SX15A Pressure Sensor Equivalent & Substitute Parts

Part Overview

The SX15A is a 15 PSI absolute pressure sensor manufactured by Honeywell Sensing and Productivity Solutions. It features a Wheatstone Bridge output with 0 mV to 110 mV signal range, 12V supply voltage, and ±0.5% accuracy. The device is packaged in a 4-SIP Module with through-hole mounting for board-level applications.

The SX15A 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 utilizing this sensor.

Substiute Parts

SX15A

Honeywell Sensing and Productivity SolutionsIn Stock: 875SX15A Datasheet

Current PartRFQ

NSCSSNN015PAUNV

Honeywell Sensing and Productivity SolutionsIn Stock: 1192NSCSSNN015PAUNV Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SX15A is evaluated based on the following critical parameters that determine functional compatibility:

Primary Matching Criteria:

• Pressure rating: 15 PSI (103.42 kPa) absolute
• Output type: Wheatstone Bridge
• Package format: 4-SIP Module
• Mounting method: Through Hole
• Operating temperature range: -40°C ~ 85°C
• Supply voltage compatibility: 12V operation supported

Secondary Compatibility Factors:

• Output signal range tolerance
• Accuracy specification
• Maximum pressure rating
• Regulatory compliance (RoHS, REACH)

The NSCSSNN015PAUNV qualifies as a direct substitute based on matching pressure rating, output type, package format, mounting method, and temperature range. Both devices operate within the same thermal envelope and share identical 4-SIP through-hole architecture.

Parameter Comparison

Engineering Selection Recommendations

NSCSSNN015PAUNV as Direct Substitute:

The NSCSSNN015PAUNV is an active production part from Honeywell's TruStability® NSC series and serves as the direct replacement for the obsolete SX15A. Both devices share identical pressure ratings, output topology, package format, and thermal operating range.

Key Advantages of NSCSSNN015PAUNV:

• Active product status ensures ongoing availability and supply chain support
• Improved accuracy specification (±0.25% versus ±0.5%)
• Extended supply voltage range (1.5V ~ 12V) provides greater design flexibility
• RoHS and REACH compliance maintained
• Identical 4-SIP through-hole package enables direct PCB compatibility

Design Considerations:

The NSCSSNN015PAUNV output signal range (0 mV ~ 75 mV) differs from the SX15A (0 mV ~ 110 mV). Applications utilizing the full 110 mV output span require signal conditioning adjustment or firmware recalibration to accommodate the reduced 75 mV output range. The lower maximum pressure rating (30 PSI versus 45 PSI) is acceptable for systems operating at or below 15 PSI nominal pressure.

The substitute part's lower supply voltage minimum (1.5V) and improved accuracy make it suitable for power-constrained and precision-critical applications.

Frequently Asked Questions (FAQ)

Q: Can the NSCSSNN015PAUNV directly replace the SX15A without PCB modifications?

A: Yes, the NSCSSNN015PAUNV uses the same 4-SIP through-hole package and pin configuration as the SX15A. No PCB layout changes are required. However, signal conditioning circuits may require adjustment due to the different output voltage range.

Q: What is the impact of the different output signal ranges (110 mV versus 75 mV)?

A: The SX15A produces 0 mV to 110 mV output, while the NSCSSNN015PAUNV produces 0 mV to 75 mV. If your analog-to-digital converter or signal processing circuit is calibrated for the full 110 mV range, you must recalibrate for the 75 mV range to maintain measurement accuracy. The pressure-to-voltage relationship remains linear in both cases.

Q: Is the NSCSSNN015PAUNV compatible with 12V supply systems?

A: Yes. The NSCSSNN015PAUNV operates across 1.5V to 12V supply range, which includes the 12V supply used by SX15A systems. No power supply modifications are necessary.

Q: Why is the maximum pressure rating lower on the substitute part?

A: The NSCSSNN015PAUNV has a 30 PSI maximum rating compared to the SX15A's 45 PSI. For applications operating at the nominal 15 PSI pressure, this difference is not functionally limiting. The substitute part maintains full accuracy and reliability at the specified 15 PSI operating point.

Q: Are there any compliance or certification differences?

A: Both parts are RoHS Compliant with MSL 1 (Unlimited) moisture sensitivity rating. Regulatory compliance is equivalent between the two devices.

Q: What is the accuracy improvement of the substitute part?

A: The NSCSSNN015PAUNV provides ±0.25% accuracy compared to the SX15A's ±0.5%. This represents a 2:1 improvement in measurement precision, beneficial for applications requiring tighter sensor tolerance.