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

MERSEN GSB5 Fast-Acting Cylindrical Fuse, 5 A, 250 V AC, 5.1 mm x 20.1 mm - Fast-Acting Cylindrical Fuses
MERSENFast-Acting Cylindrical Fuses

MERSEN GSB5 Fast-Acting Cylindrical Fuse, 5 A, 250 V AC, 5.1 mm x 20.1 mm

The MERSEN GSB Series Fast-Acting Cylindrical Fuse (MPN GSB5) is a 5 A, 250 V AC fuse with a 5.1 mm x 20.1 mm form factor. This fast-acting fuse is designed for overcurrent protection in industrial equipment.

SKU 3G-OTH-153069

Also listed as: GSB 5 · GSB-5

Brand
MERSEN
Item
GSB5 Fast-Acting Cylindrical Fuse, 5 A, 250 V AC, 5.1 mm x 20.1 mm
Category
Fast-Acting Cylindrical Fuses
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
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

Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

MERSEN
Manufacturer Part Number
GSB5

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 GSB Series Fast-Acting Cylindrical Fuse (MPN GSB5) is a 5 A, 250 V AC fuse with a 5.1 mm x 20.1 mm form factor. This fast-acting fuse is designed for overcurrent protection in industrial equipment.

Frequently Asked Questions

What is the MERSEN GSB5 fuse used for?

The MERSEN GSB5 fast-acting cylindrical fuse provides overcurrent protection in industrial equipment. It is commonly used in control panels, power supplies, and machinery where sensitive components require rapid interruption of fault currents to prevent damage.

What are the specifications of the MERSEN GSB5 fuse?

The MERSEN GSB5 is a fast-acting cylindrical fuse rated at 5 A and 250 V AC. It has a physical size of 5.1 mm x 20.1 mm and is part of the GSB Series. This fuse is designed for overcurrent protection in industrial applications.

Where to buy MERSEN GSB5 fuses worldwide?

3G Electric supplies the MERSEN GSB5 fuse worldwide. As a global industrial equipment distributor, we handle full logistics, customs clearance, and delivery to your location. Contact us to source this fuse for your project.

How to select the correct MERSEN GSB fuse for my application?

To select the correct MERSEN GSB fuse, match the voltage rating (250 V AC) and current rating (5 A for the GSB5) to your circuit requirements. Ensure the fast-acting characteristic suits your equipment's sensitivity. Verify the physical size (5.1 mm x 20.1 mm) fits your fuse holder.

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 fast-acting 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

Compatible alternatives & equivalents

Cross-referenced by specification & description
Fast-acting cylindrical fuse rated 4 A, 250 V AC with a 5.1 mm x 20.1 mm body. Provides overcurrent protection in control panels, power supplies, and industrial machinery. Fits standard 5x20 mm fuse holders
MERSEN
Fast-acting cylindrical fuse rated 4 A, 250 V AC with a 5.1 mm x 20.1 mm body. Provides overcurrent protection in control panels, power supplies, and industrial machinery. Fits standard 5x20 mm fuse holders
Fast-acting cylindrical fuse rated 6.3 A at 250 V AC, with 5 mm x 20 mm dimensions. Designed for overcurrent protection in sensitive electronic circuits, control panels, power supplies, and instrumentation
MERSEN
Fast-acting cylindrical fuse rated 6.3 A at 250 V AC, with 5 mm x 20 mm dimensions. Designed for overcurrent protection in sensitive electronic circuits, control panels, power supplies, and instrumentation
Fast-acting cylindrical fuse rated 8 A at 250 V AC, with a 5.1 mm x 20.1 mm cartridge form factor. Provides overcurrent protection in power supplies, control panels, and instrumentation where rapid response to fault currents is required
MERSEN
Fast-acting cylindrical fuse rated 8 A at 250 V AC, with a 5.1 mm x 20.1 mm cartridge form factor. Provides overcurrent protection in power supplies, control panels, and instrumentation where rapid response to fault currents is required
Fast-acting cylindrical fuse rated at 3.15 A and 250 V AC, with dimensions of 5.1 mm x 20.1 mm. Designed for overcurrent protection in industrial equipment, control panels, power supplies, and automation systems where quick interruption of fault currents is required to safeguard sensitive circuits
MERSEN
Fast-acting cylindrical fuse rated at 3.15 A and 250 V AC, with dimensions of 5.1 mm x 20.1 mm. Designed for overcurrent protection in industrial equipment, control panels, power supplies, and automation systems where quick interruption of fault currents is required to safeguard sensitive circuits
Fast-acting cylindrical fuse rated 2.5 A, 250 V AC, with physical dimensions 5.1 mm x 20.1 mm. Provides overcurrent protection in industrial equipment such as control panels, power supplies, and machinery
MERSEN
Fast-acting cylindrical fuse rated 2.5 A, 250 V AC, with physical dimensions 5.1 mm x 20.1 mm. Provides overcurrent protection in industrial equipment such as control panels, power supplies, and machinery
Fast-acting cylindrical fuse rated 800 mA at 250 V AC. Dimensions 5.1 mm x 20.1 mm. Provides overcurrent protection in industrial equipment and sensitive electronic circuits
MERSEN
Fast-acting cylindrical fuse rated 800 mA at 250 V AC. Dimensions 5.1 mm x 20.1 mm. Provides overcurrent protection in industrial equipment and sensitive electronic circuits

More from MERSEN

View all MERSEN parts
Fast-acting cylindrical fuse rated 2 A at 250 V AC. Non-indicating design with 5 mm x 20 mm body. Suitable for overcurrent protection in control panels, power supplies, and instrumentation. Equivalent to GDA, S501, and 216 series
MERSEN
Fast-acting cylindrical fuse rated 2 A at 250 V AC. Non-indicating design with 5 mm x 20 mm body. Suitable for overcurrent protection in control panels, power supplies, and instrumentation. Equivalent to GDA, S501, and 216 series
Fast-acting cylindrical fuse rated 15 A at 1.5 kV DC. Part of the HP15MxxR series. Used for overcurrent protection in photovoltaic systems, including solar panel circuits and combiner boxes
MERSEN
Fast-acting cylindrical fuse rated 15 A at 1.5 kV DC. Part of the HP15MxxR series. Used for overcurrent protection in photovoltaic systems, including solar panel circuits and combiner boxes
Fast-acting midget fuse rated 600 mA at 600 V AC. Non-indicating design with dimensions 13/32 in x 1 3/8 in. Used for overcurrent protection in control panels, instrumentation, and power supplies where rapid response to faults is required
MERSEN
Fast-acting midget fuse rated 600 mA at 600 V AC. Non-indicating design with dimensions 13/32 in x 1 3/8 in. Used for overcurrent protection in control panels, instrumentation, and power supplies where rapid response to faults is required
Fast-acting cylindrical fuse from the HP15P Series, rated 40 A and 1.5 kV DC. Designed for overcurrent protection in photovoltaic systems, including solar panel strings and combiner boxes
MERSEN
Fast-acting cylindrical fuse from the HP15P Series, rated 40 A and 1.5 kV DC. Designed for overcurrent protection in photovoltaic systems, including solar panel strings and combiner boxes
Fast-acting cylindrical fuse rated 2 A at 250 V AC, with dimensions 5.1 mm x 20.1 mm. Provides overcurrent protection in control panels, power supplies, and industrial machinery
MERSEN
Fast-acting cylindrical fuse rated 2 A at 250 V AC, with dimensions 5.1 mm x 20.1 mm. Provides overcurrent protection in control panels, power supplies, and industrial machinery
The MERSEN RF15 is a Class H fast-acting cylindrical fuse rated 15 A at 250 V AC. It is non-indicating, meaning it does not provide a visual blown indication. This fuse is used for overcurrent protection in industrial electrical circuits, such as control panels and distribution equipment, where rapid response to short circuits is required
MERSEN
The MERSEN RF15 is a Class H fast-acting cylindrical fuse rated 15 A at 250 V AC. It is non-indicating, meaning it does not provide a visual blown indication. This fuse is used for overcurrent protection in industrial electrical circuits, such as control panels and distribution equipment, where rapid response to short circuits is required
Fast-acting cylindrical fuse rated 12 A and 1000 V DC with AC/DC voltage compatibility. Provides overcurrent protection in DC circuits such as solar photovoltaic systems, combiner boxes, and inverters
MERSEN
Fast-acting cylindrical fuse rated 12 A and 1000 V DC with AC/DC voltage compatibility. Provides overcurrent protection in DC circuits such as solar photovoltaic systems, combiner boxes, and inverters
Fast-acting midget fuse rated 500 mA, 600 V AC and 600 V DC. Measures 13/32 in x 1 1/2 in. Used for overcurrent protection in control panels, instrumentation, and power supplies where rapid interruption is required
MERSEN
Fast-acting midget fuse rated 500 mA, 600 V AC and 600 V DC. Measures 13/32 in x 1 1/2 in. Used for overcurrent protection in control panels, instrumentation, and power supplies where rapid interruption is required