Hammond CT5CF 1000:1 Chassis Mount Small Current Transformer
Ships from and sold by A5 IT
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Create Free Business AccountKey Features
- 1000:1 current ratio: 5 A primary (20 A max) to 5 mA secondary
- High accuracy windings rated 1%
- Chassis mount (channel frame) with 0.19 in (5 mm) mounting hole
- Customer-supplied primary: 1 turn through the open top of the bobbin
- Series rated for 40 - 1,000 Hz operation
- Compact H 1.25 x D 1.10 x W 2.06 in (32 x 28 x 52 mm)
- Leads 6.0" minimum; RoHS and REACH compliant
The CT5CF is a small-current, chassis mount current transformer with a 1000:1 ratio, part of the CT5 series. It is designed for a 5 A primary (maximum 20 A) and delivers a 5 mA secondary current, so it can drive a standard AC ammeter with a 5 mA movement in equipment and control panels.
The customer supplies the primary winding: one turn of the conductor passes through the open top of the transformer bobbin, acting as the primary. The windings are high accuracy, rated 1%. The series is specified for 40 - 1,000 Hz operation, and the part drawing marks the primary as 0-5 A, 20 A max., 50/60 Hz, with a 0-5 mA secondary.
The drawing titles this unit a channel frame current transformer. The series describes two hole chassis mounting, with a 0.19 in (5 mm) mounting hole size (0.187" ±0.015 on the drawing), and overall dimensions are H 1.25 in (32 mm), D 1.10 in (28 mm) and W 2.06 in (52 mm). Leads extend a minimum of 6.0".
Shipping weight is 0.22 lbs (0.10 kg), with the series table listing 2.6 oz. The CT5CF is RoHS and REACH compliant. For board-level designs, the PC board mount CT5PC offers the same 1000:1 ratio.
Ideal For
- Measuring currents up to 5 A (20 A max) with a 5 mA ammeter
- Chassis-mounted current sensing in OEM equipment
- Control panel current monitoring
Mounting
| Mounting | Two hole chassis mount (series) |
| Mounting Hole | 0.19 in (5 mm); .187" +/- 0.015 per drawing |
Overview
| Style | Chassis Mount |
| Series | CT5 Series |
| Product Type | Current transformer, small current, chassis mount |
| Drawing Title | Channel Frame Current TX |
| Short Description | CT |
Dimensions
| Depth (D) | 1.10 in (28 mm) |
| Width (W) | 2.06 in (52 mm) |
| Height (H) | 1.25 in (32 mm) |
| Drawing Dimension A | 2.063" +/- .063" |
| Drawing Dimension B | 1.10" TYP |
| Drawing Dimension C | 1.25" MAX |
| Drawing Dimension D | 1.75" +/- .063" |
Electrical
| Primary Current | 5 A (maximum 20 A) |
| Winding Accuracy | 1% (high accuracy windings) |
| Secondary Current | 5 mA (for standard AC ammeters with 5 mA movements) |
| Primary Rating (Drawing) | 0-5 AMP, 20 AMP MAX., 50/60 Hz |
| Current Ratio (Pri./Sec.) | 1000:1 |
| Secondary Rating (Drawing) | 0-5 mA, 1% ACC. |
| Operating Frequency (Series) | 40 - 1,000 Hz |
Identifiers
| UPC | 623980953106 |
| UNSPSC | 39121301 |
Packaging & Shipping
| Shipping Weight | 0.22 lbs (0.10 kg) |
| Ship Wt. (Series Table) | 2.6 oz |
Construction & Finish
| Leads | 6.0" min. out |
| Primary Winding | Customer supplied (1 turn through open top of transformer bobbin) |
Compliance & Certifications
| RoHS Compliant | Yes |
| REACH Compliant | Yes |
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Frequently Asked Questions
What is the CT5CF's current ratio?▾
1000:1. It is designed for a 5 A primary (maximum 20 A) with a 5 mA secondary current.
Does the CT5CF include a primary winding?▾
No. The customer supplies the primary winding, which is 1 turn through the open top of the transformer bobbin.
How accurate is it?▾
The windings are rated 1% accuracy.
What frequency range does it cover?▾
The CT5 series is specified for 40 - 1,000 Hz operation; the part drawing marks the primary 50/60 Hz.
How is the CT5CF mounted?▾
It is a chassis mount unit with a 0.19 in (5 mm) mounting hole.
What meter does it work with?▾
Standard AC ammeters with 5 mA movements.
