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Microchip Technology JANTX1N4112D-1
- Part No.:
- JANTX1N4112D-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
JANTX1N4112D-1.pdf
- Description:
- DIODE ZENER 18V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:2,094
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Product details
Overview
JANTX1N4112D-1 from Microsemi is a 500 mW, 18.0 V ±1% tolerance metallurgically bonded glass Zener diode in DO-35 (DO-204AH) axial-leaded package, qualified to MIL-PRF-19500/435 JANTX level for high-reliability voltage regulation in aerospace and defense systems.
For engineers reviewing the JANTX1N4112D-1 datasheet, JANTX1N4112D-1 pinout, JANTX1N4112D-1 application, or JANTX1N4112D-1 equivalent, key selection criteria include Zener voltage tolerance (±1%), dynamic impedance (100 Ω @ 250 mA), noise density (1 µV/√Hz), temperature coefficient (+0.090 %/°C), and MIL-qualified thermal derating behavior.
Technical Context
This device operates as a precision shunt voltage regulator with a nominal Zener voltage of 18.0 V at 250 mA test current, exhibiting low dynamic impedance (100 Ω) and minimal capacitance (typ. <2 pF). Its metallurgical bond construction ensures stable junction characteristics under thermal cycling and radiation exposure.
The JANTX1N4112D-1 delivers regulated output across wide current ranges (IZK to IZM = 13.7 mA to 40 mA) and temperature extremes (–65 °C to +175 °C), with linear power derating from 500 mW at 25 °C to zero at 175 °C per MIL-PRF-19500/435 requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 18.0 V ±1% @ 250 mA - enables precise reference generation in analog circuits requiring tight voltage stability. |
| Power Dissipation | 500 mW @ TL = 25 °C - supports continuous regulation in compact, unheatsinked designs with linear derating above 50 °C. |
| Dynamic Impedance ZZT | 100 Ω @ 250 mA - ensures minimal output voltage variation under load transients in feedback and reference applications. |
| Noise Density | 1 µV/√Hz @ 250 mA - critical for low-noise analog references in instrumentation and precision ADC/DAC biasing. |
| Temp. Coefficient αVZ | +0.090 %/°C - provides predictable, monotonic drift over temperature for compensated reference designs. |
| Reverse Leakage IR | 0.05 µA @ 14.4 V - guarantees negligible current draw in standby or high-impedance sensing nodes. |
| Junction Temp. Range | –65 °C to +175 °C - meets extended environmental requirements for avionics, downhole, and space-grade electronics. |
Pinout & Package
DO-35 (DO-204AH) hermetically sealed axial-leaded glass package with cathode indicated by band; leads are tin-lead plated and solderable per MIL-STD-750 method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit common; reverse-biased operation requires cathode at higher potential. |
| Cathode | Zener regulation terminal / voltage reference node | Banded end; supplies stable 18.0 V reference when reverse-biased at IZ ≥ 13.7 mA. |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/435 JANTX qualification | Guarantees screening, testing, and traceability for military/aerospace use with full lot documentation. |
| Metallurgical bond construction | Eliminates interfacial delamination risk under thermal shock and long-term high-temperature operation. |
| 1% Zener voltage tolerance (D suffix) | Reduces calibration overhead in precision reference circuits versus standard 5% commercial variants. |
| Low noise density (1 µV/√Hz) | Enables use in ultra-low-noise analog front-ends without external filtering or post-regulation stages. |
| Hermetic glass sealing | Prevents moisture ingress and parameter drift in humid, corrosive, or vacuum environments. |
Applications
| Aerospace Power Monitoring | Defense System Reference |
|---|---|
Use Scenario: Voltage monitoring in satellite power distribution units where supply rails must be validated against 18 V thresholds. IC Role / Device Role / Timing Role: Shunt reference element providing fault-detection trip point with guaranteed ±1% accuracy across –55 °C to +125 °C. Use Value: Eliminates need for active comparator calibration; JANTX1N4112D-1's radiation-hardened junction ensures stable trip point after total ionizing dose exposure. | Use Scenario: Precision biasing of op-amps and comparators in radar receiver front-ends operating in wide temperature ranges. IC Role / Device Role / Timing Role: Low-noise voltage reference source supplying stable 18 V to analog signal conditioning blocks. Use Value: JANTX1N4112D-1's 1 µV/√Hz noise density prevents SNR degradation in RF IF amplifiers and ADC drivers. |
| Avionics Sensor Interface | Tactical Radio Voltage Regulation |
Use Scenario: Excitation voltage source for strain-gauge bridges in flight control surface position sensors. IC Role / Device Role / Timing Role: Stable excitation reference maintaining bridge balance accuracy despite engine vibration and thermal gradients. Use Value: JANTX1N4112D-1's +0.090 %/°C tempco allows predictable compensation in sensor signal conditioning firmware. | Use Scenario: Local regulation for microcontroller and RF IC power domains in handheld tactical radios exposed to rapid ambient shifts. IC Role / Device Role / Timing Role: Primary shunt regulator establishing clean 18 V rail for mixed-signal SoCs during transmit bursts. Use Value: JANTX1N4112D-1's 100 Ω ZZT minimizes voltage sag during 100 mA transient loads, preserving digital timing margins. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4112US-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 wire-wrap. | Select when board space constraints mandate SMT or automated placement is required. |
| JANTXV1N4112D-1 | Identical electrical specs with enhanced screening (JANTXV level per MIL-PRF-19500/435); lower failure-in-time (FIT) rate. | Required for mission-critical subsystems where burn-in, life test, and lot traceability exceed JANTX requirements. | Select when system-level reliability targets demand extended screening beyond JANTX. |
Compared with JANTX1N4112D-1, the JANTXV variant adds rigorous life testing and tighter parametric limits for ultra-high-reliability deployments, while the 1N4112US-1 offers identical regulation performance in a footprint-optimized SMT form factor-neither is pin-compatible due to differing packages.
Availability
JANTX1N4112D-1 is available at Aetrix Electronics and suitable for aerospace power monitoring, defense system reference design, and avionics sensor interface applications requiring stable component supply with full MIL-spec traceability and long-term obsolescence management.
Supply support for JANTX1N4112D-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 analog and mixed-signal components for aerospace, defense, and industrial markets.
The JANTX1N4112D-1 belongs to Microsemi's legacy MIL-qualified Zener diode family, engineered specifically for precision voltage reference and regulation in harsh-environment electronics where parameter stability, radiation tolerance, and long-term reliability are non-negotiable.
FAQ
What is the Zener voltage tolerance of JANTX1N4112D-1?
JANTX1N4112D-1 has a Zener voltage tolerance of ±1%, denoted by the "D" suffix in its part number. This is confirmed in the Electrical Characteristics table on page 3 of Microsemi's T4-LDS-0245-2 datasheet, where VZ = 18.0 V @ IZT = 250 mA with ±1% limit. The tighter tolerance reduces calibration burden in precision reference circuits compared to standard 5% variants.
Is JANTX1N4112D-1 RoHS compliant?
No, JANTX1N4112D-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 reliability levels. JANTX1N4112D-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 Zener current for JANTX1N4112D-1?
The maximum Zener current (IZM) for JANTX1N4112D-1 is 40 mA, as specified in the Electrical Characteristics table. This value corresponds to the current at which the device dissipates its rated 500 mW at VZ = 18.0 V (P = V × I → 18 V × 40 mA = 720 mW, but derating applies; actual IZM reflects thermal limits at TL = 25 °C with linear derating above 50 °C).
Does JANTX1N4112D-1 have radiation hardness?
Yes, JANTX1N4112D-1 is inherently radiation hard, as documented in Microsemi MicroNote 050. Its metallurgically bonded junction and hermetic glass package provide resistance to total ionizing dose (TID) effects, making it suitable for space and nuclear applications where single-event effects and cumulative dose tolerance are critical design requirements.
What is the thermal resistance junction-to-lead for JANTX1N4112D-1?
The thermal resistance junction-to-lead (RθJL) for JANTX1N4112D-1 is 250 °C/W, measured with 3/8 inch (10 mm) lead length from the body. This value is listed in the Maximum Ratings table on page 1 of the datasheet and informs thermal design when leads are used as heat paths-critical for sustained operation near maximum power dissipation.
JANTX1N4112D-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):
- 18 V
- Tolerance:
- ±1%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 13.7 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)
JANTX1N4112D-1 FAQ
1.How can I place an order for JANTX1N4112D-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTX1N4112D-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 JANTX1N4112D-1 reliable?
The price and inventory of JANTX1N4112D-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTX1N4112D-1 is usually 5 days.
3.What payment methods are accepted for JANTX1N4112D-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANTX1N4112D-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JANTX1N4112D-1?
JANTX1N4112D-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANTX1N4112D-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 JANTX1N4112D-1?
For technical support, including JANTX1N4112D-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTX1N4112D-1 requirements.
6.How does Aetrix verify that JANTX1N4112D-1 is sourced from the original manufacturer or authorized distributors?
All JANTX1N4112D-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 JANTX1N4112D-1 meets industry standards.
7.What is the process for return or replacement of JANTX1N4112D-1?
All JANTX1N4112D-1 units undergo pre-shipment inspection (PSI). If there is an issue with JANTX1N4112D-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 JANTX1N4112D-1 part is unused and in its original packaging.
Return procedure for JANTX1N4112D-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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