Littelfuse FS143 - The FS100 Series (medium power) may be used to control inductive, incandescent, or resistive loads. Input voltages of 24, 120, or 230VAC are available. Fixed flash rates in stock range from 30, 50, 60, and 90 FPM, with custom flash rates ranging from 10 to 300 FPM. Encapsulation provides protection against shock, vibration, and humidity. This group of solid-state flashers has proven reliability with years of use throughout the world.
Littelfuse

FS143

Alternate Item Number: FS143

UPC: 079458993400


Documents & Media
BrochureSpecification Sheet

Contact for Pricing

Minimum Qty: 10

Multiplier: 10

*Contact for lower quantities*

Overview

The Littelfuse FS143 solid-state flasher (SKU: FS143) from the FS100 Series is a medium-power device designed to control inductive, incandescent, or resistive loads. It supports input voltages of 24VAC, 120VAC, or 230VAC, making it versatile for global applications. The FS143 offers fixed flash rates of 30, 50, 60, and 90 FPM, with customizable options ranging from 10 to 300 FPM to meet specific signaling requirements. Its robust encapsulation ensures protection against shock, vibration, and humidity, delivering reliable performance in harsh industrial environments. With a proven track record of global usage, this solid-state flasher is ideal for applications requiring consistent and dependable operation, such as industrial machinery, automotive systems, and signaling devices. The FS143 is manufactured in the US and carries the UNSPSC code 39122333.
  • Controls inductive, incandescent, or resistive loads
  • Input voltages: 24VAC, 120VAC, or 230VAC
  • Fixed flash rates: 30, 50, 60, 90 FPM; custom: 10-300 FPM
  • Encapsulated for shock, vibration, and humidity resistance
  • Manufactured in the US with UNSPSC code 39122333

Specifications

Brand Name
Littelfuse
Connection
Surface mount with one #10 (M5 x 0.8) screw
Material
Solid-state
Mounting
Surface mount with one #10 (M5 x 0.8) screw Mount
Operating Temperature
-20 to 60 F
Operating Temperature, Maximum
60 F
Operating Temperature, Minimum
-20 F
Series
FS100
Series
FS100 Series
Special Features
10Y WARR
Standard
CE/UR/CSA
Sub Brand
SSAC
Voltage Rating
24/120/230 VAC
The FS300 Series of solid-state flashers were specifically designed to operate lamp loads. Their two-terminal series connection feature makes installation easy. The high immunity to line noise and transients makes the FS300 Series ideal for moving vehicle applications. All solid-state construction means reliability and long life. The FS300 Series offers a factory fixed flash rate of 75 FPM or may be ordered with a fixed, custom flash rate ranging from 60 to 150 FPM. Operation: Upon application of input voltage, the T2 OFF time begins. At the end of the OFF time, the T1 ON time begins and the load energizes. At the end of T1, T2 begins and the load de-energizes. This cycle repeats until input voltage is removed. Reset: Removing input voltage resets the output and the sequence to T2.

FS312

The FS300 Series of solid-state flashers were specifically designed to operate lamp loads. Their two-terminal series connection feature makes installation easy. The high immunity to line noise and transients makes the FS300 Series ideal for moving vehicle applications. All solid-state construction means reliability and long life. The FS300 Series offers a factory fixed flash rate of 75 FPM or may be ordered with a fixed, custom flash rate ranging from 60 to 150 FPM. Operation: Upon application of input voltage, the T2 OFF time begins. At the end of the OFF time, the T1 ON time begins and the load energizes. At the end of T1, T2 begins and the load de-energizes. This cycle repeats until input voltage is removed. Reset: Removing input voltage resets the output and the sequence to T2.
1P-SSC-AC IN-ZC 230V 23A 800VP-E-SRW IN

RGC1A23A20KKE

1P-SSC-AC IN-ZC 230V 23A 800VP-E-SRW IN
DC Input Solid State Relay, 1 Form A SPST-NO, 4 – 32 VDC Input, 24 – 280 Vrms Output, AC Output, Panel Mount, Black, Potter & Brumfield SSR. An SSR, or Solid-State Relay is an electronic switching device that functions similarly to an electromechanical relay but with no moving contacts. It works by employing semiconductor switching elements like triacs, thyristors, and diodes. Solid State Relays are designed for applications that require high switching speed and feature low switching acoustical noise and extremely long life. These relays are used when direct control by electronic circuits is necessary and switching without arcing or contact chatter is required. SSRs are not a replacement but complement electromechanical power relays

1393030-6

DC Input Solid State Relay, 1 Form A SPST-NO, 4 – 32 VDC Input, 24 – 280 Vrms Output, AC Output, Panel Mount, Black, Potter & Brumfield SSR. An SSR, or Solid-State Relay is an electronic switching device that functions similarly to an electromechanical relay but with no moving contacts. It works by employing semiconductor switching elements like triacs, thyristors, and diodes. Solid State Relays are designed for applications that require high switching speed and feature low switching acoustical noise and extremely long life. These relays are used when direct control by electronic circuits is necessary and switching without arcing or contact chatter is required. SSRs are not a replacement but complement electromechanical power relays
SMART RELAY SRW01-UCE1TE1E26

SRW01-UCE1TE1E26

SMART RELAY SRW01-UCE1TE1E26
Solid State Relay, 10-200 VDC, 1A

1947685A32

Solid State Relay, 10-200 VDC, 1A

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.