MOC8103SD Optoisolator Equivalent & Substitute Parts

Part Overview

The MOC8103SD is a 6-SMD surface mount optoisolator with transistor output, rated for 5300Vrms isolation voltage. Manufactured by onsemi, this component is classified as obsolete, necessitating identification of functionally equivalent alternatives for new designs and production continuity. The MOC8103SD serves applications requiring galvanic isolation with single-channel transistor output capability.

Key Parameters

Parameter	MOC8103SD
Manufacturer	onsemi
Category	Optoisolators
Product Status	Obsolete
Number of Channels	1
Voltage - Isolation	5300Vrms
Current Transfer Ratio (Min)	108% @ 10mA
Current Transfer Ratio (Max)	173% @ 10mA
Output Type	Transistor
Voltage - Output (Max)	30V
Current - Output / Channel	50mA
Vce Saturation (Max)	400mV
Operating Temperature	-55°C ~ 100°C
Mounting Type	Surface Mount
Package / Case	6-SMD, Gull Wing
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the MOC8103SD is determined by the following critical parameters:

Single-channel transistor output optoisolator architecture
6-SMD surface mount package with gull wing leads
Isolation voltage rating (minimum 5300Vrms for direct substitution)
Maximum output voltage of 30V
Output current capability of 50mA per channel
Vce saturation specification of 400mV maximum
Operating temperature range compatibility (-55°C to 100°C minimum)
Input type: DC
Moisture sensitivity level MSL 1

The substitute parts identified maintain compatibility across these core electrical and mechanical parameters, enabling functional replacement in existing circuit designs.

Parameter Comparison

Parameter	MOC8103SD (onsemi)	MOC8103SM (Isocom)	MOC8103SMT&R (Isocom)	CNY17F3SR2M (onsemi)
Product Status	Obsolete	Active	Active	Active
Number of Channels	1	1	1	1
Voltage - Isolation	5300Vrms	7.5Vpk	7.5Vpk	4170Vrms
Output Type	Transistor	Transistor	Transistor	Transistor
Voltage - Output (Max)	30V	30V	30V	70V
Current - Output / Channel	50mA	50mA	50mA	50mA
Vce Saturation (Max)	400mV	400mV	400mV	400mV
Operating Temperature	-55°C ~ 100°C	-55°C ~ 100°C	-55°C ~ 100°C	-40°C ~ 100°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	6-SMD, Gull Wing	6-SMD, Gull Wing	6-SMD, Gull Wing	6-SMD, Gull Wing
Packaging Format	-	Tube	Tape & Reel (TR)	Tape & Reel (TR)
RoHS Status	-	ROHS3 Compliant	ROHS3 Compliant	-
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

MOC8103SM and MOC8103SMT&R (Isocom Components 2004 LTD) are active product alternatives with identical mechanical packaging and electrical output specifications. Both variants maintain the 6-SMD gull wing package, 30V maximum output voltage, 50mA output current, and 400mV Vce saturation. Both are ROHS3 compliant and REACH unaffected. The primary distinction is packaging format: MOC8103SM is supplied in tube format, while MOC8103SMT&R is supplied in tape and reel format for automated assembly.

CNY17F3SR2M (onsemi) is an active product alternative with compatible mechanical packaging and output specifications. This part maintains the 6-SMD gull wing package, 50mA output current, and 400mV Vce saturation. The CNY17F3SR2M offers higher maximum output voltage (70V versus 30V) and is supplied in tape and reel format. The isolation voltage rating of 4170Vrms is lower than the MOC8103SD specification of 5300Vrms; this part is suitable for applications where the lower isolation rating is acceptable.

Frequently Asked Questions (FAQ)

Q: Can MOC8103SM or MOC8103SMT&R directly replace MOC8103SD in existing designs?

A: Yes. Both Isocom variants maintain identical mechanical packaging (6-SMD gull wing), output voltage rating (30V maximum), output current (50mA), and saturation voltage (400mV). The primary difference is packaging format (tube versus tape and reel). Both are active products with ROHS3 compliance.

Q: What is the difference between MOC8103SM and MOC8103SMT&R?

A: Both parts are functionally identical. MOC8103SM is supplied in tube packaging for manual handling and lower-volume applications. MOC8103SMT&R is supplied in tape and reel format for automated pick-and-place assembly and higher-volume production.

Q: Is CNY17F3SR2M a suitable replacement for MOC8103SD?

A: CNY17F3SR2M is mechanically and electrically compatible for most applications. The 6-SMD gull wing package, 50mA output current, and 400mV saturation voltage match the MOC8103SD. However, the isolation voltage rating is 4170Vrms compared to 5300Vrms for the MOC8103SD. This part is suitable only for applications where the lower isolation rating meets design requirements.

Q: What are the key parameters that determine substitution compatibility?

A: Substitution compatibility is determined by: single-channel transistor output architecture, 6-SMD surface mount package, maximum output voltage of 30V (or higher), 50mA output current capability, 400mV maximum Vce saturation, and operating temperature range of -55°C to 100°C minimum. Isolation voltage rating must meet or exceed circuit requirements.

Q: Are all substitute parts ROHS3 compliant?

A: MOC8103SM and MOC8103SMT&R are ROHS3 compliant. CNY17F3SR2M RoHS status is not specified in available documentation. All three parts are REACH unaffected.

Q: What is the inventory status of these substitute parts?

A: MOC8103SM has 1072 pieces in stock. MOC8103SMT&R has 862 pieces in stock. CNY17F3SR2M has 12890 pieces in stock. All are listed as new original inventory.

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