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onsemi SMF15CT1G
- Part No.:
- SMF15CT1G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
SMF15CT1G.pdf
- Description:
- TVS DIODE 15VWM 29VC SC88/SC70-6
- Quantity:
- Payment:
- Shipping:
Inventory:6,189
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Product details
Overview
SMF15CT1G from onsemi is a 5-line ESD protection diode array in SC-88 package, designed for transient voltage suppression in high-speed data lines. It features 15 V reverse working voltage, 29 V clamping voltage at 5 A pulse, 45 pF line-to-GND capacitance, and IEC 61000-4-2 ±15 kV air/±8 kV contact ESD compliance - deployed in automotive infotainment USB interfaces.
For engineers reviewing the SMF15CT1G datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM ≥ system operating voltage, VC ≤ IC absolute maximum rating, CJ < 50 pF for USB 2.0 signal integrity, and AEC-Q101 qualification for under-hood deployment.
Technical Context
The SMF15CT1G implements a monolithic common-anode TVS architecture with five independent cathodes (Pins 1,3–6) and one shared anode (Pin 2), enabling simultaneous bidirectional clamping across five signal lines without cross-talk. Its silicon avalanche structure delivers sub-nanosecond response to ESD transients while maintaining low leakage (<1 µA at 15 V).
Rated for −40 °C to +125 °C operation and UL 94 V-0 flammability, it supports reflow soldering up to 260 °C (10 s) and meets automotive PPAP requirements when ordered as SZ-prefix variants - though SMF15CT1G itself is standard industrial grade.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Working Voltage (VRWM) | 15 V - must exceed DC/peak operating voltage of protected line (e.g., 12 V automotive bus or 3.3 V/5 V logic rails) |
| Clamping Voltage (VC) | 29 V at 5 A (8 × 20 µs) - ensures downstream ICs with 30 V abs max rating remain within safe margin |
| Junction Capacitance (CJ) | 45 pF max at 0 V, 1 MHz - compatible with USB 2.0 (480 Mbps) and RS-232 but not USB 3.0+ |
| Peak Pulse Current (IPP) | 5.0 A (8 × 20 µs) - defines maximum surge energy (≈100 W peak) the device can absorb without failure |
| ESD Rating (HBM/MM) | 16 kV HBM / 400 V MM - exceeds JEDEC JS-001 Class 3B and qualifies for ruggedized portable electronics |
| IEC 61000-4-2 Compliance | ±15 kV air / ±8 kV contact - satisfies EN 61000-4-2 Level 4 immunity testing for end-equipment certification |
Pinout & Package
SC-88 (Case 419B, Style 24), 2.00 mm × 1.25 mm × 0.90 mm body, 0.65 mm pitch, Pb-free, tape-and-reel (3000 pcs).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode | Protected line 1 - connects to first I/O trace (e.g., USB D+) |
| 2 | Anode | Common reference node - ties to system ground or chassis return path |
| 3 | Cathode | Protected line 2 - e.g., USB D−, CAN_H, or RS-232 TX |
| 4 | Cathode | Protected line 3 - e.g., UART RX, SPI MISO, or audio line |
| 5 | Cathode | Protected line 4 - e.g., UART TX, SPI MOSI, or reset signal |
| 6 | Cathode | Protected line 5 - e.g., SPI SCLK, I²C SDA, or power enable |
Key Features
| Feature | Design Value |
|---|---|
| 5-line monolithic integration | Reduces PCB footprint by >70% vs. discrete diodes; eliminates inter-pin inductance mismatch |
| 100 W peak power dissipation | Sustains 8 × 20 µs surges up to 5 A without thermal runaway or parameter shift |
| UL 94 V-0 flammability rating | Prevents flame propagation during catastrophic overvoltage events in enclosed enclosures |
| Pb-free SC-88 packaging | Enables RoHS-compliant manufacturing and eliminates lead-based solder compatibility concerns |
Applications
| Automotive Infotainment | Industrial Serial Interfaces |
|---|---|
Use Scenario: Protecting USB 2.0 ports in head units against ESD from user insertion and load dump transients. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed between connector and USB transceiver IC. Use Value: Prevents latch-up or gate oxide damage in USB PHY while maintaining <50 pF loading for signal integrity. |
Use Scenario: Shielding RS-232/RS-485 transceivers in PLC backplanes from field-induced surges. IC Role / Device Role / Timing Role: Line-side transient suppressor mounted at connector entry point. Use Value: Limits clamped voltage to <30 V, staying below transceiver's 36 V abs max rating and avoiding false triggering. |
| Notebook I/O Expansion | Networking Equipment |
Use Scenario: Safeguarding SD card slot, HDMI CEC, and SMBus lines in ultrabooks from human-body ESD. IC Role / Device Role / Timing Role: Common-anode array sharing ground return for multi-signal protection. Use Value: Achieves Class 3B HBM (16 kV) and IEC 61000-4-2 (15 kV air) compliance in single 2 mm × 1.25 mm footprint. |
Use Scenario: Guarding Ethernet PHY MDI lines and management interfaces (I²C, JTAG) in switches/routers. IC Role / Device Role / Timing Role: First-stage ESD filter before magnetics and PHY IC input pins. Use Value: Clamps fast-rising ESD pulses within 1 ns while adding <45 pF per line - negligible impact on 100BASE-TX eye diagram. |
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), lower VC (23 V @ 6 A), higher IPP (6 A), lower CJ (60 pF max) | Better suited for 12 V systems (e.g., CAN FD, LIN bus); tighter clamping margin for 13.5 V nominal rails | Select when protecting 12 V tolerant interfaces where lower clamping voltage improves safety margin. |
| SMF24CT1G | Higher VRWM (24 V), higher VC (44 V @ 2.5 A), lower IPP (2.5 A), lower CJ (25 pF max) | Targeted at 24 V industrial controls or PoE-powered devices; reduced capacitance benefits high-speed links | Choose for 24 V systems requiring minimal signal distortion - e.g., Gigabit Ethernet auxiliary lines. |
Compared with SMF12CT1G and SMF24CT1G, the SMF15CT1G provides optimal balance for 15 V nominal buses (e.g., automotive accessory power, industrial 15 V logic rails), delivering 29 V clamping at 5 A while retaining 45 pF capacitance suitable for USB 2.0 and legacy serial protocols.
Availability
SMF15CT1G is available at Aetrix Electronics and suitable for automotive infotainment, industrial serial interfaces, and notebook I/O expansion requiring stable component supply and full traceability.
Supply support for SMF15CT1G 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, analog, sensor, and logic solutions for automotive, industrial, and cloud infrastructure markets.
The SMFxxCT1G series belongs to onsemi's transient voltage suppression portfolio, engineered specifically for compact, high-density ESD protection of multi-line interfaces in space-constrained and reliability-critical applications.
FAQ
What is the maximum operating temperature range for SMF15CT1G?
The SMF15CT1G is rated for junction temperatures from −40 °C to +125 °C, making it suitable for under-hood automotive environments and industrial control cabinets where ambient temperatures exceed 85 °C. This range is validated per the manufacturer's datasheet and applies to continuous operation under specified electrical conditions.
Does SMF15CT1G meet AEC-Q101 qualification?
The SMF15CT1G is not AEC-Q101 qualified; only the SZ-prefix variants (e.g., SZSMF15CT1G) carry that qualification. SMF15CT1G is rated for industrial-grade use and complies with IEC 61000-4-2, UL 94 V-0, and Pb-free standards, but lacks automotive-specific stress testing documentation.
Can SMF15CT1G be used for USB 2.0 data line protection?
Yes - SMF15CT1G's 45 pF max capacitance and 29 V clamping voltage at 5 A align with USB 2.0 signal integrity requirements. It is commonly deployed on D+ and D− lines upstream of the USB transceiver, provided layout minimizes stub length to preserve 480 Mbps eye opening.
What is the meaning of "common anode" in SMF15CT1G's architecture?
"Common anode" means all five cathodes (Pins 1,3–6) connect independently to protected signal lines, while their shared anode (Pin 2) ties to system ground. This configuration enables bidirectional clamping on each line without internal coupling - critical for differential pairs like USB or RS-485.
How does SMF15CT1G compare to discrete TVS diodes in layout efficiency?
SMF15CT1G replaces five discrete 0402 or 0603 TVS diodes with a single SC-88 package, reducing PCB area by ~65%, eliminating five separate ground vias, and removing routing inductance imbalances that degrade multi-line ESD performance. Its monolithic construction ensures matched clamping thresholds across all five channels.
SMF15CT1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- 6-TSSOP, SC-88, SOT-363
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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
SMF15CT1G FAQ
1.How can I place an order for SMF15CT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF15CT1G 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 SMF15CT1G reliable?
The price and inventory of SMF15CT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF15CT1G is usually 5 days.
3.What payment methods are accepted for SMF15CT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF15CT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF15CT1G?
SMF15CT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF15CT1G 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 SMF15CT1G?
For technical support, including SMF15CT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF15CT1G requirements.
6.How does Aetrix verify that SMF15CT1G is sourced from the original manufacturer or authorized distributors?
All SMF15CT1G 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 SMF15CT1G meets industry standards.
7.What is the process for return or replacement of SMF15CT1G?
All SMF15CT1G units undergo pre-shipment inspection (PSI). If there is an issue with SMF15CT1G, 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 SMF15CT1G part is unused and in its original packaging.
Return procedure for SMF15CT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF15CT1G Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
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.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
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