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Microchip Technology JANS1N4112D-1/TR
- Part No.:
- JANS1N4112D-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
JANS1N4112D-1/TR.pdf
- Description:
- DIODE ZENER 18V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:9,739
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Product details
Overview
JANS1N4112D-1/TR from Microsemi is a 18.0 V, 1% tolerance, 500 mW metallurgically bonded glass Zener diode in DO-35 (DO-204AH) axial package, qualified to JANS level per MIL-PRF-19500/435 for high-reliability aerospace and defense applications. It delivers stable voltage regulation at 250 mA test current with 100 Ω dynamic impedance, <0.05 µA reverse leakage at 14.4 V, and +0.090 %/°C temperature coefficient.
For engineers reviewing the JANS1N4112D-1/TR datasheet, JANS1N4112D-1/TR pinout, JANS1N4112D-1/TR application, or JANS1N4112D-1/TR equivalent, key selection criteria include Zener voltage tolerance (1%), radiation hardness, hermetic glass packaging, MIL-qualified reliability level, and noise density performance in precision reference circuits.
Technical Context
This device operates as a two-terminal voltage reference in reverse-biased breakdown mode, with cathode band marking polarity. Its metallurgical bond construction ensures low thermal resistance (RθJL = 250 °C/W) and stable long-term Zener voltage drift under thermal cycling and radiation exposure.
The JANS1N4112D-1/TR exhibits a positive temperature coefficient (+0.090 %/°C), making it suitable for temperature-compensated reference designs when paired with negative-TC components. Its 100 Ω dynamic impedance at 250 mA and <1 µV/√Hz noise density above 1 kHz support low-noise analog signal conditioning and precision power supply feedback loops.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 18.0 V ±1% at 250 mA - enables precise 18 V rail regulation with minimal calibration overhead |
| Power Dissipation | 500 mW at 25 °C lead temperature - supports continuous operation in compact, unheatsinked layouts |
| Dynamic Impedance ZZT | 100 Ω max at 250 mA - ensures tight regulation under load transients up to ±10 mA change |
| Reverse Leakage IR | <0.05 µA at 14.4 V - minimizes error current in high-impedance reference divider networks |
| Temp. Coefficient αVZ | +0.090 %/°C - allows predictable drift compensation in wide-temperature-range systems |
| Noise Density ND | <1 µV/√Hz (typ.) above 1 kHz - critical for low-noise instrumentation amplifier references |
| Junction Temp. Range | –65 to +175 °C - validated for extended operation in space-grade and downhole electronics |
Pinout & Package
Hermetically sealed axial-leaded DO-35 (DO-204AH) glass package with tin-lead plating; cathode indicated by single black band; weight ≈ 0.2 g; lead length 25.4–38.1 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to system ground or common return; establishes reference potential for regulation |
| Cathode (banded end) | Zener output terminal | Provides regulated 18.0 V output when reverse-biased; must be held positive relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/435 JANS qualification | Validated for Class S (space) and Class H (high reliability) applications with full lot traceability and screening |
| Metallurgical bond construction | Eliminates interfacial delamination risk under thermal shock and vibration, ensuring long-term parameter stability |
| 1% Zener voltage tolerance | Reduces need for post-assembly trimming in precision voltage references and ADC/DAC bias networks |
| Radiation hardness | Inherently resistant to total ionizing dose (TID) per Microsemi MicroNote 050 - no derating required up to 100 krad(Si) |
| Low capacitance | Typical ~2 pF (per Figure 3) - preserves high-frequency stability in RF detector and fast-switching regulator feedback paths |
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 + comparator. IC Role / Device Role / Timing Role: Precision 18 V Zener reference for comparator threshold setting. Use Value: 1% tolerance and +0.090 %/°C TC enable ±0.5% total error over –55 to +125 °C without calibration. | Use Scenario: Biasing photodiode preamplifiers in star tracker optical sensors aboard LEO satellites. IC Role / Device Role / Timing Role: Low-noise, radiation-hardened voltage reference for op-amp offset nulling. Use Value: <1 µV/√Hz noise density and inherent TID hardness ensure SNR stability after 5-year orbital exposure. |
| Nuclear Instrumentation | Downhole Telemetry |
Use Scenario: High-temperature gamma spectrometer front-end requiring stable bias for scintillation detector PMTs. IC Role / Device Role / Timing Role: Primary 18 V reference for charge-sensitive amplifier gain-setting network. Use Value: Operation up to +175 °C junction temperature and –65 °C storage enable deployment in reactor containment zones. | Use Scenario: Pressure/temperature sensor module in oil well logging tools operating at 175 °C ambient. IC Role / Device Role / Timing Role: Regulated supply reference for 24-bit sigma-delta ADC reference buffer. Use Value: Hermetic DO-35 glass package prevents moisture ingress and parameter shift during 200+ hour thermal soak tests. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4112D-1 | Same electrical specs but qualified only to JANTXV level; lower screening severity and no radiation hardness validation | Suitable for non-space military platforms where TID exposure is negligible | Select when cost sensitivity outweighs space qualification requirements |
| 1N4112UR-1 | Same 18 V/1% spec in DO-213AA surface-mount package; RθJA = 400 °C/W vs. 300 °C/W for DO-35 | Preferred for automated SMT assembly; requires thermal pad design for equivalent power handling | Choose for PCB space-constrained designs accepting higher thermal resistance |
Compared with JANTXV1N4112D-1, the JANS1N4112D-1/TR adds full radiation hardness assurance and extended burn-in; versus 1N4112UR-1, it provides superior thermal dissipation and legacy through-hole compatibility for repairable avionics line-replaceable units.
Availability
JANS1N4112D-1/TR is available at Aetrix Electronics and suitable for avionics power monitoring, satellite payload reference, and nuclear instrumentation requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for JANS1N4112D-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) is a U.S.-based semiconductor company specializing in high-reliability, radiation-hardened, and aerospace-grade analog and mixed-signal components.
The JANS1N4112D-1/TR belongs to Microsemi's MIL-qualified Zener diode family designed specifically for precision voltage reference and regulation in mission-critical defense, space, and nuclear systems.
FAQ
What is the Zener voltage tolerance and test condition for JANS1N4112D-1/TR?
JANS1N4112D-1/TR has a nominal Zener voltage of 18.0 V with ±1% tolerance, measured at 250 mA Zener test current (IZT) and 25 °C ambient temperature under thermal equilibrium conditions. This tolerance is achieved via post-trim screening and is guaranteed per MIL-PRF-19500/435 JANS level requirements.
Is JANS1N4112D-1/TR suitable for space applications?
Yes, JANS1N4112D-1/TR is qualified to JANS level per MIL-PRF-19500/435 and inherently radiation-hardened per Microsemi MicroNote 050, supporting total ionizing dose (TID) up to 100 krad(Si) without parameter degradation. Its hermetic DO-35 package and metallurgical bond construction meet Class S space application requirements.
What is the maximum reverse leakage current specification for JANS1N4112D-1/TR?
JANS1N4112D-1/TR specifies maximum reverse leakage current (IR) of 0.05 µA at 14.4 V (80% of VZ). This ultra-low leakage ensures minimal error contribution in high-impedance reference divider networks and maintains accuracy in battery-powered or low-power sensing circuits.
Does JANS1N4112D-1/TR have a specified noise density?
Yes, JANS1N4112D-1/TR exhibits typical noise density <1 µV/√Hz above 1 kHz, measured per Figure 1 circuit with 1–3 kHz bandpass filtering at 250 mA IZT. This low noise performance is critical for precision analog circuits including instrumentation amplifiers and high-resolution ADC references.
What packaging and marking details apply to JANS1N4112D-1/TR?
JANS1N4112D-1/TR uses a hermetically sealed DO-35 (DO-204AH) axial glass package with cathode indicated by a single black band. It is supplied in tape-and-reel format (EIA-296 compliant) with "TR" suffix, marked with full part number "JANS1N4112D-1" on the body.
JANS1N4112D-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:
- ±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 (TJ)
- Grade:
- Military
- Qualification:
- MIL-PRF-19500/435
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AH (DO-35)
JANS1N4112D-1/TR FAQ
1.How can I place an order for JANS1N4112D-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANS1N4112D-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 JANS1N4112D-1/TR reliable?
The price and inventory of JANS1N4112D-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 JANS1N4112D-1/TR is usually 5 days.
3.What payment methods are accepted for JANS1N4112D-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANS1N4112D-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JANS1N4112D-1/TR?
JANS1N4112D-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANS1N4112D-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 JANS1N4112D-1/TR?
For technical support, including JANS1N4112D-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANS1N4112D-1/TR requirements.
6.How does Aetrix verify that JANS1N4112D-1/TR is sourced from the original manufacturer or authorized distributors?
All JANS1N4112D-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 JANS1N4112D-1/TR meets industry standards.
7.What is the process for return or replacement of JANS1N4112D-1/TR?
All JANS1N4112D-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANS1N4112D-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 JANS1N4112D-1/TR part is unused and in its original packaging.
Return procedure for JANS1N4112D-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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