MCT2202 Equivalent & Substitute Parts

Part Overview

The MCT2202 is an optoisolator transistor with base output manufactured by onsemi, providing 5300Vrms isolation in a 6-DIP through-hole package. This component integrates a photodiode input stage with a transistor output stage including base connection, enabling high-voltage isolation in single-channel applications. The MCT2202 is classified as obsolete, making identification of functionally equivalent active alternatives necessary for new designs and ongoing production support.

Key Parameters

Parameter	MCT2202 Value
Voltage - Isolation	5300Vrms
Number of Channels	1
Current Transfer Ratio (Min)	63% @ 10mA
Current Transfer Ratio (Max)	125% @ 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 MCT2202 is determined by the following criteria:

Package compatibility: All substitutes must use 6-DIP (0.300", 7.62mm) through-hole packaging to ensure direct PCB footprint compatibility
Output stage configuration: All substitutes must feature transistor output with base connection to maintain circuit interface compatibility
Single-channel architecture: All substitutes must provide single-channel isolation
Input type: All substitutes must accept DC input
Isolation voltage: Substitutes with isolation voltage ≥5300Vrms provide equivalent or superior isolation performance; lower isolation ratings may be acceptable depending on application requirements
Current transfer ratio: Substitutes with CTR (Min) ≥63% @ 10mA maintain comparable input-to-output signal transfer characteristics
Output current capability: Substitutes with output current ≥50mA per channel support equivalent load driving capacity
Operating temperature range: Substitutes covering -55°C ~ 100°C or wider ranges ensure thermal compatibility

Parameter Comparison

Parameter	MCT2202	CNY17-2	CNY172M	4N25-000E
Manufacturer	onsemi	Lite-On Inc.	onsemi	Broadcom Limited
Product Status	Obsolete	Active	Active	Active
Voltage - Isolation	5300Vrms	5000Vrms	4170Vrms	2500Vrms
Number of Channels	1	1	1	1
Current Transfer Ratio (Min)	63% @ 10mA	63% @ 10mA	63% @ 10mA	20% @ 10mA
Current Transfer Ratio (Max)	125% @ 10mA	125% @ 10mA	125% @ 10mA	—
Output Type	Transistor with Base	Transistor with Base	Transistor with Base	Transistor with Base
Voltage - Output (Max)	30V	70V	70V	30V
Current - Output / Channel	50mA	150mA	50mA	100mA
Vce Saturation (Max)	400mV	300mV	400mV	500mV
Operating Temperature	-55°C ~ 100°C	-55°C ~ 100°C	-40°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)	6-DIP (0.300", 7.62mm)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
RoHS Status	—	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

CNY17-2 (Lite-On Inc.) — Active product status with ROHS3 compliance. Isolation voltage of 5000Vrms provides near-equivalent performance to the MCT2202 (5300Vrms). Current transfer ratio matches the MCT2202 specification (63% min, 125% max @ 10mA). Output current capability of 150mA exceeds the MCT2202 requirement of 50mA. Operating temperature range of -55°C ~ 100°C matches the MCT2202. This part represents the closest functional equivalent with superior current handling and active manufacturing status.

CNY172M (onsemi) — Active product status with ROHS3 compliance. Isolation voltage of 4170Vrms is lower than the MCT2202 but remains suitable for applications not requiring the full 5300Vrms isolation margin. Current transfer ratio matches the MCT2202 (63% min, 125% max @ 10mA). Output voltage capability of 70V exceeds the MCT2202 (30V). Operating temperature range of -40°C ~ 100°C is narrower than the MCT2202 at the lower end. This part is suitable for applications with reduced isolation voltage requirements.

4N25-000E (Broadcom Limited) — Active product status with ROHS3 compliance. Isolation voltage of 2500Vrms is significantly lower than the MCT2202 and represents a reduced-isolation alternative. Current transfer ratio minimum of 20% @ 10mA is substantially lower than the MCT2202 (63% min), affecting input-to-output signal transfer efficiency. Output current capability of 100mA exceeds the MCT2202. Operating temperature range of -55°C ~ 100°C matches the MCT2202. This part is suitable only for applications with lower isolation voltage requirements and where reduced CTR is acceptable.

Frequently Asked Questions (FAQ)

Q: Can the CNY17-2 directly replace the MCT2202 in existing designs?

A: Yes, for applications where 5000Vrms isolation is sufficient. The CNY17-2 maintains identical current transfer ratio specifications (63% min, 125% max @ 10mA), operates across the same temperature range (-55°C ~ 100°C), and uses the same 6-DIP package. The 300Vrms reduction in isolation voltage (from 5300Vrms to 5000Vrms) is typically acceptable in most industrial applications. Verify that your circuit design does not specifically require the higher isolation margin of the MCT2202.

Q: What is the key difference between CNY172M and CNY17-2?

A: Both are onsemi and Lite-On products respectively with active status. CNY172M has lower isolation voltage (4170Vrms vs. 5000Vrms) and a narrower operating temperature range (-40°C ~ 100°C vs. -55°C ~ 100°C). CNY17-2 provides higher output current capability (150mA vs. 50mA) and superior output voltage rating (70V vs. 70V). Select CNY17-2 for applications requiring the full temperature range and higher current output; select CNY172M only if isolation voltage reduction is acceptable.

Q: Is the 4N25-000E suitable as a substitute for the MCT2202?

A: The 4N25-000E is suitable only for applications where isolation voltage can be reduced to 2500Vrms and where lower current transfer ratio (20% min vs. 63% min) is acceptable. The significantly reduced CTR affects input signal-to-output transfer efficiency and may require circuit redesign to compensate. Use this part only when isolation voltage requirements are substantially lower than the MCT2202 specification.

Q: Are all substitute parts compatible with the same PCB footprint?

A: Yes. All substitute parts use the 6-DIP (0.300", 7.62mm) through-hole package, ensuring direct PCB footprint compatibility with the MCT2202. No PCB layout modifications are required for package substitution.

Q: What compliance certifications should I verify for new designs?

A: All active substitute parts (CNY17-2, CNY172M, 4N25-000E) carry ROHS3 compliance certification. The MCT2202, being obsolete, does not list RoHS status. For new designs, select from the active alternatives to ensure compliance with current environmental and regulatory standards.

Q: Does the MCT2202 have any unique characteristics that cannot be matched by substitutes?

A: The MCT2202 provides the highest isolation voltage (5300Vrms) among the listed options. If your application specifically requires isolation voltage ≥5300Vrms, the CNY17-2 at 5000Vrms represents the closest available alternative. Applications requiring exactly 5300Vrms isolation may need to evaluate whether the 300Vrms reduction is acceptable or pursue alternative component sources.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message