487 Series - Littelfuse

420VAC/420VDC Fast-acting 5x20mm Fuse
487 Series
New Product Introduction
December 2014
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487 Series 420VAC/VDC Fast-acting 5x20mm Fuse
The 487 Series is the first fast-acting fuse from the
Littelfuse 5x20mm fuse family with both AC and DC ratings
 Ensures best coordination
 420VAC characteristics
between a PSU (power supply
make it well suited for high-
unit) and an electrical circuit
energy applications like 3-
breaker panel during short-circuit
phase power supplies,
and over-current faults.
inverters, and ballasts.
 Installs in PSU, trips faster
 420VDC characteristics
than a circuit breaker in an
enable optimal performance
electrical panel, removes the
for high-voltage DC power
problematic PSU from the branch
grid in datacenters, telecom,
circuit, and keeps the branch
and intelligent commercial
circuit live without cutoff.
building applications.
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487 Series 420VAC/VDC Fast-acting 5x20mm Fuse
Product Brief
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Rated voltage @ 420VAC, 420VDC
Current rating: 8A-16A
Footprint: 5x20mm
Operating temperature Range: -55C to 125C
Maximum interrupting rating: [email protected],
[email protected]
RoHS compliant, Pb-Free, UL recognized
Cartridge and axial-leaded versions available
Applications
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Datacenter server power supplies
Telecom power supplies
Intelligent commercial buildings
High-energy and power efficient applications
(3-phase power supplies, inverters, and ballasts)
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487 Series Features & Benefits
Features
 Lower I2t and faster
tripping
Benefits

 High current ratings up to
16A in a 5x20mm footprint
Ensures the short-circuit and overcurrent fault in the PSU is protected by
the 487 Series fuse open instead of the
circuit breaker open in the electrical
panel, which causes a power outage in
the entire branch circuit
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Saves space on the PCB in high-power
applications
 420V AC
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Suitable for high-power 3-phase
applications, inverters, and ballasts
 420V DC
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Optimal for high-voltage DC
applications in datacenter power
distribution, telecom, and intelligent
commercial building applications
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Key Advantages
• Littelfuse is the Global Leader in Circuit Protection
 Flexibility in production capability to support high volume and ramping demand
 Unmatched application expertise and support
 Testing and providing services for design and compliance support
 Global delivery network
 Broad range of circuit protection products and solutions
• 487 Series Fast Tripping Capability
---Comparison with adjacent models
Characteristics
487
Series
477
Series
216
Series
505
Series
Tripping
Faster
Slow
Fast
Fast
Size
5x20mm 5x20mm
5x20mm
6x32mm
Voltage Rating
420VAC 500VAC
420VDC 400VDC
250VAC
500VAC
500VDC
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Lower I2t, Faster Tripping!
PSU #1
PSU #2
PSU #3
Circuit Breaker
Over-current fault in PSU #1 is protected by the 487 Series fuse tripping
faster than the branch circuit breaker in the electrical panel. Therefore, the
circuit breaker is kept intact and the branch power is maintained to supply
PSU #2 and #3.
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487 Series Is Optimal for Datacenter Power
Distribution Application
13.2 KV
Utility
3Φ AC 480V
AC/DC
DC 240~380V
DC 240~380V
ATS
Generator
DC/DC
12V
PSU
Battery
UPS
PDU
fan
VR
Loads
VR
Server
Storage
Networking
Cooling
The 487 Series offers a wide
range of current ratings up
to 16A, optimal for
datacenter high-voltage DC
applications.
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Lighting
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487 Series Target Customers and Applications
Target Applications:
Target Customers:
 Telecom Power Supplies
 Datacenter Server Power
Supplies
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Littelfuse High DC Voltage Fuse Portfolio
Littelfuse Offers a Wide Selection of High DC Voltage Fuses
To Serve Your Application Needs!
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Part Number, Pricing, Samples, and Availability
 Part Numbering System
 Pricing and Samples
For pricing and sample availability, please contact Littelfuse product
management and sales representatives
 Production Availability
Production lead time: 6-8 weeks
Packaging: Bulk
Minimum Order Quantity: 1,000
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Sales Tools and Contacts
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Current datasheet is available on the Littelfuse website:
www.littelfuse.com.
─ Enter “487” in the search box.
─ Samples are available by contacting your Littelfuse sales representative.
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Application and technical support available at:
─ Phone: 1-800-999-9445
─ Fax: 1-847-391-0459
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Product Management Contacts
─ Product Manager: Roger Huang
Email: [email protected]
─ Asst. Product Manager: Winson Wang
Email: [email protected]
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Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2014
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