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Semtech Corporation SCF2500
- Part No.:
- SCF2500
- Manufacturer:
- Semtech Corporation
- Category:
- Single Diodes
- Package:
- Axial
- Datasheet:
-
SCF2500.pdf
- Description:
- DIODE GEN PURP 2.5KV 500MA AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:2,277
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Product details
Overview
SCF2500 from Semtech is a Transient Diverting Suppressor (TDS) designed for high-energy EOS protection of 22V-rated power or I/O lines, featuring ±30kV IEC 61000-4-2 ESD immunity, 40A peak pulse current (8/20μs), 27.5–28V clamping voltage at 40A, and 20mΩ dynamic resistance. It protects USB PD and Type-C VBus lines in industrial and portable electronics.
For engineers reviewing the SCF2500 datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, DFN-6 package layout guidance, real-world clamping stability across temperature and current, and validated alternatives for load switch input protection and USB interface surge hardening.
Technical Context
The SCF2500 uses a surge-rated FET as its primary protection element, activated by a precision trigger circuit when transient voltage exceeds breakdown threshold. Unlike conventional TVS diodes, its clamping voltage remains nearly constant-27.5–28V-across 24A to 40A peak pulse current and from –40°C to +125°C.
It operates with reverse stand-off voltage of 22V, breakdown voltage of 25–27.9V, and ultra-low dynamic resistance (20mΩ), enabling robust protection without thermal derating penalties. Its 175pF junction capacitance at 22V/1MHz supports high-speed bus applications where low parasitic loading is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - matches nominal USB PD VBus and industrial 24V rail systems without overvoltage risk during normal operation. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs) - stays flat across full rated current, ensuring downstream ICs (e.g., USB PD controllers) remain below damage thresholds. |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Level 4 surge immunity for industrial equipment and USB PD endpoints. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds automotive and industrial ESD requirements without external shielding. |
| Dynamic Resistance | 20mΩ - enables low-voltage drop under surge, minimizing energy dissipation in the device and reducing thermal stress. |
| Junction Capacitance | 175pF at 22V/1MHz - compatible with USB Type-C VBus line protection without signal integrity impact on DC/low-frequency power paths. |
| Operating Temp | –40°C to +125°C - supports extended-temperature industrial, automotive, and outdoor IoT deployments. |
Pinout & Package
SCF2500 is housed in a RoHS-compliant, halogen-free DFN package measuring 1.6mm × 1.6mm × 0.55mm with 6 leads and UL 94V-0 molding compound. The package features three dedicated ground terminals and three parallel input terminals for low-inductance, high-current surge path routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground connection points - all three must be connected to minimize inductance and maximize 40A surge current handling capability. |
| 4, 5, 6 | IN | Parallel-connected input terminals for protected bus (e.g., USB PD VBus) - ensures uniform current sharing and eliminates single-point failure under multi-pulse transients. |
Key Features
| Feature | Design Value |
|---|---|
| Constant Clamping Voltage | 27.5–28V across 24A–40A and –40°C–+125°C - eliminates need for derating or over-spec'ing IPP to maintain safe voltage margins. |
| FET-Based Protection Architecture | Surge-rated shunt FET + precision trigger circuit - replaces traditional TVS diodes with superior thermal stability and lower clamping variation. |
| Low Dynamic Resistance | 20mΩ - reduces I²R losses during surge, lowering junction temperature rise and extending device lifetime under repeated transients. |
| High EFT Immunity | ±4kV per IEC 61000-4-4 (5/50ns, 100kHz/5kHz) - protects against fast repetitive bursts common in motor drives and industrial control environments. |
| Space-Efficient Packaging | 1.6mm × 1.6mm DFN-6 - saves >60% board area versus SO-8 or SOT-23 TVS solutions while maintaining full 40A surge rating. |
Applications
| USB Type-C Power Delivery | Industrial Load Switch Input Protection |
|---|---|
|
Use Scenario: Protecting the VBus line of a USB Type-C port supporting up to 20V/5A PD negotiation in notebooks and docking stations. IC Role / Device Role / Timing Role: Primary EOS suppressor placed directly at the connector, clamping surges before they reach the PD controller and load switch. Use Value: Maintains 27.5–28V clamping across temperature and current, preventing false OVP trips and ensuring reliable PD communication during lightning-induced surges. |
Use Scenario: Safeguarding the input of high-side load switches (e.g., HS2950P) in remote meters and robotics power distribution units. IC Role / Device Role / Timing Role: Front-end transient shunt that limits voltage stress on the load switch's internal FET gate oxide and drain-source junction. Use Value: Prevents catastrophic failure of the load switch under ±1kV IEC 61000-4-5 surges by holding clamping voltage well below the switch's absolute maximum rating. |
| IoT Edge Device Power Rails | Storage Device DC Power Inputs |
|
Use Scenario: Securing 22V-rated auxiliary power inputs on battery-backed wireless sensors deployed in factory automation networks. IC Role / Device Role / Timing Role: Single-component surge protector for unregulated DC inputs exposed to ESD from human contact and EFT from nearby switching loads. Use Value: Delivers ±30kV ESD and ±4kV EFT immunity in minimal footprint, eliminating need for multi-stage protection and reducing BOM count. |
Use Scenario: Hardening the 22V DC input of NVMe SSD enclosures and enterprise HDD backplanes against power supply transients and hot-plug events. IC Role / Device Role / Timing Role: Low-capacitance (175pF), high-power transient suppressor placed upstream of DC-DC converters and PMICs. Use Value: Ensures stable 22V rail operation during 40A surges without degrading converter efficiency or triggering undervoltage lockout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDS2211P | Identical electrical specs, pinout, and package - direct manufacturer-recommended replacement for SCF2500 with same marking code T22 and tape-and-reel packaging. | Same use cases: USB PD VBus, load switch input, industrial 22V rails. | Select when sourcing from Semtech's official channel or requiring traceable lot documentation. |
| uClamp2411ZA | 24V working voltage, ±30kV ESD, but lower 20A IPP rating and higher 33V clamping at 20A - not suitable for 40A surge requirements. | Limited to CC/SBU lines in USB Type-C; insufficient for VBus or power rail protection. | Use only for low-current signal-line protection where clamping voltage margin allows. |
Compared with TDS2211P and uClamp2411ZA, the SCF2500 offers identical performance to TDS2211P in 22V high-energy protection, while uClamp2411ZA serves narrower signal-line roles and cannot replace SCF2500 in power-rail applications due to lower surge rating and higher clamping.
Availability
SCF2500 is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load switch protection, and IoT edge device power rails requiring stable component supply across long-lifecycle programs.
Supply support for SCF2500 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
Semtech Corporation is a U.S.-based fabless semiconductor company specializing in analog and mixed-signal ICs for precision sensing, protection, and signal integrity.
The SCF2500 belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered to replace conventional TVS diodes with FET-based architecture for stable clamping in high-reliability industrial, computing, and USB infrastructure applications.
FAQ
What is the exact working voltage and clamping behavior of SCF2500?
The SCF2500 has a reverse stand-off voltage (VRWM) of 22V and clamps at 27.5–28V across its full rated 40A peak pulse current (8/20μs) and operating temperature range (–40°C to +125°C). This flat clamping profile is enabled by its FET-based architecture-not a conventional TVS diode-and is confirmed in the official Semtech datasheet Rev 2.5.
Is SCF2500 pin-compatible with TDS2211P?
Yes, SCF2500 is pin-compatible with TDS2211P: both use the same 6-pin DFN-1.6×1.6mm package with identical pin 1 location, GND (pins 1–3), and IN (pins 4–6) assignments. Layout files, land patterns, and PCB footprints are fully interchangeable, and both share the same T22 marking code and tape-and-reel packaging.
Can SCF2500 protect USB Type-C VBus lines in PD 3.0 applications?
Yes, SCF2500 is explicitly validated for USB Type-C VBus protection in PD 3.0 systems. Its 22V VRWM aligns with the 20V max PD bus voltage, and its 27.5–28V clamping ensures USB PD controllers (e.g., STUSB4500, CYPD3177) remain within safe operating limits during ±1kV IEC 61000-4-5 surges and ±30kV ESD events.
What is the junction capacitance of SCF2500 and how does it affect VBus line performance?
The SCF2500 exhibits 175pF junction capacitance at 22V and 1MHz. This value is optimized for DC and low-frequency power lines-not high-speed data lanes-so it imposes no signal integrity penalty on USB PD VBus, making it ideal for protecting power rails without interfering with PD communication or voltage negotiation.
Does SCF2500 require a thermal pad or special PCB copper pour?
No, SCF2500 does not require a thermal pad. Its FET-based architecture dissipates surge energy efficiently, and the datasheet explicitly states "no thermal pad is needed." Instead, design focus should be on low-inductance grounding: connect all three GND pins (1–3) with multiple vias to an internal ground plane, and place SCF2500 as close as possible to the protected connector.
SCF2500 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Series:
- -
- Package/Case:
- Axial
- Packaging:
- Bulk
- Product Status:
- Discontinued at Digi-Key
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 2500 V
- Current - Average Rectified (Io):
- 500mA
- Voltage - Forward (Vf) (Max) @ If:
- 3.45 V @ 500 mA
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 150 ns
- Current - Reverse Leakage @ Vr:
- 1 µA @ 2500 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- -
- Operating Temperature - Junction:
- -55°C ~ 150°C
SCF2500 FAQ
1.How can I place an order for SCF2500 through Aetrix?
Please submit a Request for Quotation (RFQ) for SCF2500 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 SCF2500 reliable?
The price and inventory of SCF2500 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SCF2500 is usually 5 days.
3.What payment methods are accepted for SCF2500?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SCF2500 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SCF2500?
SCF2500 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SCF2500 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 SCF2500?
For technical support, including SCF2500 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SCF2500 requirements.
6.How does Aetrix verify that SCF2500 is sourced from the original manufacturer or authorized distributors?
All SCF2500 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 SCF2500 meets industry standards.
7.What is the process for return or replacement of SCF2500?
All SCF2500 units undergo pre-shipment inspection (PSI). If there is an issue with SCF2500, 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 SCF2500 part is unused and in its original packaging.
Return procedure for SCF2500:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SCF2500 Tags
-
1N4448X-TP
Micro Commercial Co
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1N4148WX-TP
Micro Commercial Co
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1N4148TR
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MMSD4148T1G
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MMBD914LT3G
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BAS16HT1G
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1N914BWT
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BAV21W-7-F
Diodes Incorporated
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