Q2004V4TP TRIAC Equivalent & Substitute Parts

Part Overview

The Q2004V4TP is a standard TRIAC manufactured by Littelfuse Inc., rated for 200V off-state voltage and 4A 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. The substitute parts listed maintain identical current ratings and package configurations while offering higher voltage ratings for applications requiring enhanced voltage headroom or system redesign flexibility.

Key Parameters

Parameter	Value
Manufacturer Part Number	Q2004V4TP
Manufacturer	Littelfuse Inc.
Category	Thyristors
Description	TRIAC 200V 4A TO251
Triac Type	Standard
Voltage - Off State	200 V
Current - On State (It (RMS)) (Max)	4 A
Voltage - Gate Trigger (Vgt) (Max)	1.3 V
Current - Gate Trigger (Igt) (Max)	25 mA
Current - Hold (Ih) (Max)	30 mA
Operating Temperature	-40°C ~ 125°C (TJ)
Mounting Type	Through Hole
Package / Case	TO-251-3 Short Leads, IPak, TO-251AA
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the Q2004V4TP is determined by the following criteria:

Mandatory Matching Parameters:

Current - On State (It (RMS)) (Max): 4 A
Voltage - Gate Trigger (Vgt) (Max): 1.3 V
Current - Gate Trigger (Igt) (Max): 25 mA
Current - Hold (Ih) (Max): 30 mA
Operating Temperature: -40°C ~ 125°C (TJ)
Mounting Type: Through Hole
Package / Case: TO-251-3 Short Leads, IPak, TO-251AA
Triac Type: Standard
Configuration: Single

Allowable Variation:

Voltage - Off State: Higher ratings are acceptable for direct substitution, as they provide backward compatibility with lower voltage applications while offering enhanced voltage margin.

Both substitute parts (Q4004V4TP and Q6004V4TP) meet all mandatory matching parameters and differ only in off-state voltage rating, making them suitable replacements for the obsolete Q2004V4TP.

Parameter Comparison

Parameter	Q2004V4TP (Main)	Q4004V4TP (Substitute)	Q6004V4TP (Substitute)
Manufacturer	Littelfuse Inc.	Littelfuse Inc.	Littelfuse Inc.
Triac Type	Standard	Standard	Standard
Voltage - Off State	200 V	400 V	600 V
Current - On State (It (RMS)) (Max)	4 A	4 A	4 A
Voltage - Gate Trigger (Vgt) (Max)	1.3 V	1.3 V	1.3 V
Current - Gate Trigger (Igt) (Max)	25 mA	25 mA	25 mA
Current - Hold (Ih) (Max)	30 mA	30 mA	30 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
Product Status	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Q4004V4TP Selection: The Q4004V4TP provides a 400V off-state voltage rating while maintaining all other electrical and mechanical specifications identical to the Q2004V4TP. This part is in active product status and ROHS3 compliant. Selection of this substitute is appropriate for applications where the original 200V rating is sufficient and a moderate voltage margin is desired.

Q6004V4TP Selection: The Q6004V4TP provides a 600V off-state voltage rating while maintaining all other electrical and mechanical specifications identical to the Q2004V4TP. This part is in active product status and ROHS3 compliant. Selection of this substitute is appropriate for applications requiring maximum voltage headroom or for designs operating in higher voltage environments.

Both substitute parts are manufactured by Littelfuse Inc. and carry identical compliance certifications to the original part. The choice between Q4004V4TP and Q6004V4TP depends solely on the maximum voltage the application will encounter.

Frequently Asked Questions (FAQ)

Q: Can Q4004V4TP or Q6004V4TP be used as direct replacements for Q2004V4TP?

A: Yes. Both substitute parts maintain identical on-state current (4A), gate trigger voltage (1.3V maximum), gate trigger current (25mA maximum), hold current (30mA maximum), operating temperature range (-40°C to 125°C), and package configuration (TO-251). The higher off-state voltage ratings provide backward compatibility with the original 200V application while offering additional voltage margin.

Q: What is the difference between Q4004V4TP and Q6004V4TP?

A: The only difference is the off-state voltage rating. Q4004V4TP is rated for 400V, while Q6004V4TP is rated for 600V. All other electrical parameters and package specifications are identical.

Q: Why is the Q2004V4TP listed as obsolete?

A: The Q2004V4TP has been discontinued by the manufacturer. The Q4004V4TP and Q6004V4TP are active alternatives that provide equivalent functionality with higher voltage ratings.

Q: Are there any package differences between these parts?

A: No. All three parts use the TO-251-3 Short Leads package (IPak, TO-251AA) with through-hole mounting. They are mechanically and electrically interchangeable at the board level.

Q: Do all three parts meet RoHS compliance?

A: Yes. The Q2004V4TP, Q4004V4TP, and Q6004V4TP are all ROHS3 compliant.

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