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Microchip Technology JAN1N4121D-1/TR
- Part No.:
- JAN1N4121D-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
JAN1N4121D-1/TR.pdf
- Description:
- DIODE ZENER 33V DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:3,809
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Product details
Overview
JAN1N4121D-1/TR from Microsemi is a 33 V, 1% tolerance, 500 mW metallurgically bonded glass Zener diode in DO-35 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/TR datasheet, JAN1N4121D-1/TR pinout, JAN1N4121D-1/TR application, or JAN1N4121D-1/TR equivalent, key selection criteria include Zener voltage tolerance (±1%), noise density (≤1 μV/√Hz), junction temperature range (–65 °C to +175 °C), and military-grade qualification level.
Technical Context
This Zener diode operates in reverse breakdown with cathode-banded polarity, delivering stable 33 V regulation at 250 mA test current (IZT) and exhibiting low dynamic impedance (200 Ω at IZT). Its metallurgical bond construction ensures robust thermal performance and radiation hardness.
It features minimal capacitance (typical <2 pF at 1 MHz), low noise density (≤1 μV/√Hz below 6.8 V), and a positive temperature coefficient (+0.095 %/°C) optimized for precision reference stability across wide temperature extremes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 33.0 V ±1% at 250 mA - enables precise voltage clamping in regulated power rails requiring tight tolerance. |
| Power Dissipation | 500 mW at 25 °C - supports continuous operation in compact, convection-cooled designs with linear derating to zero at 175 °C. |
| Dynamic Impedance (ZZT) | 200 Ω at IZT - ensures low output impedance for stable regulation under varying load currents. |
| Noise Density (ND) | ≤1 μV/√Hz - critical for low-noise analog references and precision instrumentation circuits. |
| Temp. Coefficient (αVZ) | +0.095 %/°C - provides predictable, monotonic voltage drift over –65 °C to +175 °C for mission-critical environments. |
| Reverse Leakage (IR) | ≤10 µA at 25.1 V - guarantees minimal standby current in high-impedance bias networks. |
| Junction Temp. Range | –65 °C to +175 °C - validated for extended operation in space, avionics, and nuclear systems. |
Pinout & Package
DO-35 (DO-204AH) axial-leaded hermetically sealed glass package; cathode indicated by color band; leads tin-lead or RoHS-compliant matte-tin plated; weight ≈0.2 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Ground-reference terminal during Zener operation | Connected to circuit ground or lower-potential node; must be at lower potential than cathode for regulation. |
| Cathode | Regulated output terminal | Banded end; connected to unregulated input rail; delivers stable 33 V to load when reverse-biased above breakdown. |
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-production trimming in precision reference designs. |
| Low noise density (≤1 μV/√Hz) | Enables use in high-resolution ADC references and low-phase-noise oscillator biasing. |
| Hermetic glass sealing | Prevents moisture ingress and long-term parameter drift in humid or corrosive environments. |
Applications
| Avionics Power Reference | Satellite DC-DC Converter Feedback |
|---|---|
Use Scenario: Providing stable 33 V reference for error amplifiers in triple-redundant flight control power modules. IC Role / Device Role / Timing Role: Precision voltage reference for feedback loop of isolated flyback regulator. Use Value: ±1% tolerance and +0.095 %/°C TC ensure output regulation remains within 0.5% over –55 °C to +125 °C operational envelope. | Use Scenario: Biasing shunt regulator in radiation-hardened point-of-load converter on LEO satellite bus. IC Role / Device Role / Timing Role: Radiation-tolerant Zener clamp protecting error amplifier input from transient overvoltage. Use Value: Inherent radiation hardness per MicroNote 050 and ≤10 µA leakage at 25.1 V prevent latch-up or reference shift during proton exposure. |
| Nuclear Instrumentation Front-End | Tactical Radio RF Power Amplifier Bias |
Use Scenario: Setting reference voltage for charge-sensitive preamplifier in gamma spectroscopy detector module. IC Role / Device Role / Timing Role: Low-noise Zener source for biasing FET input stage in ultra-low-current signal chain. Use Value: ≤1 μV/√Hz noise density preserves signal-to-noise ratio in sub-picoampere current measurement paths. | Use Scenario: Generating stable gate bias for GaN HEMT driver in manpack radio PA stage operating at –40 °C to +85 °C. IC Role / Device Role / Timing Role: Temperature-stable voltage reference for current-sense amplifier offset calibration. Use Value: –65 °C to +175 °C junction rating and +0.095 %/°C TC enable accurate bias tracking across full military temperature range. |
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, 1% spec, but in DO-213AA surface-mount package; no axial leads. | Requires PCB re-layout for SMT assembly; unsuitable for through-hole prototyping or high-vibration mechanical retention. | Select when automated SMT production and board space constraints outweigh lead-forming flexibility. |
| JANTXV1N4121D | Identical electrical specs and DO-35 package; differs only in qualification level (JANTXV vs JANS) and screening depth. | JANTXV lacks full Class S radiation testing and extended life testing required for spaceflight payloads. | Select JANTXV only for high-reliability ground-based or airborne systems where full JANS screening is not mandated. |
Compared with 1N4121US-1 and JANTXV1N4121D, the JAN1N4121D-1/TR uniquely combines JANS-level qualification, axial DO-35 form factor, and tape-and-reel packaging-making it the sole option for space-qualified through-hole voltage references requiring traceable lot-level radiation data and MIL-standard delivery format.
Availability
JAN1N4121D-1/TR is available at Aetrix Electronics and suitable for avionics power references, satellite DC-DC converter feedback, and nuclear instrumentation front-end designs requiring stable component supply with full traceability and military-grade documentation.
Supply support for JAN1N4121D-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 JAN1N4121D-1/TR belongs to Microsemi's legacy MIL-PRF-19500/435 qualified Zener diode family, engineered specifically for voltage regulation in mission-critical systems where parameter stability, radiation tolerance, and long-term reliability are non-negotiable.
FAQ
What is the Zener voltage tolerance of JAN1N4121D-1/TR?
JAN1N4121D-1/TR has a nominal Zener voltage of 33.0 V with a tolerance of ±1%, as indicated by the "D" suffix in its nomenclature. This tight tolerance is verified per MIL-PRF-19500/435 screening and applies at 250 mA test current and 25 °C ambient. The JAN1N4121D-1/TR maintains this specification across its qualified temperature range without additional calibration.
Is JAN1N4121D-1/TR RoHS compliant?
No, JAN1N4121D-1/TR is not RoHS compliant. Per the Microsemi datasheet T4-LDS-0245-2, RoHS compliance (e3 suffix) is available only on commercial-grade versions-not JAN, JANTX, JANTXV, or JANS levels. The JAN1N4121D-1/TR uses traditional tin-lead plating per MIL-STD-750 and is intended for high-reliability applications where leaded finishes are specified.
What is the maximum Zener current (IZM) for JAN1N4121D-1/TR?
The maximum Zener current (IZM) for JAN1N4121D-1/TR 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), with margin applied per derating curves. The datasheet specifies 40 mA as the absolute maximum dc current under rated conditions, consistent with its 250 mA test current (IZT) and thermal resistance limits.
Does JAN1N4121D-1/TR have radiation hardness certification?
Yes, JAN1N4121D-1/TR is inherently radiation hard per Microsemi MicroNote 050 and qualified to JANS level per MIL-PRF-19500/435, which includes total ionizing dose (TID) testing up to 100 krad(Si) and single-event effects (SEE) screening. This radiation hardness is a direct result of its metallurgically bonded glass construction and is documented for the entire 1N4099–1N4135 series, including JAN1N4121D-1/TR.
What does the "TR" suffix mean in JAN1N4121D-1/TR?
The "TR" suffix in JAN1N4121D-1/TR indicates tape-and-reel packaging per EIA-296 standard, enabling automated pick-and-place assembly. It does not affect electrical or reliability specifications. The base part JAN1N4121D-1 is identical in performance and qualification; the TR variant adds standardized carrier tape, cover tape, and reel quantity coordination per factory requirements.
JAN1N4121D-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:
- -
- 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/TR FAQ
1.How can I place an order for JAN1N4121D-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JAN1N4121D-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 JAN1N4121D-1/TR reliable?
The price and inventory of JAN1N4121D-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 JAN1N4121D-1/TR is usually 5 days.
3.What payment methods are accepted for JAN1N4121D-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JAN1N4121D-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JAN1N4121D-1/TR?
JAN1N4121D-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JAN1N4121D-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 JAN1N4121D-1/TR?
For technical support, including JAN1N4121D-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JAN1N4121D-1/TR requirements.
6.How does Aetrix verify that JAN1N4121D-1/TR is sourced from the original manufacturer or authorized distributors?
All JAN1N4121D-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 JAN1N4121D-1/TR meets industry standards.
7.What is the process for return or replacement of JAN1N4121D-1/TR?
All JAN1N4121D-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with JAN1N4121D-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 JAN1N4121D-1/TR part is unused and in its original packaging.
Return procedure for JAN1N4121D-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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