Hammond 166M48 48V C.T. 3A 144VA Power Transformer, 50/60 Hz
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Create Free Business AccountKey Features
- 144 VA rating with 48 V center-tapped secondary at 3 A RMS
- 117V 50/60 Hz. single primary
- Open style, channel bracket chassis mount (mounting ref B)
- Overall 3.44 in (87 mm) x 2.98 in (76 mm) x 4.13 in (105 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 166M48 is a low voltage/filament power transformer from the 166 Series, rated 144 VA with a 117V 50/60 Hz. primary and a 48 V center-tapped (C.T.) secondary rated 3 A RMS. It is built for OEM engineers, panel builders and repair technicians who need an open style, channel bracket, chassis mount transformer to derive a low AC voltage inside equipment. The 166M48 is one of the larger 3 A parts in the series: a 48 V center-tapped secondary rated 144 VA on a 117V 50/60 Hz primary, with a mounting reference of B and a 6.2 lb (2.81 kg) shipping weight.
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.
Overall dimensions from the series ordering table are A 3.44 in (87 mm), B 2.98 in (76 mm) and C 4.13 in (105 mm), with hole-to-hole mounting dimensions D 2.75 in (70 mm) and E 2.38 in (60 mm). Mounting dimensions are listed as 0.20 in (5 mm) and 0.38 in (10 mm) (mounting reference B). The shipping weight is 6.2 lbs (2.81 kg).
The 166 Series is UL listed and CSA certified, and the 166M48 is marked RoHS compliant and REACH compliant. Identifiers include UPC 623980024820 and UNSPSC 39121301.
Ideal For
- Low voltage 48 V AC supply from a 117V 50/60 Hz line
- Filament and low voltage transformer applications
- 144 VA chassis-mounted power supplies in OEM equipment
- Circuits that need a center-tapped secondary
Mounting
| Dimension D | 2.75 in (70 mm) |
| Dimension E | 2.38 in (60 mm) |
| Mounting Style | Open style, channel bracket, chassis mount |
| Mounting Reference | B |
| Mounting Dimensions | 0.20 in (5 mm) / 0.38 in (10 mm) |
Overview
| Series | 166 Series - Low Voltage/Filament, Economical Single Primary |
| Description | Power transformer, low voltage, 117V 50/60 Hz., 144VA, 48 C.T., 3A |
| Part Number | 166M48 |
| Product Type | Power transformer, low voltage |
| Short Description | POWER TX 117VAC 48V@3A |
Dimensions
| Overall Dimension A | 3.44 in (87 mm) |
| Overall Dimension B | 2.98 in (76 mm) |
| Overall Dimension C | 4.13 in (105 mm) |
Electrical
| Hi-Pot Test | 2,000V RMS |
| Power Rating | 144 VA |
| Winding Design | Dual bobbin - no electrostatic shield required |
| Primary Voltage | 117V 50/60 Hz. |
| Secondary Current (RMS) | 3 A |
| Secondary Voltage (RMS) | 48 C.T. VAC |
Identifiers
| UPC | 623980024820 |
| UNSPSC | 39121301 |
Packaging & Shipping
| Shipping Weight | 6.2 lbs (2.81 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 |
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Frequently Asked Questions
What are the input and output ratings of the 166M48?▾
The 166M48 has a 117V 50/60 Hz. primary and a 48 V center-tapped secondary (RMS) rated 3 A, for a power rating of 144 VA.
Can the 166M48 run on 50 Hz power?▾
Yes. The 166M48 is specified for a 117V 50/60 Hz primary.
What size is the 166M48?▾
The series ordering table lists overall dimensions A 3.44 in (87 mm), B 2.98 in (76 mm) and C 4.13 in (105 mm), D 2.75 in (70 mm) and E 2.38 in (60 mm), with 0.20 in (5 mm) / 0.38 in (10 mm) mounting dimensions (mounting reference B). Shipping weight is 6.2 lbs (2.81 kg).
How is the 166M48 mounted and wired?▾
It is an open style, channel bracket, chassis mount transformer with leads a minimum of 6 in long.
What safety approvals does the 166M48 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 166M48 is also RoHS and REACH compliant.
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