Cut Sheet

H49
H
P243/P266/P292 Fuse Blocks
Fuse Blocks for Semiconductor Fuses
Mersen P243 and P266 series fuse blocks for Form 101 fuses are glass-lled
polycarbonate or laminated phenolic insulator blocks with studs to accommodate bolt-
in fuses. The P292 series has a laminated phenolic insulator base with fuse clips. All
studs, clips and mounting hardware are tin or zinc plated.
Ratings:
Amps : 1 to 1000A
Clip Type : 1200VAC or less
Stud Type : 1000VAC or less
Approvals:
• UL Recognized Component
guide IZLT2 File E52283
• CSA Certied C22.2, class
6225, File 32169
Note: FH Blocks are 1” thick.
* Not UL or CSA Certified
Dimensions
For Use
with Amps
Catalog
No. Fig.
Dimensions - Inches
Stud
Size
Torque
(in lbs)A B C D E F
A13X, A15QS 70-450 P243D 2 4.40 1.50 2.79 2.20 2.06 1.17 1/4-20 36
A13X, A15QS 500-600 P243G 2 4.40 1.50 2.79 2.20 2.44 0.98 5/16-18 84
A25X, A25Z,
A30QS
35-60 P243G 2 4.40 1.50 2.79 2.20 2.44 0.98 5/16-18 84
A25X, A25Z,
A30QS
70-200 P243 1 4.50 1.50 2.50 2.25 2.38 1.06 1/4-20 36
A25X, A25Z,
A30QS
225-600 P243G 2 4.40 1.50 2.79 2.20 2.44 0.98 5/16-18 84
A50P 35-60 P243G 2 4.40 1.50 2.79 2.20 2.44 0.98 5/16-18 84
A50P, A50QS 70-200 P243E 2 4.40 1.50 2.79 2.20 2.88 0.76 1/4-20 36
A50P, A50QS 225-600 P266C 1 6.00 2.00 3.00 3.00 3.28 1.36 3/8-16 180
A60X, A60Z,
A70QS-4
35-200 P243C 2 4.40 1.50 2.79 2.20 3.62 0.39 1/4-20 36
A60X, A60Z,
A70QS-4
225-600 P266A 1 6.00 2.00 3.00 3.00 4.06 0.97 3/8-16 180
A70P, A70Q,
A70QS-4
35-100 P243C 2 4.40 1.50 2.79 2.20 3.62 0.39 1/4-20 36
A70QS-4K 125-200 P266A 1 6.00 2.00 3.00 3.00 4.06 0.97 3/8-16 180
A70P, A70Q 125-400 P266A 1 6.00 2.00 3.00 3.00 4.06 0.97 3/8-16 180
A70P, A70Q,
A70QS-4K
450-600 P266F 1 8.00 2.50 3.00 4.00 5.09 1.45 3/8-16 180
A100P 35-100 P266G 1 6.00 2.00 2.50 3.00 4.25 0.88 1/4-20 36
A100P 125-400 P266L 1 6.00 2.00 3.00 3.00 4.66 0.67 3/8-16 180
A120X 1-30 P292 3 - - - - - - - -
A30QS 700-800 FH25F4 1 6.00 2.00 3.00 3.00 2.66 1.67 3/8-16 144
A50QS 700-800 FH50F4 1 8.00 2.50 3.00 4.00 4.21 1.84 1/2-13 360
A50QS 900-1000 FH50F5 1 8.00 2.50 3.00 4.50 4.97 1.50 1/2-13 360
A70QS-4K 450-600 FH70F3 1 8.00 2.50 3.00 4.00 5.09 1.91 1/2-13 360
Figure 1
Figure 2 Figure 3