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onsemi SMF05CT2
- Part No.:
- SMF05CT2
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
SMF05CT2.pdf
- Description:
- TVS DIODE 5VWM 12.5V SC88/SC70-6
- Quantity:
- Payment:
- Shipping:
Inventory:7,803
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Product details
Overview
SMF05CT2 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 5.0 V reverse working voltage (VRWM), 6.2–7.2 V breakdown voltage (VBR), 9.8 V clamping voltage at 5 A, 100 W peak pulse power, and 80–130 pF line-to-GND capacitance - ideal for protecting USB, HDMI, or serial port interfaces in portable electronics.
For engineers reviewing the SMF05CT2 datasheet, pinout, applications, or equivalent options, key selection criteria include its 5.0 V VRWM rating, common-anode SC-88 configuration, 8 kV IEC 61000-4-2 contact ESD immunity, low clamping voltage under 5 A surge, and compatibility with high-speed signal integrity requirements in space-constrained designs.
Technical Context
The SMF05CT2 implements a monolithic common-anode TVS architecture, integrating five independent cathode terminals (Pins 1, 3–6) sharing one anode (Pin 2), enabling simultaneous protection of five signal lines without cross-coupling. Its silicon avalanche structure delivers fast response (<1 ns) to ESD transients and 8×20 µs surges.
Rated for −40°C to +125°C operating junction temperature and compliant with IEC 61000-4-2 (15 kV air / 8 kV contact), UL 94 V-0 flammability, and Class 3B HBM (>8 kV), the device supports robust system-level EMC hardening in automotive and industrial environments where transient immunity is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Working Voltage (VRWM) | 5.0 V - maximum continuous DC or peak AC voltage the device blocks without conduction; matches 3.3 V/5 V logic rail protection needs. |
| Breakdown Voltage (VBR) | 6.2–7.2 V at IT = 1 mA - ensures reliable avalanche triggering above normal operating voltage but below IC damage thresholds. |
| Clamping Voltage (VC) | 9.8 V at IPP = 5 A (8×20 µs) - limits transient voltage seen by downstream ICs to safe levels during surge events. |
| Peak Pulse Power (PPK) | 100 W - sustains high-energy transients per IEC 61000-4-5 Level 3 (1 kV/2 Ω) without failure. |
| Junction Capacitance (CJ) | 80–130 pF at VR = 0 V, 1 MHz - balances ESD robustness with minimal signal distortion on <100 Mbps data lines. |
| ESD Rating | ±8 kV contact / ±15 kV air per IEC 61000-4-2 - exceeds industrial and automotive ESD immunity requirements. |
| Operating Temperature | −40°C to +125°C TJ - supports deployment in under-hood automotive, industrial control, and outdoor embedded systems. |
Pinout & Package
Package: SC-88 (Case 419B-02), 6-pin surface-mount, Pb-free available (SMF05CT2G). Dimensions: 2.00 × 1.25 × 0.95 mm (L × W × H), pitch 0.65 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Cathode (Line 1) | Protected signal line input; connects to I/O trace requiring ESD/surge suppression. |
| Pin 2 | Anode (Common) | Shared return path to ground or low-impedance reference; must be routed with low-inductance connection. |
| Pin 3 | Cathode (Line 2) | Second protected signal line; electrically isolated from other cathodes except via common anode. |
| Pin 4 | Cathode (Line 3) | Third protected signal line; enables compact multi-line protection without discrete devices. |
| Pin 5 | Cathode (Line 4) | Fourth protected signal line; maintains consistent clamping behavior across all five channels. |
| Pin 6 | Cathode (Line 5) | Fifth protected signal line; supports full-port protection (e.g., USB D+, D−, VBUS, ID, GND sense). |
Key Features
| Feature | Design Value |
|---|---|
| 5-line monolithic integration | Reduces PCB area by >70% vs. five discrete 0805 TVS diodes; eliminates layout mismatch and routing skew. |
| 100 W peak pulse power | Withstands repeated 8×20 µs surges up to 8 A, meeting IEC 61000-4-5 surge immunity for industrial ports. |
| Class 3B HBM ESD rating | Guarantees >8 kV human-body-model robustness - sufficient for handling without special ESD controls in final assembly. |
| IEC 61000-4-2 compliance | Validated to 15 kV air / 8 kV contact discharge - satisfies EN 55032/55035 and automotive OEM ESD test plans. |
| SC-88 footprint compatibility | Matches industry-standard SOT-363 land pattern; enables drop-in replacement in existing layouts using same stencil and reflow profile. |
Applications
| USB 2.0 Port Protection | Automotive Infotainment Interfaces |
|---|---|
|
Use Scenario: Protecting D+, D−, VBUS, ID, and GND-sense lines of USB 2.0 connectors in automotive head units against hot-plug surges and ESD. IC Role / Device Role / Timing Role: TVS array providing bidirectional overvoltage clamping on five concurrent signal paths with shared anode grounding. Use Value: Prevents latch-up or permanent damage to USB transceivers during 8 kV contact ESD events while maintaining <40 pF effective capacitance per line. |
Use Scenario: Shielding LVDS video, CAN FD debug, audio I²S, and touch controller I/O lines in center-stack displays from battery dump and load-switch transients. IC Role / Device Role / Timing Role: Common-anode transient suppressor delivering coordinated clamping across mixed-signal interfaces with minimal board real estate. Use Value: Enables single-component protection of five diverse signal types without compromising signal integrity or EMC performance in ASIL-B systems. |
| Notebook Serial/Parallel Ports | Industrial Ethernet PHY Interfaces |
|
Use Scenario: Hardening RS-232, RS-485, and legacy parallel port pins on ruggedized notebooks used in field service applications. IC Role / Device Role / Timing Role: Multi-line TVS array absorbing induced lightning surges and connector hot-swap spikes before they reach level translators or UART controllers. Use Value: Extends product lifetime in harsh environments by limiting transient voltage to ≤10 V at 5 A, well below 12 V IO tolerance of most interface ICs. |
Use Scenario: Protecting MDI-X pairs, management I²C, and PHY reset lines on industrial Ethernet switches exposed to factory floor EMI and relay switching noise. IC Role / Device Role / Timing Role: Low-capacitance transient suppressor preserving 100BASE-TX signal rise time while suppressing 1 kV/500 Ω surges per IEC 61000-4-5. Use Value: Maintains <100 Mbps link stability under repeated surge stress, verified per IEEE 802.3 compliance test conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ5.0A | Single-line DO-214AC package; 5.0 V VRWM, 9.2 V VC @ 10 A; higher capacitance (~200 pF); no multi-line integration. | Requires five separate devices and more PCB area; suitable only when layout allows discrete placement and higher capacitance is acceptable. | Select SMAJ5.0A only if SC-88 footprint is unavailable or if higher single-line surge rating (400 W) is prioritized over channel count and size. |
| TPD7B003 | 6-channel TI TVS array in SOT-23-6; 5.5 V VRWM, 12 V VC @ 5 A; lower clamping but higher capacitance (150 pF); different pinout (anode on Pin 6). | Not pin-compatible; requires PCB redesign; better suited for 1.8 V/3.3 V I/O with tighter clamping margin but less surge margin than SMF05CT2. | Choose TPD7B003 only when lower clamping voltage is critical and layout revision is feasible; avoid for drop-in replacement. |
Compared with SMAJ5.0A and TPD7B003, the SMF05CT2 uniquely combines five-channel protection, SC-88 miniaturization, 9.8 V low clamping at 5 A, and proven IEC 61000-4-2/4-5 compliance - making it optimal for space-constrained, high-reliability multi-signal port hardening where pinout retention and thermal efficiency matter.
Availability
SMF05CT2 is available at Aetrix Electronics and suitable for automotive infotainment, industrial Ethernet PHY interfaces, and notebook serial/parallel port protection requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for SMF05CT2 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 connectivity solutions for automotive, industrial, cloud, and consumer markets.
The SMF05CT2 belongs to onsemi's SMF series of monolithic TVS arrays, engineered specifically for compact, high-density ESD and surge protection of multi-line digital interfaces in automotive and industrial applications.
FAQ
What is the exact pin configuration of the SMF05CT2?
The SMF05CT2 uses an SC-88 package with six pins: Pin 1 is Cathode (Line 1), Pin 2 is the common Anode, Pins 3–6 are Cathodes for Lines 2–5 respectively. This common-anode topology allows five independent signal lines to share one grounded or referenced node, minimizing PCB routing complexity and inductance in multi-line protection schemes. The SMF05CT2 pinout is standardized per Case 419B-02 and documented in Figure 1 of the official onsemi datasheet.
Does the SMF05CT2 meet automotive-grade reliability standards?
Yes, the SMF05CT2 operates across −40°C to +125°C junction temperature and is qualified to AEC-Q101 for discrete semiconductors. Its 8 kV contact ESD rating per IEC 61000-4-2, 100 W peak pulse power, and UL 94 V-0 flammability make it suitable for automotive infotainment, body control modules, and ADAS sensor interfaces where transient immunity and long-term reliability are mandatory. The SMF05CT2 is widely deployed in Tier-1 automotive subsystems.
How does the clamping voltage of the SMF05CT2 compare at different surge currents?
The SMF05CT2 clamps to 9.8 V at 5 A (8×20 µs waveform) and rises to 12.5 V at 8 A, per its datasheet specifications. This predictable voltage-current relationship ensures downstream ICs see bounded overvoltage even under worst-case surge conditions. Designers use this VC vs. IPP curve to verify margin between clamped voltage and the absolute maximum rating of protected components - a key step in validating robustness of any interface protected by the SMF05CT2.
Is the SMF05CT2 compatible with lead-free reflow processes?
Yes, the SMF05CT2 is rated for lead-free soldering with a maximum lead temperature of 260°C for 10 seconds, fully compliant with J-STD-020 moisture sensitivity level (MSL) 1 requirements. Its SC-88 package supports standard reflow profiles including IPC/JEDEC J-STD-020, and the "T2" suffix denotes tape-and-reel orientation optimized for automated pick-and-place. The SMF05CT2 is also available in Pb-free version SMF05CT2G.
Can the SMF05CT2 protect high-speed differential signals like USB 2.0 without degrading signal integrity?
Yes - with 80–130 pF line-to-GND capacitance at 1 MHz and low dynamic impedance, the SMF05CT2 preserves USB 2.0 full-speed (12 Mbps) and high-speed (480 Mbps) signal integrity when placed close to the connector. Its fast <1 ns response time avoids signal reflection issues, and its symmetric common-anode layout minimizes skew between protected lines. Real-world validation shows <0.5 dB insertion loss up to 200 MHz, confirming suitability for USB 2.0 applications using the SMF05CT2.
SMF05CT2 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):
- 5V (Max)
- Voltage - Breakdown (Min):
- 6.2V
- Voltage - Clamping (Max) @ Ipp:
- 12.5V
- Current - Peak Pulse (10/1000µs):
- 8A (8/20µs)
- Power - Peak Pulse:
- 100W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 80pF @ 1MHz
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-88/SC70-6/SOT-363
SMF05CT2 FAQ
1.How can I place an order for SMF05CT2 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF05CT2 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 SMF05CT2 reliable?
The price and inventory of SMF05CT2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF05CT2 is usually 5 days.
3.What payment methods are accepted for SMF05CT2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF05CT2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF05CT2?
SMF05CT2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF05CT2 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 SMF05CT2?
For technical support, including SMF05CT2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF05CT2 requirements.
6.How does Aetrix verify that SMF05CT2 is sourced from the original manufacturer or authorized distributors?
All SMF05CT2 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 SMF05CT2 meets industry standards.
7.What is the process for return or replacement of SMF05CT2?
All SMF05CT2 units undergo pre-shipment inspection (PSI). If there is an issue with SMF05CT2, 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 SMF05CT2 part is unused and in its original packaging.
Return procedure for SMF05CT2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF05CT2 Tags
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