ZRB500F02TC Equivalent & Substitute Parts

Part Overview

The ZRB500F02TC is a shunt voltage reference IC manufactured by Diodes Incorporated, designed to provide a fixed 5V 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 new designs and production continuity. The part delivers 15 mA output current and operates across the industrial temperature range of -40°C to 85°C, suitable for precision voltage reference applications in power management circuits.

Key Parameters

Parameter	Value
Reference Type	Shunt
Output Type	Fixed
Voltage - Output (Min/Fixed)	5V
Current - Output	15 mA
Tolerance	±2%
Temperature Coefficient	50 ppm/°C
Noise - 10Hz to 10kHz	105 µVrms
Current - Cathode	50 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 ZRB500F02TC is determined by the following critical parameters:

Output Voltage: Must be 5V fixed output
Reference Type: Shunt topology
Package: SOT-23-3 surface mount only
Current Output: 15 mA nominal
Operating Temperature Range: Minimum -40°C to 85°C
Compliance: ROHS3 compliant, MSL 1

Substitute parts are grouped into two categories:

Category 1 - Direct Parametric Equivalent: ZRB500F02TA (Diodes Incorporated) matches all electrical specifications and differs only in product status (Active vs. Obsolete) and packaging format.

Category 2 - Functional Equivalents with Enhanced Specifications: Analog Devices ADR5045 series and Texas Instruments LM4040 series provide 5V fixed output in SOT-23-3 packages with improved tolerance (±0.1% to ±0.2%), lower temperature coefficients, and extended temperature ranges. These parts are direct functional replacements with superior performance characteristics.

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Tolerance	Temp Coeff (ppm/°C)	Noise 10Hz-10kHz (µVrms)	Cathode Current (µA)	Temp Range (°C)	Product Status
ZRB500F02TC	Diodes Inc.	5V	±2%	50	105	50	-40 to 85	Obsolete
ZRB500F02TA	Diodes Inc.	5V	±2%	50	105	50	-40 to 85	Active
ADR5045ARTZ-REEL7	Analog Devices	5V	±0.2%	100	280	60	-40 to 125	Active
ADR5045BRTZ-REEL7	Analog Devices	5V	±0.1%	75	280	60	-40 to 125	Active
LM4040A50IDBZR	Texas Instruments	5V	±0.1%	100	80	95	-40 to 85	Active
LM4040A50IDBZT	Texas Instruments	5V	±0.1%	100	80	95	-40 to 85	Active
LM4040AEM3-5.0+T	Analog Devices/Maxim	5V	±0.1%	100	80	80	-40 to 125	Active
LM4040AIM3-5.0+T	Analog Devices/Maxim	5V	±0.1%	100	80	80	-40 to 85	Active

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications)

Use ZRB500F02TA when exact electrical and thermal performance matching is required. This part maintains the ±2% tolerance and 50 ppm/°C temperature coefficient of the original ZRB500F02TC while offering active product status and improved availability.

For Enhanced Performance Applications

The ADR5045BRTZ-REEL7 and LM4040A50IDBZR series provide superior tolerance (±0.1%) and lower noise characteristics while maintaining the 5V output and SOT-23-3 package. These parts are suitable for applications requiring tighter voltage regulation and lower output impedance. The extended temperature range (-40°C to 125°C) of the ADR5045 series accommodates automotive and industrial environments beyond the original specification.

For Automotive and High-Reliability Applications

LM4040AEM3-5.0+T carries AEC-Q100 qualification and automotive-grade certification, making it appropriate for automotive power management circuits. The extended operating temperature range and active product status ensure long-term supply continuity.

All substitute parts maintain ROHS3 compliance, MSL 1 rating, and SOT-23-3 packaging, ensuring direct PCB compatibility without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can ZRB500F02TA be used as a direct drop-in replacement for ZRB500F02TC?

A: Yes. ZRB500F02TA is a parametric equivalent with identical electrical specifications (5V output, ±2% tolerance, 50 ppm/°C temperature coefficient, 15 mA output current). The only differences are product status (Active vs. Obsolete) and packaging format. No circuit modifications are required.

Q: What are the key differences between the ZRB500F02TC and the ADR5045 series?

A: The ADR5045 series offers improved tolerance (±0.2% to ±0.1% vs. ±2%), extended operating temperature range (-40°C to 125°C vs. -40°C to 85°C), and higher cathode current (60 µA vs. 50 µA). All parts maintain 5V output and SOT-23-3 packaging. The ADR5045 series is suitable for applications requiring tighter voltage regulation.

Q: Are the Texas Instruments LM4040 parts compatible with the ZRB500F02TC footprint?

A: Yes. All LM4040A50 variants use the SOT-23-3 package, providing identical PCB footprint compatibility. The LM4040A50IDBZR and LM4040A50IDBZT differ only in tape reel configuration and are electrically identical.

Q: Which substitute part has the lowest output noise?

A: The LM4040A50IDBZR and LM4040A50IDBZT deliver 80 µVrms noise (10Hz to 10kHz), compared to 105 µVrms for the ZRB500F02TC and 280 µVrms for the ADR5045 series. These Texas Instruments parts are optimal for low-noise precision applications.

Q: Can I use a substitute part with a different temperature range?

A: Yes, provided the substitute's operating temperature range encompasses your application requirements. The ADR5045 series (-40°C to 125°C) and LM4040AEM3-5.0+T (-40°C to 125°C) extend beyond the original -40°C to 85°C range, offering broader environmental compatibility.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance and MSL 1 rating, matching the original ZRB500F02TC environmental and regulatory requirements.

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