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Microchip Technology 1N4127-1
- Part No.:
- 1N4127-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N4127-1.pdf
- Description:
- DIODE ZENER 56V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:9,064
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Product details
Overview
1N4127-1 from Microsemi is a 500 mW, 56 V, ±5% tolerance metallurgically bonded glass Zener diode in DO-35 (DO-204AH) axial package, qualified to JANTXV level per MIL-PRF-19500/435. It delivers stable voltage regulation at 250 mA test current with 300 Ω dynamic impedance and +0.100 %/°C temperature coefficient, used in precision reference and power supply feedback circuits.
For engineers reviewing the 1N4127-1 datasheet, 1N4127-1 pinout, 1N4127-1 application, or 1N4127-1 equivalent, key selection criteria include Zener voltage accuracy, low noise density (1 µV/√Hz), radiation hardness, thermal resistance (250 °C/W junction-to-lead), and military-grade reliability qualification.
Technical Context
This Zener diode operates in reverse breakdown with cathode band indicating polarity, requiring banded end positive for regulation. Its metallurgical bond ensures mechanical stability under thermal cycling and shock, while hermetic glass sealing enables operation from –65 °C to +175 °C junction temperature.
The device exhibits 40 µV/√Hz max noise density at ≥6.8 V, falling to 1 µV/√Hz at lower voltages; at 56 V, it achieves 42.6 mA maximum Zener current and 6.7 mA leakage current at rated voltage, with capacitance below 2 pF per typical curves.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 56 V ±5% at 250 mA - defines precise regulation point for feedback loops and references |
| Power Dissipation | 500 mW @ 25 °C - supports stable operation in compact through-hole designs with linear derating above 50 °C |
| Dynamic Impedance ZZT | 300 Ω @ 250 mA - determines output voltage variation under load transients |
| Temp Coefficient αVZ | +0.100 %/°C - enables predictable drift compensation in wide-temperature industrial systems |
| Noise Density ND | 1 µV/√Hz - critical for low-noise analog references and sensor excitation circuits |
| Reverse Leakage IR | 0.01 µA @ 42.6 V - ensures minimal error current in high-impedance bias networks |
| Junction Temp Range | –65 °C to +175 °C - validated for aerospace, defense, and downhole electronics |
Pinout & Package
DO-35 (DO-204AH) axial-leaded glass package with hermetically sealed body, tin-lead or RoHS-compliant matte-tin plating, and cathode indicated by color band. Weight ≈ 0.2 g; lead length 25.4–38.1 mm; body diameter 1.42–2.29 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Non-banded lead | Connected to circuit ground or lower potential node in shunt regulator configuration |
| Cathode | Banded lead | Connected to regulated voltage node; must be held positive relative to anode for Zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/435 qualification | JANTXV-level screening ensures reliability in mission-critical avionics and space systems |
| Metallurgical bond construction | Eliminates interfacial delamination during thermal shock, extending lifetime in harsh environments |
| Radiation hardness | Inherently resistant to total ionizing dose (TID), supporting use in satellite power systems |
| Low capacitance | Typical <2 pF enables high-frequency stability in RF bias and fast-switching regulator feedback paths |
| ESD immunity | Non-sensitive per MIL-STD-750 Method 1020 - no handling precautions required in assembly |
Applications
| Avionics Power Reference | Downhole Sensor Excitation |
|---|---|
Use Scenario: Provides stable 56 V reference for analog-to-digital converter biasing in flight control computers. IC Role / Device Role / Timing Role: Shunt voltage reference regulating supply rail against load and temperature variation. Use Value: ±5% initial tolerance and +0.100 %/°C drift enable calibrated measurement accuracy over –55 °C to +125 °C operating range. | Use Scenario: Supplies excitation voltage to piezoresistive pressure transducers in oil/gas well logging tools. IC Role / Device Role / Timing Role: High-reliability Zener source maintaining constant bias despite extreme thermal cycling and vibration. Use Value: Hermetic DO-35 package and JANTXV qualification ensure uninterrupted operation at 175 °C junction temperature. |
| Defense Radar Bias Supply | Satellite Power Monitor |
Use Scenario: Sets threshold voltage for RF amplifier stage protection circuitry in ground-based radar transmitters. IC Role / Device Role / Timing Role: Overvoltage clamp protecting GaN HEMT gate drivers from transient spikes. Use Value: 300 Ω dynamic impedance and 1 µV/√Hz noise ensure fast response without injecting interference into sensitive RF paths. | Use Scenario: Serves as primary voltage reference in solar array regulator telemetry subsystems aboard LEO satellites. IC Role / Device Role / Timing Role: Radiation-hardened shunt reference enabling accurate bus voltage monitoring over 15-year mission life. Use Value: Inherent TID hardness and –65 °C to +175 °C operation eliminate need for shielding or derating in vacuum thermal environment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4127UR-1 | Same electrical specs, DO-213AA surface-mount package instead of DO-35 axial | Requires PCB rework for SMT assembly; not drop-in compatible with through-hole layouts | Select when automated placement and board space reduction are prioritized over legacy compatibility |
| 1N5255B | 56 V ±5%, 500 mW, but commercial-grade only; no MIL qualification or radiation hardness | Limited to non-mission-critical industrial controls; unsuitable for aerospace or defense deployments | Choose only for cost-sensitive, non-radiation environments where JANTXV screening is unnecessary |
Compared with 1N4127UR-1, the 1N4127-1 enables direct replacement in existing axial-leaded designs without layout change; versus 1N5255B, it provides verified radiation tolerance and extended temperature operation essential for high-integrity systems.
Availability
1N4127-1 is available at Aetrix Electronics and suitable for avionics power reference, downhole sensor excitation, and defense radar bias supply requiring stable component supply across long-lifecycle programs.
Supply support for 1N4127-1 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 aerospace-grade components.
The 1N4127-1 belongs to Microsemi's legacy MIL-qualified Zener diode family designed specifically for voltage regulation in defense, space, and industrial systems demanding extended temperature operation and long-term parametric stability.
FAQ
What is the Zener voltage tolerance for 1N4127-1?
The 1N4127-1 has a nominal Zener voltage of 56 V with a standard tolerance of ±5% at 250 mA test current, as specified in the Electrical Characteristics table on page 3 of the T4-LDS-0245-2 datasheet. This tolerance applies under thermal equilibrium conditions at 25 °C ambient temperature.
Is 1N4127-1 qualified to military standards?
Yes, the 1N4127-1 is qualified per MIL-PRF-19500/435 at JANTXV reliability level, including screening for vibration, thermal shock, and hermeticity. The "-1" suffix denotes compliance with this specification, and full qualification data is documented in Microsemi's T4-LDS-0245-2 revision 1 datasheet.
What is the maximum Zener current for 1N4127-1?
The maximum Zener current (IZM) for 1N4127-1 is 42.6 mA at 56 V, derived from its 500 mW power rating and voltage drop. This value is explicitly listed in the Electrical Characteristics table on page 3 of the official datasheet under the "MAXIMUM ZENER CURRENT IZM" column.
Does 1N4127-1 have low noise performance?
Yes, the 1N4127-1 achieves a maximum noise density of 1 µV/√Hz, consistent with the family-wide specification for devices ≥6.8 V. This low-noise characteristic is confirmed in the FEATURES section and supported by Figure 1 (Noise Density Measurement Circuit) in the T4-LDS-0245-2 datasheet.
What package type does 1N4127-1 use?
The 1N4127-1 uses the DO-35 (also designated DO-204AH) axial-leaded, hermetically sealed glass package. Mechanical dimensions-including body diameter (1.42–2.29 mm), lead length (25.4–38.1 mm), and weight (~0.2 g)-are detailed in the PACKAGE DIMENSIONS section on page 5 of the datasheet.
1N4127-1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Bulk
- 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:
- Through Hole
- Supplier Device Package:
- DO-204AH (DO-35)
1N4127-1 FAQ
1.How can I place an order for 1N4127-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4127-1 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 1N4127-1 reliable?
The price and inventory of 1N4127-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4127-1 is usually 5 days.
3.What payment methods are accepted for 1N4127-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4127-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4127-1?
1N4127-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4127-1 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 1N4127-1?
For technical support, including 1N4127-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4127-1 requirements.
6.How does Aetrix verify that 1N4127-1 is sourced from the original manufacturer or authorized distributors?
All 1N4127-1 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 1N4127-1 meets industry standards.
7.What is the process for return or replacement of 1N4127-1?
All 1N4127-1 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4127-1, 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 1N4127-1 part is unused and in its original packaging.
Return procedure for 1N4127-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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