PS8821-1-A Optoisolator Equivalent & Substitute Parts

Part Overview

The PS8821-1-A is an optoisolator with transistor output rated for 2500Vrms isolation voltage in a single-channel 8-SOIC surface mount package. This component is currently in obsolete status, necessitating identification of active equivalent models to maintain supply continuity and design flexibility. The substitute parts listed are active Renesas Electronics products that maintain electrical and mechanical compatibility within the specified parameter ranges.

Substiute Parts

PS8821-1-A

CELIn Stock: 1177PS8821-1-A Datasheet

Current PartRFQ

PS8802-1-F3-AX

Renesas Electronics CorporationIn Stock: 2952PS8802-1-F3-AX Datasheet

SimilarRFQ

PS8802-1-V-AX

Renesas Electronics CorporationIn Stock: 1069PS8802-1-V-AX Datasheet

SimilarRFQ

PS8802-1-V-F3-AX

Renesas Electronics CorporationIn Stock: 2089PS8802-1-V-F3-AX Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PS8821-1-A is determined by the following critical electrical and mechanical parameters: 2500Vrms isolation voltage, single-channel configuration, 8-SOIC package footprint, surface mount technology, DC input type, and transistor output topology. All substitute parts maintain these core specifications. The substitute parts PS8802-1-F3-AX, PS8802-1-V-AX, and PS8802-1-V-F3-AX are functionally equivalent based on matching isolation voltage, channel count, package geometry, mounting method, and input/output type. Variations in current transfer ratio ranges (15-45% for substitutes versus minimum 20% for the original) and packaging format (Cut Tape, Strip, and Tape & Reel) represent product availability options rather than functional limitations, as all substitute parts meet or exceed the minimum current transfer ratio specification.

Parameter Comparison

Engineering Selection Recommendations

The PS8821-1-A is obsolete; therefore, one of the three Renesas Electronics PS8802 variants is required for new designs or continued supply. All three substitute parts are active products with ROHS3 compliance and REACH Unaffected status, eliminating regulatory concerns present in the original CEL component. Selection among PS8802-1-F3-AX, PS8802-1-V-AX, and PS8802-1-V-F3-AX should be based on packaging and inventory requirements rather than electrical performance, as all three maintain identical electrical specifications. The PS8802-1-F3-AX (Cut Tape packaging) and PS8802-1-V-F3-AX (Tape & Reel packaging) are suitable for high-volume production environments. The PS8802-1-V-AX (Strip packaging) is appropriate for lower-volume applications or component evaluation. Inventory availability across all three variants provides supply flexibility.

Frequently Asked Questions (FAQ)

Q: Can PS8802-1-F3-AX, PS8802-1-V-AX, and PS8802-1-V-F3-AX be used interchangeably with PS8821-1-A?

A: Yes. All three Renesas Electronics substitutes maintain identical isolation voltage (2500Vrms), single-channel configuration, output type (transistor), package footprint (8-SOIC), mounting method (surface mount), and input type (DC). The electrical performance specifications—current transfer ratio, output current, forward voltage, and operating temperature range—are functionally compatible across all devices. The differences in packaging format (Cut Tape, Strip, Tape & Reel) do not affect electrical or mechanical interchangeability.

Q: What is the difference between the three substitute part numbers?

A: The three substitute parts—PS8802-1-F3-AX, PS8802-1-V-AX, and PS8802-1-V-F3-AX—differ only in packaging and supply format. PS8802-1-F3-AX is supplied in Cut Tape format, PS8802-1-V-AX in Strip format, and PS8802-1-V-F3-AX in Tape & Reel format. All three have identical electrical specifications and base product number PS8802.

Q: Are there any performance differences between the PS8821-1-A and the substitute parts?

A: The substitute parts provide broader current transfer ratio specifications (15-45% @ 16mA versus 20% minimum for the original) and faster turn-off time for PS8802-1-F3-AX (600ns versus 500ns). These differences represent performance enhancements or expanded specification ranges rather than limitations. Output voltage capability differs: PS8821-1-A specifies 7V maximum, while PS8802-1-F3-AX specifies 35V maximum. Designs utilizing the original 7V limitation should account for the higher output voltage capability of substitute parts.

Q: What regulatory compliance improvements apply to the substitute parts?

A: All substitute parts are ROHS3 compliant and REACH Unaffected, eliminating the REACH compliance burden associated with the obsolete PS8821-1-A (REACH Affected). This is significant for applications in regulated markets or customers with supply chain compliance requirements.

Q: Are the package dimensions identical between the original and substitute parts?

A: Yes. Both the PS8821-1-A and all three substitute parts use the 8-SOIC package with identical dimensions (0.154" × 3.90mm width). PCB footprints and placement requirements are identical; no layout modifications are necessary for design migration.