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Microchip Technology JANS1N4112-1/TR
- Part No.:
- JANS1N4112-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
JANS1N4112-1/TR.pdf
- Description:
- DIODE ZENER 18V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:7,687
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Product details
Overview
JANS1N4112-1/TR from Microsemi is a 500 mW, 18.0 V Zener voltage regulator diode in DO-35 (DO-204AH) glass package, qualified to JANS level per MIL-PRF-19500/435 for high-reliability aerospace and defense applications. It delivers ±5% Zener tolerance, 100 Ω dynamic impedance at 250 mA test current, and operates across –65 °C to +175 °C junction temperature range.
For engineers reviewing the JANS1N4112-1/TR datasheet, JANS1N4112-1/TR pinout, JANS1N4112-1/TR application, or JANS1N4112-1/TR equivalent, key selection criteria include its radiation-hardened metallurgical bond construction, low noise density (≤1 µV/√Hz below 6.8 V), 0.05 µA max reverse leakage at 13.7 V, and compliance with MIL-STD-750 ESD testing.
Technical Context
This JANS-level Zener diode uses a hermetically sealed axial-leaded glass DO-35 package with tin-lead plating and cathode band polarity marking. Its metallurgical bond ensures stable regulation under thermal cycling and radiation exposure, supporting operation up to 175 °C junction temperature with linear power derating from 500 mW at 25 °C to zero at 175 °C.
The device regulates voltage over broad current ranges (IZK to IZM = 13.7 mA to 40 mA) with a temperature coefficient of +0.090 %/°C and typical capacitance <1.5 pF - critical for precision reference and low-noise analog signal conditioning in harsh-environment systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 18.0 V at 250 mA test current - sets precise DC reference point for voltage-clamp or shunt-regulator circuits. |
| Zener Tolerance | ±5% - defines worst-case output voltage deviation in production units without binning. |
| Power Dissipation | 500 mW at 25 °C lead temperature - limits continuous operating current to ~27.8 mA at 18 V before thermal derating applies. |
| Dynamic Impedance ZZT | 100 Ω at 250 mA - determines output voltage stability under load transients; lower values improve regulation accuracy. |
| Reverse Leakage IR | 0.05 µA max at 13.7 V - ensures minimal parasitic current draw in high-impedance bias networks. |
| Temp Coefficient αVZ | +0.090 %/°C - quantifies drift rate; enables compensation design for wide-temperature-range references. |
| Noise Density ND | ≤1 µV/√Hz - supports ultra-low-noise analog front-ends where reference noise directly impacts ADC SNR. |
Pinout & Package
Package: DO-35 (DO-204AH), axial-leaded, hermetically sealed glass case with cathode band marking. 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 system ground or low-impedance return path; reverse-biased operation requires cathode at higher potential. |
| Cathode | Zener regulation terminal / voltage reference node | Banded end; held at regulated 18.0 V above anode; used as stable reference input for op-amps or feedback networks. |
Key Features
| Feature | Design Value |
|---|---|
| Metallurgical bond construction | Enables JANS qualification and radiation hardness per Microsemi MicroNote 050 - essential for space-grade reliability. |
| Low noise density | ≤1 µV/√Hz below 6.8 V - minimizes contribution to total integrated noise in precision voltage references. |
| MIL-PRF-19500/435 qualification | Qualified to JANS level - guarantees screening, lot traceability, and extended temperature performance for defense/aerospace use. |
| Hermetic glass packaging | Prevents moisture ingress and long-term parameter drift - critical for >10-year mission life in sealed enclosures. |
| ESD robustness | Non-sensitive per MIL-STD-750 Method 1020 - eliminates need for handling precautions during board assembly. |
Applications
| Avionics Power Monitoring | Satellite Payload Reference |
|---|---|
Use Scenario: Real-time monitoring of 28 V DC bus voltage in flight control computers using resistive divider into ADC. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 18.0 V reference for ratiometric scaling of bus measurement. Use Value: Enables ±0.5% bus voltage accuracy over –55 °C to +125 °C ambient due to low tempco and radiation-hardened construction. | Use Scenario: Biasing low-noise op-amps in star tracker analog front-end circuitry aboard LEO satellites. IC Role / Device Role / Timing Role: Low-noise Zener reference supplying clean 18.0 V to op-amp VREF pins for photodiode signal conditioning. Use Value: Achieves <1.2 µV RMS integrated noise (10 Hz–100 kHz) - preserves sub-arcsecond angular resolution in optical sensing. |
| Nuclear Instrumentation | Tactical Radios |
Use Scenario: High-temperature gamma spectrometer front-end requiring stable bias for scintillation detector PMT bases. IC Role / Device Role / Timing Role: Temperature-stable Zener clamp regulating HV supply rails in 150 °C-rated detector modules. Use Value: Maintains regulation within ±1.2% from –65 °C to +175 °C junction - eliminates calibration drift during thermal soak cycles. | Use Scenario: RF power amplifier bias sequencing in manpack radios operating in desert environments (–40 °C to +71 °C). IC Role / Device Role / Timing Role: Precision shunt regulator establishing 18.0 V rail for GaN FET gate drivers and protection comparators. Use Value: Survives 100 krad(Si) TID exposure without parameter shift - ensures uninterrupted comms during nuclear incident response. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4112-1 | Same electrical specs but qualified only to JANTXV level; lacks full JANS screening (e.g., burn-in, radiation testing). | Approved for high-reliability ground systems but not spaceflight or nuclear-hardened platforms. | Select when full JANS qualification is not mandated and cost reduction is prioritized. |
| 1N4112US-TR | Commercial-grade DO-213AA surface-mount variant; same VZ, but 250 mW rating and no MIL qualification. | Suitable for commercial avionics or industrial controls where radiation tolerance and extended temperature are not required. | Choose for automated SMT assembly and non-military BOMs with relaxed reliability requirements. |
Compared with JANS1N4112-1/TR, JANTXV1N4112-1 offers identical regulation performance with reduced screening rigor, while 1N4112US-TR trades hermeticity and power rating for PCB area savings and reflow compatibility - enabling tiered sourcing across military, industrial, and commercial programs.
Availability
JANS1N4112-1/TR is available at Aetrix Electronics and suitable for avionics power monitoring, satellite payload reference, and nuclear instrumentation requiring stable component supply with full traceability and long-lifecycle support.
Supply support for JANS1N4112-1/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) designs high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets.
The JANS1N4112-1/TR belongs to Microsemi's legacy MIL-PRF-19500/435-qualified Zener diode family, engineered specifically for voltage reference stability under extreme temperature, radiation, and mechanical stress.
FAQ
What is the Zener voltage tolerance for JANS1N4112-1/TR?
JANS1N4112-1/TR has a nominal Zener voltage of 18.0 V with a ±5% tolerance, as defined by JEDEC standards and verified per MIL-PRF-19500/435 screening. This tolerance applies across the full qualified temperature range and reflects worst-case deviation in production lots without binning.
Is JANS1N4112-1/TR compatible with lead-free reflow soldering?
JANS1N4112-1/TR features tin-lead plating and is rated for soldering at 260 °C for 10 seconds per MIL-STD-750 Method 2026. While it can withstand lead-free reflow profiles, its termination is not RoHS-compliant; Microsemi does not offer a RoHS version of this JANS-level part.
What is the maximum reverse leakage current for JANS1N4112-1/TR?
The maximum reverse leakage current for JANS1N4112-1/TR is 0.05 µA at 13.7 V (75% of VZ), measured at 25 °C per the Electrical Characteristics table. This value remains stable across the full –65 °C to +175 °C junction temperature range due to metallurgical bond integrity.
Does JANS1N4112-1/TR require derating above 25 °C ambient?
Yes - JANS1N4112-1/TR must be linearly derated from 500 mW starting at 25 °C ambient on a typical FR4 PCB, reaching zero dissipation at 175 °C. Derating follows a slope of –3.57 mW/°C, based on RθJA = 300 °C/W and thermal pad layout per datasheet note.
How is polarity marked on JANS1N4112-1/TR?
JANS1N4112-1/TR uses a cathode band marking on the glass body - the banded end is the cathode and must be held at a higher potential than the anode for Zener regulation. Polarity is confirmed visually and verified per MIL-STD-750 Method 2011.
JANS1N4112-1/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):
- 18 V
- Tolerance:
- ±5%
- 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 (TJ)
- Grade:
- Military
- Qualification:
- MIL-PRF-19500/435
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AH (DO-35)
JANS1N4112-1/TR FAQ
1.How can I place an order for JANS1N4112-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANS1N4112-1/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 JANS1N4112-1/TR reliable?
The price and inventory of JANS1N4112-1/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANS1N4112-1/TR is usually 5 days.
3.What payment methods are accepted for JANS1N4112-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANS1N4112-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JANS1N4112-1/TR?
JANS1N4112-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANS1N4112-1/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 JANS1N4112-1/TR?
For technical support, including JANS1N4112-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANS1N4112-1/TR requirements.
6.How does Aetrix verify that JANS1N4112-1/TR is sourced from the original manufacturer or authorized distributors?
All JANS1N4112-1/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 JANS1N4112-1/TR meets industry standards.
7.What is the process for return or replacement of JANS1N4112-1/TR?
All JANS1N4112-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANS1N4112-1/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 JANS1N4112-1/TR part is unused and in its original packaging.
Return procedure for JANS1N4112-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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