SD2420-002 Equivalent & Substitute Parts Reference

Part Overview

The SD2420-002 is a photodiode optical sensor manufactured by Honeywell Sensing and Productivity Solutions, designed for through-hole mounting applications. This component features a 50 nanosecond response time and 48-degree viewing angle, operating across the temperature range of -55°C to 125°C. The product is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing system support and new design implementations.

Substiute Parts

SD2420-002

Honeywell Sensing and Productivity SolutionsIn Stock: 1143SD2420-002 Datasheet

Current PartRFQ

OP900SL

TT Electronics/Optek TechnologyIn Stock: 1071OP900SL Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the SD2420-002 is evaluated based on electrical performance parameters and environmental operating conditions. The critical parameters determining substitutability are:

Electrical Compatibility:

• Maximum reverse voltage (50V) must be met or exceeded
• Response time characteristics must support the intended application frequency
• Dark current specifications must remain within acceptable system noise margins

Environmental Compatibility:

• Operating temperature range must encompass or exceed -55°C to 125°C
• Moisture sensitivity classification must be compatible with storage and handling protocols

Mechanical Compatibility:

• Mounting configuration must be compatible with through-hole PCB design
• Package form factor must fit existing mechanical constraints

Regulatory Compliance:

• RoHS compliance status must satisfy procurement requirements
• ECCN and HTSUS classifications must align with supply chain regulations

The OP900SL from TT Electronics/Optek Technology meets the established electrical and environmental parameters for substitution consideration.

Parameter Comparison

Engineering Selection Recommendations

For SD2420-002 Replacement:

The OP900SL is suitable as a substitute where the following conditions are satisfied:

1. Timing Requirements: Applications tolerating 100 nanosecond response time (versus 50 nanosecond original specification) are compatible with OP900SL.

2. Optical Field of View: System designs requiring 48-degree viewing angle must be re-evaluated for OP900SL's 36-degree specification. Narrower viewing angle may require optical design modifications.

3. Leakage Current: Systems with noise budgets accommodating 10 nanoampere dark current (versus 5 nanoampere original) are compatible.

4. Temperature Performance: OP900SL's extended lower temperature rating (-65°C versus -55°C) provides additional environmental margin.

5. Regulatory Status: Both components carry equivalent ECCN/EAR99 classification and current RoHS compliance certifications, supporting supply chain continuity.

6. Mechanical Integration: Verification of OP900SL's "User Defined" mounting configuration against existing through-hole PCB footprints is required prior to implementation.

Frequently Asked Questions (FAQ)

Q: Can OP900SL directly replace SD2420-002 in existing designs?

A: Direct replacement requires verification of three parameters: (1) response time tolerance of 100ns versus 50ns, (2) viewing angle compatibility with 36° versus 48°, and (3) mechanical mounting configuration compatibility. Electrical specifications (voltage, temperature range, dark current) are compatible.

Q: What is the primary difference between these photodiodes?

A: The OP900SL has slower response time (100ns vs 50ns), narrower viewing angle (36° vs 48°), and higher dark current (10nA vs 5nA). The OP900SL includes wavelength specification (850nm) and extended spectral range (600nm-1100nm), which the SD2420-002 does not document.

Q: Are there compliance concerns with substitution?

A: Both components are RoHS compliant and carry identical ECCN/EAR99 export classifications. OP900SL meets ROHS3 (current standard) while SD2420-002 meets RoHS (earlier standard). No compliance barriers exist for substitution.

Q: What mounting considerations apply to OP900SL?

A: SD2420-002 specifies through-hole mounting. OP900SL lists "User Defined" mounting, requiring physical verification that the component footprint and lead configuration are compatible with existing through-hole PCB designs.

Q: How does the 36-degree viewing angle of OP900SL compare to the 48-degree angle of SD2420-002?

A: The narrower 36-degree viewing angle of OP900SL reduces the optical acceptance cone. Applications requiring the full 48-degree field of view must evaluate whether optical system performance is affected by this reduction.

Q: Is OP900SL available in equivalent packaging?

A: SD2420-002 packaging is not specified in available documentation. OP900SL is supplied in bulk packaging. Packaging compatibility must be confirmed against procurement and assembly requirements.