MOC8104W Equivalent & Substitute Parts

Part Overview

The MOC8104W is a single-channel optoisolator with transistor output, rated for 5300Vrms isolation voltage. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new design implementations. The MOC8104W provides galvanic isolation in applications requiring high voltage separation with DC input control and transistor output switching capability.

Key Parameters

Parameter	Value
Manufacturer Part Number	MOC8104W
Manufacturer	onsemi
Category	Optoisolators
Number of Channels	1
Voltage - Isolation	5300Vrms
Current Transfer Ratio (Min)	160% @ 10mA
Current Transfer Ratio (Max)	256% @ 10mA
Output Type	Transistor
Voltage - Output (Max)	30V
Current - Output / Channel	50mA
Vce Saturation (Max)	400mV
Operating Temperature	-55°C ~ 100°C
Package / Case	6-DIP (0.400", 10.16mm)
Mounting Type	Through Hole
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the MOC8104W is determined by the following critical parameters:

Isolation Voltage: 5300Vrms minimum requirement
Number of Channels: Single channel configuration
Output Type: Transistor output
Current Transfer Ratio: 160% minimum @ 10mA
Maximum Output Current: 50mA per channel
Vce Saturation: 400mV maximum
Operating Temperature Range: -55°C to 100°C
Package Type: 6-DIP through-hole mounting
Input Type: DC

The substitute parts MOC8104-X016 and MOC8104G meet these core electrical and mechanical requirements, enabling direct functional replacement in applications designed for the MOC8104W.

Parameter Comparison

Parameter	MOC8104W (Main)	MOC8104-X016 (Substitute)	MOC8104G (Substitute)
Manufacturer	onsemi	Vishay Semiconductor Opto Division	Isocom Components 2004 LTD
Number of Channels	1	1	1
Voltage - Isolation	5300Vrms	5300Vrms	7.5Vpk
Current Transfer Ratio (Min)	160% @ 10mA	160% @ 10mA	Not specified
Current Transfer Ratio (Max)	256% @ 10mA	256% @ 10mA	Not specified
Output Type	Transistor	Transistor	Transistor
Voltage - Output (Max)	30V	30V	30V
Current - Output / Channel	50mA	50mA	50mA
Vce Saturation (Max)	400mV	400mV	400mV
Operating Temperature	-55°C ~ 100°C	-55°C ~ 100°C	-55°C ~ 100°C
Package / Case	6-DIP (0.400", 10.16mm)	6-DIP (0.300", 7.62mm)	6-DIP (0.400", 10.16mm)
Mounting Type	Through Hole	Through Hole	Through Hole
Product Status	Obsolete	Active	Active

Engineering Selection Recommendations

MOC8104-X016 (Vishay Semiconductor Opto Division): This substitute maintains identical isolation voltage (5300Vrms) and current transfer ratio specifications (160%-256% @ 10mA). The part is currently in active production status with ROHS3 compliance certification. The 6-DIP package dimension differs slightly (0.300" vs 0.400"), which may require PCB layout verification for through-hole mounting compatibility. This part is suitable for applications where the reduced package height is acceptable or beneficial.

MOC8104G (Isocom Components 2004 LTD): This substitute provides equivalent output specifications (30V maximum, 50mA per channel, 400mV Vce saturation) and maintains the same 6-DIP package dimensions (0.400", 10.16mm) as the original MOC8104W. The part is in active production with ROHS3 compliance. The isolation voltage specification differs (7.5Vpk versus 5300Vrms), and current transfer ratio data is not provided. This part is suitable for applications where the original package footprint must be preserved and isolation voltage requirements are met by the specified rating.

Both substitute parts are REACH Unaffected and carry EAR99 ECCN classification, matching the regulatory status of the original component.

Frequently Asked Questions (FAQ)

Q: Can MOC8104-X016 be used as a direct pin-for-pin replacement for MOC8104W?

A: MOC8104-X016 maintains identical electrical specifications and 6-DIP through-hole package type. However, the package body height differs (0.300" versus 0.400"), which may affect PCB clearance and mounting considerations. Verify PCB layout compatibility before implementation.

Q: What is the key difference between MOC8104-X016 and MOC8104G?

A: MOC8104-X016 maintains the exact isolation voltage specification of 5300Vrms and provides documented current transfer ratio data. MOC8104G specifies 7.5Vpk isolation voltage and does not provide current transfer ratio specifications. Both maintain equivalent output current and saturation voltage ratings.

Q: Are both substitute parts suitable for high-voltage isolation applications?

A: MOC8104-X016 is rated for 5300Vrms isolation, matching the original MOC8104W specification. MOC8104G is rated for 7.5Vpk isolation, which represents a different isolation voltage specification. Application requirements must determine which isolation rating is appropriate.

Q: What compliance certifications apply to the substitute parts?

A: MOC8104-X016 and MOC8104G both carry ROHS3 compliance certification and are REACH Unaffected. Both are classified as EAR99 for export control purposes, matching the regulatory status of the MOC8104W.

Q: Can the substitute parts operate across the same temperature range as MOC8104W?

A: Both MOC8104-X016 and MOC8104G are rated for -55°C to 100°C operating temperature, matching the MOC8104W specification.

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