PS2501L-2 Equivalent & Substitute Parts

Part Overview

The PS2501L-2 is a 2-channel optoisolator with transistor output manufactured by CEL, designed for high-voltage isolation applications requiring 5000Vrms isolation rating. This component features surface mount packaging in 8-SMD Gull Wing configuration and supports DC input with transistor output topology.

The PS2501L-2 is classified as obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications currently utilizing this component.

Substiute Parts

PS2501L-2

CELIn Stock: 1741PS2501L-2 Datasheet

Current PartRFQ

OCP-PCT218/E-TR

Lumex Opto/Components Inc.In Stock: 1163OCP-PCT218/E-TR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the PS2501L-2 are identified based on the following critical parameters that determine functional compatibility:

Primary Matching Criteria:

• Number of Channels: 2
• Voltage - Isolation: 5000Vrms
• Output Type: Transistor
• Package / Case: 8-SMD, Gull Wing
• Mounting Type: Surface Mount
• Current - Output / Channel: 50mA minimum

Secondary Compatibility Parameters:

• Input Type: DC
• Voltage - Output (Max): Equal to or greater than 60V
• Vce Saturation (Max): 300mV or lower
• Moisture Sensitivity Level: 1 (Unlimited)

The OCP-PCT218/E-TR manufactured by Lumex Opto/Components Inc. meets all primary matching criteria and maintains compatibility across secondary parameters. This substitute part is classified as active product status, ensuring ongoing availability and supply chain support.

Parameter Comparison

Engineering Selection Recommendations

Substitution Feasibility:

The OCP-PCT218/E-TR is a functional substitute for the PS2501L-2 in applications where the following conditions are satisfied:

1. Output Voltage Requirement: Applications requiring maximum output voltage of 60V or less. The PS2501L-2 supports 80V maximum output; designs operating above 60V require the original part.

2. Forward Current Requirement: Applications requiring maximum DC forward current of 50mA or less. The PS2501L-2 supports 80mA maximum; designs requiring higher forward current require the original part.

3. Operating Temperature Range: Applications operating within -30°C to 100°C. The PS2501L-2 supports -55°C to 100°C; designs requiring operation below -30°C require the original part.

4. Current Transfer Ratio: The OCP-PCT218/E-TR minimum CTR of 60% @ 2mA is lower than the PS2501L-2 minimum of 80% @ 5mA. Circuit designs dependent on higher minimum CTR values require verification against the OCP-PCT218/E-TR specification.

Regulatory and Compliance Advantages:

The OCP-PCT218/E-TR is ROHS3 compliant and REACH unaffected, providing regulatory advantages over the non-compliant PS2501L-2. For new designs or production requiring current regulatory compliance, the OCP-PCT218/E-TR is the preferred selection.

Product Availability:

The PS2501L-2 is obsolete. The OCP-PCT218/E-TR is active product status, ensuring long-term supply chain availability and manufacturing support.

Frequently Asked Questions (FAQ)

Q: Can the OCP-PCT218/E-TR directly replace the PS2501L-2 in all applications?

A: Direct replacement is possible only when application requirements do not exceed the OCP-PCT218/E-TR parameter limits. Specifically: maximum output voltage of 60V, maximum DC forward current of 50mA, and operating temperature range of -30°C to 100°C. Applications exceeding any of these parameters require the original PS2501L-2 or alternative parts.

Q: What is the difference in current transfer ratio between these parts?

A: The PS2501L-2 specifies minimum CTR of 80% @ 5mA, while the OCP-PCT218/E-TR specifies minimum CTR of 60% @ 2mA. Both parts specify maximum CTR of 600%. The test current differs between specifications. Circuit designs relying on minimum CTR performance must account for the lower minimum value of the OCP-PCT218/E-TR.

Q: Are the packages identical?

A: Both parts use 8-SMD Gull Wing surface mount packaging. Pin configuration and footprint compatibility must be verified against manufacturer datasheets before PCB layout finalization.

Q: What are the regulatory compliance differences?

A: The PS2501L-2 is RoHS non-compliant and REACH affected. The OCP-PCT218/E-TR is ROHS3 compliant and REACH unaffected. For applications subject to current regulatory requirements, the OCP-PCT218/E-TR meets compliance standards.

Q: Why is the PS2501L-2 obsolete?

A: The PS2501L-2 is classified as obsolete by the manufacturer. The OCP-PCT218/E-TR represents the active equivalent in the optoisolator 2-channel 5000Vrms transistor output category.

Q: What is the operating temperature consideration?

A: The PS2501L-2 operates from -55°C to 100°C. The OCP-PCT218/E-TR operates from -30°C to 100°C. Applications requiring operation below -30°C cannot use the OCP-PCT218/E-TR as a substitute.

Q: Are switching characteristics compatible?

A: Rise and fall times are similar: PS2501L-2 specifies 3µs rise and 5µs fall time; OCP-PCT218/E-TR specifies 5µs rise and 4µs fall time. Both parts exhibit comparable switching performance suitable for typical optoisolator applications.