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Microchip Technology 1N4099
- Part No.:
- 1N4099
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
1N4099.pdf
- Description:
- DIODE ZENER
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
1N4099 from Microsemi is a 500 mW, 6.8 V Zener voltage regulator diode in DO-35 glass axial-leaded package, qualified to JANS level per MIL-PRF-19500/435. It delivers 250 mA test current, 200 Ω dynamic impedance at IZT, and +0.060 %/°C temperature coefficient for precision low-voltage regulation in high-reliability analog power supplies.
For engineers reviewing the 1N4099 datasheet, 1N4099 pinout, 1N4099 application, or 1N4099 equivalent, this part supports critical voltage reference design in aerospace power conditioning, radiation-hardened instrumentation, and military-grade analog signal chains where stable 6.8 V regulation under wide temperature and current variation is required.
Technical Context
The 1N4099 operates as a reverse-biased Zener diode with metallurgically bonded junction for enhanced reliability and low noise density (40 µV/√Hz at 6.8 V). Its breakdown behavior is characterized at 250 mA test current with tight 5% nominal voltage tolerance and specified dynamic impedance of 200 Ω at IZT.
It features hermetic glass DO-35 packaging, cathode band polarity marking, and thermal resistance of 250 °C/W junction-to-lead (at 10 mm lead length), enabling stable operation across -65 °C to +175 °C junction temperature range with linear derating above 50 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 6.8 V at 250 mA - precise reference point for low-voltage regulation circuits |
| Power Dissipation | 500 mW at 25 °C - defines maximum continuous DC power handling before thermal derating |
| Zener Impedance ZZT | 200 Ω at IZT = 250 mA - determines output voltage stability under load current variation |
| Temp Coefficient αVZ | +0.060 %/°C - quantifies voltage drift over temperature; enables compensation in precision references |
| Noise Density ND | 40 µV/√Hz at 6.8 V - specifies broadband RMS noise contribution in sensitive analog front-ends |
| Max Reverse Current IR | 1.0 µA at VR = 5.2 V - defines leakage threshold before entering regulation region |
| Junction Temp Range | -65 °C to +175 °C - supports operation in extreme environments including space and avionics |
Pinout & Package
DO-35 (DO-204AH) glass axial-leaded package with hermetically sealed construction, tin-lead or RoHS-compliant matte-tin plating, and cathode indicated by color band. Leads are solderable per MIL-STD-750 method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower-potential node; reverse bias applied to cathode for regulation |
| Cathode | Zener regulation terminal / voltage reference output | Banded end; connected to unregulated input; provides stable 6.8 V output referenced to anode |
Key Features
| Feature | Design Value |
|---|---|
| Metallurgical bond construction | Enables JANS-level qualification and long-term parameter stability under thermal cycling and radiation exposure |
| Low noise density | 40 µV/√Hz at 6.8 V supports use in precision ADC references and low-noise op-amp biasing |
| MIL-PRF-19500/435 qualification | Validated reliability up to JANS level ensures suitability for flight-critical and defense electronics |
| Hermetic glass DO-35 package | Prevents moisture ingress and parameter shift over time; maintains specification integrity for >20-year deployments |
Applications
| Aerospace Power Conditioning | Military Analog Signal Chain |
|---|---|
Use Scenario: Regulating auxiliary 6.8 V rail in satellite power management units exposed to thermal vacuum and radiation. IC Role / Device Role / Timing Role: Zener voltage reference diode providing stable bias for DC-DC controller feedback networks. Use Value: JANS qualification and -65 °C to +175 °C operation ensure uninterrupted regulation during orbital thermal cycling. | Use Scenario: Precision voltage reference in field-deployable radar receiver front-end calibration circuitry. IC Role / Device Role / Timing Role: Low-noise 6.8 V reference source for analog-to-digital converter (ADC) reference buffers. Use Value: 40 µV/√Hz noise density minimizes quantization error in 16-bit+ data acquisition systems. |
| Radiation-Hardened Instrumentation | High-Reliability Industrial Control |
Use Scenario: Voltage stabilization in nuclear reactor monitoring sensors operating in high-total-ionizing-dose environments. IC Role / Device Role / Timing Role: Radiation-tolerant Zener regulator maintaining reference integrity without parameter shift. Use Value: Inherent radiation hardness per MicroNote 050 eliminates need for shielding or redundancy overhead. | Use Scenario: Overvoltage protection and clamping in programmable logic controller (PLC) analog input modules. IC Role / Device Role / Timing Role: Zener clamp limiting input transients to protect downstream op-amps and ADCs. Use Value: 500 mW power rating and 200 Ω ZZT enable robust transient energy absorption without thermal runaway. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4734A | 6.8 V, 1 W, DO-41 package, ±5% tolerance, 10 Ω ZZT, no MIL qualification | Higher power but non-hermetic plastic package; unsuitable for radiation or extended temperature use | Select when cost-sensitive commercial designs require higher power and relaxed reliability |
| 1N5231B | 6.2 V, 500 mW, DO-35, ±5%, 17 Ω ZZT, no MIL qualification, different VZ | Lower voltage reference; lacks JANS qualification and radiation hardness documentation | Select only if 6.2 V matches system requirement and military-grade reliability is not needed |
Compared with 1N4099, the 1N4734A offers higher power but sacrifices hermeticity and radiation tolerance, while the 1N5231B provides tighter ZZT but fails to meet the 6.8 V target and lacks MIL-qualified reliability-making 1N4099 uniquely suited for mission-critical 6.8 V reference needs.
Availability
1N4099 is available at Aetrix Electronics and suitable for aerospace power conditioning, military analog signal chain, radiation-hardened instrumentation, and high-reliability industrial control requiring stable component supply across extended temperature and radiation environments.
Supply support for 1N4099 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 1N4099 belongs to Microsemi's legacy MIL-PRF-19500/435 qualified Zener diode product line, engineered specifically for voltage reference and regulation in defense, space, and nuclear instrumentation systems.
FAQ
What is the Zener voltage and test current for the 1N4099?
The 1N4099 has a nominal Zener voltage of 6.8 V measured at a Zener test current (IZT) of 250 mA. This value is specified under thermal equilibrium at 25 °C ambient and reflects the device's primary regulation point in precision reference applications.
Is the 1N4099 suitable for high-reliability aerospace applications?
Yes, the 1N4099 is qualified to JANS level per MIL-PRF-19500/435 and features hermetic DO-35 packaging, metallurgical bonding, and inherent radiation hardness documented in Microsemi MicroNote 050-making it appropriate for flight-critical and satellite power systems.
What is the maximum reverse leakage current for the 1N4099?
The 1N4099 exhibits a maximum reverse current (IR) of 1.0 µA at a reverse voltage (VR) of 5.2 V. This low leakage ensures minimal power loss and stable regulation onset near the 6.8 V breakdown threshold.
Does the 1N4099 have a specified noise density?
Yes, the 1N4099 has a maximum noise density (ND) of 40 µV/√Hz at 6.8 V and IZT = 250 mA, measured in the 1 kHz–3 kHz band. This value is critical for low-noise analog reference design in precision measurement systems.
What is the thermal resistance and derating behavior of the 1N4099?
The 1N4099 has a junction-to-lead thermal resistance (RθJL) of 250 °C/W at 10 mm lead length. Its 500 mW power rating linearly derates to zero between 50 °C and 175 °C lead temperature, ensuring safe operation under sustained thermal stress.
1N4099 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- -
- Tolerance:
- -
- Power - Max:
- -
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- -
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
1N4099 FAQ
1.How can I place an order for 1N4099 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4099 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 1N4099 reliable?
The price and inventory of 1N4099 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4099 is usually 5 days.
3.What payment methods are accepted for 1N4099?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4099 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4099?
1N4099 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4099 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 1N4099?
For technical support, including 1N4099 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4099 requirements.
6.How does Aetrix verify that 1N4099 is sourced from the original manufacturer or authorized distributors?
All 1N4099 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 1N4099 meets industry standards.
7.What is the process for return or replacement of 1N4099?
All 1N4099 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4099, 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 1N4099 part is unused and in its original packaging.
Return procedure for 1N4099:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4099 Tags
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