ZR40402F50TC Equivalent & Substitute Parts

Part Overview

The ZR40402F50TC is a shunt voltage reference IC manufactured by Diodes Incorporated, designed to provide a fixed 5V output with ±2% tolerance. This Surface Mount device in SOT-23-3 packaging delivers 15 mA output current and operates across the industrial temperature range of -40°C to 85°C. The part is classified as Obsolete, making identification of functional equivalents and substitutes essential for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Reference Type	Shunt
Output Type	Fixed
Voltage - Output (Min/Fixed)	5V
Current - Output	15 mA
Tolerance	±2%
Temperature Coefficient	100ppm/°C
Noise - 10Hz to 10kHz	105µVrms
Current - Cathode	60 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 of the ZR40402F50TC is determined by the following critical parameters:

Output Voltage: 5V fixed output is the primary selection criterion
Reference Type: Shunt topology must be maintained
Output Current: 15 mA minimum capability required
Tolerance: ±2% or better acceptable
Package: SOT-23-3 form factor mandatory for mechanical compatibility
Temperature Range: Operating range must cover -40°C to 85°C minimum
Compliance: ROHS3 compliance required

Substitute parts are grouped into two categories:

Parametric Equivalent (Same Manufacturer): ZR40402F50TA from Diodes Incorporated maintains identical electrical specifications with packaging variation (Cut Tape vs. Tube).

Cross-Manufacturer Substitutes: Parts from Analog Devices Inc. and Texas Instruments that meet or exceed the electrical and mechanical requirements while maintaining 5V output and SOT-23-3 packaging.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Voltage Output	Tolerance	Temp Coeff	Noise 10Hz-10kHz	Cathode Current	Temp Range	Product Status	Package
ZR40402F50TC	Diodes Inc.	5V	±2%	100ppm/°C	105µVrms	60 µA	-40~85°C	Obsolete	SOT-23-3
ZR40402F50TA	Diodes Inc.	5V	±2%	100ppm/°C	105µVrms	60 µA	-40~85°C	Last Time Buy	SOT-23-3
ADR5045ARTZ-REEL7	Analog Devices	5V	±0.2%	100ppm/°C	280µVrms	60 µA	-40~125°C	Active	SOT-23-3
ADR5045BRTZ-REEL7	Analog Devices	5V	±0.1%	75ppm/°C	280µVrms	60 µA	-40~125°C	Active	SOT-23-3
LM4040A50IDBZR	Texas Instruments	5V	±0.1%	100ppm/°C	80µVrms	95 µA	-40~85°C	Active	SOT-23-3
LM4040A50IDBZT	Texas Instruments	5V	±0.1%	100ppm/°C	80µVrms	95 µA	-40~85°C	Active	SOT-23-3
LM4040AEM3-5.0+T	Analog Devices/Maxim	5V	±0.1%	100ppm/°C	80µVrms	80 µA	-40~125°C	Active	SOT-23-3
LM4040AIM3-5.0+T	Analog Devices/Maxim	5V	±0.1%	100ppm/°C	80µVrms	80 µA	-40~85°C	Active	SOT-23-3

Engineering Selection Recommendations

Direct Replacement (Diodes Incorporated): ZR40402F50TA is the parametric equivalent from the same manufacturer. This part maintains identical electrical specifications and is available in higher inventory (5843 pcs vs. 1030 pcs for the original). Status is Last Time Buy, indicating limited future availability.

Active Production Alternatives: All Analog Devices and Texas Instruments substitutes listed are in Active product status, ensuring long-term availability and supply chain stability. These parts exceed the original specifications in tolerance (±0.1% vs. ±2%) and extended temperature range (-40°C to 125°C vs. -40°C to 85°C).

Compliance Considerations: All substitute parts maintain ROHS3 compliance and identical MSL rating (1 - Unlimited), ensuring compatibility with existing manufacturing and environmental requirements.

Inventory Availability: Texas Instruments LM4040A50IDBZR offers the highest inventory level (999,200 pcs), providing supply security for high-volume applications. Analog Devices ADR5045ARTZ-REEL7 provides 36,120 pcs with Active status.

Frequently Asked Questions (FAQ)

Q: Can ZR40402F50TA directly replace ZR40402F50TC?

A: Yes. Both parts are from Diodes Incorporated with identical electrical specifications (5V, ±2%, 15 mA, SOT-23-3). The difference is packaging format (Cut Tape vs. Tube). Verify your assembly equipment compatibility with the packaging type.

Q: What is the key difference between the Diodes part and Analog Devices substitutes?

A: The primary difference is tolerance and temperature range. Analog Devices ADR5045 series offers ±0.1% to ±0.2% tolerance versus ±2%, and extends operating temperature to 125°C. All maintain 5V output and SOT-23-3 packaging. Electrical performance is superior in the Analog Devices parts.

Q: Are Texas Instruments LM4040A50IDBZR and LM4040A50IDBZT interchangeable?

A: Yes. Both are Texas Instruments LM4040A50 variants with identical electrical specifications. The difference is in packaging format (IDBZR vs. IDBZT). Verify your reel specifications with your supplier.

Q: Can I use a 4.096V reference instead of 5V?

A: No. The ADR5044 series (4.096V output) does not meet the 5V output requirement specified for ZR40402F50TC. Output voltage is a critical parameter and cannot be substituted.

Q: What is the impact of higher cathode current in Texas Instruments parts?

A: Texas Instruments LM4040A50 series draws 95 µA cathode current versus 60 µA in the original. This increases power consumption but remains within typical circuit design margins. Verify your bias network design accommodates this difference.

Q: Is automotive qualification required for my application?

A: Automotive-qualified parts (LM4040AEM3-5.0+T with AEC-Q100) are available if your application requires automotive-grade components. Standard industrial parts are suitable for non-automotive applications.

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