W-F-1814-67 Fuse, Cartridge, High Interrupting Capacity, Classes Rk1 And Rk5 Current-Limiting 600 Volts, 401-600 Amperes

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W-F-1814/670

Part or Identifying Number (PIN): The Government PIN shall consist of the prefix "WF1814/67-" followed by the PIN designation shown in table I.

TABLE I. Current rating and PIN designation.

Current in amperes	PIN designation
	RK5		RK1
	Instantaneous	Time delay	Instantaneous	Time delay
450 500 600	F5450 F5500 F5600	05450 05500 05600	F1450 F1500 F1600	01450 01500 01600

TABLE II. Peak let-thru and I2T current.

	Between threshold and 50 kA		100 kA		200 kA
	RK1	RK5	RK1	RK5	RK1	RK5
Maximum acceptable peak let-thru current (Ip x 103)	45	65	50	80	70	100
Maximum clearing I2T (amperes squared seconds) (I2T x 103)	3000	10000	3000	10000	4000	12000

Referenced documents. In addition to W-F-1814 , this document references the following: UL 4248-12

The margins of this specification sheet are marked with vertical lines to indicate where changes from the previous issue were made. This was done as a convenience only and the Government assumes no liability whatsoever for any inaccuracies in these notations. Bidders and contractors are cautioned to evaluate the requirements of this document based on the entire content irrespective of the marginal notations and relationship to the last previous issue.