Q2006DH3TP TRIAC Alternistor 200V 6A Equivalent & Substitute Parts

Part Overview

The Q2006DH3TP is a snubberless TRIAC Alternistor manufactured by Littelfuse Inc., rated for 200V off-state voltage and 6A on-state current in a surface mount TO-252 (DPAK) package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. Substitute parts maintain the same current rating and package configuration while offering higher voltage ratings for applications requiring enhanced voltage margin or different system specifications.

Substiute Parts

Q2006DH3TP

Littelfuse Inc.In Stock: 732Q2006DH3TP Datasheet

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Q4006DH3TP

Littelfuse Inc.In Stock: 881Q4006DH3TP Datasheet

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Q6006DH3TP

Littelfuse Inc.In Stock: 744Q6006DH3TP Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the Q2006DH3TP are selected based on strict electrical and mechanical compatibility criteria. The following parameters must remain constant or be compatible across all substitute parts:

• Current - On State (It (RMS)) (Max): 6 A
• Voltage - Gate Trigger (Vgt) (Max): 1.3 V
• Current - Gate Trigger (Igt) (Max): 10 mA
• Current - Hold (Ih) (Max): 15 mA
• Current - Non Rep. Surge 50, 60Hz (Itsm): 55A, 65A
• Configuration: Single
• Operating Temperature: -40°C ~ 125°C (TJ)
• Mounting Type: Surface Mount
• Package / Case: TO-252-3, DPAK (2 Leads + Tab), SC-63
• Triac Type: Alternistor - Snubberless

The primary variable parameter across substitute parts is Voltage - Off State, which increases from 200V to 400V and 600V. These higher voltage ratings provide design flexibility for applications with different system voltage requirements while maintaining identical current handling and thermal characteristics.

Parameter Comparison

Engineering Selection Recommendations

The Q2006DH3TP is obsolete; therefore, substitute parts Q4006DH3TP and Q6006DH3TP are recommended for new designs and production continuity. Both substitute parts maintain active product status with Littelfuse Inc.

Q4006DH3TP (400V rating) is suitable for applications where the system voltage specification is 400V or where a 2x voltage margin over the original 200V design is acceptable.

Q6006DH3TP (600V rating) is suitable for applications where the system voltage specification is 600V or where a 3x voltage margin over the original 200V design is required.

Both substitute parts are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating, matching the original part's environmental compliance profile. All three parts share identical current handling, gate trigger characteristics, and thermal operating range, ensuring functional equivalence within their respective voltage ratings.

Frequently Asked Questions (FAQ)

Q: Can Q4006DH3TP or Q6006DH3TP be used as direct replacements for Q2006DH3TP?

A: Yes, both parts are direct replacements from an electrical and mechanical standpoint. The primary difference is the off-state voltage rating. Q4006DH3TP provides 400V rating, and Q6006DH3TP provides 600V rating, compared to the original 200V. All other electrical parameters, including current ratings, gate trigger characteristics, and thermal specifications, are identical. Package configuration and mounting type are identical across all three parts.

Q: What is the key difference between these three TRIAC parts?

A: The off-state voltage rating is the primary differentiator. Q2006DH3TP is rated for 200V, Q4006DH3TP for 400V, and Q6006DH3TP for 600V. All other specifications—6A on-state current, 1.3V gate trigger voltage, 10mA gate trigger current, and 15mA hold current—remain constant across all three parts.

Q: Why is Q2006DH3TP obsolete while Q4006DH3TP and Q6006DH3TP are active?

A: Product status reflects manufacturer availability and production decisions. Q4006DH3TP and Q6006DH3TP are currently in active production by Littelfuse Inc., making them the recommended choices for new designs and ongoing production requirements.

Q: Are there any compliance or environmental differences between these parts?

A: No. All three parts are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating. Environmental compliance and handling requirements are identical across all three parts.

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

A: Yes. A higher voltage-rated TRIAC can be used in a lower voltage application without electrical degradation. The higher voltage rating provides additional voltage margin and does not affect the part's performance in lower voltage circuits, provided all other electrical parameters remain within specification.

Q: Are the packages identical for all three parts?

A: Yes. All three parts use the TO-252-3 DPAK (2 Leads + Tab) SC-63 package. PCB footprints and mounting procedures are identical, allowing direct board-level substitution without layout modifications.