STK621-033N-E Equivalent & Substitute Parts

Part Overview

The STK621-033N-E is a half bridge driver IC manufactured by onsemi, designed for AC motor applications using IGBT technology. This component features a 15A output current capability with integrated bootstrap circuit, auto restart, and current limiting fault protection. The device operates across a supply voltage range of 12.5V to 17.5V and supports load voltages up to 400V maximum.

The STK621-033N-E is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain system functionality and ensure continued availability for new designs or replacement applications where this component is no longer procurable.

Substiute Parts

STK621-033N-E

onsemiIn Stock: 1644STK621-033N-E Datasheet

Current PartRFQ

FNA41560T2

onsemiIn Stock: 26447FNA41560T2 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the STK621-033N-E is based on the following critical parameters that define functional equivalence:

• Output Current Rating: 15A continuous output current capability
• Technology Platform: IGBT-based driver architecture
• Voltage Specifications: Supply voltage range and maximum load voltage compatibility
• Protection Features: Current limiting and UVLO fault protection mechanisms
• Thermal Operating Range: -20°C to 150°C junction temperature capability
• Mounting Configuration: Through hole mounting compatibility

The FNA41560T2 qualifies as a substitute based on matching the 15A current rating and IGBT technology platform. However, this substitute operates in a different configuration (3 Phase Inverter) and package format (26-PowerDIP Module), requiring mechanical and electrical integration assessment for specific applications.

Parameter Comparison

Engineering Selection Recommendations

The FNA41560T2 is an active product from onsemi and maintains REACH compliance status equivalent to the STK621-033N-E. The substitute part supports a higher maximum load voltage (600V versus 400V), which provides additional design margin for applications operating near the upper voltage limits of the original component.

Selection of the FNA41560T2 requires verification of mechanical compatibility due to package format differences (26-PowerDIP Module versus 23-SIP). The functional configuration difference (3 Phase Inverter versus Half Bridge) must be evaluated against specific application requirements. Both components share IGBT technology and 15A current rating, establishing the foundation for substitution feasibility.

Frequently Asked Questions (FAQ)

Q: What are the primary criteria for substituting the STK621-033N-E?

A: The substitute must maintain 15A output current capability, IGBT technology platform, and through hole mounting compatibility. Load voltage and supply voltage specifications must be verified against application requirements.

Q: How does the FNA41560T2 differ functionally from the STK621-033N-E?

A: The FNA41560T2 is configured as a 3 Phase Inverter module with 600V load voltage rating, compared to the STK621-033N-E half bridge configuration with 400V maximum load voltage. Both devices support 15A current and IGBT technology.

Q: Are there package compatibility considerations?

A: Yes. The STK621-033N-E uses a 23-SIP package with 19 formed leads, while the FNA41560T2 uses a 26-PowerDIP Module format. PCB layout and mechanical mounting must be reassessed for the substitute component.

Q: Do both parts meet the same compliance standards?

A: Both the STK621-033N-E and FNA41560T2 maintain REACH Unaffected status and share the same HTSUS classification (8542.39.0001), indicating equivalent regulatory compliance for these parameters.

Q: What is the impact of the higher voltage rating on the FNA41560T2?

A: The 600V maximum load voltage of the FNA41560T2 exceeds the 400V specification of the STK621-033N-E. This provides additional voltage margin but does not reduce compatibility for applications operating within the original 400V specification.