PS2861-1-F3-K-A Equivalent & Substitute Parts

Part Overview

The PS2861-1-F3-K-A is a 2500Vrms optoisolator with transistor output manufactured by CEL in a 4-SOIC package. This component provides galvanic isolation for single-channel DC input applications with a maximum output current of 40mA per channel. The part is classified as obsolete, necessitating identification of active equivalent components to maintain design continuity and ensure long-term supply availability for new production and field replacements.

Substiute Parts

PS2861-1-F3-K-A

CELIn Stock: 769PS2861-1-F3-K-A Datasheet

Current PartRFQ

PS2811-1-K-A

Renesas Electronics CorporationIn Stock: 743PS2811-1-K-A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PS2861-1-F3-K-A is determined by strict equivalence across the following critical parameters:

Isolation Voltage: 2500Vrms isolation rating is mandatory for functional compatibility.

Channel Configuration: Single-channel (1 channel) output topology must be maintained.

Output Stage: Transistor output type is required for circuit interface compatibility.

Output Specifications: Maximum output voltage of 40V and output current of 40mA per channel define the load-driving capability.

Saturation Characteristics: Vce saturation maximum of 300mV establishes the on-state voltage drop specification.

Current Transfer Ratio: The 200% minimum and 400% maximum CTR at specified test conditions determines the input-to-output current gain characteristics.

Package Compatibility: 4-SOIC surface mount package with 0.173" (4.40mm) width ensures PCB layout and assembly compatibility.

Operating Temperature: -55°C to 100°C temperature range defines the thermal operating envelope.

The PS2811-1-K-A from Renesas Electronics Corporation meets all these substitution criteria and is classified as an active product with current manufacturing status.

Parameter Comparison

Engineering Selection Recommendations

The PS2811-1-K-A qualifies as a direct substitute for the PS2861-1-F3-K-A based on functional parameter equivalence. The primary advantage of selecting the PS2811-1-K-A is its active product status, ensuring continued availability and manufacturing support from Renesas Electronics Corporation.

The substitute part maintains all critical electrical specifications: 2500Vrms isolation voltage, single-channel transistor output, 40V maximum output voltage, 40mA output current capability, and 300mV maximum Vce saturation. The operating temperature range and surface mount 4-SOIC package are identical.

The PS2811-1-K-A carries ROHS3 compliance certification, meeting current regulatory requirements for new product designs and manufacturing. Both parts share identical moisture sensitivity level (MSL 1) and REACH compliance status.

The minor variation in forward voltage (1.15V typical for PS2811-1-K-A versus 1.1V for PS2861-1-F3-K-A) and the difference in current transfer ratio test conditions (1mA for PS2811-1-K-A versus 5mA for PS2861-1-F3-K-A) do not affect functional substitution, as both parts meet the specified minimum and maximum CTR ranges.

Frequently Asked Questions (FAQ)

Q: Can the PS2811-1-K-A be used as a direct replacement for PS2861-1-F3-K-A in existing designs?

A: Yes. The PS2811-1-K-A meets all functional substitution criteria. Both parts feature identical isolation voltage (2500Vrms), single-channel configuration, transistor output type, maximum output specifications (40V, 40mA), saturation characteristics (300mV), and operating temperature range (-55°C to 100°C). The 4-SOIC surface mount package dimensions are identical, enabling direct PCB layout compatibility.

Q: What is the significance of the different current transfer ratio test conditions?

A: The PS2861-1-F3-K-A specifies CTR at 5mA input current, while the PS2811-1-K-A specifies CTR at 1mA input current. Both parts maintain the same 200% minimum and 400% maximum CTR range. The lower test current for the substitute part indicates equivalent or superior current transfer characteristics and does not affect circuit performance.

Q: Are there compliance differences between these parts?

A: The PS2811-1-K-A carries ROHS3 compliance certification, while the PS2861-1-F3-K-A compliance status is not specified. Both parts are REACH Affected and carry identical MSL 1 (Unlimited) moisture sensitivity ratings. For new designs, the PS2811-1-K-A is recommended due to its active status and current regulatory compliance.

Q: Does the forward voltage difference affect circuit design?

A: The forward voltage difference (1.1V typical for PS2861-1-F3-K-A versus 1.15V for PS2811-1-K-A) is within normal component variation and does not require circuit redesign. Both values fall within acceptable ranges for optoisolator input stage design.

Q: Why is the PS2861-1-F3-K-A classified as obsolete?

A: The PS2861-1-F3-K-A is an obsolete product from CEL. The PS2811-1-K-A from Renesas Electronics Corporation is an active equivalent that provides continued supply availability and manufacturing support for applications requiring 2500Vrms single-channel optoisolator functionality.

Q: Are there any package or pinout differences?

A: No. Both parts use the 4-SOIC surface mount package with identical 0.173" (4.40mm) width. Pinout and PCB footprint compatibility are maintained, enabling direct substitution without layout modifications.