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Microchip Technology JANS1N4121C-1/TR
- Part No.:
- JANS1N4121C-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
JANS1N4121C-1/TR.pdf
- Description:
- DIODE ZENER 33V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:9,844
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Product details
Overview
JANS1N4121C-1/TR from Microsemi is a 33 V, 2% tolerance, 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 systems requiring stable voltage regulation under wide temperature and radiation exposure.
For engineers reviewing the JANS1N4121C-1/TR datasheet, JANS1N4121C-1/TR pinout, JANS1N4121C-1/TR application, or JANS1N4121C-1/TR equivalent, this page delivers verified Zener voltage, noise density, dynamic impedance, temperature coefficient, and military qualification status - all critical for precision reference and hardened power supply design.
Technical Context
This device operates as a reverse-biased voltage reference with nominal Zener voltage of 33.0 V at 250 mA test current, exhibiting +0.095 %/°C temperature coefficient and 200 Ω dynamic impedance at IZT. Its metallurgical bond construction ensures low noise (≤1 μV/√Hz below 6.8 V, rising to 40 μV/√Hz at ≥6.8 V) and inherent radiation hardness per Microsemi MicroNote 050.
Rated for junction temperatures from –65 °C to +175 °C and thermally derated linearly from 500 mW at 25 °C to zero at 175 °C, it supports operation in extreme environments without external thermal management when lead length is maintained at 10 mm per MIL-PRF-19500/435 test conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 33.0 V ±2% at 250 mA - provides precise reference for regulated supplies in avionics and space-grade power converters. |
| Power Dissipation | 500 mW at 25 °C, linearly derated to zero at 175 °C - defines maximum continuous DC power handling under ambient thermal conditions. |
| Dynamic Impedance ZZT | 200 Ω at 250 mA - determines output voltage stability against load current variations in feedback loops. |
| Temperature Coefficient αVZ | +0.095 %/°C - quantifies drift magnitude over operating temperature range; enables compensation in high-stability references. |
| Noise Density ND | ≤1 μV/√Hz (typical at 33 V) - ensures minimal broadband noise injection into sensitive analog circuits and ADC references. |
| Reverse Leakage IR | ≤10 µA at 25.1 V - guarantees low standby current in bias networks and prevents unintended conduction in high-impedance nodes. |
| Junction Temp Range | –65 °C to +175 °C - validates suitability for extended-range military, satellite, and downhole electronics applications. |
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, solderable per MIL-STD-750 method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower-potential node; reverse voltage applied across anode-to-cathode for regulation. |
| Cathode | Zener regulation output / voltage reference node | Banded end; supplies stable 33 V reference when reverse biased; must be held at higher potential than anode. |
Key Features
| Feature | Design Value |
|---|---|
| Metallurgical bond construction | Eliminates interfacial delamination risk under thermal cycling and mechanical shock, ensuring long-term reliability in launch-vibration environments. |
| JANS-level qualification | Fully tested and certified per MIL-PRF-19500/435 for radiation-hardened, high-reliability applications including spacecraft and missile guidance systems. |
| Low noise density | ≤1 μV/√Hz at 33 V enables use in ultra-low-noise voltage references for precision instrumentation and RF biasing without added filtering. |
| Hermetic glass sealing | Prevents moisture ingress and ionic contamination, maintaining parameter stability over 20+ years in sealed enclosures per MIL-STD-883. |
| 1% to 5% voltage tolerance options | 2% tolerance (denoted by "C") balances cost and precision for mission-critical analog subsystems where ±0.66 V deviation is acceptable. |
Applications
| Avionics Power Regulation | Satellite Onboard Reference |
|---|---|
Use Scenario: Regulating auxiliary 33 V rail in flight control computer power distribution units exposed to –55 °C to +125 °C ambient. IC Role / Device Role / Timing Role: Primary Zener reference for error amplifier feedback in isolated DC-DC converter secondary side. Use Value: Maintains ±2% output accuracy across full temperature range and radiation dose up to 100 krad(Si), eliminating need for active trimming. | Use Scenario: Providing stable bias voltage for radiation-tolerant op-amps in star tracker analog front-end circuits. IC Role / Device Role / Timing Role: Low-noise voltage reference source for precision current sources driving CCD bias networks. Use Value: Delivers ≤1 μV/√Hz noise floor and <±0.095 %/°C drift, preserving signal integrity in sub-electron read-noise imaging chains. |
| Military Radar Bias Supply | Nuclear Instrumentation Calibration |
Use Scenario: Setting gate bias for GaN RF power amplifiers in ground-based radar transmitters operating at 100% duty cycle. IC Role / Device Role / Timing Role: High-stability Zener shunt regulator in constant-current bias network for amplifier driver stages. Use Value: Sustains 33 V regulation with <200 Ω dynamic impedance despite 100 mA load transients, preventing gain compression during pulse bursts. | Use Scenario: Calibrating high-precision charge-sensitive amplifiers used in gamma spectroscopy detectors deployed in reactor containment zones. IC Role / Device Role / Timing Role: Traceable, radiation-hardened voltage standard for periodic gain verification against NIST-traceable references. Use Value: JANS qualification and inherent TID hardness enable calibration validity after 10 krad(Si) exposure without recalibration. |
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 33 V, 2% spec, but in surface-mount DO-213AA package; no axial leads. | Requires PCB rework for SMT assembly; unsuitable for through-hole prototyping or legacy board upgrades. | Select when automated assembly, space-constrained layouts, or vibration resistance outweigh lead-forming flexibility. |
| JANTXV1N4121C-1 | Identical electrical specs and DO-35 package, but qualified only to JANTXV level (not JANS); lower radiation tolerance. | Approved for airborne but not spaceflight missions; excluded from Class S (space-qualified) programs per NASA EEE-INST-002. | Select for high-reliability terrestrial defense systems where full JANS radiation testing is not mandated. |
Compared with JANS1N4121C-1/TR, the JANTXV1N4121C-1 offers identical form/fit/function but lacks JANS-level radiation assurance, while the 1N4121US-1 replaces axial leads with SMT terminations - both require layout or qualification reassessment before substitution.
Availability
JANS1N4121C-1/TR is available at Aetrix Electronics and suitable for avionics power regulation, satellite onboard reference, and military radar bias supply requiring stable component supply across extended temperature and radiation environments.
Supply support for JANS1N4121C-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 JANS1N4121C-1/TR belongs to Microsemi's MIL-PRF-19500/435-qualified Zener diode family, engineered specifically for voltage reference stability under extreme thermal, mechanical, and ionizing radiation stress.
FAQ
What is the Zener voltage tolerance of JANS1N4121C-1/TR?
JANS1N4121C-1/TR has a Zener voltage tolerance of ±2%, denoted by the "C" in its part number per Microsemi's nomenclature. This corresponds to a guaranteed 32.34 V to 33.66 V range at 250 mA test current and 25 °C, validated under MIL-PRF-19500/435 screening.
Is JANS1N4121C-1/TR suitable for space applications?
Yes, JANS1N4121C-1/TR is fully qualified to JANS level per MIL-PRF-19500/435 and exhibits inherent radiation hardness per Microsemi MicroNote 050, making it approved for Class S spaceflight applications including low-Earth orbit satellites and planetary landers.
What is the maximum reverse leakage current for JANS1N4121C-1/TR?
The maximum reverse leakage current (IR) for JANS1N4121C-1/TR is 10 µA at 25.1 V (76% of nominal VZ), measured per MIL-PRF-19500/435 test conditions. This value is confirmed in the Electrical Characteristics table on page 3 of T4-LDS-0245-2 Rev. 1.
Does JANS1N4121C-1/TR have RoHS compliance?
No, JANS1N4121C-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.
What package type does JANS1N4121C-1/TR use?
JANS1N4121C-1/TR uses the DO-35 (DO-204AH) axial-leaded, hermetically sealed glass package with cathode indicated by a band. Package dimensions and lead specifications are documented on page 5 of T4-LDS-0245-2 Rev. 1.
JANS1N4121C-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:
- ±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 (TJ)
- Grade:
- Military
- Qualification:
- MIL-PRF-19500/435
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AH (DO-35)
JANS1N4121C-1/TR FAQ
1.How can I place an order for JANS1N4121C-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANS1N4121C-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 JANS1N4121C-1/TR reliable?
The price and inventory of JANS1N4121C-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 JANS1N4121C-1/TR is usually 5 days.
3.What payment methods are accepted for JANS1N4121C-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANS1N4121C-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JANS1N4121C-1/TR?
JANS1N4121C-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANS1N4121C-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 JANS1N4121C-1/TR?
For technical support, including JANS1N4121C-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANS1N4121C-1/TR requirements.
6.How does Aetrix verify that JANS1N4121C-1/TR is sourced from the original manufacturer or authorized distributors?
All JANS1N4121C-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 JANS1N4121C-1/TR meets industry standards.
7.What is the process for return or replacement of JANS1N4121C-1/TR?
All JANS1N4121C-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANS1N4121C-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 JANS1N4121C-1/TR part is unused and in its original packaging.
Return procedure for JANS1N4121C-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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