© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 08/07/17
Cartridge Fuse Blocks
Contact Littelfuse for an auto-insertable fuse, holder and adapter assembly.
ø 2
16
24.5
9
4.7
22.5
10.4
1
Note: 1.00 means the number one with two decimal places. 1,000 means the number one
thousand.
Compatible Fuse Sizes For 5×20mm Fuses
Materials
Holder: Black Thermoplastic, UL94 V-0
Polyamide PA 6.6
Cover: Transparent Thermoplastic,UL94 V-0,
Polycarbonate PC
Adapter: Polyester PBT, UL94 V-0
Metal Parts: Tin plated Copper alloy
Electrical Data (23ºC)
Rated Voltage: 250V
Max. Current/Power: 6.3A/2.5W 5A/1W
(with No. 648) 6.3A/1.6W (with No. 640)
Mounting Solder pins 0.5mm×1.2mm
Ø 3mm screw hole may be used optionally
Minimum Cross Section Conducting path - 0.2mm2
Unit Weight 1.6g (Holder), 1.0g (Cover),
1.0g (Adapter)
646 Series Molded Base Fuse Block For 5×20mm Fuses
RoHS
Pb
Product Characteristics
Dimensions
Pic1 Pic2
648 Cover
(Optional Cover)
646 Series Holder
640 Adapter
(Optional Adapter)
Ordering Information
Ordering PN Description
64000001003 Adapter - Black
64000001403 Adapter - Brown
64000001503 Adapter - White
64000001603 Adapter - Yellow
64000001703 Adapter - Green
64000001903 Adapter - Blue
64800001009 Clear Cover
Ordering PN Description Pic Meas. "A" for PCB-
thickness
64600001003 Fuse Block 1 5mm 3mm
64600001223 Fuse Block 1 3.2mm 1.5mm
64600001233 Fuse Block 2 3.3mm 1.5mm
Ordering PN Description Fuse PN Block PN
64611257133 Fuse & Block Assy. 02181.25MXP
6460001233
64612007113 Fuse & Block Assy. 0215002.MXP
64612007123 Fuse & Block Assy. 0219002.MXAP
64614007143 Fuse & Block Assy. 0218004.MXP
64614007183 Fuse & Block Assy. 0215004.MXP
Application testing is strongly recommended.
Recommended Hole Pattern
Disclaimer Notice - Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and
test each product selected for their own applications. Littelfuse products are not designed for, and may not be used in, all applications.
Read complete Disclaimer Notice at www.littelfuse.com/disclaimer-electronics.
Additional Information
Datasheet Samples
Resources
