Name: LR4-550RAF
Brand: Littelfuse Inc.
SKU: LR4-550RAF
Availability: InStock
Rating: 5 (79 reviews)

LR4-550RAF

For Reference Only

Part Number	LR4-550RAF
Manufacturer	Littelfuse Inc.
Description	POLYSWITCH PTC RESET 5.5A STRAP
Datasheet	LR4-550RAF Datasheet LR4-550RAF Specifications
Package	Strap
ECAD
In Stock	5,382 piece(s)
Unit Price	Request a Quote
Lead Time	To be Confirmed
Estimated Delivery Time	May 22 - May 27 (Choose Expedited Shipping)
Request for Quotation

Payment Methods
Delivery Services

Part Number # LR4-550RAF (PTC Resettable Fuses) is manufactured by Littelfuse Inc. and distributed by Heisener. Being one of the leading electronics distributors, we carry many kinds of electronic components from some of the world’s top class manufacturers. Their quality is guaranteed by its stringent quality control to meet all required standards.

For LR4-550RAF specifications/configurations, quotation, lead time, payment terms of further enquiries please have no hesitation to contact us. To process your RFQ, please add LR4-550RAF with quantity into BOM. Heisener.com does NOT require any registration to request a quote of LR4-550RAF.

LR4-550RAF Specifications

Manufacturer	Littelfuse Inc.
Category	Circuit Protection - PTC Resettable Fuses
Package	Strap
ECAD
Series	PolySwitch?, LR4
Type	Polymeric
Voltage - Max	20V
Current - Max	100A
Current - Hold (Ih) (Max)	5.5A
Current - Trip (It)	10.5A
Time to Trip	5s
Resistance - Initial (Ri) (Min)	9 mOhms
Resistance - Post Trip (R1) (Max)	22 mOhms
Resistance - 25°C (Typ)	-
Operating Temperature	-40°C ~ 85°C
Ratings	-
Mounting Type	User Defined
Package / Case	Strap
Size / Dimension	-
Height - Seated (Max)	-
Thickness (Max)	-
Lead Spacing	-

LR4-550RAF Datasheet

LR4-550RAF Reviews

An***** Yu

April 4, 2023

★ ★ ★ ★ ★

Received Quickly. Excellent Communication. Capacitors Look Excellent.

Eva*****van

April 3, 2023

★ ★ ★ ★ ★

good item, quick delivery, prefer to recommended.

Oti*****tuart

March 25, 2023

★ ★ ★ ★ ★

I always enjoy shopping with Heisener, never makes a mistake, most reliable, and no long waiting for deliveries.

Maxto*****onald

March 21, 2023

★ ★ ★ ★ ★

Very good contact, well packed, hope to buy from you again.

Luka*****ersen

March 7, 2023

★ ★ ★ ★ ★

Easy transaction. Very pleased with goods in perfect condition would recommend Heisener company.

Mavis*****yanan

March 5, 2023

★ ★ ★ ★ ★

Sure appreciate your service high standard, expertise and skills. Thanks Much!!!

Ram***** Dora

March 2, 2023

★ ★ ★ ★ ★

Bought these to help prevent solar panels from feeding back. Works great and doesn't get as hot.

Hada***** Choi

March 1, 2023

★ ★ ★ ★ ★

Quality electronic components plus fast response.Thank you.

Jerr*****oudhry

February 21, 2023

★ ★ ★ ★ ★

You guys and girls I can trust and rely on. Thank You All!

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LR4-550RAF Packaging

LR4-550RAF FAQ

1. How to order LR4-550RAF on Heisener?

Currently, Heisener only provide peer-to-peer order processing. While you submit the RFQ, our professional agent will contact you with the competitive prices in the global market, and our agent will prompt you to finish the order if you accept our offers.
2. How does Heisener guarantee that LR4-550RAF is from the original manufacturer or authorized agents?

We have a professional and experienced quality control team to strictly verify and test the LR4-550RAF. All suppliers must pass our qualification reviews before they can publish their products including LR4-550RAF on Heisener; we pay more attention to the channels and quality of LR4-550RAF products than any other customer. We strictly implement supplier audits, so you can purchase with confidence.
3. Are the LR4-550RAF price and inventory displayed accurate?

The price and inventory of LR4-550RAF fluctuates frequently and cannot be updated in time, it will be updated periodically within 24 hours. And, our quotation usually expires after 5 days.
4. What forms of payment are accepted?

Wire Transfer, PayPal, Alipay, Wechat, Credit Card, Western Union, MoneyGram, and Escrow are all acceptable.

Warm Tips: Some orders in certain payment forms may require handling fee.
5. How is the shipping arranged?

Customers can choose industry-leading freight companies, including DHL, UPS, FedEx, TNT, and Registered Mail. Shipping insurance is also available.

Once your order has been processed for shipment, our salesperson will send you an email advising you of the shipping status and tracking number.

Warm Tips: It may take up to 24 hours for the carriers to display tracking information. Usually, express delivery takes 3-5 days, and registered mail takes 25-60 days.
6. What is the process for return or replacement of LR4-550RAF?

All goods will implement Pre-Shipment Inspection (PSI), selected at random from all batches of your order to do a systematic inspection before arranging the shipment. If there is something wrong with the LR4-550RAF we delivered, we will accept the replacement or return of the LR4-550RAF only when all of the below conditions are fulfilled:

(1)Such as a deficiency in quantity, delivery of wrong items, and apparent external defects (breakage and rust, etc.), and we acknowledge such problems.

(2)We are informed of the defect described above within 90 days after the delivery of LR4-550RAF.

(3)The PartNo is unused and only in the original unpacked packaging.

Two processes to return the products:

(1)Inform us within 90 days

(2)Obtain Requesting Return Authorizations
7.How to contact us to get technical supports, such as LR4-550RAF pin diagram, LR4-550RAF datasheet?

If you need any after-sales service, please do not hesitate to contact us.

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LR4-550RAF Guarantees

Service Guarantees

We guarantee 100% customer satisfaction.

Our experienced sales team and tech support team back our services to satisfy all our customers.

Quality Guarantees

We provide 90 days warranty.

If the items you received were not in perfect quality, we would be responsible for your refund or replacement, but the items must be returned in their original condition.

Global Supply Chains - Reliable and Authorized Distributor Resources

Part Number

Manufacturer

Description

Stock

RF1537-000

D# LR4-550RAF

TE Connectivity

POLYSWITCH RESETTABLE DEVICES (Alt: LR4-550RAF)

RoHS: Compliant

Part Number

Manufacturer

Description

Stock

LR4-550RAF

TE Connectivity

POLYSWITCH PTC RESET 5.5A STRAP

1000

Part Number

Manufacturer

Description

Stock

LR4-550RAF

D# LR4-550RAF-ND

Littelfuse Inc

PTC RESET FUSE 20V 5.5A STRAP

Part Number

Manufacturer

Description

Stock

LR4550RAF

TE Connectivity

OEM/CM ONLY

217

Part Number

Manufacturer

Description

Stock

LR4550RAF

TE Connectivity

OEM/CM ONLY

1016

Part Number

Manufacturer

Description

Stock

LR4-550RAF

D# 19618593

TE Connectivity

Resettable Fuses - PPTC 5.5A Strap Polyswitch PTC Reset

Quick Inquiry

LR4-550RAF

Certified Quality

Heisener's commitment to quality has shaped our processes for sourcing, testing, shipping, and every step in between. This foundation underlies each component we sell.

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