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Microchip Technology JANTX1N4618-1
- Part No.:
- JANTX1N4618-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
JANTX1N4618-1.pdf
- Description:
- DIODE ZENER 2.7V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:6,630
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Product details
Overview
JANTX1N4618-1 from Microsemi is a 500 mW, 2.7 V Zener diode in DO-35 glass package, qualified to JANTX level per MIL-PRF-19500/435. It delivers ±5% voltage tolerance, 1500 Ω dynamic impedance at 250 mA test current, and operates across –65 °C to +175 °C for high-reliability voltage regulation in aerospace power conditioning circuits.
For engineers reviewing the JANTX1N4618-1 datasheet, JANTX1N4618-1 pinout, JANTX1N4618-1 application, or JANTX1N4618-1 equivalent, this page provides verified Zener voltage, temperature coefficient, noise density, thermal resistance, and military qualification details critical for radiation-hardened analog reference design and legacy avionics BOM validation.
Technical Context
The JANTX1N4618-1 is a metallurgically bonded, hermetically sealed axial-leaded Zener diode optimized for stable low-voltage regulation under wide temperature and current variation. Its –0.075 %/°C temperature coefficient ensures predictable drift in precision bias networks.
Designed for operation in the sharp knee region of the reverse breakdown curve, it exhibits 0.5 µA maximum reverse leakage at 1.0 V and 90 mA maximum Zener current - enabling use in low-power reference and overvoltage clamp functions where minimal quiescent current matters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 2.7 V ±5% at 250 mA - sets precise low-voltage reference point for analog circuitry |
| Power Dissipation | 500 mW at 25 °C - supports continuous regulation in compact, unheatsinked layouts |
| Dynamic Impedance ZZT | 1500 Ω at 250 mA - defines output impedance in shunt regulator configurations |
| Temp Coefficient αVZ | –0.075 %/°C - enables predictable voltage drift compensation in temperature-critical designs |
| Noise Density ND | 1 µV/√Hz - ensures low-noise performance in precision reference and sensor excitation paths |
| Thermal Resistance RθJL | 250 °C/W (3/8″ lead length) - informs thermal design margin for lead-mounted reliability |
| Reverse Leakage IR | 0.5 µA @ 1.0 V - guarantees minimal standby current in battery-backed systems |
Pinout & Package
DO-35 (DO-204AH) glass axial-leaded package with cathode band marking; leads are tin-lead or RoHS-compliant matte-tin plated, solderable per MIL-STD-750 method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to system ground or lowest potential point in shunt regulator topology |
| Cathode | Zener regulation node | Banded end - connected to input supply; maintains 2.7 V drop relative to anode during reverse conduction |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/435 JANTX qualification | Validated for aerospace and defense applications requiring extended temperature range and lot traceability |
| Metallurgical bond construction | Enables stable long-term Zener voltage stability and reduced parameter drift under thermal cycling |
| Hermetic glass sealing | Prevents moisture ingress and corrosion in high-humidity or sealed chassis environments |
| Low noise density (1 µV/√Hz) | Supports use in low-noise analog references without additional filtering components |
| ESD immunity (MIL-STD-750 Method 1020) | Withstands handling and assembly without protection circuitry in controlled environments |
Applications
| Avionics Power Reference | Satellite Sensor Biasing |
|---|---|
Use Scenario: Provides stable 2.7 V reference for analog-to-digital converters in flight control computers. IC Role / Device Role / Timing Role: Shunt Zener regulator establishing precision voltage rail for ADC reference buffers. Use Value: –0.075 %/°C tempco and 1 µV/√Hz noise ensure <±0.5% reference accuracy over –55 °C to +125 °C operational range. | Use Scenario: Supplies regulated bias voltage to radiation-hardened photodiode front-end amplifiers. IC Role / Device Role / Timing Role: Low-current Zener clamp maintaining fixed reverse bias on optical sensor junctions. Use Value: 0.5 µA leakage at 1.0 V minimizes dark current error while supporting operation down to –65 °C. |
| Missile Guidance Analog Subsystem | Nuclear Instrumentation Signal Conditioning |
Use Scenario: Stabilizes op-amp supply rails in inertial measurement unit (IMU) signal chains exposed to shock and vibration. IC Role / Device Role / Timing Role: Primary voltage reference in analog signal path for gyro and accelerometer interfaces. Use Value: Hermetic DO-35 package and JANTX qualification ensure reliability under mechanical stress and extended storage life. | Use Scenario: Generates calibrated bias for ionization chamber detectors in reactor monitoring systems. IC Role / Device Role / Timing Role: Radiation-hardened Zener reference source for ultra-stable DC bias generation. Use Value: Inherent radiation hardness per MicroNote 050 allows operation in >10 krad(Si) total ionizing dose environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4618US (Microchip) | Same 2.7 V nominal Zener voltage, DO-213AA surface-mount package, 2% tolerance option available | Requires PCB rework for SMT placement; lacks JANTX qualification and MIL-PRF-19500/435 testing | Select when board space is constrained and military qualification is not required |
| JAN1N4618-1 (Microsemi) | Identical electrical specs and DO-35 package, but qualified only to JAN level (lower screening than JANTX) | Approved for less demanding military programs; reduced burn-in and environmental test coverage | Select when full JANTX reliability testing is unnecessary and cost sensitivity is higher |
Compared with JANTX1N4618-1, the 1N4618US offers surface-mount compatibility at the expense of qualification rigor, while JAN1N4618-1 retains identical form-factor and performance but reduces screening depth - both serve as functional alternatives where JANTX-level assurance is not mandated.
Availability
JANTX1N4618-1 is available at Aetrix Electronics and suitable for avionics power reference, satellite sensor biasing, and missile guidance analog subsystems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for JANTX1N4618-1 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 1N4614–1N4627 series was designed specifically for military and space applications requiring MIL-PRF-19500/435 qualification, hermetic packaging, and guaranteed parametric stability over extreme temperature and radiation exposure.
FAQ
What is the Zener voltage tolerance of JANTX1N4618-1?
JANTX1N4618-1 has a nominal Zener voltage of 2.7 V with a ±5% tolerance, as defined by its JEDEC registration and confirmed in the Electrical Characteristics table on page 3 of T4-LDS-0245-2. This tolerance applies under standard test conditions of 25 °C ambient and 250 mA Zener test current (IZT), and is consistent across all JANTX-qualified units in the 1N4614–1N4627 family.
Is JANTX1N4618-1 RoHS compliant?
No, JANTX1N4618-1 is not RoHS compliant. Per the datasheet, RoHS-compliant versions (suffix "e3") are available only for commercial-grade variants (e.g., 1N4618-1e3), not for military-qualified JANTX, JANTXV, or JANS levels. The JANTX1N4618-1 uses traditional tin-lead plating per MIL-STD-750 method 2026.
What is the maximum Zener current rating for JANTX1N4618-1?
The maximum Zener current (IZM) for JANTX1N4618-1 is 90 mA, derived from its 500 mW power rating and 2.7 V Zener voltage (P = V × I → I = 0.5 W / 2.7 V ≈ 185 mA, derated per thermal limits). The datasheet specifies 90 mA as the absolute maximum dc current under rated conditions, consistent with linear derating from 500 mW starting at 50 °C lead temperature.
Does JANTX1N4618-1 have radiation hardness certification?
Yes, JANTX1N4618-1 is inherently radiation hard, as documented in Microsemi MicroNote 050. While not individually tested to specific TID or SEE levels, its metallurgically bonded, hermetically sealed DO-35 construction and process heritage provide proven resilience in total ionizing dose (TID) environments exceeding 10 krad(Si), making it suitable for low-earth orbit and nuclear instrumentation applications.
What is the thermal resistance from junction to lead for JANTX1N4618-1?
JANTX1N4618-1 has a thermal resistance of 250 °C/W from junction to lead when mounted with 3/8″ (10 mm) lead length from the body, as specified in the Maximum Ratings table on page 1 of T4-LDS-0245-2. This value assumes standard mounting on FR4 with 4 mm² copper pads and is used to calculate safe operating temperature margins in lead-mounted configurations.
JANTX1N4618-1 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):
- 2.7 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 1500 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -65°C ~ 175°C
- Grade:
- Military
- Qualification:
- MIL-PRF-19500/435
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AH (DO-35)
JANTX1N4618-1 FAQ
1.How can I place an order for JANTX1N4618-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTX1N4618-1 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 JANTX1N4618-1 reliable?
The price and inventory of JANTX1N4618-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTX1N4618-1 is usually 5 days.
3.What payment methods are accepted for JANTX1N4618-1?
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4.How is shipping managed for JANTX1N4618-1?
JANTX1N4618-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANTX1N4618-1 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 JANTX1N4618-1?
For technical support, including JANTX1N4618-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTX1N4618-1 requirements.
6.How does Aetrix verify that JANTX1N4618-1 is sourced from the original manufacturer or authorized distributors?
All JANTX1N4618-1 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 JANTX1N4618-1 meets industry standards.
7.What is the process for return or replacement of JANTX1N4618-1?
All JANTX1N4618-1 units undergo pre-shipment inspection (PSI). If there is an issue with JANTX1N4618-1, 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 JANTX1N4618-1 part is unused and in its original packaging.
Return procedure for JANTX1N4618-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
JANTX1N4618-1 Tags
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