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Microchip Technology 1N4712UR-1/TR
- Part No.:
- 1N4712UR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N4712UR-1/TR.pdf
- Description:
- DIODE ZENER 28V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,514
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Product details
Overview
1N4712UR-1/TR from Microsemi is a 28.0 V, ±5% tolerance, 500 mW surface-mount Zener diode in DO-213AA (SOD-80/MLL34) MELF glass package, tested at 50 µA, with 0.28 V regulation change between 10 µA and 100 µA, used for precision voltage reference and low-power regulation in industrial power supplies and sensor signal conditioning circuits.
For engineers reviewing the 1N4712UR-1/TR datasheet, 1N4712UR-1/TR pinout, 1N4712UR-1/TR application, or 1N4712UR-1/TR equivalent, key selection criteria include Zener voltage accuracy at low test current, hermetic glass packaging for reliability, thermal resistance (100 °C/W junction-to-end cap), minimal capacitance, and MIL-PRF-19500 up-screening compatibility.
Technical Context
The 1N4712UR-1/TR operates as a reverse-biased voltage reference with a nominal Zener voltage of 28.0 V at 50 µA, exhibiting 0.28 V regulation deviation (∆VZ) between 10 µA and 100 µA test points. Its metallurgically bonded silicon die within a hermetically sealed DO-213AA glass body ensures stable breakdown characteristics across -65 °C to +175 °C junction temperature range.
Designed for low-current regulation, it delivers 17.0 mA maximum Zener current (IZM) at rated 500 mW dissipation, with only 0.01 µA reverse leakage at 21.2 V (0.75 × VZ). The device's minimal junction capacitance supports high-frequency stability in feedback and reference paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 28.0 V at IZT = 50 µA - defines precise regulation point for low-power reference circuits |
| Tolerance | ±5% - standard grade accuracy suitable for non-critical biasing and clamping |
| Power Dissipation (PD) | 500 mW - enables stable operation up to 17.0 mA Zener current with proper PCB thermal design |
| Regulation Change (∆VZ) | 0.28 V (10–100 µA) - quantifies voltage drift under varying bias, critical for precision references |
| Reverse Leakage (IR) | 0.01 µA at 21.2 V - ensures negligible error current in high-impedance reference nodes |
| Junction Temp Range | -65 °C to +175 °C - supports operation in harsh industrial and aerospace environments |
| Thermal Resistance (RθJL) | 100 °C/W - requires end-cap thermal connection to PCB copper for reliable power handling |
Pinout & Package
DO-213AA (SOD-80 / MLL34) MELF glass package: hermetically sealed cylindrical body with metallized end caps; cathode indicated by single black band; polarity: banded end is cathode (positive during Zener operation).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Reference ground node | Connected to circuit common; forms low-impedance return path for Zener current |
| Cathode (banded end) | Regulated output node | Provides stable 28.0 V reference when reverse-biased; must be held positive relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass MELF construction | Eliminates moisture ingress and long-term parameter drift; qualified per MIL-PRF-19500 screening options |
| Metallurgical die bonding | Ensures robust thermal and electrical interface between silicon and end caps for high-reliability operation |
| Low 50 µA test current | Enables accurate voltage setting in ultra-low-power circuits such as battery-backed sensors and standby regulators |
| Minimal junction capacitance | Reduces high-frequency noise coupling in precision analog feedback loops and oscillator bias networks |
| RoHS-compliant option (e3 suffix) | Available with matte-tin plating for lead-free assembly while maintaining solderability per MIL-STD-750 |
Applications
| Industrial Power Supply Reference | Sensor Signal Conditioning |
|---|---|
Use Scenario: Providing stable 28 V reference for isolated DC-DC converter feedback networks in programmable logic controllers. IC Role / Device Role / Timing Role: Zener diode acting as primary voltage reference for optocoupler-based error amplification. Use Value: Maintains regulation accuracy over wide temperature (-40 °C to +85 °C ambient) with <0.3 V drift, ensuring consistent output voltage tolerance. | Use Scenario: Biasing bridge amplifier inputs in strain-gauge transducers operating from 24 V rails. IC Role / Device Role / Timing Role: Precision shunt reference establishing common-mode voltage for instrumentation amplifiers. Use Value: Low 50 µA test current minimizes loading on high-impedance sensor outputs while delivering 28 V stability within ±5%. |
| Aerospace Avionics Monitoring | Test & Measurement Equipment |
Use Scenario: Voltage clamping and rail stabilization in radiation-hardened monitoring circuits for flight control subsystems. IC Role / Device Role / Timing Role: Radiation-tolerant Zener regulator protecting ADC input stages from transient overvoltage. Use Value: Inherent radiation hardness per MicroNote 050 and hermetic sealing ensure long-term parametric stability in high-dose environments. | Use Scenario: Calibration reference source in portable multimeters requiring traceable 28 V output. IC Role / Device Role / Timing Role: Primary shunt reference in auto-ranging voltage measurement front-ends. Use Value: Tight ∆VZ (0.28 V) and low leakage (<0.01 µA) enable repeatable 4½-digit accuracy without active compensation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4712A-TR | Same 28 V rating and DO-213AA package but manufactured by ON Semiconductor; ±5% tolerance; 50 µA IZT; 0.3 V ∆VZ | Higher regulation deviation (0.3 V vs. 0.28 V); identical thermal and leakage specs | Preferred where second-source qualification is required; no PCB layout change needed |
| BZX55C27-TR | 27 V nominal (not 28 V); DO-35 axial package; 5% tolerance; 5 mA IZT; higher leakage (1 µA @ 20.3 V) | Lower voltage rating and axial through-hole mounting limit use in compact SMT designs | Select only if 27 V suffices and board supports axial components; not drop-in compatible |
Compared with 1N4712A-TR and BZX55C27-TR, the 1N4712UR-1/TR offers tighter regulation linearity (0.28 V ∆VZ) and superior hermetic reliability in MELF format, making it optimal for space-constrained, high-stability applications where voltage accuracy and environmental resilience are prioritized over cost or multi-source availability.
Availability
1N4712UR-1/TR is available at Aetrix Electronics and suitable for industrial power supply reference, sensor signal conditioning, aerospace avionics monitoring, and test & measurement equipment requiring stable component supply and long-term parametric consistency.
Supply support for 1N4712UR-1/TR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microsemi Corporation (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability, radiation-hardened, and precision analog components for defense, aerospace, and industrial markets.
The 1N4678UR-1 through 1N4717UR-1 series was engineered to deliver JEDEC-standard Zener performance in hermetic MELF packages with MIL-PRF-19500 up-screening capability-targeting applications demanding long-term stability under thermal, mechanical, and radiation stress.
FAQ
What is the Zener voltage and test current for 1N4712UR-1/TR?
The 1N4712UR-1/TR has a nominal Zener voltage of 28.0 V measured at a test current (IZT) of 50 µA. This low test current enables accurate voltage setting in ultra-low-power circuits. The device maintains this regulation point across its specified junction temperature range of -65 °C to +175 °C, and the 1N4712UR-1/TR datasheet confirms ±5% tolerance at this condition.
Is 1N4712UR-1/TR RoHS compliant?
Yes, the 1N4712UR-1/TR is available in RoHS-compliant version with matte-tin plating (designated by "e3" suffix in full nomenclature), but only for commercial-grade units. The RoHS-compliant 1N4712UR-1/TR meets lead-free assembly requirements and is solderable per MIL-STD-750, method 2026, with no compromise to hermetic sealing or electrical performance.
What package type does 1N4712UR-1/TR use?
The 1N4712UR-1/TR uses the DO-213AA package-also known as SOD-80 or MLL34-a hermetically sealed glass MELF (Metal Electrode Leadless Face) surface-mount package. Its cylindrical geometry with metallized end caps provides superior thermal conduction and reliability versus plastic SMD packages, and the 1N4712UR-1/TR marking includes a single black band indicating the cathode terminal.
What is the maximum Zener current (IZM) for 1N4712UR-1/TR?
The maximum dc Zener current (IZM) for the 1N4712UR-1/TR is 17.0 mA at 25 °C ambient, derived from its 500 mW power rating and 28.0 V Zener voltage. This value assumes proper thermal management via end-cap conduction; derating applies above 50 °C ambient or 125 °C end-cap temperature, as defined in the 1N4712UR-1/TR power derating curve.
Does 1N4712UR-1/TR support MIL-PRF-19500 up-screening?
Yes, the 1N4712UR-1/TR platform supports MIL-PRF-19500 up-screening-available under appropriate reliability level prefixes (e.g., MQ, MX, MV, MSP) per the part nomenclature guide. While the base 1N4712UR-1/TR is commercial-grade, the same die and package construction can be processed to meet military screening requirements, including extended temperature, life test, and hermeticity validation.
1N4712UR-1/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 28 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- 10 nA @ 21.2 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 100 mA
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-213AA
1N4712UR-1/TR FAQ
1.How can I place an order for 1N4712UR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4712UR-1/TR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 1N4712UR-1/TR reliable?
The price and inventory of 1N4712UR-1/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4712UR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N4712UR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4712UR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4712UR-1/TR?
1N4712UR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4712UR-1/TR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 1N4712UR-1/TR?
For technical support, including 1N4712UR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4712UR-1/TR requirements.
6.How does Aetrix verify that 1N4712UR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N4712UR-1/TR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 1N4712UR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N4712UR-1/TR?
All 1N4712UR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4712UR-1/TR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 1N4712UR-1/TR part is unused and in its original packaging.
Return procedure for 1N4712UR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4712UR-1/TR Tags
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