SFH6135 Equivalent & Substitute Parts

Part Overview

The SFH6135 is an optoisolator transistor with base output manufactured by Vishay Semiconductor Opto Division. It provides 5300Vrms isolation voltage in a single-channel configuration with transistor output and integrated base connection. The device is currently in active product status and is supplied in 8-DIP through-hole packaging.

Substitute parts are necessary when the SFH6135 becomes unavailable, when alternative isolation voltage ratings are acceptable for specific applications, or when different electrical performance characteristics better match system requirements.

Substiute Parts

SFH6135

Vishay Semiconductor Opto DivisionIn Stock: 10146SFH6135 Datasheet

Current PartRFQ

6N136

onsemiIn Stock: 501706N136 Datasheet

MFR RecommendedRFQ

HCPL-4562-000E

Broadcom LimitedIn Stock: 1751HCPL-4562-000E Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SFH6135 is determined by the following critical parameters:

Mandatory Compatibility Criteria:

• Single-channel configuration
• Transistor output with base connection
• 8-DIP through-hole package (0.300", 7.62mm)
• DC input type
• Maximum output voltage of 20V or higher
• Maximum output current of 8mA or higher
• Operating temperature range that encompasses or exceeds -55°C to 100°C

Allowable Variation Parameters:

• Isolation voltage: Substitutes may have lower isolation ratings (2500Vrms to 3750Vrms) if system requirements permit
• Current transfer ratio: Substitutes with higher CTR values are acceptable
• Turn-on/turn-off time: Substitutes with different switching speeds are acceptable if application timing allows
• Forward voltage and forward current: Substitutes with different input characteristics are acceptable

The two identified substitute parts meet these criteria while offering different isolation voltage ratings and electrical performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

SFH6135 (Primary Part): Recommended for new designs requiring maximum isolation voltage (5300Vrms) with active product status and full RoHS3 compliance. Suitable for applications with extended temperature range requirements (-55°C to 100°C) and higher output voltage tolerance (25V maximum).

6N136 (Substitute): Acceptable for applications where 2500Vrms isolation is sufficient. This part is obsolete and should be used only when existing inventory is available or when legacy system compatibility is required. Higher current transfer ratio (19% minimum, 50% maximum) provides improved switching characteristics compared to the SFH6135. Operating temperature range matches the primary part. Forward current specification (25 mA maximum) is identical to SFH6135.

HCPL-4562-000E (Substitute): Recommended for active production when SFH6135 availability is constrained. Provides 3750Vrms isolation, which is intermediate between the primary part and the 6N136. Active product status and RoHS3 compliance ensure long-term availability. Operating temperature range is narrower (-40°C to 85°C), which may limit use in extreme cold environments. Forward current specification (12 mA maximum) is lower than the primary part and must be verified against input circuit requirements.

Frequently Asked Questions (FAQ)

Q: Can the 6N136 replace the SFH6135 in all applications?

A: The 6N136 is mechanically and functionally compatible (same 8-DIP package, transistor output with base, single channel). However, isolation voltage is reduced from 5300Vrms to 2500Vrms. Substitution is valid only if the application isolation requirement is 2500Vrms or lower. The 6N136 is obsolete; verify availability before design selection.

Q: What is the key difference between the HCPL-4562-000E and SFH6135?

A: The HCPL-4562-000E provides 3750Vrms isolation versus 5300Vrms for the SFH6135. Both are active products in 8-DIP packages with transistor base outputs. The HCPL-4562-000E has a narrower operating temperature range (-40°C to 85°C versus -55°C to 100°C) and lower maximum forward current (12 mA versus 25 mA). Substitution is valid if isolation voltage and temperature range requirements are met.

Q: Are all three parts pin-compatible?

A: Yes. All three parts use the 8-DIP (0.300", 7.62mm) package with identical pinout for single-channel transistor output with base configuration. Direct socket substitution is possible without PCB modification.

Q: Which substitute should I select for a new design?

A: For new designs, select HCPL-4562-000E if 3750Vrms isolation is acceptable, as it is an active product with RoHS3 compliance and confirmed long-term availability. The 6N136 is obsolete and should not be selected for new designs. The SFH6135 remains the preferred choice if 5300Vrms isolation is required.

Q: What happens if I use a substitute with lower isolation voltage?

A: Using a substitute with lower isolation voltage reduces the maximum voltage differential that can be safely applied across the isolation barrier. This may violate safety or regulatory requirements in high-voltage applications. Verify that the substitute isolation rating meets or exceeds the system isolation requirement before substitution.

Q: Is the HCPL-4562-000E suitable for -55°C operation?

A: No. The HCPL-4562-000E operating temperature range is -40°C to 85°C. It is not rated for operation below -40°C. If the application requires -55°C operation, use the SFH6135 or 6N136, both of which are rated to -55°C.