Eaton ALS-550 Fuse - 550 A DC Non Current Limiting
Part Number: ALS-550
Quick Summary
Eaton ALS-550 fuse protects DC circuits in forklift and battery charger systems. In demanding industrial environments, a failed fuse can halt operation and trigger costly downtime. Note that the data lists Warranty and Compliances as Not Applicable; in practice, engineers verify CE, IP ratings, and SIL requirements where required. This fuse is built on the Bussmann series lineage, delivering compact, high-current protection with predictable operation. Silver-plated fuse caps improve contact reliability in vibration-prone equipment, while the 550 A rating supports heavy-duty forklift and charger circuits. The design aligns with standard automotive and industrial wiring practices, enabling straightforward installation and service while supporting fleet-wide reliability and uptime.
Product Information
Extended Description
ALS-550 Eaton: Eaton Bussmann series ALS fuse, Non current limiting, DC circuits protection for fork lift truck and battery chargers, 550 A
Product Name
Eaton Bussmann series ALS fuse
Catalog Number
ALS-550
UPC
051712700481
Product Length/Depth
3.75 in
Product Height
1.63 in
Product Width
1.63 in
Product Weight
0.545 lb
Warranty
Not Applicable
Compliances
Not Applicable
Amperage Rating
550 A
Special features
Silver-plated fuse caps
Bussmann series complete full line catalog no. 1007
Bussmann series complete full line catalog no. 1007
Bussmann series Fuseology
Eaton Specification Sheet - ALS-550
Feature: 550 A amperage rating with non current limiting behavior. Business Impact: provides immediate interruption on fault without constraining fault current, enabling clear fault signaling to upstream protection and predictable electrical margins. Application: protects high-current DC feeders in forklift drives and battery charging circuits. Feature: Silver-plated fuse caps. Business Impact: reduces contact resistance and improves electrical reliability in harsh, high-vibration environments. Application: enhanced performance for mobile industrial equipment and charging stations. Feature: DC protection for forklift and battery chargers. Business Impact: minimizes arc hazards and equipment damage, supporting safer operation and lower maintenance costs. Application: fleet power systems and charging infrastructure. Feature: Compact form factor (3.75 in long, 1.63 in wide, 1.63 in tall) and weight 0.545 lb. Business Impact: enables easy integration into standard fuse holders and control panels, reducing installation time and retrofit complexity. Application: retrofits and new builds in material handling and warehouse automation. Feature: Compatibility with Eaton Bussmann family. Business Impact: simplifies parts stocking, improves serviceability, and ensures consistent performance across a fleet. Application: maintenance and procurement across multiple sites. Additional Note: While the data shows Not Applicable for warranty and compliances, engineers should align with regional standards and verify any CE, SIL, or IP requirements as part of a compliant installation.
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FAQs
The ALS-550 is designed for standard fuse holders used in Eaton Bussmann series. Verify compatible holder dimensions (3.75 in length, 1.63 in width) and ensure correct polarity in DC circuits. For forklift installations, confirm space in control panels and maintain proper cable sizing to handle 550 A without excessive voltage drop.
Key specs include a 550 A amperage rating, non current limiting behavior, and a physical size of 3.75 in length by 1.63 in width and height, with a weight of 0.545 lb. The fuse caps are silver-plated to improve contact reliability, particularly in high-current, vibration-prone environments.
Yes. The ALS-550 is specifically intended for DC protection in forklift power systems and battery charging circuits. Its high current rating and compact form factor make it suitable for heavy-duty industrial fleets, provided the installation coordinates with upstream protection and the system’s fault-current requirements.
The provided data lists Warranty and Compliances as Not Applicable. In practice, verify regional requirements such as CE, IP ratings, and SIL where applicable. Always align with local electrical codes and your facility’s safety standards when integrating high-current DC fuses in fleet charging and drive systems.
The ALS-550 offers reliable, high-current DC protection with durable, silver-plated contacts that reduce resistance and arcing. This translates to lower maintenance downtime, fewer nuisance trips, and longer intervals between fuse replacements, contributing to improved fleet uptime and lower total cost of ownership in forklift and charging stations.