My Inquiry
My Account
Semtech Corporation SC4503TSKTRT
- Part No.:
- SC4503TSKTRT
- Manufacturer:
- Semtech Corporation
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
SC4503TSKTRT.pdf
- Description:
- IC REG BOOST ADJ 1.4A TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,746
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SC4503TSKTRT 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, Type-C VBus, and load switch inputs in industrial and portable electronics.
For engineers reviewing the SC4503TSKTRT datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, DFN-6 package layout guidance, clamping stability across temperature and current, and real-world use cases in USB Type-C and load switch input protection.
Technical Context
The SC4503TSKTRT uses a surge-rated FET as its primary protection element, activated by a precision trigger circuit that senses overvoltage events. Unlike conventional TVS diodes, its clamping voltage remains nearly constant-27.5–28V-from 24A to 40A and across –40°C to +125°C due to decreasing RDS(on) under surge conditions.
It operates with reverse stand-off voltage (VRWM) of 22V, breakdown voltage (VBR) of 25–27.9V, and ultra-low junction capacitance of 175pF at 22V/1MHz. Its 6-pin DFN (1.6×1.6×0.55mm) integrates three parallel input terminals (Pins 4–6) and three ground terminals (Pins 1–3) to minimize parasitic inductance and maximize surge current handling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - defines maximum continuous DC operating voltage on protected line without leakage or conduction. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs + 1.2/50μs combo wave, RS=2Ω) - ensures downstream ICs (e.g., USB PD controllers) remain below damage threshold during surge. |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Level 4 industrial surge immunity requirements for 22V systems. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds automotive and industrial ESD robustness standards for connector-facing protection. |
| Dynamic Resistance | 20mΩ (measured 1–40A, 8/20μs) - enables flat clamping curve and low voltage overshoot during fast-rising transients. |
| Junction Capacitance | 175pF at 22V/1MHz - compatible with 22V bus protection without signal integrity degradation on moderate-speed lines. |
Pinout & Package
SC4503TSKTRT is housed in a Pb-free, RoHS-compliant DFN-6 package measuring 1.6mm × 1.6mm × 0.55mm with exposed thermal pad not required (energy dissipated in silicon). All six terminals must be connected per functional role to achieve rated surge performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | GND | Low-inductance ground return path; all three must be soldered to solid ground plane with multiple vias for 40A surge current routing. |
| Pins 4, 5, 6 | IN | Parallel-connected input terminals for protected line (e.g., VBus); shared connection minimizes trace inductance and equalizes current sharing during transient. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies <0.5V from 24A to 40A and remains stable across –40°C to +125°C - eliminates derating uncertainty in thermal designs. |
| Surge-rated FET protection | Replaces traditional TVS diodes with active shunt switching - achieves lower clamping than passive devices at same working voltage. |
| High-energy EOS handling | 1120W peak pulse power (8/20μs) - supports repeated surge events in industrial equipment and USB PD applications. |
| Low-leakage operation | 600nA max reverse leakage at 22V - prevents battery drain or bias shift in always-on 22V systems like remote meters and IoT sensors. |
Applications
| USB Type-C Power Delivery Bus Protection | Industrial Load Switch Input Protection |
|---|---|
|
Use Scenario: Protecting the VBus line of a USB Type-C port supporting up to 20V/5A PD negotiation against lightning-induced surges and connector ESD. IC Role / Device Role / Timing Role: Transient Diverting Suppressor placed directly at the connector, clamping transients before they reach the PD controller or e-fuse. Use Value: Maintains 27.5–28V clamping across full 40A surge range and temperature extremes - avoids overvoltage damage to sensitive PD ICs where traditional TVS would exceed 35V at 125°C. |
Use Scenario: Safeguarding the input of an industrial-grade load switch (e.g., HS2950P) powering remote sensors or actuators in metering or robotics systems. IC Role / Device Role / Timing Role: Primary front-end EOS protector absorbing 8/20μs surges from long cables or inductive loads before reaching the switch's internal FET. Use Value: Limits clamping voltage to ≤28V - well below typical 30V+ absolute maximum rating of load switch inputs - preventing gate oxide damage and ensuring long-term reliability. |
| IoT Edge Device Power Rail Protection | Storage Device 22V Backup Supply Protection |
|
Use Scenario: Securing the 22V auxiliary power rail of a battery-backed smart gateway exposed to field ESD and conducted surges via PoE or external adapters. IC Role / Device Role / Timing Role: Solid-state shunt suppressor providing low-capacitance, low-leakage protection without compromising standby current or signal integrity. Use Value: 175pF capacitance and <600nA leakage at 22V enable compatibility with always-on monitoring circuits while meeting IEC 61000-4-4 (±4kV EFT) and -4-5 requirements. |
Use Scenario: Protecting the 22V backup supply input of an enterprise SSD or NAS controller board against power-rail transients during hot-swap or AC line disturbances. IC Role / Device Role / Timing Role: High-power transient suppressor placed at board edge to divert energy away from PMICs, flash controllers, and DRAM power domains. Use Value: 40A surge rating and 1120W peak power capability ensure survivability of multi-event surge stress common in datacenter power environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDS2211P.C | Identical die, same DFN-6 package, identical electrical specs - direct Semtech-recommended replacement with identical marking (T22) and reel packaging. | No functional difference; used interchangeably in USB PD and industrial designs per Semtech documentation. | Select TDS2211P.C when sourcing from authorized Semtech channels with standard tape-and-reel logistics. |
| uClamp2411ZA | 24V working voltage, ±30kV ESD, but lower 20A IPP and higher 33V clamping at 20A - uses silicon avalanche structure, not FET-based clamping. | Better suited for CC/SBU lines in USB Type-C; insufficient for 22V VBus due to higher clamping and lower surge rating. | Use uClamp2411ZA only for auxiliary low-current lines - not a functional substitute for SC4503TSKTRT on main power rails. |
Compared with TDS2211P.C (identical spec) and uClamp2411ZA (lower IPP, higher clamping), SC4503TSKTRT delivers unique constant-voltage clamping at 40A for 22V systems - making it irreplaceable for high-reliability VBus and load switch protection where thermal stability and surge margin are critical.
Availability
SC4503TSKTRT is available at Aetrix Electronics and suitable for USB Type-C power delivery interfaces, industrial load switch inputs, and IoT edge device 22V power rails requiring stable component supply, long-lifecycle support, and guaranteed surge performance compliance.
Supply support for SC4503TSKTRT 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 high-performance analog and mixed-signal semiconductors for power management, protection, sensing, and connectivity.
SC4503TSKTRT belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered specifically to replace conventional TVS diodes in high-voltage, high-surge industrial and USB PD applications with superior clamping stability and temperature resilience.
FAQ
What is the exact package type and dimensions of SC4503TSKTRT?
SC4503TSKTRT uses a 6-pin DFN package measuring 1.6mm × 1.6mm × 0.55mm with no exposed thermal pad. Pins 1–3 are GND; Pins 4–6 are IN. Land pattern follows Semtech's recommended footprint with 0.30mm pitch and 0.50mm pad width per terminal - critical for achieving full 40A surge rating.
Does SC4503TSKTRT meet IEC 61000-4-5 Level 4 surge immunity?
Yes, SC4503TSKTRT is rated for 40A peak pulse current (8/20μs) and ±1kV combination wave (1.2/50μs voltage, 8/20μs current, RS=42Ω), satisfying IEC 61000-4-5 Level 4 for 22V systems. Its 27.5–28V clamping ensures protected ICs stay within safe operating limits during test-level surges.
How does SC4503TSKTRT differ from standard TVS diodes in clamping behavior?
Unlike standard TVS diodes whose clamping voltage rises linearly with current (VC = VBR + IPP × RDYN), SC4503TSKTRT uses a triggered FET to maintain near-constant clamping - 27.5–28V from 24A to 40A and across –40°C to +125°C - eliminating thermal derating and enabling predictable protection design.
Can SC4503TSKTRT be used on USB Type-C superspeed differential pairs?
No, SC4503TSKTRT is not suitable for USB SS TX/RX lines due to its 175pF capacitance, which would distort high-speed signals. It is intended exclusively for VBus, CC, SBU, or power-rail protection. For superspeed lines, Semtech recommends RClamp3371ZC (<0.25pF) instead of SC4503TSKTRT.
What is the maximum operating temperature range for SC4503TSKTRT?
SC4503TSKTRT is specified for continuous operation from –40°C to +125°C ambient temperature, with junction temperature rated up to +150°C. Its clamping voltage remains stable across this full range - a key advantage over TVS diodes whose VC increases significantly above 85°C.
SC4503TSKTRT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 20V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- 27V
- Current - Output:
- 1.4A (Switch)
- Frequency - Switching:
- 1.3MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-5
SC4503TSKTRT FAQ
1.How can I place an order for SC4503TSKTRT through Aetrix?
Please submit a Request for Quotation (RFQ) for SC4503TSKTRT 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 SC4503TSKTRT reliable?
The price and inventory of SC4503TSKTRT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC4503TSKTRT is usually 5 days.
3.What payment methods are accepted for SC4503TSKTRT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC4503TSKTRT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC4503TSKTRT?
SC4503TSKTRT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC4503TSKTRT 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 SC4503TSKTRT?
For technical support, including SC4503TSKTRT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC4503TSKTRT requirements.
6.How does Aetrix verify that SC4503TSKTRT is sourced from the original manufacturer or authorized distributors?
All SC4503TSKTRT 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 SC4503TSKTRT meets industry standards.
7.What is the process for return or replacement of SC4503TSKTRT?
All SC4503TSKTRT units undergo pre-shipment inspection (PSI). If there is an issue with SC4503TSKTRT, 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 SC4503TSKTRT part is unused and in its original packaging.
Return procedure for SC4503TSKTRT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SC4503TSKTRT Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
