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04611.25ER 04611.25ER is a Littelfuse 461 Series TeleLink surface mount fuse rated at 1.25A and 600VAC/80VDC with Slow Blow response. It is designed for telecom surge protection applications.
Mfr Part #:

04611.25ER

Available from 10 distributors
Mfr Name: Littelfuse Inc.
Littelfuse Inc.
04611.25ER is a Littelfuse 461 Series TeleLink surface mount fuse rated at 1.25A and 600VAC/80VDC with Slow Blow response. It is designed for telecom surge protection applications.
Total Stock: 15,547 pcs

04611.25ER Available from 10 distributors

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4,200 pcs
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2,759 pcs
2759 pcs On Request 1 On Request On Request 2008+ On Request On Request
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2,500 pcs
2500 pcs On Request 1 On Request On Request On Request On Request On Request
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1,860 pcs
1860 pcs On Request 1 On Request On Request On Request On Request On Request
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1,259 pcs
1259 pcs On Request 1 On Request On Request On Request On Request On Request
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897 pcs
897 pcs On Request 1 On Request On Request N/A On Request On Request
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845 pcs
845 pcs On Request 1 On Request On Request 2026-02-25 06:16:38 On Request On Request
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595 pcs
595 pcs On Request 1 On Request On Request On Request On Request On Request
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582 pcs
582 pcs On Request 1 On Request On Request On Request On Request On Request
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50 pcs
50 pcs On Request 1 On Request On Request On Request On Request On Request

04611.25ER Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Applications
Approval Agency
Breaking Capacity
Breaking Capacity @ Rated Voltage
Current Rating
Current Rating (Amps)
Failure Rate
Fuse Type
Halogen Free
Height
Length
Mounting Type
Opening Time at 100% Rated Current
Opening Time at 250% Rated Current
Operating Temperature
Package / Case
Response Time
Temperature Rise
Voltage Rating
Voltage Rating AC
Voltage Rating DC
Width

04611.25ER Description

Short technical summary and product information.

The 04611.25ER is a 1.25A board mount fuse from Littelfuse's 461 Series TeleLink family. It features a Slow Blow (Slo-Blo®) response time and is rated for 600VAC and 80VDC. The fuse offers a breaking capacity of 60A AC and 100A DC, making it suitable for telecom power cross conditions.

 

This surface mount component comes in a 2-SMD, Square End Block package measuring 10.10mm x 3.12mm x 3.12mm. It operates over a wide temperature range of -55°C to +125°C and exhibits a temperature rise of less than 82°C at rated current.

 

The fuse is designed to coordinate with Littelfuse SIDACtor® TVS or Greentube™ gas plasma arrestors without series resistors, enabling compliance with Telcordia GR-1089-CORE and TIA-968-A surge requirements. Typical applications include T1/E1/J1 and HDSL2/4 interfaces, as well as SLIC circuits.

 

It is RoHS3 compliant and halogen free, with agency approvals from CSA and UR. The 461 Series is recognized to UL/CSA/NMX 248-1 and 248-14, and conforms to IEC/EN 60127-1 and 60127-7.

04611.25ER Quick Information

Product Type: Board Mount Fuse
Series: 461 Series
Canonical Name: Littelfuse 461 Series TeleLink Surface Mount Fuse, 1.25A, 600VAC/80VDC, Slow Blow
Subcategory: Electrical, Specialty Fuses

04611.25ER Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)
REACH Status: REACH Unaffected
Lead Free: Yes

04611.25ER Features

  • Rated for 1.25A continuous current.
  • Operates at 600VAC and 80VDC.
  • Slow blow response time for surge protection.
  • Surface mount 2-SMD package design.
  • Telecom application approved.

04611.25ER Applications

  • Ideal for T1/E1/J1 line protection.
  • Used in SLIC interface circuits.
  • Designed for HDSL2/4 equipment.
  • Compatible with Telcordia GR-1089 standards.

04611.25ER FAQs

7 frequently asked questions generated from this part’s specifications.
What is the current rating of the 04611.25ER?

1.25 A

What are the voltage ratings for this fuse?

600 VAC and 80 VDC

What is the breaking capacity of the 04611.25ER?

60A AC at rated voltage, 100A DC

What is the response time of this fuse?

Slow Blow (Slo-Blo)

What package type is the 04611.25ER available in?

2-SMD, Square End Block (Surface Mount)

What is the operating temperature range?

-55°C to 125°C

What agency approvals does this fuse have?

CSA and UR

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