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Microchip Technology JANS1N4123-1/TR
- Part No.:
- JANS1N4123-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
JANS1N4123-1/TR.pdf
- Description:
- DIODE ZENER 39V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:6,513
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Product details
Overview
JANS1N4123-1/TR from Microsemi is a 39 V, 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 aerospace and defense voltage regulation. It delivers ±5% Zener tolerance, 200 Ω dynamic impedance at 250 mA test current, and operates across –65 °C to +175 °C junction temperature.
For engineers reviewing the JANS1N4123-1/TR datasheet, JANS1N4123-1/TR pinout, JANS1N4123-1/TR application, or JANS1N4123-1/TR equivalent, key selection criteria include its radiation-hardened construction, low noise density (≤1 µV/√Hz below 6.8 V), 0.01 µA max reverse leakage at 31.2 V, and hermetic glass sealing for mission-critical power supply reference stability.
Technical Context
This device functions as a precision shunt voltage regulator with cathode-banded polarity marking, requiring operation with the banded end positive relative to the anode. Its metallurgical bond ensures stable Zener voltage under thermal cycling and mechanical stress, critical for MIL-spec environments.
The JANS1N4123-1/TR exhibits a +0.095 %/°C temperature coefficient and supports regulated output over broad current ranges (IZK to IZM = 29.7 mA max), with derated power dissipation linearly falling 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 | 39.0 V @ 250 mA - precise reference point for regulated rail generation |
| Power Dissipation | 500 mW @ 25 °C - defines maximum continuous thermal load before derating |
| Zener Impedance ZZT | 200 Ω @ 250 mA - determines regulation stiffness against load current variation |
| Reverse Leakage IR | 0.01 µA @ 31.2 V - ensures minimal parasitic current in standby or high-impedance bias networks |
| Temp Coefficient αVZ | +0.095 %/°C - quantifies drift magnitude over operating temperature range |
| Noise Density ND | ≤1 µV/√Hz - enables low-noise analog references in precision instrumentation |
| Junction Temp Range | –65 °C to +175 °C - supports operation in extreme environmental conditions without parameter shift |
Pinout & Package
Package: DO-35 (DO-204AH), axial-leaded, hermetically sealed glass case with tin-lead or RoHS-compliant matte-tin plating; cathode indicated by band; weight ≈0.2 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to system ground or lowest potential point in shunt regulator configuration |
| Cathode | Regulated output node | Banded end; supplies stable 39 V when reverse-biased above breakdown threshold |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/435 JANS qualification | Guarantees screening, testing, and traceability for space-grade reliability and radiation hardness |
| Metallurgical bond construction | Prevents interfacial delamination under thermal shock and vibration in launch environments |
| Hermetic glass encapsulation | Eliminates moisture ingress and long-term parameter drift in humid or corrosive atmospheres |
| Low capacitance (typ. <2 pF) | Minimizes high-frequency coupling and signal integrity impact in RF-adjacent circuits |
| ESD immunity per MIL-STD-750 Method 1020 | Withstands handling and assembly without parametric shift or catastrophic failure |
Applications
| Avionics Power Reference | Satellite Voltage Monitor |
|---|---|
Use Scenario: Providing stable 39 V reference for ADC biasing and sensor excitation in flight control computers. IC Role / Device Role / Timing Role: Shunt voltage regulator establishing precision analog reference rail independent of input ripple. Use Value: Maintains ±0.5% regulation over –55 °C to +125 °C ambient with <1 µV/√Hz noise, ensuring measurement fidelity. | Use Scenario: Monitoring bus voltage in LEO satellite power distribution units during solar array transitions. IC Role / Device Role / Timing Role: Overvoltage clamp and reference element in redundant protection circuitry. Use Value: Survives 100 krad(Si) TID exposure and retains VZ stability within ±2% post-irradiation per MicroNote 050. |
| Missile Guidance Bias Supply | Nuclear Instrumentation Calibration |
Use Scenario: Generating fixed bias for gyro amplifier stages subjected to 20 g vibration and rapid thermal transients. IC Role / Device Role / Timing Role: High-stability Zener reference in analog front-end signal conditioning chain. Use Value: Metallurgical bond prevents parameter shift under mechanical stress; αVZ = +0.095 %/°C enables predictable compensation. | Use Scenario: Calibrating gamma spectrometer high-voltage supplies where reference drift directly impacts energy resolution. IC Role / Device Role / Timing Role: Primary voltage standard in metrology-grade calibration fixtures. Use Value: JANS-level traceability and hermetic seal ensure <0.01% long-term drift over 10-year field deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4123US-1 | Same electrical specs but in surface-mount DO-213AA package; no axial leads | Requires PCB rework for SMT assembly; unsuitable for through-hole prototyping or legacy repair | Select when automated placement and board space reduction outweigh lead-forming flexibility |
| JANTXV1N4123-1 | Identical Zener parameters and DO-35 package, but qualified only to JANTXV level (not JANS) | Lacks full radiation hardness validation and extended screening required for spacecraft payload use | Select for high-reliability ground systems where full JANS qualification is not mandated |
Compared with JANS1N4123-1/TR, the 1N4123US-1 offers identical regulation performance in compact SMT form but sacrifices axial mounting versatility, while JANTXV1N4123-1 provides near-equivalent robustness at lower cost and qualification depth-making it suitable for non-spaceflight military platforms.
Availability
JANS1N4123-1/TR is available at Aetrix Electronics and suitable for avionics power reference, satellite voltage monitor, and missile guidance bias supply requiring stable component supply with full MIL-spec traceability and radiation assurance.
Supply support for JANS1N4123-1/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) designs high-reliability semiconductors for aerospace, defense, and industrial markets, emphasizing radiation tolerance and long-life operation.
The JANS1N4123-1/TR belongs to Microsemi's MIL-qualified Zener diode family engineered specifically for voltage reference and overvoltage protection in mission-critical systems exposed to extreme thermal, mechanical, and radiation environments.
FAQ
What is the Zener voltage tolerance for JANS1N4123-1/TR?
JANS1N4123-1/TR has a nominal Zener voltage of 39.0 V with ±5% tolerance, consistent with the JEDEC-standardized 1N4099–1N4135 series. This tolerance applies at 250 mA test current and 25 °C ambient, and is verified per MIL-PRF-19500/435 screening requirements for JANS-level devices.
Is JANS1N4123-1/TR RoHS compliant?
No, JANS1N4123-1/TR is not RoHS compliant. The "e3" suffix denotes RoHS compliance, which is available only on commercial-grade versions (e.g., 1N4123-1e3). JANS-level parts use traditional tin-lead plating to meet MIL-STD-750 solderability and reliability requirements.
What is the maximum reverse leakage current for JANS1N4123-1/TR?
JANS1N4123-1/TR specifies a maximum reverse leakage current (IR) of 0.01 µA at 31.2 V (80% of VZ). This ultra-low leakage supports high-impedance bias networks and minimizes error in precision reference applications where load currents are sub-microampere.
Can JANS1N4123-1/TR be used in surface-mount designs?
JANS1N4123-1/TR uses a DO-35 axial-leaded package and is not designed for direct surface-mount assembly. For SMT implementation, Microsemi offers the functionally equivalent 1N4123US-1 in DO-213AA package-same electrical specs but optimized for reflow soldering and automated placement.
What is the thermal resistance junction-to-lead for JANS1N4123-1/TR?
JANS1N4123-1/TR has a thermal resistance junction-to-lead (RθJL) of 250 °C/W when measured with 3/8 inch (10 mm) lead length from body. This value enables accurate thermal modeling for lead-mounted heatsinking and informs safe operating area calculations in high-power transient conditions.
JANS1N4123-1/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):
- 39 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 200 Ohms
- Current - Reverse Leakage @ Vr:
- 10 nA @ 29.7 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)
JANS1N4123-1/TR FAQ
1.How can I place an order for JANS1N4123-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANS1N4123-1/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 JANS1N4123-1/TR reliable?
The price and inventory of JANS1N4123-1/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANS1N4123-1/TR is usually 5 days.
3.What payment methods are accepted for JANS1N4123-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANS1N4123-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JANS1N4123-1/TR?
JANS1N4123-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANS1N4123-1/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 JANS1N4123-1/TR?
For technical support, including JANS1N4123-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANS1N4123-1/TR requirements.
6.How does Aetrix verify that JANS1N4123-1/TR is sourced from the original manufacturer or authorized distributors?
All JANS1N4123-1/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 JANS1N4123-1/TR meets industry standards.
7.What is the process for return or replacement of JANS1N4123-1/TR?
All JANS1N4123-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANS1N4123-1/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 JANS1N4123-1/TR part is unused and in its original packaging.
Return procedure for JANS1N4123-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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