PS2501-4 Optoisolator - Equivalent & Substitute Parts

Part Overview

The PS2501-4 is a 4-channel optoisolator with transistor output, 5000Vrms isolation voltage, and 16-DIP packaging. This component is currently listed as Obsolete by the manufacturer (CEL). Given its obsolete status and the need for continued system support, identifying equivalent and substitute components is necessary to ensure design continuity and component availability for production and maintenance applications.

Substiute Parts

PS2501-4

CELIn Stock: 7573PS2501-4 Datasheet

Current PartRFQ

OCP-PCT4116/E

Lumex Opto/Components Inc.In Stock: 2407OCP-PCT4116/E Datasheet

DirectRFQ

PS2501-4-A

Renesas Electronics CorporationIn Stock: 10213PS2501-4-A Datasheet

DirectRFQ

ILQ621GB

Vishay Semiconductor Opto DivisionIn Stock: 4543ILQ621GB Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the PS2501-4 are evaluated based on the following critical parameters that determine functional compatibility:

Core Compatibility Criteria:

• Number of Channels: 4 (mandatory)
• Voltage - Isolation: 5000Vrms or higher
• Output Type: Transistor (mandatory)
• Package / Case: 16-DIP (0.300", 7.62mm) (mandatory)
• Mounting Type: Through Hole (mandatory)
• Current - Output / Channel: 50mA or greater
• Voltage - Output (Max): Must support application requirements
• Operating Temperature Range: Must cover application range
• Input Type: DC (mandatory)

The substitute parts identified are grouped into two categories based on their relationship to the original PS2501-4:

Direct Manufacturer Substitutes: Parts that share the same or equivalent electrical and mechanical specifications, including identical current transfer ratios and operating characteristics.

Similar Alternative: Parts that meet the core compatibility criteria with minor parameter variations that remain within acceptable tolerance for equivalent circuit operation.

Parameter Comparison

Engineering Selection Recommendations

PS2501-4-A (Renesas Electronics Corporation) This part is the direct successor from the original manufacturer's product line. It maintains identical electrical specifications to the PS2501-4, including current transfer ratio, operating temperature range, and output voltage characteristics. However, the PS2501-4-A is designated "Not For New Designs," indicating this is a legacy component. The part achieves ROHS3 compliance, unlike the original PS2501-4. Selection of this part is limited to legacy system maintenance where stock availability is required.

OCP-PCT4116/E (Lumex Opto/Components Inc.) This part is an active production component meeting 5000Vrms isolation requirements in 16-DIP packaging. It differs from the PS2501-4 in several parameters: minimum current transfer ratio is 60% (vs. 80%), maximum output voltage is 60V (vs. 80V), and operating temperature range is -30°C to 100°C (vs. -55°C to 100°C). These differences require design verification for specific applications. The component is ROHS3 compliant and actively produced, providing long-term supply security.

ILQ621GB (Vishay Semiconductor Opto Division) This part exceeds the original PS2501-4 specification in isolation voltage (5300Vrms vs. 5000Vrms) and current transfer ratio minimum (100% vs. 80%). It offers improved speed characteristics with 2µs rise and fall times. The Vce saturation is higher at 400mV (vs. 300mV) and maximum output voltage is 70V (vs. 80V). This component is ROHS3 compliant and in active production, suitable for new designs requiring enhanced isolation performance.

Frequently Asked Questions (FAQ)

Q: Can PS2501-4-A be used as a direct replacement for PS2501-4? A: Yes, for legacy systems. The PS2501-4-A maintains identical electrical specifications and pin compatibility. However, it is designated "Not For New Designs" by the manufacturer. For new product development, OCP-PCT4116/E or ILQ621GB are preferred alternatives.

Q: What are the key differences between OCP-PCT4116/E and the original PS2501-4? A: The OCP-PCT4116/E has a lower minimum current transfer ratio (60% vs. 80%), lower maximum output voltage (60V vs. 80V), and a narrower operating temperature range (-30°C to 100°C vs. -55°C to 100°C). Applications requiring the full temperature range or higher output voltage must evaluate circuit tolerance before substitution.

Q: Is ILQ621GB suitable for direct replacement in legacy designs? A: ILQ621GB meets all core compatibility criteria and exceeds isolation voltage specifications. The primary consideration is Vce saturation (400mV vs. 300mV), which affects switching speed and power dissipation in specific circuit topologies. Application-level verification is required for designs with tight saturation voltage margins.

Q: Are all substitute parts ROHS3 compliant? A: Yes, PS2501-4-A, OCP-PCT4116/E, and ILQ621GB are all ROHS3 compliant. The original PS2501-4 is not RoHS compliant, so compliance requirements for new production must consider the selected substitute.

Q: Which substitute part is recommended for new product designs? A: OCP-PCT4116/E and ILQ621GB are both in active production status. OCP-PCT4116/E provides cost-effective compatibility for standard applications. ILQ621GB is suitable when enhanced isolation voltage and improved switching speed are required.

Q: Do all substitute parts use the same 16-DIP package? A: Yes, all substitute parts use 16-DIP (0.300", 7.62mm) through-hole packaging, ensuring mechanical compatibility with existing PCB designs.