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© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 03/03/17
Surface Mount Fuses
Surge Resistant > 461 Series TeleLink
®
Fuse
461 Series TeleLink
®
Fuse
Description
Agency Approvals
Electrical Characteristics for Series
Features
• Surface mount surge
resistant Slo-Blo
®
fuse
• Meet UL 60950 3rd Edition
power cross requirements
standard alone
• Designed to allow
compliance with Telcordia
GR-1089-CORE and TIA-
968-A (formerly FCC Part
68) Surge Specifications
• Provide coordinated
protection with Littelfuse
SIDACtor
®
Transient
Voltage Suppressor (TVS)or
a Greentube
TM
Gas Plasma
Arrestor, without series
resistors
• Designed to serve
the requirements
of a wide range of
telecommunication and
networking equipment
• 2A rating has improved
temperature rise
performance under 2.2A
surge current testing when
compared with 1.25A
rating
• Product is Halogen Free
and RoHS compliant and
compatible with lead-
free solder and higher
temperature profiles when
ordered with Standard
Silver Plated Brass Caps
• Standard product is RoHS
Compliant and compatible
with lead-free solders and
higher temperature profiles
RoHS
AGENCY AGENCY FILE NUMBER AMPERE RANGE
E10480 .5A - 2A
29862 .5A - 2A
% of Ampere
Rating
Opening Time
100% 4 hours, Minimum
250% 1 sec., Min.; 120 secs., Max.
The Littelfuse 461 Series TeleLink
®
Surface Mount,
Surge Resistant Fuse, offers over-current protection for
a wide range of telecom applications without requiring
a series resistor. When used in conjunction with a
Littelfuse SIDACtor
®
Transient Voltage Suppressor (TVS)
or a Greentube
TM
Gas Plasma Arrestor, this combination
provides a compliant solution for standards and
recommendations such as GR-1089–Core, TIA-968-A, UL/
EN/IEC 60950, and ITU K.20 and K.21. The coordination
requirement contained in GR-1089–Core, and ITU K.20/21
may require a series of impedance devices.
Applications
• T1/E1/J1 and HDSL2/4
• SLIC interface portion of Fiber to the Curb (FTTC) and
Fiber to the Premises (FTTP)
• Non-Fiber SLIC interface for Central Office (CO) locations
and Remote Terminals (RT)
• xDSL applications such as ADSL, ADSL2+, VDSL, and
VDSL2+
• Ethernet 10/100/1000BaseT
• POTS applications such as modems, answering
machines, telephones, fax machines, and security
systems
• ISDN “U” interface
• Baystation T1/E1/J1, T3 (DS3) trunk cards
Telecom Nano
2®
Fuse Temperature Reading
04611.25 < 82°C (180°F)
0461002. < 50°C (122°F)
Maximum Temperature Rise
Higher Currents and PCB layout designs can affect this parameter.
Readings are measured at rated current after temperature stabilizes.
Specifications are subject to change without notice. Application testing is strongly recommended.
Additional Information
Datasheet
Samples
Resources