Littelfuse Electronic Fuseholder Product Selection Guide

Product catalog summary

Fuseholder Selection Guide Overview
This document serves as a comprehensive guide for selecting Littelfuse fuseholder components suitable for electronic applications. It provides detailed information on various types of fuseholders, their specifications, and the appropriate selection criteria based on application needs.

Key Sections

1. Circuit Connection Methods
The guide outlines different circuit connection methods for fuseholders, including Thru-Hole Solder (TH), Surface Mount Solder (SM), Screw Terminal (ST), Wire Connector Terminal (CT), and Rivet/Screw Hole (RS). These methods are crucial for determining the appropriate installation technique for specific applications.

2. Fuse Holder Types
Various types of fuseholders are discussed, such as In-Line Fuse Holders, Panel Mount Fuse Enclosures, Circuit Board Mount Fuse Enclosures, Fuse Blocks, and Fuse Clips. Each type is suited for different installation environments and application requirements.

3. Fuse Series and Options
The document lists multiple fuse series, including 4.5x14.5mm (2AG), 5x20mm, 6.3x32mm (3AB/3AG), TE5®/TR5®, and Micro™/TR3®. Each series is detailed with specifications such as time lag, medium acting, fast acting, and very fast acting options, along with device range, maximum voltage rating, interrupting rating, and operating temperature range.

4. Fuseholder Re-Rating
Recommendations are provided for re-rating fuseholders to ensure safe operation. It is advised that fuseholders be operated at no more than 60% of the nominal current rating at 25°C ambient temperatures, as per Underwriters Laboratories test conditions.

5. Overcurrent and Overvoltage Protection Products
Littelfuse offers a wide range of protection products, including fuses, PTCs, protection relays, varistors, GDTs, thyristors, SIDACtor® devices, TVS diodes, SPAs, and PulseGuard® ESD suppressors. These products are designed to protect against various electrical threats such as ESD, surges, lightning, overloads, and short circuits.

6. Special Application Products
Products like PLED LED Protectors are highlighted for their role in enhancing LED string reliability by providing open LED bypass, ESD protection, and reverse connection protection.

Additional Resources
The guide encourages users to download catalogs from the Littelfuse website and offers access to a design support center for reference designs, application notes, testing, SPICE models, and more.

Catalog excerpts

Littelfuse Electronic Fuseholder Product Selection Guide-1

FUSEHOLDER SELECTION Fuseholder Selection Guide DO W Lit N te LO lfu A se D .co C m AT /c A at LO alo G gs S A guide to selecting Littelfuse Fuseholder components for electronic applications.

Open the catalog to page 1

Littelfuse Electronic Fuseholder Product Selection Guide-2

FUSEHOLDER SELECTION GUIDE www.littelfuse.com/fuseholders Fuse Holder Type In- Line Fuse Holders TH= Thru-Hole Solder SM= Surface Mount Solder ST= Screw Terminal CT= Wire Connector Terminal RS= Rivet/Screw Hole Wire Connector Terminals Panel Mount Fuse Enclosure 150274 4.5x14.5 mm (2AG) Circuit Board Mount Fuse Enclosure Fuse Blocks Fuse Clips Fuse Series Wire Fuse Type Circuit Connection Method TH 254101 TH 111501 TH 254121 SM 111505 286377 Flip Top 225 229 245001 Solder QC 245002 NEMA QC CT Other 254 Series TH 111506 04450001 / 00300210 345 Series Int. Shock-Safe (old) 3452 Series Int. Shock-Safe...

Open the catalog to page 2

Littelfuse Electronic Fuseholder Product Selection Guide-3

4.5mm x 14.5mm (2AG) Size Fuse Series and Holder Options Lead Free 250 / 125 35 - 500 • • • • • • • 250 / 125 35 - 400 • • • • • • • CQC CCC K PSE Semko Asia BSI VDE CE Europe QPL CSA UR Americas TUV Operating Temperature Range UL Very Fast Acting Fast Acting Interrupting Rating at Max Voltage Rating * (Amps) 0.1 - 10 • • Max. Voltage Rating * (Volts) RoHS Compliant 225 230 Agency Approvals * Device Range * (Operating Current Options in Amps) 0.25 - 7 Medium Acting Fuse Series Name Time Lag (Slo-Blo®) Fuse Options Holder Options Circuit Connection Method Wire Wire Connector Terminals Fuse Holder...

Open the catalog to page 3

Littelfuse Electronic Fuseholder Product Selection Guide-4

6.3mm X 32mm (3AB / 3AG) Size Fuse Series and Holder Options 314 • 35 - 300 • • • • • • • • 250 / 125 / 32 35 - 300 • • • • • • • • 250 35 - 1000 • • • • • • • • 1 - 30 250 / 65 100 - 1000 • • • • • 0.01 - 30 250 / 125 100 - 600 • • • • • • • • -55°C to +125°C CQC CCC K PSE Asia Semko BSI TUV CE Europe QPL Americas VDE Operating Temperature Range CSA Max. Voltage Rating * (Volts) UR Device Range * (Operating Current Options in Amps) UL Very Fast Acting Fast Acting • 250 / 125 / 32 0.125 - 40 • 322 326 0.01 - 35 0.01 - 30 • • Lead Free 313 Agency Approvals * Interrupting Rating at Max Voltage...

Open the catalog to page 4

Littelfuse Electronic Fuseholder Product Selection Guide-5

TE5®/TR5® Type Fuse Series and Holder Options 35 - 50 • • • • 250 35 - 50 • • • • • • • 250 50 • • 373 • -40°C to +85°C • CQC CCC K PSE Asia Semko BSI VDE CE Europe QPL CSA UR UL Americas TUV Operating Temperature Range • Lead Free 250 0.5 - 10 Very Fast Acting Interrupting Rating at Max Voltage Rating * (Amps) 0.4 - 6.3 Fast Acting Max. Voltage Rating * (Volts) RoHS Compliant 370 372 Agency Approvals * Device Range * (Operating Current Options in Amps) 0.4 - 6.3 Medium Acting Fuse Series Name Time Lag (Slo-Blo®) Fuse Options • • • • • • • • • • • • • • • • • • • 374 • 0.5 - 10 250 50 382 • 1...

Open the catalog to page 5

Littelfuse Electronic Fuseholder Product Selection Guide-6

As the world's #1 brand in circuit protection, Littelfuse offers the broadest and deepest portfolio of circuit protection products and a global network of technical support backed by more than 80 years of application design expertise. Visit our design support center to access: > Reference Designs > Application Notes > Application Testing > SPICE Models > Local Technical Support > Product Samples > Technical Articles > Certification Documents > Data Sheets WWW.LITTELFUSE.COM/DESIGNSUPPORT Littelfuse offers technologies that protect electronic and electrical circuits and their users against electrostatic...

Open the catalog to page 6