PS2711-1-A Optoisolator Equivalent & Substitute Parts

Part Overview

The PS2711-1-A is a high-voltage isolation optoisolator manufactured by CEL, designed for applications requiring galvanic isolation up to 3750Vrms. This single-channel transistor output device operates in the NEPOC series and is packaged in a 4-SOP surface mount configuration. The part is currently discontinued at DiGi Electronics, making identification of compatible substitute components essential for ongoing design support and procurement continuity.

Substiute Parts

PS2711-1-A

CELIn Stock: 876PS2711-1-A Datasheet

Current PartRFQ

LTV-357T

Lite-On Inc.In Stock: 10147LTV-357T Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PS2711-1-A is determined by the following critical parameters:

Mandatory Matching Criteria:

• Isolation voltage rating of 3750Vrms
• Single-channel configuration
• Transistor output topology
• 4-SOP package format with gull wing leads
• Surface mount mounting type
• Input type: DC

Allowable Parameter Variations: Substitute parts may differ in current transfer ratio specifications, output voltage/current ratings, rise/fall time characteristics, and operating temperature range, provided the mandatory criteria are met and the substitute maintains functional compatibility within the application's electrical requirements.

The LTV-357T from Lite-On Inc. satisfies all mandatory matching criteria and qualifies as a direct substitute for the discontinued PS2711-1-A.

Parameter Comparison

Engineering Selection Recommendations

The LTV-357T is the qualified substitute for the PS2711-1-A based on the following factors:

Compliance & Regulatory: Both parts maintain ROHS3 compliance and identical moisture sensitivity ratings (MSL 1). The LTV-357T carries REACH Unaffected status, while the PS2711-1-A is REACH Affected; this distinction may be relevant for specific supply chain requirements.

Product Availability: The PS2711-1-A is discontinued at DiGi Electronics with no active procurement path. The LTV-357T is actively manufactured by Lite-On Inc. with substantial inventory availability (10,099 pcs), ensuring supply continuity.

Electrical Compatibility: The LTV-357T maintains the critical 3750Vrms isolation voltage, single-channel transistor output, and identical package format. The substitute exhibits improved performance characteristics: lower saturation voltage (200mV vs. 300mV), faster fall time (3µs vs. 5µs), and extended operating temperature range (-55°C to 110°C vs. -55°C to 100°C).

Application Verification Required: Designs operating at the PS2711-1-A's maximum output voltage specification (40V) must be evaluated against the LTV-357T's 35V maximum rating. Current transfer ratio specifications differ due to different test conditions; applications dependent on specific CTR values at 1mA input current require circuit-level validation.

Frequently Asked Questions (FAQ)

Q: Can the LTV-357T directly replace the PS2711-1-A in existing PCB designs?

A: Yes, the LTV-357T is pin-compatible and functionally equivalent for the 4-SOP package footprint. No PCB layout modifications are required. However, circuit performance must be verified if the design operates at the PS2711-1-A's maximum output voltage (40V) or relies on specific current transfer ratio characteristics at 1mA input current.

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

A: The PS2711-1-A specifies CTR at 1mA input current, while the LTV-357T specifies CTR at 5mA. These represent different operating points and cannot be directly compared. Applications must evaluate the LTV-357T's CTR performance at their actual input current levels to ensure adequate output drive capability.

Q: Is the 5V difference in maximum output voltage (40V vs. 35V) critical?

A: This depends on the application circuit design. If the design operates below 35V, the LTV-357T is fully compatible. Designs requiring operation at 36V to 40V must be re-evaluated or the PS2711-1-A must be sourced from alternative distributors.

Q: What are the advantages of substituting to the LTV-357T?

A: The LTV-357T offers improved performance (lower saturation voltage, faster switching), extended temperature range, and active product status with reliable supply availability. These characteristics may provide design margin improvements in new applications.

Q: Are there any regulatory or compliance differences between the two parts?

A: Both parts are ROHS3 compliant and carry identical moisture sensitivity ratings. The LTV-357T is REACH Unaffected while the PS2711-1-A is REACH Affected; this distinction may impact supply chain decisions for specific geographic markets or customer requirements.

Q: Can I use the LTV-357T in applications originally designed for other optoisolator families?

A: No. The LTV-357T is a substitute only for the PS2711-1-A. Other optoisolator families may have different isolation voltages, package formats, or electrical characteristics that make them incompatible. Substitution must be limited to parts explicitly listed in the equivalent parts documentation.