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Robertshaw Class 2 Transformer: 48 VA Power Rating, 120V AC/208V AC/240V AC - Open Class 2 Transformers
RobertshawOpen Class 2 Transformers

Robertshaw Class 2 Transformer: 48 VA Power Rating, 120V AC/208V AC/240V AC

The ROBERTSHAW Class 2 Transformer (SKU 6JZX3, MPN 620-402) is an open Class 2 transformer with a 48 VA power rating. It features a foot mounting, a 240V AC input voltage, and a 2.5V AC output voltage, with wire lead…

SKU 3G-OTH-47112

Brand
Robertshaw
Item
Class 2 Transformer: 48 VA Power Rating, 120V AC/208V AC/240V AC
Category
Open Class 2 Transformers
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Technical Specifications

Robertshaw
Manufacturer Part Number
620-402
Mounting
Foot
Input Voltage
240V AC
Output Voltage
2.5V AC
AC/24V AC/2.5V AC
12V
AC/208V AC/240V AC
120V
Connection - Primary
Wire Lead
Connection - Secondary
Wire Lead
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Robertshaw Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The ROBERTSHAW Class 2 Transformer (SKU 6JZX3, MPN 620-402) is an open Class 2 transformer with a 48 VA power rating. It features a foot mounting, a 240V AC input voltage, and a 2.5V AC output voltage, with wire lead connections for both primary and secondary sides.

Frequently Asked Questions

What is a Robertshaw Class 2 transformer used for?

A Robertshaw Class 2 transformer steps down high input voltage to a lower, safe output voltage for control circuits in HVAC, lighting, and industrial automation. This model supplies 48 VA at 2.5V AC from a 240V AC input, powering relays, contactors, and low-voltage controls.

What are the specifications of the Robertshaw 620-402 transformer?

The Robertshaw 620-402 is a 48 VA open Class 2 transformer with foot mounting. Input voltage is 240V AC; output voltage is 2.5V AC. Both primary and secondary connections use wire leads. It also accepts 120V AC and 208V AC inputs for multi-voltage flexibility.

Where to buy a Robertshaw 620-402 transformer worldwide?

3G Electric supplies the Robertshaw 620-402 transformer to customers worldwide. We handle full logistics, customs clearance, and delivery to your site. Contact us for a quote and lead time; we source genuine Robertshaw components for industrial control applications globally.

How to install a Robertshaw Class 2 transformer?

Mount the transformer securely using its foot bracket. Connect primary wire leads to a 240V AC (or 120V/208V AC) supply per local codes. Connect secondary leads to the 2.5V AC load. Ensure the total VA draw does not exceed 48 VA. Always de-energize before wiring.

Used in

Common applications for Robertshaw
Commercial HVAC — Robertshaw RS10420T digital WiFi thermostat for programmable heat and cool control in office buildings
Furnace ignition — Robertshaw 41-230 universal hot surface ignitor for silicon carbide replacement in residential and light commercial furnaces
Airflow monitoring — Robertshaw 2374-509 adjustable air pressure switch for draft sensing in industrial burner systems
Gas-fired equipment — Robertshaw 1820-009 universal pilot assembly with thermopile for natural gas or LP water heaters and boilers
Vibration protection — Robertshaw 366A0 mechanical vibration switch for pump and compressor monitoring in industrial plants
OEM replacement — Robertshaw 41-428N direct spark igniter for Trane HVAC equipment requiring silicon nitride ignitors

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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