Q2008VH3TP TRIAC Alternistor Equivalent & Substitute Parts

Part Overview

The Q2008VH3TP is a Littelfuse TRIAC Alternistor rated for 200 V off-state voltage and 8 A on-state current in a TO-251 through-hole package. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Substitute parts maintain the same current rating and package configuration while offering higher voltage ratings and active product status.

Substiute Parts

Q2008VH3TP

LittelfuseIn Stock: 818Q2008VH3TP Datasheet

Current PartRFQ

Q4008VH3TP

Littelfuse Inc.In Stock: 1014Q4008VH3TP Datasheet

UpgradeRFQ

Q6008VH3TP

Littelfuse Inc.In Stock: 1427Q6008VH3TP Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the Q2008VH3TP are selected based on the following criteria:

Maintained Parameters (Substitution Basis):

• Current - On State (It (RMS)) (Max): 8 A
• Voltage - Gate Trigger (Vgt) (Max): 1.3 V
• Current - Gate Trigger (Igt) (Max): 10 mA
• Current - Hold (Ih) (Max): 15 mA
• Operating Temperature: -40°C ~ 125°C (TJ)
• Mounting Type: Through Hole
• Package / Case: TO-251-3 Short Leads, IPak, TO-251AA
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Variable Parameter (Upgrade Path):

• Voltage - Off State: 400 V (Q4008VH3TP), 600 V (Q6008VH3TP)

The substitute parts Q4008VH3TP and Q6008VH3TP are higher voltage rated variants of the same TRIAC Alternistor family. These parts are pin-compatible, mechanically identical, and maintain all electrical characteristics except for increased off-state voltage ratings. Both substitute parts carry active product status and full compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

For Q2008VH3TP Replacement:

The Q2008VH3TP is obsolete. Direct substitution is not available at the same voltage rating. Selection between Q4008VH3TP and Q6008VH3TP depends on circuit voltage requirements:

• Q4008VH3TP is suitable for applications requiring 400 V off-state voltage rating. This part carries active product status and ROHS3 compliance with REACH Unaffected certification.

• Q6008VH3TP is suitable for applications requiring 600 V off-state voltage rating. This part carries active product status and ROHS3 compliance with REACH Unaffected certification.

Both substitute parts are electrically and mechanically compatible with the original Q2008VH3TP in terms of gate trigger characteristics, on-state current, hold current, operating temperature range, and package configuration. The higher voltage ratings provide design margin and extended application flexibility.

Frequently Asked Questions (FAQ)

Q: Can Q4008VH3TP or Q6008VH3TP be used as direct replacements for Q2008VH3TP?

A: Yes, both parts are pin-compatible and mechanically identical in the TO-251 package. All gate trigger, on-state current, hold current, and operating temperature specifications are identical. The difference is the off-state voltage rating: Q4008VH3TP provides 400 V and Q6008VH3TP provides 600 V compared to the original 200 V rating.

Q: What is the difference between Q4008VH3TP and Q6008VH3TP?

A: The only electrical difference is the off-state voltage rating. Q4008VH3TP is rated for 400 V and Q6008VH3TP is rated for 600 V. All other parameters, including current ratings, gate trigger characteristics, and package configuration, are identical.

Q: Are the substitute parts available in the same packaging as the original?

A: Yes. Q4008VH3TP and Q6008VH3TP are both supplied in TO-251 (V-Pak/I-Pak) through-hole packages with TO-251-3 Short Leads configuration, identical to the Q2008VH3TP.

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

A: Yes. Both Q4008VH3TP and Q6008VH3TP are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level. Q4008VH3TP and Q6008VH3TP both carry REACH Unaffected status.

Q: Which substitute part should I select for my application?

A: Select based on your circuit's maximum voltage requirement. If your circuit operates at or below 400 V, use Q4008VH3TP. If your circuit requires higher voltage margin or operates above 400 V, use Q6008VH3TP. Both parts are active products with full availability.