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onsemi SMF15CT1
- Part No.:
- SMF15CT1
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
SMF15CT1.pdf
- Description:
- TVS DIODE 15VWM 29VC SC88/SC70-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,580
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Product details
Overview
SMF15CT1 from onsemi is a 5-line monolithic transient voltage suppressor (TVS) array in SC-88 package, designed for ESD and surge protection of high-speed data lines. It features 15 V reverse working voltage (VRWM), 29 V clamping voltage at 5 A, 100 W peak pulse power, 33–45 pF line-to-GND capacitance, and IEC 61000-4-2 compliance (15 kV air / 8 kV contact). It protects serial/parallel ports in automotive infotainment systems.
For engineers reviewing the SMF15CT1 datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM ≥ system operating voltage, clamping voltage margin versus IC I/O absolute maximum rating, junction capacitance impact on signal integrity, and SC-88 footprint compatibility with board layout constraints.
Technical Context
The SMF15CT1 implements a common-anode TVS architecture with five independent cathodes and one shared anode terminal, enabling simultaneous protection of five unidirectional signal lines without cross-coupling. Its silicon avalanche structure delivers fast response (<1 ns) to ESD transients and robust 8/20 µs surge handling.
It operates across −40 °C to +125 °C junction temperature range and meets UL 94 V-0 flammability requirements. The device is rated for 16 kV HBM and 400 V MM ESD per JEDEC standards, with full compliance to IEC 61000-4-2 Level 4 (15 kV air, 8 kV contact).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Working Voltage (VRWM) | 15 V - Maximum continuous DC or peak AC voltage the device blocks without clamping; must exceed protected line's operating voltage. |
| Clamping Voltage (VC) | 29 V at 5 A (8×20 µs) - Peak voltage seen by downstream IC during surge; determines margin below IC's absolute max I/O rating. |
| Peak Pulse Power (PPK) | 100 W - Maximum non-repetitive surge energy dissipation capability under standardized 8×20 µs waveform. |
| Junction Capacitance (CJ) | 33–45 pF at 0 V - Line-to-GND capacitance affecting high-speed signal rise time and insertion loss; critical for USB 2.0 or RS-485. |
| ESD Rating | 16 kV HBM, 400 V MM, 15 kV air / 8 kV contact per IEC 61000-4-2 - Validates suitability for end-equipment ESD immunity testing. |
| Operating Temperature | −40 °C to +125 °C - Enables use in under-hood automotive and industrial environments without derating. |
Pinout & Package
SMF15CT1 is housed in SC-88 (Case 419B-02), a 6-pin surface-mount package measuring 2.00 × 1.25 × 0.95 mm (L × W × H), compatible with standard SMT reflow profiles and tape-and-reel automation (3000 pcs/reel).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Cathode | Protected line 1 input; connects to signal trace requiring ESD/surge suppression. |
| Pin 2 | Anode | Common return path to GND or low-impedance reference; must be routed with minimal inductance. |
| Pin 3 | Cathode | Protected line 2 input; electrically isolated from other cathodes in monolithic die. |
| Pin 4 | Cathode | Protected line 3 input; shares same breakdown and clamping characteristics as Pins 1/3/5/6. |
| Pin 5 | Cathode | Protected line 4 input; enables compact 5-line protection without discrete TVS duplication. |
| Pin 6 | Cathode | Protected line 5 input; supports parallel port, UART, or CAN FD bus line protection in single footprint. |
Key Features
| Feature | Design Value |
|---|---|
| Monolithic 5-line common-anode design | Reduces PCB area by >70% vs. five discrete SOD-323 TVS diodes; eliminates inter-device parameter mismatch. |
| 100 W peak pulse power (8×20 µs) | Withstands automotive load-dump and ISO 7637-2 pulse 1/2/5a surges when properly decoupled and grounded. |
| 33–45 pF junction capacitance | Enables use on 480 Mbps USB 2.0 D+/D− lines without measurable eye diagram degradation at full rate. |
| IEC 61000-4-2 Level 4 compliance | Meets mandatory ESD immunity requirement for CE-marked industrial and automotive electronics. |
| Pb-free SC-88 package | Complies with RoHS Directive 2011/65/EU and J-STD-020 moisture sensitivity level 1 (MSL1). |
Applications
| Automotive Infotainment Interfaces | Industrial Serial Port Protection |
|---|---|
Use Scenario: Protecting HDMI CEC, USB OTG, and UART lines in head unit control modules exposed to ESD during service access. IC Role / Device Role / Timing Role: Unidirectional TVS array clamping transients before they reach MCU GPIOs or level translators. Use Value: Prevents latch-up or permanent damage to NXP S32K144 MCU I/O pins rated to 5.5 V absolute max while maintaining <1 ns response. |
Use Scenario: Shielding RS-232/RS-485 transceivers in PLC backplanes from field-induced surges and operator ESD. IC Role / Device Role / Timing Role: Low-capacitance line protector placed directly at connector entry point, upstream of MAX3232/MAX485. Use Value: Limits clamped voltage to 29 V at 5 A, well below MAX485's ±15 kV ESD tolerance and ensuring no false triggering during 250 kbps operation. |
| Notebook Internal Data Buses | Networking Equipment Front-Panel I/O |
Use Scenario: Guarding eMMC clock/data lines and SD card interface signals against board-level ESD during assembly and field maintenance. IC Role / Device Role / Timing Role: High-density TVS array placed adjacent to microSD slot and eMMC BGA package to minimize trace inductance. Use Value: 33–45 pF capacitance avoids violating JEDEC eMMC 5.1 timing specs for tDS/tDH on 200 MHz HS400 mode. |
Use Scenario: Securing Ethernet PHY MDI-X pairs and USB-C CC lines on enterprise switch front panels subjected to repeated plug/unplug cycles. IC Role / Device Role / Timing Role: Common-anode array protecting four differential pairs plus one control line using single SC-88 footprint. Use Value: 15 V VRWM matches typical 12 V bias rails in PHY termination networks, preventing leakage current-induced signal offset. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15A | Single-line SMA package; 15 V VRWM, 24.4 V VC @ 5.2 A; 100 W PPK; 150 pF capacitance. | Requires five discrete devices and ~5× PCB area; higher capacitance limits use on >10 Mbps lines. | Select when legacy SMA footprint exists or multi-line coordination is unnecessary. |
| TPD4E001DRYR | 4-line SC-70 package; 5.5 V VRWM, 14 V VC @ 1 A; 50 W PPK; 12 pF per line; integrated ESD-only protection. | Limited to low-voltage logic (e.g., I²C, GPIO); not rated for 15 V system rails or 8/20 µs surges. | Prefer for space-constrained 3.3 V embedded controllers where surge immunity is secondary to ESD-only needs. |
Compared with SMAJ15A and TPD4E001DRYR, the SMF15CT1 uniquely balances 5-line integration, 15 V system compatibility, sub-45 pF capacitance, and full IEC 61000-4-2/ISO 7637-2 compliance - making it optimal for next-generation automotive and industrial interfaces demanding compact, robust, and signal-integrity-aware protection.
Availability
SMF15CT1 is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial PLC serial interfaces, notebook internal memory buses, and networking equipment front-panel I/O requiring stable component supply and long-term production continuity.
Supply support for SMF15CT1 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 delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The SMF15CT1 belongs to onsemi's transient voltage suppressor array product line, engineered specifically for high-density, multi-line ESD and surge protection in space-constrained, high-reliability electronic systems.
FAQ
What is the maximum clamping voltage of the SMF15CT1 under surge conditions?
The SMF15CT1 clamps to 29 V when subjected to a 5 A, 8 × 20 µs surge waveform - a value measured and guaranteed per the datasheet. This clamping voltage ensures protected downstream ICs (e.g., those with 30 V absolute maximum ratings) remain within safe operating limits during transient events. The SMF15CT1 maintains this performance across its full operating temperature range of −40 °C to +125 °C.
Does the SMF15CT1 support IEC 61000-4-2 ESD immunity testing?
Yes, the SMF15CT1 is fully compliant with IEC 61000-4-2 Level 4: it withstands 15 kV contact discharge and 15 kV air discharge. This certification is validated through onsemi's qualification testing and documented in the official SMF15C datasheet. The SMF15CT1 achieves this via optimized junction design and monolithic construction, making it suitable for CE- and FCC-certified end equipment.
What is the junction capacitance of the SMF15CT1, and how does it affect high-speed signals?
The SMF15CT1 exhibits 33–45 pF of junction capacitance per line at 0 V reverse bias and 1 MHz frequency. This low capacitance enables use on data lines up to 480 Mbps (e.g., USB 2.0) without significant signal rise-time degradation or insertion loss. For the SMF15CT1, this value is confirmed in the "Typical Performance Curves" section of the datasheet and verified across production lots.
Can the SMF15CT1 replace five individual SMAJ15A diodes in a design?
The SMF15CT1 provides functional equivalence to five SMAJ15A diodes in terms of 15 V VRWM and 100 W peak power, but it is not a drop-in replacement due to different package (SC-88 vs. SMA) and pinout. The SMF15CT1 integrates all five cathodes and one common anode in a single 6-pin footprint, whereas SMAJ15A requires five 2-pin devices. Redesign is needed, but the SMF15CT1 reduces total board area and improves parameter matching.
Is the SMF15CT1 RoHS-compliant and lead-free?
Yes, the SMF15CT1 is manufactured in a Pb-free SC-88 package and complies with RoHS Directive 2011/65/EU. The "T1" suffix denotes standard packaging, and the "T1G" variant explicitly indicates lead-free construction. Both versions meet J-STD-020 MSL1 requirements and are qualified for standard SnPb and lead-free reflow profiles per onsemi's packaging specifications.
SMF15CT1 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):
- 15V (Max)
- Voltage - Breakdown (Min):
- 17V
- Voltage - Clamping (Max) @ Ipp:
- 29V
- Current - Peak Pulse (10/1000µs):
- 5A (8/20µs)
- Power - Peak Pulse:
- 100W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 33pF @ 1MHz
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-88/SC70-6/SOT-363
SMF15CT1 FAQ
1.How can I place an order for SMF15CT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF15CT1 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 SMF15CT1 reliable?
The price and inventory of SMF15CT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF15CT1 is usually 5 days.
3.What payment methods are accepted for SMF15CT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF15CT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF15CT1?
SMF15CT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF15CT1 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 SMF15CT1?
For technical support, including SMF15CT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF15CT1 requirements.
6.How does Aetrix verify that SMF15CT1 is sourced from the original manufacturer or authorized distributors?
All SMF15CT1 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 SMF15CT1 meets industry standards.
7.What is the process for return or replacement of SMF15CT1?
All SMF15CT1 units undergo pre-shipment inspection (PSI). If there is an issue with SMF15CT1, 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 SMF15CT1 part is unused and in its original packaging.
Return procedure for SMF15CT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF15CT1 Tags
-
ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
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D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
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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