MCT5211 Equivalent & Substitute Parts

Part Overview

The MCT5211 is an optoisolator transistor with base output manufactured by Vishay Semiconductor Opto Division. This component provides 5300Vrms isolation in a 6-DIP package and is designed for single-channel DC input applications requiring galvanic isolation with transistor output capability.

The MCT5211 is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity and ensure component availability for new production runs, repairs, and system upgrades.

Substiute Parts

MCT5211

Vishay Semiconductor Opto DivisionIn Stock: 5948MCT5211 Datasheet

Current PartRFQ

SFH608-4

Vishay Semiconductor Opto DivisionIn Stock: 1492SFH608-4 Datasheet

MFR RecommendedRFQ

CNY17-4-000E

Broadcom LimitedIn Stock: 12615CNY17-4-000E Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MCT5211 must satisfy the following criteria based on provided electrical and mechanical parameters:

Mandatory Compatibility Requirements:

• Package / Case: 6-DIP (0.300", 7.62mm) — ensures mechanical and pin compatibility
• Number of Channels: 1 — maintains single-channel isolation architecture
• Output Type: Transistor with Base — preserves circuit interface requirements
• Mounting Type: Through Hole — ensures PCB assembly compatibility
• Operating Temperature Range: -55°C ~ 100°C — maintains thermal operating envelope
• Input Type: DC — confirms input signal compatibility

Electrical Substitution Parameters:

• Voltage - Isolation: minimum 5300Vrms or higher — ensures isolation performance meets or exceeds original specification
• Current Transfer Ratio (Min): minimum 150% — maintains switching performance
• Vce Saturation (Max): 400mV or lower — ensures output saturation characteristics
• Voltage - Forward (Vf) (Typ): input LED forward voltage compatibility
• Current - DC Forward (If) (Max): input current capability

Compliance Requirements:

• RoHS Status: ROHS3 Compliant
• REACH Status: REACH Unaffected
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Parameter Comparison

Engineering Selection Recommendations

SFH608-4 (Vishay Semiconductor Opto Division)

The SFH608-4 is a direct substitute from the same manufacturer. It maintains identical isolation voltage (5300Vrms), package configuration, and thermal operating range. The SFH608-4 offers improved switching performance with reduced turn-on/turn-off times (8µs/7.5µs versus 20µs/20µs) and higher output voltage capability (55V versus 30V). Current transfer ratio performance is equivalent or superior. Product status is Last Time Buy, indicating limited future availability.

CNY17-4-000E (Broadcom Limited)

The CNY17-4-000E is a cross-manufacturer substitute with active product status, ensuring long-term availability. Isolation voltage is 5000Vrms, which is 300V lower than the MCT5211 specification. This component provides superior output current capability (150mA versus unspecified), higher maximum output voltage (70V), and lower saturation voltage (300mV). The CNY17-4-000E is suitable for applications where the 5000Vrms isolation rating is acceptable and where higher output current or voltage capability provides design margin.

Selection Basis:

• Both substitutes maintain mechanical compatibility (6-DIP package, through-hole mounting)
• Both preserve single-channel transistor-with-base output architecture
• Both comply with RoHS3, REACH, and MSL requirements
• SFH608-4 is preferred for direct replacement requiring identical isolation voltage
• CNY17-4-000E is preferred for new designs requiring active product status and extended availability

Frequently Asked Questions (FAQ)

Q: Can the SFH608-4 replace the MCT5211 in existing designs?

A: Yes. The SFH608-4 maintains identical isolation voltage (5300Vrms), package footprint (6-DIP), and thermal operating range (-55°C to 100°C). Pin configuration and functional output type (transistor with base) are compatible. The improved switching speed and higher output voltage rating provide additional design margin.

Q: What is the key difference between SFH608-4 and CNY17-4-000E?

A: The primary difference is isolation voltage: SFH608-4 provides 5300Vrms (matching MCT5211), while CNY17-4-000E provides 5000Vrms. The CNY17-4-000E offers higher output current capability (150mA versus 50mA) and active product status. Selection depends on whether the 300V isolation voltage reduction is acceptable for the application.

Q: Are all three parts pin-compatible?

A: Yes. All three components use the 6-DIP (0.300", 7.62mm) package with identical through-hole mounting. Pin configuration for single-channel transistor-with-base output is compatible across all parts.

Q: Which substitute should be selected for new production?

A: The CNY17-4-000E is recommended for new production due to active product status and guaranteed long-term availability. The SFH608-4 is classified as Last Time Buy and has limited future supply. Both parts meet all mandatory compatibility requirements.

Q: Do the substitutes require circuit modifications?

A: No circuit modifications are required. Both substitutes maintain the same functional output type (transistor with base) and operating temperature range. The improved electrical characteristics (faster switching, higher output voltage/current) are backward-compatible with designs using the MCT5211.

Q: What is the significance of the product status classifications?

A: MCT5211 (Obsolete) is no longer manufactured. SFH608-4 (Last Time Buy) has limited remaining inventory and will not be replenished. CNY17-4-000E (Active) is in current production with ongoing availability. For long-term supply security, CNY17-4-000E is the preferred choice.