ZXRE125DRSTZ Equivalent & Substitute Parts

Part Overview

The ZXRE125DRSTZ is a shunt voltage reference IC manufactured by Diodes Incorporated, designed to provide a fixed 1.22V output with ±1% tolerance. This component is classified as a Power Management (PMIC) device and is packaged in an E-Line (TO-92 compatible) through-hole configuration. The part is currently obsolete, making identification of suitable substitutes essential for ongoing system support and new design implementations where this reference voltage is required.

Substiute Parts

ZXRE125DRSTZ

Diodes IncorporatedIn Stock: 900ZXRE125DRSTZ Datasheet

Current PartRFQ

ZXRE125DFTA

Diodes IncorporatedIn Stock: 9109ZXRE125DFTA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ZXRE125DRSTZ is determined by the following critical electrical and mechanical parameters:

Electrical Equivalence Criteria:

• Fixed output voltage of 1.22V
• Output current capability of 20 mA
• Tolerance of ±1%
• Temperature coefficient of 75 ppm/°C
• Noise specification of 60 µVrms (10Hz to 10kHz)
• Cathode current of 8 µA
• Operating temperature range of -40°C to 85°C

Mechanical Compatibility Criteria:

• Reference type: Shunt configuration
• Base product number: ZXRE125 (same device family)
• RoHS3 compliance
• Moisture sensitivity level: 1 (Unlimited)

The ZXRE125DFTA qualifies as a direct substitute based on identical electrical specifications. The primary difference is the package format: the substitute transitions from through-hole E-Line packaging to surface-mount SOT-23-3 packaging, requiring PCB layout modification but maintaining full electrical compatibility.

Parameter Comparison

Engineering Selection Recommendations

The ZXRE125DFTA is the manufacturer-recommended substitute for the obsolete ZXRE125DRSTZ. Both components share identical electrical specifications and are manufactured by Diodes Incorporated from the same ZXRE125 base product family.

Product Status Consideration: The ZXRE125DRSTZ is obsolete, while the ZXRE125DFTA maintains active production status, ensuring long-term availability and supply chain continuity.

Compliance Alignment: Both parts maintain ROHS3 compliance and identical moisture sensitivity ratings, satisfying regulatory and environmental requirements without modification.

Implementation Path: Selection between these parts depends on PCB architecture. The through-hole E-Line package of the main part suits legacy designs and breadboard prototyping, while the surface-mount SOT-23-3 package of the substitute aligns with modern manufacturing processes and compact PCB layouts. Electrical performance is identical across both package options.

Frequently Asked Questions (FAQ)

Q: Can ZXRE125DFTA directly replace ZXRE125DRSTZ in existing designs?

A: Electrical substitution is complete. The ZXRE125DFTA provides identical voltage output, current capability, tolerance, temperature coefficient, and noise characteristics. PCB layout modification is required due to package format change from through-hole to surface-mount.

Q: What is the primary difference between these two parts?

A: The ZXRE125DRSTZ uses E-Line (TO-92 compatible) through-hole packaging, while the ZXRE125DFTA uses SOT-23-3 surface-mount packaging. All electrical parameters remain identical.

Q: Are both parts RoHS compliant?

A: Yes, both ZXRE125DRSTZ and ZXRE125DFTA are ROHS3 compliant with identical moisture sensitivity levels.

Q: Why is the ZXRE125DRSTZ marked as obsolete?

A: The through-hole E-Line package format has been superseded by surface-mount alternatives in modern manufacturing. The ZXRE125DFTA in SOT-23-3 packaging represents the active production equivalent.

Q: Can I use a through-hole adapter for the surface-mount substitute?

A: Mechanical adaptation is possible through third-party through-hole to surface-mount adapters, though this approach introduces additional cost and assembly complexity. Direct PCB redesign for surface-mount implementation is the standard engineering approach.

Q: What inventory status should I expect?

A: The ZXRE125DRSTZ is obsolete with limited remaining stock. The ZXRE125DFTA maintains active production with established supply availability.