OCP-PCT114/E-TR Equivalent & Substitute Parts

Part Overview

The OCP-PCT114/E-TR is an optoisolator with transistor output manufactured by Lumex Opto/Components Inc. This component provides 5000Vrms isolation with a single channel configuration in a 4-SMD surface mount package. The device is classified as Active product status and is ROHS3 compliant. Substitute parts are identified when inventory constraints, lead time requirements, or design flexibility necessitate alternative sourcing while maintaining electrical and mechanical compatibility within specified parameter ranges.

Substiute Parts

OCP-PCT114/E-TR

Lumex Opto/Components Inc.In Stock: 1214OCP-PCT114/E-TR Datasheet

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FOD817S

onsemiIn Stock: 2132FOD817S Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for optoisolator transistor output devices is determined by the following critical parameters:

Isolation Voltage: Both main and substitute parts must maintain 5000Vrms isolation rating.

Output Configuration: Both parts must feature transistor output with single channel configuration.

Package Type: Both parts must use 4-SMD surface mount package with Gull Wing lead configuration to ensure PCB compatibility.

Current Transfer Ratio Range: Substitute parts must operate within acceptable CTR specifications. The main part specifies 60% minimum at 2mA input current; substitute parts with different test conditions (5mA) remain compatible if the CTR envelope encompasses typical application requirements.

Output Voltage and Current Ratings: Maximum output voltage and current per channel must meet or exceed application requirements. The main part supports 60V maximum output and 50mA per channel.

Saturation Voltage: Vce saturation characteristics affect switching performance and power dissipation in output stage.

Compliance and Status: Both parts must maintain Active product status and ROHS3 compliance for production use.

Parameter Comparison

Engineering Selection Recommendations

OCP-PCT114/E-TR Selection Criteria:

Use the OCP-PCT114/E-TR when design specifications require the exact Lumex manufacturer part, when inventory availability is confirmed at 1116 pieces, or when the operating temperature range of -30°C to 100°C is sufficient for the application. This part maintains Active product status and full ROHS3 compliance.

FOD817S Selection Criteria:

The FOD817S from onsemi is electrically compatible as a substitute when the following conditions are met: the application can tolerate the lower minimum CTR specification (50% @ 5mA versus 60% @ 2mA), the wider operating temperature range (-55°C to 110°C) is acceptable or beneficial, faster switching response (4µs rise, 3µs fall) is compatible with circuit timing requirements, and the higher maximum output voltage rating (70V versus 60V) does not create design conflicts. The FOD817S maintains Active product status, ROHS3 compliance, and offers higher inventory availability at 2100 pieces. The lower Vce saturation voltage (200mV versus 300mV) results in reduced output stage power dissipation.

Both parts are suitable for production use based on Active status and regulatory compliance. Selection between them depends on specific application requirements within the parameter ranges provided.

Frequently Asked Questions (FAQ)

Q: Can FOD817S directly replace OCP-PCT114/E-TR in existing designs?

A: FOD817S is electrically compatible for applications where the specified parameter differences do not create functional conflicts. The lower minimum CTR at a different test current, faster switching times, and lower saturation voltage are generally advantageous. Verify that your circuit design does not depend on the specific CTR test conditions or thermal characteristics of the original part.

Q: What is the significance of the different CTR test conditions (2mA vs 5mA)?

A: Current Transfer Ratio is measured at specified input LED current levels. OCP-PCT114/E-TR specifies CTR at 2mA input, while FOD817S specifies CTR at 5mA input. The 50% minimum for FOD817S at 5mA input current is not directly comparable to 60% at 2mA. Both parts achieve 600% maximum CTR. Application circuits must verify that actual operating conditions fall within the CTR envelope of the selected part.

Q: Are the 4-SMD packages identical between manufacturers?

A: Both parts use 4-SMD Gull Wing package configuration, which is the standard surface mount footprint for single-channel optoisolators in this class. PCB layout and reflow profiles should be compatible. Consult individual manufacturer datasheets for specific pad dimensions and placement tolerances if precision is required.

Q: What are the inventory implications?

A: OCP-PCT114/E-TR has 1116 pieces in stock. FOD817S has 2100 pieces in stock. FOD817S offers greater availability for high-volume production or extended lead time scenarios.

Q: Does the wider operating temperature range of FOD817S affect reliability?

A: FOD817S operates from -55°C to 110°C compared to OCP-PCT114/E-TR at -30°C to 100°C. The wider range indicates the part is qualified for extended temperature extremes. If your application operates within -30°C to 100°C, both parts are suitable. If your application requires operation below -30°C or above 100°C, FOD817S is required.

Q: How does lower Vce saturation voltage in FOD817S impact circuit design?

A: Lower saturation voltage (200mV versus 300mV) reduces power dissipation in the output transistor stage. This is generally beneficial for thermal management and efficiency. Circuit designs that depend on specific saturation voltage characteristics should be reviewed, though most applications benefit from the lower value.

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both OCP-PCT114/E-TR and FOD817S are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for production use.