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Microchip Technology JAN1N4121-1/TR
- Part No.:
- JAN1N4121-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
JAN1N4121-1/TR.pdf
- Description:
- DIODE ZENER 33V DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:3,056
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Product details
Overview
JAN1N4121-1/TR from Microsemi is a 33 V, ±5% tolerance, 500 mW axial-leaded glass Zener diode in DO-35 (DO-204AH) package, metallurgically bonded for high-reliability voltage regulation in military and aerospace power conditioning circuits.
For engineers reviewing the JAN1N4121-1/TR datasheet, JAN1N4121-1/TR pinout, JAN1N4121-1/TR application, or JAN1N4121-1/TR equivalent, key selection criteria include Zener voltage accuracy at 250 mA test current, 200 Ω dynamic impedance at IZT, 0.01 µA reverse leakage at 25.1 V, and JANS-level qualification per MIL-PRF-19500/435.
Technical Context
This device operates as a precision shunt voltage regulator with cathode-banded polarity, requiring reverse-bias operation where the banded end is positive relative to the anode. Its metallurgical bond construction ensures stable junction behavior across -65 °C to +175 °C operating range and inherent radiation hardness per MicroNote 050.
Thermal performance is defined by 250 °C/W junction-to-lead resistance at 3/8″ lead length and linear power derating from 500 mW at 25 °C to zero at 175 °C. Noise density is 1 µV/√Hz at 33 V, consistent with low-noise reference design requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 33.0 V ±5% at 250 mA - defines regulated output voltage under nominal bias conditions |
| Power Dissipation | 500 mW at 25 °C - sets maximum continuous thermal load before derating begins at 50 °C |
| Zener Impedance ZZT | 200 Ω at 250 mA - determines regulation stiffness and output voltage variation under load changes |
| Reverse Leakage IR | 0.01 µA at 25.1 V - ensures minimal parasitic current in high-impedance reference nodes |
| Noise Density | 1 µV/√Hz at 25 °C - supports low-noise analog references in precision instrumentation |
| Temp Coefficient αVZ | +0.095 %/°C - quantifies voltage drift over temperature for stability-critical designs |
| Junction Temp Range | -65 °C to +175 °C - enables operation in extreme environmental conditions without derating |
Pinout & Package
DO-35 (DO-204AH) hermetically sealed axial-leaded glass package with tin-lead or RoHS-compliant matte-tin plating; cathode indicated by band; weight ≈0.2 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference Ground Node | Connected to system ground or lowest potential point in shunt regulator configuration |
| Cathode (banded) | Regulated Output Node | Provides stable 33 V output when reverse-biased; must be held positive relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| Metallurgical Bond Construction | Ensures long-term parameter stability and reduced parameter shift under thermal cycling |
| MIL-PRF-19500/435 Qualification | Validated reliability up to JANS level for mission-critical avionics and space-grade systems |
| Low Capacitance | Typical <1.0 pF - minimizes high-frequency loading in RF bias and timing reference circuits |
| ESD Robustness | Non-sensitive per MIL-STD-750 Method 1020 - eliminates need for external ESD protection in handling |
| Radiation Hardness | Inherently radiation-tolerant per MicroNote 050 - suitable for low-dose-rate space applications without shielding |
Applications
| Avionics Power Reference | Satellite Bus Regulation |
|---|---|
Use Scenario: Providing stable 33 V reference for ADC biasing and sensor excitation in flight control computers. IC Role / Device Role / Timing Role: Shunt voltage reference element maintaining precision analog signal chain integrity. Use Value: ±5% initial tolerance and +0.095 %/°C tempco enable <±1.5% total error over -55 °C to +125 °C operational range. | Use Scenario: Regulating secondary bus voltage in LEO satellite power distribution units. IC Role / Device Role / Timing Role: High-reliability Zener clamp protecting downstream DC-DC converters from overvoltage transients. Use Value: JANS qualification and radiation hardness allow direct use in unshielded bus monitoring without derating. |
| Ground-Based Radar Bias | Nuclear Instrumentation |
Use Scenario: Supplying stable bias to GaAs FET amplifiers in phased-array radar front-end modules. IC Role / Device Role / Timing Role: Low-noise (1 µV/√Hz) voltage reference minimizing phase noise contribution to RF signal path. Use Value: Sub-microamp leakage and minimal capacitance preserve amplifier linearity and gain flatness above 1 GHz. | Use Scenario: Establishing calibrated reference voltage for neutron detector pulse-height analysis circuitry. IC Role / Device Role / Timing Role: Radiation-hardened shunt regulator ensuring measurement accuracy in high-dose environments. Use Value: Inherent radiation tolerance eliminates need for periodic recalibration after gamma exposure events. |
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 | Requires PCB rework for SMT assembly; unsuitable for through-hole prototyping or legacy chassis mounts | Select when automated assembly and board space constraints outweigh manual serviceability needs |
| JANTXV1N4121-1 | Identical DO-35 package and electrical parameters; qualified to JANTXV level instead of JAN | Higher screening rigor and tighter lot traceability; required for Class H/V avionics programs | Select when program specification mandates JANTXV or higher reliability screening level |
Compared with JAN1N4121-1/TR, 1N4121US-1 offers identical regulation performance in a space-saving SMT form factor, while JANTXV1N4121-1 provides enhanced process controls and extended test coverage for safety-critical deployments-neither is pin-compatible due to differing packaging or qualification scope.
Availability
JAN1N4121-1/TR is available at Aetrix Electronics and suitable for avionics power reference, satellite bus regulation, and nuclear instrumentation requiring stable component supply with full MIL-spec traceability and long-term obsolescence management.
Supply support for JAN1N4121-1/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, mixed-signal, and radiation-hardened components for defense, aerospace, and industrial markets.
The JAN1N4121-1/TR belongs to Microsemi's legacy 1N4099–1N4135 series of metallurgically bonded Zener diodes, designed specifically for military-grade voltage regulation where long-term stability, wide temperature operation, and radiation tolerance are mandatory.
FAQ
What is the Zener voltage tolerance for JAN1N4121-1/TR?
JAN1N4121-1/TR has a nominal Zener voltage of 33.0 V with a ±5% tolerance, measured at 250 mA test current under thermal equilibrium at 25 °C. This tolerance is standard for the JAN-level version unless otherwise specified in custom screening.
Is JAN1N4121-1/TR RoHS compliant?
No, JAN1N4121-1/TR is not RoHS compliant. RoHS-compliant versions (e.g., with e3 suffix) are available only for commercial-grade variants; JAN-level devices retain tin-lead plating per MIL-STD-750 for solderability and reliability in high-reliability applications.
What is the maximum reverse leakage current for JAN1N4121-1/TR?
The maximum reverse leakage current for JAN1N4121-1/TR is 0.01 µA at 25.1 V (76% of nominal Zener voltage), as specified in the Electrical Characteristics table on page 3 of T4-LDS-0245-2 Rev. 1.
Can JAN1N4121-1/TR be used in surface-mount designs?
No, JAN1N4121-1/TR uses a DO-35 axial-leaded glass package and is not suitable for surface-mount assembly. For SMT equivalents, consider 1N4121US-1 in DO-213AA or 1PMT4121 in DO-216 package-both share identical electrical specs but differ mechanically.
What does the "TR" suffix indicate in JAN1N4121-1/TR?
"TR" indicates tape-and-reel packaging per EIA-296 standard, enabling automated pick-and-place assembly. The base part JAN1N4121-1 remains electrically and mechanically identical; only the packaging format differs for manufacturing efficiency.
JAN1N4121-1/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:
- ±5%
- Power - Max:
- -
- 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)
JAN1N4121-1/TR FAQ
1.How can I place an order for JAN1N4121-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JAN1N4121-1/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 JAN1N4121-1/TR reliable?
The price and inventory of JAN1N4121-1/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JAN1N4121-1/TR is usually 5 days.
3.What payment methods are accepted for JAN1N4121-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JAN1N4121-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JAN1N4121-1/TR?
JAN1N4121-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JAN1N4121-1/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 JAN1N4121-1/TR?
For technical support, including JAN1N4121-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JAN1N4121-1/TR requirements.
6.How does Aetrix verify that JAN1N4121-1/TR is sourced from the original manufacturer or authorized distributors?
All JAN1N4121-1/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 JAN1N4121-1/TR meets industry standards.
7.What is the process for return or replacement of JAN1N4121-1/TR?
All JAN1N4121-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with JAN1N4121-1/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 JAN1N4121-1/TR part is unused and in its original packaging.
Return procedure for JAN1N4121-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
JAN1N4121-1/TR Tags
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