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Fuse Blocks

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Approximate Dimensions

Approximate Dimensions

Dimensions are shown in inches (millimeters). Dimensions are not intended to be used for manufacturing purposes.

Fuse Size 1…30 A

Cat. No. 1491-R162

1…30 A, Single Pole, 600V Cat. No. 1491-N161 Shipping Weight — 1 lb (0.45 kg)

1…30 A, 2-Pole, 250V Cat. No. 1491-N122 Shipping Weight — 2 lb (0.91 kg)

1…30 A, 3-Pole, 250…600V Cat. No. 1491-N125 (250V) Cat. No. 1491-N126 (600V) Shipping Weight — 1 lb (0.45 kg)

Voltage [V]	Class H		Class J
	A	B	A	B
250	2-1/8 (54.0)	3 (76.2)	—	—
600	2-3/8 (60.3)	5-3/4 (146.1)	2-3/8 (60.3)	3 (76.2)

¬ Alternate mounting holes.
T Dimension “A” must be held to insure fuse block rejection function.

1…30 A, 250…600V Cat. No. 1491-R125 (250V) Cat. No. 1491-R126 (600V) Shipping Weight — 1 lb (0.45 kg)

Fuse Size [A]	Maximum Volts [V]	Cat. No.	AT ±0.020	B Ref.
1…30	250	1491-R125	2.94 (74.68)	2-1/8 (53.97)
1…30	600	1491-R126	5.72 (145.29)	2-3/8 (60.33)

Note:When fuse blocks are installed in a vertical plane, the block with the rejection numbers must be on the bottom.

Dimensions are shown in inches (millimeters). Dimensions are not intended to be used for manufacturing purposes.

Fuse Size 31…60 A

31…600 A, 3-Pole, 250…600V Cat. No. 1491-N226 (250V) Shipping Weight — 1 lb (0.45 kg)
Cat. No. 1491-N266 (600V) Shipping Weight — 2 lb (0.91 kg)

Voltage [V]	Class H		Class J
Voltage [V]	A	B	A	B
250	2-3/8 (60.3)	3-3/4 (95.3)	—	—
600	2-11/16 (68.3)	6-1/4 (158.8)	2-11/16 (68.3)	3-1/8 (79.4)

31…60 A, 250…600V Cat. No. 1491-R226 (250V) Shipping Weight — 1 lb (0.45 kg)
Cat. No. 1491-R266 (600V) Shipping Weight — 2 lb (0.91 kg)

Fuse Size [A]	Maximum Volts [V]	Cat. No.	AT ±0.020	B Ref.
31…60	250	1491-R226	3.72 (94.49)	2-3/8 (60.33)
31…60	600	1491-R266	6.22 (157.99)	2-11/16 (68.26)

Single Pole Application Use (1) of Cat. No. 1491-N321 Approximate Shipping Weight — 2 lb (0.91 kg)
3-Pole Application Use (3) of Cat. No. 1491-N321 Approximate Shipping Weight — Approx. 3 times wt. of 1-Pole

2-Pole Application Use (2) of Cat. No. 1491-N321 Approximate Shipping Weight — Approx. 2 times wt. of 1-Pole

4-Pole Application Use (4) of Cat. No. 1491-N321 Approximate Shipping Weight — Approx. 3 times wt. of 1-Pole

Voltage [V]	Class H		Class J
	A	B	A	B
250	82.6 (3-1/4)	174.6 (6-7/8)	—	—
600	85.7 (3-3/8)	225.4 (8-7/8)	82.6 (3-1/4)	142.9 (5-5/8)

¬ Alternate mounting holes.
T Dimension “A” must be held to insure fuse block rejection function.

Notes:
1. When fuse blocks are installed in a vertical plane, the block with the rejection numbers must be on the bottom.
2. When using Cat. No. 1491-N321, install fiber washers between fuse blocks and mounting plates. Discard extra screws, washers, and clamps on multiple pole applications.

Dimensions are shown in inches (millimeters). Dimensions are not intended to be used for manufacturing purposes.

Fuse Size 61…100 A

3-Pole Cat. No. 1491-N333 Approximate Shipping Weight — 3 lb (1.36 kg)

Voltage [V]	Class H		Class J
Voltage [V]	A	B	A	B
250	2-15/16 (74.6)	5-7/8 (149.2)	—	—
600	3-1/8 (79.4)	7-7/8 (200.0)	3 (76.2)	4-5/8 (117.5)

61…100 A, 250…600V Cat. No. 1491-R333 Shipping Weight — 3 lb (1.36 kg)

Fuse Size [A]	Maximum Volts [V]	Cat. No.	A¬ ±0.020	B Ref.
61…100	250	1491-R333	5.88 (149.35)	2-15/16 (74.61)
61…100	600	1491-R333	7.88 (200.15)	3-1/8 (79.38)

¬ Dimension “A” must be held to insure fuse block rejection function.

Notes
1. When fuse blocks are installed in a vertical plane, the block with the rejection numbers must be on the bottom.
2. Fuse blocks with wedge type clamps (61 A and above) can be oriented to mount all fuses either to the left or to the right of fuse clamp centers.

Dimensions are shown in inches (millimeters). Dimensions are not intended to be used for manufacturing purposes.

Fuse Size 101…200 A

101…200 A, 250…600V Cat. No. 1491-R433 Shipping Weight — 7 lb (3.2 kg)

Fuse Size [A]	Maximum Volts [V]	Cat. No.	A¬ ±0.020	B Ref.
101…200	250	1491-R433	7.25 (184.15)	4-3/16 (106.36)
101…200	600	1491-R433	9.75 (247.60)	4-5/16 (109.54)

¬ Dimension “A” must be held to insure fuse block rejection function.

Single Pole Cat. No. 1491-N521 Shipping Weight — 7 lb (3.2 kg)

2-Pole Application Use Two of Cat. No. 1491-N521 Shipping Weight — 6kg (13 lb)

3-Pole Application Use Three of Cat. No. 1491-N521 Shipping Weight — 19 lb (8.6 kg)

4-Pole Application Use Four of Cat. No. 1491-N521 Shipping Weight — 25 lb (11.4 kg)

Voltage [V]	Class H or R		Class J
Voltage [V]	A	B	A	B
250	4-3/4 (120.7)	9 (228.6)	—	—
600	4-61/64 (125.8)	12 (304.80)	4-5/8 (117.5)	7-1/2 (190.5)

Note:When fuse blocks are installed in a vertical plane, the block with the rejection numbers must be on the bottom.

Dimensions are shown in inches (millimeters). Dimensions are not intended to be used for manufacturing purposes.

Fuse Size 201…400 A

201…400 A, 250…600V Cat. No. 1491-R523 Shipping Weight — 19 lb (8.6 kg)

Fuse Size [A]	Maximum Volts [V]	Cat. No.	A¬ ±0.020	B Ref.
201…400	250	1491-R523	9 (228.60)	4-3/4 (120.70)
201…400	600	1491-R523	12 (304.80)	4-61/64 (125.81)

¬ Dimension “A” must be held to insure fuse block rejection function.

Fuse Size 401…600 A

Single Pole 600 A Terminations Only Cat. No. 1491-N621 Shipping Weight — 6 lb (2.7 kg)

Voltage [V]	Class H or R		Class J
Voltage [V]	A	B	A	B
250	8-1/8 (206.38)	4-5/8 (117.47)	—	—
600	11-1/8 (282.57)	7-5/8 (193.68)	6 (127.00)	2-1/2 (63.50)

Dimensions are shown in inches (millimeters). Dimensions are not intended to be used for manufacturing purposes.

Fuse Size 401…600 A, Continued

2-Pole 400 A Terminations Only Cat. No. 1491-N621 (Amt. 2) Shipping Weight — 11 lb (5 kg)

3-Pole 400 A Terminations Only Cat. No. 1491-N621 (Amt. 3) Shipping Weight — 16 lb (7.3 kg)

4-Pole 400 A Terminations Only Cat. No. 1491-N621 (Amt. 4) Shipping Weight — 21 lb (9.5 kg)