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HomeProductsCircuit ProtectionPTC Resettable FusesRXEF375K
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RXEF375K - Littelfuse Inc.

Manufacturer Part Number
RXEF375K
Manufacturer
Littelfuse
Allelco Part Number
32D-RXEF375K
ECAD Model
Parts Description
PTC RESET FUSE 72V 3.75A RADIAL
Package
Radial, Disc
Data sheet
PolySwitch, Radial-leaded Catalog.pdf
RXEF Series Datasheet.pdf
RXEF Series Datasheet.pdf
RXEF375K Spec.pdf
RoHs Status
ROHS3 Compliant
Our certification
In stock: 108170

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Specifications

RXEF375K Tech Specifications
Littelfuse Inc. - RXEF375K technical specifications, attributes, parameters and parts with similar specifications to Littelfuse Inc. - RXEF375K

Product Attribute Attribute Value  
Manufacturer Littelfuse  
Voltage - Max 72V  
Type Polymeric  
Time to Trip 24 s  
Thickness (Max) -  
Size / Dimension 1.035" Dia x 0.118" T (26.30mm x 3.00mm)  
Series PolySwitch®, RXEF  
Resistance - Post Trip (R1) (Max) 80 mOhms  
Resistance - Initial (Ri) (Min) 30 mOhms  
Ratings -  
Product Attribute Attribute Value  
Package / Case Radial, Disc  
Package Bag  
Operating Temperature -40°C ~ 85°C  
Mounting Type Through Hole  
Lead Spacing 0.400" (10.15mm)  
Height - Seated (Max) 1.224" (31.10mm)  
Current - Trip (It) 7.5 A  
Current - Max 40 A  
Current - Hold (Ih) (Max) 3.75 A  
Approval Agency CQC, CSA, TUV, UL  

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
Moisture Sensitivity Level (MSL) 1 (Unlimited)
REACH Status REACH Unaffected
ECCN EAR99
HTSUS 8533.40.8070

Parts Introduction

Manufacturer Part Number

RXEF375K

Manufacturer

Littelfuse

Introduction

The Littelfuse RXEF375K is a high-performance polymeric positive temperature coefficient (PPTC) resettable fuse that provides overcurrent and overtemperature circuit protection. It is designed to offer reliable and durable protection for a wide range of electronic devices and applications.

Product Features and Performance

Voltage rating up to 72V

Hold current (Ih) of 3.75A

Trip current (It) of 7.5A

Maximum current rating of 40A

Time to trip of 24 seconds

Initial resistance (Ri) of 30mΩ

Post-trip resistance (R1) of 80mΩ

Operating temperature range of -40°C to 85°C

Product Advantages

Resettable design allows for automatic circuit restoration after fault condition is cleared

Robust and reliable performance under various environmental conditions

Compact and space-saving radial disc package design

Multiple agency approvals (CQC, CSA, TUV, UL) for global applications

Key Reasons to Choose This Product

Provides effective circuit protection against overcurrent and overtemperature conditions

Helps prevent damage to sensitive electronic components and ensures reliable system operation

Convenient resettable functionality eliminates the need for manual intervention

Compact size and through-hole mounting enable easy integration into various electronic devices

Quality and Safety Features

Constructed with high-quality materials and undergoes rigorous testing to ensure long-term reliability

Meets global safety and compliance standards (CQC, CSA, TUV, UL)

Provides reliable overcurrent and overtemperature protection for enhanced circuit safety

Compatibility

Suitable for a wide range of electronic applications, including consumer electronics, industrial equipment, power supplies, and more.

Application Areas

Consumer electronics

Industrial equipment

Power supplies

Telecommunications equipment

Automotive electronics

Home appliances

Product Lifecycle

The Littelfuse RXEF375K is an active and currently available product. There are no immediate plans for discontinuation. Customers should contact our website's sales team for information on any equivalent or alternative models that may be available.

Parts with Similar Specifications

The three parts on the right have similar specifications to Littelfuse Inc. RXEF375K

Product Attribute RXEF375K RXEF185K RXEF110-2 RXEF250
Part Number RXEF375K RXEF185K RXEF110-2 RXEF250
Manufacturer Littelfuse Inc. Littelfuse Inc. Littelfuse Inc. Littelfuse Inc.
Series PolySwitch®, RXEF PolySwitch®, RXEF PolySwitch®, RXEF PolySwitch®, RXEF
Time to Trip 24 s 12.6 s 8.2 s 15.6 s
Package / Case Radial, Disc Radial, Disc Radial, Disc Radial, Disc
Size / Dimension 1.035" Dia x 0.118" T (26.30mm x 3.00mm) 0.660" Dia x 0.118" T (16.76mm x 3.00mm) 0.504' Dia x 0.118' T (12.80mm x 3.00mm) 0.819' Dia x 0.118' T (20.80mm x 3.00mm)
Ratings - - - -
Height - Seated (Max) 1.224" (31.10mm) 0.906" (23.00mm) 0.689' (17.50mm) 1.000' (25.40mm)
Thickness (Max) - - - -
Operating Temperature -40°C ~ 85°C -40°C ~ 85°C -40°C ~ 85°C -40°C ~ 85°C
Current - Max 40 A 40 A 40 A 40 A
Current - Trip (It) 7.5 A 3.7 A 2.2 A 5 A
Voltage - Max 72V 72V 72V 72V
Approval Agency CQC, CSA, TUV, UL CQC, CSA, TUV, UL CQC, CSA, TUV, UL CQC, CSA, TUV, UL
Type Polymeric Polymeric Polymeric Polymeric
Resistance - Initial (Ri) (Min) 30 mOhms 80 mOhms 150 mOhms 50 mOhms
Mounting Type Through Hole Through Hole Through Hole Through Hole
Current - Hold (Ih) (Max) 3.75 A 1.85 A 1.1 A 2.5 A
Package Bag Bag Tape & Reel (TR) Bag
Lead Spacing 0.400" (10.15mm) 0.199" (5.05mm) 0.199' (5.05mm) 0.400' (10.15mm)
Resistance - Post Trip (R1) (Max) 80 mOhms 190 mOhms 380 mOhms 130 mOhms

RXEF375K Datasheet PDF

Download RXEF375K pdf datasheets and Littelfuse Inc. documentation for RXEF375K - Littelfuse Inc..

Datasheets
PolySwitch, Radial-leaded Catalog.pdf RXEF Series Datasheet.pdf RXEF375K Spec.pdf
PCN Packaging
Mult Dev Shipping Chgs 9/Jun/2020.pdf
HTML Datasheet
RXEF Series Datasheet.pdf

Shipment

Delivery Time

In-stock items can be shipped within 24 hours. Some parts will be arranged for delivery within 1-2 days from the date all items arrive at our warehouse. And Allelco ships order once a day at about 17:00, except Sunday. Once the goods are shipped, the estimated delivery time depends on the shipping methods and Delivery destination. The table below shows are the logistic time for some common countries.

Delivery Cost

  1. Use your express account for shipment if you have one.
  2. Use our account for the shipment. Refer to the table below for the approximate charges.
(Different time frame / countries / package size has different price.)

Delivery Method

  1. Global Common Shipment by DHL / UPS / FedEx / TNT / EMS / SF we support.
  2. Others more shipping ways, please get in touch with your customer manager.

Common Countries Logistic Time Reference
Region Country Logistic Time(Day)
America United States 5
Brazil 7
Europe Germany 5
United Kingdom 4
Italy 5
Oceania Australia 6
New Zealand 5
Asia India 4
Japan 4
Middle East Israel 6
DHL & FedEx Shipment Charges Reference
Shipment charges(KG) Reference DHL(USD$)
0.00kg-1.00kg USD$30.00 - USD$60.00
1.00kg-2.00kg USD$40.00 - USD$80.00
2.00kg-3.00kg USD$50.00 - USD$100.00
Note:
The above table is for reference only. There may have some data bias for the uncontrollable factors.
Contact us if you have any questions.

Payment Support

The payment method can be chosen from the methods shown below: Wire Transfer (T/T, Bank Transfer), Western Union, Credit card, PayPal.

Your Faithful Supply Chain Partner -

Contact us if you have any questions.

  1. Phone
    +00852 9146 4856

Certifications & Memberships

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RXEF375K Image

RXEF375K

Littelfuse Inc.
32D-RXEF375K

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