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Product Specifications:
| Item | Fuse |
| Ac Voltage Rating | 600V AC |
| Amps | 300A |
| Body Material | Melamine |
| Body Style | Blade |
| Class | Class J |
| Compatible Fuse Block Series | Lfj |
| Dc Voltage Rating | Not Rated |
| Diameter | 7 1/8" |
| Element | Single |
| Equivalent Brand And Series | BUSSMANN JKS, LITTELFUSE JLS, MERSEN A4J Series |
| Equivalent Series | A4J, Jks, Jls |
| Fits Fuse Block Style | Nonrejection |
| Fuse Size | 3 3/8" x 7 1/8" |
| Interrupt Rating | 200 kA at 600V AC |
| Length | 3 3/8" |
| Speed | Fast Acting |
| Standards | Ce, Csa Certified, Qpl-W-F-1814, Ul 248-8 Class J, Ul Listed |
| Visual Indication | Non Indicating |
Shipping Info:
| Ship weight (kg) | 0.76 |
| Ship height (cm) | 8.57 |
| Ship length (cm) | 18.1 |
| Ship width (cm) | 18.1 |
| Country of Origin | MX |
Product Variants
| Product | Model | Amps | Body Style | Dc Voltage Rating | Speed | Visual Indication | Interrupt Rating | Ac Voltage Rating | Class | Price | |
|---|---|---|---|---|---|---|---|---|---|---|---|
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JLS003 | 3A | Cylindrical | Not Rated | Fast Acting | Non Indicating | 200 kA at 600V AC | 600V AC | Class J | €32.18 | |
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JLS006 | 6A | Cylindrical | Not Rated | Fast Acting | Non Indicating | 200 kA at 600V AC | 600V AC | Class J | €35.25 | |
![]() |
JLS010 | 10A | Cylindrical | Not Rated | Fast Acting | Non Indicating | 200 kA at 600V AC | 600V AC | Class J | €35.15 | |
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JLS015 | 15A | Cylindrical | Not Rated | Fast Acting | Non Indicating | 200 kA at 600V AC | 600V AC | Class J | €35.18 | |
![]() |
JLS020 | 20A | Cylindrical | Not Rated | Fast Acting | Non Indicating | 200 kA at 600V AC | 600V AC | Class J | €35.27 | |
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JLS025 | 25A | Cylindrical | Not Rated | Fast Acting | Non Indicating | 200 kA at 600V AC | 600V AC | Class J | €40.03 | |
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JLS030 | 30A | Cylindrical | Not Rated | Fast Acting | Non Indicating | 200 kA at 600V AC | 600V AC | Class J | €33.87 |
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Contact us
Contact your account manager right away to get personal advice.
We're available Monday through Friday, from 07:30 until 17:00.
LITTELFUSE JLS300 Fuse, 300A, 600V AC, 3-3/8 Inch Length x 7-1/8 Inch Dia., Blade Body
€328.98 /unit







