CS1550BL Current Sensor Equivalent & Substitute Parts

Part Overview

The CS1550BL is an active open-loop current sensor manufactured by CUI Devices, designed for bidirectional AC current measurement applications. This module provides ratiometric voltage output with a 15A sensing range and operates across a frequency spectrum from DC to 55kHz. The part is currently active in production with full RoHS3 compliance and REACH unaffected status. Alternative models within the CSXX50BL series are available for applications requiring different current sensing ranges while maintaining identical electrical and mechanical characteristics across all other parameters.

Substiute Parts

CS1550BL

CUI DevicesIn Stock: 772CS1550BL Datasheet

Current PartRFQ

CS0350BL

CUI DevicesIn Stock: 1030CS0350BL Datasheet

Parametric EquivalentRFQ

CS0550BL

CUI DevicesIn Stock: 843CS0550BL Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts within the CSXX50BL series are qualified for replacement based on identical electrical performance characteristics and mechanical compatibility. The substitution logic is determined by the following parameters that remain constant across all qualified alternatives:

Fixed Parameters (Identical Across All Substitutes):

• 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
• Packaging: Tray
• Product Status: Active
• RoHS Status: ROHS3 Compliant
• REACH Status: REACH Unaffected

Variable Parameter (Differentiates Substitutes):

• Current - Sensing Range: 3A, 5A, or 15A

Substitution is valid when the application current measurement requirement does not exceed the rated sensing range of the alternative part. All substitute parts maintain identical form factor, electrical interface, and performance specifications outside of current sensing capacity.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed are active production components with identical RoHS3 compliance and REACH unaffected status. Selection between CS1550BL, CS0550BL, and CS0350BL is determined solely by the maximum current measurement requirement of the application circuit.

CS1550BL is selected for applications requiring current sensing up to 15A.

CS0550BL is selected for applications requiring current sensing up to 5A.

CS0350BL is selected for applications requiring current sensing up to 3A.

All three parts share identical electrical interface specifications, frequency response characteristics, accuracy parameters, and mechanical mounting requirements. Substitution is valid when the application current does not exceed the rated sensing range of the selected part. No additional design modifications are required when substituting between these parts within the CSXX50BL series.

Frequently Asked Questions (FAQ)

Q: Can CS0550BL replace CS1550BL in an application?

A: CS0550BL can replace CS1550BL only if the maximum current in the application does not exceed 5A. Both parts share identical electrical characteristics, output type, frequency response, and mounting specifications. The only difference is the current sensing range.

Q: Can CS1550BL replace CS0350BL?

A: CS1550BL can replace CS0350BL in any application. The CS1550BL has a higher current sensing range (15A versus 3A) and maintains all other electrical and mechanical specifications identical to CS0350BL. No design changes are required.

Q: Are all three parts pin-compatible?

A: All three parts (CS1550BL, CS0550BL, CS0350BL) are through-hole mounted modules with identical package specifications. Pin compatibility is maintained across the series.

Q: What is the key difference between these substitute parts?

A: The sole differentiating parameter is the current sensing range. CS1550BL senses up to 15A, CS0550BL up to 5A, and CS0350BL up to 3A. All other specifications including output type, frequency response, accuracy, linearity, supply voltage, response time, and operating temperature are identical.

Q: Do these parts require different PCB layouts?

A: No. All three parts use identical through-hole mounting and module packaging. PCB layouts designed for one part accommodate all three substitutes without modification.

Q: Are there any compliance differences between the substitute parts?

A: No. All three parts maintain identical RoHS3 compliance and REACH unaffected status.

Q: What is the maximum frequency response for all substitute parts?

A: All parts in the CSXX50BL series support DC to 55kHz frequency range with 7µs response time.

Q: Can I use a lower-range sensor in a higher-current application?

A: No. Using a sensor with a lower current sensing range than the application requires will result in output saturation and loss of measurement accuracy. The selected part must have a current sensing range equal to or greater than the maximum current in the application.