OCP-PCT114/E Equivalent & Substitute Parts Reference

Part Overview

The OCP-PCT114/E is a 5000Vrms optoisolator with transistor output manufactured by Lumex Opto/Components Inc. in 4-DIP through-hole packaging. This component is classified as Active product status with full RoHS3 compliance and REACH unaffected designation. The device integrates a single isolation channel with DC input and transistor output configuration, suitable for applications requiring galvanic isolation in industrial and consumer electronics.

Substitute parts are necessary when OCP-PCT114/E inventory becomes unavailable or when design requirements necessitate alternative current transfer ratio specifications. The FOD817 series from onsemi provides functionally equivalent alternatives with identical isolation voltage, package form factor, and output characteristics while offering extended operating temperature range and improved saturation voltage performance.

Key Parameters

Parameter	OCP-PCT114/E	Unit
Voltage - Isolation	5000	Vrms
Number of Channels	1	—
Output Type	Transistor	—
Voltage - Output (Max)	60	V
Current - Output / Channel	50	mA
Vce Saturation (Max)	300	mV
Voltage - Forward (Vf) (Typ)	1.2	V
Current - DC Forward (If) (Max)	50	mA
Operating Temperature	-30 to 100	°C
Package / Case	4-DIP (0.300", 7.62mm)	—
Mounting Type	Through Hole	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution eligibility for the OCP-PCT114/E is determined by strict adherence to the following electrical and mechanical parameters:

Critical Parameters (Must Match):

Voltage - Isolation: 5000Vrms
Number of Channels: 1
Output Type: Transistor
Input Type: DC
Package / Case: 4-DIP (0.300", 7.62mm)
Mounting Type: Through Hole
Current - Output / Channel: 50mA maximum
Voltage - Forward (Vf): 1.2V typical
Current - DC Forward (If): 50mA maximum

Allowable Variation Parameters:

Current Transfer Ratio (Min/Max): Substitutes may have different CTR specifications provided the minimum CTR at specified test current is sufficient for the application
Voltage - Output (Max): Substitutes rated at 70V are acceptable as this exceeds the 60V requirement
Vce Saturation (Max): Substitutes with 200mV saturation voltage are acceptable as this is lower than the 300mV specification
Operating Temperature: Extended range (-55°C to 110°C) is acceptable as it encompasses the OCP-PCT114/E range
Rise / Fall Time: Substitutes with 4µs rise and 3µs fall times are acceptable as these are faster than the OCP-PCT114/E specification

All FOD817 series variants (FOD817, FOD817A, FOD817B, FOD817C, FOD817C300, FOD817D) from onsemi meet these substitution criteria.

Parameter Comparison

Parameter	OCP-PCT114/E	FOD817	FOD817A	FOD817B	FOD817C	FOD817C300	FOD817D	Unit
Voltage - Isolation	5000	5000	5000	5000	5000	5000	5000	Vrms
Number of Channels	1	1	1	1	1	1	1	—
Current Transfer Ratio (Min)	60% @ 2mA	50% @ 5mA	80% @ 5mA	130% @ 5mA	200% @ 5mA	200% @ 5mA	300% @ 5mA	—
Current Transfer Ratio (Max)	600% @ 2mA	600% @ 5mA	160% @ 5mA	260% @ 5mA	400% @ 5mA	400% @ 5mA	600% @ 5mA	—
Rise / Fall Time (Typ)	5µs, 4µs	4µs, 3µs	4µs, 3µs	4µs, 3µs	4µs, 3µs	4µs, 3µs	4µs, 3µs	µs
Voltage - Output (Max)	60	70	70	70	70	70	70	V
Current - Output / Channel	50	50	50	50	50	50	50	mA
Voltage - Forward (Vf) (Typ)	1.2	1.2	1.2	1.2	1.2	1.2	1.2	V
Current - DC Forward (If) (Max)	50	50	50	50	50	50	50	mA
Vce Saturation (Max)	300	200	200	200	200	200	200	mV
Operating Temperature	-30 to 100	-55 to 110	-55 to 110	-55 to 110	-55 to 110	-55 to 110	-55 to 110	°C
Package / Case	4-DIP (0.300", 7.62mm)	4-DIP (0.300", 7.62mm)	4-DIP (0.300", 7.62mm)	4-DIP (0.300", 7.62mm)	4-DIP (0.300", 7.62mm)	4-DIP (0.300", 7.62mm)	4-DIP (0.300", 7.62mm)	—
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	—
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	—

Engineering Selection Recommendations

All FOD817 series variants are direct substitutes for the OCP-PCT114/E based on compliance and certification alignment. Both the main part and all substitute options maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory compatibility across industrial and consumer applications.

Selection by Current Transfer Ratio Requirement:

FOD817 variants are differentiated by current transfer ratio specifications at 5mA test current. Selection should be based on the specific CTR requirement of the application circuit:

FOD817: 50% to 600% CTR range. Lowest minimum CTR specification.
FOD817A: 80% to 160% CTR range. Narrow mid-range specification.
FOD817B: 130% to 260% CTR range. Mid-range specification.
FOD817C / FOD817C300: 200% to 400% CTR range. Higher minimum CTR specification.
FOD817D: 300% to 600% CTR range. Highest minimum CTR specification.

Performance Advantages of FOD817 Series:

All FOD817 variants provide improved saturation voltage performance (200mV maximum versus 300mV for OCP-PCT114/E), faster switching characteristics (4µs rise / 3µs fall versus 5µs rise / 4µs fall), and extended operating temperature range (-55°C to 110°C versus -30°C to 100°C). These characteristics are beneficial for applications requiring enhanced thermal performance or faster signal switching.

Inventory Availability:

FOD817C300 maintains the highest inventory level (32,088 pieces) among all substitute options, followed by FOD817A (20,300 pieces) and FOD817C (18,671 pieces). FOD817D has the lowest inventory (1,840 pieces).

Frequently Asked Questions (FAQ)

Q: Can FOD817 series parts be used as direct pin-for-pin replacements for OCP-PCT114/E?

A: Yes. All FOD817 variants share identical 4-DIP package geometry (0.300", 7.62mm) and through-hole mounting configuration. Pin assignments are compatible for direct substitution on existing PCB layouts without modification.

Q: What is the primary difference between FOD817 variants?

A: The primary difference is the current transfer ratio (CTR) specification at 5mA test current. FOD817A has the narrowest CTR range (80-160%), while FOD817D has the widest range (300-600%). Selection depends on the application's CTR requirement. All variants maintain identical isolation voltage, output voltage rating, output current capability, and package form factor.

Q: Are there any temperature operating range limitations when substituting FOD817 parts?

A: No. The FOD817 series operates across -55°C to 110°C, which encompasses the OCP-PCT114/E operating range of -30°C to 100°C. Applications operating within the OCP-PCT114/E temperature specification will function within the FOD817 specification envelope.

Q: Does the improved saturation voltage (200mV vs 300mV) of FOD817 parts affect circuit design?

A: The lower saturation voltage of FOD817 variants represents improved performance. This lower voltage drop across the transistor output reduces power dissipation and may improve switching speed in applications with tight timing requirements. No circuit redesign is necessary; the lower saturation voltage is a beneficial characteristic.

Q: What is the significance of the CTR test current difference (2mA for OCP-PCT114/E vs 5mA for FOD817)?

A: Current transfer ratio is measured at different test currents for each device family. The OCP-PCT114/E specifies CTR at 2mA input current, while FOD817 variants specify CTR at 5mA input current. When comparing CTR specifications between these families, the test current difference must be considered. For applications requiring specific CTR performance, circuit design should reference the appropriate datasheet specifications.

Q: Are all FOD817 variants suitable for high-speed switching applications?

A: Yes. All FOD817 variants (FOD817, FOD817A, FOD817B, FOD817C, FOD817C300, FOD817D) specify identical rise time (4µs) and fall time (3µs), which are faster than the OCP-PCT114/E specification (5µs rise, 4µs fall). All variants are suitable for applications requiring the specified switching speed.

Q: Which FOD817 variant should be selected for general-purpose replacement?

A: FOD817C or FOD817C300 provide balanced specifications with 200-400% CTR range and highest inventory availability. FOD817C300 specifically offers the highest inventory level (32,088 pieces) for immediate availability. Selection should ultimately be based on the specific CTR requirement of the application circuit.

Q: Do FOD817 parts require any special handling or storage considerations compared to OCP-PCT114/E?

A: No. FOD817 parts specify Moisture Sensitivity Level as Not Applicable, indicating no special moisture control requirements during storage or handling. Both part families are suitable for standard component storage and handling procedures.

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