MOC8101G Equivalent & Substitute Parts

Part Overview

The MOC8101G is an optoisolator with transistor output manufactured by Isocom Components 2004 LTD. This component provides electrical isolation between input and output circuits using a 6-pin DIP package. The part is currently active in production with 953 units in stock. Alternative part numbers exist within the same product family to accommodate different sourcing requirements, inventory availability, and application-specific parameter variations.

Substiute Parts

MOC8101G

Isocom Components 2004 LTDIn Stock: 991MOC8101G Datasheet

Current PartRFQ

MOC8101

Vishay Semiconductor Opto DivisionIn Stock: 18232MOC8101 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The MOC8101 from Vishay Semiconductor Opto Division qualifies as a substitute for the MOC8101G based on the following critical parameters:

• Single Channel Transistor Output: Both parts feature identical output configuration (1 channel, transistor output)
• Maximum Output Voltage: Both rated at 30V maximum
• Output Current Capacity: Both support 50mA per channel
• Saturation Voltage: Both specify 400mV maximum Vce saturation
• Operating Temperature Range: Both operate across -55°C to 100°C
• Package Type: Both use 6-DIP through-hole mounting
• Compliance: Both are ROHS3 compliant and REACH unaffected
• Input Type: Both accept DC input

The primary difference lies in isolation voltage specification: the Isocom part specifies 7.5Vpk isolation, while the Vishay part specifies 5300Vrms isolation. These represent different measurement standards for the same functional characteristic.

Parameter Comparison

Engineering Selection Recommendations

Both the MOC8101G and MOC8101 are active production parts with ROHS3 compliance and REACH unaffected status, making them suitable for current design implementations. Selection between these parts should be based on:

• Inventory Availability: MOC8101G has 953 units in stock; MOC8101 has 18,125 units in stock
• Package Dimensions: MOC8101G uses 0.400" (10.16mm) pitch; MOC8101 uses 0.300" (7.62mm) pitch. PCB layout compatibility must be verified before substitution
• Forward Voltage Characteristics: MOC8101G specifies 1.15V typical forward voltage; MOC8101 specifies 1.25V typical. Input circuit design must accommodate this 0.10V difference
• Isolation Voltage Specification: Verify that the isolation voltage rating of the selected part meets application requirements

Frequently Asked Questions (FAQ)

Q: Can MOC8101 (Vishay) directly replace MOC8101G (Isocom) on existing PCBs?

A: Physical substitution requires verification of package pitch compatibility. The MOC8101G uses 0.400" (10.16mm) pitch while MOC8101 uses 0.300" (7.62mm) pitch. PCB footprints must match before substitution.

Q: What is the difference between 7.5Vpk and 5300Vrms isolation ratings?

A: These represent different measurement standards for isolation voltage. Both parts provide electrical isolation between input and output circuits. Application requirements determine which specification is relevant.

Q: Are both parts suitable for new designs?

A: Both MOC8101G and MOC8101 are active production parts with current compliance certifications (ROHS3, REACH unaffected), making them suitable for new designs.

Q: What are the key electrical parameters that must match for substitution?

A: Critical matching parameters include: single channel configuration, transistor output type, 30V maximum output voltage, 50mA output current capacity, 400mV maximum saturation voltage, and -55°C to 100°C operating temperature range.

Q: How do the input characteristics differ between these parts?

A: Both parts accept DC input. The MOC8101G specifies 1.15V typical forward voltage with 60mA maximum DC forward current. The MOC8101 specifies 1.25V typical forward voltage with 60mA maximum DC forward current. Input circuit design must account for this 0.10V difference in forward voltage.