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30R400UMR PTC resettable fuse from Littelfuse, 30R series, with 4A hold current and 8A trip current. Radial leaded package for through-hole mounting.
Mfr Part #:

30R400UMR

Available from 2 distributors
Mfr Name: Littelfuse Inc.
Littelfuse Inc.
PTC resettable fuse from Littelfuse, 30R series, with 4A hold current and 8A trip current. Radial leaded package for through-hole mounting.
Total Stock: 461 pcs
$ Price Range: $0.47 - $1.38

30R400UMR Available from 2 distributors

Authorised
Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Non-Authorised Inventory information
455 pcs
455 pcs On Request 1 On Request On Request On Request On Request On Request
Non-Authorised Inventory information
6 pcs
6 pcs On Request 1 On Request On Request On Request On Request On Request

30R400UMR Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Current
Current - Max
Halogen Free
Height
Hold Current
Lead Spacing
Length
Mounting Type
Operating Temperature
Package / Case
Power Dissipation (Typical)
Resistance
Resistance - Initial (Min)
Resistance - Post Trip (Max)
Time to Trip
Trip Current
Type
Voltage
Voltage - Max
Width

30R400UMR Description

Short technical summary and product information.

The Littelfuse 30R400UMR is a polymeric PTC resettable fuse from the 30R series, designed for overcurrent protection in low voltage applications up to 30V. It offers a hold current of 4A and a trip current of 8A.

 

Electrical characteristics: maximum voltage 30V, maximum fault current 40A. Typical power dissipation 2.5W. Initial resistance minimum 10 mΩ, post-trip resistance maximum 50 mΩ. Time to trip at 20A is 12.7 seconds.

 

Package and mounting: radial disc package with through-hole mounting. Lead spacing 5.10mm. Dimensions: length 14.00mm, width 3.00mm, height 22.00mm. Operating temperature range -40°C to 85°C.

 

Compliance and applications: RoHS compliant, lead-free and halogen-free. Suitable for USB hubs, computer peripherals, motor protection, and general electronics.

30R400UMR Quick Information

Product Type: PTC Resettable Fuse
Series: 30R
Canonical Name: Littelfuse 30R400UMR PTC Resettable Fuse, 30V, 4A Hold, Radial Leaded
Subcategory: Radial Leaded PTC

30R400UMR Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected
Lead Free: Yes

30R400UMR Estimated Pricing

Qty Low High
1+ $1.38 $1.38
5+ $1.14 $1.14
10+ $1.05 $1.05
50+ $0.88 $0.88
100+ $0.81 $0.81
250+ $0.73 $0.73
500+ $0.67 $0.67
1,000+ $0.53 $0.53
2,000+ $0.49 $0.49
3,000+ $0.47 $0.47

Estimated market price range - modelled values for guidance only, not live distributor offers.

30R400UMR Features

  • Hold current rated at 4 amperes.
  • Trip current rated at 8 amperes.
  • Maximum voltage rating of 30 volts.
  • Radial leaded through-hole package.
  • RoHS compliant and halogen-free.

30R400UMR Applications

  • Used in USB hubs and ports.
  • Protects computer peripherals.
  • Suitable for motor protection circuits.
  • Ideal for general electronics overcurrent protection.

30R400UMR FAQs

7 frequently asked questions generated from this part’s specifications.
What is the hold current of the 30R400UMR?

4 A.

What is the trip current?

8 A.

What is the maximum voltage rating?

30 V.

What is the maximum fault current?

40 A.

What is the time to trip at 20 A?

12.7 seconds.

What is the package type?

Radial, Disc with through-hole mounting.

What is the operating temperature range?

-40°C to 85°C.

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