Name: L50S Series – High-Speed Semiconductor Fuse Series - Littelfuse L50S High-Speed Fuses Provide Superior Protection
Brand: Littelfuse Inc.

L50S Series – High-Speed Semiconductor Fuse Series - Littelfuse L50S High-Speed Fuses Provide Superior Protection

Series: L50S Series – High-Speed Semiconductor Fuse

Questions? Contact Littelfuse Support

POWR-Speed Overcurrent Protection Fundamentals

Disclaimer Notice

Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse. "Littelfuse" includes Littelfuse, Inc., and all of its affiliate entities.

The L50S series is a POWR-SPEED® high-speed fuse designed for modern-day, sensitive power electronic devices that require ultimate protection against overcurrent. POWR-SPEED® brand fuses are optimized for performance and efficiency to help extend equipment life. They offer Littelfuse-developed technology that sets tomorrow’s standards for accuracy, consistent quality, reliability, and predictable performance. Littelfuse engineers have redefined high-speed fuse technology by using advanced metallurgical, polymer, and materials research, mathematical modeling, and computerized statistical analysis.

The L50S is very fast-acting with voltage rating at 500 V ac and 450 V dc. It is specifically designed for supplementary protection of semiconducting devices such as silicon controlled rectifiers (SCRs), diodes, thyristors, triacs, transistors, and similar solid-state devices. These devices are used in power equipment including variable speed drives, power rectifiers, UPS systems, dc power supplies, and in a wide range of electronic equipment. They may be used wherever extremely fast-acting, current-limiting fuses with no time delay are required.

Features

Extremely current-limiting
Low watt losses
POWR-SPEED® technology
Low energy let-through (I2t)
Controlled transient overvoltages

Access specifications, certifications, check availability and order parts below

Catalog #	Amps (A)	Interrupting Rating	Opening	VAC (V)	VDC (V)	Stock	Samples

L50S010	10	20 kA @ 450 Vdc	Very Fast-Acting (FF)	500	450	Check	Order
L50S012	12	20 kA @ 450 Vdc	Very Fast-Acting (FF)	500	450	Check	Order
L50S015	15	20 kA @ 450 Vdc	Very Fast-Acting (FF)	500	450	Check	Order
L50S020	20	20 kA @ 450 Vdc	Very Fast-Acting (FF)	500	450	Check	Order
L50S025	25	20 kA @ 450 Vdc	Very Fast-Acting (FF)	500	450	Check	Order
L50S030	30	20 kA @ 450 Vdc	Very Fast-Acting (FF)	500	450	Check	Order
L50S035	35	20 kA @ 450 Vdc	Very Fast-Acting (FF)	500	450	Check	Order
L50S040	40	20 kA @ 450 Vdc	Very Fast-Acting (FF)	500	450	Check	Order
L50S050	50	20 kA @ 450 Vdc	Very Fast-Acting (FF)	500	450	Check	Order
L50S060	60	20 kA @ 450 Vdc	Very Fast-Acting (FF)	500	450	Check	Order
L50S070	70	20 kA @ 450 Vdc	Very Fast-Acting (FF)	500	450	Check	Order
L50S080	80	20 kA @ 450 Vdc	Very Fast-Acting (FF)	500	450	Check	Order
L50S090	90	20 kA @ 450 Vdc	Very Fast-Acting (FF)	500	450	Check	Order
L50S100	100	20 kA @ 450 Vdc	Very Fast-Acting (FF)	500	450	Check	Order
L50S125	125	20 kA @ 450 Vdc	Very Fast-Acting (FF)	500	450	Check	Order
L50S150	150	20 kA @ 450 Vdc	Very Fast-Acting (FF)	500	450	Check	Order
L50S175	175	20 kA @ 450 Vdc	Very Fast-Acting (FF)	500	450	Check	Order
L50S200	200	20 kA @ 450 Vdc	Very Fast-Acting (FF)	500	450	Check	Order
L50S225	225	20 kA @ 450 Vdc	Very Fast-Acting (FF)	500	450	Check	Order
L50S250	250	20 kA @ 450 Vdc	Very Fast-Acting (FF)	500	450	Check	Order
L50S275	275	20 kA @ 450 Vdc	Very Fast-Acting (FF)	500	450	Check	Order
L50S300	300	20 kA @ 450 Vdc	Very Fast-Acting (FF)	500	450	Check	Order
L50S350	350	200 kA @ 500 Vac	Very Fast-Acting (FF)	500	450	Check	Order
L50S400	400	20 kA @ 450 Vdc	Very Fast-Acting (FF)	500	450	Check	Order
L50S450	450	20 kA @ 450 Vdc	Very Fast-Acting (FF)	500	450	Check	Order
L50S500	500	20 kA @ 450 Vdc	Very Fast-Acting (FF)	500	450	Check	Order
L50S550	550	20 kA @ 450 Vdc	Very Fast-Acting (FF)	500	450	Check	Order
L50S600	600	20 kA @ 450 Vdc	Very Fast-Acting (FF)	500	450	Check	Order
L50S700	700	20 kA @ 450 Vdc	Very Fast-Acting (FF)	500	450	Check	Order
L50S800	800	20 kA @ 450 Vdc	Very Fast-Acting (FF)	500	450	Check	Order

Catalog #	Certificates

L50S010
L50S012
L50S015
L50S020
L50S025
L50S030
L50S035
L50S040
L50S050
L50S060
L50S070
L50S080
L50S090
L50S100
L50S125
L50S150
L50S175
L50S200
L50S225
L50S250
L50S275
L50S300
L50S350
L50S400
L50S450
L50S500
L50S550
L50S600
L50S700
L50S800

Part #	Part Description	RoHS	Pb-free	Halogen Free	IPC-Material Declaration
L50S010.T	FUS 500V SEMICONDUCTOR 10A	No 01/01/2007	No	No	Part Number - L50S010.T IPC-Material Declaration Select All X
L50S012.T	FUS 500V SEMICONDUCTOR 12A	No 01/01/2007	No	No	Part Number - L50S012.T IPC-Material Declaration Select All X
L50S015.T	FUS 500V SEMICONDUCTOR 15A	No 01/01/2007	No	No	Part Number - L50S015.T IPC-Material Declaration Select All X
L50S020.T	FUS 500V SEMICONDUCTOR 20A	No 01/01/2007	No	No	Part Number - L50S020.T IPC-Material Declaration Select All X
L50S025.T	FUS 500V SEMICONDUCTOR 25A	No 01/01/2007	No	No	Part Number - L50S025.T IPC-Material Declaration Select All X
L50S030.T	FUS 500V SEMICONDUCTOR 30A	No 01/01/2007	No	No	Part Number - L50S030.T IPC-Material Declaration Select All X
L50S035.T	FUS 500V SEMICONDUCTOR 35A	No 01/01/2007	No	No	Part Number - L50S035.T IPC-Material Declaration Select All X
L50S040.T	FUS 500V SEMICONDUCTOR 40A	No 01/01/2007	No	No	Part Number - L50S040.T IPC-Material Declaration Select All X
L50S050.T	FUS 500V SEMICONDUCTOR 50A	No 01/01/2007	No	No	Part Number - L50S050.T IPC-Material Declaration Select All X
L50S060.T	FUS 500V SEMICONDUCTOR 60A	No 01/01/2007	No	No	Part Number - L50S060.T IPC-Material Declaration Select All X
L50S070.T	FUS 500V SEMICONDUCTOR 70A	No 01/01/2007	No	No	Part Number - L50S070.T IPC-Material Declaration Select All X
L50S080.T	FUS 500V SEMICONDUCTOR 80A	No 01/01/2007	No	No	Part Number - L50S080.T IPC-Material Declaration Select All X
L50S090.T	FUS 500V SEMICONDUCTOR 90A	No 01/01/2007	No	No	Part Number - L50S090.T IPC-Material Declaration Select All X
L50S100.T	FUS 500V SEMICONDUCTOR 100A	No 01/01/2007	No	No	Part Number - L50S100.T IPC-Material Declaration Select All X
L50S125.V	FUS 500V SEMICONDUCTOR 125A	No 01/01/2007	No	No	Part Number - L50S125.V IPC-Material Declaration Select All X
L50S150.V	FUS 500V SEMICONDUCTOR 150A	No 01/01/2007	No	No	Part Number - L50S150.V IPC-Material Declaration Select All X
L50S175.V	FUS 500V SEMICONDUCTOR 175A	No 01/01/2007	No	No	Part Number - L50S175.V IPC-Material Declaration Select All X
L50S200.V	FUS 500V SEMICONDUCTOR 200A	No 01/01/2007	No	No	Part Number - L50S200.V IPC-Material Declaration Select All X
L50S225.V	FUS 500V SEMICONDUCTOR 225A	No 01/01/2007	No	No	Part Number - L50S225.V IPC-Material Declaration Select All X
L50S250.V	FUS 500V SEMICONDUCTOR 250A	No 01/01/2007	No	No	Part Number - L50S250.V IPC-Material Declaration Select All X
L50S275.V	FUS 500V SEMICONDUCTOR 275A	No 01/01/2007	No	No	Part Number - L50S275.V IPC-Material Declaration Select All X
L50S300.V	FUS 500V SEMICONDUCTOR 300A	No 01/01/2007	No	No	Part Number - L50S300.V IPC-Material Declaration Select All X
L50S350.V	FUS 500V SEMICONDUCTOR 350A	No 01/01/2007	No	No	Part Number - L50S350.V IPC-Material Declaration Select All X
L50S400.V	FUS 500V SEMICONDUCTOR 400A	No 01/01/2007	No	No	Part Number - L50S400.V IPC-Material Declaration Select All X
L50S450.X	FUS 500V SEMICONDUCTOR 450A	No 01/01/2007	No	No	Part Number - L50S450.X IPC-Material Declaration Select All X
L50S500.X	FUS 500V SEMICONDUCTOR 500A	No 01/01/2007	No	No	Part Number - L50S500.X IPC-Material Declaration Select All X
L50S550.X	FUS 500V SEMICONDUCTOR 550A	No 01/01/2007	No	No	Part Number - L50S550.X IPC-Material Declaration Select All X
L50S600.X	FUS 500V SEMICONDUCTOR 600A	No 01/01/2007	No	No	Part Number - L50S600.X IPC-Material Declaration Select All X
L50S700.X	FUS 500V SEMICONDUCTOR 700A	No 01/01/2007	No	No	Part Number - L50S700.X IPC-Material Declaration Select All X
L50S800.X	FUS 500V SEMICONDUCTOR 800A	No 01/01/2007	No	No	Part Number - L50S800.X IPC-Material Declaration Select All X

If the product environmental information that you are looking for does not appear in this tab,
please complete the Product Environmental Information Request Form.

Showing 1 items

	L50S-Datasheet
	L50S 70-100A 3D Model STP
	POWR-Speed Catalog
	POWR-Speed Catalog - Mandarin
	L50QS time current curves 35A-800A
	POWR-Speed Technical Applications Guide
	POWR-Speed Catalog - Japanese
	Fuse Fundamentals Technical Paper

Semiconductors

L50S Series – High-Speed Semiconductor Fuse Series - Littelfuse L50S High-Speed Fuses Provide Superior Protection

Application Spotlight

Part Number - L50S010.T

IPC-Material Declaration

Part Number - L50S012.T

IPC-Material Declaration

Part Number - L50S015.T

IPC-Material Declaration

Part Number - L50S020.T

IPC-Material Declaration

Part Number - L50S025.T

IPC-Material Declaration

Part Number - L50S030.T

IPC-Material Declaration

Part Number - L50S035.T

IPC-Material Declaration

Part Number - L50S040.T

IPC-Material Declaration

Part Number - L50S050.T

IPC-Material Declaration

Part Number - L50S060.T

IPC-Material Declaration

Part Number - L50S070.T

IPC-Material Declaration

Part Number - L50S080.T

IPC-Material Declaration

Part Number - L50S090.T

IPC-Material Declaration

Part Number - L50S100.T

IPC-Material Declaration

Part Number - L50S125.V

IPC-Material Declaration

Part Number - L50S150.V

IPC-Material Declaration

Part Number - L50S175.V

IPC-Material Declaration

Part Number - L50S200.V

IPC-Material Declaration

Part Number - L50S225.V

IPC-Material Declaration

Part Number - L50S250.V

IPC-Material Declaration

Part Number - L50S275.V

IPC-Material Declaration

Part Number - L50S300.V

IPC-Material Declaration

Part Number - L50S350.V

IPC-Material Declaration

Part Number - L50S400.V

IPC-Material Declaration

Part Number - L50S450.X

IPC-Material Declaration

Part Number - L50S500.X

IPC-Material Declaration

Part Number - L50S550.X

IPC-Material Declaration

Part Number - L50S600.X

IPC-Material Declaration

Part Number - L50S700.X

IPC-Material Declaration

Part Number - L50S800.X

IPC-Material Declaration

Showing 1 items

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