ZRC400F03TA Equivalent & Substitute Parts

Part Overview

The ZRC400F03TA is a shunt voltage reference IC manufactured by Diodes Incorporated, designed to provide a fixed 4.096V output with ±3% tolerance in a compact SOT-23-3 surface mount package. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity. The part operates across the industrial temperature range of -40°C to 85°C and is suitable for precision voltage reference applications requiring low output impedance and stable performance.

Substiute Parts

ZRC400F03TA

Diodes IncorporatedIn Stock: 1326ZRC400F03TA Datasheet

Current PartRFQ

LM4040D41IDBZR

Texas InstrumentsIn Stock: 3483LM4040D41IDBZR Datasheet

MFR RecommendedRFQ

LM4040D41IDBZT

Texas InstrumentsIn Stock: 1025LM4040D41IDBZT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ZRC400F03TA is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Fixed output voltage of 4.096V (exact match required)
• Shunt reference topology (functional equivalence)
• Operating temperature range of -40°C to 85°C (minimum requirement)
• SOT-23-3 package compatibility (mechanical and thermal equivalence)
• Surface mount technology (assembly process compatibility)

Acceptable Parameter Variations:

• Output current tolerance: Substitute parts may exceed the original 5 mA specification, provided the application circuit can accommodate higher current draw
• Voltage tolerance: Substitute parts with ±1% tolerance are acceptable as they represent improved performance over the original ±3% specification
• Temperature coefficient: Substitute parts with higher temperature coefficients (150 ppm/°C vs. 90 ppm/°C) are acceptable for applications not requiring extreme thermal stability
• Noise specifications: Substitute parts with lower noise performance are acceptable

The Texas Instruments LM4040D41IDBZR and LM4040D41IDBZT meet all substitution criteria, differing only in packaging format (Cut Tape vs. Tape & Reel) while maintaining identical electrical specifications.

Parameter Comparison

Engineering Selection Recommendations

Both LM4040D41IDBZR and LM4040D41IDBZT are direct functional equivalents to the obsolete ZRC400F03TA. Selection between these two substitute parts is determined by packaging and supply chain requirements:

LM4040D41IDBZR (Cut Tape & Digi-Reel® Packaging): Suitable for applications requiring flexible order quantities and lower minimum purchase commitments. Current inventory: 3450 pcs.

LM4040D41IDBZT (Tape & Reel Packaging): Suitable for high-volume production environments with automated assembly processes. Current inventory: 962 pcs.

Both parts are manufactured by Texas Instruments, maintain active product status, and carry ROHS3 compliance certification. The improved tolerance specification (±1% vs. ±3%) and lower noise performance (80 µVrms vs. 90 µVrms) of the substitute parts provide enhanced circuit performance without requiring design modifications.

Frequently Asked Questions (FAQ)

Q: Can LM4040D41IDBZR and LM4040D41IDBZT be used interchangeably with ZRC400F03TA?

A: Yes. Both parts provide identical electrical performance and are housed in the same SOT-23-3 package. The only difference is packaging format: Cut Tape vs. Tape & Reel. Selection depends on assembly process requirements and order quantity.

Q: What is the impact of the higher output current specification (15 mA vs. 5 mA) in the substitute parts?

A: The substitute parts can supply higher current while maintaining voltage regulation. This does not affect compatibility with existing circuit designs. Applications drawing less than 5 mA will operate identically to the original part.

Q: Are the improved tolerance and noise specifications of the substitute parts compatible with the original design?

A: Yes. The ±1% tolerance and 80 µVrms noise of the substitute parts represent performance improvements over the original ±3% tolerance and 90 µVrms noise. No circuit modifications are required.

Q: Does the higher temperature coefficient (150 ppm/°C vs. 90 ppm/°C) affect circuit performance?

A: The temperature coefficient difference is acceptable for applications operating within the -40°C to 85°C range. For designs requiring extreme thermal stability, circuit-level compensation may be evaluated, though the substitute parts remain functionally equivalent.

Q: Are both substitute parts ROHS3 compliant?

A: Yes. Both LM4040D41IDBZR and LM4040D41IDBZT are ROHS3 compliant and suitable for applications with environmental compliance requirements.