MOC8103 Equivalent & Substitute Parts

Part Overview

The MOC8103 is a 5300Vrms optoisolator with transistor output in 6-DIP packaging, designed for high-voltage isolation applications requiring single-channel DC input switching. The main part is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new designs. Substitute parts must maintain compatibility across isolation voltage, output type, package configuration, and operating temperature range to ensure functional equivalence in circuit applications.

Key Parameters

Parameter	MOC8103
Voltage - Isolation	5300Vrms
Number of Channels	1
Output Type	Transistor
Package / Case	6-DIP (0.300", 7.62mm)
Voltage - Output (Max)	30V
Current - Output / Channel	50mA
Operating Temperature	-55°C ~ 100°C
Mounting Type	Through Hole
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters:

Isolation Voltage: Substitute parts must meet or exceed 5300Vrms to maintain isolation performance
Package Type: All substitutes must use 6-DIP (0.300", 7.62mm) through-hole configuration for mechanical compatibility
Output Type: Transistor output is required; transistor with base output represents a functional superset
Operating Temperature Range: Must encompass or match the -55°C ~ 100°C specification
Current - Output / Channel: Must support minimum 50mA output current
Voltage - Output (Max): Must support minimum 30V output voltage

Based on these criteria, the following parts qualify as substitutes:

MOC8103-X001 (onsemi/Vishay): Identical isolation voltage, output specifications, and temperature range; active product status
CNY17-3-000E (Broadcom): 5000Vrms isolation (within acceptable range), transistor with base output (functional superset), active status
CNY17F3M (onsemi): 4170Vrms isolation (below specification threshold); included in original substitute list but does not meet isolation voltage requirement

Parameter Comparison

Parameter	MOC8103	MOC8103-X001	CNY17-3-000E	CNY17F3M
Manufacturer	onsemi	Vishay Semiconductor Opto Division	Broadcom Limited	onsemi
Voltage - Isolation	5300Vrms	5300Vrms	5000Vrms	4170Vrms
Number of Channels	1	1	1	1
Output Type	Transistor	Transistor	Transistor with Base	Transistor
Package / Case	6-DIP (0.300", 7.62mm)	6-DIP (0.300", 7.62mm)	6-DIP (0.300", 7.62mm)	6-DIP (0.300", 7.62mm)
Voltage - Output (Max)	30V	30V	70V	70V
Current - Output / Channel	50mA	50mA	150mA	50mA
Operating Temperature	-55°C ~ 100°C	-55°C ~ 100°C	-55°C ~ 100°C	-40°C ~ 100°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Product Status	Obsolete	Active	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitute: MOC8103-X001

MOC8103-X001 is the direct equivalent with identical electrical specifications and operating parameters. It maintains 5300Vrms isolation voltage, 30V maximum output voltage, and 50mA output current. The part is active and ROHS3 compliant, providing long-term availability and regulatory compliance for new designs.

Secondary Substitute: CNY17-3-000E

CNY17-3-000E provides 5000Vrms isolation (300V below specification) with enhanced output capabilities (70V maximum, 150mA output current). The transistor with base output configuration offers additional circuit design flexibility. This part is active and ROHS3 compliant. Selection requires confirmation that 5000Vrms isolation meets application requirements.

Not Recommended: CNY17F3M

CNY17F3M isolation voltage of 4170Vrms falls below the 5300Vrms specification and does not meet substitution criteria for this application.

Frequently Asked Questions (FAQ)

Q: Can MOC8103-X001 be used as a direct replacement for MOC8103?

A: Yes. MOC8103-X001 maintains identical isolation voltage (5300Vrms), output voltage (30V maximum), output current (50mA), and operating temperature range (-55°C ~ 100°C). Pin configuration and 6-DIP package are compatible. The part is active and ROHS3 compliant.

Q: What is the minimum isolation voltage acceptable for substitution?

A: The MOC8103 specifies 5300Vrms isolation. Substitute parts must meet or exceed this voltage to maintain isolation performance. CNY17-3-000E at 5000Vrms falls 300V below specification and requires application-level verification.

Q: Does CNY17-3-000E's transistor with base output affect compatibility?

A: Transistor with base output is a functional superset of standard transistor output. The base connection provides additional circuit design options but does not prevent direct substitution in applications using only collector and emitter connections. Pin configuration remains compatible within 6-DIP packaging.

Q: Why is CNY17F3M listed in the original substitute list if it does not meet isolation voltage requirements?

A: CNY17F3M is included in the original part documentation but does not satisfy the isolation voltage criterion (4170Vrms vs. 5300Vrms required). It is not recommended for direct substitution in applications requiring 5300Vrms isolation.

Q: Are there temperature range limitations when substituting?

A: MOC8103 operates -55°C ~ 100°C. MOC8103-X001 matches this range exactly. CNY17-3-000E also supports -55°C ~ 100°C. CNY17F3M operates -40°C ~ 100°C, which does not extend to -55°C and is unsuitable for applications requiring full temperature range coverage.

Q: What compliance certifications should be verified for new designs?

A: MOC8103-X001 and CNY17-3-000E are both ROHS3 compliant. All parts carry REACH Unaffected and EAR99 ECCN classifications. Verify compliance requirements for your specific application and regulatory jurisdiction.

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