Hammond 166N12 12.6V C.T. 4A 50.4VA Power Transformer
Ships from and sold by A5 IT
Exclusive pricing and Net-30 terms. Sign in or create a free account.
Create Free Business AccountKey Features
- 50.4 VA rating with 12.6 V center-tapped secondary at 4 A RMS
- 115V 60 Hz. single primary
- Open style, channel bracket, two hole chassis mount (mounting ref C)
- Overall 3.69 in (94 mm) x 2.13 in (54 mm) x 2.31 in (59 mm) (A x B x C)
- Class B (130 °C) insulation; UL listed as a Class A (105 °C) design
- Dual bobbin design - no electrostatic shield required
- Hi-Pot tested at 2,000V RMS; minimum 6 in long leads
- UL listed and CSA certified; RoHS and REACH compliant
The 166N12 is a low voltage/filament power transformer from the 166 Series, rated 50.4 VA with a 115V 60 Hz. primary and a 12.6 V center-tapped (C.T.) secondary rated 4 A RMS. It is built for OEM engineers, panel builders and repair technicians who need an open style, channel bracket, two hole chassis mount transformer to derive a low AC voltage inside equipment. The 166N12 provides 12.6 V C.T. at 4 A, a 50.4 VA rating, from a 115V 60 Hz primary.
Construction follows the 166 Series design: a dual bobbin winding arrangement, so no electrostatic shield is required, and Class B insulation (130 °C) for extra protection, with the design UL listed as Class A (105 °C). Each unit is Hi-Pot tested at 2,000V RMS. Leads are a minimum of 6 in long. The drawing schematic shows black primary leads, green secondary leads and a green/yellow center tap.
Overall dimensions from the series ordering table are A 3.69 in (94 mm), B 2.13 in (54 mm) and C 2.31 in (59 mm), with a D dimension of 3.13 in (80 mm) and 0.19 in (5 mm) mounting holes (mounting reference C). The shipping weight is 2 lbs (0.91 kg). The part drawing gives the mounting hole size as 0.187 in / 4.7 mm width-wise.
The 166 Series is UL listed and CSA certified, and the 166N12 is marked RoHS compliant and REACH compliant. Identifiers include UPC 623980226903 and UNSPSC 39121301. If you need 117/234V or 50/60 Hz operation or dual secondaries, the manufacturer points to its 266 Series instead.
Ideal For
- Low voltage 12.6 V AC supply from a 115V 60 Hz line
- Filament and low voltage transformer applications
- 50.4 VA chassis-mounted power supplies in OEM equipment
- Circuits that need a center-tapped secondary
Mounting
| Mounting Style | Open style, channel bracket, two hole chassis mount |
| Mounting Reference | C |
| Mounting Dimensions | 0.19 in (5 mm) |
| Mounting Hole Size, Width-wise | 0.187 in / 4.7 mm |
| Hole-to-Hole Mounting Dimension D | 3.13 in (80 mm); drawing 3.13 in / 79.5 mm |
Overview
| Series | 166 Series - Low Voltage/Filament, Economical Single Primary |
| Description | Power transformer, low voltage, 115V 60 Hz., 50.4VA, 12.6 C.T., 4A |
| Part Number | 166N12 |
| Product Type | Power transformer, low voltage |
| Short Description | POWER TX 115VAC - 12.6V@4A |
Dimensions
| Overall Dimension A | 3.69 in (94 mm); drawing 3.69 in / 93.7 mm |
| Overall Dimension B | 2.13 in (54 mm); drawing 2.13 in / 54.1 mm |
| Overall Dimension C | 2.31 in (59 mm); drawing 2.31 in / 58.7 mm |
Electrical
| Hi-Pot Test | 2,000V RMS |
| Power Rating | 50.4 VA |
| Winding Design | Dual bobbin - no electrostatic shield required |
| Primary Voltage | 115V 60 Hz. |
| Secondary Current (RMS) | 4 A |
| Secondary Voltage (RMS) | 12.6 C.T. VAC |
Identifiers
| UPC | 623980226903 |
| UNSPSC | 39121301 |
Packaging & Shipping
| Shipping Weight | 2 lbs (0.91 kg) |
Construction & Finish
| Leads | Minimum 6 in long |
| Insulation | Class B (130 °C) |
Compliance & Certifications
| UL | UL listed (as a Class A, 105 °C design) |
| CSA | CSA certified |
| RoHS Compliant | Yes |
| REACH Compliant | Yes |
Purchasing this for your business?
Business account holders get access to exclusive pricing, volume discounts, and dedicated support. Create a free account to get started.
Frequently Asked Questions
What are the input and output ratings of the 166N12?▾
The 166N12 has a 115V 60 Hz. primary and a 12.6 V center-tapped secondary (RMS) rated 4 A, for a power rating of 50.4 VA.
Can the 166N12 run on 50 Hz power?▾
The 166N12 is specified for a 115V 60 Hz primary. For 117/234V or 50/60 Hz operation, the manufacturer recommends its 266 Series.
What size is the 166N12?▾
The series ordering table lists overall dimensions A 3.69 in (94 mm), B 2.13 in (54 mm) and C 2.31 in (59 mm), D 3.13 in (80 mm), with 0.19 in (5 mm) mounting dimensions (mounting reference C). Shipping weight is 2 lbs (0.91 kg).
How is the 166N12 mounted and wired?▾
It is an open style, channel bracket, two hole chassis mount transformer with leads a minimum of 6 in long; the drawing shows black primary leads, green secondary leads and a green/yellow center tap.
What safety approvals does the 166N12 have?▾
The 166 Series is UL listed (as a Class A, 105 °C design, while using Class B 130 °C insulation) and CSA certified, and is Hi-Pot tested at 2,000V RMS. The 166N12 is also RoHS and REACH compliant.
Related Products
Save 52%166N10 — Power transformer, low voltage, 115V 60 Hz., 40VA, 10 C.T., 4A
Hammond Manufacturing · 166N10
Save 52%166N12B — Power transformer, low voltage, 117V 50/60 Hz., 48VA, 12 C.T., 4A
Hammond Manufacturing · 166N12B
Save 52%166MS — Power transformer, low voltage, 115V 60 Hz., 15VA, 5 C.T., 3A
Hammond Manufacturing · 166MS
Save 52%166N18 — Power transformer, low voltage, 115V 60 Hz., 72VA, 18 C.T., 4A
Hammond Manufacturing · 166N18
Save 52%166M8 — Power transformer, low voltage, 115V 60 Hz., 25.5VA, 8.5 C.T., 3A
Hammond Manufacturing · 166M8