PS2801-1-A Optoisolator Equivalent & Substitute Parts

Part Overview

The PS2801-1-A is a single-channel optoisolator with transistor output manufactured by CEL, designed for 2500Vrms isolation applications. This component features a 4-SSOP surface mount package and is rated for 50mA output current with a maximum output voltage of 80V. The part is currently discontinued at DiGi Electronics, making identification of equivalent substitute components essential for ongoing design support and procurement.

Substiute Parts

PS2801-1-A

CELIn Stock: 1868PS2801-1-A Datasheet

Current PartRFQ

TCMT1106

Vishay Semiconductor Opto DivisionIn Stock: 4173TCMT1106 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PS2801-1-A optoisolator is determined by the following critical parameters:

Mandatory Compatibility Criteria:

• Single-channel configuration (Number of Channels = 1)
• Transistor output type
• Surface mount technology with 4-SOIC package footprint (0.173", 4.40mm Width)
• DC input type
• Output current rating of 50mA per channel
• Vce saturation maximum of 300mV

Isolation and Performance Parameters:

• Voltage isolation rating (minimum 2500Vrms required for direct substitution)
• Current transfer ratio range (80% to 600% @ 5mA for PS2801-1-A)
• Maximum output voltage (80V for PS2801-1-A)
• Operating temperature range (-55°C ~ 100°C for PS2801-1-A)

The TCMT1106 from Vishay Semiconductor Opto Division qualifies as a substitute based on matching the mandatory criteria while exceeding isolation voltage specifications and maintaining compatible electrical performance within the 4-SOIC package standard.

Parameter Comparison

Engineering Selection Recommendations

PS2801-1-A (Original Part): The PS2801-1-A is discontinued at DiGi Electronics. Existing inventory of 1800 pieces is available as new original stock. This part is ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

TCMT1106 (Active Substitute): The TCMT1106 is an active product from Vishay Semiconductor Opto Division with 4108 pieces in new original stock. This substitute maintains ROHS3 compliance and REACH unaffected status. The TCMT1106 provides higher isolation voltage (3750Vrms versus 2500Vrms), supporting applications requiring enhanced isolation margins. Both parts share identical Vce saturation specifications (300mV maximum) and output current ratings (50mA per channel).

Selection Basis:

• Both parts are ROHS3 compliant and REACH unaffected
• Both are classified under ECCN EAR99 and HTSUS 8541.49.8000
• Both feature identical moisture sensitivity level (MSL 1 - Unlimited)
• The TCMT1106 offers superior isolation voltage performance while maintaining mechanical and electrical compatibility through the standard 4-SOIC package footprint

Frequently Asked Questions (FAQ)

Q: Can the TCMT1106 directly replace the PS2801-1-A in existing designs?

A: The TCMT1106 is mechanically and electrically compatible with the PS2801-1-A. Both components use the 4-SOIC (0.173", 4.40mm Width) package footprint and share identical pin configurations for single-channel transistor output optoisolators. The TCMT1106 provides higher isolation voltage (3750Vrms) and maintains the same maximum output current (50mA) and Vce saturation (300mV).

Q: What are the key differences between these two parts?

A: The primary differences are isolation voltage rating (TCMT1106 at 3750Vrms versus PS2801-1-A at 2500Vrms), current transfer ratio range (TCMT1106: 100-300% versus PS2801-1-A: 80-600%), switching speed (TCMT1106 is slower by approximately 3-4 microseconds), and maximum output voltage (TCMT1106 at 70V versus PS2801-1-A at 80V). Operating temperature range differs slightly (TCMT1106: -40°C to 100°C versus PS2801-1-A: -55°C to 100°C).

Q: Are there any compliance or regulatory differences?

A: Both parts are ROHS3 compliant, REACH unaffected, and classified under the same ECCN (EAR99) and HTSUS codes (8541.49.8000). Both maintain MSL 1 (Unlimited) moisture sensitivity level, indicating no special moisture handling requirements.

Q: What should be considered when selecting between these parts?

A: Selection should be based on application requirements for isolation voltage, switching speed, and output voltage limits. The TCMT1106 is recommended for applications requiring higher isolation margins or where the lower switching speed is acceptable. The PS2801-1-A may be preferred in designs requiring faster switching response or higher maximum output voltage, though it is discontinued and available only from existing inventory.

Q: Is the package footprint identical between these parts?

A: Yes. Both the PS2801-1-A and TCMT1106 use the 4-SOIC package with 0.173" width and 4.40mm body width. Both are surface mount components suitable for automated assembly processes.