PS2801C-1-F3-A Optoisolator Equivalent & Substitute Parts

Part Overview

The PS2801C-1-F3-A is a single-channel optoisolator with transistor output, rated for 2500Vrms isolation voltage. This component is designed for applications requiring galvanic isolation between input and output circuits in industrial, automotive, and consumer electronics systems. The part is currently discontinued at DiGi Electronics, making identification of functionally compatible substitutes essential for design continuity and system maintenance.

Key Parameters

Parameter	Value
Voltage - Isolation	2500Vrms
Number of Channels	1
Output Type	Transistor
Current Transfer Ratio (Min)	50% @ 5mA
Current Transfer Ratio (Max)	400% @ 5mA
Voltage - Output (Max)	80V
Current - Output / Channel	30mA
Turn On / Turn Off Time (Typ)	10µs, 7µs
Rise / Fall Time (Typ)	5µs, 7µs
Vce Saturation (Max)	300mV
Operating Temperature	-55°C ~ 100°C
Package / Case	4-SOIC (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the PS2801C-1-F3-A is determined by the following critical parameters:

Primary Isolation Characteristics: Voltage isolation rating (2500Vrms minimum), single-channel configuration, and transistor output type are fundamental to maintaining circuit isolation requirements.

Electrical Performance: Current transfer ratio range (50% to 400% @ 5mA), maximum output voltage (80V), and output current capacity (30mA) define the signal coupling efficiency and load-driving capability.

Timing Specifications: Turn-on/turn-off times and rise/fall times ensure compatibility with timing-sensitive applications.

Package Compatibility: Surface-mount 4-SOIC package with 0.173" width and 4.40mm physical dimensions is required for board-level compatibility.

Regulatory Compliance: RoHS3 compliance and REACH unaffected status are essential for modern design standards.

The following parts meet these substitution criteria within the allowable parameter ranges.

Parameter Comparison

Parameter	PS2801C-1-F3-A	PS2801C-1-A	TCMT1106	PS2801C-1-V-F3-A
Manufacturer	CEL	Renesas Electronics Corporation	Vishay Semiconductor Opto Division	Renesas Electronics Corporation
Voltage - Isolation	2500Vrms	2500Vrms	3750Vrms	2500Vrms
Number of Channels	1	1	1	1
Current Transfer Ratio (Min)	50% @ 5mA	50% @ 5mA	100% @ 5mA	50% @ 5mA
Current Transfer Ratio (Max)	400% @ 5mA	400% @ 5mA	300% @ 5mA	400% @ 5mA
Turn On / Turn Off Time (Typ)	10µs, 7µs	10µs, 7µs	9.5µs, 8.5µs	10µs, 7µs
Rise / Fall Time (Typ)	5µs, 7µs	5µs, 7µs	5.5µs, 7µs	5µs, 7µs
Voltage - Output (Max)	80V	80V	70V	80V
Current - Output / Channel	30mA	30mA	50mA	30mA
Vce Saturation (Max)	300mV	300mV	300mV	300mV
Operating Temperature	-55°C ~ 100°C	-55°C ~ 100°C	-40°C ~ 100°C	-55°C ~ 100°C
Package / Case	4-SOIC (0.173", 4.40mm Width)	4-SOIC (0.173", 4.40mm Width)	4-SOIC (0.173", 4.40mm Width)	4-SOIC (0.173", 4.40mm Width)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Discontinued at DiGi Electronics	Not For New Designs	Active	Active

Engineering Selection Recommendations

PS2801C-1-V-F3-A is the preferred parametric equivalent. This part maintains identical electrical specifications to the main part while offering active product status with current availability. The Renesas Electronics Corporation part is ROHS3 compliant and supports continued supply for replacement applications.

TCMT1106 (Vishay Semiconductor Opto Division) serves as a functional alternative with enhanced performance characteristics. The part provides higher isolation voltage (3750Vrms), superior current transfer ratio minimum (100% vs. 50%), and increased output current capacity (50mA vs. 30mA). The maximum output voltage is reduced to 70V and the operating temperature minimum is -40°C instead of -55°C. This part is active and stocked, making it suitable for new designs with relaxed lower-temperature requirements.

PS2801C-1-A (Renesas Electronics Corporation) is a direct parametric match but carries "Not For New Designs" status. This part is only appropriate for repair and maintenance of existing systems using the original PS2801C-1-F3-A component.

Frequently Asked Questions (FAQ)

Q: Can I directly substitute TCMT1106 for PS2801C-1-F3-A without circuit redesign? A: TCMT1106 substitution requires design review. The reduced maximum output voltage (70V vs. 80V) and different lower operating temperature limit (-40°C vs. -55°C) must be evaluated against system requirements. All other parameters remain compatible.

Q: Is PS2801C-1-V-F3-A a true drop-in replacement? A: Yes. PS2801C-1-V-F3-A is electrically and mechanically identical to PS2801C-1-F3-A. The Tape & Reel packaging format is the primary physical difference, which does not affect circuit operation.

Q: What is the key difference between PS2801C-1-A and PS2801C-1-V-F3-A? A: Both parts are electrically equivalent. PS2801C-1-A uses Strip packaging while PS2801C-1-V-F3-A uses Tape & Reel packaging. The primary distinction is product status: PS2801C-1-A is marked "Not For New Designs," whereas PS2801C-1-V-F3-A is Active.

Q: Why is TCMT1106 listed as a substitute if parameters differ? A: TCMT1106 provides functional circuit isolation with improved performance margins. The higher isolation voltage, faster switching times, and greater output current capacity make it suitable for applications where these enhancements do not create design conflicts. The reduced maximum output voltage and operating temperature range must be confirmed as acceptable within the target system.

Q: What packaging options are available for PS2801C-1-F3-A alternatives? A: PS2801C-1-V-F3-A is supplied in Tape & Reel format. PS2801C-1-A is supplied in Strip format. TCMT1106 is supplied in Cut Tape and Digi-Reel formats. All maintain the identical 4-SOIC surface-mount package footprint.

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