SX30ASMT Pressure Sensor: Equivalent & Substitute Parts

Part Overview

The SX30ASMT is a surface-mount absolute pressure sensor manufactured by Honeywell Sensing and Productivity Solutions, designed for board-level applications requiring 30 PSI (206.84 kPa) absolute pressure measurement. The sensor outputs a Wheatstone Bridge signal in the range of 0 mV to 99 mV at 5V supply voltage, with ±0.5% accuracy.

The SX30ASMT is classified as an obsolete product. Identifying equivalent and substitute components is necessary to maintain design continuity, ensure supply chain availability, and support legacy system maintenance or redesign initiatives.

Substiute Parts

SX30ASMT

Honeywell Sensing and Productivity SolutionsIn Stock: 941SX30ASMT Datasheet

Current PartRFQ

NBPLPNN030PAUNV

Honeywell Sensing and Productivity SolutionsIn Stock: 811NBPLPNN030PAUNV Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute components for the SX30ASMT must satisfy the following critical parameters to ensure functional compatibility:

Mandatory Matching Parameters:

• Pressure Type: Absolute
• Operating Pressure: 30 PSI (206.84 kPa)
• Maximum Pressure: 60 PSI (413.69 kPa)
• Output Type: Wheatstone Bridge
• Operating Temperature Range: -40°C ~ 125°C
• Mounting Type: Surface Mount (SMD/SMT)
• RoHS Compliance: Yes
• Manufacturer: Honeywell Sensing and Productivity Solutions

Allowable Variations:

• Output Signal Range: May vary within compatible signal conditioning parameters
• Accuracy: May improve (lower tolerance values acceptable)
• Supply Voltage: May support wider input range
• Package Configuration: May differ in pin count and form factor if termination remains SMD/SMT Tab
• Product Status: Active products preferred for ongoing availability

The NBPLPNN030PAUNV qualifies as a substitute based on matching all mandatory parameters while offering improved specifications in accuracy and supply voltage flexibility.

Parameter Comparison

Engineering Selection Recommendations

For Direct Substitution:

The NBPLPNN030PAUNV is suitable as a substitute for the SX30ASMT in applications where the following conditions are met:

1. Pressure Specification Alignment: Both sensors operate at identical 30 PSI absolute pressure with 60 PSI maximum rating. Functional pressure measurement capability is preserved.

2. Signal Compatibility: The output signal range increases from 0–99 mV to 0–105 mV. Signal conditioning circuits must accommodate this 6 mV increase in full-scale output. Existing analog-to-digital converter (ADC) configurations require verification for signal scaling.

3. Supply Voltage Flexibility: The NBPLPNN030PAUNV accepts 1.8V to 12V supply, compared to the SX30ASMT's fixed 12V requirement. This provides operational flexibility in power-constrained applications.

4. Accuracy Enhancement: The substitute offers ±0.25% accuracy versus ±0.5% for the original part, representing a 50% improvement in measurement precision.

5. Product Status and Availability: The NBPLPNN030PAUNV is classified as Active, ensuring ongoing manufacturing support and supply chain availability. The SX30ASMT's obsolete status necessitates transition planning.

6. Compliance Certification: Both components maintain RoHS compliance and identical moisture sensitivity ratings (MSL 1), supporting regulatory and environmental requirements.

Package Consideration:

The substitute uses a 6-SMD, No Lead, Top Port configuration versus the original 8-SMD Module. PCB layout modifications are required to accommodate the different pin count and physical footprint. Mechanical integration must be validated against available board space and connector routing.

Frequently Asked Questions (FAQ)

Q1: Can the NBPLPNN030PAUNV directly replace the SX30ASMT without circuit modifications?

A: Functional substitution is possible with signal conditioning adjustments. The output signal range difference (99 mV versus 105 mV) requires ADC scaling verification. PCB layout changes are mandatory due to different package configurations (8-SMD versus 6-SMD, No Lead).

Q2: What is the impact of the increased output signal range on existing signal processing circuits?

A: The 6 mV increase in full-scale output (from 99 mV to 105 mV) represents a 6% change in signal amplitude. Analog signal conditioning and ADC input scaling must be recalibrated to maintain measurement accuracy and prevent signal clipping or loss of resolution.

Q3: Are there any supply voltage compatibility issues when substituting the NBPLPNN030PAUNV?

A: No. The substitute's 1.8V to 12V supply range encompasses the original part's 12V requirement. Applications using 12V supply will operate within specification. Lower voltage applications may benefit from the extended supply range.

Q4: Does the improved accuracy of the NBPLPNN030PAUNV (±0.25% versus ±0.5%) require system recalibration?

A: System recalibration is not required for functional operation. The improved accuracy is a performance enhancement. Existing calibration procedures based on ±0.5% tolerance will remain valid. Applications requiring tighter tolerance control may benefit from the enhanced accuracy specification.

Q5: What are the mechanical considerations for PCB integration?

A: The NBPLPNN030PAUNV uses a 6-SMD, No Lead, Top Port package, differing from the SX30ASMT's 8-SMD Module configuration. PCB footprint, solder pad layout, and component placement must be redesigned. The "Top Port" designation indicates a pressure port on the component's upper surface; verify mechanical clearance and pressure line routing compatibility with the application's physical constraints.

Q6: Is the NBPLPNN030PAUNV suitable for legacy system maintenance?

A: Yes. The substitute meets all functional pressure measurement requirements and maintains identical operating temperature range (-40°C to 125°C) and environmental compliance (RoHS, MSL 1). PCB and signal conditioning modifications are required. The Active product status ensures long-term availability for ongoing support.

Q7: What certifications and compliance standards apply to both sensors?

A: Both the SX30ASMT and NBPLPNN030PAUNV are RoHS Compliant and classified under ECCN EAR99 with HTSUS code 9026.20.4000. Moisture Sensitivity Level 1 (Unlimited) indicates no moisture-related handling restrictions during storage or assembly.