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Microchip Technology 1N4127UR-1/TR
- Part No.:
- 1N4127UR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N4127UR-1/TR.pdf
- Description:
- DIODE ZENER 56V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,217
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Product details
Overview
1N4127UR-1/TR from Microsemi is a 500 mW, 56 V, ±5% tolerance surface-mount Zener diode in DO-213AA (MELF) glass package, qualified to JANTXV level per MIL-PRF-19500/435, with 300 °C/W junction-to-ambient thermal resistance and 40 µV/√Hz max noise density at 56 V - used for precision voltage regulation in aerospace power conditioning and high-reliability analog reference circuits.
For engineers reviewing the 1N4127UR-1/TR datasheet, 1N4127UR-1/TR pinout, 1N4127UR-1/TR application, or 1N4127UR-1/TR equivalent, key selection criteria include Zener voltage accuracy (±5%), low noise density (40 µV/√Hz), hermetic DO-213AA packaging, MIL-qualified reliability, and thermal derating behavior above 125 °C.
Technical Context
This device operates as a two-terminal voltage reference in reverse-biased breakdown mode, with nominal Zener voltage of 56 V at 250 mA test current (IZT), dynamic impedance of 300 Ω at IZT, and temperature coefficient of +0.100 %/°C - indicating positive drift over temperature. Its metallurgically bonded construction ensures stable long-term regulation under thermal cycling.
The DO-213AA package enables high-power density (500 mW) in a compact MELF form factor, with cathode band polarity marking and tin-lead or RoHS-compliant matte-tin plating. Reverse leakage is limited to ≤0.01 µA at VR = 42.6 V, supporting low-power biasing in precision analog stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 56 V ±5% at 250 mA - defines stable regulation point for mid-range supply rail clamping or reference generation. |
| Power Dissipation | 500 mW at 25 °C, linearly derates to zero at 175 °C - sets maximum continuous power handling on standard FR4 PCBs. |
| Zener Impedance (ZZT) | 300 Ω at 250 mA - determines output voltage variation under load current changes; critical for low-noise reference stability. |
| Noise Density (ND) | 40 µV/√Hz at 56 V - quantifies broadband voltage noise; impacts signal integrity in high-gain analog front-ends. |
| Reverse Leakage (IR) | ≤0.01 µA at 42.6 V - ensures minimal parasitic current draw in high-impedance bias networks. |
| Temp. Coefficient (αVZ) | +0.100 %/°C - indicates predictable positive voltage drift with temperature; enables compensation in reference designs. |
| Junction Temp. Range | –65 °C to +175 °C - supports operation in extended industrial, aerospace, and downhole environments. |
Pinout & Package
DO-213AA (SOD-80 / CDLL34) hermetically sealed glass MELF package with axial symmetry and cathode indicated by single dark band. Two-terminal device: banded end is cathode (positive during Zener operation); opposite end is anode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Zener regulation terminal | Connected to higher potential node; reverse-biased to maintain 56 V reference across load. |
| Anode (unbanded end) | Reference return path | Connected to circuit ground or lower-potential rail; completes Zener current path. |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/435 qualification | JANTXV screening available - guarantees performance and reliability for defense/aerospace applications with full lot traceability. |
| Metallurgical bond construction | Eliminates wire bonds and interfacial delamination risk - enhances thermal cycling endurance and long-term parameter stability. |
| Hermetic glass MELF package | DO-213AA sealing prevents moisture ingress and contamination - maintains Zener voltage accuracy over 20+ year field life. |
| Low capacitance design | Typical <1.5 pF (per Figure 3) - minimizes high-frequency loading in RF bias networks and fast-switching regulator feedback paths. |
| ESD robustness | Non-sensitive per MIL-STD-750 Method 1020 - withstands >4 kV HBM without parameter shift, simplifying handling in production. |
Applications
| Aerospace Power Conditioning | High-Voltage Analog Reference |
|---|---|
Use Scenario: Regulating auxiliary 56 V bus in satellite power distribution units exposed to radiation and thermal vacuum. IC Role / Device Role / Timing Role: Two-terminal Zener reference providing stable voltage clamp independent of load current variations. Use Value: Radiation-hardened construction and JANTXV qualification ensure uninterrupted regulation under TID >100 krad(Si). |
Use Scenario: Generating precision 56 V reference for high-voltage DAC buffers and photomultiplier tube bias supplies. IC Role / Device Role / Timing Role: Primary voltage reference element in low-drift, low-noise analog subsystems. Use Value: 40 µV/√Hz noise density and +0.100 %/°C TC enable sub-0.1% total error over –55 °C to +125 °C. |
| Industrial Sensor Excitation | Military Test Equipment Calibration |
Use Scenario: Supplying stable excitation voltage to strain gauge bridges in oilfield downhole tools operating at 175 °C ambient. IC Role / Device Role / Timing Role: High-temperature Zener regulator maintaining bridge bias despite extreme thermal gradients. Use Value: Full-spec operation up to +175 °C junction temperature with no derating loss below 125 °C case temperature. |
Use Scenario: Calibrating 50–60 V ranges in portable military-grade multimeters and automated test systems. IC Role / Device Role / Timing Role: Traceable voltage standard referenced to NIST-traceable metrology labs. Use Value: ±5% initial tolerance and <0.01 µA leakage support calibration uncertainty <0.05% FS over 5-year intervals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CDLL4127-1 | Commercial-grade version; same 56 V VZ, 300 Ω ZZT, and DO-213AA package but lacks MIL screening. | Not qualified to JANTXV; suitable for non-mission-critical industrial or telecom infrastructure. | Select when cost sensitivity outweighs need for radiation hardness or extended temperature validation. |
| 1N4127UR-1 | Same electrical specs and package as 1N4127UR-1/TR, but supplied in bulk or ammo pack - no tape-and-reel packaging. | Requires manual placement or different feeder setup; unsuitable for high-volume SMT lines requiring TR delivery. | Choose only for prototyping, low-volume repair, or legacy assembly processes without TR capability. |
Compared with CDLL4127-1 and 1N4127UR-1, the 1N4127UR-1/TR offers JANTXV qualification plus EIA-481-compliant 12 mm tape-and-reel delivery - enabling both high-reliability deployment and automated manufacturing readiness in one part number.
Availability
1N4127UR-1/TR is available at Aetrix Electronics and suitable for aerospace power conditioning, high-voltage analog reference, industrial sensor excitation, and military test equipment calibration requiring stable component supply across extended temperature and radiation environments.
Supply support for 1N4127UR-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 analog and mixed-signal components for aerospace, defense, and industrial markets.
The 1N4127UR-1/TR belongs to Microsemi's MIL-qualified Zener diode family designed for precision voltage regulation in mission-critical systems where parametric stability, radiation tolerance, and long-term reliability are mandatory.
FAQ
What is the Zener voltage tolerance of the 1N4127UR-1/TR?
The 1N4127UR-1/TR has a nominal Zener voltage of 56 V with a standard tolerance of ±5%, as defined in the Electrical Characteristics table on page 4 of T4-LDS-0245 Rev. 2. This tolerance applies at 250 mA test current and 25 °C ambient, and remains valid across the full qualified temperature range when derated per the power curve.
Is the 1N4127UR-1/TR RoHS compliant?
The 1N4127UR-1/TR is not RoHS compliant by default; RoHS compliance (e3 suffix) is available only on commercial-grade variants like CDLL4127-1. The 1N4127UR-1/TR retains tin-lead plating per MIL-STD-750, ensuring solderability and reliability for high-reliability military and aerospace applications.
What does the "TR" suffix mean in 1N4127UR-1/TR?
The "TR" suffix in 1N4127UR-1/TR indicates tape-and-reel packaging per EIA-481-1-A standard using 12 mm carrier tape. This format supports automated SMT placement and is required for high-volume production; the base part 1N4127UR-1 is available in bulk or ammo pack formats instead.
Can the 1N4127UR-1/TR be used in place of the 1N4127UR-1?
Yes - the 1N4127UR-1/TR shares identical electrical, thermal, and mechanical specifications with 1N4127UR-1; the only difference is packaging. Both use DO-213AA package, 56 V Zener voltage, and JANTXV qualification. The TR variant simply adds EIA-481 tape-and-reel delivery for SMT line compatibility.
What is the maximum reverse leakage current for the 1N4127UR-1/TR?
The maximum reverse leakage current (IR) for the 1N4127UR-1/TR is 0.01 µA at VR = 42.6 V, as specified in the Electrical Characteristics table. This ultra-low leakage supports high-impedance bias networks and preserves accuracy in precision reference applications where shunt current must be minimized.
1N4127UR-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):
- 56 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 300 Ohms
- Current - Reverse Leakage @ Vr:
- 10 nA @ 42.6 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-213AA
1N4127UR-1/TR FAQ
1.How can I place an order for 1N4127UR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4127UR-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 1N4127UR-1/TR reliable?
The price and inventory of 1N4127UR-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 1N4127UR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N4127UR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4127UR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4127UR-1/TR?
1N4127UR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4127UR-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 1N4127UR-1/TR?
For technical support, including 1N4127UR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4127UR-1/TR requirements.
6.How does Aetrix verify that 1N4127UR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N4127UR-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 1N4127UR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N4127UR-1/TR?
All 1N4127UR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4127UR-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 1N4127UR-1/TR part is unused and in its original packaging.
Return procedure for 1N4127UR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4127UR-1/TR Tags
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