6N139S(TB) Optoisolator Equivalent & Substitute Parts

Part Overview

The 6N139S(TB) is an optoisolator with Darlington output and integrated base connection, manufactured by Everlight Electronics Co Ltd. This component provides 5000Vrms isolation voltage in a single-channel configuration with 8-SMD surface mount packaging. The part is currently in active production status with 1101 pieces available in new original stock. Equivalent substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity when the primary part number becomes unavailable or when alternative packaging formats are required.

Substiute Parts

6N139S(TB)

Everlight Electronics Co LtdIn Stock: 11786N139S(TB) Datasheet

Current PartRFQ

6N139S(TA)

Everlight Electronics Co LtdIn Stock: 34356N139S(TA) Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 6N139S(TB) are identified based on strict electrical and mechanical parameter equivalence. The following parameters determine substitution eligibility:

Critical Electrical Parameters:

• Voltage - Isolation: 5000Vrms
• Number of Channels: 1
• Current Transfer Ratio (Min): 500% @ 1.6mA
• Output Type: Darlington with Base
• Voltage - Output (Max): 18V
• Current - Output / Channel: 60mA
• Voltage - Forward (Vf) (Typ): 1.3V
• Current - DC Forward (If) (Max): 20mA
• Operating Temperature: -40°C ~ 85°C

Critical Mechanical Parameters:

• Mounting Type: Surface Mount
• Package / Case: 8-SMD, Gull Wing
• Input Type: DC

Compliance Parameters:

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Substitute parts must match all critical electrical and mechanical parameters. Packaging format variations (such as Tape & Reel versus bulk packaging) do not affect functional equivalence and are permitted substitutions.

Parameter Comparison

Engineering Selection Recommendations

The 6N139S(TA) is a direct functional equivalent to the 6N139S(TB). Both parts are manufactured by Everlight Electronics Co Ltd and share identical electrical specifications, isolation voltage rating, output characteristics, and thermal operating range. Both components are ROHS3 compliant and carry MSL Level 1 (Unlimited) moisture sensitivity classification, indicating equivalent reliability and environmental performance.

The primary difference between these parts is packaging format: the 6N139S(TB) is supplied in bulk packaging, while the 6N139S(TA) is supplied in Tape & Reel (TR) format. This distinction affects only procurement and assembly logistics, not component performance or circuit functionality.

Selection between these equivalent parts should be based on:

1. Inventory Availability: The 6N139S(TA) currently has 3414 pieces in stock compared to 1101 pieces for the 6N139S(TB).
2. Packaging Requirements: Choose Tape & Reel format for automated assembly processes; choose bulk format for manual assembly or small-volume applications.
3. Supply Chain Continuity: Either part may be selected as a primary or secondary source without functional impact.

Both parts maintain active production status and are suitable for new designs and production applications.

Frequently Asked Questions (FAQ)

Q: Can the 6N139S(TA) be used as a direct replacement for the 6N139S(TB) in existing designs?

A: Yes. The 6N139S(TA) is electrically and mechanically equivalent to the 6N139S(TB). All critical parameters including isolation voltage, output current, switching time, and operating temperature range are identical. The parts are interchangeable at the circuit level.

Q: What is the difference between the 6N139S(TB) and 6N139S(TA)?

A: The only difference is packaging format. The 6N139S(TB) is supplied in bulk packaging, while the 6N139S(TA) is supplied in Tape & Reel (TR) format. Both contain the same optoisolator component with identical electrical specifications.

Q: Are both parts ROHS compliant?

A: Yes. Both the 6N139S(TB) and 6N139S(TA) are ROHS3 compliant and carry MSL Level 1 (Unlimited) moisture sensitivity rating.

Q: Which part should I select for automated assembly?

A: The 6N139S(TA) in Tape & Reel format is optimized for automated pick-and-place assembly processes. The 6N139S(TB) in bulk packaging is suitable for manual assembly or lower-volume applications.

Q: Do these parts have the same isolation voltage rating?

A: Yes. Both parts provide 5000Vrms isolation voltage and are rated for identical maximum output voltage (18V) and output current (60mA).

Q: What is the current transfer ratio for these optoisolators?

A: Both parts have a minimum current transfer ratio of 500% at 1.6mA input current, ensuring reliable switching performance across the specified operating range.

Q: Are there any temperature operating differences between these parts?

A: No. Both parts operate across the identical temperature range of -40°C to 85°C.