Littelfuse 229P/230P Slo-Blo fuses are subminiature glass body fuses designed for a wide range of applications, including telecom equipment and industrial circuits. Available in cartridge form or with axial leads, these fuses offer reliable overcurrent protection and the ability to withstand high current, short-duration pulses. The axial leaded versions are board washable, and sleeved fuses are also available. They comply with industry standards such as UL 1459 and Telcordia GR-1089-CORE, making them suitable for demanding environments. Indicating Slo-Blo fuses are also available, providing a visual indication of an open circuit.
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)