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30R400UF PTC resettable fuse with 4A hold current and 30V DC rating. Radial leaded polymeric device for overcurrent protection.
Mfr Part #:

30R400UF

Available from 2 distributors
Mfr Name: Littelfuse Inc.
Littelfuse Inc.
PTC resettable fuse with 4A hold current and 30V DC rating. Radial leaded polymeric device for overcurrent protection.
✓ Total Stock: 3,909 pcs
$ Price Range: $0.52 - $1.30

30R400UF Available from 2 distributors

✓ Authorised
✓ Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Seba Components ✓
Non-Authorised Inventory information
3,830 pcs
On Request
3830 pcs On Request 1 On Request On Request On Request On Request On Request
MW.FEP S.p.A. ✓
Non-Authorised Inventory information
79 pcs
On Request
79 pcs On Request 1 On Request On Request On Request On Request On Request
DistyParts aggregates offers from multiple distributors. Final prices, lead times and terms are subject to the distributors' discretion and may change without prior notice. DistyParts is not liable for any discrepancies.

30R400UF Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Current
Halogen Free
Height
Lead Spacing
Lead Style
Length
Mounting Type
Operating Temperature
Package / Case
Resistance
SVHC Present
Time to Trip
Type
Voltage
Width
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30R400UF Description

Short technical summary and product information.

The 30R400UF is a radial leaded polymeric PTC resettable fuse from Littelfuse, part of the 30R Series. It holds 4A at 20°C still air without tripping and trips at a minimum of 8A. With a maximum voltage rating of 30V DC and a maximum fault current of 40A, it provides reliable overcurrent protection for low voltage applications. The device has a typical power dissipation of 2.5W in tripped state and a maximum time-to-trip of 12.7 seconds at 20A. Initial resistance is as low as 10 mΩ and up to 50 mΩ post-trip. Operating temperature ranges from -40°C to 85°C. The component measures 14.00mm x 3.00mm x 22.00mm with 5.10mm lead spacing and is through-hole mounted in a radial disc package. It is RoHS compliant, lead-free, and halogen-free. Common applications include USB hubs and ports, computer peripherals, motor protection, general electronics, and automotive low voltage circuits.

30R400UF Quick Information

Product Type: PTC Resettable Fuse
Series: 30R Series
Canonical Name: 30R400UF PTC Resettable Fuse
Subcategory: Polymeric PTC Fuse

30R400UF Compliance

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

30R400UF Estimated Pricing

Qty Low High
1+ $1.30 $1.30
5+ $1.08 $1.08
10+ $1.00 $1.00
50+ $0.83 $0.83
200+ $0.70 $0.70
400+ $0.65 $0.65
600+ $0.62 $0.62
1,000+ $0.58 $0.58
5,000+ $0.52 $0.52

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

30R400UF Features

  • 4A hold current at 20°C still air.
  • Maximum voltage rating of 30V DC.
  • Fast time-to-trip of 12.7 seconds at 20A.
  • RoHS compliant, lead-free and halogen-free.
  • Radial leaded through-hole package.

30R400UF Applications

  • Used in USB hubs and port protection.
  • Suitable for motor protection circuits.
  • Ideal for general electronics overcurrent protection.
  • Used in automotive low voltage applications.

30R400UF FAQs

7 frequently asked questions generated from this part’s specifications.
What is the hold current of the 30R400UF?

4A at 20°C still air.

What is the maximum voltage rating?

30V DC.

What is the time to trip at 20A?

12.7 seconds maximum.

What is the operating temperature range?

-40°C to 85°C.

What is the package type?

Radial, Disc through-hole package with 5.10mm lead spacing.

Is the 30R400UF RoHS compliant?

Yes, it is RoHS compliant, lead-free and halogen-free.

What is the initial resistance range?

Minimum 10 mΩ, maximum 50 mΩ in unsoldered state.

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