Panasonic PM-F24 Optical Sensor: Equivalent & Substitute Parts

Part Overview

The Panasonic PM-F24 is an optical through-beam sensor module with NPN output configuration, selectable for Dark-ON or Light-ON operation. This component features a 0.197" (5mm) sensing distance and is designed for slot-type mounting applications with wire leads. The PM-F24 is classified as obsolete, making identification of compatible substitute parts essential for system maintenance, repair, and redesign applications where continued component availability is required.

Substiute Parts

PM-F24

Panasonic Industrial Automation SalesIn Stock: 1001PM-F24 Datasheet

Current PartRFQ

PM-F25

Panasonic Industrial Automation SalesIn Stock: 1772PM-F25 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the PM-F24 is determined by the following critical parameters that must remain compatible:

Mandatory Compatibility Parameters:

• Sensing method: Through-Beam
• Output type: NPN configuration
• Mounting type: Chassis Mount
• Package format: Module with Wire Leads
• Response time: 20µs (matching performance requirement)
• Operating temperature range: -25°C ~ 55°C (minimum coverage)
• Collector current capability: ≥15 mA (minimum requirement)

Allowable Variation Parameters:

• Sensing distance: May increase from 0.197" (5mm) to 0.236" (6mm) for applications where greater detection range is acceptable
• Output selectability: Transition from selectable Dark-ON/Light-ON to fixed NPN Open Collector configuration is acceptable if application logic accommodates fixed output state
• Supply voltage: PM-F24 operates on collector-emitter voltage; PM-F25 operates on 5V ~ 24V supply voltage (requires circuit redesign consideration)

The PM-F25 qualifies as a substitute based on maintained through-beam sensing method, NPN output, chassis mount configuration, matching response time, and compatible operating temperature range.

Parameter Comparison

Engineering Selection Recommendations

PM-F25 as Primary Substitute:

The PM-F25 is the designated substitute for the obsolete PM-F24 based on functional equivalence in through-beam sensing architecture and NPN output topology. Both components maintain identical response time (20µs) and operating temperature range (-25°C ~ 55°C), ensuring temporal and thermal performance parity.

Product Status Consideration:

The PM-F24 is classified as obsolete with 893 units in current inventory. The PM-F25 maintains active product status with 1667 units available, establishing long-term supply continuity for new designs and ongoing system support.

Compliance and Certification:

Both components satisfy RoHS requirements. The PM-F25 carries ROHS3 certification, representing current regulatory compliance standards. Moisture sensitivity level remains unchanged at MSL 1 (Unlimited) for both variants, indicating equivalent handling and storage requirements.

Circuit Integration Factors:

The PM-F24 operates on collector-emitter voltage principles with selectable output logic. The PM-F25 operates on a 5V ~ 24V supply voltage with fixed NPN Open Collector output. System redesign is required to accommodate the PM-F25, including power supply modification and output signal conditioning if the original design relied on Dark-ON/Light-ON selectability.

Sensing Distance Variation:

The PM-F25 extends sensing distance to 0.236" (6mm) compared to the PM-F24's 0.197" (5mm). This increase is acceptable for applications where greater detection range does not compromise slot-type mounting geometry or optical alignment requirements.

Frequently Asked Questions (FAQ)

Q: Can the PM-F25 directly replace the PM-F24 without circuit modification?

A: Direct pin-for-pin replacement is not possible. The PM-F24 uses collector-emitter voltage operation, while the PM-F25 requires a 5V ~ 24V supply voltage. Circuit redesign is necessary to accommodate the PM-F25's power supply requirements and fixed NPN Open Collector output configuration.

Q: What is the impact of the increased sensing distance in the PM-F25?

A: The PM-F25 sensing distance increases from 0.197" (5mm) to 0.236" (6mm). This extended range is acceptable for applications where slot-type mounting geometry and optical alignment can accommodate the larger detection window. Applications with tight spatial constraints must evaluate mechanical feasibility.

Q: Are the response times equivalent between PM-F24 and PM-F25?

A: Yes. Both components maintain identical response time specifications of 20µs, ensuring equivalent temporal performance for time-critical sensing applications.

Q: What are the differences in output configuration between these parts?

A: The PM-F24 provides selectable Dark-ON/Light-ON output logic, allowing configuration flexibility. The PM-F25 provides fixed NPN Open Collector output. Applications requiring output selectability must implement external logic conditioning or select alternative components.

Q: Are both components suitable for the same operating temperature range?

A: Yes. Both the PM-F24 and PM-F25 operate across -25°C ~ 55°C, providing equivalent thermal performance for industrial environments within this range.

Q: What is the significance of the product status difference?

A: The PM-F24 is obsolete with limited remaining inventory (893 units). The PM-F25 is active with greater availability (1667 units), ensuring supply continuity for new designs and long-term system support.

Q: Do both components have identical moisture sensitivity requirements?

A: Yes. Both components carry MSL 1 (Unlimited) classification, indicating identical handling, storage, and moisture exposure tolerances.

Q: What compliance certifications apply to each component?

A: The PM-F24 is RoHS Compliant. The PM-F25 is ROHS3 Compliant, representing current regulatory standards. Both components satisfy environmental compliance requirements for their respective product lifecycles.