Request Quote
(Ships tomorrow)
ZRC250A03STZ Equivalent & Substitute Parts
Part Overview
The ZRC250A03STZ is a shunt voltage reference IC manufactured by Diodes Incorporated, providing a fixed 2.5V output with ±3% tolerance. This device is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement. The TO-92 through-hole package and fixed 2.5V output specification define the functional requirements for direct substitution in legacy and new applications requiring precision voltage reference functionality.
Substiute Parts
Key Parameters
| Parameter | ZRC250A03STZ |
|---|---|
| Reference Type | Shunt |
| Output Type | Fixed |
| Voltage - Output (Min/Fixed) | 2.5V |
| Current - Output | 5 mA |
| Tolerance | ±3% |
| Temperature Coefficient | 90ppm/°C |
| Noise - 10Hz to 10kHz | 60µVrms |
| Current - Cathode | 20 µA |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Mounting Type | Through Hole |
| Package / Case | TO-226-3, TO-92-3 (TO-226AA) Formed Leads |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitution for the ZRC250A03STZ is determined by the following critical parameters:
- Output Voltage: Must be fixed at 2.5V
- Reference Type: Must be shunt topology
- Package: Must be TO-92-3 through-hole configuration
- Tolerance: ±3% or better (±1.5% acceptable)
- Operating Temperature Range: Must support -40°C ~ 85°C minimum
- Output Current: Minimum 5 mA (higher ratings acceptable)
- Compliance: ROHS3 and REACH compliance required
Substitute parts are grouped into two categories based on tolerance specification:
Category A - ±3% Tolerance (Direct Functional Match): LM385LPR-2-5, LM385Z-2.5/LFT1, LM385Z-2.5/LFT2
Category B - ±1.5% Tolerance (Enhanced Precision): LM285LPR-2-5, LM285LPRE3-2-5, LM285Z-2.5#TRPBF, LM285Z-2.5/LFT7, LM285Z-2.5RAG, LM385BLPR-2-5, LM385BZ-2.5/LFT7
All substitute parts maintain identical 2.5V output, TO-92-3 package configuration, and shunt reference topology. Differences in temperature coefficient and noise characteristics do not affect functional substitution eligibility.
Parameter Comparison
| Part Number | Manufacturer | Output Voltage | Tolerance | Current - Output | Temperature Coefficient | Noise (10Hz-10kHz) | Operating Temp | Package | Product Status |
|---|---|---|---|---|---|---|---|---|---|
| ZRC250A03STZ | Diodes Incorporated | 2.5V | ±3% | 5 mA | 90ppm/°C | 60µVrms | -40°C ~ 85°C | TO-92-3 | Obsolete |
| LM285LPR-2-5 | Texas Instruments | 2.5V | ±1.5% | 20 mA | 20ppm/°C | 120µVrms | -40°C ~ 85°C | TO-92-3 | Active |
| LM285LPRE3-2-5 | Texas Instruments | 2.5V | ±1.5% | 20 mA | 20ppm/°C | 120µVrms | -40°C ~ 85°C | TO-92-3 | Active |
| LM285Z-2.5#TRPBF | Analog Devices Inc. | 2.5V | ±1.5% | 20 mA | 20ppm/°C | 120µVrms | -40°C ~ 85°C | TO-92-3 | Active |
| LM285Z-2.5/LFT7 | National Semiconductor | 2.5V | ±1.5% | 20 mA | 150ppm/°C | 120µVrms | -40°C ~ 85°C | TO-92-3 | Active |
| LM285Z-2.5RAG | onsemi | 2.5V | ±1.5% | 20 mA | 80ppm/°C | 120µVrms | -40°C ~ 85°C | TO-92-3 | Active |
| LM385BLPR-2-5 | Texas Instruments | 2.5V | ±1.5% | 20 mA | 20ppm/°C | 120µVrms | 0°C ~ 70°C | TO-92-3 | Active |
| LM385BZ-2.5/LFT7 | Texas Instruments | 2.5V | ±1.5% | 20 mA | 150ppm/°C | 120µVrms | 0°C ~ 70°C | TO-92-3 | Active |
| LM385LPR-2-5 | Texas Instruments | 2.5V | ±3% | 20 mA | 20ppm/°C | 120µVrms | 0°C ~ 70°C | TO-92-3 | Active |
| LM385Z-2.5/LFT1 | National Semiconductor | 2.5V | ±3% | 20 mA | 150ppm/°C | 120µVrms | 0°C ~ 70°C | TO-92-3 | Active |
| LM385Z-2.5/LFT2 | Texas Instruments | 2.5V | ±3% | 20 mA | 150ppm/°C | 120µVrms | 0°C ~ 70°C | TO-92-3 | Active |
Engineering Selection Recommendations
Primary Substitutes (Full Temperature Range -40°C ~ 85°C)
For applications requiring the full operating temperature range of the original ZRC250A03STZ, select from:
- LM285LPR-2-5 or LM285LPRE3-2-5 (Texas Instruments): Active status, ±1.5% tolerance, enhanced precision, ROHS3 compliant, highest inventory availability
- LM285Z-2.5#TRPBF (Analog Devices Inc.): Active status, ±1.5% tolerance, ROHS3 compliant, MSL Level 1
- LM285Z-2.5/LFT7 (National Semiconductor): Active status, ±1.5% tolerance, full temperature range support
- LM285Z-2.5RAG (onsemi): Active status, ±1.5% tolerance, ROHS3 compliant
Secondary Substitutes (Restricted Temperature Range 0°C ~ 70°C)
For applications with reduced temperature requirements:
- LM385BLPR-2-5 or LM385BZ-2.5/LFT7 (Texas Instruments): Active status, ±1.5% tolerance, ROHS3 compliant
- LM385LPR-2-5, LM385Z-2.5/LFT1, or LM385Z-2.5/LFT2 (Texas Instruments/National Semiconductor): Active status, ±3% tolerance matching original specification, ROHS3 compliant
All substitute parts maintain ROHS3 compliance and REACH unaffected status. Selection should prioritize active product status and full temperature range compatibility where application requirements permit.
Frequently Asked Questions (FAQ)
Q: Can LM385 series parts directly replace the ZRC250A03STZ?
A: Yes. LM385 series parts with 2.5V fixed output and TO-92-3 package provide direct functional replacement. Verify operating temperature range requirements: LM385 variants are rated 0°C ~ 70°C, while the original supports -40°C ~ 85°C. For full temperature range applications, use LM285 series alternatives.
Q: What is the difference between ±3% and ±1.5% tolerance substitutes?
A: The ZRC250A03STZ specifies ±3% tolerance. Substitute parts with ±1.5% tolerance offer enhanced precision and tighter voltage regulation. Both are functionally compatible; tolerance selection depends on circuit requirements. ±1.5% parts provide superior performance in precision applications.
Q: Are all substitute parts ROHS3 compliant?
A: All listed substitute parts are ROHS3 compliant and REACH unaffected, matching the environmental compliance of the original ZRC250A03STZ.
Q: Does package variation affect substitution?
A: All substitute parts use TO-92-3 through-hole package configuration. Packaging format (Cut Tape, Tape & Reel, or Bulk) does not affect electrical compatibility, only procurement and handling logistics.
Q: Which substitute offers the best temperature stability?
A: LM285 series parts with 20ppm/°C temperature coefficient provide superior temperature stability compared to the original 90ppm/°C specification. LM385 series parts with 150ppm/°C coefficient offer moderate stability. Selection depends on application thermal performance requirements.
Q: Can I use a substitute with higher output current rating?
A: Yes. The ZRC250A03STZ specifies 5 mA output current. All substitute parts rated 20 mA are backward compatible and provide additional current capacity without affecting circuit operation.
Q: What inventory considerations apply to substitution?
A: LM285LPR-2-5 and LM385BLPR-2-5 offer highest inventory availability (9100 and 12200 units respectively). Verify supplier stock status for production quantities before design finalization.
Alternative Parts
SJ6012L2TP
Littelfuse Inc.
6 Alternative Parts
JMK107BBJ476MA-RE
Taiyo Yuden
10 Alternative Parts
GMK107BBJ475MA-T
Taiyo Yuden
5 Alternative Parts
SJ6020N2ARP
Littelfuse Inc.
3 Alternative Parts
SJ6025R2ATP
Littelfuse Inc.
4 Alternative Parts
2474-05L
API Delevan Inc.
1 Alternative Parts
4590R-684K
API Delevan Inc.
1 Alternative Parts
CM6560R-334
API Delevan Inc.
1 Alternative Parts
CM6460-104
API Delevan Inc.
1 Alternative Parts
5526-12
API Delevan Inc.
1 Alternative Parts