Littelfuse SPFI User Manual
POWR-GARD® Fuse Datasheet
SPFI SERIES IN-LINE SOLAR FUSE
1000 Vdc • 2-20 A
Patent Pending
Specifications
Voltage Rating: 1000 Vdc
Amperage Rating: 2, 3, 3.5, 4, 5, 6, 8, 10, 12, 15, 20
Max. Interrupting Rating: 20 kA
Time Constant ≤ 1ms
Material: Body: Melamine
Caps: Copper Alloy (Nickel Plated)
Approvals: UL 2579 Recognized (File: E339112)
Environmental: RoHS Compliant
Country of Origin: Mexico
Description
The Littelfuse SPFI solar fuse has been designed to
integrate into an in-line assembly within a wire harness.
The fuse provides photovoltaic (PV) protection is UL 2579
Recognized for photovoltaic applications. The SPFI can
be electrically insulated by either overmolding or using
approved heat-shrink.
Features/Benefits
• Meets UL photovoltaic specifications
• Meets IEC 60269 -6 electrical performance requirements
• 20,000 A interrupting rating
• No fuseholder required
Applications
• Photovoltaic wire harness
Dimensions mm (in)
63.50
(2.50)
ø 3.56
(0.140)
12.26
(0.483)
Typ. 2
Part Numbering System
SPFI xxx T
Series
Amp Code
Refer to Amp Code
Column in Ordering
Information Table
SERIES AMP
SPFI 2 10 SPFI002 SP FI0 02.T
SPFI 3.5 10 SPFI03.5 SPFI03.5T
SPFI 20 50 SPFI020 SPFI020.L
PACKAGE
QUANTITY
Package Quantity
T = 10
L = 50
CATALOG
NUMBER
ORDE RING
NUMBER
Web Resources
Downloadable CAD drawings and other technical information:
littelfuse.com/spfi
Recommended Crimping Tool
T&B Sta-Kon ERG4002 or equivalent
Weidmüller HTN 21 or equivalent
5.59
(0.22)
Typ. 2
9.53
(0.375)
Typ. 2
10.31
(0.406)
Typ. 2
Look for this logo to indicate products that are used in solar applications. Visit our website
Littelfuse.com/solar for the latest updates on approvals, certifications, and new products.
littelfuse.com © 2014 Littelfuse POWR-GARD® Products
1 of 3
Rev: 020414
POWR-GARD® Fuse Datasheet
SPFI SERIES IN-LINE SOLAR FUSE
Ordering Information
AMPERAGE AMP CODE CATALOG NUMBER PRODUCT MARKING PACK QUANTITY ORDERING NUMBER UPC
2 002. SPFI002 SPFI 2
3 003. SPFI003 SPFI 3
3.5 03.5 SPFI03.5 SPFI 3 ½
4 004. SPFI004 SPFI 4
5 005. SPFI005 SPFI 5
6 006. SPFI006 SPFI 6
8 008. SPFI008 SPFI 8
10 010. SPFI010 SPFI 10
12 012. S PF I012 SPF I 12
15 015. SPF I0 15 SPFI 15
20 020. SPFI020 SPFI 20
10 S PFI0 02.T 07945880898
50 SPFI002.L 07945880899
10 SPFI003.T 07945880853
50 SPFI003.L 07945880854
10 SPFI03.5T 07945879544
50 SPFI03.5L 07945879545
10 S PFI0 04.T 07945880900
50 SPFI004.L 07945880901
10 S PFI0 05.T 07945880902
50 SPFI005.L 07945880903
10 SPFI006.T 07945880855
50 SPFI006.L 07945880856
10 S PFI0 08.T 07945880857
50 SPFI008.L 07945880858
10 SPFI 010.T 07945880859
50 SPFI010.L 07945880860
10 SPFI 012.T 07945880861
50 SPFI012.L 07945880862
10 SPFI015.T 07945880863
50 SP FI015.L 07945880864
10 S P FI0 20.T 07945880865
50 SPFI020.L 07945880866
Electrical Specifications
VOLTAGE
AMPERAGE
2 1000 – 20 kA 10-12 AWG (6-4 mm2) 0.237 1.5 86 0.851 1.175 4.755 •
3 1000 – 20 kA 10-12 AWG (6-4 mm2) 0.11 1.504 0.824 5.007 7. 8 8 2 •
3.5 1000 – 20 kA 10-12 AWG (6-4 mm2) 0.07787 1.365 0.778 11.29 7 11. 2 97 •
4 1000 – 20 kA 10-12 AWG (6-4 mm2) 0.06127 1.491 0.839 23.031 23.031 •
5 1000 – 20 kA 10-12 AWG (6-4 mm2) 0.04086 1.465 0.859 42.600 42.600 •
6 1000 – 20 kA 10-12 AWG (6-4 mm2) 0.0281 1.34 8 0.769 76.270 80.254 •
8 1000 – 20 kA 10-12 AWG (6-4 mm2) 0.0178 1.610 0.914 193.32 3 198.960 •
10 1000 – 20 kA 10-12 AWG (6-4 mm2) 0.0125 1.760 1.000 395.556 40 1.20 8 •
12 1000 – 20 kA 10-12 AWG (6-4 mm2) 0.00993 1.965 1.109 599.198 641.940 •
15 1000 – 20 kA 10-12 AWG (6-4 mm2) 0.00799 2.282 1.382 457.740 504.7 70 •
20 1000 – 20 kA 10-12 AWG (6-4 mm2) 0.0045 2.810 1.574 1173. 990 1312.850 •
INTERRUPTING
RATING
DC AC DC UL RECOGNIZED
WIRE RANGE
NOM COLD
RESISTANCE
(ohm)
WATTS LOSS
AT 100% RATED
CURRENT (W)
WATTS LOSS
AT 80% RATED
CURRENT (W)
TOTAL
CLEARING I
(A2 s) 10 kA
2
t
TOTAL
CLEARING I2t
(A2 s) 20 kA
APPROVALS
Electrical Specification – Agency Requirements
AMPERAGE
RATING
100% of Amp Rating per UL 135% of A mp Rating per UL 200 % of Amp Rat ing per UL
OPENING TIME (MINUTES)
AGENCY
2-20 Temperature Stabilization 60 Max 4 Max
littelfuse.com © 2014 Littelfuse POWR-GARD® Products
2 of 3
Rev: 020414
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