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Microchip Technology JANTX1N4128D-1
- Part No.:
- JANTX1N4128D-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
JANTX1N4128D-1.pdf
- Description:
- DIODE ZENER 60V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:7,134
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Product details
Overview
JANTX1N4128D-1 from Microsemi is a 60 V, 1% tolerance, 500 mW metallurgically bonded glass Zener diode in DO-35 package, qualified to MIL-PRF-19500/435 JANTX level for high-reliability voltage regulation in aerospace and defense power supplies.
For engineers reviewing the JANTX1N4128D-1 datasheet, JANTX1N4128D-1 pinout, JANTX1N4128D-1 application, or JANTX1N4128D-1 equivalent, key selection criteria include Zener voltage accuracy (±1%), low noise density (1 µV/√Hz), radiation hardness, and military-grade thermal derating behavior up to +175 °C junction temperature.
Technical Context
This device operates as a precision shunt voltage regulator with a nominal Zener voltage of 60.0 V at 250 mA test current, exhibiting a positive temperature coefficient of +0.100 %/°C and dynamic impedance of 400 Ω at IZT. Its metallurgical bond construction ensures stable breakdown characteristics under thermal cycling and radiation exposure.
Designed for operation in the reverse-biased breakdown region, it delivers regulated output with ≤0.01 µA reverse leakage at VR = 45.6 V and supports stable regulation across 13–45.6 mA operating current range while maintaining <1 µV/√Hz noise density below 1 kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 60.0 V ±1% at 250 mA - enables precise reference generation for 60 V rail monitoring and overvoltage clamping |
| Power Dissipation | 500 mW at 25 °C, linearly derated to zero at 175 °C - defines maximum continuous thermal load on PCB traces |
| Dynamic Impedance ZZT | 400 Ω at 250 mA - determines regulation stiffness and output voltage variation under load transients |
| Noise Density ND | 1 µV/√Hz - critical for low-noise analog references and precision instrumentation front-ends |
| Temp Coefficient αVZ | +0.100 %/°C - quantifies drift magnitude per degree Celsius in high-temperature environments |
| Reverse Leakage IR | ≤0.01 µA at 45.6 V - ensures minimal standby current in battery-backed or ultra-low-power circuits |
| Junction Temp Range | −65 to +175 °C - supports operation in extended-temperature avionics and space-qualified systems |
Pinout & Package
DO-35 (DO-204AH) axial-leaded hermetically sealed glass package with cathode indicated by band; operated with banded end positive for Zener regulation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to system ground or lowest potential point in shunt regulator configuration |
| Cathode | Zener regulation output | Provides stable 60 V reference when reverse-biased; must be connected to unregulated input via current-limiting resistor |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/435 JANTX qualification | Validated reliability for aerospace and defense applications requiring screening per military standards |
| Metallurgical bond construction | Eliminates interfacial delamination risk under thermal shock and mechanical vibration |
| 1% Zener voltage tolerance | Reduces need for post-assembly trimming in precision reference circuits |
| Radiation hardness | Inherent tolerance to total ionizing dose (TID) per Microsemi MicroNote 050 - suitable for low-earth orbit missions |
| Low capacitance | Typical <2 pF - preserves high-frequency stability in RF bias networks and fast-switching regulators |
Applications
| Aerospace Power Monitoring | Defense System Reference |
|---|---|
Use Scenario: Real-time monitoring of 60 V primary bus voltage in satellite power distribution units. IC Role / Device Role / Timing Role: Shunt Zener reference providing stable threshold for comparator-based overvoltage detection. Use Value: ±1% tolerance and +0.100 %/°C TC ensure trip-point accuracy remains within 0.6 V over −55 to +125 °C operational range. | Use Scenario: Precision voltage reference in missile guidance subsystem analog signal conditioning. IC Role / Device Role / Timing Role: Primary DC reference source for ADC biasing and DAC feedback loops. Use Value: 1 µV/√Hz noise density prevents degradation of 16-bit effective resolution in sensor data acquisition. |
| Radiation-Hardened Instrumentation | High-Temp Industrial Control |
Use Scenario: Onboard radiation dosimetry calibration in nuclear reactor monitoring equipment. IC Role / Device Role / Timing Role: Stable reference for charge-integration amplifier gain setting in pulse-height analysis circuits. Use Value: Inherent radiation hardness eliminates need for shielding or derating in high-dose-rate environments. | Use Scenario: Overvoltage protection in downhole oilfield telemetry power supplies operating at +150 °C ambient. IC Role / Device Role / Timing Role: Clamping element in transient voltage suppression network for 60 V DC input stage. Use Value: Junction temperature rating up to +175 °C allows direct mounting without heatsink in confined enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4128US-1 | Same electrical specs but in DO-213AA surface-mount package; no axial leads | Requires PCB rework for SMT assembly; unsuitable for through-hole prototyping or high-vibration mechanical retention | Select when board space is constrained and automated placement is available |
| JANS1N4128D-1 | Identical electrical and mechanical specs but qualified to JANS (highest MIL-PRF-19500 level) with full lot traceability and radiation testing | Required for mission-critical spaceflight hardware where single-event burnout (SEB) immunity must be documented | Select when full JANS certification and radiation test reports are mandated by program requirements |
Compared with JANTX1N4128D-1, the 1N4128US-1 offers identical regulation performance in a smaller footprint but sacrifices mechanical robustness and hand-solderability, while JANS1N4128D-1 adds full radiation characterization and lot-level screening at higher cost and longer lead time.
Availability
JANTX1N4128D-1 is available at Aetrix Electronics and suitable for aerospace power monitoring, defense system reference, and radiation-hardened instrumentation requiring stable component supply with guaranteed MIL-spec compliance and long-term obsolescence management.
Supply support for JANTX1N4128D-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) designs high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets.
The JANTX1N4128D-1 belongs to Microsemi's legacy MIL-qualified Zener diode family, engineered specifically for precision voltage regulation in harsh-environment systems where parametric stability and radiation tolerance are non-negotiable.
FAQ
What is the Zener voltage tolerance for JANTX1N4128D-1?
JANTX1N4128D-1 has a Zener voltage tolerance of ±1%, denoted by the "D" suffix in its part number per Microsemi's nomenclature. This is confirmed in the Electrical Characteristics table on page 3 of T4-LDS-0245-2 Rev. 1, where VZ = 60.0 V at IZT = 250 mA with 1% tolerance. The tighter tolerance reduces calibration overhead in precision reference designs compared to standard 5% variants like JANTX1N4128-1.
Is JANTX1N4128D-1 RoHS compliant?
No, JANTX1N4128D-1 is not RoHS compliant. Per the datasheet, RoHS-compliant versions (suffix "e3") are available only for commercial-grade parts, not for JAN, JANTX, JANTXV, or JANS qualified devices. JANTX1N4128D-1 retains traditional tin-lead plating to meet MIL-STD-750 solderability requirements and ensure compatibility with legacy aerospace assembly processes.
What is the maximum reverse leakage current for JANTX1N4128D-1?
The maximum reverse leakage current (IR) for JANTX1N4128D-1 is 0.01 µA at VR = 45.6 V, as specified in the Electrical Characteristics table on page 3. This ultra-low leakage supports use in battery-powered or energy-harvesting systems where standby current must remain below 10 nA, and confirms stable regulation well below the knee voltage.
Does JANTX1N4128D-1 require a heatsink in normal operation?
No, JANTX1N4128D-1 does not require an external heatsink under typical conditions. With a rated average power dissipation of 500 mW and thermal resistance RθJL = 250 °C/W at 3/8″ lead length, self-heating remains within limits up to ~125 mW at +70 °C ambient. Full 500 mW operation requires careful PCB copper area design per Figure 2 derating curve, but most reference applications operate well below this threshold.
How is polarity marked on JANTX1N4128D-1?
JANTX1N4128D-1 uses a cathode band marking on the glass body to indicate polarity: the banded end is the cathode and must be connected to the higher-potential side of the circuit for proper Zener regulation. This is explicitly stated in the Mechanical and Packaging section on page 2, and the device must be operated with the banded end positive relative to the anode to function as a shunt regulator.
JANTX1N4128D-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):
- 60 V
- Tolerance:
- ±1%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 400 Ohms
- Current - Reverse Leakage @ Vr:
- 10 nA @ 45.6 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C
- Grade:
- Military
- Qualification:
- MIL-PRF-19500/435
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AH (DO-35)
JANTX1N4128D-1 FAQ
1.How can I place an order for JANTX1N4128D-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTX1N4128D-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 JANTX1N4128D-1 reliable?
The price and inventory of JANTX1N4128D-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTX1N4128D-1 is usually 5 days.
3.What payment methods are accepted for JANTX1N4128D-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANTX1N4128D-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JANTX1N4128D-1?
JANTX1N4128D-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANTX1N4128D-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 JANTX1N4128D-1?
For technical support, including JANTX1N4128D-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTX1N4128D-1 requirements.
6.How does Aetrix verify that JANTX1N4128D-1 is sourced from the original manufacturer or authorized distributors?
All JANTX1N4128D-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 JANTX1N4128D-1 meets industry standards.
7.What is the process for return or replacement of JANTX1N4128D-1?
All JANTX1N4128D-1 units undergo pre-shipment inspection (PSI). If there is an issue with JANTX1N4128D-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 JANTX1N4128D-1 part is unused and in its original packaging.
Return procedure for JANTX1N4128D-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
JANTX1N4128D-1 Tags
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