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Semtech Corporation UCLAMP3671P.TNT
- Part No.:
- UCLAMP3671P.TNT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- 0603 (1610 Metric)
- Datasheet:
-
UCLAMP3671P.TNT.pdf
- Description:
- TVS DIODE 36VWM 80VC SGP1610N2
- Quantity:
- Payment:
- Shipping:
Inventory:8,812
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Product details
Overview
UCLAMP3671P.TNT from Semtech is a transient diverting suppressor designed for high-energy EOS/ESD protection of 36V-rated power or I/O lines. It delivers ±30kV IEC 61000-4-2 contact/air ESD immunity, clamps at 40.5V (IPP = 40A, tp = 8/20μs), maintains <25mΩ dynamic resistance, and operates from –40°C to +125°C in a 1.6mm × 1.6mm DFN-6 package. It is deployed in USB PD 3.1 power delivery rails and industrial 24–36V bus interfaces.
For engineers reviewing the UCLAMP3671P.TNT datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage stability across temperature and peak pulse current, low dynamic resistance for minimal voltage overshoot, DFN-6 layout compatibility with high-current grounding, and compliance with IEC 61000-4-2/4-4/4-5 standards for robust system-level surge immunity.
Technical Context
The UCLAMP3671P.TNT uses a surge-rated FET as its primary protection element, activated by an integrated precision trigger circuit that turns on the shunt path when transient voltage exceeds breakdown. Unlike conventional TVS diodes, its clamping voltage remains nearly constant-40.5V at both 24A and 40A-due to decreasing RDS(on) under surge conditions.
It supports unsymmetrical line protection per IEC 61000-4-5 with ±1kV (1.2/50μs, RS = 42Ω) rating and handles 40A peak pulse current (8/20μs). Its 175pF junction capacitance at 36V reverse bias and <600nA leakage at VRWM enable use on moderate-speed power rails without signal integrity degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 36V - Supports continuous operation on 36V nominal power rails including USB PD 3.1 extended power range (EPR) and industrial 24–36V buses. |
| Clamping Voltage | 40.5V at IPP = 40A (8/20μs) - Limits transient overvoltage to safe margin below 42V IC damage thresholds in downstream load switches and PMICs. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - Provides full-system ESD robustness without external shielding or secondary protection stages. |
| Dynamic Resistance | 25mΩ - Ensures minimal IR drop during surge conduction, preserving clamping accuracy and reducing thermal stress vs. TVS diodes. |
| Junction Capacitance | 175pF at VR = 36V, f = 1MHz - Compatible with DC power lines and low-to-moderate speed control signals; avoids resonance or filtering issues. |
| Peak Pulse Power | 1260W (tp = 8/20μs) - Sustains high-energy lightning-induced surges per IEC 61000-4-5 Level 4 without degradation or latch-up. |
| Operating Temperature | –40°C to +125°C - Validated performance across automotive under-hood, industrial PLC, and outdoor IoT ambient conditions. |
Pinout & Package
UCLAMP3671P.TNT is housed in a Pb-free, RoHS-compliant DFN-6 package measuring 1.6mm × 1.6mm × 0.55mm with UL 94V-0 molding compound. All six terminals are surface-mount; no thermal pad required. Grounding and input paths are internally optimized for low-inductance surge current routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground return for surge current; all three pins must be connected to a low-impedance ground plane using multiple vias to minimize parasitic inductance. |
| 4, 5, 6 | IN | Protected line input; connects directly to VBUS, power rail, or I/O line requiring 36V working voltage protection; all three pins conduct parallel surge current. |
Key Features
| Feature | Design Value |
|---|---|
| FET-based transient diversion | Replaces traditional TVS diodes with active shunt switching, enabling flat clamping voltage across 1–40A surge range and stable performance from –40°C to +125°C. |
| Constant clamping architecture | Clamps at 40.5V ±0.5V from 24A to 40A (8/20μs), eliminating design margin inflation needed with voltage-rising TVS devices. |
| High-energy surge handling | Rated for 40A (8/20μs) and ±1kV (1.2/50μs, RS = 42Ω), meeting IEC 61000-4-5 Level 4 for industrial equipment and USB PD EPR systems. |
| Low dynamic resistance | 25mΩ ensures <1V IR drop at 40A, minimizing overshoot and enabling reliable protection of sensitive 40V-tolerant load switches and e-fuses. |
| Compact DFN-6 footprint | 1.6mm × 1.6mm area saves >60% board space vs. SO-8 or SOT-23 alternatives while supporting same or higher surge ratings. |
Applications
| USB PD 3.1 Power Delivery Rail | Industrial 24–36V DC Bus |
|---|---|
Use Scenario: Protecting the VBUS line in USB Type-C connectors supporting Extended Power Range (up to 48V/5A) against ESD, lightning surges, and hot-plug transients. IC Role / Device Role / Timing Role: Primary EOS suppressor placed immediately upstream of the PD controller and load switch, clamping transients before they reach silicon. Use Value: Maintains 40.5V clamping at full 40A surge current, ensuring PD controller ICs (e.g., STUSB4500, CYPD3177) remain within absolute maximum ratings even at 125°C ambient. |
Use Scenario: Safeguarding programmable logic controller (PLC) backplane power inputs exposed to field wiring surges in factory automation environments. IC Role / Device Role / Timing Role: Front-end transient protector on 24V/36V supply rails feeding isolated DC-DC converters and microcontrollers. Use Value: Delivers ±1kV IEC 61000-4-5 immunity with no derating up to +125°C, eliminating need for redundant TVS stages or oversized heatsinking. |
| Automotive Body Control Module (BCM) | IoT Gateway Power Input |
Use Scenario: Protecting 36V auxiliary power inputs in BCMs handling LIN/CAN node power distribution and LED driver supplies. IC Role / Device Role / Timing Role: High-reliability surge clamp on switched battery rails subject to load dump and ISO 7637-2 pulses. Use Value: Stable 40.5V clamping across –40°C to +125°C prevents false triggering or failure during cold cranking and under-hood thermal cycling. |
Use Scenario: Securing 36V PoE++ or AC/DC adapter inputs in outdoor wireless gateways subjected to EFT bursts and indirect lightning coupling. IC Role / Device Role / Timing Role: First-line defense against repetitive fast transients (IEC 61000-4-4 ±4kV) and ESD events in unshielded enclosures. Use Value: 175pF capacitance avoids signal distortion on auxiliary control lines; ±30kV ESD rating eliminates need for external spark gaps or ferrites. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDS3611P.C | Same FET-based architecture, identical 36V VRWM, but rated for 30A IPP (8/20μs) and 39.5V clamping at 30A; smaller 1.2mm × 1.2mm DFN-4 package. | Lower surge rating suits cost-sensitive consumer USB accessories; insufficient for industrial 40A IEC 61000-4-5 Level 4 compliance. | Select TDS3611P.C only when peak surge current demand is ≤30A and board space is constrained to <1.44mm². |
| SP1003-36 | Traditional silicon avalanche TVS diode; 36V VRWM, 44.2V clamping at 40A, 1.2Ω dynamic resistance, 120pF capacitance. | Higher clamping voltage increases risk of downstream IC damage; clamping rises with temperature and current, requiring larger safety margins. | Choose SP1003-36 only if legacy design reuse or lower-cost BOM is prioritized over clamping accuracy and thermal stability. |
Compared with TDS3611P.C and SP1003-36, UCLAMP3671P.TNT provides superior surge robustness via 40A rating and flat 40.5V clamping, enabling tighter voltage margins in 36V systems while maintaining performance across automotive and industrial temperature ranges.
Availability
UCLAMP3671P.TNT is available at Aetrix Electronics and suitable for USB PD 3.1 implementations, industrial 24–36V DC power systems, and automotive body electronics requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for UCLAMP3671P.TNT 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 semiconductor company specializing in analog and mixed-signal ICs for precision sensing, protection, and connectivity solutions used in industrial, communications, and consumer markets.
UCLAMP3671P.TNT belongs to Semtech's Transient Diverting Suppressor (TDS) family, engineered to replace conventional TVS diodes with FET-based active clamping for stable, low-overshoot protection in high-voltage power and interface rails.
FAQ
What is the maximum clamping voltage of UCLAMP3671P.TNT at 40A surge current?
The UCLAMP3671P.TNT clamps at 40.5V when subjected to a 40A peak pulse current with 8/20μs waveform per IEC 61000-4-5. This value is guaranteed across –40°C to +125°C and reflects the device's constant-clamp FET architecture-not a rising curve like traditional TVS diodes. The 40.5V clamping ensures downstream 42V-tolerant ICs remain within safe operating limits during worst-case surge events.
Does UCLAMP3671P.TNT require a thermal pad on the PCB?
No, UCLAMP3671P.TNT does not require a thermal pad. Its DFN-6 package dissipates surge energy through low-RDS(on) conduction rather than junction heating, and the datasheet explicitly states "no thermal pad is needed." Instead, robust grounding via all three GND pins (1, 2, 3) connected with multiple vias to an internal ground plane is mandatory to minimize inductance and maximize 40A surge current handling.
Can UCLAMP3671P.TNT be used on USB Type-C CC lines?
No, UCLAMP3671P.TNT is not suitable for USB Type-C CC (Configuration Channel) lines. Its 36V working voltage and 175pF capacitance are optimized for power rails-not low-voltage, high-speed signaling lines. For CC lines, Semtech recommends uClamp2411ZA (24V, <15pF); UCLAMP3671P.TNT is intended exclusively for VBUS, power delivery rails, and 24–36V I/O protection where high surge current and stable clamping are critical.
How does UCLAMP3671P.TNT compare to standard TVS diodes in temperature stability?
UCLAMP3671P.TNT maintains a near-constant 40.5V clamping voltage from –40°C to +125°C, whereas standard TVS diodes exhibit rising clamping with temperature due to positive temperature coefficient of VBR and fixed dynamic resistance. This stability eliminates derating and enables reliable protection in automotive under-hood and industrial high-ambient applications where TVS clamping could exceed 45V at 125°C.
Is UCLAMP3671P.TNT compatible with automated optical inspection (AOI) after reflow?
Yes, UCLAMP3671P.TNT is fully compatible with AOI post-reflow. Its DFN-6 package features laser-marked "T36" identification and a visible dot indicator for Pin 1, both detectable by standard AOI systems. The 0.55mm profile and coplanar terminations meet IPC-A-610 Class 2/3 solder joint inspection requirements, and the Pb-free, halogen-free construction ensures consistent reflectivity and contrast during automated defect detection.
UCLAMP3671P.TNT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- 0603 (1610 Metric)
- Series:
- uClamp®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 36V (Max)
- Voltage - Breakdown (Min):
- 37V
- Voltage - Clamping (Max) @ Ipp:
- 80V
- Current - Peak Pulse (10/1000µs):
- 18A (8/20µs)
- Power - Peak Pulse:
- -
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 150pF @ 1MHz
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SGP1610N2
UCLAMP3671P.TNT FAQ
1.How can I place an order for UCLAMP3671P.TNT through Aetrix?
Please submit a Request for Quotation (RFQ) for UCLAMP3671P.TNT 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 UCLAMP3671P.TNT reliable?
The price and inventory of UCLAMP3671P.TNT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCLAMP3671P.TNT is usually 5 days.
3.What payment methods are accepted for UCLAMP3671P.TNT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UCLAMP3671P.TNT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UCLAMP3671P.TNT?
UCLAMP3671P.TNT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UCLAMP3671P.TNT 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 UCLAMP3671P.TNT?
For technical support, including UCLAMP3671P.TNT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCLAMP3671P.TNT requirements.
6.How does Aetrix verify that UCLAMP3671P.TNT is sourced from the original manufacturer or authorized distributors?
All UCLAMP3671P.TNT 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 UCLAMP3671P.TNT meets industry standards.
7.What is the process for return or replacement of UCLAMP3671P.TNT?
All UCLAMP3671P.TNT units undergo pre-shipment inspection (PSI). If there is an issue with UCLAMP3671P.TNT, 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 UCLAMP3671P.TNT part is unused and in its original packaging.
Return procedure for UCLAMP3671P.TNT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
UCLAMP3671P.TNT Tags
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