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Microchip Technology JANTX1N4121C-1
- Part No.:
- JANTX1N4121C-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
JANTX1N4121C-1.pdf
- Description:
- DIODE ZENER 33V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:7,841
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Product details
Overview
JANTX1N4121C-1 from Microsemi is a 500 mW, 33 V Zener diode with ±2% voltage tolerance, metallurgically bonded glass DO-35 package, qualified to MIL-PRF-19500/435 JANTX level for high-reliability voltage regulation in aerospace and defense power supplies.
For engineers reviewing the JANTX1N4121C-1 datasheet, JANTX1N4121C-1 pinout, JANTX1N4121C-1 application, or JANTX1N4121C-1 equivalent, key selection criteria include Zener voltage accuracy (±2%), low noise density (≤40 µV/√Hz), thermal resistance (250 °C/W junction-to-lead), and military-grade reliability qualification under MIL-PRF-19500/435.
Technical Context
This device operates as a precision shunt voltage regulator in reverse-biased breakdown mode, with nominal Zener voltage of 33.0 V at 250 mA test current and dynamic impedance of 200 Ω at IZT. Its metallurgical bond construction ensures stable regulation across temperature extremes from –65 °C to +175 °C.
It exhibits a positive temperature coefficient of +0.095 %/°C and maximum reverse leakage current of 10 µA at 25.1 V, supporting stable reference generation in analog circuits where low drift and low noise are critical-especially in regulated DC-DC converter feedback paths and sensor excitation supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 33.0 V ±2% at 250 mA - defines precise regulation point for feedback networks requiring tight voltage references. |
| Power Dissipation | 500 mW @ TC = 25 °C - supports continuous operation in compact axial-leaded layouts with linear derating above 50 °C. |
| Zener Impedance ZZT | 200 Ω @ 250 mA - ensures minimal output voltage variation under load transients in precision reference applications. |
| Noise Density ND | ≤40 µV/√Hz - enables use in low-noise analog signal chains including instrumentation amplifiers and ADC references. |
| Temp Coefficient αVZ | +0.095 %/°C - provides predictable, monotonic drift behavior for temperature-compensated designs. |
| Reverse Leakage IR | 10 µA @ 25.1 V - guarantees low quiescent current draw in standby or battery-backed systems. |
| Junction Temp Range | –65 °C to +175 °C - meets extended environmental requirements for avionics, downhole, and space-qualified electronics. |
Pinout & Package
DO-35 (DO-204AH) axial-leaded hermetically sealed glass package. Cathode indicated by band; operated with banded end positive relative to anode for Zener regulation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to system ground or common return path; establishes reference potential for regulation. |
| Cathode | Zener output node | Provides regulated 33 V output when reverse-biased; connects to feedback input of voltage controller or load. |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/435 JANTX qualification | Validated reliability for mission-critical aerospace and defense hardware with full traceability and screening. |
| Metallurgical bond construction | Eliminates interfacial delamination risk under thermal cycling, ensuring long-term parameter stability. |
| Low noise density ≤40 µV/√Hz | Reduces voltage reference uncertainty in high-resolution data acquisition systems and precision DACs. |
| Hermetic glass DO-35 package | Prevents moisture ingress and corrosion in harsh environments including high-humidity and salt fog conditions. |
| Non-ESD-sensitive per MIL-STD-750 Method 1020 | Enables safe handling without special ESD controls during manual assembly or field repair. |
Applications
| Aerospace Power Regulation | Defense System Reference |
|---|---|
Use Scenario: Regulating auxiliary 33 V rail in satellite power management units with wide temperature swings and radiation exposure. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable feedback to DC-DC controller ICs. Use Value: Maintains ±2% regulation over –65 °C to +175 °C and withstands total ionizing dose up to 100 krad(Si). | Use Scenario: Precision voltage reference in radar receiver front-end biasing circuits operating in mobile military platforms. IC Role / Device Role / Timing Role: Zener-based reference source for RF amplifier bias networks and analog-to-digital converter references. Use Value: Delivers ≤40 µV/√Hz noise floor and <10 µA leakage at 25.1 V, minimizing signal distortion and quantization error. |
| Avionics Sensor Excitation | Industrial Control Loop Reference |
Use Scenario: Supplying stable excitation voltage to strain gauge bridges in flight control surface position sensors. IC Role / Device Role / Timing Role: Low-drift voltage reference enabling sub-millivolt measurement resolution. Use Value: +0.095 %/°C tempco allows predictable compensation in closed-loop calibration algorithms. | Use Scenario: Providing regulated reference for 4–20 mA transmitter loop-powered sensors in oil & gas process monitoring. IC Role / Device Role / Timing Role: Primary shunt regulator establishing isolated 33 V reference in intrinsically safe barrier designs. Use Value: Hermetic DO-35 package resists chemical corrosion and humidity-induced parameter shift in Class I Div 1 environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4121US-1 | Same electrical specs but in DO-213AA surface-mount package; no axial leads. | Used where board space is constrained and reflow soldering is required instead of through-hole mounting. | Select when transitioning from through-hole to SMT assembly or when lead-free RoHS compliance is mandatory (commercial grade only). |
| JANTXV1N4121C-1 | Identical electrical and mechanical specs but qualified to higher JANTXV reliability level with additional screening. | Required for flight-critical subsystems where burn-in, temperature cycling, and lot acceptance testing are mandated. | Select when design assurance level exceeds JANTX, such as in manned spacecraft or missile guidance electronics. |
Compared with JANTX1N4121C-1, the 1N4121US-1 offers identical regulation performance in a space-saving SMT form factor, while JANTXV1N4121C-1 adds enhanced screening for ultra-high-reliability deployments-neither is pin-compatible due to differing packages or qualification scope.
Availability
JANTX1N4121C-1 is available at Aetrix Electronics and suitable for aerospace power regulation, defense system reference, and avionics sensor excitation requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for JANTX1N4121C-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 JANTX1N4121C-1 belongs to Microsemi's legacy MIL-qualified Zener diode family designed specifically for precision voltage regulation in mission-critical systems where parameter stability, radiation hardness, and long-term reliability are non-negotiable.
FAQ
What is the Zener voltage tolerance of JANTX1N4121C-1?
JANTX1N4121C-1 has a Zener voltage tolerance of ±2%, indicated by the "C" suffix in its part number per Microsemi's nomenclature. This corresponds to a nominal 33.0 V Zener voltage ranging from 32.34 V to 33.66 V at 250 mA test current and 25 °C ambient temperature, enabling tighter regulation than standard ±5% variants.
Is JANTX1N4121C-1 RoHS compliant?
No, JANTX1N4121C-1 is not RoHS compliant. Per Microsemi documentation, RoHS-compliant versions (e.g., with "e3" suffix) are available only for commercial-grade parts-not for JAN, JANTX, JANTXV, or JANS qualified devices like JANTX1N4121C-1, which retain tin-lead plating to meet MIL-PRF-19500/435 requirements.
What is the maximum power dissipation of JANTX1N4121C-1 at 75 °C ambient?
At 75 °C ambient, JANTX1N4121C-1's rated average power dissipation is linearly derated from 500 mW starting at 50 °C, reaching zero at 175 °C. Using the specified derating slope of 5 mW/°C, its maximum allowable power at 75 °C is 375 mW-critical for thermal design in enclosed avionics enclosures.
Does JANTX1N4121C-1 have a specified noise density value?
Yes, JANTX1N4121C-1 has a maximum noise density of ≤40 µV/√Hz, consistent with the 6.8 V and higher devices in the 1N4099–1N4135 series. This value is measured at 250 mA Zener test current using a 1 kHz–3 kHz bandpass filter and directly supports low-noise analog reference applications.
What does the "-1" suffix mean in JANTX1N4121C-1?
The "-1" suffix in JANTX1N4121C-1 denotes Microsemi's internal revision level for the device's qualification and manufacturing process, indicating compliance with the T4-LDS-0245-2 specification revision dated May 31, 2013. It does not reflect a functional or electrical change from earlier revisions of the same part number.
JANTX1N4121C-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):
- 33 V
- Tolerance:
- ±2%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 200 Ohms
- Current - Reverse Leakage @ Vr:
- 10 nA @ 25.1 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)
JANTX1N4121C-1 FAQ
1.How can I place an order for JANTX1N4121C-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTX1N4121C-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 JANTX1N4121C-1 reliable?
The price and inventory of JANTX1N4121C-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTX1N4121C-1 is usually 5 days.
3.What payment methods are accepted for JANTX1N4121C-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANTX1N4121C-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JANTX1N4121C-1?
JANTX1N4121C-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANTX1N4121C-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 JANTX1N4121C-1?
For technical support, including JANTX1N4121C-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTX1N4121C-1 requirements.
6.How does Aetrix verify that JANTX1N4121C-1 is sourced from the original manufacturer or authorized distributors?
All JANTX1N4121C-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 JANTX1N4121C-1 meets industry standards.
7.What is the process for return or replacement of JANTX1N4121C-1?
All JANTX1N4121C-1 units undergo pre-shipment inspection (PSI). If there is an issue with JANTX1N4121C-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 JANTX1N4121C-1 part is unused and in its original packaging.
Return procedure for JANTX1N4121C-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
JANTX1N4121C-1 Tags
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Diodes Incorporated
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