PS8501-AX Optoisolator Equivalent & Substitute Parts

Part Overview

The PS8501-AX is a high-voltage optoisolator transistor with base output manufactured by CEL, designed for 5000Vrms isolation applications in 8-DIP through-hole packaging. This component provides galvanic isolation for DC input signals with transistor output capability, supporting up to 8mA output current per channel.

The PS8501-AX has been discontinued at DiGi Electronics. Equivalent and substitute parts are available from active manufacturers including Renesas Electronics Corporation and Broadcom Limited, offering comparable or enhanced isolation performance in identical or compatible package configurations.

Substiute Parts

PS8501-AX

CELIn Stock: 1017PS8501-AX Datasheet

Current PartRFQ

HCPL-4562-000E

Broadcom LimitedIn Stock: 1751HCPL-4562-000E Datasheet

SimilarRFQ

PS8501-AX

Renesas Electronics CorporationIn Stock: 2012PS8501-AX Datasheet

Parametric EquivalentRFQ

PS8501-V-AX

Renesas Electronics CorporationIn Stock: 919PS8501-V-AX Datasheet

Parametric EquivalentRFQ

PS8502-V-AX

Renesas Electronics CorporationIn Stock: 2023PS8502-V-AX Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PS8501-AX is determined by the following critical parameters:

Primary Substitution Criteria:

• Voltage - Isolation: 5000Vrms (exact match required for high-voltage isolation applications)
• Number of Channels: 1 (single-channel configuration)
• Output Type: Transistor with Base (functional output topology)
• Package / Case: 8-DIP (0.300", 7.62mm) (mechanical and electrical compatibility)
• Mounting Type: Through Hole (PCB assembly compatibility)

Secondary Compatibility Parameters:

• Current - Output / Channel: 8mA (load capability)
• Voltage - Output (Max): 35V (output voltage rating)
• Current Transfer Ratio (Min): 15% @ 16mA (optical coupling efficiency)

Substitute parts are grouped into two categories:

Category 1: Parametric Equivalents — Parts matching all primary criteria and secondary parameters with identical or superior electrical specifications. These parts are direct functional replacements.

Category 2: Functional Substitutes — Parts meeting primary criteria but with reduced isolation voltage or modified secondary parameters. These parts require application-level verification of compatibility.

Parameter Comparison

Engineering Selection Recommendations

Tier 1: Direct Parametric Equivalents (Recommended Primary Substitutes)

The PS8501-AX manufactured by Renesas Electronics Corporation is a parametric equivalent offering identical electrical specifications to the discontinued CEL part. This component maintains 5000Vrms isolation voltage, 15% minimum current transfer ratio at 16mA, and 220ns/350ns turn-on/turn-off timing. Renesas product status is Active with 1990 units in stock. This part is suitable for direct replacement in existing designs without circuit modification.

The PS8501-V-AX and PS8502-V-AX from Renesas Electronics Corporation are parametric equivalents with identical isolation voltage, output voltage rating, and current specifications. Both parts maintain Active product status with adequate inventory (897 and 2001 units respectively). These parts are suitable for direct replacement applications.

Tier 2: Functional Substitute (Conditional Compatibility)

The HCPL-4562-000E manufactured by Broadcom Limited provides functional substitution with reduced isolation voltage (3750Vrms versus 5000Vrms) and reduced maximum output voltage (20V versus 35V). This part is suitable only for applications where the lower isolation voltage and output voltage ratings are acceptable. Broadcom product status is Active with 1700 units in stock. REACH status differs from the main part (Unaffected versus Affected).

Compliance Considerations:

All substitute parts maintain ROHS3 compliance and Moisture Sensitivity Level 1 (Unlimited). The PS8501-AX (Renesas), PS8501-V-AX, and PS8502-V-AX maintain REACH Affected status consistent with the original part. The HCPL-4562-000E is REACH Unaffected, which may require regulatory review in applications subject to REACH requirements.

Frequently Asked Questions (FAQ)

Q: Can the HCPL-4562-000E replace the PS8501-AX in all applications?

A: The HCPL-4562-000E is a functional substitute with reduced isolation voltage (3750Vrms versus 5000Vrms) and reduced maximum output voltage (20V versus 35V). Substitution is valid only if the application requirements do not exceed these reduced ratings. Applications requiring 5000Vrms isolation must use Tier 1 equivalents.

Q: Are the Renesas PS8501-AX, PS8501-V-AX, and PS8502-V-AX interchangeable?

A: Yes. All three Renesas parts maintain identical primary electrical specifications: 5000Vrms isolation, 8-DIP through-hole package, 8mA output current, and 35V maximum output voltage. All are suitable for direct replacement of the discontinued CEL PS8501-AX.

Q: What is the difference between the PS8501-V-AX and PS8502-V-AX?

A: Both parts share identical electrical specifications and package configuration. The base product numbers differ (PS8501 versus PS8502), but parametric performance is equivalent for substitution purposes.

Q: Does the operating temperature range affect substitution eligibility?

A: The HCPL-4562-000E operates over -40 to 85°C, while the PS8501-AX and Renesas equivalents operate over -55 to 100°C. If the application requires operation below -40°C or above 85°C, the HCPL-4562-000E is not suitable. Renesas parts maintain the full temperature range of the original part.

Q: Are all substitute parts available in through-hole 8-DIP packaging?

A: Yes. All substitute parts listed are available in 8-DIP (0.300", 7.62mm) through-hole package configuration, ensuring mechanical and electrical compatibility with existing PCB designs.

Q: What inventory levels are available for each substitute part?

A: Renesas PS8501-AX: 1990 units; Renesas PS8501-V-AX: 897 units; Renesas PS8502-V-AX: 2001 units; Broadcom HCPL-4562-000E: 1700 units. All parts are listed as New Original In Stock.

Q: Do the substitute parts maintain the same current transfer ratio performance?

A: The Renesas PS8501-AX, PS8501-V-AX, and PS8502-V-AX maintain the 15% minimum current transfer ratio at 16mA specification. The Broadcom HCPL-4562-000E does not specify current transfer ratio in the provided data, requiring application-level verification if this parameter is critical.