6N135 Optoisolator Equivalent & Substitute Parts

Part Overview

The 6N135 is an optoisolator transistor with base output manufactured by Everlight Electronics Co Ltd, designed for high-voltage isolation applications. This component provides 5000Vrms isolation voltage in a single-channel configuration with transistor output and base connection. The part is currently in active production status with 12400 units in stock.

Substitute parts are necessary when the original manufacturer discontinues production, when alternative sourcing improves supply chain resilience, or when application requirements permit operation within relaxed electrical parameters while maintaining functional compatibility.

Substiute Parts

6N135

Everlight Electronics Co LtdIn Stock: 124426N135 Datasheet

Current PartRFQ

HCPL-4562-000E

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

SimilarRFQ

6N135

Fairchild SemiconductorIn Stock: 124296N135 Datasheet

Parametric EquivalentRFQ

6N135

Fairchild SemiconductorIn Stock: 124296N135 Datasheet

Parametric EquivalentRFQ

6N135

Fairchild SemiconductorIn Stock: 124296N135 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 6N135 optoisolator is determined by the following critical parameters:

Mandatory Compatibility Criteria:

• Package type: 8-DIP (0.300", 7.62mm) through-hole configuration
• Output configuration: Transistor with base connection
• Input type: DC
• Number of channels: 1
• Mounting type: Through hole

Electrical Performance Criteria:

• Isolation voltage rating must equal or exceed 5000Vrms
• Maximum output voltage: 20V
• Output current per channel: 8mA
• Forward voltage and forward current ratings must accommodate application requirements

Substitute parts are grouped into two categories: Parametric Equivalents (matching all critical electrical specifications) and Functional Alternatives (meeting core isolation and output requirements with relaxed electrical parameters).

Parameter Comparison

Engineering Selection Recommendations

6N135 (Everlight Electronics Co Ltd) - Primary Selection

The Everlight 6N135 is the recommended primary component. It maintains active production status, full ROHS3 compliance, and complete parametric alignment with the original specification. Current inventory of 12400 units supports immediate availability.

6N135 (Fairchild Semiconductor) - Parametric Equivalent with Restrictions

The Fairchild 6N135 provides identical electrical specifications including 5000Vrms isolation voltage, current transfer ratio range (7%-50%), and operating temperature range (-55°C ~ 100°C). However, this part is obsolete and RoHS non-compliant. Selection of this substitute is restricted to applications where RoHS compliance is not required and where component obsolescence presents no supply chain risk.

HCPL-4562-000E (Broadcom Limited) - Functional Alternative with Parameter Derating

The Broadcom HCPL-4562-000E operates as a functional alternative when isolation voltage requirements can be reduced from 5000Vrms to 3750Vrms. This part maintains identical package configuration (8-DIP through-hole), output type (transistor with base), and maximum output specifications (20V, 8mA). The operating temperature range is narrower (-40°C ~ 85°C versus -55°C ~ 100°C), and forward current rating is reduced (12mA maximum versus 25mA). This substitute is suitable only for applications where the lower isolation voltage and narrower temperature range are acceptable. Broadcom HCPL-4562-000E maintains active production status and ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can the HCPL-4562-000E replace the 6N135 in all applications?

A: No. The HCPL-4562-000E operates at 3750Vrms isolation voltage compared to the 6N135's 5000Vrms rating. Substitution is valid only when application isolation requirements do not exceed 3750Vrms. Additionally, the operating temperature range is narrower (-40°C ~ 85°C versus -55°C ~ 100°C), and maximum forward current is reduced (12mA versus 25mA). Verify that your application requirements fall within these reduced specifications before selecting this substitute.

Q: Is the Fairchild 6N135 a viable substitute?

A: The Fairchild 6N135 provides identical electrical specifications to the Everlight 6N135. However, it is obsolete and RoHS non-compliant. Use this substitute only in applications where RoHS compliance is not mandated and where component obsolescence does not create supply chain risk. For new designs or applications requiring RoHS compliance, select the Everlight 6N135 or evaluate the Broadcom HCPL-4562-000E if isolation voltage can be reduced.

Q: What are the key differences between these optoisolators?

A: All three parts share identical 8-DIP through-hole packaging and transistor-with-base output configuration. The primary differences are: isolation voltage (5000Vrms for Everlight and Fairchild; 3750Vrms for Broadcom), product status (active for Everlight and Broadcom; obsolete for Fairchild), RoHS compliance (compliant for Everlight and Broadcom; non-compliant for Fairchild), and operating temperature range (Broadcom is narrower at -40°C ~ 85°C).

Q: Can I use these parts interchangeably on the same PCB?

A: Yes, all three parts use identical 8-DIP (0.300", 7.62mm) through-hole packaging and are mechanically interchangeable on the PCB. However, electrical compatibility must be verified. The Broadcom HCPL-4562-000E requires confirmation that application isolation voltage requirements do not exceed 3750Vrms and that operating temperature range (-40°C ~ 85°C) is acceptable.

Q: Which substitute should I select for a new design?

A: For new designs, select the Everlight 6N135. It maintains active production status, full ROHS3 compliance, and complete parametric alignment with standard 5000Vrms isolation requirements. The Broadcom HCPL-4562-000E is suitable only if isolation voltage can be reduced to 3750Vrms and temperature range can be narrowed to -40°C ~ 85°C. The Fairchild 6N135 is not recommended for new designs due to obsolescence and RoHS non-compliance.

Q: What parameters must match for successful substitution?

A: Critical parameters that must match or exceed the 6N135 specification are: package type (8-DIP through-hole), output configuration (transistor with base), number of channels (1), maximum output voltage (20V), and output current (8mA). Isolation voltage must equal or exceed 5000Vrms unless application requirements permit reduction. Operating temperature range must encompass the application's thermal requirements.