My Inquiry
My Account
Microchip Technology JANS1N4120-1/TR
- Part No.:
- JANS1N4120-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
JANS1N4120-1/TR.pdf
- Description:
- DIODE ZENER 30V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:9,631
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
JANS1N4120-1/TR from Microsemi is a 30.0 V, 500 mW metallurgically bonded glass Zener diode in DO-35 (DO-204AH) axial package, qualified to JANS level per MIL-PRF-19500/435 for high-reliability aerospace and defense applications. It delivers ±5% Zener voltage tolerance, 200 Ω dynamic impedance at 250 mA test current, and operates across –65 °C to +175 °C junction temperature range.
For engineers reviewing the JANS1N4120-1/TR datasheet, JANS1N4120-1/TR pinout, JANS1N4120-1/TR application, or JANS1N4120-1/TR equivalent, key selection criteria include radiation-hardened operation, low noise density (≤1 µV/√Hz below 6.8 V), stable temperature coefficient (+0.095 %/°C), and hermetic glass packaging suitable for harsh-environment voltage regulation.
Technical Context
This device functions as a precision shunt voltage regulator with fixed 30.0 V breakdown voltage, designed for operation in reverse-biased Zener mode. Its metallurgical bond construction ensures mechanical stability under thermal cycling and shock, while its low capacitance (<2 pF typical at 30 V) supports high-frequency stability in reference circuits.
The JANS1N4120-1/TR exhibits a positive temperature coefficient of +0.095 %/°C and maintains ≤0.01 µA reverse leakage at VR = 22.8 V. It is rated for 40 mA maximum Zener current (IZM) and derates linearly from 500 mW at 25 °C to zero at 175 °C ambient on standard FR4 board layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 30.0 V at 250 mA test current - defines precise regulation point for reference and clamp circuits |
| Power Dissipation | 500 mW at 25 °C - sets maximum continuous DC power handling before thermal derating begins |
| Zener Impedance ZZT | 200 Ω at IZT = 250 mA - determines output voltage variation under load current changes |
| Reverse Leakage IR | ≤0.01 µA at VR = 22.8 V - ensures minimal standby current in high-impedance bias networks |
| Temp Coefficient αVZ | +0.095 %/°C - quantifies voltage drift over operating temperature range for stability-critical designs |
| Noise Density ND | ≤1 µV/√Hz - enables low-noise analog references in precision instrumentation and ADC front-ends |
| Junction Temp Range | –65 °C to +175 °C - supports operation in extended-temperature military, space, and downhole systems |
Pinout & Package
DO-35 (DO-204AH) axial-leaded glass package with hermetically sealed construction. Cathode indicated by single black band; banded end must be held positive relative to anode for Zener regulation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to system ground or lowest potential node in shunt regulator configuration |
| Cathode | Zener regulation terminal | Banded end; connected to input supply rail to sink excess current and clamp voltage at 30.0 V |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/435 JANS qualification | Validated reliability for flight-critical and nuclear-hardened systems with full lot traceability |
| Metallurgical bond construction | Eliminates interfacial delamination risk under thermal shock and vibration stress |
| Radiation hardness | Inherently resistant to total ionizing dose (TID) per Microsemi MicroNote 050 - no additional shielding required |
| Low capacitance | Typical <2 pF at 30 V - preserves signal integrity in RF biasing and fast transient suppression |
| ESD immunity | Non-sensitive per MIL-STD-750 Method 1020 - withstands >4 kV HBM without parameter shift |
Applications
| Avionics Power Reference | Satellite Voltage Clamp |
|---|---|
Use Scenario: Provides stable 30.0 V reference for ADC calibration and sensor excitation in airborne navigation computers. IC Role / Device Role / Timing Role: Shunt voltage regulator maintaining precision bias under wide temperature and radiation exposure. Use Value: Enables <±0.5% reference accuracy over –55 °C to +125 °C due to low tempco and radiation hardness. | Use Scenario: Clamps bus voltage during solar array transients in LEO satellite power distribution units. IC Role / Device Role / Timing Role: Overvoltage protection element absorbing surge energy without latch-up or parametric shift. Use Value: Sustains regulation at 30.0 V with <0.01 µA leakage up to 175 °C junction temperature. |
| Nuclear Instrumentation | Downhole Telemetry Bias |
Use Scenario: Supplies regulated bias to gamma-ray detector preamplifiers in reactor monitoring systems. IC Role / Device Role / Timing Role: Low-noise Zener reference minimizing signal-to-noise degradation in analog front-ends. Use Value: Delivers ≤1 µV/√Hz noise density - critical for resolving sub-mV pulse amplitudes. | Use Scenario: Sets stable bias point for pressure/temperature sensor signal conditioning in oil-well logging tools. IC Role / Device Role / Timing Role: High-temperature shunt regulator operating continuously at 150 °C ambient. Use Value: Maintains 30.0 V regulation with <200 Ω dynamic impedance despite 1000+ thermal cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4120-1 | Same electrical specs but qualified to JANTXV level only; lower screening rigor than JANS | Limited to non-flight-critical avionics where full JANS radiation testing not mandated | Select when cost sensitivity outweighs requirement for full JANS-level TID validation |
| 1N4120US-TR | Surface-mount DO-213AA package; identical Zener parameters but different thermal resistance (RθJL = 200 °C/W) | Used where PCB space constraints prohibit axial leads or automated placement is required | Choose for compact layouts needing same regulation performance with reflow-compatible mounting |
Compared with JANS1N4120-1/TR, JANTXV1N4120-1 offers reduced qualification depth for cost-sensitive programs, while 1N4120US-TR provides identical regulation in a surface-mount form factor-enabling layout flexibility without sacrificing voltage accuracy or noise performance.
Availability
JANS1N4120-1/TR is available at Aetrix Electronics and suitable for avionics power reference, satellite voltage clamp, and nuclear instrumentation requiring stable component supply with full MIL-spec traceability and long-term obsolescence management.
Supply support for JANS1N4120-1/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 JANS1N4120-1/TR belongs to Microsemi's legacy MIL-qualified Zener diode family, engineered specifically for radiation-tolerant, high-temperature voltage regulation in mission-critical systems.
FAQ
What is the Zener voltage tolerance for JANS1N4120-1/TR?
The JANS1N4120-1/TR has a nominal Zener voltage of 30.0 V with a standard tolerance of ±5%, as defined in the JEDEC-registered specification and confirmed in the Electrical Characteristics table on page 3 of T4-LDS-0245-2 Rev. 1. This tolerance applies under standard test conditions at 25 °C with IZT = 250 mA.
Is JANS1N4120-1/TR RoHS compliant?
No, JANS1N4120-1/TR is not RoHS compliant. Per the nomenclature guide on page 2 of T4-LDS-0245-2 Rev. 1, the "e3" suffix denotes RoHS compliance, which appears only on commercial-grade versions. JANS-level devices like JANS1N4120-1/TR use tin-lead plating and are exempt from RoHS per MIL-PRF-19500 requirements.
What is the maximum Zener current rating for JANS1N4120-1/TR?
The maximum Zener current (IZM) for JANS1N4120-1/TR is 40 mA, as specified in the Electrical Characteristics table on page 3 of T4-LDS-0245-2 Rev. 1. This value corresponds to the current at which the device dissipates its rated 500 mW at 30.0 V, assuming thermal equilibrium at 25 °C lead temperature.
Does JANS1N4120-1/TR require heatsinking in standard PCB layouts?
No additional heatsinking is required for JANS1N4120-1/TR under typical conditions. Its thermal resistance junction-to-lead is 250 °C/W with 10 mm lead length, and it linearly derates from 500 mW at 25 °C to zero at 175 °C - sufficient for most 30 V/40 mA applications on FR4 boards with standard copper pads per note 1 on page 1.
How is polarity marked on JANS1N4120-1/TR?
JANS1N4120-1/TR uses a single black cathode band on the glass body to indicate polarity. As stated in the Mechanical and Packaging section on page 2 of T4-LDS-0245-2 Rev. 1, the diode must be operated with the banded (cathode) end positive relative to the unmarked (anode) end to achieve Zener regulation at 30.0 V.
JANS1N4120-1/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):
- 30 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 200 Ohms
- Current - Reverse Leakage @ Vr:
- 10 nA @ 22.8 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)
JANS1N4120-1/TR FAQ
1.How can I place an order for JANS1N4120-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANS1N4120-1/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 JANS1N4120-1/TR reliable?
The price and inventory of JANS1N4120-1/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANS1N4120-1/TR is usually 5 days.
3.What payment methods are accepted for JANS1N4120-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANS1N4120-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JANS1N4120-1/TR?
JANS1N4120-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANS1N4120-1/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 JANS1N4120-1/TR?
For technical support, including JANS1N4120-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANS1N4120-1/TR requirements.
6.How does Aetrix verify that JANS1N4120-1/TR is sourced from the original manufacturer or authorized distributors?
All JANS1N4120-1/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 JANS1N4120-1/TR meets industry standards.
7.What is the process for return or replacement of JANS1N4120-1/TR?
All JANS1N4120-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANS1N4120-1/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 JANS1N4120-1/TR part is unused and in its original packaging.
Return procedure for JANS1N4120-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
JANS1N4120-1/TR Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
