The Hammond BC2DA is a Class 2 energy limiting transformer from the BA-C-D-E small box mount series, rated 12 VA with a 120 V primary and a 10 V, 1.2 A secondary. It is used by electricians, HVAC and security installers and OEMs in chimes, door bells, security systems, decorative lighting, furnaces, humidifiers, appliances, vending machines and intercom type applications.
The BC2DA keeps the 10 V output of the BA2DA but raises the rating to 12 VA and 1.2 A, giving more current headroom for 10 V circuits.
The design is rugged, low noise and cool running, for indoor use only. It is 60 Hz and inherently limited, so no fuses or circuit breakers are required. Input (primary) connections are stripped wire leads, and the output (secondary) is a screw terminal / quick fit tab terminal. Input leads are black.
Installation is by nipple locknut mount into a box, and the transformer comes complete with locknut and mounting bracket. Overall dimensions are A 2.33 in (59 mm), B 2.22 in (56 mm) and C 1.98 in (50 mm), and the shipping weight is 1.03 lbs (0.47 kg).
The BC2DA is UL listed (#E184371) and CSA certified (209651), and is built to a 105 degree temperature design. It is also REACH and RoHS compliant.
| Series | BA-C-D-E Series Class 2 Energy Limiting Small Box Mount |
| Description | Transformer, Class 2 energy limiting, box mount, 12VA, 120V input, 10V output |
| Short Description | CLASS 2 TX 12VA 120V |
| Overall Dimension A | 2.33 in (59 mm) |
| Overall Dimension B | 2.22 in (56 mm) |
| Overall Dimension C | 1.98 in (50 mm) |
| Frequency | 60 Hz |
| Power Rating | 12 VA |
| Temperature Design | 105 degree temperature design |
| Primary Lead Colour | Black |
| Overcurrent Protection | Inherently limited - no fuses or circuit breakers |
| Primary (Input) Voltage | 120 VAC (RMS) |
| Secondary (Output) Current | 1.2 A (RMS) |
| Secondary (Output) Voltage | 10 VAC (RMS) |
| UPC | 623980055800 |
| UNSPSC | 39121301 |
| Part Number | BC2DA |
| Shipping Weight | 1.03 lbs (0.47 kg) |
| Design | Rugged, low noise, cool running |
| Included | Locknut and mounting bracket |
| Mounting | Nipple locknut mount for box installation |
| Primary Connection | Stripped wire input leads |
| Secondary Connection | Screw terminal / quick fit tab terminal |
| Environment | Indoor use only |
| UL | UL listed #E184371 |
| CSA | CSA certified (209651) |
| Class | Class 2 energy limiting |
| RoHS Compliant | Yes |
| REACH Compliant | Yes |
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The BC2DA takes 120 V RMS at 60 Hz on the primary and supplies 10 V RMS at 1.2 A on the secondary, for a 12 VA rating.
No. It is a Class 2 energy limiting transformer that is inherently limited, so no fuses or circuit breakers are used.
It uses a nipple locknut mount for box installation and comes complete with locknut and mounting bracket.
Yes, it is covered by UL listing #E184371 and is also CSA certified (209651).
Overall dimensions are A 2.33 in (59 mm), B 2.22 in (56 mm), C 1.98 in (50 mm); shipping weight is 1.03 lbs (0.47 kg).
No, the series is specified for indoor use only.
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