Q2025K6TP TRIAC Alternistor Equivalent & Substitute Parts

Part Overview

The Q2025K6TP is a Littelfuse TRIAC Alternistor rated for 200 V off-state voltage and 25 A on-state current in a TO-218 Isolated Tab package. This component is classified as Obsolete, making identification of equivalent and substitute parts essential for ongoing design support and procurement planning. Substitute parts within this family maintain the same current rating and package configuration while offering alternative voltage ratings to accommodate different circuit requirements.

Substiute Parts

Q2025K6TP

Littelfuse Inc.In Stock: 1048Q2025K6TP Datasheet

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Q4025K6TP

Littelfuse Inc.In Stock: 2188Q4025K6TP Datasheet

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Q6025K6TP

Littelfuse Inc.In Stock: 3261Q6025K6TP Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the Q2025K6TP are selected based on the following criteria:

Common Parameters (Must Match):

• Triac Type: Alternistor - Snubberless
• Current - On State (It (RMS)) (Max): 25 A
• Voltage - Gate Trigger (Vgt) (Max): 1.3 V
• Current - Gate Trigger (Igt) (Max): 80 mA
• Current - Hold (Ih) (Max): 100 mA
• Configuration: Single
• Operating Temperature: -40°C ~ 125°C (TJ)
• Mounting Type: Through Hole
• Package / Case: TO-218-3 Isolated Tab, TO-218AC
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Variable Parameter (Allows Substitution):

• Voltage - Off State: 200 V, 400 V, or 600 V

The substitute parts Q4025K6TP and Q6025K6TP maintain electrical and mechanical compatibility with the Q2025K6TP while providing higher voltage ratings. These parts are suitable for applications requiring enhanced voltage withstand capability within the same current and package specifications.

Parameter Comparison

Engineering Selection Recommendations

Q4025K6TP (400 V Rating): This substitute provides a 2× voltage rating increase while maintaining all other electrical and mechanical specifications. The Q4025K6TP is classified as Active, ensuring continued availability and supply chain support. Selection is appropriate for applications where the original 200 V specification can accommodate higher voltage withstand capability without circuit redesign.

Q6025K6TP (600 V Rating): This substitute provides a 3× voltage rating increase and is also classified as Active. The Q6025K6TP is suitable for applications requiring maximum voltage margin within the Littelfuse Q-series 25 A TRIAC Alternistor family. Both substitute parts maintain identical gate trigger characteristics, hold current specifications, and thermal operating range.

Selection between Q4025K6TP and Q6025K6TP depends on circuit voltage requirements and design margin considerations. Both parts are ROHS3 compliant and carry identical moisture sensitivity ratings.

Frequently Asked Questions (FAQ)

Q: Can Q4025K6TP or Q6025K6TP be used as direct replacements for Q2025K6TP?

A: Yes, both substitute parts are mechanically and electrically compatible. They share identical current ratings (25 A), gate trigger specifications (1.3 V maximum), hold current (100 mA maximum), package configuration (TO-218-3 Isolated Tab), and operating temperature range (-40°C to 125°C). The primary difference is the off-state voltage rating: Q4025K6TP provides 400 V and Q6025K6TP provides 600 V compared to the original 200 V specification.

Q: What is the key difference between these substitute parts?

A: The only electrical parameter that differs among Q2025K6TP, Q4025K6TP, and Q6025K6TP is the Voltage - Off State rating. All other parameters, including current capacity, gate trigger voltage, hold current, surge current capability, temperature range, and package type, remain identical.

Q: Are both substitute parts currently available?

A: Yes. Q4025K6TP and Q6025K6TP are both classified as Active products. The original Q2025K6TP is Obsolete, making these substitutes the recommended options for new procurement and design support.

Q: Do the substitute parts require any circuit modifications?

A: No circuit modifications are required from an electrical standpoint. The higher voltage ratings of Q4025K6TP and Q6025K6TP are backward compatible with applications designed for the 200 V Q2025K6TP. However, circuit design should confirm that the selected voltage rating meets application requirements.

Q: Are all three parts RoHS compliant?

A: Yes. Q2025K6TP, Q4025K6TP, and Q6025K6TP are all ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.