Q8040K3TP TRIAC 800V 40A Equivalent & Substitute Parts

Part Overview

The Q8040K3TP is a standard TRIAC manufactured by Littelfuse Inc., rated for 800V off-state voltage and 40A on-state current in a TO-218AC isolated package. This component is designed for AC switching and power control applications requiring through-hole mounting. The part is currently active in production with full RoHS3 compliance and REACH unaffected status. Equivalent substitute parts are identified based on matching electrical specifications, package configuration, and thermal operating range to ensure direct functional replacement in circuit designs.

Substiute Parts

Q8040K3TP

Littelfuse Inc.In Stock: 1118Q8040K3TP Datasheet

Current PartRFQ

QJ8040K3TP

Littelfuse Inc.In Stock: 1241QJ8040K3TP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Q8040K3TP is determined by strict equivalence across the following critical parameters:

• Voltage Rating (Off State): 800V minimum
• Current Rating (On State): 40A maximum
• Gate Trigger Specifications: Vgt ≤ 1.3V, Igt ≤ 35mA
• Hold Current: Ih ≤ 60mA
• Surge Current Capability: 420A/500A (50/60Hz)
• Package Configuration: TO-218AC isolated tab, through-hole mounting
• Temperature Operating Range: -40°C to 150°C junction temperature
• Triac Type: Standard configuration, single device

Parts meeting all these parameters are classified as parametric equivalents and direct substitutes. The QJ8040K3TP meets all specified criteria and is identified as a full equivalent substitute.

Parameter Comparison

Engineering Selection Recommendations

Both Q8040K3TP and QJ8040K3TP are active production parts from Littelfuse Inc. with identical electrical and mechanical specifications. Selection between these parts may be based on inventory availability and supply chain considerations. The Q8040K3TP currently has 1028 pieces in stock, while the QJ8040K3TP has 1225 pieces available. Both parts carry ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements for industrial and commercial applications. The TO-218AC isolated package with through-hole mounting ensures compatibility with existing PCB designs and thermal management requirements. No performance differentiation exists between these parts based on provided specifications.

Frequently Asked Questions (FAQ)

Q: Can QJ8040K3TP be used as a direct replacement for Q8040K3TP?

A: Yes. The QJ8040K3TP is a parametric equivalent with identical electrical ratings (800V, 40A), gate trigger specifications (1.3V Vgt, 35mA Igt), hold current (60mA), surge current capability (420A/500A), operating temperature range (-40°C to 150°C), and TO-218AC package configuration. Direct substitution is supported without circuit modification.

Q: Are there any package or mounting differences between these parts?

A: No. Both parts use the TO-218-3 Isolated Tab package with TO-218AC supplier designation and through-hole mounting configuration. PCB footprint and thermal interface requirements are identical.

Q: What determines if a TRIAC can substitute for the Q8040K3TP?

A: Substitution requires matching all critical parameters: 800V off-state voltage, 40A on-state current, 1.3V maximum gate trigger voltage, 35mA maximum gate trigger current, 60mA maximum hold current, 420A/500A surge current rating, -40°C to 150°C operating temperature, and TO-218AC isolated package with through-hole mounting.

Q: Do both parts meet current regulatory compliance standards?

A: Yes. Both Q8040K3TP and QJ8040K3TP are ROHS3 compliant and REACH unaffected, meeting current environmental and hazardous substance regulations for industrial component applications.

Q: What is the difference between the part numbers Q8040K3TP and QJ8040K3TP?

A: The parts share the same base product number (QJ8040) and identical specifications. The designation difference reflects Littelfuse Inc. internal part numbering conventions but does not indicate functional or electrical differences.