ZRC250F02TC Equivalent & Substitute Parts

Part Overview

The ZRC250F02TC is a shunt voltage reference IC manufactured by Diodes Incorporated, providing a fixed 2.5V output with ±2% tolerance in a 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 -40°C to 85°C temperature range.

Key Parameters

Parameter	Value
Reference Type	Shunt
Output Type	Fixed
Voltage - Output (Min/Fixed)	2.5V
Current - Output	5 mA
Tolerance	±2%
Temperature Coefficient	90 ppm/°C
Noise - 10Hz to 10kHz	60 µVrms
Current - Cathode	20 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
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the ZRC250F02TC is determined by the following critical parameters: fixed 2.5V output voltage, SOT-23-3 package compatibility, shunt reference topology, and surface mount configuration. All substitute parts maintain these core electrical and mechanical specifications.

Substitute parts are grouped into two categories:

Parametric Equivalent: ZRC250F02TA maintains identical electrical specifications and differs only in product status (Active vs. Obsolete) and packaging format (Tape & Reel vs. unspecified).

Manufacturer Recommended Alternatives: Parts from Texas Instruments (LM4040 and LM4431 series), Analog Devices/Maxim Integrated (MAX6008 series), and STMicroelectronics (TS4040 and TS822 series) provide 2.5V fixed output in SOT-23-3 packages with variations in output current, temperature coefficient, and operating temperature ranges.

Parameter Comparison

Part Number	Manufacturer	Voltage Output	Current Output	Tolerance	Temp Coeff	Cathode Current	Operating Temp	Package	Product Status
ZRC250F02TC	Diodes Incorporated	2.5V	5 mA	±2%	90 ppm/°C	20 µA	-40°C ~ 85°C	SOT-23-3	Obsolete
ZRC250F02TA	Diodes Incorporated	2.5V	5 mA	±2%	90 ppm/°C	20 µA	-40°C ~ 85°C	SOT-23-3	Active
LM4040EEM3-2.5/NOPB	Texas Instruments	2.5V	15 mA	±2%	150 ppm/°C	73 µA	-40°C ~ 125°C	SOT-23-3	Active
LM4040EIM3-2.5/NOPB	Texas Instruments	2.5V	15 mA	±2%	150 ppm/°C	70 µA	-40°C ~ 85°C	SOT-23-3	Active
LM4040EIM3X-2.5/NOPB	Texas Instruments	2.5V	15 mA	±2%	150 ppm/°C	70 µA	-40°C ~ 85°C	SOT-23-3	Active
LM4431M3-2.5/NOPB	Texas Instruments	2.5V	15 mA	±2%	30 ppm/°C Typical	100 µA	0°C ~ 70°C	SOT-23-3	Active
LM4431M3X-2.5/NOPB	Texas Instruments	2.5V	15 mA	±2%	30 ppm/°C Typical	100 µA	0°C ~ 70°C	SOT-23-3	Active
MAX6008AEUR+T	Analog Devices Inc./Maxim Integrated	2.5V	2 mA	±0.2%	30 ppm/°C	1 µA	-40°C ~ 85°C	SOT-23-3	Active
MAX6008BEUR+T	Analog Devices Inc./Maxim Integrated	2.5V	2 mA	±0.5%	75 ppm/°C	1 µA	-40°C ~ 85°C	SOT-23-3	Active
TS4040EILT-2.5	STMicroelectronics	2.5V	15 mA	±2%	150 ppm/°C	70 µA	-40°C ~ 85°C	SOT-23-3	Active
TS822ILT	STMicroelectronics	2.5V	15 mA	±2%	100 ppm/°C	60 µA	-40°C ~ 85°C	SOT-23-3	Active

Engineering Selection Recommendations

Direct Replacement: ZRC250F02TA is the primary equivalent, offering identical electrical performance with active product status and improved availability. This part is ROHS3 compliant and maintains the same operating temperature range and output specifications as the ZRC250F02TC.

Higher Output Current Applications: LM4040EIM3-2.5/NOPB, LM4040EIM3X-2.5/NOPB, TS4040EILT-2.5, and TS822ILT deliver 15 mA output current compared to the original 5 mA specification. These parts maintain ±2% tolerance and -40°C to 85°C operating range, with variations in temperature coefficient and cathode current. All are ROHS3 compliant and actively produced.

Lower Noise and Higher Precision: MAX6008AEUR+T and MAX6008BEUR+T provide superior tolerance specifications (±0.2% and ±0.5% respectively) with reduced cathode current (1 µA). These parts operate at lower output current (2 mA) and are suitable for precision reference applications. Both maintain -40°C to 85°C operating range and ROHS3 compliance.

Extended Temperature Range: LM4040EEM3-2.5/NOPB extends the upper operating temperature to 125°C while maintaining ±2% tolerance and 15 mA output current, suitable for high-temperature environments.

Restricted Temperature Range: LM4431M3-2.5/NOPB and LM4431M3X-2.5/NOPB operate within 0°C to 70°C with superior temperature coefficient (30 ppm/°C typical) and are appropriate for controlled-environment applications requiring minimal temperature drift.

All substitute parts are ROHS3 compliant, MSL Level 1, and REACH unaffected, meeting the same regulatory requirements as the original component.

Frequently Asked Questions (FAQ)

Q: Can ZRC250F02TA directly replace ZRC250F02TC without circuit modification?

A: Yes. ZRC250F02TA is a parametric equivalent with identical electrical specifications: 2.5V fixed output, ±2% tolerance, 5 mA output current, 90 ppm/°C temperature coefficient, and -40°C to 85°C operating range. Both use SOT-23-3 packaging. The primary difference is product status (Active vs. Obsolete) and packaging format.

Q: What are the key differences between the original ZRC250F02TC and the LM4040/TS4040 series alternatives?

A: The LM4040 and TS4040 series provide higher output current (15 mA vs. 5 mA) while maintaining 2.5V output and ±2% tolerance. Temperature coefficient varies: LM4040 series at 150 ppm/°C, TS4040EILT-2.5 at 150 ppm/°C, and TS822ILT at 100 ppm/°C. All operate within -40°C to 85°C range and use SOT-23-3 packages. Higher output current may require circuit evaluation for load compatibility.

Q: When should MAX6008 series parts be selected over other alternatives?

A: MAX6008AEUR+T and MAX6008BEUR+T are appropriate when precision and low noise are critical. These parts offer superior tolerance (±0.2% and ±0.5% respectively) and minimal cathode current (1 µA). However, output current is limited to 2 mA, requiring circuit design confirmation for load requirements.

Q: Are all substitute parts compatible with the original SOT-23-3 footprint?

A: Yes. All listed substitute parts use TO-236-3, SC-59, SOT-23-3 packaging, ensuring mechanical and electrical compatibility with existing PCB layouts designed for the ZRC250F02TC.

Q: What is the significance of temperature coefficient differences among substitutes?

A: Temperature coefficient indicates voltage drift across the operating temperature range. Lower values (30 ppm/°C for LM4431 and MAX6008 series) provide better stability across temperature extremes. Higher values (150 ppm/°C for LM4040EEM3 and TS4040EILT-2.5) are acceptable for applications with moderate temperature sensitivity requirements.

Q: Do all substitute parts meet the same compliance standards as the original?

A: Yes. All listed substitute parts are ROHS3 compliant, MSL Level 1 (Unlimited), and REACH unaffected, matching the regulatory compliance of the ZRC250F02TC.

Q: What packaging format differences exist among the substitute parts?

A: Substitute parts are available in Tape & Reel (TR) and Cut Tape (CT) & Digi-Reel® formats. These are packaging and delivery options that do not affect electrical performance or PCB compatibility. Selection depends on procurement and assembly requirements.

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