30R400UMR is out of stock and can be placed on backorder.
Available Substitutes:

Direct


Littelfuse Inc.
In Stock: 0
Unit Price: $0.67000
Datasheet

Direct


Littelfuse Inc.
In Stock: 0
Unit Price: $0.78000
Datasheet

Direct


Littelfuse Inc.
In Stock: 0
Unit Price: $0.71000
Datasheet

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Bourns Inc.
In Stock: 0
Unit Price: $0.59000
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Direct


Eaton - Electronics Division
In Stock: 0
Unit Price: $0.86000
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Bel Fuse Inc.
In Stock: 0
Unit Price: $0.52000
Datasheet
Polymeric PTC Resettable Fuse 30V 4 A 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 30V 4 A Ih Through Hole Radial, Disc
Building Automation – Protect/Sense/Control
Basics of NTC and PTC Thermistors - Another Teaching Moment

30R400UMR

DigiKey Part Number
F1984CT-ND - Cut Tape (CT)
F1984TB-ND - Tape & Box (TB)
Manufacturer
Manufacturer Part Number
30R400UMR
Description
PTC RESET FUSE 30V 4A RADIAL
Manufacturer Standard Lead Time
15 Weeks
Customer Reference
Detailed Description
Polymeric PTC Resettable Fuse 30V 4 A Ih Through Hole Radial, Disc
Datasheet
 Datasheet
Product Attributes
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Category
Time to Trip
12.7 s
Manufacturer
Littelfuse Inc.
Resistance - Initial (Ri) (Min)
10 mOhms
Series
Resistance - Post Trip (R1) (Max)
50 mOhms
Packaging
Cut Tape (CT)
Tape & Box (TB)
Operating Temperature
-40°C ~ 85°C
Part Status
Active
Mounting Type
Through Hole
Type
Polymeric
Package / Case
Radial, Disc
Voltage - Max
30V
Size / Dimension
0.551" L x 0.118" W (14.00mm x 3.00mm)
Current - Hold (Ih) (Max)
4 A
Height - Seated (Max)
0.866" (22.00mm)
Current - Trip (It)
8 A
Lead Spacing
0.201" (5.10mm)
Current - Max
40 A
Approval Agency
cURus, TUV
Environmental & Export Classifications
Product Questions and Answers
Additional Resources
Substitutes (6)
Part NumberManufacturerQuantity AvailableDigiKey Part NumberUnit PriceSubstitute Type
RUEF400Littelfuse Inc.0RUEF400HF-ND$0.67000Direct
RUEF400-APLittelfuse Inc.0RUEF400-APHFCT-ND$0.78000Direct
RUEF400K-APLittelfuse Inc.0RUEF400K-APCT-ND$0.71000Direct
MF-R400Bourns Inc.0MF-R400-ND$0.59000Similar
PTR030V0400-TREaton - Electronics Division0283-PTR030V0400-TR-ND$0.86000Direct
In-Stock: 0
1,000 estimated in stock on 01-Apr-2027
Request Stock Notification
All prices are in USD
Cut Tape (CT)
QuantityUnit PriceExt Price
1$0.99000$0.99
5$0.95600$4.78
10$0.89400$8.94
50$0.74000$37.00
100$0.61660$61.66
250$0.60120$150.30
500$0.50870$254.35
Tape & Box (TB)
QuantityUnit PriceExt Price
1,000$0.48470$484.70
2,000$0.44657$893.14
3,000$0.42556$1,276.68
5,000$0.42350$2,117.50
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