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Semtech Corporation SCH5000
- Part No.:
- SCH5000
- Manufacturer:
- Semtech Corporation
- Category:
- Single Diodes
- Package:
- Axial
- Datasheet:
-
SCH5000.pdf
- Description:
- DIODE GEN PURP 5KV 500MA AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:4,408
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Product details
Overview
TDS2211P from Semtech is a transient diverting suppressor designed to protect 22V-rated I/O or power lines against EOS, ESD, and surge events. It delivers ±30kV IEC 61000-4-2 contact/air ESD immunity, 40A (8/20μs) peak pulse current handling, and a stable 27.5–28V clamping voltage across temperature and current range - deployed in USB Type-C PD bus protection.
For engineers reviewing the TDS2211P datasheet, pinout, applications, or equivalent options, key selection criteria include its constant-clamp FET-based architecture, DFN 1.6×1.6mm 6-lead package, low 20mΩ dynamic resistance, 175pF junction capacitance at 22V, and suitability for industrial load switch input protection where thermal stability of clamping voltage is critical.
Technical Context
The TDS2211P uses a surge-rated FET as the primary shunt 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) from 24A to 40A (1.2/50μs + 8/20μs combination waveform, RS = 2Ω) due to decreasing RDS(on) under surge.
It operates over –40°C to +125°C with reverse stand-off voltage (VRWM) of 22V, breakdown voltage (VBR) of 25–27.9V, and reverse leakage <600nA at 22V. Its 175pF capacitance at 22V and 1MHz makes it suitable for DC/low-speed bus protection but not high-speed data lines without supplemental low-C devices.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - defines maximum continuous DC or RMS operating voltage on protected line without leakage or degradation. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs + 1.2/50μs combo wave, RS = 2Ω) - ensures downstream 24V-rated 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 per IEC 61000-4-2 - exceeds automotive and industrial ESD immunity standards for connector-facing protection. |
| Dynamic Resistance | 20mΩ (measured 1–40A, 8/20μs) - enables flat clamping response and minimizes voltage overshoot during fast-rising transients. |
| Junction Capacitance | 175pF at 22V, 1MHz - compatible with USB PD VBUS, industrial 24V power rails, and load switch inputs; not suitable for >100MHz signal lines. |
| Package | DFN 1.6mm × 1.6mm × 0.55mm, 6-lead - enables ultra-compact placement near connectors with minimal PCB area (≈2.56 mm² footprint). |
Pinout & Package
Package: DFN 1.6mm × 1.6mm × 0.55mm, 6-lead, Pb-free, RoHS/WEEE compliant, UL 94V-0 molding compound. Thermal pad not required - energy dissipated internally via FET channel.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground return path for surge current; all three pins must be connected to maximize current sharing and minimize parasitic inductance. |
| 4, 5, 6 | IN | Protected line input (e.g., VBUS, load switch VIN); all three pins are internally paralleled and must be shorted externally for full 40A rating. |
Key Features
| Feature | Design Value |
|---|---|
| FET-based clamping | Enables near-constant 27.5–28V clamping across 24–40A and –40°C to +125°C - eliminates thermal derating uncertainty vs. TVS diodes. |
| Low dynamic resistance | 20mΩ ensures minimal IR drop during surge, preserving voltage margin for downstream 24V-rated components like e-fuses and PD controllers. |
| High-energy surge rating | 1120W peak pulse power (8/20μs) supports robust protection in industrial equipment exposed to lightning-induced surges. |
| Ultra-low leakage | <600nA at 22V enables use on always-on power rails without measurable standby current penalty. |
| Compact DFN layout | 1.6×1.6mm footprint allows placement within 2mm of USB-C or industrial connector - critical for minimizing trace inductance in ESD path. |
Applications
| USB Type-C Power Delivery Bus Protection | Industrial Load Switch Input Protection |
|---|---|
|
Use Scenario: Protecting 20–22V USB PD VBUS lines from ESD, lightning surges, and hot-plug transients in portable and docking stations. IC Role / Device Role / Timing Role: Primary shunt protector placed between connector and PD controller/load switch - clamps transients before they reach sensitive silicon. Use Value: Maintains 27.5–28V clamping across temperature and current, enabling reliable operation of 24V-rated PD controllers without overdesigning IPP margin. |
Use Scenario: Safeguarding input terminals of industrial-grade load switches (e.g., HS2950P) in remote meters, robotics, and IoT gateways. IC Role / Device Role / Timing Role: Front-end EOS suppressor that limits voltage stress on internal FETs during surge events - prevents gate oxide damage and latch-up. Use Value: Prevents catastrophic failure of load switches rated for ≤24V absolute max, using stable clamping independent of ambient temperature drift. |
| IoT Device Power Rail Protection | Storage Device 24V Backup Supply Protection |
|
Use Scenario: Securing 22V auxiliary power rails in battery-backed edge sensors and wireless gateways exposed to field ESD and induced surges. IC Role / Device Role / Timing Role: Standalone transient diverter on DC input rail - handles both fast ESD (±30kV) and slower surges (±1kV, 1.2/50μs) per IEC 61000-4-5. Use Value: Eliminates need for multi-stage protection; single device satisfies IEC 61000-4-2, -4-4, and -4-5 requirements with no external components. |
Use Scenario: Protecting 22V backup battery or capacitor bank inputs in enterprise SSDs and NAS enclosures against power rail transients. IC Role / Device Role / Timing Role: Overvoltage clamp on storage subsystem power entry - prevents overvoltage damage to charge management ICs and flash controllers. Use Value: 175pF capacitance avoids signal integrity issues on low-frequency power rails, while 40A rating covers worst-case surge coupling from shared chassis grounds. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22A | Standard unidirectional TVS diode; clamping rises from ~35V @ 24A to ~42V @ 40A; higher dynamic resistance (~0.5Ω); 100pF capacitance. | Limited to lower-energy surges; unsuitable for high-temp industrial environments where clamping voltage drift exceeds 24V IC tolerance. | Select only if cost sensitivity outweighs clamping stability and thermal performance requirements. |
| SP1003-220K | Bi-directional polymer ESD suppressor; 22V working voltage; ±30kV ESD rating; but limited to 5A (8/20μs); no IEC 61000-4-5 surge rating. | Applicable only for ESD-only scenarios (e.g., front-panel buttons); cannot replace TDS2211P in surge-prone power rail applications. | Use only for low-current, human-accessible I/O points - never for VBUS or load switch inputs requiring 40A surge handling. |
Compared with SMAJ22A and SP1003-220K, the TDS2211P uniquely combines 40A surge capability, ±30kV ESD immunity, and thermally stable 27.5–28V clamping - making it the sole option for compact, high-reliability 22V bus protection in USB PD and industrial power systems.
Availability
TDS2211P is available at Aetrix Electronics and suitable for USB Type-C PD designs, industrial load switch interfaces, and IoT 22V power rail protection requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for TDS2211P 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 connectivity.
The TDS family was developed to overcome clamping voltage drift and thermal derating limitations of traditional TVS diodes - targeting high-reliability 20–30V power and interface protection in industrial, computing, and USB ecosystem applications.
FAQ
What is the primary protection function of the TDS2211P?
The TDS2211P functions as a transient diverting suppressor that shunts high-energy EOS, ESD, and surge currents to ground using an integrated surge-rated FET. Unlike TVS diodes, it maintains a stable 27.5–28V clamping voltage across its full 40A (8/20μs) rating and –40°C to +125°C operating range - directly protecting 22V-rated power rails and interfaces. This behavior is confirmed in the Semtech TDS2211P datasheet Rev 2.5, Section 1 and Figure 3.
Can the TDS2211P be used on high-speed data lines like USB SuperSpeed or PCIe?
No, the TDS2211P is not suitable for high-speed data lines. Its 175pF junction capacitance at 22V and 1MHz introduces excessive signal distortion and insertion loss on differential pairs operating above ~100MHz. The datasheet explicitly positions it for VBUS, load switch inputs, and other DC/low-speed power rails - while recommending low-capacitance devices like RClamp3371ZC (<0.25pF) for USB SS, DP/DM, and CC/SBU lines. This functional separation is detailed in Figure 4 and Application Information on page 5.
How should the six pins of the TDS2211P be connected on the PCB?
Pins 1, 2, and 3 are GND and must be shorted together and connected to a low-inductance ground plane using multiple vias. Pins 4, 5, and 6 are IN and must be shorted together and routed as a single low-inductance trace from the protected connector. The datasheet mandates connecting all six pins to achieve full 40A surge rating and optimal thermal performance - partial connection degrades peak current capability and clamping consistency. Layout guidance is provided in Figure 7 and Pin Configuration section on page 6.
Does the TDS2211P require a thermal pad or heatsink?
No, the TDS2211P does not require a thermal pad or external heatsink. Its FET-based architecture dissipates surge energy through the channel rather than the junction, eliminating the need for thermal conduction to the PCB. The datasheet states "no thermal pad is needed" and confirms energy is dissipated internally - verified in the Mechanical Characteristics section (page 1) and Layout Guidelines (page 6). This distinguishes it from traditional TVS diodes that rely on thermal mass for surge handling.
Is the TDS2211P compliant with industrial surge immunity standards?
Yes, the TDS2211P meets IEC 61000-4-5 Level 4 requirements with its 40A (8/20μs) rating and ±1kV (1.2/50μs, RS = 42Ω) capability for unsymmetrical lines. It also exceeds IEC 61000-4-2 (±30kV contact/air) and IEC 61000-4-4 (±4kV EFT) standards. These ratings are specified in the Features and Absolute Maximum Ratings tables (pages 1–2), and its stable clamping behavior under combined waveform testing is validated in Typical Characteristics (page 3).
SCH5000 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):
- 5000 V
- Current - Average Rectified (Io):
- 500mA
- Voltage - Forward (Vf) (Max) @ If:
- 5 V @ 1 A
- Speed:
- Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 5 µs
- Current - Reverse Leakage @ Vr:
- 1 µA @ 5000 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- -
- Operating Temperature - Junction:
- -55°C ~ 150°C
SCH5000 FAQ
1.How can I place an order for SCH5000 through Aetrix?
Please submit a Request for Quotation (RFQ) for SCH5000 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 SCH5000 reliable?
The price and inventory of SCH5000 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SCH5000 is usually 5 days.
3.What payment methods are accepted for SCH5000?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SCH5000 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SCH5000?
SCH5000 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SCH5000 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 SCH5000?
For technical support, including SCH5000 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SCH5000 requirements.
6.How does Aetrix verify that SCH5000 is sourced from the original manufacturer or authorized distributors?
All SCH5000 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 SCH5000 meets industry standards.
7.What is the process for return or replacement of SCH5000?
All SCH5000 units undergo pre-shipment inspection (PSI). If there is an issue with SCH5000, 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 SCH5000 part is unused and in its original packaging.
Return procedure for SCH5000:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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