Description
• Fast-acting
• 5 x 14.48mm physical size
• Glass tube, nickel-plated brass endcap construction
• UL Listed product meets standard UL 248-14

Construction; Glass Tube

Electrical Characteristics

Rated Current	Amp Rating	Opening Time
100mA - 5A	100%	None
	135%	1 hours max.
	200%	2 seconds max.

Agency Information
• UL Listed Card: Guide JDYX, File E19180
• CSA Certification Card: Class 1422-01, 53787

Typical Applications: Electronic Circuits; Printed Circuit Boards

Features:
Small footprint saves space in equipment
Fast-acting for maximum component protection
Available in ferrule and axial leaded configurations

Ordering
Specify product code
• Insert packaging code prefix before part number. E.g. BK (or BK1)/C520-500-R

Dimensions - mm
Drawing Not to Scale


Specifications

Part Number	Voltage Rating Vac		Interrupting Rating at Rated Voltage (amps)	Typical DC Cold Resistance* (Ω)	Typical Melting I2t** AC	Typical Voltage Drop (mV)***
	250Vac	125Vac
C520-100-R	250	35	10,000	22.3	0.001	2230
C520-125-R	250	35	10,000	15.2	0.0019	1930
C520-250-R	250	35	10,000	5.6	0.012	1450
C520-375-R	250	35	10,000	2.53	0.039	968
C520-500-R	250	35	10,000	1.66	0.059	845
C520-750-R	250	35	10,000	0.91	0.264	686
C520-1.5-R	250	100	10,000	0.9	0.8	135
C520-2-R	250	100	10,000	0.064	1.9	136
C520-2.5-R	250	100	10,000	0.046	2.9	121
C520-3-R	250	100	10,000	0.038	6.1	116
C520-3.5-R	250	100	10,000	0.032	9.7	115
C520-4-R	250	200	10,000	0.022	16.6	88
C520-5-R	250	200	10,000	0.018	22.4	91

* DC Cold Resistance (Measured at <10% of rated current)
** Typical Melting I2t (A2Sec) (maximum I2t at 10 times rated current)
***Typical Voltage Drop (Voltage drop was measured at 25°C±3°C ambient temperature at rated current)

Time-Current Curve


Packaging Code

Packaging Code Prefix	Description
BK	100 fuses packed into a cardboard carton
BK1	1,000 fuses packed into a cardboard carton