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Semtech Corporation 1N5554C.TR
- Part No.:
- 1N5554C.TR
- Manufacturer:
- Semtech Corporation
- Category:
- Single Diodes
- Package:
- Axial
- Datasheet:
-
1N5554C.TR.pdf
- Description:
- DIODE GEN PURP 1KV 5A AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:9,418
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Product details
Overview
1N5554C.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 ultra-low 20mΩ dynamic resistance - deployed in USB Type-C PD input protection and industrial load switch front-end circuits.
For engineers reviewing the 1N5554C.TR datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, DFN-6 package layout guidance, real-world clamping stability across temperature and current, and direct alternatives for 22V bus protection in USB PD, IoT, and industrial equipment designs.
Technical Context
The 1N5554C.TR implements a surge-rated FET shunt architecture with a precision trigger circuit - unlike conventional TVS diodes, its clamping voltage remains nearly constant (27.5–28V) from 24A to 40A and across −40°C to +125°C due to decreasing RDS(on) under surge conditions.
It operates as a single-line protector with bidirectional conduction capability, grounded via three dedicated GND pins (1–3) and connected to the protected line via three parallel IN pins (4–6), enabling low-inductance, high-current transient diversion without thermal pad requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V reverse stand-off - supports continuous operation on 20V USB PD VBUS and industrial 24V rails without leakage-induced stress. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs + 1.2/50μs combo wave) - stays below 29V across full rated current and temperature range, protecting 30V-tolerant controllers. |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Level 4 (±1kV, RS = 42Ω) for industrial surge immunity. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds USB IF and industrial ESD immunity requirements without derating. |
| Dynamic Resistance | 20mΩ (measured 1–40A, 8/20μs) - enables stable clamping by minimizing IR drop increase under rising current. |
| Junction Capacitance | 175pF at 22V, 1MHz - suitable for DC/low-speed power and control lines; not intended for >100MHz signal paths. |
Pinout & Package
1N5554C.TR is housed in a RoHS-compliant DFN-6 package measuring 1.6mm × 1.6mm × 0.55mm with exposed pad-less construction and UL 94V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground terminals - all three must be connected to minimize inductance and maximize 40A surge current handling. |
| 4, 5, 6 | IN | Parallel-connected input terminals - tied directly to protected line (e.g., VBUS or load switch input); equalizes current sharing and reduces trace inductance. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.5V from 24A to 40A - eliminates need for over-spec'ed IPP rating to meet voltage margin targets. |
| Temperature-stable protection | Clamping holds 27–28V from −40°C to +125°C - removes thermal derating calculations required for standard TVS diodes. |
| Low dynamic resistance | 20mΩ enables <1V IR drop at 40A - critical for maintaining safe voltage margins on sensitive downstream FETs and controllers. |
| High-energy surge rating | 1120W peak pulse power (8/20μs) - sustains repeated 40A transients without parametric shift or failure. |
Applications
| USB Type-C Power Delivery Input Protection | Industrial Load Switch Front-End Protection |
|---|---|
Use Scenario: Protecting 20V–22V VBUS lines in USB-C PD ports against lightning surges, ESD, and system-level EOS events. IC Role / Device Role / Timing Role: Transient diverting suppressor placed between connector and PD controller/load switch, clamping transients before they reach IC inputs. Use Value: Maintains 27.5–28V clamping across full temperature and current range - prevents overvoltage damage to 30V-rated PD controllers without thermal derating. |
Use Scenario: Safeguarding enable and input pins of industrial-grade load switches (e.g., HS2950P) in remote meters, robotics, and factory automation. IC Role / Device Role / Timing Role: Primary front-end surge diverter that routes 40A transients to ground before reaching the load switch's internal FET gate or drain. Use Value: Keeps clamping voltage below 29V at 40A - avoids gate oxide breakdown or drain-source avalanche in 30V-rated load switches during surge events. |
| IoT Device Power Rail Protection | Storage Device 24V Backup Supply Protection |
Use Scenario: Securing 22V auxiliary power inputs in battery-backed IoT gateways and edge sensors exposed to field-installed cabling. IC Role / Device Role / Timing Role: Single-line TDS device absorbing multi-kV EFT bursts and contact ESD per IEC 61000-4-4/-4-2 on unshielded power entry points. Use Value: Delivers ±4kV EFT immunity and ±30kV ESD robustness in 1.6mm² footprint - enables compact, certified industrial IoT designs without external RC filters. |
Use Scenario: Protecting 24V backup supply inputs in enterprise SSDs and NAS enclosures against power rail transients during hot-swap or grid switching. IC Role / Device Role / Timing Role: Standoff-rated suppressor placed upstream of DC-DC converters and PMICs to prevent latch-up or overvoltage shutdown. Use Value: 22V VRWM ensures no leakage at nominal 24V rail; 27.5V clamping prevents converter input overvoltage while allowing normal 20–24V operation. |
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 clamping at 12.9A (8/20μs); 100pF capacitance; no constant-clamp behavior. | Higher clamping voltage increases risk of downstream IC damage at elevated temperatures or currents; suited for lower-energy, cost-sensitive designs. | Select SMAJ22A only when peak surge current ≤15A and ambient temperature remains <85°C - not recommended for USB PD or industrial 40A surge compliance. |
| TDS2211P.C | Same die, identical electrical specs, and DFN-6 package - differs only in reel packaging (3,000 pcs vs. 1N5554C.TR's tape-and-reel quantity). | No functional or layout difference; fully interchangeable in schematic and PCB layout. | 1N5554C.TR and TDS2211P.C are functionally identical - selection depends solely on order quantity and logistics preference. |
Compared with SMAJ22A, 1N5554C.TR delivers 8V lower clamping at rated current and stable performance across temperature, while TDS2211P.C offers identical protection in alternate packaging - making 1N5554C.TR optimal for high-reliability 22V bus protection where clamping consistency is critical.
Availability
1N5554C.TR is available at Aetrix Electronics and suitable for USB Type-C PD interfaces, industrial load switch inputs, and IoT power rail protection requiring stable component supply, long-term lifecycle support, and guaranteed RoHS/REACH compliance.
Supply support for 1N5554C.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 semiconductors for power management, protection, and signal integrity.
The 1N5554C.TR belongs to Semtech's Transient Diverting Suppressor (TDS) product line - engineered specifically to replace conventional TVS diodes in high-energy, temperature-critical 22V bus protection applications.
FAQ
What is the maximum operating temperature for the 1N5554C.TR?
The 1N5554C.TR is rated for continuous operation from −40°C to +125°C ambient temperature. Its clamping voltage remains stable within 27.5–28V across this full range, and junction temperature is specified up to +150°C - enabling use in sealed industrial enclosures and automotive under-hood adjacent environments without thermal derating.
Does the 1N5554C.TR require a thermal pad on the PCB?
No, the 1N5554C.TR does not require a thermal pad. Unlike power MOSFETs or high-power TVS devices, it dissipates surge energy primarily through low-RDS(on) conduction rather than junction heating; the datasheet explicitly states "no thermal pad is needed" and confirms energy dissipation occurs within the device structure without relying on copper area for thermal relief.
Can the 1N5554C.TR be used for bidirectional signal line protection?
No, the 1N5554C.TR is designed exclusively for unidirectional DC power or I/O line protection - its internal FET-based architecture operates only from IN to GND. For bidirectional data lines (e.g., USB DP/DM), Semtech recommends low-capacitance TVS devices like RClamp3371ZC, not the 1N5554C.TR.
How many ground connections does the 1N5554C.TR require for full 40A rating?
The 1N5554C.TR requires all three GND pins (pins 1, 2, and 3) to be connected to a low-inductance ground plane to achieve its full 40A peak pulse current rating. Leaving any GND pin unconnected degrades surge current handling and may cause localized overheating or clamping voltage rise due to increased parasitic inductance.
Is the 1N5554C.TR compatible with automated SMT assembly processes?
Yes, the 1N5554C.TR uses a standard DFN-6 footprint (1.6mm × 1.6mm) with J-lead–less terminations and Pb-free, halogen-free plating - fully compatible with reflow soldering per IPC/JEDEC J-STD-020, including peak temperatures up to 260°C. Land pattern recommendations are provided in the official Semtech datasheet.
1N5554C.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):
- 1000 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 @ 1000 V
- Capacitance @ Vr, F:
- 92pF @ 5V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- Axial
- Operating Temperature - Junction:
- -
1N5554C.TR FAQ
1.How can I place an order for 1N5554C.TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5554C.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 1N5554C.TR reliable?
The price and inventory of 1N5554C.TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5554C.TR is usually 5 days.
3.What payment methods are accepted for 1N5554C.TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5554C.TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5554C.TR?
1N5554C.TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5554C.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 1N5554C.TR?
For technical support, including 1N5554C.TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5554C.TR requirements.
6.How does Aetrix verify that 1N5554C.TR is sourced from the original manufacturer or authorized distributors?
All 1N5554C.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 1N5554C.TR meets industry standards.
7.What is the process for return or replacement of 1N5554C.TR?
All 1N5554C.TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5554C.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 1N5554C.TR part is unused and in its original packaging.
Return procedure for 1N5554C.TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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