ulharm-4248-9.1Fuseholders - Part 9: Class K
UL 4248-9
1.1 Scope
1.1.2 These requirements cover fuseholders intended for use with Class K Fuses as described in NMX-J-009/248/9-2000-ANCE, CSA C22.2 No. 248.9, UL 248-9, Low-Voltage Fuses - Part 9: Class K Fuses.