TRF250-120 is out of stock and can be placed on backorder.
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Littelfuse Inc.
In Stock: 0
Unit Price: $0.98000
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Littelfuse Inc.
In Stock: 0
Unit Price: $0.79000
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Littelfuse Inc.
In Stock: 0
Unit Price: $0.99000
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Bourns Inc.
In Stock: 0
Unit Price: $0.91000
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Bourns Inc.
In Stock: 0
Unit Price: $0.59000
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Bel Fuse Inc.
In Stock: 0
Unit Price: $0.30792
Datasheet
Polymeric PTC Resettable Fuse 60V (250V Int) 120 mA Ih Through Hole Radial, Disc
Image shown is a representation only. Exact specifications should be obtained from the product data sheet.
Polymeric PTC Resettable Fuse 60V (250V Int) 120 mA Ih Through Hole Radial, Disc
Building Automation – Protect/Sense/Control
Basics of NTC and PTC Thermistors - Another Teaching Moment

TRF250-120

DigiKey Part Number
TRF250-120-ND
Manufacturer
Manufacturer Part Number
TRF250-120
Description
PTC RESET FUSE 60V 120MA RADIAL
Manufacturer Standard Lead Time
15 Weeks
Customer Reference
Detailed Description
Polymeric PTC Resettable Fuse 60V (250V Int) 120 mA Ih Through Hole Radial, Disc
Datasheet
 Datasheet
Product Attributes
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Category
Time to Trip
2.5 s
Manufacturer
Littelfuse Inc.
Resistance - Initial (Ri) (Min)
4 Ohms
Series
Resistance - Post Trip (R1) (Max)
16 Ohms
Packaging
Bag
Operating Temperature
-40°C ~ 85°C
Part Status
Active
Mounting Type
Through Hole
Type
Polymeric
Package / Case
Radial, Disc
Voltage - Max
60V (250V Int)
Size / Dimension
0.256" L x 0.181" W (6.50mm x 4.60mm)
Current - Hold (Ih) (Max)
120 mA
Height - Seated (Max)
0.433" (11.00mm)
Current - Trip (It)
240 mA
Lead Spacing
0.197" (5.00mm)
Current - Max
3 A
Approval Agency
CSA, TUV, UL
Environmental & Export Classifications
Product Questions and Answers
Additional Resources
Substitutes (6)
Part NumberManufacturerQuantity AvailableDigiKey Part NumberUnit PriceSubstitute Type
TRF250-120S-B-0.5Littelfuse Inc.0TRF250-120S-B-0.5-ND$0.98000Direct
250R120ULittelfuse Inc.0F1915-ND$0.79000Similar
250R120ZRLittelfuse Inc.018-250R120ZRCT-ND$0.99000Similar
MF-RX012/250-0Bourns Inc.0118-MF-RX012/250-0-ND$0.91000Direct
MF-RX012/250-2Bourns Inc.0118-MF-RX012/250-2TR-ND$0.59000Direct
In-Stock: 0
500 estimated in stock on 02-Apr-2027
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All prices are in USD
Bag
QuantityUnit PriceExt Price
1$0.78000$0.78
5$0.65000$3.25
10$0.59900$5.99
50$0.49700$24.85
100$0.45850$45.85
250$0.41220$103.05
500$0.38014$190.07
1,000$0.35047$350.47
5,000$0.29638$1,481.90
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