Honeywell 55SS16 Magnetic Sensor - Equivalent & Substitute Parts

Part Overview

The Honeywell 55SS16 is a unipolar magnetic switch sensor designed for current-on applications with a 10µA output specification. This component features a south pole magnet actuator and quick connect termination with a 0.093" (2.3mm) threaded boss configuration. The 55SS16 operates across a supply voltage range of 4.5V to 9V and maintains functionality from -40°C to 100°C.

The 55SS16 is classified as an obsolete product. Identifying equivalent substitute parts is necessary for ongoing system maintenance, design updates, and procurement continuity when original inventory becomes unavailable.

Substiute Parts

55SS16

Honeywell Sensing and Productivity SolutionsIn Stock: 91455SS16 Datasheet

Current PartRFQ

SS449R

Honeywell Sensing and Productivity SolutionsIn Stock: 3596SS449R Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 55SS16 magnetic sensor is evaluated based on the following critical parameters:

Functional Compatibility Criteria:

• Sensor type classification (unipolar switch)
• Actuator polarity (south pole magnet)
• Output signal type and current characteristics
• Supply voltage operating range
• Temperature operating range
• Manufacturer compliance certifications (RoHS, REACH, ECCN)

Mechanical Compatibility Criteria:

• Termination style and connector type
• Package form factor and mounting configuration
• Physical dimensions and threaded boss specifications

The SS449R is identified as a substitute part for the 55SS16. Both components are manufactured by Honeywell Sensing and Productivity Solutions and share the unipolar switch classification with south pole polarization. However, the SS449R operates with different output characteristics (open collector versus current on), expanded supply voltage range (3V ~ 24V versus 4.5V ~ 9V), and extended temperature range (-40°C ~ 150°C versus -40°C ~ 100°C). The SS449R uses Hall Effect technology with through-hole TO-92-3 packaging, representing a different mechanical interface from the 55SS16's quick connect threaded boss configuration.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The 55SS16 is classified as obsolete, while the SS449R maintains active product status with current manufacturing and distribution support. Selection of an active product ensures long-term availability and supply chain continuity.

Compliance and Certification: Both the 55SS16 and SS449R are RoHS Compliant and carry ECCN classification EAR99. Both components are REACH Unaffected with Moisture Sensitivity Level 1 (Unlimited). Compliance profiles are equivalent between the two parts.

Functional Differences: The SS449R operates with open collector output technology, whereas the 55SS16 specifies current-on output at 10µA. The SS449R provides expanded supply voltage tolerance (3V ~ 24V) and extended operating temperature range (-40°C ~ 150°C) compared to the 55SS16 specifications (4.5V ~ 9V, -40°C ~ 100°C).

Mechanical Interface: The 55SS16 uses quick connect termination with a 0.093" threaded boss, while the SS449R employs through-hole TO-92-3 packaging. These represent distinct mechanical interfaces requiring circuit board redesign or adapter solutions for direct substitution.

Frequently Asked Questions (FAQ)

Q: Can the SS449R directly replace the 55SS16 in existing applications?

A: Direct replacement requires evaluation of three factors: output signal compatibility (open collector versus current-on), supply voltage availability in the target circuit (SS449R requires 3V minimum, 55SS16 requires 4.5V minimum), and mechanical interface compatibility (SS449R uses TO-92-3 through-hole mounting versus 55SS16 quick connect threaded boss). Circuit redesign or adapter hardware may be necessary.

Q: What are the key functional differences between these parts?

A: Both components are unipolar magnetic switches with south pole polarization manufactured by Honeywell. The primary functional difference is output type: the 55SS16 provides current-on output at 10µA, while the SS449R uses open collector output with 20mA maximum current capability. The SS449R incorporates Hall Effect sensing technology and provides wider operating ranges for both supply voltage and temperature.

Q: Are both parts RoHS compliant?

A: Yes. Both the 55SS16 and SS449R are RoHS Compliant with identical REACH and ECCN classifications (EAR99). Moisture Sensitivity Level is 1 (Unlimited) for both components.

Q: What is the operating temperature difference?

A: The 55SS16 operates from -40°C to 100°C. The SS449R extends this range to -40°C to 150°C, providing 50°C additional high-temperature capability.

Q: Does the SS449R support the same supply voltage as the 55SS16?

A: The 55SS16 requires 4.5V to 9V supply. The SS449R accepts 3V to 24V supply, providing broader voltage compatibility. Circuits designed for 55SS16 operation within the 4.5V to 9V range will function with SS449R, but the SS449R enables operation at lower voltages (3V to 4.5V) and higher voltages (9V to 24V) not supported by the original part.

Q: What packaging differences exist between these sensors?

A: The 55SS16 uses quick connect termination with a 0.093" (2.3mm) threaded boss configuration for panel or bracket mounting. The SS449R uses TO-92-3 through-hole packaging for printed circuit board insertion. These represent fundamentally different mechanical interfaces.