PS9851-1-F3-AX Equivalent & Substitute Parts

Part Overview

The PS9851-1-F3-AX is a logic output optoisolator from the NEPOC series, rated for 2500Vrms isolation voltage with push-pull totem pole output configuration. This component features a single isolated channel with 15Mbps data rate capability and 10kV/µs common mode transient immunity. The original manufacturer part (CEL) has been discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives from active product lines to maintain design continuity and procurement viability.

Substiute Parts

PS9851-1-F3-AX

CELIn Stock: 2420PS9851-1-F3-AX Datasheet

Current PartRFQ

PS9851-1-F3-AX

Renesas Electronics CorporationIn Stock: 2511PS9851-1-F3-AX Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The PS9851-1-F3-AX from Renesas Electronics Corporation (formerly CEL) serves as the direct functional equivalent. Substitution is valid based on the following criteria:

Critical Parameters for Substitution:

• Isolation voltage: 2500Vrms (matches exactly)
• Single channel configuration (1/0 input-output)
• Output topology: Push-Pull, Totem Pole (identical)
• Data rate specification: 15Mbps (matches exactly)
• Common mode transient immunity: 10kV/µs minimum (matches exactly)
• Package type: 8-SSOP (Surface Mount Small Outline)
• Electrical characteristics: Propagation delay, rise/fall time, supply voltage, and temperature range remain within original specifications

This alternative maintains full pin-for-pin compatibility and equivalent electrical performance as the discontinued original component.

Parameter Comparison

Engineering Selection Recommendations

The PS9851-1-F3-AX from Renesas Electronics Corporation is the qualified substitute for the discontinued CEL variant. Both versions are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99. The Renesas variant is available in active production with Tape & Reel packaging, ensuring consistent availability and supply chain reliability. The identical electrical specifications and physical package dimensions enable direct board-level substitution without design modifications or re-qualification requirements.

Frequently Asked Questions (FAQ)

Q: Are the two PS9851-1-F3-AX variants truly interchangeable? A: Yes. Both variants share identical part numbers and meet all specified electrical and mechanical parameters. The isolation voltage, output topology, data rate, propagation delay, and package dimensions are equivalent across both manufacturers.

Q: What is the primary advantage of selecting the Renesas variant? A: The Renesas Electronics Corporation version maintains active product status and standard inventory availability, unlike the discontinued CEL original. This ensures long-term procurement viability and consistent lead times.

Q: Can this optoisolator be used in high-speed digital isolation applications? A: The 15Mbps data rate and 60ns propagation delay specifications support digital isolation in moderate-speed applications. The 10kV/µs CMTI rating accommodates transient-rich environments typical of power conversion and motor control circuits.

Q: Does the package type affect board-level compatibility? A: The 8-SOIC package with 0.154" width (3.90mm) is consistent across both variants, enabling direct footprint compatibility. Standard surface mount assembly processes apply to both versions.

Q: Are there compliance considerations for end-application use? A: Both variants carry ROHS3 compliance and REACH unaffected status, suitable for regulated markets. The MSL rating of 1 (Unlimited) permits unlimited shelf life without moisture sensitivity concerns.