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Semtech Corporation 1N5550C.TR
- Part No.:
- 1N5550C.TR
- Manufacturer:
- Semtech Corporation
- Category:
- Single Diodes
- Package:
- Axial
- Datasheet:
-
1N5550C.TR.pdf
- Description:
- DIODE GEN PURP 200V 5A AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:3,615
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Product details
Overview
1N5550C.TR from Semtech is a transient diverting suppressor (TDS) designed for high-energy EOS protection of 22V-rated I/O or power 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 - deployed in USB Type-C PD input protection and industrial load switch front-end circuits.
For engineers reviewing the 1N5550C.TR datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, DFN-6 package layout guidance, real-world clamping stability data across temperature and current, and validated alternatives for 22V bus protection design.
Technical Context
The 1N5550C.TR 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 (27.5–28V) across 24–40A IPP and −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 at 1mA, and exhibits low 175pF junction capacitance at 22V/1MHz - enabling use on high-speed 22V power rails without signal integrity degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - defines maximum continuous DC operating voltage of protected line without leakage or conduction. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs + 1.2/50μs combo waveform) - ensures downstream 22V-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 (IEC 61000-4-2) - exceeds automotive and industrial ESD robustness requirements for external connectors. |
| Dynamic Resistance | 20mΩ - enables stable clamping independent of current magnitude, unlike TVS diodes whose VC rises linearly with IPP. |
| Junction Capacitance | 175pF at 22V/1MHz - low enough for 22V power rail protection without compromising transient response or causing resonance. |
Pinout & Package
1N5550C.TR is housed in a Pb-free, RoHS-compliant DFN-6 package measuring 1.6mm × 1.6mm × 0.55mm with exposed thermal pad (no internal thermal pad required; energy dissipated in silicon). All six terminals must be connected per functional role to achieve rated 40A surge performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground return path for surge current; all three pins must be connected to low-inductance ground plane via multiple vias. |
| 4, 5, 6 | IN | Protected line input (e.g., VBUS in USB-C); all three pins are internally paralleled and must be shorted externally to maximize current sharing and minimize trace inductance. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.5V across full 24–40A IPP range and −40°C to +125°C - eliminates derating uncertainty in thermal design. |
| FET-based shunt protection | Surge energy diverted through low-RDS(on) MOSFET instead of PN-junction avalanche, reducing thermal stress and improving reliability vs. TVS diodes. |
| High EFT immunity | ±4kV per IEC 61000-4-4 (5/50ns, 5kHz & 100kHz) - protects against repetitive fast transients common in motor drives and industrial PLCs. |
| Low leakage | ≤600nA at 22V - prevents measurable power loss in always-on 22V battery-backed or IoT sensor rails. |
Applications
| USB Type-C Power Delivery Input Protection | Industrial Load Switch Front-End Protection |
|---|---|
|
Use Scenario: Protecting VBUS line in USB-C receptacles supporting up to 20V/5A PD negotiation, exposed to ESD from hot-plug events and lightning-induced surges on cables. IC Role / Device Role / Timing Role: Primary EOS shunt protector placed immediately after connector, clamping transients before reaching PD controller and load switch ICs. Use Value: Maintains 27.5–28V clamping across temperature - avoids overvoltage damage to 22V-max PD controllers where traditional TVS would exceed 35V at 125°C. |
Use Scenario: Safeguarding input of industrial-grade load switches (e.g., HS2950P) in remote meters, robotics, and factory automation equipment subjected to 40A surge events. IC Role / Device Role / Timing Role: First-line transient diverter on VIN rail, limiting voltage seen by load switch's internal FET gate oxide and drain-source junction. Use Value: Prevents catastrophic failure of load switch due to VDS overvoltage by holding clamp <28V - well below typical 30V absolute max ratings of industrial e-fuses. |
| IoT Device Power Rail Protection | Storage Device 22V Backup Supply Protection |
|
Use Scenario: Securing 22V auxiliary power inputs in battery-powered edge sensors and gateway modules operating in uncontrolled environments (e.g., outdoor smart meters). IC Role / Device Role / Timing Role: Standalone EOS suppressor on main power entry point, replacing bulkier multi-stage protection schemes. Use Value: 1.6×1.6mm footprint saves >60% board area vs. discrete TVS+MOV solutions while delivering superior clamping consistency and ESD margin. |
Use Scenario: Protecting 22V supercapacitor or LiFePO4 backup supply rails in enterprise SSDs and NAS enclosures against ESD during service and surge from shared AC adapters. IC Role / Device Role / Timing Role: Low-capacitance (175pF), low-leakage protector ensuring backup rail integrity without loading or degrading hold-up time. Use Value: Enables reliable 22V backup operation with <600nA leakage - extends shelf life and runtime of storage devices in standby mode. |
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; 22V VRWM, 35.5V VC @ 12.3A; higher clamping voltage, no constant-clamp behavior. | Acceptable for lower-energy surges (<15A) where 35.5V clamping is within downstream IC tolerance. | Select SMAJ22A only if cost sensitivity outweighs clamping precision and thermal stability requirements. |
| TDS2211P.C | Same die, identical electrical specs, but in tape-and-reel packaging (3,000 pcs/reel); pinout, footprint, and marking code (T22) match 1N5550C.TR. | No functional difference; used interchangeably in production where reel format is preferred. | TDS2211P.C is a direct form-fit-function replacement with identical performance - ideal for volume procurement. |
Compared with SMAJ22A and TDS2211P.C, the 1N5550C.TR offers unique constant-clamp behavior critical for 22V systems with tight voltage margins, while TDS2211P.C provides identical performance in alternate packaging - making 1N5550C.TR optimal for prototyping and mixed-BOM builds requiring cut-tape delivery.
Availability
1N5550C.TR is available at Aetrix Electronics and suitable for USB Type-C PD interfaces, industrial load switch inputs, and 22V IoT power rails requiring stable component supply, consistent surge performance, and RoHS-compliant DFN packaging.
Supply support for 1N5550C.TR 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 ICs for precision sensing, protection, and signal integrity.
The 1N5550C.TR belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered specifically to replace conventional TVS diodes in 12–36V power rail protection where stable clamping and temperature-invariant surge handling are mandatory.
FAQ
What is the clamping voltage of the 1N5550C.TR at 40A surge current?
The 1N5550C.TR clamps at 27.5–28V under IEC 61000-4-5 combination waveform (1.2/50μs voltage + 8/20μs current, RS = 2Ω) at 40A peak pulse current. This value is guaranteed across −40°C to +125°C and reflects its FET-based constant-clamp architecture - not a fixed VBR + IPP×RDYN relationship like standard TVS diodes. The 1N5550C.TR maintains this narrow clamping window due to decreasing RDS(on) under surge conditions.
Is the 1N5550C.TR pin-compatible with SMAJ22A or other SMA-package TVS diodes?
No, the 1N5550C.TR is not pin-compatible with SMAJ22A or any SMA/SMB/SMC-package TVS diodes. It uses a 6-pin DFN-1616 package (1.6mm × 1.6mm) with three parallel input pins (4–6) and three parallel ground pins (1–3), whereas SMAJ22A is a 2-pin DO-214AC device. PCB layout, trace routing, and thermal land pattern must be redesigned to accommodate the 1N5550C.TR's DFN footprint and multi-pin parallel configuration.
Can the 1N5550C.TR protect bidirectional data lines such as USB DP/DM?
No, the 1N5550C.TR is designed exclusively for unidirectional 22V power rail or I/O line protection (e.g., VBUS, load switch input). Its internal architecture - a grounded-shunt FET triggered by overvoltage - does not support bidirectional signal clamping. For USB SuperSpeed DP/DM lines, Semtech recommends low-capacitance TVS devices like RClamp3371ZC (<0.25pF), not the 1N5550C.TR.
Does the 1N5550C.TR require a thermal pad or heatsink on the PCB?
No, the 1N5550C.TR does not require an external thermal pad or heatsink. Its DFN package dissipates surge energy directly into the silicon die during transient events, and the datasheet explicitly states "no thermal pad is needed." Instead, design focus should be on low-inductance grounding: connect all GND pins (1–3) to a solid ground plane using multiple vias, and place the 1N5550C.TR as close as possible to the protected connector.
What is the maximum operating temperature range for the 1N5550C.TR?
The 1N5550C.TR is rated for continuous operation from −40°C to +125°C ambient temperature, with junction temperature capability up to +150°C. Crucially, its clamping voltage remains stable across this full range - varying by less than 0.5V from −40°C to +125°C at 40A - a key differentiator from TVS diodes whose clamping degrades significantly at elevated temperatures. This makes the 1N5550C.TR suitable for under-hood automotive modules and industrial control cabinets.
1N5550C.TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Series:
- -
- Package/Case:
- Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 200 V
- Current - Average Rectified (Io):
- 5A
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 3 A
- Speed:
- Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 2 µs
- Current - Reverse Leakage @ Vr:
- 1 µA @ 200 V
- Capacitance @ Vr, F:
- 92pF @ 5V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- Axial
- Operating Temperature - Junction:
- -
1N5550C.TR FAQ
1.How can I place an order for 1N5550C.TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5550C.TR 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 1N5550C.TR reliable?
The price and inventory of 1N5550C.TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5550C.TR is usually 5 days.
3.What payment methods are accepted for 1N5550C.TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5550C.TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5550C.TR?
1N5550C.TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5550C.TR 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 1N5550C.TR?
For technical support, including 1N5550C.TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5550C.TR requirements.
6.How does Aetrix verify that 1N5550C.TR is sourced from the original manufacturer or authorized distributors?
All 1N5550C.TR 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 1N5550C.TR meets industry standards.
7.What is the process for return or replacement of 1N5550C.TR?
All 1N5550C.TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5550C.TR, 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 1N5550C.TR part is unused and in its original packaging.
Return procedure for 1N5550C.TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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