Q2004D3RP TRIAC Equivalent & Substitute Parts

Part Overview

The Q2004D3RP is a Logic-Sensitive Gate 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 equivalent and substitute parts necessary for ongoing design support and procurement.

The Q2004D3RP serves as a general-purpose thyristor for AC switching applications requiring sensitive gate triggering. Due to its obsolete status, alternative TRIAC models with compatible electrical and mechanical characteristics are available to maintain design continuity.

Substiute Parts

Q2004D3RP

Littelfuse Inc.In Stock: 3931Q2004D3RP Datasheet

Current PartRFQ

Q4004D3RP

Littelfuse Inc.In Stock: 7192Q4004D3RP Datasheet

UpgradeRFQ

Q6004D3RP

Littelfuse Inc.In Stock: 3949Q6004D3RP Datasheet

UpgradeRFQ

BT137S-600E,118

WeEn SemiconductorsIn Stock: 23197BT137S-600E,118 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the Q2004D3RP is determined by the following criteria:

Electrical Compatibility Parameters:

• Voltage - Off State: Must be equal to or greater than 200V
• Current - On State (It (RMS)): Must be equal to or greater than 4A
• Voltage - Gate Trigger (Vgt): Must not exceed 1.3V
• Current - Gate Trigger (Igt): Must not exceed 10 mA
• Current - Hold (Ih): Must not exceed 20 mA
• Operating Temperature Range: Must encompass -40°C to 125°C

Mechanical Compatibility Parameters:

• Package / Case: TO-252-3 DPAK (2 Leads + Tab)
• Mounting Type: Surface Mount
• Configuration: Single

Compliance Parameters:

• RoHS Status: ROHS3 Compliant or equivalent

Substitute parts are grouped into two categories: Littelfuse direct upgrades (Q4004D3RP, Q6004D3RP) and manufacturer-recommended alternatives (BT137S-600E,118). All listed substitutes maintain identical package geometry and pin configuration, enabling direct PCB replacement.

Parameter Comparison

Engineering Selection Recommendations

Q4004D3RP (Littelfuse Upgrade): This part maintains identical current and gate trigger specifications while increasing off-state voltage to 400V. It is manufactured by Littelfuse Inc. and carries Active product status with ROHS3 compliance. Selection is appropriate for applications requiring higher voltage margin within the same current rating.

Q6004D3RP (Littelfuse Upgrade): This part provides the highest off-state voltage rating at 600V while maintaining 4A current capacity and identical gate trigger characteristics. It is manufactured by Littelfuse Inc. and carries Active product status with ROHS3 compliance. Selection is appropriate for applications requiring maximum voltage headroom.

BT137S-600E,118 (WeEn Semiconductors Alternative): This part offers 600V off-state voltage with doubled on-state current capacity (8A) and is manufactured by WeEn Semiconductors with Active product status and RoHS compliance. The gate trigger voltage specification is 1.5V (0.2V higher than the original). Selection is appropriate for applications requiring higher current capacity or when WeEn Semiconductors supply chain availability is preferred.

All substitute parts maintain TO-252 DPAK package compatibility and Surface Mount configuration, enabling direct PCB replacement without layout modification.

Frequently Asked Questions (FAQ)

Q: Can Q4004D3RP directly replace Q2004D3RP?

A: Yes. Q4004D3RP maintains identical on-state current (4A), gate trigger voltage (1.3V maximum), and gate trigger current (10 mA maximum) specifications. The increased off-state voltage (400V vs. 200V) provides additional voltage margin and is electrically compatible with circuits designed for 200V operation. Package and pin configuration are identical.

Q: What is the primary difference between Q6004D3RP and BT137S-600E,118?

A: Both parts are rated for 600V off-state voltage. Q6004D3RP maintains the original 4A on-state current and 1.3V gate trigger voltage. BT137S-600E,118 provides doubled on-state current (8A) and has a gate trigger voltage specification of 1.5V. Selection depends on circuit current requirements and gate drive circuit compatibility.

Q: Is the BT137S-600E,118 suitable for direct replacement in all applications?

A: BT137S-600E,118 is mechanically and electrically compatible for direct PCB replacement. However, the gate trigger voltage specification is 1.5V compared to 1.3V for the original part. Circuits with marginal gate drive voltage should be evaluated to confirm adequate triggering margin.

Q: Are all substitute parts available in the same packaging options?

A: Q4004D3RP is available in Cut Tape (CT) packaging. Q6004D3RP and BT137S-600E,118 are available in Tape & Reel (TR) packaging. All parts use identical TO-252-3 DPAK case geometry suitable for Surface Mount assembly.

Q: What is the operating temperature range difference for BT137S-600E,118?

A: BT137S-600E,118 specifies a maximum junction temperature of 125°C without a minimum temperature specification in the provided data. The original Q2004D3RP and Littelfuse alternatives specify -40°C to 125°C operating range. Applications requiring operation below 0°C should use Q4004D3RP or Q6004D3RP.

Q: Are all substitute parts RoHS compliant?

A: Yes. Q2004D3RP, Q4004D3RP, and Q6004D3RP are ROHS3 Compliant. BT137S-600E,118 is RoHS Compliant. All parts meet environmental compliance requirements for current manufacturing standards.