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STMicroelectronics SMC30J26CA
- Part No.:
- SMC30J26CA
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC30J26CA.pdf
- Description:
- TVS DIODE 26VWM 42.1VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:2,548
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Product details
Overview
SMC30J26CA from STMicroelectronics is a bidirectional 3000 W transient voltage suppression (TVS) diode designed for high-energy ESD and surge protection in power rails and signal lines. It features a standoff voltage (VRM) of 26 V, clamping voltage (VCL) of 42.1 V at 71 A (10/1000 µs), junction temperature rating up to +175 °C, and ultra-low leakage current of 0.2 µA at 25 °C - enabling robust protection in industrial power supplies and automotive body electronics.
For engineers reviewing the SMC30J26CA datasheet, SMC30J26CA pinout, SMC30J26CA application, or SMC30J26CA equivalent, key selection criteria include bidirectional surge capability, low dynamic resistance (34.5 mΩ), IEC 61000-4-2 ±30 kV contact/air discharge compliance, and JEDEC-standard SMC package compatibility with high-reliability PCB layouts.
Technical Context
This TVS diode employs planar silicon avalanche technology optimized for fast response (<1 ns) to electrostatic discharge and repetitive surges. Its bidirectional architecture provides symmetrical clamping in both polarities without requiring polarity-aware placement, supporting AC-coupled interfaces and floating bus lines.
The device delivers 3000 W peak pulse power (10/1000 µs) and up to 40 kW (8/20 µs), with thermal derating down to ~1500 W at Tj = 125 °C per Figure 3. Its low dynamic resistance (34.5 mΩ) and tight VBR tolerance (28.9–31.9 V) ensure predictable clamping behavior under real-world surge transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 µs) | 3000 W - sustains repeated 3 kA surges without degradation in industrial motor drives |
| Standoff Voltage (VRM) | 26 V - blocks normal operation up to 26 V DC while triggering above 28.9 V |
| Clamping Voltage (VCL) | 42.1 V at 71 A - limits downstream voltage to safe level during 10/1000 µs surge |
| Leakage Current (IRM) | 0.2 µA at 25 °C - negligible standby power loss in battery-backed systems |
| Junction Temperature Range | −55 °C to +175 °C - supports under-hood automotive and industrial ambient conditions |
| ESD Rating (IEC 61000-4-2) | ±30 kV air/contact discharge - exceeds Level 4 for front-panel and connector protection |
| Dynamic Resistance (RD) | 34.5 mΩ - minimizes voltage overshoot during fast-rising transients |
Pinout & Package
SMC30J26CA is housed in a JEDEC-standard SMC (DO-214AB) surface-mount package with matte tin-plated leads, compatible with IPC-7531 footprint and reflow soldering per J-STD-020 MSL Level 1. The bidirectional configuration has no anode/cathode designation - both terminals are electrically symmetric.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Cathode) | Bidirectional surge path terminal | Identical electrical role in both directions; connects to protected line and common reference (e.g., chassis ground or power return) |
| Cathode (Anode) | Bidirectional surge path terminal | Electrically interchangeable with Pin 1; enables polarity-agnostic PCB layout and eliminates orientation errors |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., RS-485), and floating power domains without polarity constraints |
| Low dynamic resistance (34.5 mΩ) | Reduces clamping voltage rise under high-current surges, improving margin for 3.3 V/5 V/24 V ICs downstream |
| 175 °C operating junction temperature | Supports placement near heat sources (e.g., MOSFETs, inductors) in compact SMPS and motor control modules |
| UL94 V-0 flammability rating | Meets safety requirements for enclosed industrial enclosures and automotive junction boxes |
| JEDEC SMC outline compliance | Ensures mechanical interoperability with automated pick-and-place equipment and standard reflow profiles |
Applications
| Industrial Power Supply Input | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: 24 V DC input rail exposed to load dump and ISO 7637-2 pulses in programmable logic controllers. IC Role / Device Role / Timing Role: Primary overvoltage clamp protecting upstream DC-DC controller and downstream microcontroller power domain. Use Value: Clamps 3000 W surges to ≤42.1 V within nanoseconds, preventing latch-up or burnout of 36 V-rated regulators and gate drivers. |
Use Scenario: LIN bus transceiver and sensor inputs subjected to ESD events during vehicle assembly and service. IC Role / Device Role / Timing Role: Secondary-level ESD suppressor placed directly at connector interface before transceiver IC. Use Value: Withstands ±30 kV contact discharge per IEC 61000-4-2 while adding <10 pF capacitance, preserving LIN signal integrity up to 20 kbps. |
| RS-485 Communication Port | Smart Energy Meter Voltage Sensing |
Use Scenario: Half-duplex RS-485 transceivers connected to long outdoor cables vulnerable to lightning-induced surges. IC Role / Device Role / Timing Role: Bidirectional line protector on A/B differential pair, referenced to signal ground. Use Value: Symmetrical clamping ensures equal protection for both polarities, maintaining common-mode rejection and preventing transceiver damage during 4 kV EFT (IEC 61000-4-4 Level 4). |
Use Scenario: High-impedance voltage divider feeding ADC in revenue-grade electricity meters measuring 230 V AC mains. IC Role / Device Role / Timing Role: Overvoltage limiter on divider output to protect 3.3 V SAR ADC input from transient coupling. Use Value: 0.2 µA leakage avoids measurement offset error; 42.1 V clamping prevents ADC saturation during 6 kV surge tests per IEC 61000-4-5. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ26CA (Littelfuse) | Lower peak power (600 W), higher VCL (45.7 V @ 13.1 A), SMB package (smaller thermal mass) | Limited to lower-energy surges; unsuitable for 3000 W IEC 61000-4-4 testing | Select only for space-constrained consumer electronics where 600 W surge immunity suffices |
| P6SMB26CA (ON Semiconductor) | Same SMC package, identical VRM/VCL specs, but higher IRM (1 µA) and lower Tj max (+150 °C) | Reduced reliability in high-temp environments; may drift in leakage-sensitive precision sensing | Acceptable for commercial-grade applications below 125 °C ambient, but not for automotive or industrial thermal cycling |
Compared with SMC30J26CA, SMBJ26CA offers smaller footprint but sacrifices >80% peak surge capacity, while P6SMB26CA matches form-factor and basic ratings yet lacks the 175 °C junction rating and sub-0.5 µA leakage critical for long-life industrial deployments.
Availability
SMC30J26CA is available at Aetrix Electronics and suitable for industrial power supply input protection, automotive body control modules, RS-485 communication ports, and smart energy meter voltage sensing requiring stable component supply across extended product lifecycles.
Supply support for SMC30J26CA 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 SMC30J TVS series targets high-reliability surge protection in harsh environments, emphasizing planar technology for low leakage, high-temperature stability, and compatibility with modern SMPS and automotive ECUs.
FAQ
What is the maximum surge current SMC30J26CA can handle?
SMC30J26CA withstands a peak pulse current of 71 A under the standard 10/1000 µs waveform, corresponding to its 3000 W rating. For the 8/20 µs waveform, it supports up to 144 A - verified per Table 2 in DS8598 Rev 8 - making it suitable for IEC 61000-4-5 combination wave testing in industrial equipment.
Is SMC30J26CA RoHS and REACH compliant?
Yes, SMC30J26CA is manufactured in STMicroelectronics' ECOPACK2-compliant facilities and meets RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. Its matte tin lead finish and halogen-free molding compound are documented in ST's official environmental compliance reports.
How does SMC30J26CA differ from unidirectional SMC30J26A?
SMC30J26CA is bidirectional with symmetrical breakdown in both polarities, ideal for AC lines and differential buses; SMC30J26A is unidirectional, conducting only in reverse bias and requiring correct orientation. Their VBR, VCL, and power ratings are identical, but CA version eliminates polarity-dependent layout constraints.
Can SMC30J26CA be used in parallel for higher surge handling?
No - ST does not recommend paralleling SMC30J26CA devices due to parameter mismatch (VBR tolerance ±5%) causing current imbalance and premature failure. For higher surge capacity, select a higher-rated part like SMC30J33CA or use staged protection with upstream MOVs and downstream TVS diodes.
SMC30J26CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-214AB, SMC
- Series:
- SMC30J
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 26V
- Voltage - Breakdown (Min):
- 28.9V
- Voltage - Clamping (Max) @ Ipp:
- 42.1V
- Current - Peak Pulse (10/1000µs):
- 71A
- Power - Peak Pulse:
- 3000W (3kW)
- 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
SMC30J26CA FAQ
1.How can I place an order for SMC30J26CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC30J26CA 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 SMC30J26CA reliable?
The price and inventory of SMC30J26CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMC30J26CA is usually 5 days.
3.What payment methods are accepted for SMC30J26CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC30J26CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC30J26CA?
SMC30J26CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC30J26CA 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 SMC30J26CA?
For technical support, including SMC30J26CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC30J26CA requirements.
6.How does Aetrix verify that SMC30J26CA is sourced from the original manufacturer or authorized distributors?
All SMC30J26CA 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 SMC30J26CA meets industry standards.
7.What is the process for return or replacement of SMC30J26CA?
All SMC30J26CA units undergo pre-shipment inspection (PSI). If there is an issue with SMC30J26CA, 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 SMC30J26CA part is unused and in its original packaging.
Return procedure for SMC30J26CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC30J26CA Tags
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ESD9B5.0ST5G
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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onsemi
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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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