Founded in 1927 and headquartered in Chicago, Littelfuse is a global leader in circuit protection, power control, and sensing technologies. Best known for its fuses, Littelfuse makes components that keep electrical systems safe and reliable in industrial, automotive, commercial, and electronics applications. Whale Supply carries a selection of Littelfuse fuses, fuse holders, and circuit protection products trusted by electricians, maintenance teams, and OEMs.
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LittelFuse JLLN450.X UL CLASS T FAST-ACTING FUSE
Littelfuse | SKU: LF-JLLN450
Price: $219.13Space saving POWR-GARD Class T fuses are the most compact fuses available in ratings above 30 amperes — less than one-third the size of comparable Class R fuses. When rated in accordance with the...- Availability:
- In Stock - Ships within the next business day
Price: $219.13 -
Littelfuse 0JTD100.VXID UL CLASS J TIME-DELAY FUSES WITH INDICATION
Littelfuse | SKU: LF-JTD100ID
MSRP: $121.63Price: $109.22The JTD_ID Indicating* Series fuses provide visual blown indication and maximum protection in a compact size. These time-delay, dual-element fuses carry the Littelfuse POWR-PRO® advanced technology...- Availability:
- In Stock - Ships within the next business day
MSRP: $121.63Price: $109.22 -
Littelfuse FLSR225.X UL CLASS RK5 DUAL-ELEMENT TIME-DELAY FUSE
Littelfuse | SKU: LF-FLSR225
MSRP: $280.91Price: $268.19The FLSR series dual-element, time-delay UL Class RK5 fuses are the most widely used fuse class. They offer superior performance and excellent protection for all types of circuits, especially those...- Availability:
- In Stock - Ships within the next business day
MSRP: $280.91Price: $268.19 -
Littelfuse FLNR400.X UL CLASS RK5 DUAL-ELEMENT TIME-DELAY FUSE
Littelfuse | SKU: LF-FLNR400
MSRP: $152.04Price: $145.87The FLNR series sets the standard for general purpose fuses. The dual-element design provides advanced short-circuit and overload protection. These time-delay fuses are also available in an...- Availability:
- In Stock - Ships within the next business day
MSRP: $152.04Price: $145.87 -
LittelFuse 0JTD150.XXID UL CLASS J TIME-DELAY FUSES WITH INDICATION
Littelfuse | SKU: LF-JTD150ID
MSRP: $241.57Price: $216.43The JTD_ID Indicating* Series fuses provide visual blown indication and maximum protection in a compact size. These time-delay, dual-element fuses carry the Littelfuse POWR-PRO® advanced...- Availability:
- In Stock - Ships within the next business day
MSRP: $241.57Price: $216.43 -
LittelFuse FLSR200.X UL CLASS RK5 DUAL-ELEMENT TIME-DELAY FUSE
Littelfuse | SKU: LF-FLSR200
MSRP: $140.83Price: $134.13The FLSR series dual-element, time-delay UL Class RK5 fuses are the most widely used fuse class. They offer superior performance and excellent protection for all types of circuits, especially those...- Availability:
- In Stock - Ships within the next business day
MSRP: $140.83Price: $134.13 -
LittelFuse 201A-AU SINGLE FUNCTION RELAYS & MONITORS
Littelfuse | SKU: LF-201A-AU
MSRP: $163.09Price: $149.61The FLSR series dual-element, time-delay UL Class RK5 fuses are the most widely used fuse class. They offer superior performance and excellent protection for all types of circuits, especially those...- Availability:
- In Stock - Ships within the next business day
MSRP: $163.09Price: $149.61 -
Littelfuse FLSR250.X UL CLASS RK5 DUAL-ELEMENT TIME-DELAY FUSE
Littelfuse | SKU: LF-FLSR250
MSRP: $599.28Price: $268.19FLSR250 is a Class RK5 fuse with an ampere rating of 250 and knife-blade-style construction. Ampere Rating (A) 250 VAC (V) 600 VDC (V) 300 Interrupting Rating 20 kA @ 300...- Availability:
- In Stock - Ships within the next business day
MSRP: $599.28Price: $268.19 -
Littelfuse FLNR250.X UL CLASS RK5 DUAL-ELEMENT TIME-DELAY FUSE
Littelfuse | SKU: LF-FLNR250
MSRP: $329.02Price: $147.98FLNR250 is a Class RK5 fuse with an ampere rating of 250 and knife-blade-style construction. Ampere Rating (A) 250 VAC (V) 250 VDC (V) 125 Interrupting Rating 300 kA Ac; 20 kA...- Availability:
- In Stock - Ships within the next business day
MSRP: $329.02Price: $147.98 -
Littelfuse KLSR300, Ul Class Rk1 Fast-Acting Fuse, 300A, 600AC/300DC, 1 Piece
Littelfuse | SKU: LF-KLSR300
MSRP: $1,288.96Price: $870.07KLSR series RK1 fuses were the earliest type of current-limiting fuse developed. Their single-element, silver link design enables them to provide fast-acting overload and short-circuit protection...- Availability:
- In Stock - Ships within the next business day
MSRP: $1,288.96Price: $870.07 -
Littelfuse LSR-0, Load Sensor/ Self-Powered/ 15-
Littelfuse | SKU: LF-LSR-0
MSRP: $141.62Price: $106.84The LSR-0 is a self-powered load sensor intended for use as a proof relay. It is used to verify that current is flowing as intended. It has a guaranteed 15A pull-in current and 2.5A drop-out current...- Availability:
- In Stock - Ships within the next business day
MSRP: $141.62Price: $106.84 -
Littelfuse 460, 3-Phase Volt Mon/ 190-480V/ Ad
Littelfuse | SKU: LF-460
MSRP: $182.91Price: $144.56The 460 Series Slo-Blo® SMF is based on Littelfuse PICO® fuse through-hole technology, though offered in a surface mount package.- Availability:
- In Stock - Ships within the next business day
MSRP: $182.91Price: $144.56 -
Littelfuse JLLN600, Ul Class T Fast-Acting Fuse, 600A, 300AC/125DC, 1 Piece
Littelfuse | SKU: LF-JLLN600
MSRP: $317.66Price: $249.62Space saving POWR-GARD Class T fuses are the most compact fuses available in ratings above 30 amperes — less than one-third the size of comparable Class R fuses. When rated in accordance with the...- Availability:
- In Stock - Ships within the next business day
MSRP: $317.66Price: $249.62 -
Littelfuse FLSR015.T, 15A, 600/300 V, FLSR Series, Ul Class Rk5 Dual-Element Time-Delay Fuse
Littelfuse | SKU: LF-FLSR015
MSRP: $44.82Price: $19.28Littelfuse FLSR015.T, 15A, 600/300 V, FLSR Series, Ul Class Rk5 Dual-Element Time-Delay Fuse- Availability:
- In Stock - Ships within the next business day
MSRP: $44.82Price: $19.28 -
Littelfuse 0JTD450.XXID, 450A, 600VAC, JTD-ID Series, Ul Class J Time-Delay Fuses With Indication
Littelfuse | SKU: LF-JTD450ID
MSRP: $1,704.16Price: $766.16Littelfuse 0JTD450.XXID, 450A, 600VAC, JTD-ID Series, Ul Class J Time-Delay Fuses With Indication- Availability:
- In Stock - Ships within the next business day
MSRP: $1,704.16Price: $766.16 -
Littelfuse FLNR6.25T, 250/125 V, FLNR Series, Ul Class Rk5 Dual-Element Time-Delay Fuse
Littelfuse | SKU: LF-FLNR6.25
MSRP: $28.18Price: $13.32Littelfuse FLNR6.25T,, 250/125 V, FLNR Series, Ul Class Rk5 Dual-Element Time-Delay Fuse- Availability:
- In Stock - Ships within the next business day
MSRP: $28.18Price: $13.32 -
Littelfuse 0JLS015.T, 15A, 600VAC, JLS Series, Ul Class J Fast-Acting Fuse
Littelfuse | SKU: LF-JLS015
MSRP: $81.20Price: $35.39Littelfuse 0JLS015.T, 15A, 600VAC, JLS Series, Ul Class J Fast-Acting Fuse- Availability:
- In Stock - Ships within the next business day
MSRP: $81.20Price: $35.39 -
Littelfuse 0NLN003.T, 3A, 250/250 V, NLN Series, Ul Class K5 One-Time Fuse
Littelfuse | SKU: LF-NLN003
MSRP: $11.96Price: $8.20Littelfuse 0NLN003.T, 3A, 250/250 V, NLN Series, Ul Class K5 "One-Time" Fuse 250V- Availability:
- In Stock - Ships within the next business day
MSRP: $11.96Price: $8.20 -
Littelfuse LSRK200.X, 200A, 600/300 V, LLSRK (70-400A) Series, Ul Class Rk1 Dual Element Time Delay Fuse
Littelfuse | SKU: LF-LLSRK200
MSRP: $467.66Price: $197.06Littelfuse LSRK200.X, 200A, 600/300 V, LLSRK (70-400A) Series, Ul Class Rk1 Dual Element Time Delay Fuse 600V- Availability:
- In Stock - Ships within the next business day
MSRP: $467.66Price: $197.06 -
Littelfuse L70QS500.X, 500A, 700/700 V, L70S / L70QS Series, Powr-Speed Round-Body 2Nd Gen Semiconductor Fuse
Littelfuse | SKU: LF-L70QS500
MSRP: $1,003.92Price: $718.67Littelfuse L70QS500.X, 500A, 700/700 V, L70S / L70QS Series, Very Fast-Acting High-Speed Semiconductor Fuse- Availability:
- In Stock - Ships within the next business day
MSRP: $1,003.92Price: $718.67