Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

3G Electric
RFQ CartGet a QuoteSign inSign up
MERSEN Fuse: GSF Series, Time-Delay, 500 mA, 250 V AC, Non-Indicating - Time-Delay Cylindrical Fuses
MERSENTime-Delay Cylindrical Fuses

MERSEN Fuse: GSF Series, Time-Delay, 500 mA, 250 V AC, Non-Indicating

The MERSEN GSF Series is a time-delay cylindrical fuse, model GSF1/2, rated at 500 mA and 250 V AC. It is a non-indicating fuse with a 5 mm x 20 mm form factor. This fuse is equivalent to the S505, 477, and GSF series.

SKU 3G-OTH-26113

Brand
MERSEN
Item
Fuse: GSF Series, Time-Delay, 500 mA, 250 V AC, Non-Indicating
Category
Time-Delay Cylindrical Fuses
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineer
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Technical Specifications

MERSEN
Manufacturer Part Number
GSF1/2
Series
GSF
Type
Time-Delay, 500 mA, Non-Indicating, 5 mm x 20 mm
AC
250 V
Equivalent Fuse Series
S505, 477, & GSF
View Full Spec Sheet

Technical Documents

No technical documents available for this product.
Request documentation →
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

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

Product Description

The MERSEN GSF Series is a time-delay cylindrical fuse, model GSF1/2, rated at 500 mA and 250 V AC. It is a non-indicating fuse with a 5 mm x 20 mm form factor. This fuse is equivalent to the S505, 477, and GSF series.

Frequently Asked Questions

What is the MERSEN GSF1/2 fuse used for?

The MERSEN GSF1/2 is a time-delay cylindrical fuse rated at 500 mA and 250 V AC. It protects sensitive industrial circuits from overloads and short circuits, commonly found in control panels, power supplies, and instrumentation across machining, electrical, and HVAC systems.

What are the specifications of the MERSEN GSF1/2 fuse?

The MERSEN GSF1/2 is a 500 mA, 250 V AC time-delay fuse in a 5 mm x 20 mm non-indicating package. It belongs to the GSF series and is equivalent to S505, 477, and GSF series fuses. The manufacturer part number is GSF1/2.

Where to buy MERSEN GSF1/2 fuses worldwide?

3G Electric supplies MERSEN GSF1/2 fuses worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your site. Contact us for pricing and lead time on this time-delay fuse rated at 500 mA and 250 V AC.

How to select a replacement for the MERSEN GSF1/2 fuse?

To select a replacement for the MERSEN GSF1/2, verify the voltage rating (250 V AC), current rating (500 mA), and form factor (5 mm x 20 mm). Ensure the replacement is a time-delay type and check compatibility with equivalent series such as S505 or 477. 3G Electric can help source the correct part.

Used in

Common applications for MERSEN
Power electronics protection — MERSEN A70Q series semiconductor fuses in variable frequency drives for motor control.
Surge protection for industrial panels — MERSEN STP480D07 SPDs in three-phase 480V AC distribution boards.
Control circuit overcurrent protection — MERSEN ATM series midget fuses in PLC and instrumentation cabinets.
Power distribution in manufacturing — MERSEN FSPDB4A finger-safe blocks in motor control centers for wire management.
DC bus protection in renewable energy — MERSEN A30QS series fuses in solar inverter DC inputs.
High-voltage semiconductor protection — MERSEN A70Q series fuses in welding equipment power supplies.

MERSEN Products

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

You might also need

Burners & Combustion →Pumps & Compressors →Spare Parts →All Products →

Similar products

Matched by specification & description
MERSEN Fuse: GSF Series, Time-Delay, 2 A, 250 V AC, Non-Indicating, 5 mm x 20 mm, S505, 477, & GSF (MPN GSF2). Key specifications — Brand: MERSEN; Series: GSF; Equivalent Fuse Series: S505, 477, & GSF.
MERSEN
MERSEN Fuse: GSF Series, Time-Delay, 2 A, 250 V AC, Non-Indicating, 5 mm x 20 mm, S505, 477, & GSF (MPN GSF2). Key specifications — Brand: MERSEN; Series: GSF; Equivalent Fuse Series: S505, 477, & GSF.
MERSEN Fuse: GSF Series, Time-Delay, 1 A, 250 V AC, Non-Indicating, 5 mm x 20 mm, S505, 477, & GSF (MPN GSF1). Key specifications — Brand: MERSEN; Series: GSF; Equivalent Fuse Series: S505, 477, & GSF.
MERSEN
MERSEN Fuse: GSF Series, Time-Delay, 1 A, 250 V AC, Non-Indicating, 5 mm x 20 mm, S505, 477, & GSF (MPN GSF1). Key specifications — Brand: MERSEN; Series: GSF; Equivalent Fuse Series: S505, 477, & GSF.
MERSEN Fuse: GSF Series, Time-Delay, 5 A, 250 V AC, Non-Indicating, 5 mm x 20 mm, S505, 477, & GSF (MPN GSF5). Key specifications — Brand: MERSEN; Series: GSF; Equivalent Fuse Series: S505, 477, & GSF.
MERSEN
MERSEN Fuse: GSF Series, Time-Delay, 5 A, 250 V AC, Non-Indicating, 5 mm x 20 mm, S505, 477, & GSF (MPN GSF5). Key specifications — Brand: MERSEN; Series: GSF; Equivalent Fuse Series: S505, 477, & GSF.
MERSEN Fuse: GSF Series, Time-Delay, 4 A, 250 V AC, Non-Indicating, 5 mm x 20 mm, S505, 477, & GSF (MPN GSF4). Key specifications — Brand: MERSEN; Series: GSF; Equivalent Fuse Series: S505, 477, & GSF.
MERSEN
MERSEN Fuse: GSF Series, Time-Delay, 4 A, 250 V AC, Non-Indicating, 5 mm x 20 mm, S505, 477, & GSF (MPN GSF4). Key specifications — Brand: MERSEN; Series: GSF; Equivalent Fuse Series: S505, 477, & GSF.
MERSEN Fuse: GSF Series, Time-Delay, 800 mA, 250 V AC, Non-Indicating, 5 mm x 20 mm (MPN GSF8/10). Key specifications — Brand: MERSEN; Series: GSF; Equivalent Fuse Series: S505, 477, & GSF.
MERSEN
MERSEN Fuse: GSF Series, Time-Delay, 800 mA, 250 V AC, Non-Indicating, 5 mm x 20 mm (MPN GSF8/10). Key specifications — Brand: MERSEN; Series: GSF; Equivalent Fuse Series: S505, 477, & GSF.
MERSEN Fuse: GSF Series, Time-Delay, 6.3 A, 250 V AC, Non-Indicating, 5 mm x 20 mm, S505, 477, & GSF (MPN GSF6-3/10). Key specifications — Brand: MERSEN; Series: GSF; Equivalent Fuse Series: S505, 477, & GSF.
MERSEN
MERSEN Fuse: GSF Series, Time-Delay, 6.3 A, 250 V AC, Non-Indicating, 5 mm x 20 mm, S505, 477, & GSF (MPN GSF6-3/10). Key specifications — Brand: MERSEN; Series: GSF; Equivalent Fuse Series: S505, 477, & GSF.

More from MERSEN

View all MERSEN parts →
MERSEN Fuse: Class RK5, TR-R Series, Time-Delay, 200 mA, 250 V AC, 250 V DC, Non-Indicating (MPN TR2/10R). Key specifications — Series: TR-R.
MERSEN
MERSEN Fuse: Class RK5, TR-R Series, Time-Delay, 200 mA, 250 V AC, 250 V DC, Non-Indicating (MPN TR2/10R). Key specifications — Series: TR-R.
MERSEN Fuse: Class RK5, TRS-R Series, Time-Delay, 40 A, 600 V AC, 300 V DC, Non-Indicating (MPN TRS40R). Key specifications — Series: TRS-R.
MERSEN
MERSEN Fuse: Class RK5, TRS-R Series, Time-Delay, 40 A, 600 V AC, 300 V DC, Non-Indicating (MPN TRS40R). Key specifications — Series: TRS-R.
MERSEN Fuse: Class RK5, TRS-RID Series, Time-Delay, 35 A, 600 V AC, 300 V DC, Indicating (MPN TRS35RID). Key specifications — Series: TRS-RID.
MERSEN
MERSEN Fuse: Class RK5, TRS-RID Series, Time-Delay, 35 A, 600 V AC, 300 V DC, Indicating (MPN TRS35RID). Key specifications — Series: TRS-RID.
MERSEN Fuse: Class RK5, TRS-R Series, Time-Delay, 20 A, 600 V AC, 300 V DC, Non-Indicating (MPN TRS20R). Key specifications — Series: TRS-R.
MERSEN
MERSEN Fuse: Class RK5, TRS-R Series, Time-Delay, 20 A, 600 V AC, 300 V DC, Non-Indicating (MPN TRS20R). Key specifications — Series: TRS-R.
MERSEN Fuse: Class RK5, TRS-R Series, Time-Delay, 3.5 A, 600 V AC, 600 V DC, Non-Indicating (MPN TRS3-1/2R). Key specifications — Series: TRS-R.
MERSEN
MERSEN Fuse: Class RK5, TRS-R Series, Time-Delay, 3.5 A, 600 V AC, 600 V DC, Non-Indicating (MPN TRS3-1/2R). Key specifications — Series: TRS-R.
MERSEN Fuse: Class RK5, TR-R Series, Time-Delay, 150 mA, 250 V AC, 250 V DC, Non-Indicating (MPN TR15/100R). Key specifications — Series: TR-R.
MERSEN
MERSEN Fuse: Class RK5, TR-R Series, Time-Delay, 150 mA, 250 V AC, 250 V DC, Non-Indicating (MPN TR15/100R). Key specifications — Series: TR-R.
MERSEN Fuse: Class RK5, TRS-R Series, Time-Delay, 35 A, 600 V AC, 300 V DC, Non-Indicating (MPN TRS35R). Key specifications — Series: TRS-R.
MERSEN
MERSEN Fuse: Class RK5, TRS-R Series, Time-Delay, 35 A, 600 V AC, 300 V DC, Non-Indicating (MPN TRS35R). Key specifications — Series: TRS-R.
MERSEN Fuse: Class RK5, TRS-R Series, Time-Delay, 100 mA, 600 V AC, 600 V DC, Non-Indicating (MPN TRS1/10R). Key specifications — Series: TRS-R.
MERSEN
MERSEN Fuse: Class RK5, TRS-R Series, Time-Delay, 100 mA, 600 V AC, 600 V DC, Non-Indicating (MPN TRS1/10R). Key specifications — Series: TRS-R.