Littelfuse TDUL3001A - The TDU Series are encapsulated solid-state, delay-on-make timers that combine digital timing circuitry with universal voltage operation. The TDU offers DIP switch adjustment allowing accurate selection of the time delay over the full time delay range. This series is an excellent choice for process control systems and OEM equipment. Operation (Delay-on-Make): Upon application of input voltage, the time delay begins. The output is de-energized before and during the time delay. At the end of the time delay, the output energizes and remains energized until input voltage is removed. Reset: Removing input voltage resets the time delay and output.
Littelfuse

TDUL3001A

Alternate Item Number: TDUL3001A

UPC: 079458007336

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Minimum Qty: 10

Multiplier: 10

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Overview

The Littelfuse TDUL3001A, part of the TDU Series, is a highly reliable encapsulated solid-state delay-on-make timer designed for demanding industrial applications. This timer integrates advanced digital timing circuitry with universal voltage operation, offering exceptional versatility for a wide range of system requirements. Its robust, encapsulated construction protects against shock, vibration, and humidity, ensuring long-term performance in harsh environments. The TDUL3001A features precise DIP switch adjustment, allowing for accurate and repeatable selection of time delays across its 0.1 to 10-second range. This precision is critical for applications where exact timing sequences are paramount. Operating on a delay-on-make principle, the TDUL3001A initiates its timing sequence upon the application of input voltage. During this delay period, the output remains de-energized. Once the preset time has elapsed, the output energizes and stays active until the input voltage is removed, at which point the timer resets automatically. This operational mode is ideal for controlling sequential operations, preventing simultaneous activation of components, or allowing systems to stabilize before engaging critical functions. Key features and benefits of the Littelfuse TDU Series, including the TDUL3001A, include: * **Universal Input Voltage:** Operates from 100 to 240VAC/DC, simplifying inventory and application compatibility. * **Precise DIP Switch Adjustment:** Enables accurate, first-time setting of time delays, reducing setup time and potential errors. * **Microcontroller-Based Design:** Ensures consistent and reliable timing performance. * **Solid-State and Encapsulated:** Offers superior durability with no moving parts to wear out, and protection against environmental factors. * **High Repeat Accuracy:** Achieves +/- 0.5% or 20ms accuracy (whichever is greater) for dependable operation. * **Delay-on-Make Operation:** Ensures controlled activation after a specified delay. This timer is an excellent choice for process control systems, OEM equipment, automation solutions, and any application requiring controlled timing sequences. Its universal voltage capability and precise adjustment make it a versatile component for engineers and technicians. Littelfuse is a trusted manufacturer known for its high-quality industrial components, and the TDU Series timers exemplify their commitment to reliability and performance. The TDUL3001A's ability to provide accurate, repeatable timing in a durable, encapsulated package makes it an indispensable tool for modern industrial automation.
  • Encapsulated solid-state delay-on-make timer
  • Universal input voltage: 100 to 240VAC/DC
  • Adjustable time range: 0.1 to 10 seconds
  • DIP switch adjustment for precise timing control
  • Ideal for process control systems and OEM equipment

Specifications

Brand Name
Littelfuse
Mounting
Surface mount with one #10 (M5 x 0.8) screw Mount
Number Of Poles
Surface mount with one #10 (M5 x 0.8) screw
Operating Temperature
-40 to 60 F
Operating Temperature, Maximum
60 F
Operating Temperature, Minimum
-40 F
Series
TDU Series
Special Features
10Y WARR
Standard
CE/UR/CSA
Sub Brand
SSAC
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Frequently Asked Questions about Littelfuse

What certifications and standards do Littelfuse products comply with?

Littelfuse products are certified to multiple international standards, including UL (Underwriters Laboratories), CSA (Canadian Standards Association), CCC (China Compulsory Certification), and EAC (Eurasian Conformity). Customers can verify specific product certifications by consulting individual product datasheets on Littelfuse.com, which provide comprehensive details about standards compliance for each component.

What industries and applications are Littelfuse products used for?

Littelfuse products are critical for electrical protection and safety across multiple industrial sectors, including manufacturing, automation, power distribution, and electrical control systems. Their comprehensive product portfolio serves industries that require robust electrical protection, including motor and pump applications, solar installations, programmable logic controllers (PLCs), electrical switch panels, and critical infrastructure environments. Key product lines protect against overcurrent, voltage transients, ground faults, and temperature-related electrical risks, ensuring equipment safety and operational reliability.

What technical support does Littelfuse offer?

Littelfuse offers comprehensive technical support through multiple channels. Their Technical Hotline (800-TEC-FUSE) provides direct access to engineers who can help identify issues and recommend solutions. Additionally, Littelfuse offers extensive online Technical Resources at Littelfuse.com, including datasheets, product manuals, whitepapers, application guides, and online design tools. Their experienced product and application engineers also provide step-by-step support from design to installation.

What are the main product lines offered by Littelfuse?

Littelfuse offers comprehensive industrial protection and control product lines, including fuses, fuse holders, protection relays, temperature sensors, and electrical safety components. Their key product categories span surge protective devices, custom OEM products, electrical switch panels, medium voltage fuses, ground-fault protection relays, motor and pump protection devices, and temperature sensors. These products are designed to minimize electrical safety hazards, limit equipment damage, improve productivity, and safeguard personnel from electrical faults.

What are the key features of Littelfuse products?

Littelfuse products feature exceptional circuit protection technologies with key characteristics including UL/IEC safety standard compliance, low internal resistance, and advanced protective capabilities across multiple product lines. Their components provide critical protection for industrial systems, offering features like overcurrent protection, voltage transient suppression, and resettable protection devices with ultra-low resistance and compact designs. Key product lines include fuses, metal oxide varistors (MOVs), TVS diodes, PolySwitch devices, and specialized electronic protection components that enhance system reliability and safety.

What environmental ratings do Littelfuse products have?

Littelfuse products feature comprehensive environmental ratings, including NEMA Type 1, 2, 3, 3R, 4/4X, 12, and 13 certifications, as well as IP65 protection. These ratings ensure superior protection in diverse industrial environments, with an operating temperature range of -40°F to +131°F (-40°C to +55°C). Many products also include UV-stabilized materials and neoprene gaskets for enhanced durability in outdoor and challenging conditions.

What accessories are available for Littelfuse products?

Littelfuse offers several key accessories across their product lines, including fuse holders, voltage monitoring modules, and terminal connectors. Specific accessories include the LPSM003ZXID (indicating) and LPSM003Z (non-indicating) POWR-SAFE Dead Front fuse holders for Class CC and Midget-Style fuses, the VRM6048 voltage monitor accessory module, and female quick connect terminals (P1015 series) in various wire gauge sizes. These accessories are designed to enhance protection, monitoring, and connectivity for Littelfuse electrical components.

What is Littelfuse's warranty policy?

Littelfuse provides comprehensive warranty details on their official website at www.littelfuse.com/warranty. Customers should visit this page to review the specific warranty terms and conditions for their specific product lines. For direct warranty support or questions, customers can contact Littelfuse Technical Support at 1-800-TEC-FUSE or email [email protected].

What communication protocols do Littelfuse products support?

Littelfuse supports a comprehensive range of industrial communication protocols, including PROFIBUS, PROFINET, EtherNet/IP, DeviceNet, Modbus RTU, and CANopen. Our products provide flexible connectivity solutions across multiple industrial automation platforms, enabling seamless integration with various control systems and network architectures.

How are Littelfuse products typically installed?

Littelfuse products are typically installed using specialized mounting hardware like fuse holders, blocks, and panels designed for specific industrial applications. The POWR-SAFE Dead Front holders, for example, provide optimum protection for Class CC and Midget-Style fuses, supporting installations up to 600 VAC/DC. Installation often involves using precision terminals with strain relief, such as 0.25 in. female quick connect terminals, to ensure secure and safe electrical connections in industrial control systems.