ZHT431F01TC Equivalent & Substitute Parts

Part Overview

The ZHT431F01TC is a shunt voltage reference IC manufactured by Diodes Incorporated, classified as a Power Management (PMIC) component. This adjustable reference provides a 2.5V to 20V output with ±1% tolerance in a SOT-23-3 surface mount package. The part is currently obsolete, with 778 pieces available in new original stock. Due to its obsolete status, identifying equivalent and substitute parts is essential for design continuity and procurement planning.

Substiute Parts

ZHT431F01TC

Diodes IncorporatedIn Stock: 837ZHT431F01TC Datasheet

Current PartRFQ

ZHT431F01TA

Diodes IncorporatedIn Stock: 16937ZHT431F01TA Datasheet

Parametric EquivalentRFQ

SPX2431M-L/TR

MaxLinear, Inc.In Stock: 30117SPX2431M-L/TR Datasheet

MFR RecommendedRFQ

TL432BCDBZR

Texas InstrumentsIn Stock: 20332TL432BCDBZR Datasheet

MFR RecommendedRFQ

TL432BCDBZT

Texas InstrumentsIn Stock: 4891TL432BCDBZT Datasheet

MFR RecommendedRFQ

TL432BIDBZR

Texas InstrumentsIn Stock: 50424TL432BIDBZR Datasheet

MFR RecommendedRFQ

TL432BIDBZT

Texas InstrumentsIn Stock: 4862TL432BIDBZT Datasheet

MFR RecommendedRFQ

TL432BQDBZR

Texas InstrumentsIn Stock: 56384TL432BQDBZR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the ZHT431F01TC is determined by the following critical parameters:

Core Electrical Parameters:

• Reference Type: Shunt
• Output Type: Adjustable
• Voltage Output Range: Minimum 2.5V, Maximum at least 20V
• Current Output: 100 mA
• Tolerance: ±1% or better
• Operating Temperature Range: Must support -55°C to 125°C or equivalent extended range

Physical Parameters:

• Package: SOT-23-3 (TO-236-3, SC-59)
• Mounting Type: Surface Mount

Compliance Parameters:

• RoHS3 Compliant
• MSL: 1 (Unlimited)

Substitute parts are grouped into two categories:

Category 1 - Parametric Equivalent (Direct Replacement): Parts with identical electrical specifications and the same manufacturer (Diodes Incorporated). These parts maintain the same voltage range, tolerance, and temperature coefficient.

Category 2 - Manufacturer Recommended Alternatives: Parts from other manufacturers (MaxLinear, Texas Instruments) that meet or exceed the core electrical requirements. These may have improved specifications (lower temperature coefficient, higher maximum voltage, extended temperature range) but maintain compatibility with the SOT-23-3 package and core functional parameters.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications):

ZHT431F01TA is the primary equivalent part. It is manufactured by Diodes Incorporated and maintains identical electrical specifications to the ZHT431F01TC, including voltage range (2.5V to 20V), tolerance (±1%), temperature coefficient (67 ppm/°C), and operating temperature range (-55°C to 125°C). The part is currently active with 16,880 pieces in stock. Both parts are ROHS3 compliant with MSL 1 (Unlimited). This part is suitable for direct substitution in all applications where the ZHT431F01TC was originally specified.

For Enhanced Performance Alternatives:

The Texas Instruments TL432BQDBZR offers the widest operating temperature range (-40°C to 125°C) matching the original part's lower temperature limit, combined with improved tolerance (±0.5% versus ±1%) and extended maximum output voltage (36V versus 20V). This part is suitable for applications requiring extended temperature operation and higher voltage headroom. It is ROHS3 compliant with 56,300 pieces in stock.

The MaxLinear SPX2431M-L/TR provides improved temperature coefficient performance (30 ppm/°C versus 67 ppm/°C), beneficial for applications requiring superior temperature stability. However, its operating temperature range (0°C to 105°C) is narrower than the original part and may not be suitable for applications requiring -55°C operation.

For Cost-Optimized Selection:

TL432BIDBZR and TL432BIDBZT offer extended temperature range (-40°C to 85°C) with improved tolerance (±0.5%) and are available in high quantities (50,400 and 4,800 pieces respectively). These parts are suitable for applications where the full -55°C lower temperature limit is not required.

Compliance Considerations:

All substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) ratings, ensuring compatibility with modern manufacturing and storage requirements.

Frequently Asked Questions (FAQ)

Q: Can ZHT431F01TA be used as a direct replacement for ZHT431F01TC?

A: Yes. ZHT431F01TA is a parametric equivalent manufactured by Diodes Incorporated with identical electrical specifications, including voltage range (2.5V to 20V), tolerance (±1%), temperature coefficient (67 ppm/°C), and operating temperature range (-55°C to 125°C). The only difference is product status: ZHT431F01TC is obsolete while ZHT431F01TA is active. Both use the SOT-23-3 package.

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

A: Diodes Incorporated parts (ZHT431F01TA) maintain identical specifications to the original. Texas Instruments parts (TL432 series) offer improved tolerance (±0.5% versus ±1%) and higher maximum output voltage (36V versus 20V), but have different cathode current specifications and may have narrower operating temperature ranges depending on the specific variant selected.

Q: Which substitute part should I use if my application requires operation at -55°C?

A: ZHT431F01TA maintains the original -55°C lower operating temperature limit. Among Texas Instruments alternatives, TL432BQDBZR supports -40°C to 125°C, which does not reach -55°C. If -55°C operation is required, ZHT431F01TA is the appropriate choice.

Q: Are all substitute parts available in SOT-23-3 packaging?

A: Yes. All listed substitute parts use the SOT-23-3 package (also designated TO-236-3 or SC-59), ensuring physical and electrical compatibility with the original ZHT431F01TC footprint.

Q: What is the difference between TL432BCDBZR and TL432BQDBZR?

A: Both are Texas Instruments TL432 shunt voltage references with identical electrical specifications (±0.5% tolerance, 2.495V to 36V output, 100 mA). The primary difference is operating temperature range: TL432BCDBZR operates from 0°C to 70°C, while TL432BQDBZR operates from -40°C to 125°C. TL432BQDBZR is suitable for extended temperature applications.

Q: Do all substitute parts meet RoHS compliance?

A: Yes. All listed substitute parts are RoHS compliant (ROHS3 or RoHS Compliant status). All maintain MSL 1 (Unlimited) moisture sensitivity rating.

Q: Can I use a substitute part with higher maximum voltage (36V) in a circuit designed for 20V maximum?

A: Yes. A substitute part with higher maximum voltage rating (36V) is compatible with circuits designed for lower maximum voltage (20V). The higher rating provides additional design margin and flexibility. The adjustable output range and tolerance specifications remain the primary functional parameters for circuit compatibility.

Q: What is the significance of the temperature coefficient difference between parts?

A: Temperature coefficient (ppm/°C) indicates how much the reference voltage changes with temperature. Lower values indicate better temperature stability. The original ZHT431F01TC has 67 ppm/°C, while SPX2431M-L/TR has 30 ppm/°C. For applications requiring high temperature stability, the lower temperature coefficient is advantageous, but this parameter is not provided for Texas Instruments TL432 variants in the available data.