IDENTIFICATION GUIDE
CBFS, CBFSR AND CBFSG
CONTACT BLOCKS
Purpose of the document:
This document is intended to clarify the distinction between 30mm H-Line hermetically and factory-sealed contact blocks, specifically CBFS, CBFSR and CBFSG variants. While all three variants share the same rating, are labeled under the CBFS series, there are subtle differences in their physical construction that can be used to accurately and physically distinguish between them.
The goal of this document is to provide clear guidance to identify the three contact block types when observed beside each other.
Overview:
All three variants CBFS, CBFSR and CBFSG are Factory Sealed Contact Blocks featuring:
- 1 Normally Open (NO) and 1 Normally Closed (NC) contact
- 10 amp rating
- Designed for use in 30mm Hazardous product series
| Part Code | CBFS | CBFSR | CBFSG |
| Product Specification | |||
| Description | 30MM, Contact Blocks, Factory Sealed for Linear Device, 10A | 30MM, Contact Blocks, Factory Sealed for Rotary Device, 10A | LT60MQ25, 30MM, Contact Blocks, Factory Sealed for Linear Device, 10A, (Gold) |
| Used with Device Type | Linear Devices (e.g. Push Buttons, PTT) | Rotary Devices (e.g. Selector Switches) | Linear Devices (e.g. Push Buttons, PTT) |
| Operating Type | Push / Pull | Rotational | Push / Pull |
| Contact Type | 1NO + 1NC | 1NO + 1NC | 1NO + 1NC Gold Plated Contacts |
| Visual Comparison (see page 2) | |||
| Name Plate Color | Red | Red | Yellow |
| Stroker | Metal pin that interfaces with linear device operator | Has a white plastic cap to interface with rotary devices | Metal pin that interfaces with linear device operator |
| Bracket Height | 1.052” | 1.389” (Taller) | 1.052” |
| Contact Block Height | 1.937” | 2.291” (Taller) | 1.937” |
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Documents / Resources
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c3controls CBFS 30MM Contact Block [pdf] Instructions CBFS, CBFSR, CBFSG, CBFS 30MM Contact Block, CBFS, 30MM Contact Block, Contact Block, Block |