PS2505-4 Equivalent & Substitute Parts

Part Overview

The PS2505-4 is a 4-channel optoisolator with transistor output rated for 5000Vrms isolation voltage in a 16-DIP package. This component is classified as Obsolete, making it necessary to identify functionally equivalent alternatives for ongoing circuit designs and repairs. Substitute parts must maintain compatibility across key electrical parameters including isolation voltage, channel count, output type, and physical package format.

Key Parameters

Parameter	PS2505-4
Manufacturer	CEL
Number of Channels	4
Voltage - Isolation	5000Vrms
Current Transfer Ratio (Min)	80% @ 5mA
Current Transfer Ratio (Max)	600% @ 5mA
Output Type	Transistor
Voltage - Output (Max)	80V
Current - Output / Channel	50mA
Vce Saturation (Max)	300mV
Operating Temperature	-55°C ~ 100°C
Package / Case	16-DIP (0.300", 7.62mm)
Mounting Type	Through Hole
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitute parts for the PS2505-4 are categorized based on compatibility with the following key parameters: 4-channel configuration, 5000Vrms isolation voltage minimum, transistor output type, 50mA output current per channel, 16-DIP package format, and through-hole mounting.

Direct Substitutes maintain identical or equivalent electrical specifications and the same through-hole DIP package:

PS2505-4-A (Renesas Electronics): Identical specifications, ROHS3 compliant, tube packaging
OCP-PCT4216/A (Lumex Opto/Components): 5000Vrms isolation, 4-channel, transistor output, 16-DIP through-hole, ROHS3 compliant

Similar Alternatives provide compatible functionality with minor parameter variations:

ILQ620GB (Vishay): 5300Vrms isolation (exceeds requirement), 4-channel, transistor output, 16-DIP through-hole, ROHS3 compliant
OCP-PCT4216/A-TR (Lumex Opto/Components): Same electrical specifications as OCP-PCT4216/A but surface-mount package (16-SMD); suitable only for designs accepting SMD conversion

Parameter Comparison

Parameter	PS2505-4	PS2505-4-A	OCP-PCT4216/A	ILQ620GB	OCP-PCT4216/A-TR
Manufacturer	CEL	Renesas Electronics	Lumex Opto/Components	Vishay Semiconductor Opto	Lumex Opto/Components
Number of Channels	4	4	4	4	4
Voltage - Isolation	5000Vrms	5000Vrms	5000Vrms	5300Vrms	5000Vrms
Current Transfer Ratio (Min)	80% @ 5mA	80% @ 5mA	60% @ 1mA	100% @ 5mA	60% @ 1mA
Current Transfer Ratio (Max)	600% @ 5mA	600% @ 5mA	600% @ 1mA	600% @ 5mA	600% @ 1mA
Output Type	Transistor	Transistor	Transistor	Transistor	Transistor
Voltage - Output (Max)	80V	80V	60V	70V	60V
Current - Output / Channel	50mA	50mA	50mA	50mA	50mA
Vce Saturation (Max)	300mV	300mV	300mV	400mV	300mV
Operating Temperature	-55°C ~ 100°C	-55°C ~ 100°C	-30°C ~ 100°C	-55°C ~ 100°C	-30°C ~ 100°C
Package / Case	16-DIP (0.300", 7.62mm)	16-DIP (0.300", 7.62mm)	16-DIP (0.300", 7.62mm)	16-DIP (0.300", 7.62mm)	16-SMD, Gull Wing
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Surface Mount
Product Status	Obsolete	Not For New Designs	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For applications requiring active production support and regulatory compliance, OCP-PCT4216/A or ILQ620GB are preferred substitutes. Both are ROHS3 compliant and maintain active product status with full manufacturing support.

PS2505-4-A provides identical electrical specifications to the original PS2505-4 but carries a "Not For New Designs" classification, limiting its suitability for new development despite ROHS3 compliance and current inventory availability.

OCP-PCT4216/A-TR offers equivalent electrical performance in a surface-mount package for designs permitting PCB layout modification. This part maintains active status and ROHS3 compliance but requires SMD assembly capability.

Selection should be based on: product status requirements (active versus legacy), regulatory compliance needs (RoHS3), circuit board assembly method (through-hole versus surface-mount), and maximum output voltage tolerance (-20V reduction in OCP-PCT4216 variants and ILQ620GB compared to original specification).

Frequently Asked Questions (FAQ)

Q: Can OCP-PCT4216/A directly replace PS2505-4 on existing circuit boards? A: Yes. Both parts feature identical 16-DIP through-hole package format with the same 0.300" (7.62mm) pin spacing, enabling direct socket substitution without PCB modifications.

Q: What are the key differences between OCP-PCT4216/A and ILQ620GB? A: OCP-PCT4216/A specifies 5000Vrms isolation voltage, while ILQ620GB provides 5300Vrms. ILQ620GB has higher minimum current transfer ratio (100% @ 5mA versus 60% @ 1mA), superior Vce saturation performance (400mV maximum), but operates at reduced maximum output voltage (70V versus 80V). Both support 4-channel, 50mA per channel, and are ROHS3 compliant.

Q: Why does OCP-PCT4216/A show lower maximum output voltage than PS2505-4? A: OCP-PCT4216/A specifies 60V maximum output voltage compared to PS2505-4's 80V. Circuit designs must verify that this 20V reduction meets application requirements. ILQ620GB specifies 70V, providing intermediate capability.

Q: Is OCP-PCT4216/A-TR compatible with existing through-hole circuit boards? A: No. OCP-PCT4216/A-TR uses 16-SMD surface-mount packaging, requiring board redesign and SMD assembly capability. The DIP through-hole variants (PS2505-4-A and OCP-PCT4216/A) maintain direct compatibility.

Q: What is the significance of the PS2505-4-A "Not For New Designs" status? A: This classification indicates the manufacturer does not recommend the part for new product development. While functionally equivalent and ROHS3 compliant, it is intended for legacy system support only. OCP-PCT4216/A or ILQ620GB are preferred for new designs.

Q: How do the operating temperature ranges affect substitution? A: PS2505-4, PS2505-4-A, and ILQ620GB operate from -55°C to 100°C. OCP-PCT4216/A and OCP-PCT4216/A-TR operate from -30°C to 100°C. Applications requiring full -55°C operation must use PS2505-4-A or ILQ620GB as substitutes.

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