Authorized Littelfuse Distributor
Littelfuse TDU3001A - 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 TDU3001A The TDU Series are encapsulated solid-state, delay-on-make timers that combine digital…

Alternate Item Number: TDU3001A

UPC: 079458999983


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Minimum Qty: 10

Multiplier: 10

*Contact for lower quantities*

Call +1 (262) 252-1600 (toll-free 877-268-3700) or email [email protected] for pricing and availability.

Overview

The Littelfuse TDU3001A is an encapsulated solid-state, delay-on-make timer designed for precise timing control in industrial automation and OEM equipment. It features universal voltage operation, accepting 100 to 240 VAC/DC, simplifying installation across various power systems. The TDU3001A offers DIP switch adjustment for accurate selection of time delays within its 1-1023 second range, ensuring first-time setting accuracy without external components. Its totally solid-state and encapsulated construction eliminates moving parts, providing enhanced reliability and protection against shock, vibration, and humidity. The timer boasts a repeat accuracy of +/- 0.5% or 20ms (whichever is greater), critical for applications requiring tight timing tolerances. Operation is delay-on-make: the output is de-energized during the time delay and energizes upon completion, remaining active until input voltage is removed. Reset occurs automatically when input voltage is removed. The TDU3001A is part of the Littelfuse TDU Series, known for durability and accuracy. It can be mounted on a 35mm DIN rail using the P1023-20 DIN Rail Adapter or secured with the P1023-6 Mounting Bracket. Connections are made via 0.25-inch (6.35mm) female quick-connect terminals, with an optional P1015-18 adapter available for screw terminal connections. Applications include process control systems, motor control, and OEM equipment where precise delayed activation is required for safety, synchronization, or efficiency.
  • Encapsulated solid-state, delay-on-make timer
  • Universal voltage operation: 100-240 VAC/DC
  • DIP switch adjustment for precise time delay selection (1-1023 seconds)
  • Repeat accuracy of +/- 0.5% or 20ms (whichever is greater)
  • 0.25-inch (6.35mm) female quick-connect terminals for easy connection

Specifications

Brand Name
Littelfuse
Connection Type
0.25-inch (6.35mm) female quick-connect terminals
Material
Solid-state encapsulated
Material
Encapsulated solid-state
Mounting
Surface mount with one #10 (M5 x 0.8) screw
Mounting
Surface mount with one #10 (M5 x 0.8) screw Mount
Mounting Type
35mm DIN rail (with P1023-20 DIN Rail Adapter) or P1023-6 Mounting Bracket
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
Series
TDU
Special Features
10Y WARR
Standard
CE/UR/CSA
Sub Brand
SSAC
Voltage Rating
Universal (24-240VAC, 12-24VDC)
Voltage Rating
100-240VAC/DC
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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.