LM4040C41QFTA Equivalent & Substitute Parts

Part Overview

The LM4040C41QFTA is a shunt voltage reference IC manufactured by Diodes Incorporated, designed to provide a fixed 4.1V output with ±0.5% tolerance. This component operates as a precision voltage reference in power management applications, with automotive-grade qualification (AEC-Q100) and active product status. Alternative part numbers within the same product family are available to support supply chain flexibility and inventory optimization while maintaining identical electrical and mechanical specifications.

Substiute Parts

LM4040C41QFTA

Diodes IncorporatedIn Stock: 3133LM4040C41QFTA Datasheet

Current PartRFQ

LM4040C41FTA

Diodes IncorporatedIn Stock: 4176LM4040C41FTA Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The LM4040C41QFTA has one parametric equivalent substitute: LM4040C41FTA. Both parts are manufactured by Diodes Incorporated and share identical electrical and mechanical specifications. Substitution is valid based on the following matching criteria:

• Reference Type: Shunt (identical)
• Output Voltage: 4.1V fixed (identical)
• Tolerance: ±0.5% (identical)
• Temperature Coefficient: 100ppm/°C (identical)
• Noise Performance: 64µVrms at 10Hz to 10kHz (identical)
• Current Ratings: 15 mA output, 88 µA cathode (identical)
• Operating Temperature Range: -40°C ~ 125°C (identical)
• Package: SOT-23-3 (identical)
• Automotive Grade: AEC-Q100 qualified (identical)
• Compliance: ROHS3 Compliant, REACH Unaffected (identical)

The difference between these part numbers reflects packaging format variations (Tape & Reel designation) and does not affect functional performance or electrical characteristics.

Parameter Comparison

Engineering Selection Recommendations

Both the LM4040C41QFTA and LM4040C41FTA are active products with identical electrical performance and automotive-grade qualification. Selection between these parts is based on packaging and supply chain requirements rather than functional differences. Both components meet ROHS3 compliance and REACH requirements, making them suitable for applications requiring regulatory adherence. The automotive AEC-Q100 qualification ensures reliability in temperature-sensitive environments across the -40°C to 125°C operating range.

Frequently Asked Questions (FAQ)

Q: Can LM4040C41FTA be used as a direct replacement for LM4040C41QFTA?

A: Yes. Both parts are parametric equivalents with identical electrical specifications, voltage output, tolerance, temperature coefficient, and package configuration. The difference in part number designation reflects packaging format variation only.

Q: Are there any differences in the SOT-23-3 package between these parts?

A: No. Both parts use the identical SOT-23-3 package (also designated TO-236-3 or SC-59), ensuring mechanical and electrical compatibility in PCB layouts.

Q: Do both parts meet automotive qualification requirements?

A: Yes. Both the LM4040C41QFTA and LM4040C41FTA carry AEC-Q100 automotive-grade qualification and are suitable for automotive applications.

Q: What is the significance of the part number suffix difference?

A: The suffix variation (QFTA vs. FTA) indicates different packaging formats or distribution channels from Diodes Incorporated. Electrical and functional performance remain identical.

Q: Are moisture sensitivity considerations the same for both parts?

A: Yes. Both parts have MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

Q: Can these parts be used interchangeably in production?

A: Yes, provided that supply chain and inventory management systems accommodate the part number variation. Electrical performance, thermal characteristics, and compliance certifications are identical.