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
Siemens HR66A Fuse Kit, UL Class R, 600V AC, 600 A Disconnect Switch - Fuse Kits
SiemensFuse Kits

Siemens HR66A Fuse Kit, UL Class R, 600V AC, 600 A Disconnect Switch

Siemens Fuse Kits.

SKU 3G-OTH-24946

Brand
Siemens
Item
HR66A Fuse Kit, UL Class R, 600V AC, 600 A Disconnect Switch
Category
Fuse Kits
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

Siemens
Manufacturer Part Number
HR66A

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

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

Product Description

Siemens Fuse Kits.

Frequently Asked Questions

What is the SIEMENS HR66A fuse kit used for?

The SIEMENS HR66A fuse kit is used to convert a disconnect switch to fuse protection in industrial power distribution. It accepts UL Class R fuses rated 600 V AC and fits a 600 A disconnect switch, ensuring overcurrent protection in manufacturing, HVAC, and process control systems.

What are the specifications of the SIEMENS HR66A fuse kit?

The SIEMENS HR66A fuse kit is designed for UL Class R fuses, rated 600 V AC, and fits a disconnect switch size of 600 A. It is manufactured by Siemens under part number HR66A. This kit enables fuse-based overcurrent protection in high-current industrial circuits.

Where to buy the SIEMENS HR66A fuse kit worldwide?

3G Electric supplies the SIEMENS HR66A fuse kit worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your site. Contact us to order this genuine Siemens fuse kit for your disconnect switch application.

How to select the correct fuse kit for a 600 A disconnect switch?

To select the correct fuse kit, match the disconnect switch amp rating and voltage class. The SIEMENS HR66A is specifically designed for 600 A switches at 600 V AC and accepts UL Class R fuses. Always verify the switch model and fuse class compatibility before ordering.

Used in

Common applications for Siemens
District cooling plants — LME73 + RWF55 for condenser-water modulation
Inflight catering and food-processing steam boilers — LMG22 with SQN90 air-fuel cross-damper
Hospital steam-plant redundancy — LME41 with QRA2 UV flame detection for dual-fuel boilers
Semiconductor fab process heat — LME23 and SKP55 gas valves on hot-oil heater skids
Container-terminal reefer-deck heating — LMG22 retrofit onto legacy burner racks

Siemens Products

3G Electric supplies Siemens fuse kits. 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
UL Class R fuse rejection kit for converting 200 A disconnect switches to accept Class R fuses, preventing insertion of lower-rated fuses. Rated 600V AC. Suitable for industrial panelboards, motor control centers, and distribution equipment requiring Class R rejection
Siemens
UL Class R fuse rejection kit for converting 200 A disconnect switches to accept Class R fuses, preventing insertion of lower-rated fuses. Rated 600V AC. Suitable for industrial panelboards, motor control centers, and distribution equipment requiring Class R rejection
The Siemens HR63 is a UL Class R fuse rejection kit rated for 600V AC. It is designed for use with disconnect switches sized at 100 A. The kit adapts Class H fuse holders to accept only Class R fuses, preventing insertion of non-rejection fuses. Suitable for industrial power distribution panels and motor control centers
Siemens
The Siemens HR63 is a UL Class R fuse rejection kit rated for 600V AC. It is designed for use with disconnect switches sized at 100 A. The kit adapts Class H fuse holders to accept only Class R fuses, preventing insertion of non-rejection fuses. Suitable for industrial power distribution panels and motor control centers
UL Class R fuse rejection kit for upgrading Class H fuse holders to accept only rejection-type fuses. Rated 600V AC, designed for disconnect switches sized 30 A. Prevents insertion of non-rejection fuses, enhancing safety in industrial power distribution and motor control applications
Siemens
UL Class R fuse rejection kit for upgrading Class H fuse holders to accept only rejection-type fuses. Rated 600V AC, designed for disconnect switches sized 30 A. Prevents insertion of non-rejection fuses, enhancing safety in industrial power distribution and motor control applications
This Siemens fusible disconnect switch is rated 200 A at 600V AC, three-phase, for indoor use with positive polarity. It is UL 98B certified and suitable for isolating electrical circuits in commercial or industrial applications where a grounded safety disconnect is required
Siemens
This Siemens fusible disconnect switch is rated 200 A at 600V AC, three-phase, for indoor use with positive polarity. It is UL 98B certified and suitable for isolating electrical circuits in commercial or industrial applications where a grounded safety disconnect is required
This Siemens fusible disconnect switch is rated for 100 A and 600V AC, three-phase, indoor use with positive polarity. It is UL 98B certified for photovoltaic disconnect applications. The switch provides safe isolation for solar photovoltaic systems during maintenance or emergencies
Siemens
This Siemens fusible disconnect switch is rated for 100 A and 600V AC, three-phase, indoor use with positive polarity. It is UL 98B certified for photovoltaic disconnect applications. The switch provides safe isolation for solar photovoltaic systems during maintenance or emergencies
Three-phase fusible disconnect switch rated 60 A and 600V AC for indoor use. Features positive polarity and UL 98B certification. Suitable for use in photovoltaic systems requiring a grounded disconnection means
Siemens
Three-phase fusible disconnect switch rated 60 A and 600V AC for indoor use. Features positive polarity and UL 98B certification. Suitable for use in photovoltaic systems requiring a grounded disconnection means

More from Siemens

View all Siemens parts →
The Siemens HR21 is a UL Class R fuse rejection kit rated for 240V AC. It is designed for use with a 30A disconnect switch to accept Class R fuses, preventing insertion of lower-rated fuses. Commonly applied in industrial control panels and motor disconnects
Siemens
The Siemens HR21 is a UL Class R fuse rejection kit rated for 240V AC. It is designed for use with a 30A disconnect switch to accept Class R fuses, preventing insertion of lower-rated fuses. Commonly applied in industrial control panels and motor disconnects
Fuse kit for use with UL Class T fuses rated 600 V AC. Designed for disconnect switches with a 600 A size. Provides overcurrent protection in industrial electrical distribution panels, motor control centers, and heavy machinery
Siemens
Fuse kit for use with UL Class T fuses rated 600 V AC. Designed for disconnect switches with a 600 A size. Provides overcurrent protection in industrial electrical distribution panels, motor control centers, and heavy machinery
Fuse kit for use with UL Class T fuses rated 600 V AC. Designed to fit disconnect switches sized for 400 A. Enables fuse mounting and replacement in industrial circuits requiring overcurrent protection
Siemens
Fuse kit for use with UL Class T fuses rated 600 V AC. Designed to fit disconnect switches sized for 400 A. Enables fuse mounting and replacement in industrial circuits requiring overcurrent protection
This fuse rejection kit is designed for use with 60 A disconnect switches rated 600V AC. It accepts UL Class R fuses, preventing insertion of non-Class R fuses. Typical applications include industrial panel building and motor control centers
Siemens
This fuse rejection kit is designed for use with 60 A disconnect switches rated 600V AC. It accepts UL Class R fuses, preventing insertion of non-Class R fuses. Typical applications include industrial panel building and motor control centers
Fuse kit for use with disconnect switches rated up to 400 A. Accepts UL Class R fuses at 600 V AC. Suitable for overcurrent protection in industrial power distribution equipment such as motor control centers and panelboards
Siemens
Fuse kit for use with disconnect switches rated up to 400 A. Accepts UL Class R fuses at 600 V AC. Suitable for overcurrent protection in industrial power distribution equipment such as motor control centers and panelboards
Fuse kit for use in industrial disconnect switches rated up to 600 A. Accepts UL Class J fuses at 600 V AC. Suitable for overcurrent protection in motor control centers, panelboards, and distribution equipment
Siemens
Fuse kit for use in industrial disconnect switches rated up to 600 A. Accepts UL Class J fuses at 600 V AC. Suitable for overcurrent protection in motor control centers, panelboards, and distribution equipment
Fuse adapter kit designed to mount UL Class T fuses in disconnect switches rated up to 400 A at 240 V AC. Enables secure fuse mounting in compatible switchgear for industrial power distribution and motor control applications
Siemens
Fuse adapter kit designed to mount UL Class T fuses in disconnect switches rated up to 400 A at 240 V AC. Enables secure fuse mounting in compatible switchgear for industrial power distribution and motor control applications
The Siemens HT26A fuse kit is designed for use with disconnect switches rated up to 600 A. It accepts UL Class T fuses at 240 V AC, providing overcurrent protection for branch circuits and feeder applications. The kit includes mounting hardware for installation in compatible Siemens disconnect switches
Siemens
The Siemens HT26A fuse kit is designed for use with disconnect switches rated up to 600 A. It accepts UL Class T fuses at 240 V AC, providing overcurrent protection for branch circuits and feeder applications. The kit includes mounting hardware for installation in compatible Siemens disconnect switches