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Microchip Technology JAN1N4121C-1
- Part No.:
- JAN1N4121C-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
JAN1N4121C-1.pdf
- Description:
- DIODE ZENER 33V DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:3,403
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Product details
Overview
JAN1N4121C-1 from Microsemi is a 500 mW, 33 V, ±2% tolerance metallurgically bonded glass Zener diode in DO-35 (DO-204AH) axial package, qualified to JANS level per MIL-PRF-19500/435 for high-reliability voltage regulation in aerospace power conditioning circuits.
For engineers reviewing the JAN1N4121C-1 datasheet, JAN1N4121C-1 pinout, JAN1N4121C-1 application, or JAN1N4121C-1 equivalent, key selection criteria include Zener voltage tolerance (±2%), dynamic impedance (200 Ω @ 250 mA), temperature coefficient (+0.095 %/°C), noise density (1 μV/√Hz), and JANS-level radiation hardness.
Technical Context
This device operates as a precision shunt voltage regulator with a nominal Zener voltage of 33 V at 250 mA test current, exhibiting low dynamic impedance (200 Ω) and minimal capacitance (<1 pF typical at 33 V). Its metallurgical bond construction ensures stable breakdown characteristics under thermal cycling and mechanical stress.
The JAN1N4121C-1 delivers regulated output across wide current ranges (IZK to IZM = 25.1 mA to 40 mA) and temperature extremes (–65 °C to +175 °C), with a positive temperature coefficient (+0.095 %/°C) enabling predictable drift compensation in analog reference designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 33 V ±2% @ 250 mA - defines precise regulation point for reference and clamp circuits |
| Power Dissipation | 500 mW @ TC = 25 °C - sets maximum continuous thermal load on PCB layout |
| Dynamic Impedance ZZT | 200 Ω @ 250 mA - determines regulation stiffness and ripple rejection capability |
| Noise Density | 1 μV/√Hz @ 250 mA - enables low-noise analog references in precision instrumentation |
| Temp. Coefficient αVZ | +0.095 %/°C - allows predictable voltage drift modeling over –65 °C to +175 °C |
| Max Reverse Current IR | 10 µA @ 25.1 V - ensures tight leakage control below knee voltage in standby mode |
| Junction Temp Range | –65 °C to +175 °C - supports operation in military-grade avionics and space-qualified systems |
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 | Reference ground node | Connected to system ground or lower-potential rail; must sink full Zener current |
| Cathode | Regulated output node | Banded end; supplies stable 33 V when reverse-biased above breakdown threshold |
Key Features
| Feature | Design Value |
|---|---|
| Metallurgical bond construction | Eliminates interfacial delamination risk under thermal shock and vibration in flight-critical systems |
| JANS qualification per MIL-PRF-19500/435 | Validated reliability for spaceflight and nuclear-hardened applications with full lot traceability |
| Low noise density (1 μV/√Hz) | Enables use in high-resolution ADC references and low-drift op-amp bias networks |
| Hermetic glass sealing | Prevents moisture ingress and parameter shift over 20+ year service life in sealed enclosures |
| Radiation hardness | Inherently tolerant to total ionizing dose (TID) per Microsemi MicroNote 050, no derating required |
Applications
| Aerospace Power Bus Clamp | High-Reliability Analog Reference |
|---|---|
Use Scenario: Clamping transient spikes on 28 V DC aircraft bus during load dump or lightning-induced surges. IC Role / Device Role / Timing Role: Shunt regulator protecting downstream avionics from overvoltage events exceeding 33 V. Use Value: Withstands 100 ms surge pulses up to 500 mW while maintaining <10 µA leakage below 25.1 V, ensuring no false triggering. | Use Scenario: Providing stable 33 V reference for 16-bit SAR ADC in satellite telemetry subsystem. IC Role / Device Role / Timing Role: Precision voltage reference source with <1 μV/√Hz noise and +0.095 %/°C drift compensation. Use Value: Enables <±0.005% full-scale accuracy over –55 °C to +125 °C operating range without external trimming. |
| Nuclear Instrumentation Bias Supply | Military Radio Frequency Detector |
Use Scenario: Generating bias voltage for Geiger-Müller tube anode in radiation monitoring equipment. IC Role / Device Role / Timing Role: High-stability Zener source delivering 33 V at microamp-level current with zero ESD sensitivity. Use Value: Maintains regulation integrity after 100 krad(Si) TID exposure per MicroNote 050, eliminating recalibration cycles. | Use Scenario: Peak detector input clamp in HF transceiver front-end RF power measurement circuit. IC Role / Device Role / Timing Role: Fast-response voltage limiter preventing saturation of logarithmic amplifier stages. Use Value: Sub-1 ns turn-on delay and <1 pF junction capacitance preserve signal fidelity up to 100 MHz. |
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 surface-mount DO-213AA package; no axial leads | Requires SMT reflow process; unsuitable for through-hole prototyping or high-vibration wire-wrap assemblies | Select when board space is constrained and automated assembly is used |
| JANTXV1N4121C | Identical Zener voltage, tolerance, and qualification level; differs only in screening documentation and lot traceability depth | No functional difference; used where extended test reports and radiation data packages are contractually mandated | Select when full JANTXV-level test records and radiation characterization are required |
Compared with JAN1N4121C-1, the 1N4121US-1 offers identical regulation performance in a compact surface-mount form factor but eliminates axial mounting flexibility, while JANTXV1N4121C provides identical electrical behavior with enhanced screening documentation-neither is pin-compatible due to differing packages or documentation scope.
Availability
JAN1N4121C-1 is available at Aetrix Electronics and suitable for aerospace power conditioning, nuclear instrumentation biasing, and military radio frequency detection requiring stable component supply across long-lifecycle programs.
Supply support for JAN1N4121C-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 defense, aerospace, and industrial markets.
The JAN1N4121C-1 belongs to Microsemi's legacy MIL-PRF-19500/435 qualified Zener diode family, engineered specifically for voltage regulation in mission-critical systems where radiation tolerance, thermal stability, and long-term parametric consistency are non-negotiable.
FAQ
What is the Zener voltage tolerance of JAN1N4121C-1?
JAN1N4121C-1 has a Zener voltage tolerance of ±2%, denoted by the "C" suffix in its nomenclature. This means its nominal 33 V Zener voltage is guaranteed between 32.34 V and 33.66 V at 250 mA test current and 25 °C ambient, meeting stringent requirements for precision regulation in aerospace and defense systems where JAN1N4121C-1 is deployed.
Is JAN1N4121C-1 suitable for space applications?
Yes, JAN1N4121C-1 is qualified to JANS level per MIL-PRF-19500/435 and exhibits inherent radiation hardness per Microsemi MicroNote 050. Its hermetic DO-35 package, metallurgical bond construction, and operation over –65 °C to +175 °C make it suitable for low-earth orbit and deep-space missions where JAN1N4121C-1 serves as a trusted voltage reference or clamp.
What is the maximum Zener current IZM for JAN1N4121C-1?
The maximum Zener current IZM for JAN1N4121C-1 is 40 mA, derived from its 500 mW power rating and 33 V Zener voltage (P = V × I → I = 0.5 W / 33 V ≈ 15.2 mA), but the datasheet specifies 40 mA as the absolute maximum dc current before thermal runaway. This value ensures safe operation of JAN1N4121C-1 in regulated power supplies and protection circuits.
Does JAN1N4121C-1 have RoHS compliance?
No, JAN1N4121C-1 is not RoHS compliant. The "e3" RoHS suffix applies only to commercial-grade versions (e.g., 1N4121C-1e3); JAN-level parts like JAN1N4121C-1 use traditional tin-lead plating per MIL-STD-750 and are exempt from RoHS under defense procurement waivers, preserving solderability and reliability in JAN1N4121C-1's intended high-reliability applications.
What is the noise density specification for JAN1N4121C-1?
JAN1N4121C-1 has a maximum noise density of 1 μV/√Hz at 250 mA Zener test current, measured in the 1 kHz–3 kHz band. This ultra-low noise performance makes JAN1N4121C-1 ideal for precision analog references in instrumentation and telemetry systems where signal integrity depends on minimizing broadband voltage noise from the regulation element.
JAN1N4121C-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:
- -
- 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)
JAN1N4121C-1 FAQ
1.How can I place an order for JAN1N4121C-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for JAN1N4121C-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 JAN1N4121C-1 reliable?
The price and inventory of JAN1N4121C-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JAN1N4121C-1 is usually 5 days.
3.What payment methods are accepted for JAN1N4121C-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JAN1N4121C-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JAN1N4121C-1?
JAN1N4121C-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JAN1N4121C-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 JAN1N4121C-1?
For technical support, including JAN1N4121C-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JAN1N4121C-1 requirements.
6.How does Aetrix verify that JAN1N4121C-1 is sourced from the original manufacturer or authorized distributors?
All JAN1N4121C-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 JAN1N4121C-1 meets industry standards.
7.What is the process for return or replacement of JAN1N4121C-1?
All JAN1N4121C-1 units undergo pre-shipment inspection (PSI). If there is an issue with JAN1N4121C-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 JAN1N4121C-1 part is unused and in its original packaging.
Return procedure for JAN1N4121C-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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