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onsemi SMF05T1
- Part No.:
- SMF05T1
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
SMF05T1.pdf
- Description:
- TVS DIODE 5VWM 12.5VC SC88A
- Quantity:
- Payment:
- Shipping:
Inventory:2,788
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Product details
Overview
SMF05T1 from onsemi is a quad unidirectional ESD protection diode array in SC-88A (SOT-353) package, featuring 6.0–7.2 V breakdown voltage at 1 mA, ≤5 µA leakage at 5 V, 90 pF typical capacitance, and 9.5 V max clamping voltage at 1 A peak pulse current. It protects four I/O lines in space-constrained consumer electronics such as smartphones and medical monitors.
For engineers reviewing the SMF05T1 datasheet, pinout, applications, or equivalent options, key selection criteria include IEC 61000-4-2 ±16 kV air/±9 kV contact ESD compliance, low clamping voltage for signal integrity preservation, SC-88A footprint compatibility, and discontinuation status requiring supply-chain planning.
Technical Context
The SMF05T1 implements a common-anode quad unidirectional TVS architecture with four independent cathodes and one shared anode terminal, enabling simultaneous protection of four data or control lines without cross-coupling. Its silicon avalanche junction design delivers fast response (<1 ns) to ESD transients while maintaining low dynamic impedance under surge conditions.
It operates within −55 °C to +150 °C junction temperature range and supports peak pulse power dissipation of 200 W (8/20 µs waveform), with thermal derating above 25 °C ambient per Figure 3. The device is rated for 260 °C lead soldering and meets Pb-free assembly requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage | 6.0–7.2 V @ 1 mA - defines minimum trigger threshold for ESD clamping activation |
| Max Clamping Voltage | 9.5 V @ 1 A IPP - limits line voltage during transient to protect downstream IC inputs |
| Leakage Current | <5 µA @ 5 V - ensures negligible DC loading on high-impedance signal paths |
| Junction Capacitance | 90 pF TYP @ 0 V - preserves signal integrity for <100 MHz digital interfaces |
| ESD Rating | ±16 kV air / ±9 kV contact per IEC 61000-4-2 - certifies robustness against human-body-model discharges |
| Package | SC-88A (SOT-353), 5-pin - enables high-density layout with 1.25 mm × 2.1 mm footprint |
| Peak Pulse Power | 200 W @ 8/20 µs - sustains single-event surge energy without degradation |
Pinout & Package
SMF05T1 uses the SC-88A (SOT-353) thermoset plastic package with void-free transfer-molded construction, corrosion-resistant finish, and optimized geometry for automated placement. Pin assignment follows Style 5 per onsemi mechanical drawing CASE 419A-02.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode 1 | Protected line 1 return path; connects to I/O trace needing ESD suppression |
| 2 | Common Anode | Shared surge current sink node; ties to ground plane or low-impedance GND |
| 3 | Cathode 2 | Protected line 2 return path; electrically isolated from Cathode 1 |
| 4 | Cathode 3 | Protected line 3 return path; independent clamping action per channel |
| 5 | Cathode 4 | Protected line 4 return path; enables four-line protection in single 5-pin footprint |
Key Features
| Feature | Design Value |
|---|---|
| Quad unidirectional configuration | Four independent cathodes + one common anode enable discrete line protection without shared cathode coupling |
| Low clamping voltage | 9.5 V max at 1 A ensures logic-level interfaces (e.g., USB 2.0, I²C) remain within safe operating margin |
| Low capacitance | 90 pF typical minimizes signal distortion and timing skew on high-speed data lines |
| IEC 61000-4-2 compliance | Validated ±16 kV air / ±9 kV contact rating eliminates need for external ESD test validation |
| SC-88A packaging | 1.25 mm × 2.1 mm footprint reduces PCB area by >50% vs. discrete diode solutions for quad protection |
Applications
| USB 2.0 Data Lines | Medical Sensor Interfaces |
|---|---|
Use Scenario: Protecting D+ and D− differential pair plus VBUS and ID pins in portable diagnostic devices. IC Role / Device Role / Timing Role: ESD transient suppressor placed directly at connector entry point before USB PHY. Use Value: 90 pF capacitance avoids signal integrity loss across 480 Mbps data rate; 9.5 V clamping prevents PHY latch-up. | Use Scenario: Shielding analog front-end inputs (ECG, SpO₂) from electrostatic discharge during clinical handling. IC Role / Device Role / Timing Role: Low-leakage (<5 µA) clamp preventing baseline drift and ADC offset errors. Use Value: Sub-µA leakage maintains high input impedance (>1 GΩ) required for biopotential amplification accuracy. |
| Smartphone Button Inputs | Industrial HMI Keypads |
Use Scenario: Guarding mechanical/virtual button traces exposed on bezel edges prone to finger discharge. IC Role / Device Role / Timing Role: Fast-response (sub-ns) TVS absorbing HBM-like events before MCU GPIO damage. Use Value: ±16 kV air discharge rating exceeds IEC 61000-4-2 Level 4 requirement for handheld consumer products. | Use Scenario: Securing membrane keypad scan lines in factory-floor HMIs subject to operator ESD in dry environments. IC Role / Device Role / Timing Role: Common-anode architecture simplifies grounding to chassis GND while protecting four scan channels. Use Value: SC-88A package allows routing all four protected lines beneath single component, reducing layer count. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ESDA6V1SC6 | Lower capacitance (30 pF), higher leakage (10 µA), same SC-70-6 package | Better suited for >100 MHz RF lines; less ideal for ultra-low-leakage analog sensors | Select when signal bandwidth >200 MHz dominates over leakage sensitivity |
| TPD4E001DPYR | Higher clamping (12 V), lower ESD rating (±8 kV contact), same 5-pin SOT-553 footprint | Marginally compliant with IEC 61000-4-2; requires additional system-level validation | Choose only if legacy board layout mandates identical pinout and cost is primary constraint |
Compared with ESDA6V1SC6 and TPD4E001DPYR, the SMF05T1 provides optimal balance of low clamping (9.5 V), moderate capacitance (90 pF), and full IEC 61000-4-2 certification-making it preferred for mid-speed digital and precision analog interfaces where both surge suppression and DC loading matter.
Availability
SMF05T1 is available at Aetrix Electronics and suitable for USB interface protection, medical sensor front-ends, and industrial HMI keypad designs requiring stable component supply despite its discontinued status.
Supply support for SMF05T1 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 SMF05T1 belongs to onsemi's transient voltage suppression diode family, engineered specifically for board-level ESD protection in space-constrained portable electronics with certified IEC 61000-4-2 performance.
FAQ
Is SMF05T1 still in production?
No, the SMF05T1 is officially marked as discontinued per onsemi's September 2025 datasheet revision. However, Aetrix Electronics maintains active inventory and supports legacy design continuity through controlled allocation and lifecycle coordination services for customers relying on this part.
What is the pin configuration of SMF05T1?
The SMF05T1 uses Style 5 pinout in SC-88A package: Pin 1 = Cathode 1, Pin 2 = Common Anode, Pin 3 = Cathode 2, Pin 4 = Cathode 3, Pin 5 = Cathode 4. This common-anode quad arrangement enables independent protection of four signal lines with shared ground reference.
Does SMF05T1 meet IEC 61000-4-2 standards?
Yes, the SMF05T1 is explicitly rated for ±16 kV air discharge and ±9 kV contact discharge per IEC 61000-4-2. This certification is verified in onsemi's official datasheet and applies directly to the SMF05T1 device, not just the family.
Can SMF05T1 be used for bidirectional signal lines like RS-485?
No, the SMF05T1 is unidirectional only (common-anode configuration). It cannot clamp positive transients on lines referenced to VCC. For bidirectional protection, a dual-rail TVS array such as SMAJ5.0A or dedicated bidirectional ESD diode like ESD7L5.0DT5G is required instead of SMF05T1.
What is the maximum operating temperature for SMF05T1?
The SMF05T1 has a specified operating junction temperature range of −55 °C to +150 °C and a maximum storage temperature of +150 °C. Its thermal derating curve (Figure 3 in datasheet) shows usable power dissipation decreases linearly above 25 °C ambient, reaching ~50% at 100 °C ambient.
SMF05T1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 4
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 5V
- Voltage - Breakdown (Min):
- 6V
- Voltage - Clamping (Max) @ Ipp:
- 12.5V
- Current - Peak Pulse (10/1000µs):
- 12A (8/20µs)
- Power - Peak Pulse:
- 200W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 90pF @ 1MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-88A (SC-70-5/SOT-353)
SMF05T1 FAQ
1.How can I place an order for SMF05T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF05T1 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 SMF05T1 reliable?
The price and inventory of SMF05T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF05T1 is usually 5 days.
3.What payment methods are accepted for SMF05T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF05T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF05T1?
SMF05T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF05T1 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 SMF05T1?
For technical support, including SMF05T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF05T1 requirements.
6.How does Aetrix verify that SMF05T1 is sourced from the original manufacturer or authorized distributors?
All SMF05T1 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 SMF05T1 meets industry standards.
7.What is the process for return or replacement of SMF05T1?
All SMF05T1 units undergo pre-shipment inspection (PSI). If there is an issue with SMF05T1, 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 SMF05T1 part is unused and in its original packaging.
Return procedure for SMF05T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF05T1 Tags
-
ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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ESD5Z3.3T1G
onsemi
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D5V0H1B2LP-7B
Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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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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