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Semtech Corporation SCH12500
- Part No.:
- SCH12500
- Manufacturer:
- Semtech Corporation
- Category:
- Single Diodes
- Package:
- Axial
- Datasheet:
-
SCH12500.pdf
- Description:
- DIODE GP 12.5KV 500MA AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:4,804
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Product details
Overview
TDS2211P from Semtech is a transient diverting suppressor 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 Type-C power delivery buses, load switch inputs, and industrial interfaces where stable clamping under temperature and current stress is critical.
For engineers reviewing the TDS2211P datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, DFN-6 package layout guidance, real-world USB PD and load switch protection use cases, and validated alternative surge protectors with documented functional trade-offs.
Technical Context
The TDS2211P uses a surge-rated FET as its primary protection element, activated by a precision trigger circuit that turns on the shunt path when transient voltage exceeds breakdown. Unlike conventional TVS diodes, its clamping voltage remains nearly constant across 24–40A (8/20μs) due to decreasing RDS(on), not fixed dynamic resistance.
It operates from −40°C to +125°C with <600nA reverse leakage at 22V, 175pF junction capacitance at 22V/1MHz, and maintains stable 27.5–28V clamping up to 125°C - a key differentiator versus standard TVS devices whose clamping rises with temperature and current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - defines maximum continuous DC bus voltage it can protect without leakage or degradation. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs + 1.2/50μs combo waveform) - ensures protected ICs (e.g., USB PD controllers) stay below damage thresholds during surges. |
| Peak Pulse Current | 40A (8/20μs) - supports compliance with IEC 61000-4-5 ±1kV surge testing on 42Ω source impedance lines. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds Level 4 requirements for handheld and portable equipment interfaces. |
| Dynamic Resistance | 20mΩ - enables low-voltage-drop shunting, minimizing energy dissipation in the device and reducing thermal stress. |
| Junction Capacitance | 175pF at 22V/1MHz - compatible with DC power rails and low-speed control lines; unsuitable for >100MHz signal paths. |
Pinout & Package
Package: DFN 1.6mm × 1.6mm × 0.55mm, 6-lead, RoHS-compliant, UL 94V-0 molding compound, lead-free finish. Exposed pad not present; all six terminals are signal/ground connections.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground return path for surge current; all three must be connected to maximize current handling and minimize inductance. |
| 4, 5, 6 | IN | Input terminal for protected line (e.g., VBUS in USB PD); parallel connection of all three pins reduces trace inductance and improves surge response. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.5V across full 24–40A surge range - eliminates design margin inflation needed with traditional TVS diodes. |
| Temperature-stable protection | Clamping remains 27.5–28V from −40°C to +125°C - enables reliable operation in automotive under-hood or industrial ambient conditions. |
| Low dynamic resistance | 20mΩ measured between 1A–40A (8/20μs) - reduces I²R heating and allows higher surge repetition rates without thermal derating. |
| High-energy capability | 1120W peak pulse power (8/20μs) - sustains single-event lightning-like transients without failure or parameter shift. |
Applications
| USB Type-C Power Delivery Bus Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting 20V–22V VBUS lines in USB-C ports supporting Power Delivery negotiation and up to 100W power transfer. IC Role / Device Role / Timing Role: Transient diverting suppressor placed at connector entry point to shunt EOS events before reaching PD controller and power switches. Use Value: Maintains 27.5–28V clamping across temperature and current - prevents false overvoltage shutdown or latch-up in PD controllers rated for ≤30V absolute max. |
Use Scenario: Safeguarding input pins of high-side load switches (e.g., HS2950P) in remote meters, robotics, and IoT edge nodes exposed to field-installed wiring surges. IC Role / Device Role / Timing Role: Primary front-end surge clamp limiting transient voltage seen by the load switch's internal FET gate oxide and drain-source junction. Use Value: Clamps below 28V at 40A - avoids gate oxide breakdown or avalanche-induced latch-up in 30V-rated load switches operating near thermal limits. |
| IoT Device DC Power Rail Protection | Storage Device 22V Backup Supply Protection |
Use Scenario: Securing 22V auxiliary power inputs in battery-backed smart sensors and gateway modules deployed in uncontrolled environments. IC Role / Device Role / Timing Role: Solid-state EOS protector replacing bulkier MOV+TVS stacks, enabling compact PCB layouts with minimal parasitic inductance. Use Value: 175pF capacitance and 600nA leakage at 22V allow direct placement on power rails without affecting startup sequencing or standby current budgets. |
Use Scenario: Protecting 22V backup supply lines feeding NVMe SSDs or enterprise SATA drives during hot-swap or power-fail recovery sequences. IC Role / Device Role / Timing Role: Fast-acting shunt device that activates within nanoseconds of overvoltage onset, preventing data corruption or NAND controller reset. Use Value: ±30kV ESD rating and 40A surge capacity meet IEC 61000-4-5 Class 3 and IEC 61000-4-2 Level 4 - ensuring reliability in datacenter rack-level surge events. |
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; 35.1V min breakdown, 36.5V max clamping at 22.5A (8/20μs); no constant-clamp behavior. | Clamping rises to ~42V at 40A and increases with temperature - requires larger safety margin for 30V-rated ICs. | Lower cost, widely available, but demands higher voltage headroom and thermal derating in high-temp designs. |
| TPD2E007DRYR | Low-capacitance (3.5pF) dual-channel TVS for data lines; 24V working voltage, 12A peak pulse; not rated for 40A or power rail use. | Designed for USB 2.0/DP/DM lines - insufficient surge rating and thermal mass for VBUS or load switch protection. | Only suitable for signal-line protection alongside TDS2211P; cannot replace it in power-rail roles. |
Compared with SMAJ22A and TPD2E007DRYR, the TDS2211P uniquely delivers flat 27.5–28V clamping across 40A and −40°C to +125°C - making it the only option for space-constrained, thermally aggressive 22V power rail protection where voltage margin is tight and reliability is non-negotiable.
Availability
TDS2211P is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load switch interfaces, and IoT device DC power rails requiring stable component supply, long-term lifecycle support, and guaranteed RoHS/REACH compliance.
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 signal integrity.
The TDS series was developed to overcome clamping voltage drift in conventional TVS diodes, targeting high-reliability 22V–36V power rail and interface protection in USB PD, industrial automation, and ruggedized edge computing.
FAQ
What is the maximum continuous operating voltage for TDS2211P?
The TDS2211P has a reverse stand-off voltage (VRWM) of 22V, meaning it is rated for continuous DC operation up to 22V on the protected line. Operating above this voltage risks excessive leakage current and premature activation. The device's 25–27.9V breakdown threshold ensures robust margin against normal voltage transients while maintaining reliable blocking behavior at nominal 22V bus levels - a key specification confirmed in the Semtech TDS2211P datasheet Rev 2.5.
How does TDS2211P differ from standard TVS diodes in clamping behavior?
Unlike standard TVS diodes whose clamping voltage rises linearly with peak pulse current (VC = VBR + IPP × RDYN), the TDS2211P uses a triggered FET architecture that maintains clamping voltage within 27.5–28V from 24A to 40A (8/20μs). This constant-clamp behavior - verified in Figure 3 of the TDS2211P datasheet - eliminates the need for oversized voltage margins in designs protecting 30V-tolerant ICs like USB PD controllers.
Can TDS2211P be used on high-speed data lines such as USB 3.2 or PCIe?
No, the TDS2211P is not suitable for high-speed data lines. Its 175pF junction capacitance at 22V/1MHz introduces excessive signal distortion and insertion loss on differential pairs operating above ~100MHz. It is explicitly designed for DC power rails and low-speed control lines - as confirmed in the "Typical Applications" section of the TDS2211P datasheet, which specifies USB Type-C VBUS (not SS lanes), load switch inputs, and industrial power inputs.
What is the recommended PCB layout for optimal surge performance of TDS2211P?
Semtech recommends connecting all three IN pins (4, 5, 6) via a single short, wide trace to the protected line, and all three GND pins (1, 2, 3) to a solid ground plane using multiple vias - as shown in Figure 7 of the TDS2211P datasheet. Placement must be within 5mm of the connector to minimize inductance; no thermal pad is required since energy is dissipated in the FET channel, not the junction. Deviations increase clamping voltage and reduce 40A surge survivability.
Is TDS2211P compliant with automotive AEC-Q200 or industrial IEC 61000-6-2 standards?
The TDS2211P meets IEC 61000-4-2 (±30kV ESD), IEC 61000-4-4 (±4kV EFT), and IEC 61000-4-5 (±1kV surge) - per its datasheet test conditions - but is not AEC-Q200 qualified. Its −40°C to +125°C operating temperature range supports industrial and extended commercial applications, though automotive under-hood deployment requires additional system-level validation beyond the device's published specs. No AEC-Q200 qualification is claimed in the TDS2211P documentation.
SCH12500 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):
- 12500 V
- Current - Average Rectified (Io):
- 500mA
- Voltage - Forward (Vf) (Max) @ If:
- 13 V @ 1 A
- Speed:
- Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 5 µs
- Current - Reverse Leakage @ Vr:
- 1 µA @ 12500 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- -
- Operating Temperature - Junction:
- -55°C ~ 150°C
SCH12500 FAQ
1.How can I place an order for SCH12500 through Aetrix?
Please submit a Request for Quotation (RFQ) for SCH12500 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 SCH12500 reliable?
The price and inventory of SCH12500 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SCH12500 is usually 5 days.
3.What payment methods are accepted for SCH12500?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SCH12500 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SCH12500?
SCH12500 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SCH12500 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 SCH12500?
For technical support, including SCH12500 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SCH12500 requirements.
6.How does Aetrix verify that SCH12500 is sourced from the original manufacturer or authorized distributors?
All SCH12500 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 SCH12500 meets industry standards.
7.What is the process for return or replacement of SCH12500?
All SCH12500 units undergo pre-shipment inspection (PSI). If there is an issue with SCH12500, 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 SCH12500 part is unused and in its original packaging.
Return procedure for SCH12500:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SCH12500 Tags
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