SX15AP1 Pressure Sensor Equivalent & Substitute Parts

Part Overview

The SX15AP1 is a 15 PSI absolute pressure sensor manufactured by Honeywell Sensing and Productivity Solutions. This component features a Wheatstone Bridge output configuration with 0 mV to 110 mV signal range at 5V supply, designed for board mount applications with through-hole mounting. The SX15AP1 is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system support and new design implementations. The substitute part NSCSANN015PAUNV provides equivalent pressure measurement capability with enhanced specifications and active product status.

Substiute Parts

SX15AP1

Honeywell Sensing and Productivity SolutionsIn Stock: 868SX15AP1 Datasheet

Current PartRFQ

NSCSANN015PAUNV

Honeywell Sensing and Productivity SolutionsIn Stock: 1110NSCSANN015PAUNV Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SX15AP1 with NSCSANN015PAUNV is based on the following critical parameters that must align for functional equivalence:

Pressure Measurement Capability: Both sensors measure 15 PSI (103.42 kPa) absolute pressure, establishing the primary functional equivalence.

Output Configuration: Both employ Wheatstone Bridge output topology, ensuring signal conditioning compatibility with existing measurement circuits.

Operating Temperature Range: Both sensors operate across -40°C to 85°C, maintaining thermal performance consistency.

Mounting and Package: Both utilize through-hole mounting with 4-SIP package configuration, supporting direct board-level integration.

Compliance Standards: Both are RoHS Compliant with MSL 1 (Unlimited) moisture sensitivity rating, meeting regulatory and environmental requirements.

Pressure Overpressure Limits: The SX15AP1 maximum pressure of 45 PSI and NSCSANN015PAUNV maximum pressure of 30 PSI establish the operational envelope boundaries.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The SX15AP1 is classified as obsolete, while NSCSANN015PAUNV maintains active product status with Honeywell. For new designs and long-term system support, NSCSANN015PAUNV is the appropriate selection to ensure component availability and manufacturer support continuity.

Compliance and Certification: Both sensors are RoHS Compliant with identical MSL 1 ratings, satisfying regulatory requirements for both legacy system maintenance and new implementations.

Functional Equivalence: Both sensors deliver 15 PSI absolute pressure measurement via Wheatstone Bridge output across the identical -40°C to 85°C operating temperature range. This establishes core functional compatibility for pressure measurement applications.

Circuit Integration Differences: The output voltage range differs between sensors (SX15AP1: 0-110 mV versus NSCSANN015PAUNV: 0-75 mV). Signal conditioning circuits must be recalibrated to accommodate the reduced output span of the substitute part. The NSCSANN015PAUNV supply voltage range (1.5V-12V) provides greater flexibility compared to the SX15AP1 fixed 12V requirement.

Mechanical Interface Considerations: Port dimensions differ significantly (SX15AP1: 1.8" tube versus NSCSANN015PAUNV: 0.19" tube). Pneumatic tubing and connector specifications require modification for physical installation. The NSCSANN015PAUNV side port configuration may require PCB layout adjustment relative to the original SX15AP1 mounting.

Overpressure Protection: The NSCSANN015PAUNV maximum pressure rating of 30 PSI is lower than the SX15AP1 rating of 45 PSI. System designs must verify that actual operating pressures remain below 30 PSI to prevent sensor damage.

Frequently Asked Questions (FAQ)

Q: Can NSCSANN015PAUNV directly replace SX15AP1 without circuit modifications?

A: No. While both sensors measure 15 PSI absolute pressure with Wheatstone Bridge output, the output voltage ranges differ (SX15AP1: 0-110 mV versus NSCSANN015PAUNV: 0-75 mV). Signal conditioning and analog-to-digital conversion circuits must be recalibrated to accommodate the reduced output span. Additionally, port dimensions differ, requiring mechanical interface modification.

Q: What are the critical parameters for determining substitution compatibility?

A: Substitution compatibility is determined by: (1) identical pressure rating (15 PSI absolute), (2) matching output type (Wheatstone Bridge), (3) overlapping operating temperature range (-40°C to 85°C), (4) compatible mounting method (through-hole), and (5) equivalent package configuration (4-SIP). Deviations in any of these parameters require design review.

Q: Why is the NSCSANN015PAUNV maximum pressure rating lower than the SX15AP1?

A: The NSCSANN015PAUNV maximum pressure specification of 30 PSI reflects the design envelope for that sensor variant. The SX15AP1 maximum pressure of 45 PSI is a separate specification. System designs must ensure actual operating pressures remain below 30 PSI when using NSCSANN015PAUNV to prevent overpressure damage.

Q: Does the NSCSANN015PAUNV side port configuration affect PCB layout?

A: Yes. The SX15AP1 uses a standard 4-SIP module configuration, while NSCSANN015PAUNV specifies 4-SIP with side port. This indicates the pressure port location differs relative to the electrical pins. PCB layout and pneumatic tubing routing must be verified against the specific package drawing for each sensor variant.

Q: What is the advantage of NSCSANN015PAUNV over the obsolete SX15AP1?

A: NSCSANN015PAUNV is active production with current manufacturer support, superior accuracy (±0.25% versus ±0.5%), and wider supply voltage range (1.5V-12V versus fixed 12V). These improvements support long-term system reliability and design flexibility, offsetting the requirement for circuit recalibration and mechanical interface modification.

Q: Are both sensors RoHS compliant?

A: Yes. Both SX15AP1 and NSCSANN015PAUNV are RoHS Compliant with MSL 1 (Unlimited) moisture sensitivity rating, meeting regulatory requirements for both legacy system maintenance and new product designs.