H11C5 Equivalent & Substitute Parts

Part Overview

The H11C5 is an optoisolator with SCR output manufactured by onsemi, designed for high-voltage isolation applications requiring 5300Vrms isolation voltage. This component features a single channel configuration in a 6-DIP through-hole package and is rated for operating temperatures from -55°C to 100°C. The H11C5 is currently classified as obsolete, making identification of compatible substitute parts essential for ongoing system maintenance and new design implementations.

Substiute Parts

H11C5

onsemiIn Stock: 3225H11C5 Datasheet

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IL420

Vishay Semiconductor Opto DivisionIn Stock: 18779IL420 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the H11C5 is determined by the following critical parameters that must remain compatible:

• Isolation Voltage: 5300Vrms (exact match required)
• Number of Channels: 1 (single channel configuration)
• Package Type: 6-DIP through-hole form factor
• Operating Temperature Range: -55°C to 100°C (minimum requirement)
• Maximum On-State Current: 300 mA (minimum capability)
• Forward Voltage Characteristics: Vf approximately 1.2V and If maximum 60 mA

The IL420 qualifies as a substitute part because it maintains the same isolation voltage rating, channel count, package configuration, and operating temperature range. While the IL420 features a Triac output instead of SCR output, both output types function as electronic switches in isolation applications and share compatible electrical interfaces within the specified parameters.

Parameter Comparison

Engineering Selection Recommendations

The IL420 is an active product with broader regulatory approvals (CQC, CSA, cUR, UR) compared to the H11C5 (UR only). Both components meet the same isolation voltage requirement of 5300Vrms and share identical physical packaging, enabling direct socket replacement in through-hole applications. The IL420 demonstrates superior performance characteristics including lower LED trigger current (2 mA versus 20 mA), higher off-state voltage rating (600 V versus 400 V), and significantly higher static dV/dt capability (10 kV/µs versus 500 V/µs). The IL420 maintains RoHS3 compliance, whereas the H11C5 status is not specified. Both components are REACH unaffected and classified under the same HTSUS code (8541.49.8000).

Frequently Asked Questions (FAQ)

Q: Can the IL420 directly replace the H11C5 in existing designs?

A: Yes, the IL420 is a direct physical replacement in 6-DIP through-hole applications. Both components share identical isolation voltage (5300Vrms), channel count (1), package dimensions (6-DIP 0.300" / 7.62mm), and operating temperature range (-55°C to 100°C). Circuit-level validation is required to confirm compatibility with the specific output type transition from SCR to Triac.

Q: What is the primary difference between SCR and Triac output types?

A: SCR (Silicon Controlled Rectifier) output conducts in one direction only, while Triac output conducts in both directions. Both function as electronic switches for isolation purposes. Application requirements determine which output type is appropriate.

Q: Are there any compliance or certification differences?

A: The IL420 holds broader regulatory approvals (CQC, CSA, cUR, UR) and maintains RoHS3 compliance. The H11C5 lists UR approval only. Both components are REACH unaffected.

Q: What does the lower LED trigger current of the IL420 mean?

A: The IL420 requires only 2 mA maximum LED trigger current compared to 20 mA for the H11C5. This represents reduced input drive requirements and lower power consumption on the input side of the optoisolator.

Q: Is the higher static dV/dt rating of the IL420 beneficial?

A: The IL420 static dV/dt rating of 10 kV/µs (versus 500 V/µs for H11C5) indicates superior immunity to rapid voltage transients. This provides enhanced noise immunity in high-dV/dt environments.

Q: Can both parts be used interchangeably in new designs?

A: The IL420 is recommended for new designs due to its active product status, broader certifications, and superior performance characteristics. The H11C5 is obsolete and should only be used for legacy system maintenance where output type compatibility is confirmed.