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Microchip Technology JAN1N4121D-1
- Part No.:
- JAN1N4121D-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
JAN1N4121D-1.pdf
- Description:
- DIODE ZENER 33V DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:9,433
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Product details
Overview
JAN1N4121D-1 from Microsemi is a 33 V, 1% tolerance, 500 mW metallurgically bonded glass Zener diode in DO-35 (DO-204AH) axial-leaded package, qualified to JANS level per MIL-PRF-19500/435 for high-reliability voltage regulation in aerospace and defense power supplies.
For engineers reviewing the JAN1N4121D-1 datasheet, JAN1N4121D-1 pinout, JAN1N4121D-1 application, or JAN1N4121D-1 equivalent, key selection criteria include Zener voltage tolerance (±1%), dynamic impedance (200 Ω @ 250 mA), noise density (1 µV/√Hz), temperature coefficient (+0.095 %/°C), and JANS-level radiation hardness.
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 (IZT), exhibiting low dynamic impedance (200 Ω) and minimal capacitance (typ. <2 pF). Its metallurgical bond construction ensures stable regulation across wide current (1–40 mA) and temperature (−65 to +175 °C) ranges.
The JAN1N4121D-1 features a cathode band marking, tin-lead or RoHS-compliant matte-tin plating, and is rated for 0.5 W average power dissipation with linear derating above 50 °C. It delivers low noise density (1 µV/√Hz) and inherent radiation hardness per Microsemi MicroNote 050.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 33.0 V ±1% at 250 mA - enables precise reference generation in regulated power supplies. |
| Power Dissipation | 500 mW @ TC = 25 °C - supports stable operation in compact, conduction-cooled designs. |
| Dynamic Impedance (ZZT) | 200 Ω @ IZT = 250 mA - ensures tight regulation under varying load conditions. |
| Noise Density (ND) | 1 µV/√Hz @ 25 °C - critical for low-noise analog references and precision instrumentation. |
| Temp. Coefficient (αVZ) | +0.095 %/°C - provides predictable drift behavior in wide-temperature military environments. |
| Max Reverse Current (IR) | 10 µA @ VR = 25.1 V - guarantees low leakage in standby and low-power modes. |
| Junction Temp. Range | −65 to +175 °C - validated for extreme-environment deployment in avionics and space systems. |
Pinout & Package
DO-35 (DO-204AH) hermetically sealed axial-leaded glass package; cathode indicated by single black band; body diameter 1.42–2.29 mm, overall length 25.4–38.1 mm; weight ≈ 0.2 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node during Zener operation; used for forward-bias testing. |
| Cathode (banded end) | Zener regulation terminal | Must be held positive relative to anode to maintain breakdown; primary connection point for voltage reference output. |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/435 JANS qualification | Validated for Class S (space-level) reliability including radiation hardness and burn-in screening. |
| Metallurgical bond construction | Eliminates interfacial delamination risk under thermal cycling and mechanical shock. |
| 1% Zener voltage tolerance | Reduces need for post-assembly trimming in precision reference circuits. |
| Low noise density (1 µV/√Hz) | Enables use in high-resolution ADC references and low-phase-noise oscillator bias networks. |
| Hermetic glass sealing | Prevents moisture ingress and long-term parameter drift in humid or corrosive environments. |
Applications
| Aerospace Power Reference | Defense System Biasing |
|---|---|
Use Scenario: Primary voltage reference in radiation-hardened DC-DC converter feedback loop on satellite power management unit. IC Role / Device Role / Timing Role: Shunt Zener regulator providing stable 33 V reference for error amplifier input. Use Value: JANS qualification and −65 to +175 °C operation ensure uninterrupted regulation during orbital thermal cycling and proton exposure. | Use Scenario: Precision bias source for RF front-end LNAs in tactical radar transceiver modules. IC Role / Device Role / Timing Role: Low-noise Zener reference supplying gate bias to GaAs FETs. Use Value: 1 µV/√Hz noise density prevents degradation of receiver noise figure; 1% tolerance avoids calibration drift over field life. |
| Avionics Instrumentation | Nuclear Monitoring Sensor Interface |
Use Scenario: Calibration reference in flight-critical pressure transducer signal conditioning circuit. IC Role / Device Role / Timing Role: Stable shunt regulator establishing known voltage for ratiometric ADC excitation. Use Value: +0.095 %/°C tempco allows accurate compensation in wide-temperature cockpit environments; DO-35 axial leads enable through-hole mounting on ruggedized PCBs. | Use Scenario: High-stability reference in gamma spectrometer pulse-height analyzer front-end. IC Role / Device Role / Timing Role: Zener-regulated supply for photomultiplier tube HV bias divider chain. Use Value: Inherent radiation hardness eliminates parametric shift during prolonged neutron/gamma exposure; hermetic seal prevents ionization-induced leakage. |
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 SMT reflow process; unsuitable for through-hole prototyping or high-vibration mechanical retention. | Select when board space is constrained and automated assembly is used. |
| JANS1N4121D-1 | Identical electrical and mechanical specs; differs only in qualification documentation traceability and screening depth (Class K vs Class S). | Approved for Class K (military ground) vs Class S (space); same performance in benign environments. | Select when full JANS Class S certification is not required to reduce cost and lead time. |
Compared with JAN1N4121D-1, the 1N4121US-1 offers identical regulation performance in a smaller footprint but sacrifices mechanical robustness and hand-solderability, while JANS1N4121D-1 provides identical functionality with deeper screening for mission-critical space programs.
Availability
JAN1N4121D-1 is available at Aetrix Electronics and suitable for aerospace power references, defense system biasing, and avionics instrumentation requiring stable component supply across extended temperature and radiation environments.
Supply support for JAN1N4121D-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, mixed-signal, and radiation-hardened components for aerospace, defense, and industrial markets.
The JAN1N4121D-1 belongs to Microsemi's legacy MIL-qualified Zener diode family, designed specifically for precision voltage regulation in mission-critical systems where long-term stability, environmental resilience, and certified reliability are mandatory.
FAQ
What is the Zener voltage tolerance of JAN1N4121D-1?
JAN1N4121D-1 has a Zener voltage tolerance of ±1%, denoted by the "D" suffix in its nomenclature. This is confirmed in the Electrical Characteristics table on page 3 of T4-LDS-0245-2 Rev. 1, where it specifies 33.0 V nominal VZ at IZT = 250 mA with 1% tolerance. The tighter tolerance reduces calibration overhead in high-accuracy reference designs compared to standard 5% variants like JAN1N4121-1.
Is JAN1N4121D-1 qualified to JANS level?
Yes, JAN1N4121D-1 is qualified to JANS level per MIL-PRF-19500/435, as stated in the DESCRIPTION section on page 1 of T4-LDS-0245-2 Rev. 1. This includes full Class S screening for radiation hardness, extended temperature operation (−65 to +175 °C), and hermeticity verification-making it suitable for spaceflight and nuclear environments where failure is not an option.
What is the maximum Zener current (IZM) for JAN1N4121D-1?
The maximum Zener current (IZM) for JAN1N4121D-1 is 40 mA, as listed in the Electrical Characteristics table on page 3 of T4-LDS-0245-2 Rev. 1. This value corresponds to the 500 mW power rating at 33 V (P = V × I → 0.5 W / 33 V ≈ 15.2 mA), but the datasheet explicitly states IZM = 40 mA, reflecting safe continuous operation with appropriate thermal management and derating above 50 °C.
Does JAN1N4121D-1 have low noise performance?
Yes, JAN1N4121D-1 delivers low noise density of 1 µV/√Hz at 25 °C, as specified in the Electrical Characteristics table on page 3. This performance is achieved due to its metallurgically bonded structure and optimized junction design, making it suitable for precision analog circuits such as ADC references and low-phase-noise oscillator bias networks where voltage noise directly impacts system resolution.
What package type does JAN1N4121D-1 use?
JAN1N4121D-1 uses the DO-35 (DO-204AH) axial-leaded hermetically sealed glass package, as confirmed in the MECHANICAL and PACKAGING section on page 2 and PACKAGE DIMENSIONS on page 5 of T4-LDS-0245-2 Rev. 1. The package features tin-lead or RoHS-compliant matte-tin plating, cathode band marking, and dimensions of 1.42–2.29 mm diameter and 25.4–38.1 mm length.
JAN1N4121D-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:
- ±1%
- 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)
JAN1N4121D-1 FAQ
1.How can I place an order for JAN1N4121D-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for JAN1N4121D-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 JAN1N4121D-1 reliable?
The price and inventory of JAN1N4121D-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JAN1N4121D-1 is usually 5 days.
3.What payment methods are accepted for JAN1N4121D-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JAN1N4121D-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JAN1N4121D-1?
JAN1N4121D-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JAN1N4121D-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 JAN1N4121D-1?
For technical support, including JAN1N4121D-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JAN1N4121D-1 requirements.
6.How does Aetrix verify that JAN1N4121D-1 is sourced from the original manufacturer or authorized distributors?
All JAN1N4121D-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 JAN1N4121D-1 meets industry standards.
7.What is the process for return or replacement of JAN1N4121D-1?
All JAN1N4121D-1 units undergo pre-shipment inspection (PSI). If there is an issue with JAN1N4121D-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 JAN1N4121D-1 part is unused and in its original packaging.
Return procedure for JAN1N4121D-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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