Hammond 274AX 137 VA 50/60 Hz Plate Transformer, 720V C.T. 138mA
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Create Free Business AccountKey Features
- 137 VA rating; 720V C.T. @ 138mA RMS high voltage (plate) secondary
- 117 VAC primary, 50/60 Hz
- Filament windings: 5V @ 3A and 6.3V C.T. @ 3.5A
- Enclosed, 4 hole, chassis mount in the vertical (X) style, 3.13 in (80 mm) x 3.50 in (89 mm)
- Runs full wave bridge or full wave C.T.
- Class A insulation (105 degrees C), 2,000V RMS hi-pot test, minimum 6 in leads
- CSA certified (209651); RoHS and REACH compliant
- Shipping weight 5.7 lbs (2.59 kg)
The 274AX is a 137 VA high voltage (plate) and filament transformer with a 117 VAC primary rated for 50/60 Hz. It is the only 720V center-tapped part in the series (360-0-360 in the short description), rated at 138 mA, and it adds a 5V @ 3A winding and a center-tapped 6.3V filament winding at 3.5A.
Electrically, the 274AX is rated 137 VA with a 117 VAC, 50/60 Hz primary, a high voltage secondary rated 720V C.T. @ 138mA (RMS), and filament windings of 5V @ 3A (#1) and 6.3V C.T. @ 3.5A (#2). As with every 200 Series unit, it can be run full wave bridge or full wave C.T. Its C dimension of 3.88 in differs slightly from the 3.81 in listed for the other 3.13 in wide parts.
The case is an enclosed, 4 hole, chassis mount design in the vertical (X) mounting style, with minimum 6 in long leads. Listed dimensions are A 3.13 in (80 mm), B 3.50 in (89 mm), C 3.88 in (99 mm), D 2.50 in (64 mm), F 2.38 in (60 mm), with 0.20 in (5 mm) x 0.38 in (10 mm) mounting slots. Shipping weight is 5.7 lbs (2.59 kg).
Its primary is listed at 117 VAC, 50/60 Hz, so it is one of the 200 Series parts suited to both 50 Hz and 60 Hz supplies. Insulation is Class A (105 degrees C), units are hi-pot tested at 2,000V RMS, the design is CSA certified (209651), and the part is RoHS and REACH compliant.
Ideal For
- High voltage (plate) supply using a full wave bridge rectifier
- Full wave center-tapped (C.T.) rectifier plate supply
- 5V filament supply plus 6.3V C.T. filament supply
- Chassis-mounted power supplies on 117 VAC, 50/60 Hz lines
Mounting
| Leads | Minimum 6" long leads |
| Mounting Type | Vertical ("X") |
| Mounting Style | Enclosed, 4 hole, chassis mount |
Overview
| Series | 200 Series - High Voltage (Plate) & Filament - 32 VA to 454 VA |
| Description | Transformer, high voltage, 137VA, primary 117VAC, HV secondary 720V C.T. @ 138ma. |
| Part Number | 274AX |
| Product Type | High voltage (plate) and filament power transformer |
| Short Description | 360-0-360, 5V@3A, 6.3VCT@3.5A |
Dimensions
| Dimension A | 3.13 in (80 mm) |
| Dimension B | 3.50 in (89 mm) |
| Dimension C | 3.88 in (99 mm) |
| Dimension D | 2.50 in (64 mm) |
| Dimension F | 2.38 in (60 mm) |
| Mounting Slot (G) | 0.20 in (5 mm) x 0.38 in (10 mm) |
Electrical
| Filament #1 | 5V @ 3A |
| Filament #2 | 6.3V C.T. @ 3.5A |
| Power Rating | 137 VA |
| Primary Voltage | 117 VAC |
| Primary Frequency | 50/60 Hz |
| Primary Winding Note | Production "running change" made to the primary winding, effective with August 2009 production |
| Rectifier Configuration | Full wave bridge or full wave C.T. |
| AC High Voltage Secondary (RMS) | 720V C.T. @ 138ma. |
Identifiers
| UPC | 623980241838 |
| UNSPSC | 39121301 |
Packaging & Shipping
| Shipping Weight | 5.7 lbs (2.59 kg) |
Construction & Finish
| Enclosure | Enclosed |
| Insulation | Class A insulation (105 degrees C) |
Compliance & Certifications
| Hi-Pot Test | 2,000V RMS |
| RoHS Compliant | Yes |
| REACH Compliant | Yes |
| CSA Certification | CSA certified (209651) |
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Frequently Asked Questions
What voltages does the 274AX provide?▾
The 274AX provides a high voltage secondary rated 720V C.T. @ 138mA (RMS) plus filament windings of 5V @ 3A (#1) and 6.3V C.T. @ 3.5A (#2), from a 117 VAC, 50/60 Hz primary, with a 137 VA rating.
Can the 274AX be used with a full wave bridge rectifier?▾
Yes. 200 Series units can be run full wave bridge or full wave C.T. (center-tapped).
Will the 274AX work on 50 Hz power?▾
Yes. The 274AX primary is listed at 117 VAC, 50/60 Hz.
What certifications and insulation does the 274AX have?▾
The 200 Series design is CSA certified (209651), uses Class A insulation (105 degrees C) and is hi-pot tested at 2,000V RMS. The part is RoHS and REACH compliant.
How is the 274AX mounted and how much does it weigh?▾
It is an enclosed, 4 hole, chassis mount transformer in the vertical (X) mounting style, with dimension A 3.13 in (80 mm) and B 3.50 in (89 mm). Shipping weight is 5.7 lbs (2.59 kg).
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