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Product Detailed Parameters
- Description：CURR SENSE XFMR 125:1 7A SMD
- Series：ECST
- Mfr：Eaton - Electronics Division
- Package：Tape & Reel (TR),Cut Tape (CT)
- Frequency Range：50kHz ~ 1MHz
- Type：Invasive
- Inductance：1.28 mH
- ET (Volt-Time)：-
- Current Ratio：-
- DC Resistance (DCR)：3mOhm Primary, 13Ohm Secondary Max
- Ratings：-
- Mounting Type：Surface Mount
- Size / Dimension：0.189" L x 0.144" W (4.80mm x 3.65mm)
- Height - Seated (Max)：0.140" (3.55mm)
- Termination Style：J Lead
- Turns Ratio - Primary:Secondary：125:01:00
- Current Rating (Amps)：7:00 AM
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Overview
The ECST1V0504-1125-R is a surface-mount current sense transformer manufactured by Eaton Electronics. It features a turns ratio of 1:125 and supports a maximum primary rated current of 7 A. The device operates within a frequency range of 50 kHz to 1 MHz. Key electrical parameters include a primary DC resistance of 3 mOhms, a secondary DC resistance of 13 Ohms, and an inductance of 1280 uH. The component utilizes an EE4.4 SMT package with physical dimensions of 4.8 mm x 3.65 mm x 3.55 mm.
Feature Summary
- Provides precise current sensing through a fixed 1:125 turns ratio
- Engineered for high-frequency operation between 50 kHz and 1 MHz
- Features very low primary DC resistance for minimal signal loss
- Utilizes a compact EE4.4 surface-mount package design
Applications
- High-frequency power supply current monitoring
- Battery management system protection circuits
- Motor drive current sensing applications
Procurement Notes
Verify the specific part number ECST1V0504-1125-R against official Eaton Electronics documentation to confirm the 1:125 ratio and 7A rating. Ensure compatibility with the required operating frequency range of 50 kHz to 1 MHz. Confirm that the EE4.4 footprint matches the target PCB layout. Cross-reference datasheet specifications for primary and secondary resistances to validate circuit performance requirements before procurement.
Selection Notes
Select this component when a compact solution is needed for high-frequency current sensing up to 1 MHz. The 1:125 ratio suits applications requiring significant signal attenuation from a 7A primary source. Consider the low primary resistance for efficiency-critical designs. Verify that the secondary load impedance aligns with the 13 Ohm secondary resistance to maintain accuracy within the specified frequency band.
Part Context
This current sense transformer belongs to Eaton Electronics' board-mount transformer portfolio. It is designed for surface-mount assembly, offering space savings compared to through-hole alternatives. The product line emphasizes low DC resistance and wide selection of turns ratios to accommodate various power electronics architectures requiring isolated or non-isolated current feedback.
FAQ
What is the maximum primary current rating for this transformer?
The maximum primary rated current is 7 A.
Does this component support frequencies above 1 MHz?
No, the specified operating frequency range is 50 kHz to 1 MHz.
What are the DC resistance values for the windings?
The primary DC resistance is 3 mOhms and the secondary DC resistance is 13 Ohms.
