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Microchip Technology JANS1N4120D-1/TR
- Part No.:
- JANS1N4120D-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
JANS1N4120D-1/TR.pdf
- Description:
- DIODE ZENER 30V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:5,187
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Product details
Overview
JANS1N4120D-1/TR from Microsemi is a 30 V, 1% tolerance, 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 voltage regulation. It delivers stable reference voltage with 200 Ω dynamic impedance at 250 mA test current, <0.01 µA reverse leakage at 22.8 V, and +0.095 %/°C temperature coefficient.
For engineers reviewing the JANS1N4120D-1/TR datasheet, JANS1N4120D-1/TR pinout, JANS1N4120D-1/TR application, or JANS1N4120D-1/TR equivalent, key selection criteria include Zener voltage tolerance (1%), radiation hardness, hermetic glass packaging, MIL-spec qualification level, and noise density performance in precision analog references.
Technical Context
This device operates as a two-terminal shunt voltage regulator in reverse-biased breakdown mode, with cathode band marking polarity. Its metallurgical bond construction ensures low thermal resistance (RθJL = 250 °C/W) and stable long-term Zener voltage drift under thermal cycling.
The JANS1N4120D-1/TR exhibits a positive temperature coefficient (+0.095 %/°C), making it suitable for temperature-compensated reference designs when paired with negative-TC components. Its 40 µV/√Hz noise density at 30 V supports low-noise analog signal conditioning in instrumentation-grade circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 30.0 V ±1% at 250 mA - precise reference for regulated power supplies and analog circuit biasing |
| Power Dissipation | 500 mW @ TL = 25 °C - supports continuous operation in compact through-hole layouts with 3/8″ lead length |
| Dynamic Impedance ZZT | 200 Ω max at IZT = 250 mA - ensures minimal output voltage variation under load current changes |
| Reverse Leakage IR | <0.01 µA @ VR = 22.8 V - enables ultra-low standby current in battery-backed systems |
| Temp. Coefficient αVZ | +0.095 %/°C - predictable voltage drift for compensated reference design across -65 to +175 °C |
| Noise Density ND | 1 µV/√Hz typical - critical for high-resolution ADC references and precision op-amp feedback networks |
| Junction Temp. Range | -65 to +175 °C - validated for extended-range operation in space and avionics environments |
Pinout & Package
Hermetically sealed axial-leaded DO-35 (DO-204AH) glass package with tin-lead plating; cathode indicated by single black band; weight ≈0.2 g; body diameter 1.42–2.29 mm, length 3.56–5.08 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to system ground or common return; must sink full Zener current during regulation |
| Cathode | Regulated output node | Banded end; supplies stable 30 V to load; requires current-limiting resistor in series |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/435 JANS qualification | Validated reliability for flight-critical systems with full lot traceability and screening per military standards |
| Metallurgical bond construction | Eliminates interfacial delamination risk under thermal shock, ensuring stable VZ over 10+ year service life |
| 1% Zener voltage tolerance | Reduces need for post-assembly trimming in precision reference circuits, lowering calibration cost |
| Radiation hardness | Inherently tolerant to total ionizing dose (TID) per Microsemi MicroNote 050 - suitable for LEO/SatCom applications |
| Low capacitance | Typical <2 pF - preserves high-frequency stability in RF bias networks and fast-switching regulators |
Applications
| Avionics Power Reference | Satellite Sensor Biasing |
|---|---|
Use Scenario: Providing stable 30 V reference for ADC front-end amplifiers in inertial measurement units (IMUs). IC Role / Device Role / Timing Role: Shunt voltage reference regulating supply rail for precision analog signal chain. Use Value: 1% tolerance and +0.095 %/°C TC enable <±0.5% total error over -55 to +125 °C operating range without external compensation. | Use Scenario: Biasing photodiode preamplifiers in star tracker optical sensors aboard LEO satellites. IC Role / Device Role / Timing Role: Low-noise, radiation-hardened voltage reference for transimpedance amplifier feedback network. Use Value: 1 µV/√Hz noise density and inherent TID hardness ensure signal integrity over multi-year orbital missions. |
| Nuclear Instrumentation | Missile Guidance Calibration |
Use Scenario: Generating calibrated reference voltage for pulse-height analyzers in radiation detection equipment. IC Role / Device Role / Timing Role: Precision shunt regulator in high-stability voltage divider networks for spectroscopy channel calibration. Use Value: Hermetic DO-35 package and JANS qualification guarantee parameter stability after neutron/gamma exposure. | Use Scenario: Setting reference thresholds in analog comparators used for gyroscope drift compensation in tactical missile guidance systems. IC Role / Device Role / Timing Role: Temperature-stable voltage reference enabling accurate threshold detection across extreme environmental profiles. Use Value: Linear derating from 500 mW at 25 °C to zero at 175 °C allows reliable operation in high-temperature seeker housings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4120US-1 | Same 30 V, 1% spec but in DO-213AA surface-mount package; no axial leads | Requires PCB rework for SMT assembly; unsuitable for through-hole prototyping or high-vibration mechanical mounting | Select when board space is constrained and automated placement is available |
| JANTXV1N4120D-1 | Identical electrical specs but qualified only to JANTXV level; lower screening rigor than JANS | Approved for non-flight-critical subsystems; not cleared for primary avionics or launch vehicle control | Select for ground-test equipment or secondary systems where full JANS screening is not mandated |
Compared with JANS1N4120D-1/TR, the 1N4120US-1 offers footprint reduction at the cost of mechanical robustness, while JANTXV1N4120D-1 provides identical regulation performance with reduced qualification overhead for less demanding environments.
Availability
JANS1N4120D-1/TR is available at Aetrix Electronics and suitable for avionics power reference, satellite sensor biasing, nuclear instrumentation requiring stable component supply, guaranteed traceability, and long-lifecycle support.
Supply support for JANS1N4120D-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, radiation-hardened, and aerospace-grade analog and mixed-signal components.
The JANS1N4120D-1/TR belongs to Microsemi's legacy MIL-PRF-19500/435 qualified Zener diode family, designed specifically for precision voltage regulation in mission-critical defense, space, and nuclear systems where parameter stability under extreme stress is mandatory.
FAQ
What is the Zener voltage tolerance of JANS1N4120D-1/TR?
JANS1N4120D-1/TR has a nominal Zener voltage of 30.0 V with ±1% tolerance, as indicated by the "D" suffix in its nomenclature per Microsemi's part numbering standard. This tight tolerance is verified per MIL-PRF-19500/435 screening and applies at 250 mA test current and 25 °C ambient temperature. The JANS1N4120D-1/TR maintains this specification across its qualified temperature range.
Is JANS1N4120D-1/TR suitable for radiation-intensive environments?
Yes, JANS1N4120D-1/TR is inherently radiation hard per Microsemi MicroNote 050 and qualified to JANS level per MIL-PRF-19500/435, which includes rigorous radiation testing. Its metallurgically bonded glass construction and hermetic DO-35 package provide proven resilience to total ionizing dose (TID), making JANS1N4120D-1/TR appropriate for satellite, nuclear, and high-altitude avionics applications.
What does the "TR" suffix mean in JANS1N4120D-1/TR?
The "TR" suffix in JANS1N4120D-1/TR indicates tape-and-reel packaging per EIA-296 standard, enabling automated pick-and-place assembly. This format is standard for volume orders and does not affect electrical or reliability specifications. JANS1N4120D-1/TR retains full JANS qualification and 1% Zener tolerance regardless of packaging method.
How is thermal derating applied to JANS1N4120D-1/TR?
JANS1N4120D-1/TR linearly derates from 500 mW at 25 °C ambient to zero at 175 °C, per Figure 2 in the T4-LDS-0245-2 datasheet. Derating begins at 50 °C lead temperature, with RθJL = 250 °C/W measured at 3/8″ lead length. For PCB-mounted use, thermal performance depends on copper pad area and trace geometry as specified in the datasheet notes.
Can JANS1N4120D-1/TR be used in place of commercial-grade 1N4120D-1?
No - JANS1N4120D-1/TR is not a drop-in replacement for commercial 1N4120D-1 due to differences in screening, traceability, and qualification. While both share identical electrical parameters, JANS1N4120D-1/TR undergoes full MIL-PRF-19500/435 JANS-level testing including burn-in, thermal cycling, and lot acceptance tests. Substituting requires formal design change approval in certified systems.
JANS1N4120D-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:
- ±1%
- 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 (TJ)
- Grade:
- Military
- Qualification:
- MIL-PRF-19500/435
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AH (DO-35)
JANS1N4120D-1/TR FAQ
1.How can I place an order for JANS1N4120D-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANS1N4120D-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 JANS1N4120D-1/TR reliable?
The price and inventory of JANS1N4120D-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 JANS1N4120D-1/TR is usually 5 days.
3.What payment methods are accepted for JANS1N4120D-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANS1N4120D-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JANS1N4120D-1/TR?
JANS1N4120D-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANS1N4120D-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 JANS1N4120D-1/TR?
For technical support, including JANS1N4120D-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANS1N4120D-1/TR requirements.
6.How does Aetrix verify that JANS1N4120D-1/TR is sourced from the original manufacturer or authorized distributors?
All JANS1N4120D-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 JANS1N4120D-1/TR meets industry standards.
7.What is the process for return or replacement of JANS1N4120D-1/TR?
All JANS1N4120D-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANS1N4120D-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 JANS1N4120D-1/TR part is unused and in its original packaging.
Return procedure for JANS1N4120D-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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