SX30DD4 Equivalent & Substitute Parts Reference

Part Overview

The SX30DD4 is a differential pressure sensor manufactured by Honeywell Sensing and Productivity Solutions, designed for board mount applications requiring 30PSI (206.84kPa) differential pressure measurement. The sensor outputs a Wheatstone Bridge signal in the range of 0 mV to 110 mV at 5V supply voltage with ±0.5% accuracy. This component is classified as obsolete, making identification of functionally equivalent substitute parts essential for ongoing system support, maintenance, and new design implementations where legacy compatibility is required.

Substiute Parts

SX30DD4

Honeywell Sensing and Productivity SolutionsIn Stock: 1123SX30DD4 Datasheet

Current PartRFQ

NSCDRRN030PDUNV

Honeywell Sensing and Productivity SolutionsIn Stock: 1109NSCDRRN030PDUNV Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SX30DD4 is based on strict alignment of the following critical parameters:

Pressure Measurement Capability: The substitute part must support differential pressure measurement at 30PSI (206.84kPa) operating range. The SX30DD4 operates at 30PSI differential; acceptable substitutes must maintain this pressure rating or provide equivalent or higher maximum pressure capability.

Output Signal Type: Both the main part and substitute must utilize Wheatstone Bridge output configuration to ensure signal conditioning compatibility with existing measurement circuits.

Supply Voltage Compatibility: The SX30DD4 requires 12V supply. Substitute parts must accept 12V operation within their specified supply voltage range.

Mounting and Packaging: The SX30DD4 uses Through Hole mounting in a 6-DIP Module package. Substitutes must be compatible with through-hole PCB assembly processes.

Port Configuration: The SX30DD4 features dual male ports with 0.09" (2.28mm) tube connections in a barbless configuration. Port size and connection style are critical for pneumatic interface compatibility.

Environmental and Compliance Requirements: Operating temperature range of -40°C to 85°C and RoHS compliance status must be maintained or exceeded in substitute selections.

The NSCDRRN030PDUNV qualifies as a substitute based on these criteria, with specific trade-offs documented in the parameter comparison table below.

Parameter Comparison

Engineering Selection Recommendations

Substitution Feasibility: The NSCDRRN030PDUNV can function as a substitute for the SX30DD4 in applications where the following conditions are met:

1. Signal Conditioning Adjustment: The output range difference (110 mV versus 207 mV) requires recalibration of measurement signal conditioning circuits. Analog-to-digital converter (ADC) input scaling and software calibration coefficients must be updated to accommodate the higher sensitivity of the NSCDRRN030PDUNV.

2. Pneumatic Interface Modification: The port size reduction from 0.09" (2.28mm) to 0.08" (1.93mm) and the change from barbless to barbed port style necessitate tubing adapter fittings or complete pneumatic line redesign. Verify that adapter components are available and that pressure drop across adapters remains within system tolerance.

3. PCB Layout Redesign: The transition from 6-DIP to 8-DIP package requires PCB footprint modification. The 8-DIP package with dual ports on the same side may impose different spatial constraints on the circuit board layout.

4. Overpressure Protection: The SX30DD4 supports 90PSI maximum pressure, while the NSCDRRN030PDUNV supports ±60PSI maximum pressure. If the application requires protection against pressures exceeding ±60PSI, the NSCDRRN030PDUNV may not provide adequate overpressure margin. Verify system pressure limits before substitution.

5. Obsolescence Status: Both components are classified as obsolete. Inventory availability is limited. Verify current stock levels with authorized distributors before committing to production designs using either component.

6. Compliance Verification: Both parts maintain RoHS compliance and operate within the -40°C to 85°C temperature range. No additional environmental or regulatory modifications are required for substitution.

Frequently Asked Questions (FAQ)

Q: Can the NSCDRRN030PDUNV be used as a direct drop-in replacement for the SX30DD4?

A: No. While both sensors measure differential pressure at 30PSI and use Wheatstone Bridge output, they differ in package size (6-DIP versus 8-DIP), port configuration (0.09" barbless versus 0.08" barbed), and output sensitivity (110 mV versus 207 mV). PCB redesign and signal conditioning adjustment are required.

Q: What is the impact of the output range difference on measurement accuracy?

A: The NSCDRRN030PDUNV provides 207 mV output compared to the SX30DD4's 110 mV output for the same 30PSI pressure range. This higher sensitivity improves resolution in measurement circuits but requires ADC input scaling adjustment. The NSCDRRN030PDUNV also offers ±0.25% accuracy versus the SX30DD4's ±0.5%, providing improved measurement precision.

Q: Are pneumatic adapter fittings available for the port size change?

A: Port size reduction from 0.09" to 0.08" tube connections requires verification of adapter availability from pneumatic component suppliers. Consult with tubing and fitting manufacturers to confirm adapter specifications and pressure ratings before system integration.

Q: What is the supply voltage requirement difference?

A: The SX30DD4 requires 12V supply. The NSCDRRN030PDUNV accepts 1.5V to 12V supply voltage, providing greater flexibility. Both operate correctly at 12V, so existing power supply circuits require no modification.

Q: How does the maximum pressure rating affect system design?

A: The SX30DD4 supports 90PSI maximum pressure; the NSCDRRN030PDUNV supports ±60PSI maximum pressure. If system overpressure conditions exceed ±60PSI, the NSCDRRN030PDUNV may not provide adequate protection. Verify system pressure limits and select the appropriate sensor based on maximum expected pressure conditions.

Q: Are both components still available for purchase?

A: Both the SX30DD4 and NSCDRRN030PDUNV are classified as obsolete. Current inventory availability is limited. Contact authorized Honeywell distributors to confirm stock status and lead times before committing to production orders.

Q: What PCB modifications are required for the package change?

A: The transition from 6-DIP to 8-DIP package requires complete PCB footprint redesign. The 8-DIP package dimensions are 0.524" (13.30mm) with dual ports on the same side. Verify pin assignments and port orientation in the NSCDRRN030PDUNV datasheet before layout modification.