Littelfuse 229P/230P Slo-Blo fuses are designed for reliable overcurrent protection in a variety of applications, particularly within the telecom and industrial sectors. Available in both cartridge and axial lead configurations, these fuses offer a balance of performance and space efficiency. They are characterized by their ability to withstand high current, short-duration pulses, complying with standards like UL 1459. The axial leaded versions are board washable, enhancing their suitability for modern circuit board designs. The indicating Slo-Blo fuse variant provides a visual indication of an open circuit, simplifying troubleshooting and maintenance.
Ampere Opening Rating Time: 100% 4 hours, Minimum 135% 1 hour, Maximum 200% 3 seconds, Minimum 20 seconds, Maximum
Agency Approvals: Listed by Underwriters Laboratories and Certified by CSA through 3.5 amperes. Recognized under the Components Program of Underwriters Laboratories from 4 through 7 amperes. 1 through 7 amperes approved by METI.
Agency File Numbers: UL E10480, CSA LR 29862
Interrupting Ratings (0.25–3.5A): 10,000 amperes at 125VAC
Interrupting Ratings (4–7A): 400 amperes at 125VAC
Interrupting Ratings (0.25–1A): 35 amperes at 250VAC
Interrupting Ratings (1.25–3.5A): 100 amperes at 250VAC
Packaging Options (230P Series): Tape and Reel per EIA-296 (add DRTIP suffix for 1500 pieces per reel)