Eaton ALS-400B Fuse - DC 36 V, Type B, 400 A Protection
Part Number: ALS-400B
Quick Summary
The ALS-400B fuse provides DC protection for forklift trucks and battery chargers. A common challenge in high-current 36 Vdc systems is reliable protection without unnecessary downtime, which this fuse helps address. While the catalog notes non-indicating status and bulk packaging, engineers should verify region-specific certifications such as CE, UL, or IP ratings via Eaton's datasheet to ensure compliance. This Bussmann series device supports fast-acting Type B protection for demanding industrial DC circuits, with a 400 A rating and 36 Vdc. Designed for easy stocking and quick swaps, it integrates smoothly into standard DC protection strategies for fleets and charging infrastructure, delivering dependable performance with familiar form factors and replacement parts.
Product Information
Extended Description
ALS-400B Eaton: Eaton Bussmann series ALS fuse, Non time-delay, Type B, DC circuits protection for fork lift truck and battery chargers, 400 A, Non-indicating, Standard, 36 Vdc
Product Name
Eaton Bussmann series ALS fuse
Catalog Number
ALS-400B
UPC
051712395601
Product Length/Depth
3.75 in
Product Height
1.63 in
Product Width
1.63 in
Product Weight
0.15 lb
Warranty
Not Applicable
Compliances
Not Applicable
Catalog Notes
Bulk
Amperage Rating
400 A
Voltage rating
36 Vdc
Packaging type
Standard
Fuse indicator
Non-indicating
Special features
Silver-plated fuse caps
ALS-400B~ONE TIME FUSE-125V-TYPE A
ALS-400B~ONE TIME FUSE-125V-TYPE A
Bussmann series Fuseology
Eaton Specification Sheet - ALS-400B
Feature: High-current protection at 400 A. Business Impact: Protects critical forklift drive trains and high-capacity chargers from short circuits and overload conditions, reducing costly downtime. Application: Ideal for heavy-duty DC circuits in material handling fleets and battery charging stations. Feature: Non time-delay, Type B construction. Business Impact: Fast interruption for high-risk faults, minimizing damage to downstream components and extending system life. Application: DC motor feeds and charger circuits where immediate fault clearance matters. Feature: 36 Vdc voltage rating. Business Impact: Ensures compatibility with standard forklift and industrial charging voltages, enabling reliable protection without voltage mismatches. Application: Forklift battery systems and DC charging bays. Feature: Non-indicating fuse with standard packaging. Business Impact: Simplifies procurement and reduces maintenance overhead when status indication is managed externally, improving spare-part planning. Application: Stocked in bulk for fleets and service centers. Feature: Silver-plated fuse caps. Business Impact: Improves contact reliability, corrosion resistance, and long-term performance in harsh industrial environments. Application: Marine-grade or dusty factory floors where connections see exposure. Feature: Compact dimensions and lightweight form factor (3.75 in x 1.63 in x 1.63 in, 0.15 lb). Business Impact: Easier installation in crowded electrical panels and enclosures, lowering install time and panel alterations. Application: Retrofit projects and new controller housings. Feature: Bulk catalog packaging. Business Impact: Enables efficient stocking for distributors and OEMs, reducing lead times and easing parts management. Application: Channel and project-based procurement for large fleets. Feature: Availability of official Eaton datasheets. Business Impact: Simplifies specification validation, compliance checks, and QA reviews during design and procurement. Application: Engineering approvals and commissioning documentation.
Get a Quick Quote for a Eaton ALS-400B
Chat with us on WhatsApp - fast responses guaranteed
Need to speak with someone? We'll call you back within 2 hours during business hours
Interested in Eaton ALS-400B?
Enquire Now
FAQs
Install the ALS-400B in-line with the 36 Vdc power feed to the forklift drive or charging circuit, ensuring proper electrical clearance and secure, vibration-resistant mounting. Use external indicators if you require fault status visibility, since this unit is non-indicating by design. Confirm conductor sizing and fuse holder compatibility with standard Bussmann ALS series accessories.
The ALS-400B is designed for high-current DC protection in forklift drive circuits and battery charging systems. With a 400 A rating and 36 Vdc voltage rating, it protects heavy-duty DC loads from short circuits and overloads, making it ideal for material handling fleets and industrial charging stations.
The product data notes Not Applicable for compliance and warranty. For regulatory certifications, consult Eaton’s specification sheets or the datasheet linked in the product downloads to confirm CE, UL, or IP-related certifications applicable to your region and application.
With non-indicating operation and robust construction, the ALS-400B minimizes maintenance interventions tied to status indicators. Its 400 A rating supports reliable interruption in fault conditions, potentially reducing downstream damage and maintenance costs. For lifecycle planning, rely on the Eaton datasheet and your panel’s protection strategy to balance replacement intervals with fleet usage patterns.
Silver-plated fuse caps improve contact reliability and resistance to corrosion, enhancing long-term performance in dirty or humid industrial environments. This translates to more stable electrical connections, fewer contact-related faults, and lower maintenance demands in challenging forklift and charging applications.