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Semtech Corporation SC431CS-2.TRT
- Part No.:
- SC431CS-2.TRT
- Manufacturer:
- Semtech Corporation
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SC431CS-2.TRT.pdf
- Description:
- IC VREF SHUNT ADJ 2% 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,297
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Product details
Overview
SC431CS-2.TRT 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, USB Type-C VBus, and load switch inputs in industrial and portable electronics.
For engineers reviewing the SC431CS-2.TRT datasheet, pinout, applications, or equivalent options, key selection criteria include clamping stability across temperature and current, low dynamic resistance, DFN-6 package layout constraints, and compatibility with 22V bus protection architectures requiring sub-28V clamping under 40A surge.
Technical Context
The SC431CS-2.TRT 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-across the full 1–40A peak pulse current range due to decreasing RDS(on) under surge conditions.
It operates from −40°C to +125°C with stable 22V reverse stand-off voltage and <600nA leakage at VRWM. Its 175pF junction capacitance at 22V/1MHz and 20mΩ dynamic resistance enable robust protection without signal integrity compromise on high-speed power rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Stand-Off Voltage | 22 V - Maximum continuous operating voltage before triggering; matches 20–22V USB PD VBus systems. |
| Clamping Voltage (IPP = 40A) | 27.5–28 V - Limits transient voltage to safe levels for downstream 30V-rated load switches and PD controllers. |
| Peak Pulse Current (8/20μs) | 40 A - Withstands IEC 61000-4-5 Level 4 surges (±1kV, RS = 42Ω) on unsymmetrical lines. |
| ESD Withstand (IEC 61000-4-2) | ±30 kV contact/air - Eliminates need for secondary ESD stages in USB Type-C connector protection. |
| Dynamic Resistance | 20 mΩ - Ensures minimal IR drop during surge conduction, preserving clamping accuracy and thermal margin. |
| Junction Capacitance | 175 pF @ 22V, 1MHz - Low enough to avoid degrading power rail stability or causing oscillation in DC-DC feedback paths. |
Pinout & Package
SC431CS-2.TRT is housed in a RoHS-compliant DFN-6 package measuring 1.6 mm × 1.6 mm × 0.55 mm with exposed thermal pad not required. All six terminals are electrically grouped: pins 1–3 are GND; pins 4–6 are IN (protected line input). The device requires symmetric PCB routing with all three GND pins tied to a solid ground plane via multiple vias, and all three IN pins connected in parallel to minimize inductance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common return path for surge current; all three must be connected to maximize current sharing and reduce parasitic inductance. |
| 4, 5, 6 | IN | Input terminal for protected line (e.g., USB PD VBus); parallel connection ensures uniform current distribution and full 40A rating. |
Key Features
| Feature | Design Value |
|---|---|
| Constant clamping voltage across IPP range | 27.5–28V from 1A to 40A enables predictable protection margin without derating for surge magnitude. |
| Stable clamping over temperature | No increase in VC from −40°C to +125°C avoids thermal runaway risk in enclosed industrial enclosures. |
| Low dynamic resistance (20mΩ) | Minimizes power dissipation (P = I²×R) during 40A transients, reducing junction temperature rise and improving reliability. |
| DFN-6 footprint (1.6×1.6mm) | Reduces board area by >50% vs. SO-8 TVS solutions while maintaining 1120W peak pulse power capability. |
Applications
| USB Type-C Power Delivery Bus Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting the 20–22V VBus line in USB Type-C ports supporting up to 100W PD, exposed to ESD and lightning-induced surges. IC Role / Device Role / Timing Role: Transient diverting suppressor placed directly at the connector, shunting surge energy to ground before it reaches the PD controller or DC-DC converter. Use Value: Maintains clamping at ≤28V across temperature and current-well below the 30V damage threshold of common PD controllers-eliminating design margin uncertainty. |
Use Scenario: Safeguarding the input of high-side load switches (e.g., HS2950P) in remote meters, robotics, and IoT gateways subjected to field-installed wiring surges. IC Role / Device Role / Timing Role: Primary front-end protector absorbing 40A/8/20μs transients before they stress the load switch's internal MOSFET drain-source junction. Use Value: Prevents latch-up or breakdown of the load switch by limiting transient voltage to 28V, enabling use of lower-voltage, cost-optimized switches without sacrificing surge robustness. |
| Notebook/Tablet Main Power Rail Protection | Storage Device 22V Backup Power Line Protection |
Use Scenario: Securing the main 22V input rail feeding system PMICs and battery charging circuits in thin-client notebooks and detachable tablets. IC Role / Device Role / Timing Role: Fast-acting shunt protector triggered within nanoseconds of overvoltage onset, diverting energy away from sensitive power management ICs. Use Value: 175pF capacitance avoids destabilizing multi-MHz switching regulators; 20mΩ RDYN ensures minimal voltage overshoot during fast-rising transients. |
Use Scenario: Protecting 22V backup power lines supplying NVMe SSDs or eMMC modules during hot-plug or power-fail recovery sequences. IC Role / Device Role / Timing Role: Standby-mode protector with <600nA leakage at 22V, ensuring negligible quiescent current drain on backup batteries or supercaps. Use Value: Enables reliable long-term backup operation by combining ultra-low leakage with guaranteed ±30kV ESD immunity-critical for data integrity in storage subsystems. |
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 electrical specs, same DFN-6 package, but marked with date code and "T22" top-side marking; functionally identical to SC431CS-2.TRT per Semtech documentation. | Same USB PD, load switch, and industrial 22V rail use cases; validated in Semtech reference designs for USB Type-C protection. | Select TDS2211P.C when traceability to Semtech's standard ordering nomenclature is required for procurement or qualification. |
| SMAJ22A | Standard unidirectional TVS diode; 22V VRWM, 35.5V VC @ 22.5A; higher clamping (+7.5V), no current-dependent clamping stability, 100pF capacitance. | Suitable only where clamping voltage margin >35V is acceptable; cannot replace SC431CS-2.TRT in 30V-systems without redesign. | Consider SMAJ22A only for cost-sensitive, non-critical 22V rails where clamping above 30V is tolerable and temperature stability is not required. |
Compared with TDS2211P.C (functionally identical) and SMAJ22A (higher-clamp TVS), SC431CS-2.TRT delivers superior system-level robustness through flat clamping, temperature-invariant performance, and lower dynamic impedance-enabling smaller, more reliable 22V protection without over-engineering downstream components.
Availability
SC431CS-2.TRT is available at Aetrix Electronics and suitable for USB Type-C power delivery interfaces, industrial load switch inputs, and notebook 22V main power rails requiring stable component supply, consistent lead times, and full lifecycle support.
Supply support for SC431CS-2.TRT 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, and signal integrity applications.
SC431CS-2.TRT belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered specifically to replace conventional TVS diodes in high-reliability 22V power rail protection where stable clamping, low dynamic resistance, and temperature resilience are mandatory.
FAQ
What is the maximum continuous operating voltage for SC431CS-2.TRT?
The SC431CS-2.TRT has a reverse stand-off voltage (VRWM) of 22 V, meaning it can continuously block up to 22 V in normal operation without triggering. This makes SC431CS-2.TRT ideal for protecting 20–22 V USB PD VBus lines and other 22 V-rated power rails where sustained voltage compliance is critical.
How does SC431CS-2.TRT achieve stable clamping voltage across varying surge currents?
SC431CS-2.TRT uses a surge-rated FET as its conduction element, controlled by an integrated precision trigger circuit. As surge current increases, the FET's RDS(on) decreases, counteracting IR rise-resulting in near-constant clamping of 27.5–28 V from 1 A to 40 A. This behavior is fundamentally different from TVS diodes and is confirmed in SC431CS-2.TRT's datasheet clamping curves.
Is SC431CS-2.TRT compatible with automated SMT assembly processes?
Yes, SC431CS-2.TRT is supplied in tape-and-reel format (3,000 units per 7-inch reel) and features a standard DFN-6 footprint (1.6 mm × 1.6 mm) with J-lead–free terminations. Its RoHS-compliant, halogen-free construction and UL 94V-0 molding compound meet IPC-J-STD-020 moisture sensitivity level (MSL) 1 requirements for reflow compatibility.
What is the leakage current specification for SC431CS-2.TRT at rated voltage?
At its 22 V reverse stand-off voltage and 25°C, SC431CS-2.TRT exhibits a typical reverse leakage current of 130 nA, with a maximum of 600 nA across temperature. This ultra-low leakage ensures minimal power loss in always-on 22 V backup or monitoring circuits, a key advantage over higher-leakage alternatives.
Can SC431CS-2.TRT protect bidirectional signal lines like USB CC or DP/DM?
No-SC431CS-2.TRT is designed exclusively for unidirectional 22 V power or I/O line protection (e.g., VBus, load switch inputs). For bidirectional high-speed data lines such as USB CC, DP, or DM, Semtech recommends low-capacitance TVS devices like RClamp3371ZC (<0.25 pF), as specified in SC431CS-2.TRT's application notes.
SC431CS-2.TRT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Reference Type:
- Shunt
- Output Type:
- Adjustable
- Voltage - Output (Min/Fixed):
- 2.495V
- Voltage - Output (Max):
- 30 V
- Current - Output:
- 130 µA
- Tolerance:
- ±2%
- Temperature Coefficient:
- -
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 150 mA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
SC431CS-2.TRT FAQ
1.How can I place an order for SC431CS-2.TRT through Aetrix?
Please submit a Request for Quotation (RFQ) for SC431CS-2.TRT 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 SC431CS-2.TRT reliable?
The price and inventory of SC431CS-2.TRT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC431CS-2.TRT is usually 5 days.
3.What payment methods are accepted for SC431CS-2.TRT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC431CS-2.TRT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC431CS-2.TRT?
SC431CS-2.TRT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC431CS-2.TRT 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 SC431CS-2.TRT?
For technical support, including SC431CS-2.TRT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC431CS-2.TRT requirements.
6.How does Aetrix verify that SC431CS-2.TRT is sourced from the original manufacturer or authorized distributors?
All SC431CS-2.TRT 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 SC431CS-2.TRT meets industry standards.
7.What is the process for return or replacement of SC431CS-2.TRT?
All SC431CS-2.TRT units undergo pre-shipment inspection (PSI). If there is an issue with SC431CS-2.TRT, 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 SC431CS-2.TRT part is unused and in its original packaging.
Return procedure for SC431CS-2.TRT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SC431CS-2.TRT Tags
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