York S1-FNQR5 Fuse
The York S1-FNQR5 Fuse is a 5A, 600V technical-grade time-delay cartridge fuse designed specifically for the high-demand environments of commercial and residential HVACR systems. As a Class CC current-limiting fuse, it is engineered to handle the temporary high-inrush currents typical of control circuit transformers and motor loads without nuisance tripping. Built with a high-strength melamine tube and nickel-plated brass end caps, this dual-element fuse offers a 200kA interrupting rating (AIC) at 600VAC, fulfilling NEC Section 110.9 requirements for large-capacity systems.
The rejection-style physical design (13/32" diameter x 1-1/2" length) ensures that only the correct Class CC branch circuit protection can be installed in the holder, preventing the accidental use of lower-rated supplementary fuses. This OEM York replacement part provides superior component protection by limiting the thermal and magnetic effects of short-circuit events, effectively safeguarding sensitive control boards and transformers in York and Johnson Controls equipment.
Key Benefits- Time-Delay Response: Allows for 12 seconds of 200% overcurrent to accommodate standard inductive inrush during motor startups.
- High Interrupting Rating: Features a 200,000A RMS symmetrical interrupting capacity for safe operation in high-fault current environments.
- Rejection Style Construction: Physical tab prevents the installation of non-rejection style or midget fuses into the dedicated Class CC block.
- Precision Current Limiting: Minimizes let-through energy to protect downstream electronic components from catastrophic failure during a surge.
- Standard HVACR Compatibility: Directly replaces Bussmann FNQ-R-5, Littelfuse KLDR005, and Mersen ATQR5 in industrial control circuits.
Is the S1-FNQR5 a direct cross for the Bussmann FNQ-R-5?
Yes, the York S1-FNQR5 is an OEM-branded version of the standard FNQ-R-5 Class CC fuse, maintaining identical electrical properties and dimensions for direct field replacement.
Can I use a fast-acting fuse instead of this time-delay model?
No. HVAC control transformers generate high initial magnetizing currents. A fast-acting fuse will likely blow immediately upon system startup, whereas this time-delay unit is designed to hold through that transient load.
Why is the rejection feature important in the holder?
The rejection tip ensures that the branch circuit is protected by a Class CC fuse capable of high-fault interruption, preventing a technician from accidentally installing a supplementary midget fuse which lacks the same current-limiting safety profile.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Original: $22.60
-65%$22.60
$7.91York S1-FNQR5 Fuse
The York S1-FNQR5 Fuse is a 5A, 600V technical-grade time-delay cartridge fuse designed specifically for the high-demand environments of commercial and residential HVACR systems. As a Class CC current-limiting fuse, it is engineered to handle the temporary high-inrush currents typical of control circuit transformers and motor loads without nuisance tripping. Built with a high-strength melamine tube and nickel-plated brass end caps, this dual-element fuse offers a 200kA interrupting rating (AIC) at 600VAC, fulfilling NEC Section 110.9 requirements for large-capacity systems.
The rejection-style physical design (13/32" diameter x 1-1/2" length) ensures that only the correct Class CC branch circuit protection can be installed in the holder, preventing the accidental use of lower-rated supplementary fuses. This OEM York replacement part provides superior component protection by limiting the thermal and magnetic effects of short-circuit events, effectively safeguarding sensitive control boards and transformers in York and Johnson Controls equipment.
Key Benefits- Time-Delay Response: Allows for 12 seconds of 200% overcurrent to accommodate standard inductive inrush during motor startups.
- High Interrupting Rating: Features a 200,000A RMS symmetrical interrupting capacity for safe operation in high-fault current environments.
- Rejection Style Construction: Physical tab prevents the installation of non-rejection style or midget fuses into the dedicated Class CC block.
- Precision Current Limiting: Minimizes let-through energy to protect downstream electronic components from catastrophic failure during a surge.
- Standard HVACR Compatibility: Directly replaces Bussmann FNQ-R-5, Littelfuse KLDR005, and Mersen ATQR5 in industrial control circuits.
Is the S1-FNQR5 a direct cross for the Bussmann FNQ-R-5?
Yes, the York S1-FNQR5 is an OEM-branded version of the standard FNQ-R-5 Class CC fuse, maintaining identical electrical properties and dimensions for direct field replacement.
Can I use a fast-acting fuse instead of this time-delay model?
No. HVAC control transformers generate high initial magnetizing currents. A fast-acting fuse will likely blow immediately upon system startup, whereas this time-delay unit is designed to hold through that transient load.
Why is the rejection feature important in the holder?
The rejection tip ensures that the branch circuit is protected by a Class CC fuse capable of high-fault interruption, preventing a technician from accidentally installing a supplementary midget fuse which lacks the same current-limiting safety profile.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
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Description
The York S1-FNQR5 Fuse is a 5A, 600V technical-grade time-delay cartridge fuse designed specifically for the high-demand environments of commercial and residential HVACR systems. As a Class CC current-limiting fuse, it is engineered to handle the temporary high-inrush currents typical of control circuit transformers and motor loads without nuisance tripping. Built with a high-strength melamine tube and nickel-plated brass end caps, this dual-element fuse offers a 200kA interrupting rating (AIC) at 600VAC, fulfilling NEC Section 110.9 requirements for large-capacity systems.
The rejection-style physical design (13/32" diameter x 1-1/2" length) ensures that only the correct Class CC branch circuit protection can be installed in the holder, preventing the accidental use of lower-rated supplementary fuses. This OEM York replacement part provides superior component protection by limiting the thermal and magnetic effects of short-circuit events, effectively safeguarding sensitive control boards and transformers in York and Johnson Controls equipment.
Key Benefits- Time-Delay Response: Allows for 12 seconds of 200% overcurrent to accommodate standard inductive inrush during motor startups.
- High Interrupting Rating: Features a 200,000A RMS symmetrical interrupting capacity for safe operation in high-fault current environments.
- Rejection Style Construction: Physical tab prevents the installation of non-rejection style or midget fuses into the dedicated Class CC block.
- Precision Current Limiting: Minimizes let-through energy to protect downstream electronic components from catastrophic failure during a surge.
- Standard HVACR Compatibility: Directly replaces Bussmann FNQ-R-5, Littelfuse KLDR005, and Mersen ATQR5 in industrial control circuits.
Is the S1-FNQR5 a direct cross for the Bussmann FNQ-R-5?
Yes, the York S1-FNQR5 is an OEM-branded version of the standard FNQ-R-5 Class CC fuse, maintaining identical electrical properties and dimensions for direct field replacement.
Can I use a fast-acting fuse instead of this time-delay model?
No. HVAC control transformers generate high initial magnetizing currents. A fast-acting fuse will likely blow immediately upon system startup, whereas this time-delay unit is designed to hold through that transient load.
Why is the rejection feature important in the holder?
The rejection tip ensures that the branch circuit is protected by a Class CC fuse capable of high-fault interruption, preventing a technician from accidentally installing a supplementary midget fuse which lacks the same current-limiting safety profile.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
