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Microchip Technology JANTX1N4121D-1/TR
- Part No.:
- JANTX1N4121D-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
JANTX1N4121D-1/TR.pdf
- Description:
- DIODE ZENER 33V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:6,235
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Product details
Overview
JANTX1N4121D-1/TR from Microsemi is a 33 V, 1% tolerance, 500 mW metallurgically bonded glass Zener diode in DO-35 package, qualified to JANTX level per MIL-PRF-19500/435 for high-reliability voltage regulation in aerospace and defense power supplies.
For engineers reviewing the JANTX1N4121D-1/TR datasheet, JANTX1N4121D-1/TR pinout, JANTX1N4121D-1/TR application, or JANTX1N4121D-1/TR equivalent, key selection criteria include Zener voltage tolerance (±1%), low noise density (≤40 µV/√Hz), radiation hardness, and military-grade thermal derating behavior up to +175 °C junction temperature.
Technical Context
This device operates as a precision shunt voltage regulator with a nominal Zener voltage of 33.0 V at 250 mA test current, exhibiting a dynamic impedance of 200 Ω and a temperature coefficient of +0.095 %/°C. Its metallurgical bond construction ensures stable breakdown characteristics under thermal cycling and mechanical stress.
Designed for operation in the reverse-biased breakdown region, it delivers regulated voltage across wide current ranges (IZK to IZM = 25.1 mA to 40 mA) while maintaining low leakage (IR ≤ 0.01 µA at VR = 25.1 V) and minimal capacitance (<2 pF typical at 33 V), critical for low-noise analog references and ESD-robust bias networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 33.0 V ±1% at IZT = 250 mA - enables precise 33 V rail stabilization with tight tolerance for reference-sensitive circuits. |
| Power Dissipation | 500 mW at TL = 25 °C, linearly derated to zero at 175 °C - supports sustained operation in high-temp avionics enclosures with proper lead heatsinking. |
| Zener Impedance ZZT | 200 Ω at IZT = 250 mA - ensures minimal output voltage variation under load transients in feedback loops. |
| Noise Density | ≤40 µV/√Hz (typical for ≥6.8 V parts) - suitable for low-noise voltage references in precision instrumentation front-ends. |
| Reverse Leakage IR | ≤0.01 µA at VR = 25.1 V - guarantees negligible current draw in standby bias networks. |
| Temp Coefficient αVZ | +0.095 %/°C - predictable positive drift allows compensation in temperature-stable reference designs. |
| Junction Temp Range | –65 °C to +175 °C - validated for extended-range operation in space-grade and engine-mounted electronics. |
Pinout & Package
DO-35 (DO-204AH) axial-leaded hermetically sealed glass package with cathode indicated by band; leads are tin-lead or RoHS-compliant matte-tin plated and solderable per MIL-STD-750 method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Ground/reference node in shunt regulator configuration | Connected to system ground or lower-potential rail; forms return path for Zener current. |
| Cathode | Regulated output node | Banded end; connected to input supply via series resistor and to load; maintains 33 V relative to anode. |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/435 JANTX qualification | Validated reliability for aerospace and defense programs requiring traceable screening and lot-level documentation. |
| Metallurgical bond construction | Eliminates interfacial delamination risk under thermal shock, ensuring long-term parameter stability in cyclic environments. |
| 1% Zener voltage tolerance (suffix D) | Reduces need for post-production trimming in precision reference circuits, lowering calibration cost and time. |
| Radiation hardness (per MicroNote 050) | Enables use in low-earth orbit and nuclear-hardened systems without additional shielding or derating. |
| Non-ESD-sensitive (MIL-STD-750 method 1020) | Withstands handling without special grounding protocols, simplifying assembly in non-classified production lines. |
Applications
| Avionics Power Reference | Spacecraft Bias Network |
|---|---|
Use Scenario: Providing stable 33 V reference for ADC drivers and op-amp biasing in flight control computers. IC Role / Device Role / Timing Role: Shunt voltage regulator establishing precision analog reference point. Use Value: Tight 1% tolerance and +0.095 %/°C TC enable <±0.5% total error over –55 °C to +125 °C operating range. | Use Scenario: Generating stable bias voltages for CMOS imagers and RF front-end LNAs on CubeSats. IC Role / Device Role / Timing Role: Radiation-tolerant Zener reference in unshielded low-mass payloads. Use Value: Inherent radiation hardness eliminates need for redundant regulators or shielding mass. |
| Defense Radar Bias Supply | Nuclear Instrumentation Reference |
Use Scenario: Regulating gate bias for GaN HEMT drivers in pulsed radar transmitters. IC Role / Device Role / Timing Role: High-temp-stable shunt regulator in compact, conduction-cooled modules. Use Value: Operation up to +175 °C junction temperature supports integration near high-power RF stages. | Use Scenario: Serving as primary voltage reference in neutron detection pulse-height analyzers. IC Role / Device Role / Timing Role: Low-noise, low-drift Zener element in charge-integration signal chains. Use Value: ≤40 µV/√Hz noise density preserves signal-to-noise ratio in sub-mV pulse measurements. |
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. | Required for automated SMT assembly; unsuitable for through-hole prototyping or high-vibration mechanical retention. | Select when board space is constrained and reflow compatibility is mandatory. |
| JANTXV1N4121D-1 | Identical electrical and mechanical specs, but qualified to higher JANTXV reliability level with extended screening. | Needed for mission-critical subsystems where burn-in, life test, and lot acceptance testing are contractually required. | Select when program specifications mandate JANTXV-level screening beyond JANTX. |
Compared with JANTX1N4121D-1/TR, the 1N4121US-1 offers identical regulation performance in a surface-mount form factor ideal for volume production, while JANTXV1N4121D-1 provides enhanced reliability assurance for safety-critical deployments-neither is pin-compatible due to differing packages or screening levels.
Availability
JANTX1N4121D-1/TR is available at Aetrix Electronics and suitable for avionics power reference, spacecraft bias network, and defense radar bias supply applications requiring stable component supply, full traceability, and MIL-spec compliance.
Supply support for JANTX1N4121D-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 analog and mixed-signal components for aerospace, defense, and industrial markets.
The 1N4099–1N4135 series was designed specifically to meet MIL-PRF-19500/435 requirements for ruggedized, low-noise Zener regulation in harsh-environment electronics.
FAQ
What does the "D" suffix in JANTX1N4121D-1/TR indicate?
The "D" suffix in JANTX1N4121D-1/TR specifies ±1% Zener voltage tolerance at 25 °C, verified per MIL-PRF-19500/435 test methods. This tighter tolerance distinguishes it from standard 5% (blank suffix) or 2% (C suffix) variants in the same family, directly impacting reference accuracy in precision analog circuits using JANTX1N4121D-1/TR.
Is JANTX1N4121D-1/TR compatible with lead-free soldering processes?
JANTX1N4121D-1/TR features tin-lead plating per standard configuration and is rated for 260 °C solder temperature for 10 seconds. RoHS-compliant versions (e3 suffix) are available for commercial grade only; the JANTX1N4121D-1/TR itself is not RoHS-compliant and requires SnPb soldering profiles to ensure reliable joint formation and avoid intermetallic degradation.
How is the 500 mW power rating of JANTX1N4121D-1/TR thermally derated?
JANTX1N4121D-1/TR's 500 mW rating linearly derates to zero at +175 °C junction temperature, beginning at +50 °C lead temperature. On a typical FR4 PCB with 4 mm² copper pads, derating starts at +25 °C ambient. Full power is usable only with adequate heatsinking-designers must calculate actual dissipation using IZ × VZ and verify thermal margin for JANTX1N4121D-1/TR in each layout.
Does JANTX1N4121D-1/TR require external capacitors for stability?
No, JANTX1N4121D-1/TR is a passive two-terminal Zener diode and does not require external capacitors for basic shunt regulation. However, a small bypass capacitor (e.g., 100 nF ceramic) is recommended at the cathode to suppress high-frequency noise and improve transient response-this practice is standard for all Zener-based references including JANTX1N4121D-1/TR.
What is the maximum reverse leakage current for JANTX1N4121D-1/TR at 25.1 V?
The maximum reverse leakage current (IR) for JANTX1N4121D-1/TR is 0.01 µA at VR = 25.1 V and 25 °C, as specified in the Electrical Characteristics table. This ultra-low leakage ensures minimal parasitic current draw in high-impedance bias networks and preserves accuracy in low-power JANTX1N4121D-1/TR reference designs.
JANTX1N4121D-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):
- 33 V
- Tolerance:
- ±1%
- 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)
JANTX1N4121D-1/TR FAQ
1.How can I place an order for JANTX1N4121D-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTX1N4121D-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 JANTX1N4121D-1/TR reliable?
The price and inventory of JANTX1N4121D-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 JANTX1N4121D-1/TR is usually 5 days.
3.What payment methods are accepted for JANTX1N4121D-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANTX1N4121D-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JANTX1N4121D-1/TR?
JANTX1N4121D-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANTX1N4121D-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 JANTX1N4121D-1/TR?
For technical support, including JANTX1N4121D-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTX1N4121D-1/TR requirements.
6.How does Aetrix verify that JANTX1N4121D-1/TR is sourced from the original manufacturer or authorized distributors?
All JANTX1N4121D-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 JANTX1N4121D-1/TR meets industry standards.
7.What is the process for return or replacement of JANTX1N4121D-1/TR?
All JANTX1N4121D-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANTX1N4121D-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 JANTX1N4121D-1/TR part is unused and in its original packaging.
Return procedure for JANTX1N4121D-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
JANTX1N4121D-1/TR Tags
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