Fuse Blocks
|
30 A Fuse Blocks with
Spring-Type Fuse Clips and
Self-Lifting Wiring Terminal Clamps
|
|
100 A Fuse Blocks with
Wedge-Type Fuse Clamps and
Tang-Type Connections on the
Wiring Terminals
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Bulletin 1491 — Fuse Blocks
- Available from 30…600 A
- Can be used with Class C, CC, H, J, and R fuses
These Bulletin 1491 fuse blocks have been designed for general purpose applications. The bases of these blocks, either phenolic or porcelain, are rugged in construction and provide ease in mounting and wiring.
Standards Compliance and Certifications
- UL Recognized (File No.
E 34648) per UL 512
- CSA Certified (File No. LR1234) per
CSA C22.2 No. 14
Product Selection
Fuse Blocks
Fuse Clip
Rating [A]
|
Maximum
Voltage [V]
|
No. of Poles
|
Control Circuit Fuses
|
Power Circuit Fuses
|
| Class CC
|
Class H
|
Class J
|
Class R
|
Class C
(HRC Form II)
|
| Cat. No.
|
Cat. No.
|
Cat. No.
|
Cat. No.
|
Cat. No.
|
| 30
|
250
|
1
|
—
|
1491-N121
|
—
|
—
|
—
|
| 2
|
1491-N122
|
—
|
| 3
|
1491-N125
|
1491-N125
|
| 600
|
1
|
—
|
1491-N161
|
—
|
—
|
—
|
| 2
|
1491-R162
|
—
|
—
|
—
|
—
|
| 3
|
—
|
1491-N126
|
1491-N126
|
1491-R126
|
1491-E126
|
| 60
|
250
|
3
|
—
|
1491-N226
|
—
|
1491-R226
|
—
|
| 600
|
3
|
—
|
1491-N266
|
1491-N266
|
1491-R266
|
1491-E266
|
| 100
|
250…600
|
1
|
—
|
¬
|
1491-N321
|
¬
|
1491-N321
|
—
|
—
|
| 2
|
T
|
T
|
—
|
—
|
| 3
|
1491-N333
|
1491-N333
|
1491-R333
|
1491-E333
|
| 200
|
250…600
|
1
|
—
|
1491-N421
|
1491-N421
|
—
|
—
|
| 2
|
‡
|
‡
|
—
|
—
|
| 3
|
1491-N433
|
1491-N433
|
1491-R433
|
1491-E433
|
| 400
|
250…600
|
1
|
—
|
1491-N521
|
1491-N521
|
1491-R521
|
1491-E521
|
| 2
|
§
|
§
|
—
|
—
|
| 3
|
§
|
§
|
—
|
—
|
| 600
|
250…600
|
1
|
—
|
1491-N621
|
1491-N621
|
1491-R621
|
—
|
| 2
|
Ø
|
—
|
ª
|
| 3
|
z ª
|
z ª
|
v ª
|
|
|
| ¬ These fuse blocks have porcelain bases.
|
| T For 2-pole applications use two of Cat. No. 1491-N321.
|
| ‡ For 2-pole applications use two of Cat. No. 1491-N421.
|
| § For 2-pole applications use two of Cat. No. 1491-N521.
|
| § For 3-pole applications use three of Cat. No. 1491-N521.
|
| Ø For 2-pole applications use two of Cat. No. 1491-N621.
|
| z For 3-pole applications use three of Cat. No. 1491-N621.
|
| ª For 2-pole applications use two of Cat. No. 1491-R621.
|
| v For 3-pole applications use three of Cat. No. 1491-R621.
|
| ª Require lug kit, Cat. No. 1494R-N11, if crimped lugs are not used.
|
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)
|
| 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
|
| 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)
|
| 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
|
| 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)
|
| 600
|
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)
|
| 600
|
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
|
| 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)
|
| 600
|
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
|
| 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)
|
|
|
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 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)
|
|