ASCX150DN Equivalent & Substitute Parts

Part Overview

The ASCX150DN is a differential pressure sensor manufactured by Honeywell Sensing and Productivity Solutions, rated for 150PSI (1034.21kPa) with dual analog voltage output of 0.25V to 4.75V. This component is packaged as a 6-SIP module with male barbless tube ports (0.19" / 4.8mm) and features amplified, temperature-compensated output suitable for board mount applications.

The ASCX150DN is classified as obsolete. Locating equivalent or substitute components is necessary to support legacy system maintenance, design updates, or when original inventory becomes unavailable. Substitute parts must maintain compatibility with existing pressure measurement requirements, electrical interfaces, and mechanical mounting constraints.

Substiute Parts

ASCX150DN

Honeywell Sensing and Productivity SolutionsIn Stock: 1133ASCX150DN Datasheet

Current PartRFQ

SSCSNBN150PGAA5

Honeywell Sensing and Productivity SolutionsIn Stock: 744SSCSNBN150PGAA5 Datasheet

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SSCSNBN150PGAB5

Honeywell Sensing and Productivity SolutionsIn Stock: 1128SSCSNBN150PGAB5 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the ASCX150DN requires evaluation of the following critical parameters:

Pressure Measurement Compatibility: The substitute must operate at the same 150PSI (1034.21kPa) nominal pressure rating. The ASCX150DN measures differential pressure; substitute parts may operate as vented gauge pressure sensors if the application permits measurement of pressure relative to atmospheric reference.

Electrical Output Compatibility: The ASCX150DN provides 0.25V to 4.75V analog output. Substitute parts with matching or overlapping output ranges maintain signal compatibility with existing signal conditioning and data acquisition circuits.

Supply Voltage Range: The ASCX150DN operates from 4.5V to 16V. Substitute parts with narrower supply voltage ranges (such as 4.75V to 5.25V) require verification that the power supply in the application falls within the substitute's specified range.

Mechanical Interface: The ASCX150DN features dual male barbless tube ports of 0.19" (4.8mm) diameter. Substitute parts must maintain identical port geometry and style to ensure pneumatic compatibility without adapter modification.

Package and Termination: The ASCX150DN uses a 6-SIP module with PC pin termination for through-hole mounting. Substitute parts with different package types (such as 4-SIP) require PCB layout modification.

Accuracy and Temperature Performance: The ASCX150DN specifies ±1% accuracy across -25°C to 105°C. Substitute parts with improved accuracy (±0.25%) and different temperature ranges may provide enhanced performance but require application validation.

Product Status and Compliance: Active substitute parts with current RoHS and REACH compliance support long-term supply chain continuity compared to obsolete original components.

Parameter Comparison

Engineering Selection Recommendations

SSCSNBN150PGAB5 as Primary Substitute:

The SSCSNBN150PGAB5 provides the closest electrical compatibility with the ASCX150DN. Both components share identical output voltage range (0.25V ~ 4.75V), matching signal conditioning requirements in existing circuits. The SSCSNBN150PGAB5 operates at 150PSI nominal pressure and maintains the same dual male barbless tube port configuration (0.19" / 4.8mm).

The SSCSNBN150PGAB5 is classified as active product status with current RoHS compliance, ensuring long-term availability and regulatory support. The substitute offers improved accuracy (±0.25% versus ±1%) and higher maximum pressure rating (250PSI versus 150PSI), providing enhanced performance margins.

The primary limitation is package type: the SSCSNBN150PGAB5 uses 4-SIP configuration versus the ASCX150DN's 6-SIP module. This requires PCB layout modification to accommodate the different pin count and footprint. Supply voltage range narrows to 4.75V ~ 5.25V, requiring verification that the application power supply operates within this specification.

The pressure type differs: SSCSNBN150PGAB5 measures vented gauge pressure relative to atmospheric reference, while ASCX150DN measures differential pressure between two independent ports. Applications requiring true differential pressure measurement must evaluate whether gauge pressure measurement is functionally acceptable.

SSCSNBN150PGAA5 as Secondary Substitute:

The SSCSNBN150PGAA5 shares mechanical compatibility (dual male barbless 0.19" ports, 4-SIP package, through-hole mounting) and electrical characteristics (150PSI operation, analog voltage output, amplified temperature-compensated design) with the ASCX150DN.

The SSCSNBN150PGAA5 output range (0.5V ~ 4.5V) differs from the ASCX150DN (0.25V ~ 4.75V), requiring signal conditioning circuit adjustment to accommodate the narrower output window and different zero/span points. This substitution introduces greater circuit modification complexity compared to SSCSNBN150PGAB5.

The SSCSNBN150PGAA5 is active product status with RoHS compliance and offers ±0.25% accuracy. Operating temperature range (-40°C ~ 85°C) is narrower than ASCX150DN (-25°C ~ 105°C), limiting applicability in high-temperature environments above 85°C.

Pressure Type Consideration:

Both substitute parts operate as vented gauge pressure sensors, measuring pressure relative to atmospheric reference through a vent port. The ASCX150DN measures differential pressure between two independent sealed ports. Applications requiring differential pressure measurement across two separate pressure sources cannot use these substitutes without functional redesign. Applications measuring gauge pressure (pressure above atmospheric) are compatible with both substitute options.

Frequently Asked Questions (FAQ)

Q: Can SSCSNBN150PGAB5 directly replace ASCX150DN without PCB modification?

A: No. The SSCSNBN150PGAB5 uses 4-SIP package configuration while ASCX150DN uses 6-SIP module. Pin count, spacing, and footprint differ, requiring PCB layout redesign. Electrical signal compatibility is maintained (0.25V ~ 4.75V output range matches), but physical mounting requires new through-hole pattern.

Q: What is the functional difference between differential and vented gauge pressure measurement?

A: ASCX150DN (differential) measures pressure difference between two independent sealed ports, suitable for applications such as filter pressure drop or pressure differential across components. SSCSNBN150PGAB5 and SSCSNBN150PGAA5 (vented gauge) measure pressure relative to atmospheric reference through a vent port, suitable for applications such as tank pressure or system pressure monitoring. Applications requiring true differential measurement cannot use gauge pressure substitutes.

Q: Does the narrower supply voltage range of SSCSNBN150PGAB5 (4.75V ~ 5.25V) versus ASCX150DN (4.5V ~ 16V) affect substitution?

A: Yes. The application power supply must operate within 4.75V to 5.25V for SSCSNBN150PGAB5 compatibility. If the original design uses supply voltages below 4.75V or above 5.25V, the substitute cannot be used without power supply modification. Verify the actual operating voltage in the application before substitution.

Q: Why does SSCSNBN150PGAB5 have higher maximum pressure (250PSI) than operating pressure (150PSI)?

A: Maximum pressure (250PSI) represents the overpressure limit the sensor can withstand without damage. Operating pressure (150PSI) is the nominal measurement range. The higher maximum pressure rating provides safety margin and protection against transient pressure spikes, but does not affect normal operation at 150PSI.

Q: Can SSCSNBN150PGAA5 be used if output voltage range mismatch is acceptable?

A: Yes, if the application signal conditioning and data acquisition circuits are redesigned to accommodate the 0.5V ~ 4.5V output range instead of 0.25V ~ 4.75V. This requires recalibration of zero and span points in the measurement system. SSCSNBN150PGAB5 is preferred because it eliminates this signal conditioning modification.

Q: Are both substitute parts RoHS compliant and suitable for regulated applications?

A: Yes. Both SSCSNBN150PGAB5 and SSCSNBN150PGAA5 are RoHS compliant with MSL rating 1 (unlimited moisture sensitivity). Both are active products with current manufacturing support, suitable for applications requiring regulatory compliance and long-term supply chain continuity.

Q: What is the impact of ±0.25% accuracy (substitutes) versus ±1% accuracy (ASCX150DN)?

A: The substitutes provide improved measurement accuracy. At 150PSI, ASCX150DN accuracy is ±1.5PSI while substitutes are ±0.375PSI. This enhanced accuracy is a performance improvement and does not create compatibility issues. Applications designed for ±1% accuracy operate within specification with ±0.25% substitutes.

Q: Do the substitutes maintain temperature compensation across the full operating range?

A: Both substitutes feature temperature compensation across their specified operating ranges (-40°C ~ 85°C). The ASCX150DN operates to 105°C. Applications requiring measurement above 85°C cannot use these substitutes. Verify the maximum operating temperature requirement in the application before substitution.