OP525F Optoisolator Transistor Equivalent & Substitute Parts

Part Overview

The OP525F is an optoisolator with transistor output manufactured by TT Electronics/Optek Technology in a 1210 (3225 Metric) surface mount package. This component features a single channel design with a maximum output voltage of 30V and output current capability of 20mA, suitable for isolation applications requiring fast switching response with typical rise and fall times of 15µs.

The OP525F is classified as obsolete. Identifying compatible substitute parts is necessary to maintain design continuity and ensure component availability for production and maintenance applications.

Substiute Parts

OP525F

TT Electronics/Optek TechnologyIn Stock: 872OP525F Datasheet

Current PartRFQ

PT42-21B/TR8

Everlight Electronics Co LtdIn Stock: 57379PT42-21B/TR8 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The PT42-21B/TR8 phototransistor from Everlight Electronics Co Ltd qualifies as a substitute based on the following critical parameters:

Matching Electrical Characteristics:

• Voltage - Collector Emitter Breakdown (Max): 30V (matches OP525F maximum output voltage)
• Current - Collector (Ic) (Max): 20mA (matches OP525F output current)
• Package / Case: 1210 (3225 Metric) (identical mechanical form factor)
• Mounting Type: Surface Mount (identical mounting method)

Compliance Alignment:

• RoHS Status: ROHS3 Compliant (matches OP525F)
• REACH Status: REACH Unaffected (matches OP525F)
• ECCN: EAR99 (matches OP525F)

The PT42-21B/TR8 operates as a phototransistor with 940nm wavelength sensitivity and maintains electrical performance boundaries within the OP525F specifications for voltage and current ratings.

Parameter Comparison

Engineering Selection Recommendations

The PT42-21B/TR8 is suitable as a substitute for the obsolete OP525F based on electrical parameter alignment and regulatory compliance. Both components maintain identical maximum voltage (30V) and current (20mA) ratings within the 1210 surface mount package form factor.

The PT42-21B/TR8 carries active product status from Everlight Electronics Co Ltd, ensuring ongoing availability and supply chain continuity. Both components meet ROHS3 compliance and REACH unaffected status, maintaining regulatory requirements for modern applications.

The operating temperature range of the PT42-21B/TR8 (-25°C ~ 85°C) is slightly narrower than the OP525F (-40°C ~ 80°C) at the lower temperature extreme. Applications requiring operation below -25°C require design verification.

The moisture sensitivity level differs between components (OP525F: 2A at 4 weeks; PT42-21B/TR8: 3 at 168 hours), requiring attention to storage and handling protocols during manufacturing.

Frequently Asked Questions (FAQ)

Q: What are the critical parameters for substituting the OP525F?

A: The maximum collector-emitter voltage (30V), maximum collector current (20mA), and 1210 surface mount package form factor are the primary electrical and mechanical parameters determining substitution compatibility. Both the OP525F and PT42-21B/TR8 meet these specifications.

Q: Are there differences in functional operation between the OP525F and PT42-21B/TR8?

A: The OP525F is an optoisolator with integrated LED input and transistor output, while the PT42-21B/TR8 is a phototransistor with external light source sensitivity at 940nm wavelength. Circuit design modifications may be required to accommodate the different input mechanisms.

Q: Does the PT42-21B/TR8 meet the same compliance standards as the OP525F?

A: Both components are ROHS3 compliant and REACH unaffected. Regulatory compliance requirements are maintained with this substitution.

Q: What is the impact of the different operating temperature ranges?

A: The OP525F operates from -40°C to 80°C, while the PT42-21B/TR8 operates from -25°C to 85°C. Applications requiring operation below -25°C must verify compatibility with the substitute part's lower temperature limit.

Q: Are there packaging or handling differences between these components?

A: Both use identical 1210 (3225 Metric) surface mount packages. However, moisture sensitivity levels differ: OP525F is MSL 2A (4 weeks) and PT42-21B/TR8 is MSL 3 (168 hours). Storage and handling protocols must reflect the PT42-21B/TR8 moisture sensitivity requirements.

Q: Is the PT42-21B/TR8 currently available?

A: Yes, the PT42-21B/TR8 is classified as active product status with 57,300 pieces in stock, ensuring supply availability compared to the obsolete OP525F.