ZRC400F02TC Equivalent & Substitute Parts

Part Overview

The ZRC400F02TC is a shunt voltage reference IC manufactured by Diodes Incorporated, designed to provide a fixed 4.096V output with ±2% tolerance in a compact SOT-23-3 surface mount package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The part delivers 5 mA output current with a temperature coefficient of 90 ppm/°C and operates across the industrial temperature range of -40°C to 85°C.

Key Parameters

Parameter	Value
Reference Type	Shunt
Output Type	Fixed
Voltage - Output (Min/Fixed)	4.096V
Current - Output	5 mA
Tolerance	±2%
Temperature Coefficient	90 ppm/°C
Noise - 10Hz to 10kHz	90 µVrms
Current - Cathode	23 µA
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	TO-236-3, SC-59, SOT-23-3
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the ZRC400F02TC is determined by the following critical parameters: fixed 4.096V output voltage, shunt reference type, SOT-23-3 package compatibility, surface mount capability, and operating temperature range of -40°C to 85°C. All substitute parts must maintain the same output voltage and package form factor to ensure direct replacement in existing PCB layouts.

Substitute parts are grouped into two categories:

Parametric Equivalent: ZRC400F02TA maintains identical electrical specifications (4.096V, ±2% tolerance, 5 mA output, 90 ppm/°C temperature coefficient) and differs only in packaging format (Tape & Reel versus individual packaging). This part is functionally interchangeable with no circuit redesign required.

Manufacturer Recommended Alternatives: LM4040D41IDBZR and LM4040D41IDBZT are Texas Instruments shunt voltage reference ICs with the same 4.096V output voltage and SOT-23-3 package. These parts offer improved tolerance (±1% versus ±2%) and higher output current capability (15 mA versus 5 mA), making them suitable for applications requiring greater current delivery or tighter voltage accuracy.

Parameter Comparison

Parameter	ZRC400F02TC	ZRC400F02TA	LM4040D41IDBZR	LM4040D41IDBZT
Manufacturer	Diodes Incorporated	Diodes Incorporated	Texas Instruments	Texas Instruments
Reference Type	Shunt	Shunt	Shunt	Shunt
Output Type	Fixed	Fixed	Fixed	Fixed
Voltage - Output (Min/Fixed)	4.096V	4.096V	4.096V	4.096V
Current - Output	5 mA	5 mA	15 mA	15 mA
Tolerance	±2%	±2%	±1%	±1%
Temperature Coefficient	90 ppm/°C	90 ppm/°C	150 ppm/°C	150 ppm/°C
Noise - 10Hz to 10kHz	90 µVrms	90 µVrms	80 µVrms	80 µVrms
Current - Cathode	23 µA	23 µA	88 µA	88 µA
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Package / Case	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

ZRC400F02TA is the direct parametric equivalent and recommended first choice for replacement. It maintains all electrical specifications of the original ZRC400F02TC while offering active product status and improved availability. The only difference is packaging format (Tape & Reel), which does not affect circuit performance or PCB layout compatibility.

LM4040D41IDBZR and LM4040D41IDBZT are manufacturer-recommended alternatives from Texas Instruments. Both parts are active products with superior tolerance (±1%) and higher output current (15 mA). The LM4040D41IDBZR is supplied in Cut Tape & Digi-Reel format, while the LM4040D41IDBZT is supplied in Tape & Reel format. These parts are suitable for applications where tighter voltage accuracy or higher current delivery is beneficial. All three substitute parts maintain ROHS3 compliance and identical operating temperature ranges.

Frequently Asked Questions (FAQ)

Q: Can ZRC400F02TA be used as a direct replacement for ZRC400F02TC?

A: Yes. ZRC400F02TA is a parametric equivalent with identical electrical specifications. The only difference is packaging format (Tape & Reel versus individual packaging). No circuit modifications are required.

Q: What are the key differences between the Diodes ZRC400F02TA and Texas Instruments LM4040D41IDBZR/IDBZT?

A: Both maintain the same 4.096V output voltage and SOT-23-3 package. The Texas Instruments parts offer ±1% tolerance versus ±2%, and 15 mA output current versus 5 mA. The LM4040 series has a higher temperature coefficient (150 ppm/°C versus 90 ppm/°C) and higher cathode current (88 µA versus 23 µA).

Q: Are all substitute parts compatible with the original PCB layout?

A: Yes. All substitute parts use the identical SOT-23-3 package and surface mount configuration, ensuring direct PCB compatibility without layout modifications.

Q: What is the difference between LM4040D41IDBZR and LM4040D41IDBZT?

A: Both parts are electrically identical. LM4040D41IDBZR is supplied in Cut Tape & Digi-Reel format, while LM4040D41IDBZT is supplied in Tape & Reel format. Selection depends on procurement and assembly requirements.

Q: Why is the original ZRC400F02TC marked as obsolete?

A: The ZRC400F02TC is classified as obsolete by the manufacturer. The active equivalent ZRC400F02TA and Texas Instruments alternatives ensure continued design support and production availability.

Q: Do all substitute parts meet RoHS compliance requirements?

A: Yes. All substitute parts listed are ROHS3 compliant and REACH unaffected, matching the compliance status of the original ZRC400F02TC.

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