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STMicroelectronics SMC50J100CA
- Part No.:
- SMC50J100CA
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC50J100CA.pdf
- Description:
- Linear IC's
- Quantity:
- Payment:
- Shipping:
Inventory:6,035
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Product details
Overview
SMC50J100CA from STMicroelectronics is a bidirectional transient voltage suppression (TVS) diode designed for high-energy surge protection in DC power lines and signal interfaces. It delivers 5000 W peak pulse power (10/1000 µs), clamps at 179 V (max) under 28 A IPP, and operates up to 175 °C junction temperature - enabling robust protection in industrial motor drives, telecom power supplies, and automotive body control modules.
For engineers reviewing the SMC50J100CA datasheet, SMC50J100CA pinout, SMC50J100CA application, or SMC50J100CA equivalent, key selection criteria include its 100 V standoff voltage, bidirectional polarity, low 0.2 µA leakage at 25 °C, IEC 61000-4-2 ±30 kV ESD rating, and JEDEC-standard SMC package compatibility with automated assembly.
Technical Context
This planar-junction TVS diode uses silicon avalanche technology to provide fast response (<1 ns) to transients while maintaining low dynamic resistance (392 mΩ at 8/20 µs). Its bidirectional configuration enables symmetric clamping for AC-coupled or floating signal paths without polarity dependency.
The device meets IEC 61000-4-4 Level 4 (4 kV) and exceeds IEC 61000-4-2 Level 4 for both air and contact discharge. Thermal design is supported by a maximum junction temperature of 175 °C and validated thermal impedance curves for FR4 PCBs with recommended copper area.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRM) | 100 V - Maximum continuous reverse operating voltage before significant leakage or conduction begins. |
| Breakdown Voltage (VBR) | 111–123 V at 1 mA - Ensures reliable triggering above normal operating voltage with margin against false triggering. |
| Clamping Voltage (VCL) | 179 V max at 28 A (10/1000 µs) - Limits downstream voltage stress during surge events to protect sensitive ICs. |
| Peak Pulse Power | 5000 W (10/1000 µs); up to 2000 W at 175 °C - Enables sustained surge handling in high-temperature environments like engine bays or enclosed power systems. |
| Leakage Current | 0.2 µA at 25 °C and VRM - Minimizes standby power loss and avoids interference in high-impedance sensing circuits. |
| Junction Temperature Range | −55 °C to +175 °C - Supports operation in extended industrial and automotive under-hood applications without derating. |
| ESD Rating | ±30 kV (IEC 61000-4-2, contact & air) - Provides system-level ESD immunity without additional external protection layers. |
Pinout & Package
SMC50J100CA is housed in a JEDEC-registered SMC (DO-214AB) surface-mount package with matte tin-plated leads. The bidirectional configuration means both terminals are electrically symmetrical - no anode/cathode distinction - and the device mounts across the protected line with no polarity orientation required.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient current path | Both terminals conduct equally during positive or negative surges - eliminates layout polarity constraints and simplifies PCB routing for AC or floating rails. |
| Cathode bar marking (absent) | Device polarity indicator | No cathode bar present - confirms bidirectional functionality; distinguishes it from unidirectional SMC50J100A variant which includes cathode marking. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals or differential buses (e.g., RS-485, CAN FD) without external polarity management. |
| Low dynamic resistance (392 mΩ) | Reduces clamping voltage rise under high-current surges, improving protection margin for downstream 100 V-rated components. |
| High-temperature operation (175 °C) | Eliminates need for thermal derating in compact enclosures or near heat sources such as power MOSFETs or transformers. |
| JEDEC SMC footprint compliance | Ensures drop-in compatibility with existing SMC-based layouts and reflow profiles per J-STD-020 MSL Level 1. |
| UL94 V0 flammability rating | Meets safety requirements for end equipment in industrial and consumer applications where flame propagation must be suppressed. |
Applications
| Industrial Motor Drives | Telecom Power Supplies |
|---|---|
|
Use Scenario: Protection of DC bus inputs against load dump and inductive kickback in variable-frequency drives. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed directly across input terminals upstream of DC-DC converters and gate drivers. Use Value: Withstands 5000 W surges and maintains <0.2 µA leakage at 85 °C ambient - preserving efficiency and preventing false trips during thermal cycling. |
Use Scenario: Surge suppression on -48 V DC distribution lines in central office switching equipment. IC Role / Device Role / Timing Role: Bidirectional shunt protector absorbing lightning-induced transients on telecom power feeds. Use Value: Clamps to ≤179 V at 28 A while operating reliably at −40 °C to +85 °C - ensuring uptime during outdoor cabinet temperature excursions. |
| Automotive Body Control Modules | RS-485 Industrial Networks |
|
Use Scenario: Input protection for LIN/CAN node power rails exposed to battery transients per ISO 7637-2 Pulse 1/2a/5a. IC Role / Device Role / Timing Role: Secondary-level TVS placed after primary LC filters to handle residual spikes that pass through front-end filtering. Use Value: 175 °C Tj rating allows placement near MCU power regulators; bidirectional symmetry supports shared rail designs without polarity errors. |
Use Scenario: Common-mode surge protection on twisted-pair RS-485 data lines in factory automation PLCs. IC Role / Device Role / Timing Role: Line-to-line TVS connected differentially across A/B bus lines to suppress EFT bursts per IEC 61000-4-4. Use Value: Low capacitance (<100 pF at 0 V, per Figure 8) prevents signal integrity degradation at 10 Mbps rates; ±30 kV ESD withstand ensures field reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ100CA | Lower peak power (600 W vs. 5000 W), same 100 V VRM and bidirectional configuration. | Suitable only for low-energy ESD and EFT; cannot replace SMC50J100CA in load-dump or lightning-surge scenarios. | Select SMBJ100CA only when surge energy is limited to <100 mJ and board space requires SMB footprint. |
| 1.5KE100CA | Higher peak power (5000 W), but axial DO-201 package - incompatible with SMT assembly and lacks MSL-1 rating. | Requires manual insertion or wave soldering; unsuitable for high-volume automated production or thermally constrained layouts. | Choose 1.5KE100CA only for prototyping or legacy through-hole designs where reflow compatibility is not required. |
Compared with SMBJ100CA and 1.5KE100CA, SMC50J100CA uniquely combines high-energy surge capability, SMT manufacturability, and extended temperature operation - making it the only option qualified for automotive-grade automated production with full IEC 61000-4-2/4-4 compliance.
Availability
SMC50J100CA is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, automotive body control modules, and RS-485 industrial networks requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for SMC50J100CA 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 microcontroller technologies for industrial, automotive, and consumer markets.
The SMC50J TVS series was developed to address high-energy surge protection needs in space-constrained, thermally demanding applications - emphasizing planar-junction reliability, low leakage, and JEDEC-compliant SMT integration.
FAQ
What is the difference between SMC50J100A and SMC50J100CA?
SMC50J100A is unidirectional with a cathode bar marking and conducts only in reverse bias; SMC50J100CA is bidirectional with no cathode bar and clamps symmetrically for both polarities. Their electrical specs (VRM, VBR, VCL) are identical, but CA is required for AC-coupled or floating signal protection.
Does SMC50J100CA require derating at elevated temperatures?
Yes - peak pulse power decreases with junction temperature, dropping to ~2000 W at 175 °C (per Figure 3). Designers must use the provided αT coefficient (10.7 × 10⁻⁴/°C) to adjust VCL and VBR values for operation above 25 °C, especially in sealed enclosures.
Can SMC50J100CA be used for IEC 61000-4-5 line surge protection?
No - IEC 61000-4-5 specifies combination wave surges (1.2/50 µs voltage, 8/20 µs current) up to 10 kV/10 kA, exceeding SMC50J100CA's 5000 W rating. It is rated for IEC 61000-4-4 (EFT) and IEC 61000-4-2 (ESD); use higher-energy modules (e.g., MOVs or hybrid protectors) for 4-5 compliance.
Is the SMC50J100CA RoHS and REACH compliant?
Yes - it carries STMicroelectronics' ECOPACK2 environmental grade certification, meeting RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006, with lead-free matte tin plating and halogen-free molding compound per IPC-7093 guidelines.
SMC50J100CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-214AB, SMC
- Series:
- SMC50J
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 100V (Max)
- Voltage - Breakdown (Min):
- 111V
- Voltage - Clamping (Max) @ Ipp:
- 179V
- Current - Peak Pulse (10/1000µs):
- 28A
- Power - Peak Pulse:
- 5000W (5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMC
SMC50J100CA FAQ
1.How can I place an order for SMC50J100CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC50J100CA 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 SMC50J100CA reliable?
The price and inventory of SMC50J100CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMC50J100CA is usually 5 days.
3.What payment methods are accepted for SMC50J100CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC50J100CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC50J100CA?
SMC50J100CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC50J100CA 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 SMC50J100CA?
For technical support, including SMC50J100CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC50J100CA requirements.
6.How does Aetrix verify that SMC50J100CA is sourced from the original manufacturer or authorized distributors?
All SMC50J100CA 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 SMC50J100CA meets industry standards.
7.What is the process for return or replacement of SMC50J100CA?
All SMC50J100CA units undergo pre-shipment inspection (PSI). If there is an issue with SMC50J100CA, 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 SMC50J100CA part is unused and in its original packaging.
Return procedure for SMC50J100CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC50J100CA Tags
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onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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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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