Littelfuse TSB434 - The TSB Series is a totally solid-state, delay-on-break timing module. The TSB series is available with a fixed, external, or onboard adjustable time delay. Time delays from 0.05 to 600 seconds, in 4 standard ranges, cover over 90 % of all OEM and commercial appliance timing applications. The repeat accuracy is ±2 %. Operating voltages of 24, 120, or 230 V ac are available. The TSB’s 1 A steady state, 10 A rated, solid-state output is perfect for direct control of solenoids, contactors, relays, lamps, buzzers, and small heaters. The TSB series can be surface mounted with a single screw, or snapped on a 35 mm DIN rail using the P1023-20 adapter. Operation (Delay-on-Break): Input voltage must be applied before and during timing. Upon closure of the initiate switch, the output energizes. The time delay begins when the initiate switch opens. The output remains energized during timing. At the end of the time delay, the output de-energizes. The output will energize if the initiate switch is closed when input voltage is applied. Reset: Reclosing the initiate switch during timing resets the time delay. Loss of input voltage resets the output and the time delay.
Littelfuse

TSB434

Alternate Item Number: TSB434

UPC: 079458020458

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Overview

The Littelfuse TSB434 is a totally solid-state, delay-on-break timing module designed for precise control in industrial and commercial applications. This module offers a wide time delay range from 0.05 to 600 seconds, available in four standard ranges, covering over 90% of OEM and commercial appliance timing requirements. Its repeat accuracy is a reliable ±2%, ensuring consistent performance. The TSB434 operates on selectable voltages of 24, 120, or 230 VAC, providing flexibility for various power systems. The module features a robust solid-state output capable of handling 1A steady-state current and a 10A inrush current, making it ideal for direct control of solenoids, contactors, relays, lamps, buzzers, and small heaters. Its encapsulated design protects against shock, vibration, and humidity, offering enhanced durability. Installation is versatile, allowing for surface mounting with a single screw or snap-on mounting to a 35 mm DIN rail using the P1023-20 adapter. The delay-on-break operation ensures that the output energizes upon closure of the initiate switch and begins timing when the switch opens, de-energizing at the end of the delay. Resetting is automatic upon reclosing the initiate switch during timing or upon loss of input voltage. With its analog circuitry and solid-state construction, the TSB434 eliminates moving parts, preventing arcing and wear for extended operational life, rated for 100 million operations in typical conditions. Specifications include a time delay tolerance of ±5% factory calibration, ±10% time delay vs. temperature & voltage, and a reset time of ≤ 150ms. The module consumes ≤ 2VA of power and features a voltage drop of approximately 2.5V at 1A. Operating temperature range is -40° to 75°C, with storage at -40° to 85°C, and 95% relative humidity non-condensing. Dimensions are 50.8 mm (H) x 50.8 mm (W) x 30.7 mm (D).
  • Totally solid-state, delay-on-break timing module
  • Wide time delay range: 0.05 to 600 seconds in 4 standard ranges
  • High repeat accuracy of ±2%
  • Available in 24, 120, or 230 VAC operating voltages
  • 1A steady state, 10A rated solid-state output for direct control

Specifications

Brand Name
Littelfuse
Current Rating
1 A steady state, 10 A rated
Material
Solid-state, encapsulated
Mounting
Surface mount with one #10 (M5 x 0.8) screw Mount
Mounting Type
Surface mount (single screw) or 35 mm DIN rail (with P1023-20 adapter)
Number Of Poles
Surface mount with one #10 (M5 x 0.8) screw
Operating Temperature
-40 to 75 F
Operating Temperature, Maximum
75 F
Operating Temperature, Minimum
-40 F
Series
TSB Series
Size
50.8 mm (H) x 50.8 mm (W) x 30.7 mm (D)
Special Features
10Y WARR
Standard
CE/UR/CSA/UL
Sub Brand
SSAC
Voltage Rating
24, 120, or 230 VAC
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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.