Q4X3RP TRIAC Equivalent & Substitute Parts

Part Overview

The Q4X3RP is a Logic - Sensitive Gate TRIAC manufactured by Littelfuse Inc., rated for 400 V off-state voltage and 800 mA on-state current in a surface mount DO-214AA (Compak) package. This component is Active in product status and RoHS3 compliant. Equivalent and substitute parts are identified when they maintain functional compatibility across critical electrical parameters while accommodating application-specific requirements such as voltage rating, current capacity, and thermal performance.

Substiute Parts

Q4X3RP

Littelfuse Inc.In Stock: 2829Q4X3RP Datasheet

Current PartRFQ

Z0109MN,135

WeEn SemiconductorsIn Stock: 1087Z0109MN,135 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Q4X3RP is determined by the following critical parameters:

• Triac Type: Must be Logic - Sensitive Gate configuration
• Voltage - Off State: Substitute must equal or exceed 400 V
• Current - On State: Substitute must equal or exceed 800 mA
• Voltage - Gate Trigger (Vgt): Must not exceed 1.3 V for gate drive compatibility
• Current - Gate Trigger (Igt): Must not exceed 10 mA
• Current - Hold (Ih): Must not exceed 15 mA
• Mounting Type: Surface Mount required
• Compliance: RoHS and REACH status must be maintained

The substitute part Z0109MN,135 from WeEn Semiconductors meets these criteria with enhanced voltage rating (600 V) and current capacity (1 A), providing design margin while maintaining gate trigger characteristics within specification limits.

Parameter Comparison

Engineering Selection Recommendations

The Z0109MN,135 is a qualified substitute for the Q4X3RP based on the following factors:

• Both components are Active in product status with current manufacturing support
• Gate trigger voltage (Vgt) and gate trigger current (Igt) are identical, ensuring compatible gate drive circuits
• The substitute provides higher voltage rating (600 V vs. 400 V) and increased current capacity (1 A vs. 800 mA), offering design margin for applications with variable load conditions
• Both components maintain RoHS compliance and REACH unaffected status
• Surface mount configuration is preserved across both parts
• The substitute's hold current (Ih) of 10 mA is lower than the main part's 15 mA specification, which may improve latching behavior in sensitive gate applications

Package differences exist: Q4X3RP uses DO-214AA (Compak), while Z0109MN,135 uses SC-73 (TO-261-4). PCB layout and thermal management considerations must account for this package transition.

Frequently Asked Questions (FAQ)

Q: Can Z0109MN,135 be used as a direct replacement for Q4X3RP?

A: Z0109MN,135 is functionally compatible as a substitute based on gate trigger characteristics and triac type. However, package differences (DO-214AA vs. SC-73) require PCB layout modification. Electrical performance is maintained or improved across all critical parameters.

Q: What are the key differences between these parts?

A: The primary differences are voltage rating (400 V vs. 600 V), on-state current capacity (800 mA vs. 1 A), hold current (15 mA vs. 10 mA), and package type. Gate trigger parameters remain identical, ensuring circuit compatibility.

Q: Does the higher voltage rating of Z0109MN,135 affect circuit operation?

A: No. The higher voltage rating provides additional design margin and does not negatively impact circuit operation in applications rated for 400 V. The component will function correctly at or below its rated voltage.

Q: Are there thermal management differences between these packages?

A: Package geometry differs between DO-214AA (Compak) and SC-73 (TO-261-4). Thermal performance and PCB footprint requirements must be evaluated for the specific application. Consult package datasheets for thermal resistance specifications.

Q: What compliance certifications apply to both parts?

A: Both Q4X3RP and Z0109MN,135 are RoHS compliant and REACH unaffected. Q4X3RP carries RoHS3 certification, while Z0109MN,135 carries RoHS certification. Both are classified under ECCN EAR99 and HTSUS 8541.30.0080.