The PS2861B-1 is an optically coupled isolator containing a GaAs light emitting diode and an NPN silicon phototransistor. The package has a shield effect to cut off ambient light, and is mounted in a Shrink SOP (Small Outline Package) for high density applications. Due to the high isolation voltage between the input and output, the PS2861B-1 is suitable for interface and signal transfer circuits that require surface or high-density mounting.


  • Operating ambient temperature: 110°C
  • Isolation distance (0.4 mm MIN.)
  • High isolation voltage (BV = 3 750 Vr.m.s.)
  • Shrink SOP (Small Outline Package) type
  • High-speed switching (tr = 4μs TYP., tf == 5μs TYP.)
  • Embossed tape product: PS2861B-1-F3: 3 500 pcs/reel
  • Pb-Free product
  • Safety standards UL approved: UL1577, Single protection CSA approved: CAN/CSA-C22.2 No. 62368-1, Reinforced insulation BSI approved: BS EN 62368-1, Reinforced insulation SEMKO approved: EN 62368-1, IEC 62368-1, Reinforced insulation NEMKO approved: EN 62368-1, Reinforced insulation FIMKO approved: EN 62368-1, Reinforced insulation DEMKO approved: EN 62368-1, Reinforced insulation CQC approved: GB8898, GB4943.1, Reinforced insulation VDE approved: DIN EN 60747-5-5 (Option)

Product Options

Part Number Part Status Carrier Type PLP Buy Sample
Active 2028 Jul
Active 2028 Jul


Title language Type Format File Size Date
Datasheets & Errata
PS2861B-1 Data Sheet Datasheet PDF 5.13 MB
Application Notes & White Papers
PS2500-Series Application Note 日本語 Application Note PDF 466 KB
Photocouplers Applications Note Application Note PDF 957 KB
Analog ICs Brochure 日本語 Brochure PDF 4.20 MB
Photocouplers Brochure 日本語 Brochure PDF 4.39 MB
Photocouplers Selection Guide 日本語 Brochure PDF 4.34 MB