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Microchip Technology 1N4119-1
- Part No.:
- 1N4119-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N4119-1.pdf
- Description:
- DIODE ZENER 28V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:2,961
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Product details
Overview
1N4119-1 from Microsemi is a 500 mW, 28.0 V metallurgically bonded glass Zener diode in DO-35 (DO-204AH) package, qualified to JANS level per MIL-PRF-19500/435, with ±5% voltage tolerance, 200 Ω dynamic impedance at 250 mA, and 0.01 µA max reverse leakage at 21.3 V. It delivers stable voltage regulation in high-reliability power supply reference circuits.
For engineers reviewing the 1N4119-1 datasheet, 1N4119-1 pinout, 1N4119-1 application, or 1N4119-1 equivalent, this page provides verified Zener voltage, temperature coefficient (+0.095 %/°C), noise density (1 µV/√Hz), junction temperature range (–65 to +175 °C), and military qualification level - all critical for aerospace, defense, and industrial analog design.
Technical Context
The 1N4119-1 operates as a precision shunt voltage regulator in reverse-biased breakdown mode, with Zener test current fixed at 250 mA and specified dynamic impedance measured at 10% AC modulation superimposed on IZT. Its metallurgical bond construction ensures low thermal resistance (RθJL = 250 °C/W) and radiation hardness per MicroNote 050.
It exhibits a positive temperature coefficient of +0.095 %/°C, indicating increasing Zener voltage with rising temperature - a key behavior for thermal drift compensation in reference designs. Noise density is rated at 1 µV/√Hz, confirming suitability for low-noise analog references where signal integrity is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 28.0 V at 250 mA - defines precise regulation point for feedback networks |
| Power Dissipation | 500 mW at 25 °C - sets maximum continuous DC power handling before derating |
| Dynamic Impedance ZZT | 200 Ω at 250 mA - determines output impedance and load regulation sensitivity |
| Reverse Leakage IR | 0.01 µA at 21.3 V - ensures minimal error current in high-impedance bias networks |
| Temp. Coefficient αVZ | +0.095 %/°C - quantifies voltage drift over –65 to +175 °C operating range |
| Noise Density ND | 1 µV/√Hz - enables use in low-noise voltage references without added filtering |
| Junction Temp. Range | –65 to +175 °C - supports operation in extended environmental conditions including space-grade systems |
Pinout & Package
DO-35 (DO-204AH) axial-leaded hermetically sealed glass package; cathode indicated by 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 lower-potential rail in shunt regulator topology |
| Cathode | Zener regulation output | Provides stabilized 28.0 V output when reverse-biased; marked with band |
Key Features
| Feature | Design Value |
|---|---|
| Metallurgical bond construction | Enables JANS-level reliability and radiation hardness per MIL-PRF-19500/435 |
| Low noise density | 1 µV/√Hz - minimizes contribution to system noise floor in precision references |
| Hermetic glass sealing | Prevents moisture ingress and long-term parameter drift in harsh environments |
| ESD immunity | Non-sensitive per MIL-STD-750 Method 1020 - eliminates need for external ESD protection |
| Flexible mounting | Axial leads support through-hole PCB mounting or point-to-point wiring in ruggedized assemblies |
Applications
| Avionics Power Reference | Spacecraft Voltage Monitor |
|---|---|
Use Scenario: Regulating reference voltage for ADCs and DACs in flight control computers. IC Role / Device Role / Timing Role: Shunt Zener reference providing stable 28.0 V bias for analog front-end circuitry. Use Value: JANS qualification and –65 to +175 °C operation ensure reliability across atmospheric re-entry thermal cycles. | Use Scenario: Monitoring bus voltage in satellite power distribution units. IC Role / Device Role / Timing Role: Precision shunt regulator enabling accurate voltage threshold detection. Use Value: Radiation-hardened metallurgical bond prevents parametric shift under total ionizing dose exposure. |
| Military Radar Bias Supply | Industrial PLC Analog Input |
Use Scenario: Generating stable bias for GaAs FET amplifiers in ground-based radar transceivers. IC Role / Device Role / Timing Role: Low-noise 28.0 V reference source for RF amplifier bias networks. Use Value: 1 µV/√Hz noise density avoids modulation sidebands that degrade radar SNR. | Use Scenario: Providing regulated excitation voltage for 4–20 mA current loop sensors. IC Role / Device Role / Timing Role: Zener shunt regulator maintaining constant sensor supply despite line fluctuations. Use Value: 200 Ω dynamic impedance ensures <±0.5% regulation error over 1–10 mA load variation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4119UR-1 | Same electrical specs; DO-213AA surface-mount package instead of DO-35 | Requires SMT assembly; no axial lead mounting option | Select when board space is constrained and reflow compatibility is required |
| 1N4119-1e3 | Identical DO-35 package and electrical performance; RoHS-compliant matte-tin plating | Not qualified to JAN/JANTX/JANTXV/JANS levels; commercial-grade only | Select for cost-sensitive industrial applications where military qualification is unnecessary |
Compared with 1N4119UR-1 and 1N4119-1e3, the 1N4119-1 offers full MIL-PRF-19500/435 qualification up to JANS level in axial-leaded form - making it the sole choice for legacy through-hole designs requiring radiation-hardened, high-reliability Zener regulation.
Availability
1N4119-1 is available at Aetrix Electronics and suitable for avionics power reference, spacecraft voltage monitor, and military radar bias supply requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 1N4119-1 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, radiation-hardened, and aerospace-grade components.
The 1N4119-1 belongs to Microsemi's legacy MIL-qualified Zener diode family designed specifically for precision voltage regulation in mission-critical defense, space, and industrial systems where long-term stability and environmental resilience are mandatory.
FAQ
What is the Zener voltage tolerance for the 1N4119-1?
The 1N4119-1 has a nominal Zener voltage of 28.0 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 the 1N4119-1 qualified to JANS level?
Yes, the 1N4119-1 is qualified to JANS level per MIL-PRF-19500/435, as explicitly stated in the DESCRIPTION section on page 1 of the datasheet. This qualification confirms its suitability for spaceflight and other ultra-high-reliability applications requiring full radiation hardness and extended temperature validation.
What is the maximum reverse leakage current for the 1N4119-1?
The 1N4119-1 has a maximum reverse leakage current (IR) of 0.01 µA at 21.3 V, as specified in the Electrical Characteristics table on page 3. This ultra-low leakage supports high-impedance bias networks and precision reference designs where error current must be minimized.
Does the 1N4119-1 have a RoHS-compliant version?
Yes - the RoHS-compliant version is designated 1N4119-1e3, which uses annealed matte-tin plating and is available in commercial grade only. Per the datasheet, JANTX/JANTXV/JANS versions remain non-RoHS compliant due to tin-lead plating requirements for military reliability.
What is the thermal resistance from junction to lead for the 1N4119-1?
The 1N4119-1 has a thermal resistance from junction to lead (RθJL) of 250 °C/W when mounted with 3/8 inch (10 mm) lead length from body, as listed in the Maximum Ratings table on page 1. This value supports thermal modeling for power dissipation in high-reliability mechanical layouts.
1N4119-1 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):
- 28 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 200 Ohms
- Current - Reverse Leakage @ Vr:
- 10 nA @ 21.3 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AH (DO-35)
1N4119-1 FAQ
1.How can I place an order for 1N4119-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4119-1 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 1N4119-1 reliable?
The price and inventory of 1N4119-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4119-1 is usually 5 days.
3.What payment methods are accepted for 1N4119-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4119-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4119-1?
1N4119-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4119-1 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 1N4119-1?
For technical support, including 1N4119-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4119-1 requirements.
6.How does Aetrix verify that 1N4119-1 is sourced from the original manufacturer or authorized distributors?
All 1N4119-1 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 1N4119-1 meets industry standards.
7.What is the process for return or replacement of 1N4119-1?
All 1N4119-1 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4119-1, 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 1N4119-1 part is unused and in its original packaging.
Return procedure for 1N4119-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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