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© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 03/03/17
Axial Lead & Cartridge Fuses
5×20mm > Time-Lag > 977 Series
977 Series, 5×20mm, Time-Lag Fuse
450Vdc/500Vac rated, 5×20mm, Time-Lag, surge withstand,
ceramic body, cartridge fuse.
• Designed to International
(IEC) Standards for use
globally
• Follow the IEC 60127-2,
Sheet 5 specification for
Time-Lag Fuses
• Available in Cartridge and
Axial lead Form
• Rohs compliant and
Pb-free
Features
Applications
RoHS
Pb
Inverter in LCD backlight unit, DC side of air-conditioners,
3-phase power supplies, Higher Energy and Power Efficient
applications.
Description
PS
E
Agency Approvals
Agency Agency File Number Ampere Range
PS
E
Cartridge:
NBK040609-JP1021A
NBK040609-JP1021C
NBK100408-JP1021A
Leaded:
NBK040609-JP1021B
NBK040609-JP1021D
NBK100408-JP1021B
2A – 5A
6.3A – 12A
16A
2A – 5A
6.3A – 12A
16A
1410854 0.5A-8A
N/A 0.5A-8A
Electrical Characteristics for Series
% of Ampere
Rating
Ampere Rating Opening Time
150%
0.5A – 8A 60 minutes, Minimum
2A – 3.15A 60 minutes, Minimum
4A – 6.3A 60 minutes, Minimum
8A – 16A 30 minutes, Minimum
210%
0.5A – 8A 30 minutes, Maximum
2A – 3.15A 30 minutes, Maximum
4A – 6.3A 30 minutes, Maximum
8A – 16A 30 minutes, Maximum
275%
0.5A – 8A 250 ms. Min.; 80 secs. Max.
2A – 3.15A 750 ms. Min.; 80 secs. Max.
4A – 6.3A 750 ms. Min.; 80 secs. Max.
8A – 16A 750 ms. Min.; 80 secs. Max.
400%
0.5A – 8A 50 ms, Min.; 5 secs. Max.
2A – 3.15A 95 ms, Min.; 5 secs. Max.
4A – 6.3A 150 ms, Min.; 5 secs. Max.
8A – 16A 150 ms, Min.; 5 secs. Max.
1000%
0.5A – 8A 5 ms, Min.; .150 ms, Max.
2A – 3.15A 10 ms, Min.; .150 ms, Max.
4A – 6.3A 10 ms, Min.; .150 ms, Max.
8A – 16A 10 ms, Min.; .150 ms, Max.
Application testing is strongly recommended.
Additional Information
Datasheet
Samples
Resources