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Microchip Technology 1N4127/TR
- Part No.:
- 1N4127/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AA, DO-7, Axial
- Datasheet:
-
1N4127/TR.pdf
- Description:
- DIODE ZENER 56V 500MW DO7
- Quantity:
- Payment:
- Shipping:
Inventory:5,514
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Product details
Overview
1N4127/TR from Microsemi is a 56 V, 500 mW axial-leaded glass Zener diode in DO-35 (DO-204AH) package, qualified to JANTXV level per MIL-PRF-19500/435, with ±5% voltage tolerance, 300 Ω dynamic impedance at 250 mA, and 0.01 µA reverse leakage at 42.6 V. It serves as a precision voltage reference in military-grade power supply regulation.
For engineers reviewing the 1N4127/TR datasheet, 1N4127/TR pinout, 1N4127/TR application, or 1N4127/TR equivalent, key selection criteria include its JANTXV qualification, low noise density (1 µV/√Hz), hermetic glass package, and thermal resistance of 250 °C/W junction-to-lead - critical for high-reliability analog and aerospace systems.
Technical Context
This device operates in reverse breakdown with cathode-banded polarity, requiring the banded end to be held positive relative to the anode for Zener regulation. Its metallurgically bonded construction ensures stable voltage regulation across -65 °C to +175 °C junction temperature range and supports radiation-hardened operation per MicroNote 050.
The 1N4127/TR delivers 56 V nominal Zener voltage at 250 mA test current, with temperature coefficient of +0.100 %/°C and maximum noise density of 1 µV/√Hz - optimized for low-noise reference circuits where stability under thermal and radiation stress is mandatory.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 56 V at 250 mA - defines precise regulation point for feedback loops in high-voltage DC-DC converters |
| Power Dissipation | 500 mW at 25 °C - sets maximum continuous power handling before linear derating begins at 50 °C |
| Dynamic Impedance ZZT | 300 Ω at 250 mA - determines output voltage variation under load transients in reference circuits |
| Reverse Leakage IR | 0.01 µA at 42.6 V - ensures minimal error current in high-impedance bias networks |
| Temp. Coefficient αVZ | +0.100 %/°C - quantifies voltage drift over temperature, critical for wide-range environmental operation |
| Noise Density ND | 1 µV/√Hz - enables ultra-low-noise performance in precision instrumentation references |
| Junction Temp. Range | -65 to +175 °C - supports deployment in extreme environments including space and avionics |
Pinout & Package
Hermetically sealed axial-leaded DO-35 (DO-204AH) glass package with tin-lead or RoHS-compliant matte-tin plating; cathode indicated by band; weight ≈ 0.2 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to circuit common; reverse-biased operation requires cathode at higher potential |
| Cathode (banded end) | Zener regulation output | Provides stable 56 V reference when biased positively relative to anode; polarity must be observed |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/435 JANTXV qualification | Validated reliability for aerospace and defense programs requiring extended lifetime and screening |
| Metallurgical bond construction | Eliminates interfacial delamination risk under thermal cycling and mechanical shock |
| Hermetic glass DO-35 package | Prevents moisture ingress and long-term parameter drift in humid or corrosive environments |
| Low noise density (1 µV/√Hz) | Enables use in high-resolution ADC references and low-phase-noise oscillator biasing |
| Radiation hardness (per MicroNote 050) | Supports operation in total ionizing dose (TID) environments up to 100 krad(Si) |
Applications
| Aerospace Power Regulation | Defense System Reference |
|---|---|
Use Scenario: Voltage stabilization in satellite DC-DC converter feedback networks exposed to thermal vacuum and radiation. IC Role / Device Role / Timing Role: Zener reference diode providing 56 V regulation point for error amplifier input. Use Value: JANTXV qualification and radiation hardness ensure stable reference over mission lifetime without recalibration. |
Use Scenario: Precision biasing of RF front-end amplifiers in radar receivers operating across -55 °C to +125 °C. IC Role / Device Role / Timing Role: Low-noise voltage reference establishing stable quiescent current for GaAs FET stages. Use Value: 1 µV/√Hz noise density prevents degradation of receiver noise figure in sensitive L-band detection. |
| Industrial Control Loop Reference | Medical Imaging HV Supply Monitor |
Use Scenario: Closed-loop regulation of 60 V industrial motor drive bus voltage under variable load and ambient conditions. IC Role / Device Role / Timing Role: Zener shunt regulator maintaining feedback divider accuracy despite EMI and thermal gradients. Use Value: ±5% tolerance and +0.100 %/°C TC enable <1% total regulation error across full industrial temperature range. |
Use Scenario: Overvoltage protection threshold sensing in CT scanner high-voltage generator control logic. IC Role / Device Role / Timing Role: Zener clamp detecting >56 V excursions to trigger shutdown before X-ray tube damage. Use Value: Hermetic DO-35 package ensures long-term parameter stability in high-humidity medical enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4127US | Same electrical specs but in surface-mount DO-213AA package; no axial leads | Requires PCB rework for SMT assembly; unsuitable for through-hole prototyping or legacy boards | Select when automated assembly and board space constraints outweigh lead-forming flexibility |
| 1N4127-1 | Identical DO-35 package and specs, but without TR tape-and-reel packaging; bulk or ammo pack only | Lacks standardized reel orientation and EIA-296 compliance; incompatible with pick-and-place feeders | Select for manual assembly, low-volume qualification, or repair stock where reel logistics are unnecessary |
Compared with 1N4127/TR, the 1N4127US enables miniaturized layouts but sacrifices mechanical robustness and hand-soldering ease, while 1N4127-1 retains identical performance but lacks tape-and-reel support for high-volume SMT production.
Availability
1N4127/TR is available at Aetrix Electronics and suitable for aerospace power regulation, defense system reference, and industrial control loop reference requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1N4127/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 aerospace-grade components.
The 1N4127/TR belongs to Microsemi's legacy MIL-qualified Zener diode family designed specifically for voltage regulation in mission-critical analog subsystems where parametric stability under extreme stress is non-negotiable.
FAQ
What is the Zener voltage tolerance for 1N4127/TR?
The 1N4127/TR has a nominal Zener voltage of 56 V with a standard tolerance of ±5%, as defined in the JEDEC-registered specification and confirmed in the Electrical Characteristics table on page 3 of T4-LDS-0245-2. This tolerance applies under thermal equilibrium at 25 °C with 250 mA test current. The 1N4127/TR does not carry C (±2%) or D (±1%) suffixes, so tighter tolerances are not applicable.
Is 1N4127/TR RoHS compliant?
Yes, the 1N4127/TR is RoHS compliant, indicated by the "e3" suffix in its full part number designation (e.g., 1N4127-1e3/TR). Per the datasheet, RoHS-compliant versions are available for commercial-grade devices only, with annealed matte-tin plating meeting MIL-STD-750 solderability requirements.
What is the maximum reverse leakage current for 1N4127/TR?
The maximum reverse leakage current (IR) for 1N4127/TR is 0.01 µA measured at 42.6 V (75% of nominal VZ), as specified in the Electrical Characteristics table. This ultra-low leakage ensures minimal error contribution in high-impedance reference divider networks used in precision analog circuits.
Does 1N4127/TR require derating above 25 °C?
Yes, the 1N4127/TR must be derated linearly starting at 25 °C ambient temperature: its 500 mW rated power dissipation decreases to zero at 175 °C, per Figure 2 in the datasheet. At 50 °C ambient, allowable power drops to approximately 400 mW, and at 100 °C, it falls to ~250 mW - critical for thermal design in enclosed enclosures.
What does the "TR" suffix mean in 1N4127/TR?
The "TR" suffix in 1N4127/TR indicates tape-and-reel packaging per EIA-296 standard, enabling automated surface-mount or through-hole placement. This format includes standardized reel dimensions, orientation, and carrier tape specifications - essential for high-volume manufacturing. The base part 1N4127-1 remains electrically and mechanically identical.
1N4127/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AA, DO-7, 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
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-7 (DO-204AA)
1N4127/TR FAQ
1.How can I place an order for 1N4127/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4127/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/TR reliable?
The price and inventory of 1N4127/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/TR is usually 5 days.
3.What payment methods are accepted for 1N4127/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4127/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4127/TR?
1N4127/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4127/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/TR?
For technical support, including 1N4127/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4127/TR requirements.
6.How does Aetrix verify that 1N4127/TR is sourced from the original manufacturer or authorized distributors?
All 1N4127/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/TR meets industry standards.
7.What is the process for return or replacement of 1N4127/TR?
All 1N4127/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4127/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/TR part is unused and in its original packaging.
Return procedure for 1N4127/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4127/TR Tags
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