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Semtech Corporation 1N5551C.TR
- Part No.:
- 1N5551C.TR
- Manufacturer:
- Semtech Corporation
- Category:
- Single Diodes
- Package:
- Axial
- Datasheet:
-
1N5551C.TR.pdf
- Description:
- DIODE GEN PURP 400V 5A AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:9,499
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Product details
Overview
1N5551C.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 24–40A, and 20mΩ dynamic resistance - deployed in USB Type-C PD input protection and industrial load switch inputs.
For engineers reviewing the 1N5551C.TR datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, DFN-6 package layout guidance, temperature-stable clamping behavior, and direct alternatives for 22V bus protection in high-reliability embedded and USB PD systems.
Technical Context
The 1N5551C.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 across 24–40A and −40°C to +125°C due to decreasing RDS(on) under surge conditions.
It operates with reverse stand-off voltage of 22V, breakdown voltage of 25–27.9V (It = 1mA), and low 175pF junction capacitance at 22V/1MHz - enabling use on high-speed interfaces without signal integrity degradation while maintaining robust 1120W peak pulse power handling.
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 conduction. |
| Clamping Voltage | 27.5–28V at 24–40A (1.2/50μs + 8/20μs 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 mandates without external shielding. |
| Dynamic Resistance | 20mΩ - enables flat clamping response and minimizes voltage overshoot during fast-rising transients. |
| Junction Capacitance | 175pF at 22V, 1MHz - compatible with USB Type-C VBus protection where low-to-moderate capacitance is acceptable. |
Pinout & Package
1N5551C.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). All six terminals must be connected for full 40A surge rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | GND | Common ground return path for surge current; all three must be soldered to PCB ground plane with multiple vias to minimize inductance. |
| Pins 4, 5, 6 | IN | Protected line input (e.g., VBus or load switch input); all three pins are internally paralleled and must be routed as a single low-inductance trace from connector. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.5V across 24–40A and −40°C to +125°C - eliminates derating uncertainty in thermal design. |
| FET-based shunt topology | Replaces PN-junction TVS with <0.1Ω RDS(on) - reduces energy dissipation in silicon and avoids thermal runaway at elevated ambient temperatures. |
| Low dynamic resistance | 20mΩ measured between 1A–40A (8/20μs) - limits voltage overshoot during sub-100ns ESD events and improves system-level immunity margin. |
| DFN-6 footprint | 1.6mm × 1.6mm area - saves >60% board space vs. SO-8 or SOT-23 TVS solutions rated for equivalent 40A surge current. |
Applications
| USB Type-C Power Delivery Input Protection | Industrial Load Switch Input Protection |
|---|---|
|
Use Scenario: Protecting 20–22V VBus lines in USB-C PD ports against lightning-induced surges and contact ESD. IC Role / Device Role / Timing Role: Primary EOS shunt protector placed adjacent to Type-C receptacle, clamping transients before they reach PD controller or e-fuse. Use Value: Maintains 27.5–28V clamping across full temperature range - prevents false overvoltage shutdown and ensures compliance with USB PD 3.1 VBus tolerance (±10%). |
Use Scenario: Safeguarding enable or input pins of industrial-grade load switches (e.g., HS2950P) exposed to field wiring transients. IC Role / Device Role / Timing Role: Front-end transient diverter that routes surge current away from sensitive gate drivers and internal FETs of the load switch. Use Value: Limits clamping voltage to <28V - stays below typical 30V absolute maximum rating of load switch input pins, preventing latch-up or oxide damage. |
| IoT Edge Node Power Bus Protection | Robotic Actuator Control Interface Protection |
|
Use Scenario: Securing 24V auxiliary power rails in battery-powered IoT gateways subjected to EFT bursts and cable discharge events. IC Role / Device Role / Timing Role: Single-device solution for unsymmetrical line protection, replacing multi-component TVS+series resistor networks. Use Value: Delivers ±4kV EFT immunity (IEC 61000-4-4) with no signal distortion - preserves communication integrity on shared 24V supply lines powering sensors and radios. |
Use Scenario: Shielding motor driver enable/control lines in collaborative robots where long harnesses induce coupled surges during motor commutation. IC Role / Device Role / Timing Role: Fast-acting shunt clamp on low-voltage control inputs (e.g., EN, FLT) tied to 22V logic-supply domains. Use Value: 20mΩ dynamic resistance ensures sub-10ns response to dV/dt >5V/ns - suppresses ringing and prevents spurious actuation during EMC testing. |
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, identical marking code "T22" - differs only in reel quantity (3,000 pcs vs. 1N5551C.TR's unspecified quantity). | Same use cases: USB PD, load switch, industrial 22V bus protection. | Select TDS2211P.C when standard 7″ tape-and-reel packaging with known 3k/reel count is required for SMT line planning. |
| uClamp2411ZA.TCT | 24V working voltage, ±30kV ESD, but lower 20A IPP (8/20μs) and higher 33V clamping at 20A - uses standard TVS architecture, not FET-shunt. | Suitable for CC/SBU lines in USB-C; not recommended for main VBus due to higher clamping and temperature sensitivity. | Choose uClamp2411ZA.TCT only for secondary protection on low-current, low-capacitance lines where 22V devices are unavailable or lead-time constrained. |
Compared with 1N5551C.TR, TDS2211P.C offers identical performance and form factor with standardized packaging, while uClamp2411ZA.TCT trades clamping stability and surge capacity for broader availability on low-pin-count lines - making 1N5551C.TR the preferred choice for primary 22V rail protection where flat clamping is critical.
Availability
1N5551C.TR is available at Aetrix Electronics and suitable for USB Type-C PD designs, industrial load switch inputs, and IoT 22V power bus protection requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for 1N5551C.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 analog and mixed-signal ICs for precision sensing, protection, and signal integrity.
The 1N5551C.TR belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered to replace conventional TVS diodes in high-reliability 20–24V systems where temperature-stable clamping and high surge current capability are mandatory.
FAQ
What is the exact package type and dimensions of the 1N5551C.TR?
The 1N5551C.TR is supplied in a RoHS-compliant DFN-6 package measuring 1.6mm × 1.6mm × 0.55mm with 0.5mm pitch. Pin 1 is marked by a laser dot; pins 1–3 are GND, pins 4–6 are IN. The land pattern requires full connection of all six terminals to achieve rated 40A surge performance.
Does the 1N5551C.TR meet IEC 61000-4-5 surge immunity standards?
Yes, the 1N5551C.TR is rated for 40A peak pulse current (8/20μs waveform) and ±1kV combination wave (1.2/50μs voltage + 8/20μs current, RS = 42Ω), satisfying IEC 61000-4-5 Level 4 for industrial environments. Its 27.5–28V clamping ensures protected circuits remain within safe operating limits during test.
How does the clamping behavior of the 1N5551C.TR differ from standard TVS diodes?
Unlike standard TVS diodes whose clamping voltage rises linearly with current (VC = VBR + IPP × RDYN), the 1N5551C.TR uses a triggered FET shunt that maintains ~27.5–28V clamping from 24A to 40A and across −40°C to +125°C - eliminating thermal derating and simplifying system-level surge margin analysis.
Can the 1N5551C.TR be used for protecting USB SuperSpeed differential pairs?
No, the 1N5551C.TR is not suitable for USB SuperSpeed (TX/RX) lines due to its 175pF junction capacitance, which would degrade signal integrity. It is intended for VBus, CC, SBU, or power-switch inputs. For SuperSpeed lines, Semtech recommends low-capacitance devices like RClamp3371ZC (<0.25pF).
What is the maximum operating temperature range for the 1N5551C.TR?
The 1N5551C.TR is specified for continuous operation from −40°C to +125°C ambient temperature. Its clamping voltage remains stable across this full range, and junction temperature may reach +150°C under surge conditions - validated per Absolute Maximum Ratings in the official Semtech datasheet.
1N5551C.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):
- 400 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 @ 400 V
- Capacitance @ Vr, F:
- 92pF @ 5V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- Axial
- Operating Temperature - Junction:
- -
1N5551C.TR FAQ
1.How can I place an order for 1N5551C.TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5551C.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 1N5551C.TR reliable?
The price and inventory of 1N5551C.TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5551C.TR is usually 5 days.
3.What payment methods are accepted for 1N5551C.TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5551C.TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5551C.TR?
1N5551C.TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5551C.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 1N5551C.TR?
For technical support, including 1N5551C.TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5551C.TR requirements.
6.How does Aetrix verify that 1N5551C.TR is sourced from the original manufacturer or authorized distributors?
All 1N5551C.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 1N5551C.TR meets industry standards.
7.What is the process for return or replacement of 1N5551C.TR?
All 1N5551C.TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5551C.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 1N5551C.TR part is unused and in its original packaging.
Return procedure for 1N5551C.TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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