ZR40401R50STZ Equivalent & Substitute Parts

Part Overview

The ZR40401R50STZ is a shunt voltage reference IC manufactured by Diodes Incorporated, designed to provide a fixed 5V output with ±1% tolerance. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement. The part operates across the industrial temperature range of -40°C to 85°C and is suitable for applications requiring precision voltage reference functionality in through-hole configurations.

Key Parameters

Parameter	Value
Manufacturer Part Number	ZR40401R50STZ
Manufacturer	Diodes Incorporated
Category	Power Management (PMIC)
Reference Type	Shunt
Output Voltage	5V (Fixed)
Output Current	15 mA
Tolerance	±1%
Temperature Coefficient	100 ppm/°C
Noise (10Hz to 10kHz)	105 µVrms
Cathode Current	60 µA
Operating Temperature	-40°C to 85°C
Mounting Type	Through Hole
Package	E-Line-3 (TO-92 compatible)
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the ZR40401R50STZ is determined by the following critical parameters:

Output Voltage: 5V fixed output is the primary selection criterion
Output Current: 15 mA minimum capability required
Tolerance: ±1% or better acceptable
Temperature Coefficient: 100 ppm/°C or lower acceptable
Operating Temperature Range: -40°C to 85°C minimum required
Mounting Type: Through Hole required
Package Compatibility: TO-92-3 or E-Line equivalent required
Compliance: ROHS3 compliance required

Substitute parts are grouped into two categories based on output voltage specification: those matching the exact 5V output and those with alternative fixed voltages that do not qualify as direct substitutes.

Parameter Comparison

Parameter	ZR40401R50STZ	LM4040D50ILPR	LM4040D50ILPRE3	LM4040C50ILPR	LM4040DIZ-5.0/LFT1
Manufacturer	Diodes Inc.	Texas Instruments	Texas Instruments	Texas Instruments	National Semiconductor
Output Voltage	5V	5V	5V	5V	5V
Output Current	15 mA	15 mA	15 mA	15 mA	15 mA
Tolerance	±1%	±1%	±1%	±0.5%	±1%
Temperature Coefficient	100 ppm/°C	150 ppm/°C	150 ppm/°C	100 ppm/°C	150 ppm/°C
Noise (10Hz to 10kHz)	105 µVrms	80 µVrms	80 µVrms	80 µVrms	80 µVrms
Cathode Current	60 µA	95 µA	95 µA	95 µA	85 µA
Operating Temperature	-40°C to 85°C	-40°C to 85°C	-40°C to 85°C	-40°C to 85°C	-40°C to 85°C
Package	E-Line-3	TO-92-3	TO-92-3	TO-92-3	TO-92-3
Product Status	Obsolete	Active	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitutes (5V Output, Active Status)

LM4040D50ILPR (Texas Instruments) and LM4040C50ILPR (Texas Instruments) are the preferred substitutes. Both maintain the 5V fixed output specification and are currently in active production status. LM4040D50ILPR matches the ±1% tolerance of the original part, while LM4040C50ILPR offers improved ±0.5% tolerance. Both are ROHS3 compliant and available in TO-92-3 packaging with through-hole mounting.

Secondary Substitute (5V Output, Active Status)

LM4040DIZ-5.0/LFT1 (National Semiconductor) provides 5V output with ±1% tolerance and active product status. This part is ROHS3 compliant and available in TO-92-3 packaging.

Alternative Substitutes (Different Output Voltages)

LM4040BIZ-4.1/NOPB and LM4040CIZ-4.1/NOPB provide 4.096V output and do not qualify as direct substitutes for 5V applications. These parts are listed for reference only and are not recommended for replacement of the ZR40401R50STZ.

Frequently Asked Questions (FAQ)

Q: Can LM4040D50ILPR directly replace ZR40401R50STZ?

A: Yes. Both parts provide 5V fixed output at 15 mA with ±1% tolerance, operate across -40°C to 85°C, and are packaged in TO-92-3 through-hole configuration. The LM4040D50ILPR is currently in active production, addressing the obsolescence of the original part.

Q: What is the difference between LM4040D50ILPR and LM4040C50ILPR?

A: LM4040C50ILPR offers tighter tolerance (±0.5% versus ±1%) and lower temperature coefficient (100 ppm/°C versus 150 ppm/°C). Both maintain 5V output and 15 mA current rating. Selection depends on application precision requirements.

Q: Are the 4.096V variants compatible?

A: No. LM4040BIZ-4.1/NOPB and LM4040CIZ-4.1/NOPB output 4.096V, not 5V. These are not suitable replacements for applications requiring 5V reference voltage.

Q: What packaging considerations apply to these substitutes?

A: All recommended substitutes use TO-92-3 through-hole packaging, which is mechanically compatible with the original E-Line-3 package. Pin configuration and lead spacing are equivalent for direct board-level replacement.

Q: Are all substitutes RoHS compliant?

A: Yes. All recommended substitute parts are ROHS3 compliant, matching the compliance status of the original ZR40401R50STZ.

Q: Which substitute has the lowest noise specification?

A: LM4040D50ILPR, LM4040D50ILPRE3, LM4040C50ILPR, and LM4040DIZ-5.0/LFT1 all specify 80 µVrms noise (10Hz to 10kHz), compared to 105 µVrms for the original part.

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