SX150A Pressure Sensor Equivalent & Substitute Parts

Part Overview

The SX150A is a board-mount absolute pressure sensor manufactured by Honeywell Sensing and Productivity Solutions. It is designed to measure pressures up to 100 PSI (689.48 kPa) with a Wheatstone Bridge output of 0 mV to 110 mV at 5V supply. The device is packaged in a 4-SIP Module with through-hole mounting and operates across a temperature range of -40°C to 85°C.

The SX150A is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or maintenance requirements for systems currently utilizing this component.

Substiute Parts

SX150A

Honeywell Sensing and Productivity SolutionsIn Stock: 1130SX150A Datasheet

Current PartRFQ

NSCSSNN150PAUNV

Honeywell Sensing and Productivity SolutionsIn Stock: 961NSCSSNN150PAUNV Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SX150A is evaluated based on the following critical parameters that define functional compatibility:

Pressure Measurement Capability: The substitute part must operate in the absolute pressure measurement category and support the required pressure range for the application.

Output Interface: The substitute must provide a Wheatstone Bridge output to maintain signal conditioning compatibility with existing analog front-end circuits.

Package and Mounting: The substitute must be available in a 4-SIP Module format with through-hole mounting to ensure mechanical and electrical compatibility with existing PCB designs.

Operating Environment: The substitute must support the temperature range of -40°C to 85°C to function within the same environmental constraints.

Supply Voltage Compatibility: The substitute must operate within a supply voltage range that includes or is compatible with the 12V supply used by the main part.

Regulatory Compliance: The substitute must maintain RoHS compliance and equivalent regulatory status.

The NSCSSNN150PAUNV meets these substitution criteria while offering enhanced specifications in certain areas.

Parameter Comparison

Engineering Selection Recommendations

The NSCSSNN150PAUNV is a direct substitute for the obsolete SX150A based on the following engineering criteria:

Package Compatibility: Both parts are housed in 4-SIP Module packages with through-hole mounting, ensuring mechanical fit and PCB integration without redesign.

Functional Equivalence: Both sensors provide Wheatstone Bridge output for absolute pressure measurement and operate across the identical temperature range of -40°C to 85°C.

Supply Voltage: The NSCSSNN150PAUNV accepts a wider supply voltage range (1.5V ~ 12V) compared to the fixed 12V requirement of the SX150A, providing greater design flexibility while maintaining compatibility with existing 12V supplies.

Enhanced Specifications: The NSCSSNN150PAUNV offers improved accuracy (±0.25% versus ±0.5%) and higher pressure ratings (150 PSI operating, 250 PSI maximum versus 100 PSI operating, 200 PSI maximum).

Active Product Status: The NSCSSNN150PAUNV is an active product with current manufacturing support and inventory availability, eliminating obsolescence risk.

Regulatory Compliance: Both parts maintain RoHS compliance and equivalent regulatory status (ECCN EAR99, HTSUS 9026.20.4000).

The NSCSSNN150PAUNV is suitable for direct replacement in applications where the SX150A is currently specified, provided that the higher pressure rating and improved accuracy do not introduce unintended system behavior changes.

Frequently Asked Questions (FAQ)

Q: Can the NSCSSNN150PAUNV directly replace the SX150A without PCB modifications?

A: Yes. Both parts use identical 4-SIP Module packaging with through-hole mounting. No PCB layout changes are required for mechanical and electrical integration.

Q: What is the difference in output voltage between these two sensors?

A: The SX150A outputs 0 mV to 110 mV across its 100 PSI range. The NSCSSNN150PAUNV outputs 0 mV to 94.5 mV across its 150 PSI range. The output sensitivity differs due to the different pressure ranges. Signal conditioning circuits must account for this difference in output scaling.

Q: Is the NSCSSNN150PAUNV compatible with 12V supply systems?

A: Yes. The NSCSSNN150PAUNV operates across a supply voltage range of 1.5V to 12V, which includes the 12V supply used by the SX150A.

Q: Why does the NSCSSNN150PAUNV have a higher maximum pressure rating?

A: The NSCSSNN150PAUNV is rated for 250 PSI maximum pressure compared to the SX150A's 200 PSI maximum. This reflects the sensor's design for higher pressure applications. For systems operating at or below 100 PSI, this higher rating does not affect performance.

Q: What is the accuracy difference between these sensors?

A: The SX150A has an accuracy of ±0.5%, while the NSCSSNN150PAUNV has an accuracy of ±0.25%. The NSCSSNN150PAUNV provides twice the accuracy specification, which may benefit applications requiring tighter measurement tolerances.

Q: Is the NSCSSNN150PAUNV available in the same quantity as the SX150A?

A: Current inventory shows 885 pieces of the NSCSSNN150PAUNV in stock compared to 1049 pieces of the SX150A. Both are available as new original stock.

Q: Are both sensors RoHS compliant?

A: Yes. Both the SX150A and NSCSSNN150PAUNV are RoHS compliant with MSL rating of 1 (Unlimited moisture sensitivity level).