PS2503-1 Optoisolator Equivalent & Substitute Parts

Part Overview

The PS2503-1 is a 5000Vrms isolation optoisolator with transistor output in 4-DIP package configuration, manufactured by CEL. This component provides galvanic isolation for DC input signals with single-channel transistor output capability. The PS2503-1 is classified as obsolete product status, necessitating identification of active equivalent alternatives from current manufacturers to maintain design continuity and ensure long-term supply chain reliability.

Substiute Parts

PS2503-1

CELIn Stock: 4568PS2503-1 Datasheet

Current PartRFQ

PS2503-1-K-A

Renesas Electronics CorporationIn Stock: 1042PS2503-1-K-A Datasheet

SimilarRFQ

PS2503-1-L-A

Renesas Electronics CorporationIn Stock: 990PS2503-1-L-A Datasheet

SimilarRFQ

PS2503-1-M-A

Renesas Electronics CorporationIn Stock: 1209PS2503-1-M-A Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PS2503-1 optoisolator is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Isolation voltage: 5000Vrms
• Number of channels: 1
• Output type: Transistor
• Package type: 4-DIP (0.300", 7.62mm)
• Mounting type: Through Hole
• Maximum output voltage: 40V
• Output current per channel: 30mA
• Operating temperature range: -55°C ~ 100°C
• Rise / Fall time: 20µs, 30µs

Allowable Variation Parameters:

• Current Transfer Ratio (Min): Substitute must meet or exceed the application requirement
• Current Transfer Ratio (Max): Substitute specifications within the range 200% to 400% @ 1mA are acceptable
• Vce Saturation (Max): 250mV maximum
• Voltage - Forward (Vf) (Typ): 1.1V
• Current - DC Forward (If) (Max): 80mA

All substitute parts listed are manufactured by Renesas Electronics Corporation under the NEPOC series with active product status and ROHS3 compliance.

Parameter Comparison

Engineering Selection Recommendations

PS2503-1-K-A (Renesas Electronics Corporation)

The PS2503-1-K-A provides the highest current transfer ratio specification with minimum 200% @ 1mA and maximum 400% @ 1mA. This variant is suitable for applications requiring enhanced optical coupling efficiency. Active product status ensures ongoing availability and supply chain support. ROHS3 compliance satisfies modern environmental and regulatory requirements.

PS2503-1-L-A (Renesas Electronics Corporation)

The PS2503-1-L-A offers intermediate current transfer ratio performance with minimum 150% @ 1mA and maximum 300% @ 1mA. This variant balances coupling efficiency with component characteristics. Active product status and ROHS3 compliance provide regulatory alignment and long-term procurement stability.

PS2503-1-M-A (Renesas Electronics Corporation)

The PS2503-1-M-A matches the original PS2503-1 minimum current transfer ratio specification at 100% @ 1mA with maximum 200% @ 1mA. This variant provides direct functional equivalence to the obsolete original component. Active product status and ROHS3 compliance ensure regulatory compliance and supply continuity.

All three Renesas alternatives maintain identical electrical performance across isolation voltage, output voltage, output current, operating temperature range, and switching characteristics. Selection between variants depends on application-specific current transfer ratio requirements and coupling efficiency margins.

Frequently Asked Questions (FAQ)

Q: Can PS2503-1-K-A, PS2503-1-L-A, and PS2503-1-M-A be used interchangeably with PS2503-1?

A: All three Renesas variants are electrically and mechanically equivalent to the PS2503-1 across all critical parameters including isolation voltage, package type, output specifications, and operating temperature range. Selection depends on current transfer ratio requirements specific to the application circuit.

Q: What is the difference between the three substitute part numbers?

A: The primary difference is the current transfer ratio specification. PS2503-1-K-A specifies 200-400%, PS2503-1-L-A specifies 150-300%, and PS2503-1-M-A specifies 100-200% @ 1mA. All other electrical and mechanical parameters remain identical.

Q: Are the substitute parts pin-compatible with the original PS2503-1?

A: Yes. All substitute parts use the 4-DIP (0.300", 7.62mm) package with through-hole mounting, providing direct pin compatibility and PCB footprint equivalence with the PS2503-1.

Q: What is the significance of ROHS3 compliance on the substitute parts?

A: ROHS3 compliance indicates the substitute parts meet current environmental and hazardous substance restrictions. The original PS2503-1 is RoHS non-compliant, making the Renesas alternatives necessary for applications subject to RoHS regulatory requirements.

Q: Can I use PS2503-1-M-A as a direct replacement for PS2503-1?

A: Yes. The PS2503-1-M-A matches the original minimum current transfer ratio of 100% @ 1mA and maintains all other electrical and mechanical specifications, providing direct functional replacement capability.

Q: What inventory availability exists for these substitute parts?

A: PS2503-1-K-A: 1012 Pcs, PS2503-1-L-A: 938 Pcs, PS2503-1-M-A: 1113 Pcs new original stock. The original PS2503-1 has 4545 Pcs available but is obsolete.

Q: Are there any thermal or environmental performance differences between the variants?

A: No. All variants maintain identical operating temperature range (-55°C ~ 100°C), moisture sensitivity level (MSL 1 - Unlimited), and thermal characteristics.