
A4J400 Comparison
| photo | price | summary | rating |
|---|---|---|---|
![]() | $37.50 | Condition is New – Open box, Ferraz Shawmut A4J400 400 Amp Fuse Class J 600V, shipping cost = $10.00 | 99.8% |
![]() | $61.98 | Condition is New – Open box, Ferraz Shawmut A4J400 Amptrap Fuse 400AMP 600VAC/300VDC *NEXT DAY SHIP* CLEAN, shipping cost = $10.43 | 100.0% |
![]() | $74.99 | Condition is New – Open box, Ferraz Shawmut A4J400 Amp-Trap Class J Blade Fuse Fast-Acting 600VAC 300VDC 400A, FREE SHIPPING | 99.8% |
![]() | $75.99 | Condition is New – Open box, A4J400 Ferraz Shawmut Fuses - Quantity of 3, shipping cost = $38.22 | 100.0% |
![]() | $93.50 | Condition is New – Open box, NEW MERSEN FERRAZ SHAWMUT A4J400 FUSE 400A, shipping cost = $23.31 | 99.6% |
![]() | $130.86 | Top Pick! Condition is New – Open box, SURPLUS NEW 2000 FERRAZ SHAWMUT A4J400 400 Amp Class J Fast-Acting Fuse, shipping cost = $ | 94.7% |
![]() | $135.00 | Condition is New – Open box, FERRAZ SHAWMUT A4J400 FUSE NSNP, FREE SHIPPING | 99.8% |
![]() | $270.00 | Condition is New – Open box, Ferraz Shawmut A4J400 Amp-trap Fuse 400A 600VAC NEW, shipping cost = $17.41 | 99.8% |
| photo | price | summary | rating |
|---|---|---|---|
![]() | $67.00 | Condition is Used, Gould Shawmut Ferraz A4J400 Mersen Fuse Cross Ref 896LK9, FREE SHIPPING | 99.9% |
![]() | $67.33 | Condition is Used, Gould Shawmut Ferraz A4J400 Mersen Fuse Cross Ref 896LK9 ., FREE SHIPPING | 99.9% |
![]() | $55.00 | Top Pick! Condition is Used, Ferraz Shawmut A4J400 Amptrap 600V Fuse, shipping cost = $18.00 | 100.0% |
![]() | $56.27 | Condition is Used, CJ400 - CA4J400 - A4J400 - Gould Ferraz Shawmut - FUSE 400A 600V, shipping cost = $19.99 | 100.0% |
![]() | $86.39 | Condition is Used, 1) Ferraz Shawmut A4J400 Amptrap Fuse 400AMP 600V , FREE SHIPPING | 99.9% |
![]() | $103.49 | Condition is Used, 1- Ferraz Shawmut A4J400 400 Amp Fuse Class J 600V, FREE SHIPPING | 99.9% |
| photo | price | summary | rating |
|---|---|---|---|
![]() | $60.78 | Condition is New, Ferraz Shawmut Amp-Trap A4J400 400A 600V Class J Fuse *NEW*, shipping cost = $15.57 | 100.0% |
![]() | $112.00 | Condition is New, Ferraz Shawmut A4J400 Amp-Trap Class J Blade Fuse Fast-Acting 600VAC 300VDC 400A, FREE SHIPPING | 99.2% |
![]() | $124.19 | Condition is New, Ferraz Shawmut A4J400 Amptrap Fuse 400AMP 600VAC., FREE SHIPPING | 99.9% |
![]() | $124.94 | Condition is New, A4J400 - Ferraz Shawmut Amp-Trap Class J Fast Acting Fuse 400A 600VAC 200kA 1 Po, shipping cost = $9.81 | 99.8% |
![]() | $280.00 | Condition is New, FERRAZ SHAWMUT A4J400 AMP-TRAP 600V 400A FUSE, shipping cost = $10.50 | 100.0% |

The Ferraz Shawmut A4J400 amp-trap is a high-performance, 600V, 400A fuse designed for heavy-duty electrical applications. This fuse is manufactured by Ferraz Shawmut, a leading provider of electrical equipment and solutions.
The A4J400 amp-trap is a glass tube fuse with a current rating of 400 amperes. It is designed to protect electrical circuits from overcurrent conditions, preventing damage to equipment and ensuring electrical safety. The fuse is rated for a voltage of 600 volts, making it suitable for use in medium voltage electrical systems.
The body of the fuse is made of a durable, heat-resistant material that can withstand high temperatures. The fuse element is made of a specialized alloy that melts at a precise temperature to interrupt the current flow when a fault occurs. The fuse also features a rupture disc, which helps to contain any explosive gases that may be generated during the fusing process.
The A4J400 amp-trap is a quick-acting fuse, meaning that it can interrupt the current flow very quickly when a fault occurs. This helps to minimize the damage caused by the fault and reduce the risk of electrical fires. The fuse is also self-reclosing, meaning that it will automatically return to its normal position after the fuse element has melted and the fault has been cleared.
The Ferraz Shawmut A4J400 amp-trap is designed to meet the rigorous requirements of industrial and commercial electrical applications. It is RoHS compliant, meaning that it contains no harmful substances, and is also UL listed, ensuring that it meets the safety standards set by Underwriters Laboratories.
In summary, the Ferraz Shawmut A4J400 amp-trap is a high-performance, 600V, 400A fuse designed for heavy-duty electrical applications. It is a quick-acting, self-reclosing fuse that can protect electrical circuits from overcurrent conditions and prevent damage to equipment. The fuse is durable, heat-resistant, and meets the safety standards set by UL and RoHS.
The Ferraz Shawmut A4J400 is a 600V, 400A, fuse designed for heavy industrial applications. Here are some pros and cons that may help in your decision-making process:
Pros:1. High Rupture Capacity: The Ferraz Shawmut A4J400 fuse has a high rupture capacity, which makes it suitable for applications where high short-circuit currents are expected.
2. Quick Fusing: This fuse can clear a short-circuit quickly, reducing the risk of damage to the circuit and equipment.
3. Durable: The fuse is designed to withstand harsh industrial environments and high temperatures.
4. Easy to Install: The A4J400 fuse is relatively easy to install, as it comes in a cartridge design that can be easily replaced.
Cons:1. Cost: The Ferraz Shawmut A4J400 fuse is more expensive than some other fuse types due to its high rupture capacity and industrial application.
2. Size: Due to its high current capacity, this fuse is larger than some other fuse types, which may require additional space in the electrical panel.
Conclusion:The Ferraz Shawmut A4J400 fuse is a high-performance, industrial-grade fuse that is suitable for applications where high short-circuit currents and harsh environmental conditions are expected. While it may be more expensive and larger than some other fuse types, its quick fusing, high rupture capacity, and durability make it a worthwhile investment for many industrial applications.
Recommendation:If you are looking for a heavy-duty fuse for an industrial application, the Ferraz Shawmut A4J400 fuse is a good option to consider. However, it is important to ensure that the electrical panel and wiring can accommodate the size and cost of this fuse before making a purchase. Additionally, it is always a good idea to consult with a qualified electrician or engineer to ensure that the fuse is appropriate for the specific application.
Details:
Their unique dimensions prevent the substitution of other fuses with lower voltage ratings, interrupting or current limiting capability. Carriers: ups, FedEx, USPS depending on order size and destination. Shipping available to the lower 48 USA states only. Please retain your receipt for proof of purchase.
600vac / 300vdc. Ferraz Shawmut amp-trap 600v 400a fuse nib A4J400 104896: key features:fast acting current limiting fuse. For mermen, formerly Ferraz Shawmut A4J400 ul class j fuses, a4j series item# - fuse, 600v 400a j, z222570 1 600 amps.
Ul, csa, iec approvals. Items must be in original condition and packaging.
specifications fuseaud:
- brand: Ferraz Shawmut
- mpn: A4j400
- part type: Fuse Amp Trap
- maximum current: 1.0
- specification met: Ul, Csa, Iec
- voltage: 600.0
- mounting type: Through-hole Mount
- material: Plastic, Metal
- upc: 641752891920
- package dimensions lxwxh: 10.0x9.0x9.0 Inches
- weight: 3.0 Pounds
general fuseaud:
- category: Electronics > Vehicle Gps > Car Audio Video Installation > Fuses Holders
returns fuseaud:
- method: money back
- policy: returns accepted
- time: 30 days
- paid by: seller
seller fuseaud:
- rating: 98.2%
- city: wood side, new york
- # reviews: 55
shipping fuseaud:
- type: fixed
- class: standard
- service: ups ground
- carrier: ups
- transit: 4-10 days
payments fuseaud:
- other
- credit card: mastercard
- wallet: apple-pay
offer fuseaud:
- started: october 25, 2025
- options: ship-to-home
- sold #: 12
- availability: in stock
- prices: $37.50–$280.00
- item condition:
- New – Open box
- Used
- New
- in stock #: 5
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