We value your privacy

We use cookies to enhance your browsing experience, serve personalised ads or content, and analyse our traffic. By clicking "Accept All", you consent to our use of cookies.

Customize Consent Preferences

We use cookies to help you navigate efficiently and perform certain functions. You will find detailed information about all cookies under each consent category below.

The cookies that are categorised as "Necessary" are stored on your browser as they are essential for enabling the basic functionalities of the site. ... 

Always Active

Necessary cookies are required to enable the basic features of this site, such as providing secure log-in or adjusting your consent preferences. These cookies do not store any personally identifiable data.

  • Cookie
    PHPSESSID
  • Duration
    Session
  • Description
    Parts PDF data array
  • Cookie
    cookieyes-consent
  • Duration
    1 day
  • Description
    CookieYes consent

Functional cookies help perform certain functionalities like sharing the content of the website on social media platforms, collecting feedback, and other third-party features.

No cookies to display.

Analytical cookies are used to understand how visitors interact with the website. These cookies help provide information on metrics such as the number of visitors, bounce rate, traffic source, etc.

No cookies to display.

Performance cookies are used to understand and analyse the key performance indexes of the website which helps in delivering a better user experience for the visitors.

No cookies to display.

Advertisement cookies are used to provide visitors with customised advertisements based on the pages you visited previously and to analyse the effectiveness of the ad campaigns.

No cookies to display.

Replacement Parts
› › › › 620-404
Robertshaw part number 620-404
Find a Distributor

620-404

620 Series Transformers

Brand Name Robertshaw

The Robertshaw® 620 Series Transformers are available in a wide variety of models from universal enclosed to single voltage open frame models. UL approved 1411. Meets applicable NEMA standards. Thermal fuse protection. UL File No. E92807 UPC:  662013639693

Key Specs

AttributeValue
Series Application620 Series Transformers
ModelUniversal Mounting - Foot, 4x4 Plate or Hub Mount
Rating (VA)40VA
Primary Voltage208/240V AC, 50/60 Hz
Primary Lead Length8" (203mm)
Secondary Voltage24V AC, 50/60 Hz
Secondary Lead Length8" (203mm)
Agency ApprovalsUL 1411

Documents, Prints, etc.

thumbnail image of 620 Series Transformers Sell Sheet PDF620 Series Transformers Sell SheetSell Sheets

Competitor Cross-Reference

Part #Manufacturer
4A424LITT/GENERAL CONTROL
4B421LITT/GENERAL CONTROL
50303MARS
64045UNI-LINE
90-4021MWESTWARD
90-4031MWESTWARD
90-557ESSEX
90-T40M2WHITE-RODGERS
AT120A1004HONEYWELL
AT140A1018HONEYWELL
AT20A1691HONEYWELL
AT7201691HONEYWELL
AT72D1691HONEYWELL
BTR-404BEKO
GT442GEMLINE
GT461GEMLINE
L36-289JOHNSTONE SUPPLY
PM32440PACKARD
S81-130WHITE-RODGERS
S81-374WHITE-RODGERS
S84G-11WHITE-RODGERS
SE-40BMSOUTHEAST IND. INC.
SXT113SUPCO
TPF324-40JARD
Y61BJ-1JOHNSON CONTROLS
Y61BR-1JOHNSON CONTROLS
Y61SR-1JOHNSON CONTROLS
Y65BJ-1JOHNSON CONTROLS
Y65BR-1JOHNSON CONTROLS
Y65SP-1JOHNSON CONTROLS
Y65SR-1JOHNSON CONTROLS