Surge-tolerant fuses qualified for telecommunication and networking applications

The 461E series from Littelfuse are surface-mount, surge-resistant fuses designed to serve the requirements of telecommunication and networking equipment.

With optimised opening times at certain overload conditions, 461E series TeleLink® fuses work in harmony with Littelfuse’s new SIDACtor® transient-voltage suppressor products. This combination provides a compliant solution for various standards and recommendations, such as GR–1089–Core, TIA–968–A, UL/EN/IEC 60950 and ITU K.20/.21. The coordination requirement contained in GR–1089–Core and ITU K.20/.21 may require a series impedance device.

Telecom power cross tests have shown that the 461E series opens fast enough to prevent overheating of the over-voltage protection device in the same circuit.

 

FEATURES Subminiature ceramic package 1.25A rating 600V maximum voltage rating 0.112Ω nominal cold resistance Compatible with lead-free solders and higher-temperature profiles 60A @ 600V AC interrupt rating Nominal melting I2t (A2sec) of 14.2

APPLICATIONS T1/E1/J1 and HDSL2/4 SLIC interface portion of Fibre To The Curb (FTTC) and Fibre To The Premises (FTTP) Non-fibre SLIC interface for Central Office (CO) locations and Remote Terminals (RTs) xDSL applications such as ADSL, ADSL2+, VDSL and VDSL2+ 10/100/1000BaseT Ethernet POTS applications such as modems, answering machines, telephones, fax machines and security systems ISDN U interface Baystation T1/E1/J1, T3 (DS3) trunk cards

 

 

Littelfuse / 461E