My Inquiry
My Account
Semtech Corporation UCLAMP1201P.TCT
- Part No.:
- UCLAMP1201P.TCT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- 0402 (1006 Metric)
- Datasheet:
-
UCLAMP1201P.TCT.pdf
- Description:
- TVS DIODE 12VWM 25VC SLP1006P2
- Quantity:
- Payment:
- Shipping:
Inventory:21,612
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
UCLAMP1201P.TCT from Semtech is a transient diverting suppressor (TDS) designed for high-energy EOS/ESD protection of single 12V I/O or power lines, featuring ±30kV IEC 61000-4-2 ESD immunity, 24A peak pulse current (8/20μs), 175pF junction capacitance, and stable 13.5V clamping voltage across temperature and current range - deployed in USB Type-C, industrial IoT, and load switch input protection.
For engineers reviewing the UCLAMP1201P.TCT datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, validated DFN-6 package layout guidance, real-world clamping behavior under surge conditions, and direct alternative part comparisons for robust system-level EOS hardening.
Technical Context
The UCLAMP1201P.TCT 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 threshold. Unlike conventional TVS diodes, its clamping voltage remains nearly constant due to ultra-low dynamic resistance (20mΩ) and decreasing RDS(on) with rising current.
It operates over –40°C to +125°C, maintains ≤13.5V clamping at 24A (1.2/50μs + 8/20μs combo waveform, RS = 2Ω), and delivers 1120W peak pulse power. Its 175pF capacitance at 12V reverse bias enables compatibility with medium-speed data lines without signal integrity degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 12V - defines maximum continuous DC bus voltage it can protect without leakage or conduction. |
| Clamping Voltage | 13.5V at 24A - ensures protected ICs (e.g., USB PD controllers) remain below damage thresholds during surge events. |
| Peak Pulse Current | 24A (8/20μs) - meets IEC 61000-4-5 Level 3 industrial surge requirements for 12V systems. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds automotive and industrial ESD immunity standards. |
| Junction Capacitance | 175pF at 12V - low enough for USB 2.0 and industrial control lines; avoids signal distortion or timing skew. |
| Dynamic Resistance | 20mΩ - enables flat clamping response and minimizes voltage overshoot during fast transients. |
| Package | DFN-6 (1.6 × 1.6 × 0.55 mm) - supports high-density PCB layouts and thermal dissipation via ground-plane coupling. |
Pinout & Package
UCLAMP1201P.TCT is housed in a RoHS-compliant, halogen-free DFN-6 package (1.6mm × 1.6mm × 0.55mm) with exposed thermal pad (no solder mask defined). All six terminals are surface-mount; pins 1–3 form a common ground connection, while pins 4–6 serve as parallel input terminals for the protected line - requiring simultaneous routing to maximize surge current sharing and minimize inductance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | Ground (GND) | Low-inductance return path; all three must be connected to solid ground plane via multiple vias for full 24A capability. |
| 4, 5, 6 | Input (IN) | Parallel-connected surge input node; connects directly to protected line (e.g., VBUS or CC line); shared current handling improves reliability. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage stays ≤13.5V from 1A to 24A and –40°C to +125°C - eliminates thermal derating uncertainty in industrial environments. |
| FET-based shunt topology | Replaces traditional PN-junction TVS with <0.1Ω RDS(on), reducing energy dissipation in silicon and improving longevity under repeated surges. |
| Low dynamic resistance | 20mΩ measured between 1A–24A (8/20μs) - minimizes voltage overshoot during sub-microsecond ESD events. |
| High-energy surge rating | 1120W peak pulse power (8/20μs) - supports compliance with IEC 61000-4-5 for 12V industrial power rails and USB PD inputs. |
| Ultra-low leakage | ≤600nA at 12V - prevents battery drain in always-on IoT sensors and enables use on standby power domains. |
Applications
| USB Type-C Power Delivery Protection | Industrial IoT Sensor Input Protection |
|---|---|
Use Scenario: Protecting 12V VBUS lines in USB-C ports supporting up to 20V PD negotiation against lightning-induced surges and connector ESD. IC Role / Device Role / Timing Role: Primary EOS shunt suppressor placed immediately at the connector, clamping transients before they reach the PD controller or load switch. Use Value: Maintains 13.5V clamping at full 24A surge - keeps downstream SiP and PMICs within safe operating area without overdesigning IPP margin. |
Use Scenario: Shielding analog sensor inputs (e.g., 4–20mA loop receivers or RS-485 transceivers) in remote industrial meters exposed to field wiring surges. IC Role / Device Role / Timing Role: Front-end transient guard on 12V auxiliary supply rail, absorbing multi-kV transients induced by nearby motor switching or lightning coupling. Use Value: Stable clamping across –40°C to +85°C ambient ensures consistent protection in uncontrolled outdoor enclosures without thermal recalibration. |
| Load Switch Input Hardening | Automotive Body Control Module (BCM) Interface |
Use Scenario: Safeguarding enable and input pins of high-side load switches (e.g., TPS229xx) used in smart lighting or actuator control modules. IC Role / Device Role / Timing Role: Surge limiter placed between power source and load switch VIN/EN, preventing gate oxide damage during hot-plug or cable discharge events. Use Value: 20mΩ dynamic resistance limits voltage rise during 10ns ESD edges - avoids false triggering or latch-up in sensitive CMOS control logic. |
Use Scenario: Protecting LIN or CAN-FD interface power rails (12V nominal) in BCMs against battery dump and load-dump transients per ISO 7637-2. IC Role / Device Role / Timing Role: Secondary protection device on 12V supply feeding LIN transceivers, complementing primary TVS on data lines. Use Value: 175pF capacitance avoids resonance with typical 100nH board traces - preserves signal edge integrity on 20kHz LIN bus timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SP1003-01FTG | Lower working voltage (5.5V), higher capacitance (350pF), ±30kV ESD, but only 12A IPP - no FET-based clamping; uses standard TVS architecture. | Targeted at 5V USB 2.0 data lines, not 12V power rails - unsuitable for VBUS or load switch protection where clamping stability matters. | Select only for low-voltage, high-capacitance-tolerant interfaces; avoid where 12V operation or flat clamping is required. |
| TPD4E001DPYR | Quad-channel 5.5V TVS array, 0.5pF per channel, ±8kV ESD - optimized for high-speed data lines, not power-line surge handling. | Designed for HDMI/USB 3.x differential pairs; lacks single-line surge rating, thermal robustness, or 12V standoff capability. | Use exclusively for signal-line ESD; never substitute for UCLAMP1201P.TCT in power-rail protection roles. |
Compared with SP1003-01FTG and TPD4E001DPYR, UCLAMP1201P.TCT uniquely delivers 12V standoff, 24A surge capacity, and FET-based constant clamping - making it the only viable option for industrial 12V bus protection where thermal stability and precise voltage limiting are mandatory.
Availability
UCLAMP1201P.TCT is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial IoT sensor nodes, and automotive body control modules requiring stable component supply, long-term lifecycle support, and traceable sourcing for production programs.
Supply support for UCLAMP1201P.TCT 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, power management, and transient protection.
The UCLAMP series targets high-reliability EOS protection in space-constrained, thermally demanding applications - engineered specifically to replace legacy TVS diodes where clamping voltage drift, temperature sensitivity, or surge endurance limit system robustness.
FAQ
What is the maximum continuous operating voltage for UCLAMP1201P.TCT?
The UCLAMP1201P.TCT has a reverse stand-off voltage (VRWM) of 12V, meaning it can safely operate on DC power rails up to 12V without leakage or unintended conduction. This value is confirmed in the Absolute Maximum Ratings table and Electrical Characteristics section of the official Semtech datasheet Rev 2.5.
Does UCLAMP1201P.TCT meet IEC 61000-4-5 surge immunity standards?
Yes, UCLAMP1201P.TCT is rated for 24A peak pulse current under the IEC 61000-4-5 8/20μs waveform, which satisfies Level 3 (1kV, RS = 42Ω) for 12V systems. Its 1120W peak pulse power rating and stable clamping behavior across temperature further validate its suitability for industrial surge compliance testing.
How does UCLAMP1201P.TCT differ from standard TVS diodes in clamping performance?
Unlike standard TVS diodes whose clamping voltage rises linearly with current (VC = VBR + IPP × RDYN), UCLAMP1201P.TCT uses a surge-rated FET with decreasing RDS(on), delivering near-constant 13.5V clamping from 1A to 24A. This eliminates thermal derating uncertainty and ensures predictable protection across operating conditions.
What is the recommended PCB layout for UCLAMP1201P.TCT to achieve full 24A surge capability?
To achieve full 24A rating, all three GND pins (1–3) must connect to a solid ground plane using ≥4 thermal vias, and all three IN pins (4–6) must be routed as a single low-inductance trace directly from the protected connector. Placement within 3mm of the entry point is critical - per Semtech's layout guidelines in Figure 7 of the UCLAMP1201P.TCT datasheet.
Is UCLAMP1201P.TCT compatible with lead-free reflow processes?
Yes, UCLAMP1201P.TCT is fully compatible with standard lead-free reflow profiles (J-STD-020), as confirmed by its Pb-free, halogen-free, RoHS/WEEE-compliant construction and UL 94V-0 molding compound. The DFN-6 package withstands peak temperatures up to 260°C for 30 seconds without degradation.
UCLAMP1201P.TCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- 0402 (1006 Metric)
- Series:
- uClamp®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 12V (Max)
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 25V
- Current - Peak Pulse (10/1000µs):
- 8A (8/20µs)
- Power - Peak Pulse:
- 200W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 60pF @ 1MHz
- Operating Temperature:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SLP1006P2
UCLAMP1201P.TCT FAQ
1.How can I place an order for UCLAMP1201P.TCT through Aetrix?
Please submit a Request for Quotation (RFQ) for UCLAMP1201P.TCT 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 UCLAMP1201P.TCT reliable?
The price and inventory of UCLAMP1201P.TCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCLAMP1201P.TCT is usually 5 days.
3.What payment methods are accepted for UCLAMP1201P.TCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UCLAMP1201P.TCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UCLAMP1201P.TCT?
UCLAMP1201P.TCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UCLAMP1201P.TCT 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 UCLAMP1201P.TCT?
For technical support, including UCLAMP1201P.TCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCLAMP1201P.TCT requirements.
6.How does Aetrix verify that UCLAMP1201P.TCT is sourced from the original manufacturer or authorized distributors?
All UCLAMP1201P.TCT 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 UCLAMP1201P.TCT meets industry standards.
7.What is the process for return or replacement of UCLAMP1201P.TCT?
All UCLAMP1201P.TCT units undergo pre-shipment inspection (PSI). If there is an issue with UCLAMP1201P.TCT, 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 UCLAMP1201P.TCT part is unused and in its original packaging.
Return procedure for UCLAMP1201P.TCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
UCLAMP1201P.TCT Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
