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

3G Electric
QMARK Manual Limit Switch 4520-2027-000 - Replacement HVACR Controls, Switches & Thermostats
QMARKReplacement HVACR Controls, Switches & Thermostats

QMARK Manual Limit Switch 4520-2027-000

QMARK Replacement HVACR Controls, Switches & Thermostats. Specifications: Product Type: Manual Limit.

SKU 3G-OTH-79807

Also listed as: 45202027000 · 4520 2027 000

Brand
QMARK
Item
Manual Limit Switch 4520-2027-000
Part Number
4520-2027-000
Category
Replacement HVACR Controls, Switches & Thermostats
Available to Order
Also known as:4520-2027-000QMARK
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

QMARK
Manufacturer Part Number
4520-2027-000
Product Type
Manual Limit

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

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

Product Description

QMARK Replacement HVACR Controls, Switches & Thermostats. Specifications: Product Type: Manual Limit.

Frequently Asked Questions

What is a QMARK manual limit switch used for?

A QMARK manual limit switch is a safety device used in HVACR systems to interrupt power when temperatures exceed safe limits. It protects heating equipment from overheating by requiring manual reset after a trip, ensuring reliable operation in commercial and industrial environments.

What are the specifications of the QMARK 4520-2027-000 manual limit?

The QMARK 4520-2027-000 is a manual limit switch for HVACR controls. Its key specification is the manufacturer part number 4520-2027-000 and product type as manual limit. For detailed electrical ratings or temperature thresholds, consult the OEM datasheet or contact 3G Electric for technical support.

Where to buy QMARK 4520-2027-000 manual limit worldwide?

3G Electric supplies the QMARK 4520-2027-000 manual limit switch 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 replacement HVACR control component.

How to install a QMARK manual limit switch?

To install a QMARK manual limit switch, first disconnect power to the HVACR system. Mount the switch securely in the designated location, typically near the heat exchanger. Connect wiring per the manufacturer's diagram, ensuring proper polarity. After installation, test the manual reset function before restoring power.

Used in

Common applications for QMARK
Warehouse heating — QMARK MUH-Pro series suspended unit heaters for large open spaces with 208/240 V or 480 V supply.
Commercial building lobbies — QMARK CDF557RE recessed ceiling panel heaters for discreet, fan-forced heating.
Industrial workshops — QMARK MUH154 standard suspended heater for 480 V, 3-phase applications requiring high heat output.
Retail storefronts — QMARK MUH107 wall-mounted heater for 277 V, 1-phase circuits in ceiling or wall installations.
Manufacturing facilities — QMARK MUH102-PRO with integrated controls for simplified installation in multi-zone heating systems.
Office partitions — QMARK QSF2424 mounting frame for surface-mounting 54UD25 heaters in areas with limited ceiling access.
Not sure this is the right part? Photo-identify it

QMARK Products

3G Electric supplies QMARK replacement hvacr controls, switches & thermostats. 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

More from QMARK

View all QMARK parts
QMARK
QMARK
Replacement transformer for HVACR control systems. Steps down voltage for use with thermostats, relays, and other control components in heating, ventilation, air conditioning, and refrigeration equipment
QMARK
QMARK
Limit control used in HVAC and refrigeration systems to monitor and limit temperature. Interrupts the circuit when a set temperature is exceeded, preventing overheating in heating and cooling equipment
QMARK
QMARK
This limit control is a replacement HVACR component used to monitor and limit temperature in heating and cooling systems. It interrupts the circuit when a set temperature is exceeded, helping to prevent overheating in commercial and industrial applications

Customer reviews

No reviews yet — be the first

Questions & answers

No questions yet — ask us the first