4N33-X009 Equivalent & Substitute Parts

Part Overview

The 4N33-X009 is a Darlington optoisolator with base output manufactured by Vishay Semiconductor Opto Division, rated for 5300Vrms isolation voltage in a 6-SMD surface mount package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The 4N33-X009 provides single-channel optical isolation with Darlington output configuration suitable for high-voltage switching and signal isolation applications.

Substiute Parts

4N33-X009

Vishay Semiconductor Opto DivisionIn Stock: 40714N33-X009 Datasheet

Current PartRFQ

4N33-X001

Vishay Semiconductor Opto DivisionIn Stock: 8194N33-X001 Datasheet

MFR RecommendedRFQ

MCA230SM

Isocom Components 2004 LTDIn Stock: 1106MCA230SM Datasheet

MFR RecommendedRFQ

MCA230SMT&R

Isocom Components 2004 LTDIn Stock: 1063MCA230SMT&R Datasheet

MFR RecommendedRFQ

MCA231SM

Isocom Components 2004 LTDIn Stock: 904MCA231SM Datasheet

MFR RecommendedRFQ

MCA231SMT&R

Isocom Components 2004 LTDIn Stock: 1058MCA231SMT&R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 4N33-X009 is determined by the following critical parameters:

• Isolation Voltage: Minimum 5000Vrms (5300Vrms preferred for direct replacement)
• Output Configuration: Darlington with Base output type
• Number of Channels: Single channel (1)
• Current Transfer Ratio: Minimum 100% @ 10mA
• Output Voltage Rating: 30V maximum
• Operating Temperature Range: -55°C to 100°C minimum
• Input Type: DC
• Mounting Type: Surface Mount (6-SMD package preferred for form-factor compatibility)

Substitute parts are grouped into two categories: direct form-factor replacements (6-SMD surface mount) and functional equivalents with different packaging (6-DIP through-hole). The 4N33-X001 provides functional equivalence with different mounting technology. The MCA230 and MCA231 series from Isocom Components provide electrical equivalence with identical or superior isolation voltage ratings and compatible output specifications.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation - Form-Factor Compatible (6-SMD Surface Mount):

The MCA230SM and MCA230SMT&R from Isocom Components provide direct form-factor compatibility with the 4N33-X009. Both maintain 5300Vrms isolation voltage, Darlington with base output configuration, and 6-SMD surface mount packaging. The MCA230SMT&R variant in Tape & Reel packaging is preferred for automated assembly processes. Current Transfer Ratio of 100% @ 10mA meets minimum substitution criteria, though lower than the original 500%.

Secondary Recommendation - Enhanced Performance (5000Vrms Isolation):

The MCA231SM and MCA231SMT&R series offer 5000Vrms isolation voltage with improved Current Transfer Ratio of 200% @ 10mA and identical 6-SMD surface mount packaging. These parts are suitable where slightly lower isolation voltage is acceptable and enhanced current transfer characteristics are beneficial. The MCA231SMT&R variant supports automated assembly.

Functional Equivalent - Through-Hole Alternative:

The 4N33-X001 from Vishay Semiconductor provides identical electrical specifications (5300Vrms isolation, 500% Current Transfer Ratio) with 6-DIP through-hole packaging. This option is applicable only where PCB design accommodates through-hole mounting or where surface mount technology is not available.

All recommended substitutes maintain ROHS3 compliance, MSL Level 1 rating, and -55°C to 100°C operating temperature range consistent with the original component.

Frequently Asked Questions (FAQ)

Q: Can the 4N33-X001 replace the 4N33-X009 in existing designs?

A: The 4N33-X001 provides identical electrical performance and isolation voltage (5300Vrms) with matching Current Transfer Ratio (500% @ 10mA). However, it uses 6-DIP through-hole packaging instead of 6-SMD surface mount. Direct PCB substitution is not possible without layout modification. The 4N33-X001 is suitable only for designs that can accommodate through-hole mounting.

Q: What is the difference between MCA230 and MCA231 series?

A: The primary differences are isolation voltage and Current Transfer Ratio. MCA230 series maintains 5300Vrms isolation matching the original 4N33-X009, while MCA231 series provides 5000Vrms isolation. MCA231 offers higher Current Transfer Ratio (200% @ 10mA) compared to MCA230 (100% @ 10mA). Both series use identical 6-SMD surface mount packaging and support the same operating temperature range.

Q: What is the significance of Tape & Reel (TR) packaging?

A: Tape & Reel packaging (MCA230SMT&R and MCA231SMT&R) is optimized for automated pick-and-place assembly processes used in high-volume manufacturing. Tube packaging (MCA230SM and MCA231SM) is suitable for manual assembly or lower-volume production. Electrical specifications are identical between TR and Tube variants of the same part number.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All recommended substitute parts (4N33-X001, MCA230SM, MCA230SMT&R, MCA231SM, MCA231SMT&R) maintain ROHS3 compliance and MSL Level 1 rating, matching the original 4N33-X009 environmental and regulatory specifications.

Q: What is the minimum isolation voltage acceptable for substitution?

A: The 4N33-X009 specifies 5300Vrms isolation. Substitute parts must maintain minimum 5000Vrms isolation voltage to ensure adequate safety margin in high-voltage isolation applications. MCA230 series (5300Vrms) provides direct voltage matching, while MCA231 series (5000Vrms) represents the minimum acceptable threshold.

Q: How does Current Transfer Ratio affect component selection?

A: Current Transfer Ratio determines the efficiency of optical signal transfer from input to output. The original 4N33-X009 specifies 500% @ 10mA. Substitute parts with lower ratios (MCA230 at 100%, MCA231 at 200%) require circuit design verification to ensure adequate output current for intended application. Higher ratios provide design margin but are not required for direct substitution.