6N135 Optoisolator Equivalent & Substitute Parts

Part Overview

The 6N135 is a high-voltage optoisolator with transistor output and integrated base connection, designed for galvanic isolation applications requiring 5000Vrms isolation voltage. The main part (Isocom Components 2004 LTD) maintains active product status with full RoHS3 compliance and unlimited moisture sensitivity rating. The Fairchild Semiconductor variant listed as a substitute is obsolete and does not meet current RoHS compliance requirements, making equivalent part identification critical for new designs and production continuity.

Substiute Parts

6N135

Isocom Components 2004 LTDIn Stock: 124356N135 Datasheet

Current PartRFQ

6N135

Fairchild SemiconductorIn Stock: 124296N135 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

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

• Isolation voltage rating: 5000Vrms minimum
• Single-channel configuration with transistor output and base connection
• Current transfer ratio range: 7% to 50% @ 16mA input
• Maximum output voltage: 20V
• Output current capability: 8mA per channel
• Package: 8-DIP (0.300", 7.62mm) through-hole mounting
• Input type: DC
• Operating temperature range: -55°C to 100°C minimum

The Fairchild Semiconductor 6N135 variant meets all electrical and mechanical parameters but carries obsolete product status and lacks RoHS3 compliance, limiting its use to legacy system maintenance only.

Parameter Comparison

Engineering Selection Recommendations

For new designs and active production, the Isocom Components 2004 LTD 6N135 is the required selection. It maintains active product status, full RoHS3 compliance, and unlimited moisture sensitivity rating (MSL 1), meeting current regulatory and supply chain requirements.

The Fairchild Semiconductor 6N135 variant is electrically equivalent in core isolation and output parameters but is obsolete and RoHS non-compliant. This variant is suitable only for direct replacement in legacy systems where the original Fairchild part was specified and supply continuity is the primary concern. Timing characteristics differ (turn-on/turn-off times of 350ns versus 150ns/700ns), which may affect circuit performance in timing-critical applications.

For applications requiring active product status and regulatory compliance, no alternative to the Isocom 6N135 is presented in the provided substitute list.

Frequently Asked Questions (FAQ)

Q: Can the Fairchild 6N135 be used as a direct replacement in new designs?

A: No. The Fairchild variant is obsolete and RoHS non-compliant. New designs must use the active Isocom Components 6N135.

Q: Are there electrical differences between the Isocom and Fairchild variants?

A: Both meet the core isolation voltage (5000Vrms), output type (transistor with base), and current transfer ratio specifications. However, turn-on and turn-off times differ: Isocom specifies 150ns and 700ns respectively, while Fairchild specifies 350ns for both. This timing difference may affect circuit behavior in applications with strict timing requirements.

Q: What does RoHS3 compliance mean for the Isocom 6N135?

A: RoHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead, cadmium, mercury, and other hazardous materials. This is mandatory for most commercial and industrial applications in regulated markets.

Q: Is the 8-DIP package interchangeable between variants?

A: Yes. Both the Isocom and Fairchild 6N135 use the same 8-DIP (0.300", 7.62mm) through-hole package, ensuring mechanical and pin compatibility.

Q: What is MSL 1 (Unlimited) moisture sensitivity?

A: MSL 1 indicates the component has unlimited shelf life and requires no special moisture control during storage or handling, making it suitable for standard warehouse and production environments.