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Microchip Technology 1N4127-1/TR
- Part No.:
- 1N4127-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N4127-1/TR.pdf
- Description:
- DIODE ZENER 56V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:9,525
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Product details
Overview
1N4127-1/TR 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 for high-reliability voltage regulation in aerospace and defense power supplies.
For engineers reviewing the 1N4127-1/TR datasheet, 1N4127-1/TR pinout, 1N4127-1/TR application, or 1N4127-1/TR equivalent, key selection criteria include its 56 V nominal Zener voltage at 250 mA test current, 300 Ω maximum dynamic impedance, 0.01 µA maximum reverse leakage at 42.6 V, +0.100 %/°C temperature coefficient, and hermetically sealed glass construction for stable operation across –65 °C to +175 °C.
Technical Context
This Zener diode operates in reverse breakdown to maintain precise DC reference voltage under varying load and temperature conditions. Its metallurgical bond ensures low noise density (1 µV/√Hz typical at lower voltages), minimal capacitance, and radiation hardness per Microsemi MicroNote 050.
Designed for regulated power supply feedback paths and precision voltage references, it delivers stable regulation with 40 mW maximum noise power spectral density and thermal resistance of 250 °C/W junction-to-lead when mounted with 10 mm lead length - enabling reliable operation up to 175 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 56 V at 250 mA test current - sets exact regulation point in feedback loops |
| Power Dissipation | 500 mW at 25 °C - supports robust voltage reference without external heatsinking |
| Zener Impedance ZZT | 300 Ω max - limits output voltage variation under changing load current |
| Reverse Leakage IR | 0.01 µA max at 42.6 V - ensures minimal error current in high-impedance reference nodes |
| Temp. Coefficient αVZ | +0.100 %/°C - enables predictable drift compensation in wide-temperature designs |
| Junction Temp. Range | –65 °C to +175 °C - qualifies for extended-range military and avionics environments |
| Noise Density | 1 µV/√Hz typical - critical for low-noise analog references and sensor excitation |
Pinout & Package
DO-35 (DO-204AH) axial-leaded glass package with cathode indicated by band; banded end is positive during Zener regulation. Hermetically sealed, tin-lead or RoHS-compliant matte-tin plating, ~0.2 g weight, 1.0–1.5 inch lead length.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to circuit common; defines 0 V reference plane for regulation |
| Cathode | Zener output node | Banded end supplies regulated 56 V; must be biased positive relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| Metallurgical bond construction | Enables low-noise, high-stability regulation with <1 µV/√Hz noise at low voltages |
| MIL-PRF-19500/435 qualification | Validated reliability up to JANTXV level for mission-critical aerospace systems |
| Hermetic glass encapsulation | Prevents moisture ingress and parameter drift over decades in harsh environments |
| Non-ESD-sensitive design | Withstands handling without protection - compliant per MIL-STD-750 Method 1020 |
| Minimal junction capacitance | Typical <2 pF - preserves high-frequency stability in fast-switching regulator feedback paths |
Applications
| Avionics Power Reference | Satellite Voltage Monitor |
|---|---|
Use Scenario: Precision 56 V reference in triple-redundant DC-DC converter feedback networks on flight control computers. IC Role / Device Role / Timing Role: Zener diode provides primary voltage setpoint for error amplifier comparison. Use Value: JANTXV qualification and –65 °C to +175 °C operation ensure uninterrupted regulation during thermal cycling in stratospheric flight. | Use Scenario: Overvoltage detection threshold in solar array regulation circuits aboard LEO satellites. IC Role / Device Role / Timing Role: Serves as fixed-voltage clamp triggering comparator-based shutdown logic. Use Value: Radiation hardness and low leakage (<0.01 µA) prevent false trips during proton exposure events. |
| Ground-Based Radar Bias Supply | Tactical Radio RF Amplifier Bias |
Use Scenario: Stable bias voltage source for GaN HEMT gate drivers in pulsed radar transmitters. IC Role / Device Role / Timing Role: Zener regulates auxiliary 56 V rail feeding active bias controllers. Use Value: 300 Ω dynamic impedance minimizes voltage sag during 100 ns pulse edges, preserving amplifier linearity. | Use Scenario: Reference element in temperature-compensated RF power amplifier bias networks. IC Role / Device Role / Timing Role: Provides fixed 56 V node for thermistor-based compensation circuitry. Use Value: +0.100 %/°C tempco allows accurate modeling and cancellation of PA gain drift across –40 °C to +85 °C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4127US-1 | Same electrical specs, but in surface-mount DO-213AA package | Requires PCB rework for SMT assembly; no axial through-hole mounting | Select when automated assembly and board space constraints outweigh manual soldering needs |
| 1N4127-1e3 | Identical DO-35 package and performance, RoHS-compliant matte-tin plating | Not qualified to JANTXV; commercial-grade only | Select for cost-sensitive industrial applications where MIL-spec is not mandated |
Compared with 1N4127US-1 and 1N4127-1e3, the 1N4127-1/TR offers JANTXV reliability qualification and tape-and-reel packaging for automated insertion, while maintaining identical Zener voltage, impedance, and thermal performance in the legacy DO-35 form factor.
Availability
1N4127-1/TR is available at Aetrix Electronics and suitable for avionics power references, satellite voltage monitors, and ground-based radar bias supplies requiring stable component supply with full traceability and long-term obsolescence management.
Supply support for 1N4127-1/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 1N4127-1/TR belongs to Microsemi's legacy MIL-qualified Zener diode family, engineered specifically for voltage reference and regulation in mission-critical systems where parametric stability, radiation tolerance, and extreme temperature resilience are mandatory.
FAQ
What is the Zener voltage tolerance for 1N4127-1/TR?
The 1N4127-1/TR has a nominal Zener voltage of 56 V with a standard ±5% tolerance, as defined by JEDEC registration and confirmed in the Electrical Characteristics table on page 3 of T4-LDS-0245-2 Rev. 1. This tolerance applies under thermal equilibrium at 25 °C with 250 mA test current, and is consistent across all reliability levels including JANTXV.
Is 1N4127-1/TR qualified to JANTXV level?
Yes, the 1N4127-1/TR is qualified to JANTXV level per MIL-PRF-19500/435, as explicitly stated in the "Qualified Levels" section on page 1 of the datasheet. This qualification includes rigorous environmental, life, and parametric testing required for high-reliability aerospace and defense applications.
What does the "TR" suffix mean in 1N4127-1/TR?
The "TR" suffix in 1N4127-1/TR indicates tape-and-reel packaging per EIA-296 standard, enabling automated insertion during manufacturing. This packaging option is distinct from bulk or ammo-pack formats and is specified in the "Mechanical and Packaging" section on page 2 of the datasheet.
What is the maximum reverse leakage current for 1N4127-1/TR?
The maximum reverse leakage current (IR) for 1N4127-1/TR is 0.01 µA at 42.6 V (75% of nominal Zener voltage), as listed in the Electrical Characteristics table on page 3. This ultra-low leakage supports high-impedance reference designs where error currents must be minimized.
Does 1N4127-1/TR have radiation hardness specifications?
Yes, the 1N4127-1/TR is inherently radiation hard, as documented in Microsemi MicroNote 050 referenced in the Applications/Benefits section on page 1. Its metallurgically bonded glass construction and hermetic sealing provide proven tolerance to total ionizing dose (TID) and displacement damage in space and nuclear environments.
1N4127-1/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- 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:
- Through Hole
- Supplier Device Package:
- DO-204AH (DO-35)
1N4127-1/TR FAQ
1.How can I place an order for 1N4127-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4127-1/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 1N4127-1/TR reliable?
The price and inventory of 1N4127-1/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4127-1/TR is usually 5 days.
3.What payment methods are accepted for 1N4127-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4127-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4127-1/TR?
1N4127-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4127-1/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 1N4127-1/TR?
For technical support, including 1N4127-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4127-1/TR requirements.
6.How does Aetrix verify that 1N4127-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N4127-1/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 1N4127-1/TR meets industry standards.
7.What is the process for return or replacement of 1N4127-1/TR?
All 1N4127-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4127-1/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 1N4127-1/TR part is unused and in its original packaging.
Return procedure for 1N4127-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4127-1/TR Tags
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