MCT210 Optoisolator Equivalent & Substitute Parts

Part Overview

The MCT210 is an optoisolator transistor with base output manufactured by onsemi, rated for 5300Vrms isolation voltage in a 6-DIP package. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations. The MCT210 provides galvanic isolation with a single-channel transistor output configuration suitable for DC input applications requiring high isolation voltage and moderate output current capability.

Key Parameters

Parameter	MCT210
Manufacturer	onsemi
Category	Optoisolators
Product Status	Obsolete
Number of Channels	1
Voltage - Isolation	5300Vrms
Current Transfer Ratio (Min)	150% @ 10mA
Output Type	Transistor with Base
Voltage - Output (Max)	30V
Current - Output / Channel	50mA
Vce Saturation (Max)	400mV
Operating Temperature	-55°C ~ 100°C
Package / Case	6-DIP (0.300", 7.62mm)
Mounting Type	Through Hole

Substitute Part Grouping Explanation

Substitution eligibility for the MCT210 is determined by the following critical parameters:

Isolation Voltage (5300Vrms): The primary electrical requirement. Substitute parts must meet or exceed this isolation rating.
Package Type (6-DIP): Physical and electrical compatibility requires identical or pin-compatible packaging.
Output Configuration (Transistor with Base): The output stage topology must match to ensure circuit compatibility.
Operating Temperature Range (-55°C ~ 100°C): Thermal operating envelope must be maintained.
Single Channel Configuration: The optoisolator must provide one isolated channel.

Based on these criteria, two substitute parts are identified:

4N35-000E (Broadcom Limited): Meets package and output type requirements but provides lower isolation voltage (3550Vrms), making it suitable only for applications with reduced isolation requirements.

SFH608-4 (Vishay Semiconductor Opto Division): Meets all critical parameters including 5300Vrms isolation voltage, 6-DIP package, transistor with base output, and identical operating temperature range.

Parameter Comparison

Parameter	MCT210	4N35-000E	SFH608-4
Manufacturer	onsemi	Broadcom Limited	Vishay Semiconductor Opto Division
Product Status	Obsolete	Active	Last Time Buy
Number of Channels	1	1	1
Voltage - Isolation	5300Vrms	3550Vrms	5300Vrms
Current Transfer Ratio (Min)	150% @ 10mA	100% @ 10mA	160% @ 1mA
Output Type	Transistor with Base	Transistor with Base	Transistor with Base
Voltage - Output (Max)	30V	30V	55V
Current - Output / Channel	50mA	100mA	50mA
Vce Saturation (Max)	400mV	300mV	400mV
Operating Temperature	-55°C ~ 100°C	-55°C ~ 100°C	-55°C ~ 100°C
Package / Case	6-DIP (0.300", 7.62mm)	6-DIP (0.300", 7.62mm)	6-DIP (0.300", 7.62mm)
Mounting Type	Through Hole	Through Hole	Through Hole
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

SFH608-4 is the primary substitute for MCT210 applications. Both parts share identical isolation voltage (5300Vrms), package configuration (6-DIP), output topology (transistor with base), and operating temperature range. SFH608-4 is manufactured by Vishay Semiconductor Opto Division and holds ROHS3 compliance status. The part is currently in Last Time Buy status, indicating limited future availability.

4N35-000E is suitable only for applications where isolation voltage requirements can be reduced to 3550Vrms. This part is manufactured by Broadcom Limited and maintains Active product status with ROHS3 compliance. The 4N35-000E provides higher output current capability (100mA vs. 50mA) and lower Vce saturation (300mV vs. 400mV), which may offer performance advantages in specific low-isolation-voltage applications.

Both substitute parts maintain the same operating temperature range and 6-DIP through-hole mounting configuration as the MCT210, ensuring mechanical compatibility with existing PCB layouts.

Frequently Asked Questions (FAQ)

Q: Can 4N35-000E directly replace MCT210 in all applications?

A: No. The 4N35-000E provides 3550Vrms isolation voltage compared to MCT210's 5300Vrms. Direct substitution is only valid for applications where the lower isolation voltage meets system requirements. Isolation voltage is a critical safety and performance parameter that cannot be compromised.

Q: Is SFH608-4 a pin-for-pin replacement for MCT210?

A: Yes. Both parts use 6-DIP (0.300", 7.62mm) packaging with identical through-hole mounting configuration. The transistor with base output topology is identical, making SFH608-4 a direct pin-compatible substitute for MCT210.

Q: What is the difference in current transfer ratio between MCT210 and SFH608-4?

A: MCT210 specifies 150% minimum CTR at 10mA input current. SFH608-4 specifies 160% to 320% CTR at 1mA input current. The different measurement conditions reflect different design characteristics, but both parts provide adequate current transfer for typical optoisolator applications.

Q: Are there compliance differences between MCT210 and its substitutes?

A: SFH608-4 and 4N35-000E both carry ROHS3 compliance certification. MCT210 compliance status is not specified in available documentation. Both substitute parts meet REACH Unaffected and EAR99 ECCN classifications, matching MCT210's regulatory profile.

Q: Why is SFH608-4 in Last Time Buy status?

A: Last Time Buy status indicates the manufacturer has announced end-of-life for this product. Existing inventory remains available, but future production is not planned. For new designs requiring 5300Vrms isolation in 6-DIP configuration, design qualification of alternative optoisolator families may be necessary for long-term supply assurance.

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