Q2004D4TP TRIAC Equivalent & Substitute Parts

Part Overview

The Q2004D4TP is a standard TRIAC manufactured by Littelfuse Inc., rated for 200V off-state voltage and 4A on-state current in a Surface Mount TO-252 (DPAK) package. This component is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing design support and production continuity. Active alternatives with identical or enhanced electrical characteristics are available from the same manufacturer within the same package family.

Substiute Parts

Q2004D4TP

Littelfuse Inc.In Stock: 826Q2004D4TP Datasheet

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Q4004D4TP

Littelfuse Inc.In Stock: 755Q4004D4TP Datasheet

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Q6004D4TP

Littelfuse Inc.In Stock: 1037Q6004D4TP Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the Q2004D4TP are selected based on strict electrical and mechanical compatibility criteria. The following parameters determine valid substitution:

• Package / Case: TO-252-3, DPAK (2 Leads + Tab), SC-63 (identical mechanical footprint required)
• Mounting Type: Surface Mount (identical assembly process)
• Current - On State (It (RMS)) (Max): 4 A (identical or higher current rating)
• Voltage - Gate Trigger (Vgt) (Max): 1.3 V (identical gate trigger voltage)
• Current - Gate Trigger (Igt) (Max): 25 mA (identical maximum gate trigger current)
• Current - Hold (Ih) (Max): 30 mA (identical hold current)
• Operating Temperature: -40°C ~ 125°C (TJ) (identical thermal range)
• Configuration: Single (identical configuration)
• Triac Type: Standard (identical functional classification)

The Q4004D4TP and Q6004D4TP are direct substitutes with enhanced voltage ratings (400V and 600V respectively) while maintaining all other electrical and mechanical parameters. Both substitute parts are Active products with current manufacturing status, ensuring long-term availability and supply chain stability.

Parameter Comparison

Engineering Selection Recommendations

The Q4004D4TP and Q6004D4TP are qualified substitutes for the obsolete Q2004D4TP. Both alternatives maintain identical electrical performance for gate trigger characteristics, on-state current, hold current, and operating temperature range. The primary difference is the off-state voltage rating: Q4004D4TP provides 400V capability, while Q6004D4TP provides 600V capability, compared to the original 200V rating.

Both substitute parts are Active products with current manufacturing status, ensuring supply chain continuity and long-term availability. Both are ROHS3 Compliant and carry MSL 1 (Unlimited) moisture sensitivity classification, matching the original part's compliance profile. The identical TO-252-3 DPAK package ensures direct mechanical and electrical compatibility with existing PCB layouts and assembly processes.

Selection between Q4004D4TP and Q6004D4TP depends on the application's voltage requirements. If the circuit operates at or below 200V, either substitute is acceptable. If the circuit requires higher voltage margin or operates above 200V, the appropriate higher-voltage rated part must be selected based on actual circuit voltage specifications.

Frequently Asked Questions (FAQ)

Q: Can Q4004D4TP or Q6004D4TP be used as direct replacements for Q2004D4TP?

A: Yes. Both parts are direct substitutes with identical gate trigger voltage (1.3V max), on-state current (4A max), hold current (30mA max), and operating temperature range (-40°C to 125°C). The package, mounting type, and all control characteristics are identical. The higher voltage ratings (400V and 600V) do not prevent operation in 200V circuits.

Q: What is the difference between Q4004D4TP and Q6004D4TP?

A: The primary difference is the off-state voltage rating. Q4004D4TP is rated for 400V, while Q6004D4TP is rated for 600V. All other electrical parameters, including gate trigger voltage, on-state current, and hold current, are identical. Both are suitable for applications originally designed for the 200V Q2004D4TP.

Q: Are the substitute parts available in the same package?

A: Yes. Both Q4004D4TP and Q6004D4TP use the identical TO-252-3 DPAK (2 Leads + Tab) package with SC-63 designation. No PCB layout or assembly process changes are required.

Q: What is the product status of the substitute parts?

A: Both Q4004D4TP and Q6004D4TP are Active products with current manufacturing status. The original Q2004D4TP is classified as Obsolete, making these active alternatives essential for design continuity.

Q: Do the substitute parts meet the same compliance standards?

A: Yes. Both Q4004D4TP and Q6004D4TP are ROHS3 Compliant with MSL 1 (Unlimited) moisture sensitivity classification, matching the original part's compliance profile.

Q: Can I use a higher voltage-rated TRIAC in a lower voltage application?

A: Yes. A TRIAC rated for higher off-state voltage can be used in applications requiring lower voltage. The gate trigger voltage, on-state current, and hold current remain identical across all three parts, ensuring functional compatibility in the original circuit design.