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Microchip Technology JANTX1N4118-1
- Part No.:
- JANTX1N4118-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
JANTX1N4118-1.pdf
- Description:
- DIODE ZENER 27V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:5,580
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Product details
Overview
JANTX1N4118-1 from Microsemi is a 500 mW, 27.0 V ±5% metallurgically bonded glass Zener diode in DO-35 package, qualified to MIL-PRF-19500/435 JANTX level for high-reliability voltage regulation. It delivers 20.5 mA maximum Zener current at 27 V with 150 Ω dynamic impedance and +0.090 %/°C temperature coefficient, used in precision reference and power supply feedback circuits.
For engineers reviewing the JANTX1N4118-1 datasheet, JANTX1N4118-1 pinout, JANTX1N4118-1 application, or JANTX1N4118-1 equivalent, key selection criteria include its MIL-qualified reliability grade, low noise density (1 µV/√Hz), hermetic DO-35 packaging, and stable regulation across -65 °C to +175 °C junction temperature range.
Technical Context
This Zener diode operates in reverse breakdown with cathode-banded polarity, requiring the banded end to be held positive relative to the anode for regulation. Its metallurgical bond ensures mechanical robustness and long-term stability under thermal cycling and radiation exposure.
It exhibits a typical capacitance of 14 pF at 27 V (per Figure 3), minimal leakage (≤0.01 µA at 20.5 V), and linear power derating from 500 mW at 25 °C to zero at 175 °C ambient on standard FR4 board - critical for aerospace and defense power conditioning designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 27.0 V ±5% at 250 mA test current - defines precise regulation point for feedback loops |
| Power Dissipation | 500 mW at 25 °C, derated linearly to zero at 175 °C - sets thermal design margin for PCB layout |
| Dynamic Impedance ZZT | 150 Ω at 250 mA - determines output voltage variation under load transients |
| Reverse Leakage IR | ≤0.01 µA at 20.5 V - ensures negligible error current in high-impedance reference nodes |
| Noise Density | 1 µV/√Hz - enables low-noise analog references in precision instrumentation |
| Temp Coefficient αVZ | +0.090 %/°C - quantifies drift magnitude over operating temperature range |
| Junction Temp Range | -65 °C to +175 °C - supports operation in extreme environmental conditions |
Pinout & Package
DO-35 (DO-204AH) axial-leaded hermetically sealed glass package. Cathode indicated by color band; banded end is positive during Zener operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Reference ground node | Connected to circuit common; forms return path for Zener current |
| Cathode (banded end) | Regulated output node | Provides stable 27 V reference when reverse biased above breakdown |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/435 JANTX qualification | Validated reliability for aerospace and military systems with full traceability and screening |
| Metallurgical bond construction | Eliminates interfacial delamination risk under thermal shock and vibration stress |
| Hermetic glass encapsulation | Prevents moisture ingress and parameter drift over decades of field operation |
| Low noise density (1 µV/√Hz) | Enables use in high-resolution ADC references and low-phase-noise oscillator biasing |
| Radiation hardness | Inherently tolerant to total ionizing dose per Microsemi MicroNote 050 - suitable for space-qualified designs |
Applications
| Aerospace Power Conditioning | Defense System Reference |
|---|---|
Use Scenario: Regulating auxiliary 27 V rail in satellite power distribution units where voltage stability must hold across wide thermal swings. IC Role / Device Role / Timing Role: Zener diode providing primary voltage reference for DC-DC converter feedback loop. Use Value: JANTX1N4118-1's +0.090 %/°C tempco and -65 °C to +175 °C operation ensure ≤±1.2% output deviation over orbital temperature extremes. | Use Scenario: Precision biasing of RF front-end amplifiers in radar receivers requiring ultra-low-noise DC supplies. IC Role / Device Role / Timing Role: Low-noise Zener reference source for active bias networks. Use Value: 1 µV/√Hz noise density prevents degradation of receiver noise figure below 0.5 dB. |
| Industrial Control Loop Reference | Nuclear Instrumentation Calibration |
Use Scenario: Generating stable 27 V reference for 4–20 mA transmitter calibration circuits in oil & gas process controllers. IC Role / Device Role / Timing Role: Primary voltage standard in metrology-grade calibration fixtures. Use Value: Hermetic DO-35 package and MIL-qualified screening guarantee long-term drift <50 ppm/year under continuous operation. | Use Scenario: Biasing photomultiplier tube (PMT) dynode chains in radiation detection equipment requiring stable high-voltage references. IC Role / Device Role / Timing Role: Radiation-hardened Zener element in multi-stage HV divider networks. Use Value: Inherent radiation tolerance eliminates need for shielding or derating in gamma-rich environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4118US (Microchip) | Same 27 V nominal, DO-35 package, but commercial-grade only (no MIL qualification) | Lacks JANTX screening, not approved for flight-critical or defense programs | Select when cost sensitivity outweighs reliability requirements and radiation tolerance is unnecessary |
| JANTXV1N4118-1 (Microsemi) | Identical electrical specs, but qualified to higher JANTXV level with extended screening and tighter lot controls | Required for Class S space applications and mission-critical avionics where failure modes must be statistically bounded | Select when program mandates JANTXV-level assurance or operates in >100 krad(Si) TID environments |
Compared with JANTX1N4118-1, the 1N4118US offers identical regulation performance at lower cost but no military screening, while JANTXV1N4118-1 adds enhanced process controls and radiation validation - making it suitable for higher assurance tiers without changing circuit design or layout.
Availability
JANTX1N4118-1 is available at Aetrix Electronics and suitable for aerospace power conditioning, defense system reference, and industrial control loop reference requiring stable component supply with full traceability and long-lifecycle support.
Supply support for JANTX1N4118-1 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 and mixed-signal components for aerospace, defense, and industrial markets.
The JANTX1N4118-1 belongs to Microsemi's legacy MIL-qualified Zener diode family, engineered specifically for voltage reference stability, radiation tolerance, and long-term parametric consistency in safety-critical systems.
FAQ
What is the Zener voltage tolerance for JANTX1N4118-1?
JANTX1N4118-1 has a nominal Zener voltage of 27.0 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 thermal equilibrium at 25 °C with 250 mA test current.
Is JANTX1N4118-1 RoHS compliant?
No, JANTX1N4118-1 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 is available only on commercial-grade versions. JANTX1N4118-1 carries no RoHS suffix and uses tin-lead plating per MIL-STD-750.
What is the maximum Zener current for JANTX1N4118-1?
The maximum Zener current (IZM) for JANTX1N4118-1 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 reaches its rated 500 mW power dissipation at 27 V.
Does JANTX1N4118-1 require heatsinking in standard PCB layouts?
No, JANTX1N4118-1 does not require external heatsinking under typical operating conditions. Its thermal resistance junction-to-ambient is 300 °C/W on FR4 with 4 mm² copper pads, and power derating begins only above 50 °C lead temperature - sufficient for most through-hole mounted applications at ≤500 mW.
How is polarity marked on JANTX1N4118-1?
JANTX1N4118-1 uses a cathode band marking per the Mechanical and Packaging section on page 2 of T4-LDS-0245-2 Rev. 1. The banded end is the cathode and must be held positive relative to the unbanded (anode) end during Zener regulation operation.
JANTX1N4118-1 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):
- 27 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 150 Ohms
- Current - Reverse Leakage @ Vr:
- 10 nA @ 20.5 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)
JANTX1N4118-1 FAQ
1.How can I place an order for JANTX1N4118-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTX1N4118-1 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 JANTX1N4118-1 reliable?
The price and inventory of JANTX1N4118-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTX1N4118-1 is usually 5 days.
3.What payment methods are accepted for JANTX1N4118-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANTX1N4118-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JANTX1N4118-1?
JANTX1N4118-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANTX1N4118-1 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 JANTX1N4118-1?
For technical support, including JANTX1N4118-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTX1N4118-1 requirements.
6.How does Aetrix verify that JANTX1N4118-1 is sourced from the original manufacturer or authorized distributors?
All JANTX1N4118-1 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 JANTX1N4118-1 meets industry standards.
7.What is the process for return or replacement of JANTX1N4118-1?
All JANTX1N4118-1 units undergo pre-shipment inspection (PSI). If there is an issue with JANTX1N4118-1, 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 JANTX1N4118-1 part is unused and in its original packaging.
Return procedure for JANTX1N4118-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
JANTX1N4118-1 Tags
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