Q2006VH3TP TRIAC Alternistor Equivalent & Substitute Parts

Part Overview

The Q2006VH3TP is a snubberless TRIAC Alternistor manufactured by Littelfuse Inc., rated for 200 V off-state voltage and 6 A on-state current in a TO-251 through-hole package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement 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.

Key Parameters

Parameter	Value
Manufacturer	Littelfuse Inc.
Category	Thyristors
Triac Type	Alternistor - Snubberless
Voltage - Off State	200 V
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
Mounting Type	Through Hole
Package / Case	TO-251-3 Short Leads, IPak, TO-251AA
Operating Temperature	-40°C ~ 125°C (TJ)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the Q2006VH3TP are selected based on the following criteria:

Manufacturer: Littelfuse Inc. (same manufacturer ensures design consistency)
Triac Type: Alternistor - Snubberless (functional equivalence)
Current Rating: 6 A on-state current (It (RMS)) (Max) (identical current handling)
Gate Trigger Parameters: Vgt (Max) 1.3 V, Igt (Max) 10 mA, Ih (Max) 15 mA (identical gate characteristics)
Mounting Type: Through Hole (same PCB integration method)
Package: TO-251-3 Short Leads, IPak, TO-251AA (identical footprint and lead configuration)
Operating Temperature: -40°C ~ 125°C (TJ) (identical thermal range)
RoHS Status: ROHS3 Compliant (regulatory compliance maintained)
Moisture Sensitivity Level: 1 (Unlimited) (identical handling requirements)

The substitute parts Q4006VH3TP and Q6006VH3TP differ only in off-state voltage rating (400 V and 600 V respectively), which represents an upgrade path for applications requiring higher voltage blocking capability while maintaining all other electrical and mechanical specifications.

Parameter Comparison

Parameter	Q2006VH3TP	Q4006VH3TP	Q6006VH3TP
Manufacturer	Littelfuse Inc.	Littelfuse Inc.	Littelfuse Inc.
Triac Type	Alternistor - Snubberless	Alternistor - Snubberless	Alternistor - Snubberless
Voltage - Off State	200 V	400 V	600 V
Current - On State (It (RMS)) (Max)	6 A	6 A	6 A
Voltage - Gate Trigger (Vgt) (Max)	1.3 V	1.3 V	1.3 V
Current - Non Rep. Surge 50, 60Hz (Itsm)	55A, 65A	55A, 65A	55A, 65A
Current - Gate Trigger (Igt) (Max)	10 mA	10 mA	10 mA
Current - Hold (Ih) (Max)	15 mA	15 mA	15 mA
Configuration	Single	Single	Single
Operating Temperature	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)
Mounting Type	Through Hole	Through Hole	Through Hole
Package / Case	TO-251-3 Short Leads, IPak, TO-251AA	TO-251-3 Short Leads, IPak, TO-251AA	TO-251-3 Short Leads, IPak, TO-251AA
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Obsolete	Active	Active

Engineering Selection Recommendations

Q4006VH3TP is an active product offering 400 V off-state voltage rating. This substitute is suitable for applications where the original 200 V specification can accommodate a higher voltage component, providing improved voltage margin and extended component availability through active manufacturing status.

Q6006VH3TP is an active product offering 600 V off-state voltage rating. This substitute provides the highest voltage rating among the three options and is suitable for applications requiring maximum voltage blocking capability while maintaining identical current handling and gate trigger characteristics.

Both substitute parts maintain ROHS3 compliance and MSL Level 1 rating, ensuring compatibility with standard manufacturing and storage requirements. The selection between Q4006VH3TP and Q6006VH3TP depends on the specific voltage requirements of the application circuit.

Frequently Asked Questions (FAQ)

Q: Can Q4006VH3TP or Q6006VH3TP be used as direct replacements for Q2006VH3TP?

A: Yes, both parts are direct pin-compatible replacements. They share identical current ratings (6 A), gate trigger parameters (Vgt 1.3 V max, Igt 10 mA max), package configuration (TO-251), and operating temperature range (-40°C to 125°C). The higher voltage ratings (400 V and 600 V) are backward compatible with 200 V applications.

Q: What is the primary difference between these three TRIAC models?

A: The sole difference is the off-state voltage rating: Q2006VH3TP is rated for 200 V, Q4006VH3TP for 400 V, and Q6006VH3TP for 600 V. All other electrical and mechanical parameters remain identical.

Q: Why is Q2006VH3TP marked as obsolete?

A: The Q2006VH3TP has been discontinued by the manufacturer. Q4006VH3TP and Q6006VH3TP remain in active production and are recommended for new designs and ongoing procurement.

Q: Are there any thermal or reliability differences between these parts?

A: No. All three parts share the same operating temperature range (-40°C to 125°C), thermal characteristics, and reliability specifications.

Q: What packaging options are available?

A: All three parts are supplied in TO-251-3 Short Leads (IPak/V-Pak) through-hole packages. Q2006VH3TP is available in bulk, while Q4006VH3TP and Q6006VH3TP are supplied in tube packaging.

Q: Are these parts RoHS compliant?

A: Yes, all three parts are ROHS3 compliant and have MSL Level 1 rating (unlimited moisture sensitivity).

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