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BUSSMANN Fuse: S505 Series, Time-Delay, 1 A, 250 V AC, Non-Indicating - Time-Delay Cylindrical Fuses
BUSSMANNTime-Delay Cylindrical Fuses

BUSSMANN Fuse: S505 Series, Time-Delay, 1 A, 250 V AC, Non-Indicating

The BUSSMANN S505 Series is a time-delay cylindrical fuse rated at 1 A and 250 V AC, with a 5 mm x 20 mm form factor. This non-indicating fuse is part of the S505 series and is equivalent to the 477 and GSF series…

SKU 3G-OTH-26951

Also listed as: BKS5051R · BK S505 1 R · BK-S505-1-R

Brand
BUSSMANN
Item
Fuse: S505 Series, Time-Delay, 1 A, 250 V AC, Non-Indicating
Category
Time-Delay Cylindrical Fuses
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Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

BUSSMANN
Manufacturer Part Number
BK/S505-1-R
Series
S505
Type
Time-Delay, 1 A, Non-Indicating, 5 mm x 20 mm
AC
250 V
Equivalent Fuse Series
S505, 477, & GSF

Technical Documents

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BUSSMANN Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The BUSSMANN S505 Series is a time-delay cylindrical fuse rated at 1 A and 250 V AC, with a 5 mm x 20 mm form factor. This non-indicating fuse is part of the S505 series and is equivalent to the 477 and GSF series. The manufacturer part number is BK/S505-1-R.

Frequently Asked Questions

What is the BUSSMANN S505 Series fuse used for?

The BUSSMANN S505 Series time-delay fuse protects circuits against overcurrent in industrial control panels, power supplies, and HVAC equipment. Its 1 A, 250 V AC rating and 5 mm x 20 mm size suit general-purpose protection where inrush tolerance is needed.

What are the specifications of the BUSSMANN BK/S505-1-R fuse?

The BUSSMANN BK/S505-1-R is a 1 A, 250 V AC time-delay cylindrical fuse in a 5 mm x 20 mm form factor. It is non-indicating and belongs to the S505 series, which is equivalent to the 477 and GSF series. The brand is BUSSMANN.

Where to buy the BUSSMANN S505 Series fuse worldwide?

3G Electric supplies the BUSSMANN S505 Series fuse worldwide. As a global industrial sourcing partner, we handle logistics, customs clearance, and delivery to your facility. Contact us for pricing and lead time on the BK/S505-1-R.

How to select the correct BUSSMANN S505 fuse for my application?

Select the BUSSMANN S505 fuse by matching the voltage (250 V AC), current rating (1 A), and time-delay characteristic to your circuit's inrush requirements. The 5 mm x 20 mm size fits standard fuse holders. Verify the equivalent series (S505, 477, GSF) for cross-referencing.

Used in

Common applications for BUSSMANN
Industrial motor control centers — BUSSMANN LPT series Class T time-delay fuses for branch circuit protection
Semiconductor protection in variable frequency drives — BUSSMANN FWA series fast-acting bolt-on fuses rated 150 V AC/DC
Automotive auxiliary circuit protection — BUSSMANN CB222 series Type II circuit breakers in 12 V DC systems
Control panel overcurrent protection — BUSSMANN FNA series midget time-delay indicating fuses for instrumentation
Main feeder protection in power distribution — BUSSMANN KLU series Class L time-delay bolt-on fuses up to 650 A
Fuse replacement in existing panels — BUSSMANN S-8301-1-R fuse block accepting 3AG and other glass/ceramic fuses

BUSSMANN Products

3G Electric supplies BUSSMANN time-delay cylindrical fuses. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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Compatible alternatives & equivalents

Cross-referenced by specification & description
BUSSMANN Fuse: S505 Series, Time-Delay, 10 A, 250 V AC, Non-Indicating, 5 mm x 20 mm (MPN BK/S505-10-R)
BUSSMANN
BUSSMANN Fuse: S505 Series, Time-Delay, 10 A, 250 V AC, Non-Indicating, 5 mm x 20 mm (MPN BK/S505-10-R)
BUSSMANN Fuse: S505 Series, Time-Delay, 2 A, 250 V AC, Non-Indicating, 5 mm x 20 mm (MPN BK/S505-2-R)
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BUSSMANN Fuse: S505 Series, Time-Delay, 2 A, 250 V AC, Non-Indicating, 5 mm x 20 mm (MPN BK/S505-2-R)
BUSSMANN Fuse: S505 Series, Time-Delay, 500 mA, 250 V AC, Non-Indicating, 5 mm x 20 mm (MPN BK/S505-500-R)
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BUSSMANN Fuse: S505 Series, Time-Delay, 500 mA, 250 V AC, Non-Indicating, 5 mm x 20 mm (MPN BK/S505-500-R)
BUSSMANN Fuse: S505 Series, Time-Delay, 8 A, 250 V AC, Non-Indicating, 5 mm x 20 mm (MPN S505-8-R)
BUSSMANN
BUSSMANN Fuse: S505 Series, Time-Delay, 8 A, 250 V AC, Non-Indicating, 5 mm x 20 mm (MPN S505-8-R)
BUSSMANN Fuse: S505 Series, Time-Delay, 6.3 A, 250 V AC, Non-Indicating, 5 mm x 20 mm (MPN S505-6.3-R)
BUSSMANN
BUSSMANN Fuse: S505 Series, Time-Delay, 6.3 A, 250 V AC, Non-Indicating, 5 mm x 20 mm (MPN S505-6.3-R)
BUSSMANN Fuse: S506 Series, Time-Delay, 10 A, 250 V AC, 5 mm x 20 mm (MPN BK/S506-10-R)
BUSSMANN
BUSSMANN Fuse: S506 Series, Time-Delay, 10 A, 250 V AC, 5 mm x 20 mm (MPN BK/S506-10-R)

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BUSSMANN Fuse: FNQ Series, Midget, Time-Delay, 125 mA, 500 V AC, 13/32 in x 1 1/2 in, Non-Indicating (MPN FNQ-1/8)
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BUSSMANN Fuse: FNQ Series, Midget, Time-Delay, 125 mA, 500 V AC, 13/32 in x 1 1/2 in, Non-Indicating (MPN FNQ-1/8)
BUSSMANN Fuse: GMC Series, Time-Delay, 4 A, 125 V AC, 5 mm x 20 mm (MPN GMC-4-R)
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BUSSMANN Fuse: S505 Series, Time-Delay, 800 mA, 250 V AC, Non-Indicating, 5 mm x 20 mm (MPN S505-800-R)
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BUSSMANN Fuse: S505 Series, Time-Delay, 800 mA, 250 V AC, Non-Indicating, 5 mm x 20 mm (MPN S505-800-R)