MCT5211SD Equivalent & Substitute Parts

Part Overview

The MCT5211SD is an optoisolator transistor with base output manufactured by onsemi, featuring 5300Vrms isolation voltage in a 6-SMD surface mount package. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The MCT5211SD provides DC input with transistor output capability, suitable for applications requiring galvanic isolation with moderate current switching.

Substiute Parts

MCT5211SD

onsemiIn Stock: 4300MCT5211SD Datasheet

Current PartRFQ

MCT5210SM

Fairchild SemiconductorIn Stock: 4651MCT5210SM Datasheet

SimilarRFQ

MCT5211SR2M

onsemiIn Stock: 1794MCT5211SR2M Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MCT5211SD are selected based on the following critical parameters that determine functional compatibility:

Primary Compatibility Criteria:

• Single channel configuration
• Transistor with base output topology
• 6-SMD surface mount package with gull wing leads
• Maximum output voltage of 30V
• Output current capability of 150mA per channel
• Vce saturation maximum of 400mV
• DC input type

Isolation Voltage Consideration: The MCT5211SD operates at 5300Vrms isolation. Substitute parts with lower isolation voltage (4170Vrms) remain functionally compatible for applications not requiring the full 5300Vrms specification, as they maintain all other electrical and mechanical parameters within acceptable ranges.

Identified Substitutes:

• MCT5210SM (Fairchild Semiconductor) - 4170Vrms isolation
• MCT5211SR2M (onsemi) - 4170Vrms isolation, active product status

Parameter Comparison

Engineering Selection Recommendations

MCT5211SR2M (onsemi) is the primary substitute for the obsolete MCT5211SD. Both parts are manufactured by onsemi, share identical current transfer ratio specifications (150% @ 1.6mA), and maintain matching switching time characteristics (14µs, 2.5µs). The MCT5211SR2M is actively produced and available in tape & reel packaging. The reduced isolation voltage (4170Vrms versus 5300Vrms) is the only electrical difference. This part is ROHS3 compliant and REACH unaffected.

MCT5210SM (Fairchild Semiconductor) serves as an alternative substitute with active product status. This part maintains all mechanical and output stage parameters but features lower current transfer ratio (70% @ 3mA) and faster turn-off time (400ns versus 2.5µs). The MCT5210SM is supplied in bulk packaging. Selection of this part requires confirmation that the reduced current transfer ratio and faster switching characteristics are compatible with the application circuit.

Both substitutes maintain the 6-SMD gull wing package, 30V maximum output voltage, 150mA output current, and 400mV Vce saturation specifications of the original MCT5211SD.

Frequently Asked Questions (FAQ)

Q: Can MCT5211SR2M directly replace MCT5211SD in existing designs? A: Yes. The MCT5211SR2M maintains identical package geometry (6-SMD, gull wing), pinout, and all critical electrical parameters including current transfer ratio and switching times. The lower isolation voltage (4170Vrms versus 5300Vrms) is the only specification change and is acceptable for applications not requiring the full 5300Vrms isolation rating.

Q: What is the key difference between MCT5210SM and MCT5211SR2M? A: The MCT5210SM has a lower current transfer ratio (70% @ 3mA versus 150% @ 1.6mA) and faster turn-off time (400ns versus 2.5µs). Both parts share identical package, output voltage, and output current specifications. Selection depends on circuit requirements for input current and switching speed.

Q: Are there temperature range limitations when substituting? A: The MCT5211SD operates from -55°C to 100°C, while both substitutes operate from -40°C to 100°C. Applications requiring operation below -40°C cannot use MCT5210SM or MCT5211SR2M as direct replacements.

Q: Does packaging format affect substitution compatibility? A: All three parts use identical 6-SMD gull wing surface mount packages. The MCT5211SR2M is supplied in tape & reel format while MCT5210SM is supplied in bulk. Packaging format does not affect electrical compatibility or PCB assembly compatibility.

Q: What compliance certifications apply to substitute parts? A: MCT5211SR2M is ROHS3 compliant and REACH unaffected. MCT5210SM and MCT5211SD both carry REACH unaffected status. All three parts are classified under ECCN EAR99 and HTSUS 8541.49.8000.