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Microchip Technology JANS1N4122-1/TR
- Part No.:
- JANS1N4122-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
JANS1N4122-1/TR.pdf
- Description:
- DIODE ZENER 36V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:6,874
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Product details
Overview
JANS1N4122-1/TR from Microsemi is a 36 V, 500 mW metallurgically bonded glass Zener diode in DO-35 package, qualified to JANS level per MIL-PRF-19500/435 for high-reliability aerospace and defense applications. It delivers ±5% Zener voltage tolerance, 200 Ω dynamic impedance at 250 mA test current, and operates across –65 °C to +175 °C junction temperature range.
For engineers reviewing the JANS1N4122-1/TR datasheet, JANS1N4122-1/TR pinout, JANS1N4122-1/TR application, or JANS1N4122-1/TR equivalent, key selection criteria include military-grade reliability qualification, low noise density (≤1 µV/√Hz), thermal resistance of 250 °C/W (junction-to-lead), and axial-leaded DO-35 mechanical compatibility with legacy through-hole designs.
Technical Context
This device functions as a precision voltage reference and regulation element in analog power supply rails, bias networks, and overvoltage protection circuits where radiation hardness and long-term stability under thermal stress are required. Its metallurgical bond construction ensures stable Zener voltage under high-temperature operation and mitigates parameter drift in harsh environments.
The JANS1N4122-1/TR exhibits a positive temperature coefficient of +0.095 %/°C, enabling predictable voltage drift compensation in multi-device reference stacks. Its 0.5 W power rating is linearly derated from 50 °C ambient, reaching zero dissipation at 175 °C - consistent with MIL-PRF-19500/435 thermal performance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 36 V ±5% at 250 mA - defines stable regulation point for reference and clamp circuits |
| Power Dissipation | 500 mW @ TL = 25 °C - supports continuous operation in compact, unheatsinked layouts |
| Dynamic Impedance ZZT | 200 Ω @ IZT = 250 mA - determines output voltage ripple rejection under load transients |
| Reverse Leakage IR | ≤10 nA @ VR = 28.8 V - ensures minimal quiescent current in high-impedance bias networks |
| Temp Coefficient αVZ | +0.095 %/°C - enables predictable voltage shift for temperature-compensated references |
| Noise Density ND | ≤1 µV/√Hz - critical for low-noise analog signal conditioning and precision ADC references |
| Junction Temp Range | –65 °C to +175 °C - validated for extended operation in space, avionics, and nuclear systems |
Pinout & Package
DO-35 (DO-204AH) hermetically sealed axial-leaded glass package with cathode band marking. Tin-lead plating on leads, solderable per MIL-STD-750 Method 2026. Weight ≈ 0.2 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node during Zener operation; used for forward-bias testing |
| Cathode (banded end) | Zener regulation terminal | Connected to higher-potential node; reverse-biased to maintain 36 V reference voltage |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/435 JANS qualification | Validated for flight-critical systems requiring highest reliability screening and lot traceability |
| Metallurgical bond construction | Eliminates interfacial delamination risk under thermal cycling and mechanical shock |
| Low noise density (≤1 µV/√Hz) | Enables use in ultra-low-noise reference chains without external filtering |
| Radiation hardness | Inherently tolerant to total ionizing dose (TID) per Microsemi MicroNote 050 |
| Hermetic glass sealing | Prevents moisture ingress and parameter degradation over 20+ year service life |
Applications
| Avionics Power Reference | Satellite Voltage Clamp |
|---|---|
Use Scenario: Stable 36 V reference for analog-to-digital converter (ADC) biasing in inertial measurement units (IMUs). IC Role / Device Role / Timing Role: Precision Zener reference providing fixed voltage to ADC reference input and op-amp bias networks. Use Value: Maintains <±0.5% reference accuracy over –55 °C to +125 °C operating range due to JANS-level thermal validation and +0.095 %/°C TC. | Use Scenario: Overvoltage protection for 28 V bus in LEO satellite power distribution units. IC Role / Device Role / Timing Role: Shunt regulator clamping transient surges above 36 V to protect downstream DC-DC converters. Use Value: Withstands 40 V transients for >100 ms without degradation, leveraging 500 mW power rating and hermetic DO-35 package. |
| Nuclear Instrumentation Bias | Missile Guidance Sensor Supply |
Use Scenario: High-stability bias source for radiation detector preamplifiers in reactor monitoring systems. IC Role / Device Role / Timing Role: Low-noise Zener reference supplying regulated voltage to FET-input op-amps in charge-sensitive amplifiers. Use Value: ≤1 µV/√Hz noise density prevents signal-to-noise degradation in sub-picoamp current measurements. | Use Scenario: Voltage regulation for MEMS gyroscope and accelerometer signal conditioning in tactical missile guidance electronics. IC Role / Device Role / Timing Role: Primary Zener reference in isolated analog supply rail feeding sensor interface ICs. Use Value: JANS qualification ensures operation after 100 krad(Si) TID exposure and survivability under 30 g shock per MIL-STD-883. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4122-1 | Same electrical specs; qualified to JANTXV level (lower screening rigor than JANS) | Approved for non-flight-critical avionics subsystems with reduced reliability requirements | Select when full JANS qualification is not mandated and cost sensitivity is higher |
| 1N4122US-TR | Surface-mount DO-213AA package; identical Zener voltage and power rating | Used in space-constrained PCBs where axial-leaded DO-35 footprint is unavailable | Select when automated SMT assembly is required and thermal resistance budget allows RθJA = 300 °C/W |
Compared with JANTXV1N4122-1 and 1N4122US-TR, the JANS1N4122-1/TR provides the highest reliability assurance for mission-critical systems, with full JANS screening including burn-in, thermal shock, and radiation testing - essential where failure modes carry catastrophic risk.
Availability
JANS1N4122-1/TR is available at Aetrix Electronics and suitable for avionics power reference, satellite voltage clamp, and nuclear instrumentation bias applications requiring stable component supply across extended product lifecycles.
Supply support for JANS1N4122-1/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 components.
The JANS1N4122-1/TR belongs to Microsemi's MIL-PRF-19500/435 qualified Zener diode family, engineered for voltage regulation and reference stability in extreme-environment electronics where long-term parametric consistency is non-negotiable.
FAQ
What is the Zener voltage tolerance for JANS1N4122-1/TR?
The JANS1N4122-1/TR has a nominal Zener voltage of 36 V with a ±5% tolerance, as specified in the Electrical Characteristics table on page 3 of the T4-LDS-0245-2 datasheet. This tolerance applies at 25 °C with 250 mA test current and reflects the standard JEDEC specification for the 1N4099–1N4135 series.
Is JANS1N4122-1/TR RoHS compliant?
No, JANS1N4122-1/TR is not RoHS compliant. Per the datasheet, RoHS-compliant versions (suffix "e3") are available only for commercial-grade parts; JANS-level devices retain tin-lead plating to meet MIL-STD-750 solderability and reliability requirements for high-reliability applications.
What is the maximum Zener current IZM for JANS1N4122-1/TR?
The maximum Zener current IZM for JANS1N4122-1/TR is 40 mA, as listed in the Electrical Characteristics table. This value corresponds to the current at which the device dissipates its rated 500 mW at 36 V, and must be applied with appropriate thermal derating above 50 °C lead temperature.
How is polarity marked on JANS1N4122-1/TR?
JANS1N4122-1/TR uses a cathode band to indicate polarity: the banded end is the cathode and must be connected to the higher-potential node during Zener regulation. The anode is the unbanded lead. This marking follows JEDEC DO-35 conventions and is verified in the Mechanical and Packaging section of the datasheet.
What is the thermal resistance junction-to-lead (RθJL) for JANS1N4122-1/TR?
The thermal resistance junction-to-lead (RθJL) for JANS1N4122-1/TR is 250 °C/W, measured with 3/8 inch (10 mm) lead length from the package body. This value is specified in the Maximum Ratings table and is critical for calculating junction temperature rise under sustained power dissipation.
JANS1N4122-1/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):
- 36 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 200 Ohms
- Current - Reverse Leakage @ Vr:
- 10 nA @ 27.4 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)
JANS1N4122-1/TR FAQ
1.How can I place an order for JANS1N4122-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANS1N4122-1/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 JANS1N4122-1/TR reliable?
The price and inventory of JANS1N4122-1/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANS1N4122-1/TR is usually 5 days.
3.What payment methods are accepted for JANS1N4122-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANS1N4122-1/TR transactions.
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4.How is shipping managed for JANS1N4122-1/TR?
JANS1N4122-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANS1N4122-1/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 JANS1N4122-1/TR?
For technical support, including JANS1N4122-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANS1N4122-1/TR requirements.
6.How does Aetrix verify that JANS1N4122-1/TR is sourced from the original manufacturer or authorized distributors?
All JANS1N4122-1/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 JANS1N4122-1/TR meets industry standards.
7.What is the process for return or replacement of JANS1N4122-1/TR?
All JANS1N4122-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANS1N4122-1/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 JANS1N4122-1/TR part is unused and in its original packaging.
Return procedure for JANS1N4122-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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