints.
Technical Context
This TVS diode uses planar silicon avalanche technology to provide fast response (<1 ns) to transients while maintaining low dynamic resistance (0.925 Ω at 25 °C). Its bidirectional configuration enables symmetric clamping for AC-coupled or floating bus lines without polarity constraints.
Electrical characteristics are temperature-dependent: VBR and VCL shift with junction temperature per αT = 10.3 × 10⁻⁴ /°C, and peak power capability drops to 1250 W at Tj = 150 °C (10/1000 µs), requiring thermal design validation for sustained surge duty.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500 W (10/1000 µs); sustains single high-energy surges in industrial power input stages |
| Standoff Voltage (VRM) | 48 V; maximum continuous reverse working voltage before conduction begins |
| Clamping Voltage (VCL) | 77.4 V at 20 A (10/1000 µs); limits downstream voltage during surge to protect 60 V-rated ICs |
| Leakage Current (IRM) | ≤0.2 µA at 25 °C; negligible standby power loss in battery-backed or low-power systems |
| Junction Temperature Range | –55 °C to +150 °C; supports operation in under-hood automotive or high-ambient industrial enclosures |
| ESD Rating | ±30 kV contact & air discharge (IEC 61000-4-2); exceeds Level 4 for robust front-end port protection |
| Surge Rating | 4 kV (IEC 61000-4-4 Level 4); withstands repetitive fast transient bursts on 24/48 V DC distribution lines |
Pinout & Package
SMCJ48CA-TR is housed in an SMC (DO-214AB) surface-mount package with two terminals: Cathode (K) and Anode (A). The bidirectional structure means both terminals behave identically under reverse or forward surge conditions - no polarity marking required for functional operation, though standard cathode band orientation applies per JEDEC outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Surge current entry point (bidirectional) | Accepts transient energy from either polarity; connects to protected line or ground return path |
| Cathode (K) | Surge current exit point (bidirectional) | Completes clamping path to reference plane; terminal symmetry enables flexible PCB layout |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC-coupled interfaces (e.g., RS-485, CAN FD) without external polarity management |
| Low dynamic resistance (RD) | 0.925 Ω at 25 °C ensures minimal voltage overshoot during high di/dt surges |
| High-temperature stability | Rated for full 1500 W pulse power at Tj ≤ 25 °C and 1250 W at Tj = 150 °C |
| UL94 V0 epoxy housing | Meets flammability safety requirements for enclosed industrial and transportation equipment |
| JEDEC-compliant SMC footprint | Ensures mechanical reliability and thermal performance with standard FR4 PCB copper area recommendations |
Applications
| Industrial PLC I/O Module | Automotive Body Control Unit (BCU) |
|---|---|
|
Use Scenario: 24 V DC input protection against load dump and ISO 7637-2 pulses in programmable logic controller field terminals. IC Role / Device Role / Timing Role: Primary clamping device across power rail and isolated digital inputs, absorbing >100 A surges within nanoseconds. Use Value: Prevents latch-up or destruction of isolated RS-485 transceivers and microcontroller GPIOs during factory floor ESD events. |
Use Scenario: Protection of LIN bus and sensor supply lines in door module electronics exposed to battery transients. IC Role / Device Role / Timing Role: Bidirectional TVS placed between LIN transceiver VCC and chassis ground, clamping both positive and negative spikes. Use Value: Maintains communication integrity during jump-start events by limiting voltage to <80 V, below LIN PHY breakdown threshold. |
| Telecom Power Supply Input | Renewable Energy Inverter DC Link |
|
Use Scenario: Surge suppression on 48 V telecom rectifier outputs subject to lightning-induced surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: Secondary-level TVS parallel to bulk capacitor, activated after MOV primary stage to handle residual fast-rising edges. Use Value: Reduces voltage overshoot to <78 V, preventing overvoltage stress on downstream DC-DC controllers rated for 60 V max input. |
Use Scenario: Protection of gate driver supply rails in solar inverter half-bridge circuits exposed to switching-induced transients. IC Role / Device Role / Timing Role: Localized clamping on isolated 15 V gate bias rails, suppressing dV/dt coupling from high-side switch transitions. Use Value: Eliminates false triggering of gate drivers by limiting transient excursions to <25 V, preserving PWM timing accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ48CA-TR | Lower peak power rating (600 W vs. 1500 W), same VRM/VCL, SMB package (smaller thermal mass) | Limited to lower-energy surges; unsuitable for load dump or high-current industrial transients | Select only when space-constrained and surge threat level is ≤600 W (10/1000 µs) |
| 1.5KE48CA | Through-hole DO-201 package, identical electrical specs but higher thermal resistance and no RoHS-compliant matte tin finish | Not suitable for automated SMT assembly; requires wave soldering and larger board area | Choose only for legacy through-hole designs or where reflow compatibility is not required |
Compared with SMBJ48CA-TR and 1.5KE48CA, SMCJ48CA-TR delivers superior surge handling in compact SMT form factor with certified lead-free plating and validated thermal performance on standard FR4 layouts.
Availability
SMCJ48CA-TR is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, telecom power supplies, and renewable energy inverters requiring stable component supply and long-term obsolescence mitigation.
Supply support for SMCJ48CA-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 automotive-grade components with vertical manufacturing capabilities.
SMCJ series TVS diodes belong to ST's transient protection portfolio, engineered specifically for high-reliability industrial and automotive applications demanding precise clamping, low leakage, and extended temperature operation.
FAQ
What is the maximum clamping voltage of SMCJ48CA-TR at 20 A (10/1000 µs)?
The maximum clamping voltage (VCL) is 77.4 V under 10/1000 µs waveform at 20 A test current, measured at 25 °C ambient. This value increases with junction temperature per αT = 10.3 × 10⁻⁴ /°C, reaching ~82.5 V at Tj = 125 °C.
Is SMCJ48CA-TR unidirectional or bidirectional?
SMCJ48CA-TR is a bidirectional TVS diode, indicated by the "CA" suffix. It provides symmetrical clamping for both positive- and negative-polarity transients, making it suitable for AC-coupled buses like RS-485 or floating sensor lines without polarity-sensitive placement.
Does SMCJ48CA-TR meet automotive qualification standards?
While not AEC-Q200 qualified, SMCJ48CA-TR meets IEC 61000-4-2 (±30 kV ESD), IEC 61000-4-4 (4 kV EFT), and operates up to 150 °C junction temperature - enabling use in non-safety-critical automotive subsystems such as body electronics and infotainment power rails when validated per system-level requirements.
What is the recommended PCB footprint for SMCJ48CA-TR?
The recommended footprint follows IPC7531 and JEDEC DO-214AB outlines: pad length 5.11 mm, pad width 3.14 mm, center-to-center spacing 8.19 mm. Minimum copper area under each lead is 1 cm² per Figure 12 to maintain Rth(j-a) ≤ 100 °C/W for optimal thermal derating during surge events.
SMCJ48CA-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):
- 48V
- Voltage - Breakdown (Min):
- 53.3V
- Voltage - Clamping (Max) @ Ipp:
- 100V
- Current - Peak Pulse (10/1000µs):
- 100A (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
SMCJ48CA-TR FAQ
1.How can I place an order for SMCJ48CA-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ48CA-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 SMCJ48CA-TR reliable?
The price and inventory of SMCJ48CA-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ48CA-TR is usually 5 days.
3.What payment methods are accepted for SMCJ48CA-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ48CA-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ48CA-TR?
SMCJ48CA-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ48CA-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 SMCJ48CA-TR?
For technical support, including SMCJ48CA-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ48CA-TR requirements.
6.How does Aetrix verify that SMCJ48CA-TR is sourced from the original manufacturer or authorized distributors?
All SMCJ48CA-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 SMCJ48CA-TR meets industry standards.
7.What is the process for return or replacement of SMCJ48CA-TR?
All SMCJ48CA-TR units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ48CA-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 SMCJ48CA-TR part is unused and in its original packaging.
Return procedure for SMCJ48CA-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ48CA-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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D5V0P1B2LP-7B
Diodes Incorporated
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Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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