Hammond 166S5 5V CT 10A Open Style Power Transformer, 50 VA
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Create Free Business AccountKey Features
- 50 VA rating with 5 V C.T. secondary at 10 A (RMS)
- Single primary rated 115V 60 Hz.
- Open style, channel bracket, two hole chassis mount on 3.13 in (80 mm) centres
- 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, CSA certified, RoHS and REACH compliant
- Overall size A 3.69 x B 2.13 x C 2.31 in; ships at 2 lbs (0.91 kg)
The 166S5 is a 50 VA open style chassis mount power transformer with a single 115 V, 60 Hz primary and a 5 V centre-tapped secondary rated for 10 A. It is aimed at designers and technicians who need a compact, low-voltage, high-current winding for filament, logic-supply or general low-voltage duties.
Construction follows the 166 Series design: an open style unit on a channel bracket, a dual bobbin winding arrangement that needs no electrostatic shield, and Class B insulation rated to 130 °C for extra protection, while the transformer is UL listed as a Class A (105 °C) design. Every unit is hi-pot tested at 2,000V RMS, and it is supplied with minimum 6 in long leads. Compared with lower-rated 5 V C.T. parts in the series, the 166S5 delivers 10 A from a frame only 2.13 in (54 mm) in its B dimension.
Overall dimensions are A 3.69 in (94 mm), B 2.13 in (54 mm) and C 2.31 in (59 mm). The 166S5 mounts with two holes of 0.187 in (4.7 mm) spaced 3.13 in (80 mm) hole to hole (mounting reference C). Shipping weight is 2 lbs (0.91 kg). On the drawing schematic the primary leads are black (BLK/BLK) and the secondary leads are green (GRN/GRN) with a green/yellow (GRN/YEL) centre tap.
The transformer is UL listed and CSA certified, and it is declared RoHS and REACH compliant. Check the 115 V, 60 Hz primary against your supply before ordering; for 117/234 V or 50/60 Hz operation across the range, or dual secondaries, the manufacturer points to its 266 Series.
Ideal For
- Filament and heater supplies
- Low voltage 5 V C.T. AC supply rails
- Rectified low-voltage DC power supplies
- OEM chassis-mounted equipment power
Mounting
| Mounting Style | Two hole chassis mount, channel bracket |
| Mounting Reference | C |
| Mounting Hole Size (Width-wise) | 0.187 in / 4.7 mm (table: 0.19 in (5 mm)) |
| Hole-to-Hole Mounting Dimension D | 3.13 in (80 mm); drawing 3.13 in / 79.5 mm |
Overview
| Style | Open style, channel bracket, chassis mount |
| Series | 166 Series - Economical Single Primary |
| Product Type | Power Transformer - Low Voltage/Filament |
| Short Description | POWER TX 115VAC - 5V@10A |
| Manufacturer Description | Power transformer, low voltage, 115V 60 Hz., 50VA, 5 C.T., 10A |
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 VA |
| Primary Type | Single primary |
| Primary Voltage | 115V 60 Hz. |
| Winding Construction | Dual bobbin design - no electrostatic shield required |
| Secondary Current (RMS) | 10 A |
| Secondary Voltage (RMS) | 5 VAC C.T. (center tapped) |
Identifiers
| UPC | 623980215112 |
| UNSPSC | 39121301 |
| Part Number | 166S5 |
Packaging & Shipping
| Shipping Weight | 2 lbs (0.91 kg) |
Construction & Finish
| Leads | Minimum 6 in long |
| Insulation Class | Class B (130 °C); UL listed as a Class A (105 °C) design |
Compliance & Certifications
| UL | UL listed |
| CSA | CSA certified |
| RoHS Compliant | Yes |
| REACH Compliant | Yes |
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Frequently Asked Questions
What output does the 166S5 provide?▾
The 166S5 has a 5 V centre-tapped (C.T.) RMS secondary rated at 10 A, for a power rating of 50 VA.
What primary voltage does the 166S5 need?▾
Its single primary is rated 115V 60 Hz. The manufacturer's 266 Series is suggested where 117/234 V operation or dual secondaries are needed.
How is the 166S5 mounted?▾
It is an open style, channel bracket unit with a two hole chassis mount. The holes are 0.187 in (4.7 mm) and are spaced 3.13 in (80 mm) hole to hole.
What are the overall dimensions of the 166S5?▾
Overall dimension A is 3.69 in (94 mm), B is 2.13 in (54 mm) and C is 2.31 in (59 mm). The shipping weight is 2 lbs (0.91 kg).
Which certifications does it carry?▾
It is UL listed (as a Class A, 105 °C design using Class B, 130 °C insulation) and CSA certified, and it is RoHS and REACH compliant.
Does it need an electrostatic shield?▾
No. The dual bobbin design means no electrostatic shield is required. Units are hi-pot tested at 2,000V RMS.
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