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RKEF Series
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RKEF Series
Building Automation – Protect/Sense/Control
Basics of NTC and PTC Thermistors - Another Teaching Moment

RKEF250

DigiKey Part Number
RKEF250HF-ND
Manufacturer
Manufacturer Product Number
RKEF250
Description
PTC RESET FUSE 60V 2.5A RADIAL
Manufacturer Standard Lead Time
15 Weeks
Customer Reference
Detailed Description
Polymeric PTC Resettable Fuse 60V 2.5 A Ih Through Hole Radial, Disc
Datasheet
 Datasheet
EDA/CAD Models
RKEF250 Models
Product Attributes
Type
Description
Select All
Category
Manufacturer
Littelfuse Inc.
Series
Packaging
Bag
Part Status
Active
Type
Polymeric
Voltage - Max
60V
Current - Hold (Ih) (Max)
2.5 A
Current - Trip (It)
5 A
Current - Max
40 A
Time to Trip
15.6 s
Resistance - Initial (Ri) (Min)
40 mOhms
Resistance - Post Trip (R1) (Max)
140 mOhms
Operating Temperature
-40°C ~ 85°C
Ratings
-
Mounting Type
Through Hole
Package / Case
Radial, Disc
Size / Dimension
0.512" L x 0.150" W (13.00mm x 3.81mm)
Height - Seated (Max)
0.740" (18.80mm)
Thickness (Max)
-
Lead Spacing
0.200" (5.08mm)
Approval Agency
CSA, TUV, UL
Product Questions and Answers

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All prices are in USD
Bag
QuantityUnit PriceExt Price
1$0.71000$0.71
5$0.58800$2.94
10$0.54200$5.42
50$0.44940$22.47
100$0.41470$41.47
250$0.37280$93.20
500$0.34382$171.91
1,000$0.31700$317.00
5,000$0.26538$1,326.90
Manufacturers Standard Package