CS0550BL Current Sensor Equivalent & Substitute Parts

Part Overview

The CS0550BL is an active current sensor manufactured by CUI Devices designed for open-loop bidirectional current measurement applications. This module provides ratiometric voltage output for AC current sensing up to 5A across a frequency range of DC to 55kHz. The part is currently in active production status with 774 units available in inventory.

Substitute parts are identified when design requirements permit operation at reduced current sensing ranges while maintaining compatibility with the electrical interface, mechanical mounting, and operational environment of the primary application.

Substiute Parts

CS0550BL

CUI DevicesIn Stock: 843CS0550BL Datasheet

Current PartRFQ

CS0350BL

CUI DevicesIn Stock: 1030CS0350BL Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CS0550BL is determined by the following critical parameters that must remain constant across equivalent parts:

Fixed Parameters (Must Match):

• Sensor Type: Open Loop
• Number of Channels: 1
• Output Type: Ratiometric, Voltage
• Frequency Range: DC ~ 55kHz
• Linearity: ±0.5%
• Accuracy: ±4.9%
• Voltage - Supply: ±4.75V ~ 5.25V
• Response Time: 7µs
• Current - Supply (Max): 25mA
• Operating Temperature: -10°C ~ 70°C
• Polarization: Bidirectional
• Mounting Type: Through Hole
• Package / Case: Module
• Series: CSXX50BL

Variable Parameter (Allows Substitution):

• Current - Sensing: 5A (primary) → 3A (substitute)

The CS0350BL operates within the same electrical interface specifications and mechanical form factor as the CS0550BL. The reduced current sensing range of 3A permits this part to function as a substitute in applications where the maximum measurable current does not exceed 3A.

Parameter Comparison

Engineering Selection Recommendations

Both the CS0550BL and CS0350BL are active production parts manufactured by CUI Devices and maintain full compliance with ROHS3 and REACH regulatory requirements. Both parts are available in new original condition with established inventory levels.

Selection between these parts is determined by the maximum current measurement requirement of the application:

CS0550BL Selection Criteria: Applications requiring current sensing capability up to 5A with open-loop bidirectional measurement across the DC to 55kHz frequency range.

CS0350BL Selection Criteria: Applications where the maximum measurable current does not exceed 3A. This part provides identical electrical interface characteristics, mechanical mounting compatibility, and regulatory compliance as the CS0550BL within its reduced current range.

Both parts share identical output characteristics, supply voltage requirements, response time, and operating temperature specifications. The substitution is valid only when application current demands remain within the 3A maximum of the CS0350BL.

Frequently Asked Questions (FAQ)

Q: Can the CS0350BL replace the CS0550BL in any application?

A: The CS0350BL can replace the CS0550BL only in applications where the maximum current to be measured does not exceed 3A. The electrical interface, output characteristics, and mechanical mounting are identical. If the application requires measurement of currents above 3A, the CS0550BL must be used.

Q: Are the output voltage ranges identical between these two parts?

A: Yes. Both the CS0550BL and CS0350BL provide ratiometric voltage output with identical linearity (±0.5%), accuracy (±4.9%), and supply voltage specifications (±4.75V ~ 5.25V). The difference is in the current range over which this output is generated.

Q: Do these parts have the same mounting footprint?

A: Yes. Both parts use through-hole mounting in a module package case and are members of the same CSXX50BL series. They are mechanically interchangeable from a PCB layout perspective.

Q: What is the frequency response capability of both parts?

A: Both the CS0550BL and CS0350BL operate across the same frequency range of DC to 55kHz with identical 7µs response time specifications.

Q: Are there any regulatory or compliance differences between these parts?

A: No. Both parts are ROHS3 compliant and REACH unaffected. They carry identical regulatory status and certifications.

Q: What is the supply current requirement for both sensors?

A: Both parts draw a maximum of 25mA supply current and operate with supply voltage specifications of ±4.75V ~ 5.25V.

Q: Can the CS0550BL be used as a substitute for the CS0350BL?

A: Yes. The CS0550BL can be used in any application designed for the CS0350BL since it provides a superset of the current sensing capability (5A versus 3A). However, this substitution may not be necessary if the application current requirements do not exceed 3A.