Q2004V3 Equivalent & Substitute Parts

Part Overview

The Q2004V3 is a Logic - Sensitive Gate TRIAC rated for 200 V off-state voltage and 4 A on-state current, manufactured by Littelfuse Inc. in a TO-251 through-hole package. This component is discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing design requirements and procurement. The part operates across an industrial temperature range of -40°C to 125°C and is RoHS3 compliant.

Substiute Parts

Q2004V3

Littelfuse Inc.In Stock: 897Q2004V3 Datasheet

Current PartRFQ

BT134-600E,127

WeEn SemiconductorsIn Stock: 12575BT134-600E,127 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Q2004V3 is determined by the following critical parameters:

• Triac Type: Must be Logic - Sensitive Gate configuration
• Current Rating: On-state current must be 4 A or greater
• Gate Trigger Characteristics: Voltage gate trigger (Vgt) and current gate trigger (Igt) must be compatible with existing circuit design
• Hold Current (Ih): Must not exceed circuit requirements
• Temperature Range: Must support the operating environment
• Mounting Type: Through-hole configuration required for PCB compatibility
• Compliance: RoHS3 compliance required

The BT134-600E,127 qualifies as a substitute based on matching the Logic - Sensitive Gate type, 4 A current rating, compatible gate trigger specifications, and RoHS3 compliance. The higher off-state voltage rating (600 V vs. 200 V) provides additional design margin and does not compromise functionality in applications rated for 200 V operation.

Parameter Comparison

Engineering Selection Recommendations

The BT134-600E,127 is an active product from WeEn Semiconductors with confirmed inventory availability, addressing the discontinuation status of the Q2004V3. Both components meet RoHS3 compliance requirements. The substitute maintains the 4 A current rating and Logic - Sensitive Gate configuration essential for circuit function. The gate trigger voltage specification of the BT134-600E,127 (1.5 V maximum) is marginally higher than the Q2004V3 (1.3 V maximum) and must be verified against circuit gate drive capabilities. The higher off-state voltage rating of the BT134-600E,127 (600 V) provides additional overvoltage margin in applications designed for 200 V operation. Package differences (TO-251-3 versus SOT-82) require PCB layout verification for pin compatibility and thermal performance.

Frequently Asked Questions (FAQ)

Q: Can the BT134-600E,127 directly replace the Q2004V3 in existing designs?

A: Direct replacement requires verification of gate drive circuit compatibility due to the 0.2 V difference in gate trigger voltage specification and package pin configuration differences between TO-251-3 and SOT-82 packages.

Q: Why is the substitute rated for 600 V when the original part is 200 V?

A: Higher voltage ratings do not compromise functionality in lower-voltage applications. The 600 V rating provides additional design margin and overvoltage protection without affecting normal operation at 200 V.

Q: Are there thermal considerations when switching packages?

A: Package geometry differences between TO-251-3 and SOT-82 may affect thermal dissipation characteristics. PCB layout and thermal management design should be reviewed for the specific application.

Q: What is the minimum gate trigger current required?

A: Both the Q2004V3 and BT134-600E,127 specify a maximum gate trigger current (Igt) of 10 mA. Circuit design must ensure gate drive capability meets this requirement.

Q: Is the BT134-600E,127 available in the same packaging as the Q2004V3?

A: No. The Q2004V3 uses TO-251-3 packaging while the BT134-600E,127 uses SOT-82 packaging. Pin configuration and PCB footprint must be verified for compatibility.