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3G Electric
Robertshaw Open Class 2 Transformer - Open Class 2 Transformers
RobertshawOpen Class 2 Transformers

Robertshaw Open Class 2 Transformer

<p>The Robertshaw Open Class 2 Transformer (MPN 620-501) is a reliable power conversion solution for HVAC and industrial control applications. It steps down 240V AC input to 28V AC output at 50VA, featuring a primary…

SKU 3G-OTH-49291

Also listed as: 620501 · 620 501

Brand
Robertshaw
Item
Open Class 2 Transformer
Part Number
620-501
Category
Open Class 2 Transformers
Available to Order
Also known as:620-501Robertshaw
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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

Robertshaw
Manufacturer Part Number
620-501
Type
Primary Fuse
AC
28V
Mounting
Foot
Input Voltage
240V AC
Output Voltage
28V AC
AC/208V AC/240V AC
120V
Connection - Primary
Wire Lead
Connection - Secondary
Screw Terminal

Technical Documents

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

Product Description

<p>The Robertshaw Open Class 2 Transformer (MPN 620-501) is a reliable power conversion solution for HVAC and industrial control applications. It steps down 240V AC input to 28V AC output at 50VA, featuring a primary fuse for protection and a foot mount for secure installation. The primary connection uses wire leads, while the secondary uses screw terminals for easy wiring.</p><p>This transformer is ideal for contractors and facilities managers needing a robust power source for control circuits. As a Singapore-based supplier, 3G Electric offers SGD quotes on request, handles GST for local buyers, and provides fast delivery across Singapore and Southeast Asia.</p>

Frequently Asked Questions

What are the input and output voltages of the Robertshaw 620-501?

The input voltage is 240V AC, and the output voltage is 28V AC. It also supports 120V AC and 208V AC inputs as per the specifications.

How is the transformer mounted and connected?

It has a foot mount for installation. The primary connection uses wire leads, and the secondary connection uses screw terminals.

Used in

Common applications for Robertshaw
Commercial cooking equipment — Robertshaw 66004-AF80 electric cooking limit control for Whirlpool ovens and fryers, 240 V AC, 1 in stem.
Industrial vibration monitoring — Robertshaw 6000-107 mechanical vibration sensor switch with DPDT contacts, 7 A at 460 V AC, hazardous location rated.
Gas-fired appliance repair — Robertshaw Unitrol button (BLO10318) for gas control assemblies in heating and cooking equipment.
Commercial ovens and griddles — Robertshaw 5225-112 electric limit control with 100 to 450 dial, 30 in capillary, 250 V AC.
Foodservice equipment maintenance — Robertshaw 5502-307M electric cooking control for Nemco applications, 120 V AC, 1 1/8 in stem.
OEM replacement for Electrolux cooking appliances — Robertshaw 66004-AF71 electric limit control, 240 V AC, 3/4 in stem.
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Robertshaw Products

3G Electric supplies Robertshaw open class 2 transformers. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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Open Class 2 transformer with foot mounting. Input voltage 240V AC; output voltage 2.5V AC. Wire lead connections on primary and secondary. Commonly used to step down line voltage for low-voltage control circuits in HVAC and industrial equipment
Robertshaw
Open Class 2 transformer with foot mounting. Input voltage 240V AC; output voltage 2.5V AC. Wire lead connections on primary and secondary. Commonly used to step down line voltage for low-voltage control circuits in HVAC and industrial equipment

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