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onsemi SMF24CT1G
- Part No.:
- SMF24CT1G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
SMF24CT1G.pdf
- Description:
- TVS DIODE 24VWM 44VC SC88/SC70-6
- Quantity:
- Payment:
- Shipping:
Inventory:7,985
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Product details
Overview
SMF24CT1G from onsemi is a 5-line ESD and transient voltage protection diode array in SC-88 package, featuring 24 V reverse working voltage, 26.7–32 V breakdown voltage, and 40 V clamping voltage at 1 A (8 × 20 µs), designed for surge protection of high-speed data lines in automotive infotainment interfaces.
For engineers reviewing the SMF24CT1G datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM ≥24 V, low line-to-GND capacitance (21–25 pF), IEC 61000-4-2 ±15 kV air/±8 kV contact compliance, and monolithic common-anode architecture enabling compact 5-line protection.
Technical Context
The SMF24CT1G implements a monolithic common-anode ESD protection structure with five independent cathodes and one shared anode, enabling simultaneous protection of five signal lines without inter-channel coupling. Its design targets fast transient suppression per IEC 61000-4-2 and robust 100 W peak power handling under 8 × 20 µs surges.
It operates across −40 °C to +125 °C junction temperature range and maintains <1.0 µA reverse leakage at VRWM = 24 V, supporting reliable operation in automotive and industrial environments where thermal stability and low standby current are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Working Voltage (VRWM) | 24 V - Maximum continuous DC or peak operating voltage the device blocks without conduction. |
| Breakdown Voltage (VBR) | 26.7–32 V at IT = 1 mA - Threshold at which avalanche conduction begins, defining minimum clamping onset. |
| Clamping Voltage (VC) | 40 V at IPP = 1 A - Maximum voltage seen by protected circuit during 8 × 20 µs surge, limiting stress on downstream ICs. |
| Peak Pulse Current (IPP) | 2.5 A - Maximum non-repetitive surge current the device safely diverts without failure. |
| Junction Capacitance (CJ) | 21–25 pF at VR = 0 V, 1 MHz - Low line-to-GND capacitance preserves signal integrity on USB 2.0 or CAN FD interfaces. |
| ESD Rating | ±15 kV air / ±8 kV contact per IEC 61000-4-2 - Certified immunity level for end-equipment ESD compliance testing. |
| Package | SC-88 (Case 419B, Style 24) - 6-pin surface-mount package with 0.65 mm pitch, footprint-compatible with industry-standard 5-line TVS arrays. |
Pinout & Package
SMF24CT1G uses the SC-88 package (Case 419B, Style 24), a 6-pin, 2.00 × 1.25 × 0.90 mm surface-mount outline with 0.65 mm lead pitch. The monolithic common-anode configuration integrates five cathodes and one shared anode in a single die.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode | Protected signal line #1 - connects to first I/O trace requiring ESD clamping. |
| 2 | Anode | Common return path - ties all five cathodes to system ground or chassis via low-inductance route. |
| 3 | Cathode | Protected signal line #2 - independent clamping node for second high-speed interface line. |
| 4 | Cathode | Protected signal line #3 - enables compact routing for multi-lane serial buses like LVDS or MIPI D-PHY. |
| 5 | Cathode | Protected signal line #4 - supports differential pair or control line protection without cross-talk. |
| 6 | Cathode | Protected signal line #5 - completes full 5-line coverage for interfaces such as USB OTG or automotive LIN bus. |
Key Features
| Feature | Design Value |
|---|---|
| 5-line monolithic common-anode architecture | Reduces PCB area by 60% vs discrete diodes and eliminates inter-channel timing skew in multi-line protection. |
| 100 W peak power dissipation (8 × 20 µs) | Withstands high-energy transients from load dump or inductive switching in 12 V automotive systems. |
| IEC 61000-4-2 ±15 kV air / ±8 kV contact rating | Meets international ESD immunity requirements for CE-marked consumer and industrial equipment. |
| UL 94 V-0 flammability rating | Ensures self-extinguishing behavior under fault conditions, satisfying safety standards for enclosed electronics. |
| Pb-free SC-88 package | Complies with RoHS Directive 2011/65/EU and supports lead-free reflow soldering at 260 °C for 10 s. |
Applications
| Automotive Infotainment Interfaces | USB 2.0 Data Lines |
|---|---|
Use Scenario: Protecting HDMI, LVDS, or FPD-Link III video signal lines in head unit displays against ESD events during assembly and field use. IC Role / Device Role / Timing Role: Bidirectional transient voltage suppressor placed between connector and SoC PHY, clamping surges before they reach sensitive input buffers. Use Value: 21–25 pF capacitance avoids signal rise-time degradation on 1.65 Gbps links, while 40 V clamping prevents latch-up in 3.3 V receiver inputs. |
Use Scenario: Safeguarding D+ and D− lines of USB 2.0 host/device ports in notebooks and docking stations against human-body ESD. IC Role / Device Role / Timing Role: Common-anode dual-cathode clamp integrated into USB connector subcircuit, sharing ground return with VBUS decoupling. Use Value: 24 V VRWM exceeds USB 2.0 VBUS tolerance margin, and ±15 kV air discharge rating satisfies IEC 61000-4-2 Level 4 compliance. |
| Industrial CAN FD Networks | Serial Communication Ports (RS-232/RS-485) |
Use Scenario: Shielding CAN_H and CAN_L differential pairs in vehicle ECUs and telematics modules from coupled transients on 24 V battery rails. IC Role / Device Role / Timing Role: Line-to-ground TVS array mounted at connector entry point, with cathodes tied to CAN lines and anode to chassis ground. Use Value: 2.5 A IPP and 100 W peak power handle ISO 7637-2 pulse 1/2a surges; 24 V VRWM matches nominal CAN FD supply domain. |
Use Scenario: Securing RS-232 TX/RX/CTS/RTS/DSR lines in programmable logic controllers and HMI panels exposed to factory-floor ESD. IC Role / Device Role / Timing Role: Five-cathode array assigned to five independent control/data lines, leveraging shared anode for minimal ground loop inductance. Use Value: 40 V clamping at 1 A ensures protected transceivers remain within absolute maximum ratings during 8 kV contact discharge events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMF12CT1G | Lower VRWM (12 V), higher capacitance (40–60 pF), lower clamping (21 V @ 3 A) | Better suited for 3.3 V/5 V logic interfaces; not rated for 24 V supply domains | Select when protecting low-voltage digital I/O where tighter clamping and higher surge current are prioritized over voltage range. |
| TPD4E05U06DQAR | 4-line array, 5.5 V VRWM, 0.5 pF typical capacitance, ±12 kV IEC 61000-4-2 | Optimized for ultra-high-speed interfaces (USB 3.0, HDMI 2.0); lacks 24 V blocking capability | Choose for >5 Gbps serial links where sub-1 pF capacitance is mandatory, accepting reduced voltage rating and line count. |
Compared with SMF12CT1G and TPD4E05U06DQAR, the SMF24CT1G uniquely balances 24 V operating margin, 5-line integration, and 21–25 pF capacitance-making it the only option among the three qualified for 24 V automotive signal protection without derating or redesign.
Availability
SMF24CT1G is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial CAN FD networks, USB 2.0 peripheral designs, and serial communication port protection requiring stable component supply and long-term lifecycle support.
Supply support for SMF24CT1G 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
onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power management, analog, sensor, and ESD protection solutions for automotive, industrial, and computing markets.
The SMF24CT1G belongs to onsemi's SMFxxC family of monolithic multi-line TVS diodes, engineered specifically for compact, high-reliability transient suppression in space-constrained automotive and industrial electronics.
FAQ
What is the maximum clamping voltage of the SMF24CT1G under surge conditions?
The SMF24CT1G exhibits a clamping voltage of 40 V at 1 A peak pulse current (8 × 20 µs waveform) and 44 V at 2.5 A. These values represent the maximum voltage imposed on protected lines during standardized surge events, ensuring downstream 3.3 V or 5 V ICs remain within safe operating limits without latch-up or damage.
Does the SMF24CT1G meet automotive qualification standards?
Yes, the SMF24CT1G is AEC-Q101 qualified and PPAP capable. It meets automotive-grade reliability requirements including operating junction temperature from −40 °C to +125 °C, robust ESD performance per IEC 61000-4-2 (±15 kV air, ±8 kV contact), and UL 94 V-0 flammability rating-making it suitable for under-hood and cabin electronics.
How many signal lines does the SMF24CT1G protect, and what is its pin configuration?
The SMF24CT1G protects five independent signal lines using a monolithic common-anode SC-88 package (Style 24). Pin 2 is the shared anode; pins 1, 3, 4, 5, and 6 are individual cathodes-each connecting to one protected line while referencing the same ground return path.
Can the SMF24CT1G be used in USB 2.0 applications?
Yes, the SMF24CT1G is suitable for USB 2.0 data line protection. Its 21–25 pF line-to-GND capacitance avoids signal integrity degradation at 480 Mbps, and its 24 V VRWM provides ample margin above USB VBUS. The 40 V clamping voltage at 1 A ensures safe operation for 3.3 V transceivers during ESD events.
What is the peak pulse current rating of the SMF24CT1G?
The SMF24CT1G has a maximum peak pulse current (IPP) rating of 2.5 A under the standard 8 × 20 µs double-exponential waveform. This defines the highest transient current the device can safely divert without parametric shift or catastrophic failure, aligning with IEC 61000-4-5 surge test levels for protected interfaces.
SMF24CT1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- 6-TSSOP, SC-88, SOT-363
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 5
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 24V (Max)
- Voltage - Breakdown (Min):
- 26.7V
- Voltage - Clamping (Max) @ Ipp:
- 44V
- Current - Peak Pulse (10/1000µs):
- 2.5A (8/20µs)
- Power - Peak Pulse:
- 100W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 21pF @ 1MHz
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-88/SC70-6/SOT-363
SMF24CT1G FAQ
1.How can I place an order for SMF24CT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF24CT1G 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 SMF24CT1G reliable?
The price and inventory of SMF24CT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF24CT1G is usually 5 days.
3.What payment methods are accepted for SMF24CT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF24CT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF24CT1G?
SMF24CT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF24CT1G 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 SMF24CT1G?
For technical support, including SMF24CT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF24CT1G requirements.
6.How does Aetrix verify that SMF24CT1G is sourced from the original manufacturer or authorized distributors?
All SMF24CT1G 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 SMF24CT1G meets industry standards.
7.What is the process for return or replacement of SMF24CT1G?
All SMF24CT1G units undergo pre-shipment inspection (PSI). If there is an issue with SMF24CT1G, 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 SMF24CT1G part is unused and in its original packaging.
Return procedure for SMF24CT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF24CT1G Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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ESD5Z3.3T1G
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D5V0H1B2LP-7B
Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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DESD5V0U1BA-7
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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PESD2V0Y1BSFYL
Nexperia USA Inc.
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DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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D5V0L1B2WS-7
Diodes Incorporated
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