ZXRE4041DRSTOA Equivalent & Substitute Parts

Part Overview

The ZXRE4041DRSTOA is a shunt voltage reference IC manufactured by Diodes Incorporated, designed to provide a fixed 1.225V output with ±1% tolerance. This component is classified as obsolete, with 810 units currently in stock. The part operates across a temperature range of -40°C to 125°C and delivers 12 mA output current, making it suitable for precision voltage reference applications in power management circuits.

Due to its obsolete status, identifying functionally equivalent substitute parts is essential for design continuity and long-term supply chain reliability. Active alternatives with comparable electrical characteristics are available from both Diodes Incorporated and Texas Instruments.

Substiute Parts

ZXRE4041DRSTOA

Diodes IncorporatedIn Stock: 896ZXRE4041DRSTOA Datasheet

Current PartRFQ

ZXRE4041DFTA

Diodes IncorporatedIn Stock: 28229ZXRE4041DFTA Datasheet

MFR RecommendedRFQ

LM4041C12ILPR

Texas InstrumentsIn Stock: 3582LM4041C12ILPR Datasheet

MFR RecommendedRFQ

LM4041D12ILPR

Texas InstrumentsIn Stock: 3173LM4041D12ILPR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ZXRE4041DRSTOA is determined by the following core electrical and mechanical parameters:

Primary Matching Criteria:

• Fixed output voltage of 1.225V
• Output current of 12 mA
• Shunt reference type
• Operating temperature range compatibility
• RoHS3 compliance

Secondary Considerations:

• Tolerance specification (±1% or better)
• Temperature coefficient performance
• Noise characteristics
• Cathode current specifications
• Mounting technology (through-hole vs. surface-mount)

The substitute parts are grouped into two categories: a direct form-factor replacement (ZXRE4041DFTA) and functionally equivalent alternatives with different package types (LM4041C12ILPR and LM4041D12ILPR).

Parameter Comparison

Engineering Selection Recommendations

ZXRE4041DFTA (Diodes Incorporated): This part is the manufacturer-recommended direct substitute from Diodes Incorporated. It maintains identical electrical specifications (1.225V, ±1%, 12 mA, 100ppm/°C) and operating temperature range (-40°C to 125°C). The primary difference is the package format: SOT-23-3 surface-mount versus the through-hole E-Line-3 of the original. This part is active and ROHS3 compliant. Selection of this part requires PCB redesign to accommodate surface-mount technology.

LM4041C12ILPR (Texas Instruments): This alternative offers superior tolerance (±0.5% versus ±1%) and lower noise performance (20µVrms versus 60µVrms). It maintains through-hole mounting in TO-92-3 package, compatible with existing PCB layouts. The operating temperature range is limited to -40°C to 85°C, which may be restrictive for applications requiring the full -40°C to 125°C range. Cathode current is higher at 80 µA. This part is active and ROHS3 compliant.

LM4041D12ILPR (Texas Instruments): This part matches the original tolerance specification (±1%) and maintains through-hole TO-92-3 packaging. It offers improved noise performance (20µVrms) compared to the original. Temperature coefficient is slightly higher at 150ppm/°C. Operating temperature range is -40°C to 85°C. Cathode current is 80 µA. This part is active and ROHS3 compliant.

All substitute parts carry ROHS3 compliance and REACH unaffected status, meeting regulatory requirements equivalent to the original component.

Frequently Asked Questions (FAQ)

Q: Can ZXRE4041DFTA be used as a direct replacement for ZXRE4041DRSTOA?

A: ZXRE4041DFTA is electrically equivalent and maintains the same output voltage, current, tolerance, and temperature coefficient. However, it uses SOT-23-3 surface-mount packaging instead of through-hole E-Line-3. Direct PCB substitution without layout modification is not possible. The part is active and in stock (28,213 units), making it suitable for new designs or redesigned boards.

Q: What are the key differences between the Diodes and Texas Instruments options?

A: ZXRE4041DFTA (Diodes) maintains identical electrical specifications to the original but changes to surface-mount packaging. LM4041C12ILPR and LM4041D12ILPR (Texas Instruments) both retain through-hole TO-92-3 packaging. LM4041C12ILPR offers tighter tolerance (±0.5%) and lower noise. LM4041D12ILPR matches the original ±1% tolerance. Both Texas Instruments parts have a reduced operating temperature range (-40°C to 85°C versus -40°C to 125°C).

Q: Which substitute is best for applications requiring the full -40°C to 125°C temperature range?

A: ZXRE4041DFTA is the only substitute maintaining the full -40°C to 125°C operating range. The Texas Instruments alternatives (LM4041C12ILPR and LM4041D12ILPR) are limited to -40°C to 85°C. If the application requires operation above 85°C, ZXRE4041DFTA is the appropriate choice, contingent on PCB redesign for SOT-23-3 surface-mount technology.

Q: Are there package compatibility considerations?

A: Yes. ZXRE4041DRSTOA uses through-hole E-Line-3 (TO-92 compatible) packaging. ZXRE4041DFTA uses surface-mount SOT-23-3, requiring PCB layout changes. LM4041C12ILPR and LM4041D12ILPR use through-hole TO-92-3 packaging, which is mechanically compatible with existing through-hole designs, though pin-to-pin verification is required.

Q: How do noise specifications compare?

A: The original ZXRE4041DRSTOA specifies 60µVrms noise (10Hz to 10kHz). ZXRE4041DFTA maintains this specification. Both Texas Instruments parts (LM4041C12ILPR and LM4041D12ILPR) offer superior noise performance at 20µVrms, a 67% reduction. Applications sensitive to noise may benefit from the Texas Instruments alternatives.

Q: What is the impact of different cathode current specifications?

A: ZXRE4041DRSTOA and ZXRE4041DFTA specify 30 µA cathode current. LM4041C12ILPR and LM4041D12ILPR specify 80 µA. Higher cathode current may affect circuit biasing and power dissipation. Circuit analysis is required to confirm compatibility when switching between these specifications.