SFH6186-2T Equivalent & Substitute Parts

Part Overview

The SFH6186-2T is an optoisolator with transistor output manufactured by Vishay Semiconductor Opto Division. This component provides galvanic isolation up to 5300Vrms with a single channel configuration in a 4-SMD surface mount package. The device is actively produced and widely used in industrial control, power management, and signal isolation applications where high voltage isolation is required. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained across the specified parameter ranges.

Substiute Parts

SFH6186-2T

Vishay Semiconductor Opto DivisionIn Stock: 1369SFH6186-2T Datasheet

Current PartRFQ

SFH618A-4XSMT&R

Isocom Components 2004 LTDIn Stock: 2238SFH618A-4XSMT&R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SFH6186-2T is determined by the following critical parameters:

• Voltage isolation rating of 5300Vrms or higher
• Single channel transistor output configuration
• 4-SMD surface mount package with gull wing leads
• Maximum output voltage of 55V or greater
• Maximum output current of 50mA or greater
• Vce saturation maximum of 400mV or less
• Operating temperature range that encompasses the application requirements
• ROHS3 compliance and equivalent regulatory status

The SFH618A-4XSMT&R meets these substitution criteria. While it exhibits different current transfer ratio specifications and turn-on/turn-off timing characteristics, these parameters fall within acceptable ranges for equivalent functional performance in isolation applications.

Parameter Comparison

Engineering Selection Recommendations

Both the SFH6186-2T and SFH618A-4XSMT&R are active products with ROHS3 compliance and equivalent regulatory status (REACH Unaffected, ECCN EAR99). The SFH618A-4XSMT&R demonstrates higher current transfer ratio specifications, which provides improved signal transmission efficiency in isolation circuits. The primary consideration for selection is the operating temperature range: the SFH6186-2T supports operation from -55°C to 100°C, while the SFH618A-4XSMT&R operates from -30°C to 100°C. Applications requiring extended low-temperature operation below -30°C must use the SFH6186-2T. For standard industrial temperature ranges, either component is suitable based on availability and supply chain requirements.

Frequently Asked Questions (FAQ)

Q: Can the SFH618A-4XSMT&R replace the SFH6186-2T in all applications?

A: The SFH618A-4XSMT&R is compatible with most applications. However, if your circuit operates below -30°C, the SFH6186-2T is required due to its extended low-temperature rating.

Q: What does the higher current transfer ratio of the SFH618A-4XSMT&R mean?

A: The SFH618A-4XSMT&R has a minimum current transfer ratio of 160% compared to 63% for the SFH6186-2T. This indicates more efficient signal transmission through the optoisolator, requiring less input current to achieve the same output response.

Q: Are the packages identical?

A: Yes. Both components use a 4-SMD surface mount package with gull wing leads, ensuring mechanical and electrical compatibility on the same PCB footprint.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the SFH6186-2T and SFH618A-4XSMT&R are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99.

Q: What is the isolation voltage rating?

A: Both components provide 5300Vrms isolation, suitable for high-voltage galvanic separation in industrial and power management circuits.