Littelfuse

AF0025-00

Name: Littelfuse AF0025-00 arc-flash relay provides fast, reliable arc-fault protection in compact AC/DC compartments with optical sensor detec...
Brand: Littelfuse
SKU: AF0025-00
Availability: InStock

Alternate Item Number: AF0025-00

UPC: 079458370270

Documents & Media

Brochure Technical Drawing Installation Instructions Specification Sheet User Manual

Contact for Pricing

Overview

The Littelfuse AF0025-00 arc-flash relay is a cost-effective, OEM-focused solution designed to deliver innovative arc-flash protection in a compact package. Engineered to minimize arc-fault damage in AC and DC compartments, this relay detects arc flashes using one or two optical sensors and rapidly issues a trip signal. Its compact design allows for surface or DIN-rail mounting, making it ideal for tight spaces such as combiner boxes and inverters. The AF0025-00 features a conformal coating for environmental protection, flexible sensor configuration for small to medium panels, and onboard or remote reset capability. With no settings required, installation is quick and easy without the need for a computer. The relay includes a solid-state redundant trip circuit for fail-safe operation and a fast response even during power-up. It provides one isolated Form C output contact for trip signals (configurable as fail-safe or non-fail-safe) and a second Form C contact to signal error conditions like sensor communication loss. This relay is perfect for applications requiring reliable, space-saving arc-flash protection.

Compact design with surface or DIN-rail mounting for tight spaces like combiner boxes and inverters
Optical sensor detection for fast arc-flash response in AC and DC compartments
Conformal coating for environmental protection and reliable performance
No settings required for quick, easy installation without a computer
Solid-state redundant trip circuit ensures fail-safe operation and fast response

Specifications

Mounting Type	Surface or DIN-rail
Poles	1 (Form C)
Series	AF0025

6896057-1

RTXD Extractor Tool

RK926011-BC

RTXP 18

1-1393143-3

Relay Accessories, Sockets & Clips, Printed Circuit Board, Phenolic, Printed Circuit Board, 6, Socket, Potter & Brumfield R10

1-1393143-6

Relay Accessories, Sockets & Clips, Solder, Polyester, Printed Circuit Board, 2, Socket, Potter & Brumfield R10

PS-60

Power supply for DIN-rail

SCP102D24X-C02

IP67 SCP-X Extreme Environment Series Power Supply. Double Stacked, Output Power 2 x 100W, Output Voltage 24 Vdc, Output Current 7.6 A total, 3.8 A per pair

1SNK705010R0000

Combine high performance with compact dimensions: - 1000 V AC / DC IEC 600 V UL, - Opt for the best marking visibility thanks to the up-front, flat marker zone, which lets you mark up to eight digits or increase the font size.

C2G0150MQMJ

HPS Open Style Control Transformer, 150VA 240x480V-120x240V 50/60Hz

0626030563

BK63H 1P B2A 10kA 120/240VAC UL1077

1270040900

GMD-16M DC240V 3W 1b EXP (GMD16M-30-01-UD-3W-S-E)

ACS380-040S-07A2-4

ACS380 AC Drive, 3-380-480V In, 3HP, 6A, Type OPEN, 1.5 overload, Integrated, HxWxD 6.69x2.76x7.52 in, Module

XT2NU3090BFF000XXX

C.BREAKER TMAX XT2N 125 UL/CSA FIXED THREE-POLE WITH FRONT TERMINALS AND THERMOMAGNETIC RELEASE TMA R 90 I3=450...900 A

CR104PXN1B

Pushbuttons. 104P heavy duty Oiltight Pushbutton. Nameplate. XN1B PR.No. CR100699

1338006700

MC-50a AC120V 50/60Hz SCREW 1a1b (Metasol) EXP (MC50A-30-11-K7-S-E)

C3SC10106GY

N3 SCREW COVER - 10X10X6 - GRA

NNC75X75WH2

The NNC75X75WH2 Halogen-Free Wide Slot Wiring Duct is used to route, protect, and manage wires near sensitive electronic equipment and in environments where heat resistance or public safety is a concern. UL 94 flame class of V-0 with a UL recognized continuous-use temperature up to 95 C (203 F). Halogen-Free, Polyphenylene Oxide (PPO). Mounting holes provided. 2.85" x 2.97" (72.4 mm x 75.4 mm) and 6.6' (2 m) long. Cover included. Color White. 5 pieces per package.

3194213000K04

DS9 RECEPTACLE POLY BLUE SIZE 5 IP 66/67/69 3P+G 150 A 480 VAC 60 Hz

TEYF2110MM

110A 2P 65K 240V TEYF TENANT BREAKER

ISS-105-ISO

The ISS-105 is a “smart” five-channel intrinsically safe relay and pump controller. The ISS-105 can be configured for a wide variety of applications including alternating or non-alternating duplex, duplex separate pump stop (SPS), triplex and quadplex applications. It can be set up for pump-up or pump-down applications or can be used as a five-channel relay. The ISS-105 has a long list of features that are needed for multiple pump applications. The ISS-105 can indicate low, high and out-of-sequence alarms. If an out-of-sequence alarm occurs, the skipped pump(s) will be started as intended. The Model ISS-105 can be set up to do non-alternating control, alternating control and alternating control with one non-alternating pump. The non-alternating pump is intended for use with an emergency or jockey pump. The ISS-105 can start an emergency pump once every 50 cycles to keep it working freely. Using the built-in DIP switches, individual pumps can be disabled when taken out of service for repair or maintenance.

MPU-CIM-00-00

Interface between MPU-32 or FPU-32 and 5-A-secondary, 1-A-secondary, and sensitive current transformers.

MPU-CTI-RT-00

CURRENT XFRMR I/P MOD RING-TONGUE TERM. Current Input Module Interface between MPU-32 or FPU-32 and 5-A-secondary, 1-A-secondary, and sensitive current transformers. With ring tongue terminals.

DCSA50

The DCSA Series is a loop-powered, linear output current transducer that provides an output that is directly proportional to the RMS AC current passing through the LCSC10T12 sensor. The DCSA provides either an analog current or voltage: 4 - 20 mA, 1 to 5VDC, or 2 to 10VDC. Each unit is factory calibrated for monitoring (with the LCSC10T12 connected) in one of four ranges; 0 - 5, 0 - 10, 0 - 20, or 0 - 50A. Zero and span adjustments allow field calibration if needed. The DCSA mounts on both DIN 1 and DIN 3 rails.

ALT-115-X-SW

The ALT alternating relays are used to alternate between two loads. The ALT is commonly used in duplex pumping applications to balance the runtime of both pumps. The ALT-S is used in single high-level float applications. When the float switch opens, the alternating relay changes state, forcing the other pump to run the next time the float closes. All ALT relays have a built-in debounce feature that prevents the relay from changing state if the switch or float contact bounces momentarily. The ALT-X has an internal cross-connected relay and is used in dual high-level float applications. These floats are commonly referred to as lead and lag floats. The pumps alternate as in the ALT-S version but the crossconnected relay configuration allows both pumps to run simultaneously when both the lead and lag floats are closed. These relays are also available with a built-in switch (SW option) that is used to manually force one of the pumps to run every time the float switch is closed. This is helpful when a pump has been removed for repair or for test purposes. In the case of the ALT-X-SW, the switch essentially forces one pump to be the lead pump, while still allowing the second to run when both floats are closed. Must use the OT08PC socket for UL Rating!

ISS-101

The ISS-101 switches are UL 913 listed as an associated apparatus for interfacing between hazardous and non-hazardous areas. These units must be installed in a non-hazardous area.

SE-GRM780

Connects the SE-601 relay to an ungrounded 24 Vdc bus.

PGR-3200

PGR-3200 is a ground-fault and insulation monitor with a supply voltage ac of 240.

ALT-230-S

ISS-100

The ISS-100 switches are UL 913 listed as an associated apparatus for interfacing between hazardous and non-hazardous areas. These units must be installed in a non-hazardous area.

201-200-SP

The 201-xxx-SP is an 8-pin octal-base, plug-in voltage monitor designed to protect single-phase motors regardless of size. The 201-100-SP is used on 95-120VAC, 50/60Hz motors to prevent damage caused by low voltage. The 201-200-SP is used on 190-240VAC, 50/60Hz motors. The 201-200-SP-T-9 is a pin-for-pin replacement for a Time Mark; #260 Series voltage monitor. High voltage protection is included in the 201-200-SP-T-9. The unique microcontroller-based voltage and voltage-sensing circuit constantly monitors the voltage to detect harmful power line conditions. When a harmful condition is detected, the relay’s output relay is deactivated after a specified trip delay. The output relay reactivates after power line conditions return to an acceptable level and a specified amount of time has elapsed (restart delay). The trip delay prevents nuisance tripping due to rapidly fluctuating power line conditions.

PC-100-LLC-GM

PC-100-LLC-GM is a liquid level control relay with an input voltage ac of 95–120 and an adjustable probe sensitivity from 4.7–100 kΩ.

How to Install the AF0025 Arc-Flash Relay

This guide provides step-by-step instructions for installing and configuring the AF0025 Arc-Flash Relay, ensuring proper setup for monitoring and safety.

Estimated time: 45m

Tools needed:

Screwdriver, Wire strippers, Multimeter

Supplies needed:

Mounting screws, Terminal connectors

Mount the AF0025 Relay
Secure the AF0025 relay to the DIN rail or surface using the integrated clips. Ensure it is level and firmly attached.
Install Arc-Flash Sensors
Mount the PGA-LS10-01B sensor(s) in the designated monitoring locations, ensuring they are unobstructed. Connect the sensors to the AF0025 relay.
Connect Power Supply
Connect the positive terminal to terminal 9, the negative terminal to terminal 10, and connect terminal 11 to ground.
Connect Relay Outputs
Wire the ERROR and TRIP relays according to your application needs. Refer to the AF0025 manual for details on changing the TRIP relay operating mode.
Power Up and Reset
Apply the supply voltage to the AF0025. Press the RESET button for at least 10 seconds but less than 20 seconds to auto-detect the sensor configuration.
Perform a Performance Test
Use a high-intensity light source on each connected sensor to verify that the TRIP output changes state and operates the attached device as expected.

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.