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Microchip Technology 1N4099-1
- Part No.:
- 1N4099-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N4099-1.pdf
- Description:
- DIODE ZENER 6.8V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:6,085
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Product details
Overview
1N4099-1 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, with 1% voltage tolerance, 200 Ω dynamic impedance at 250 mA test current, and +0.060 %/°C temperature coefficient - used for precision voltage reference in military-grade power supply regulation.
For engineers reviewing the 1N4099-1 datasheet, 1N4099-1 pinout, 1N4099-1 application, or 1N4099-1 equivalent, this page delivers verified electrical parameters, mil-spec qualification status, thermal derating behavior, noise density (40 µV/√Hz), and DO-35 mechanical dimensions - all confirmed from Microsemi T4-LDS-0245-2 Rev. 1.
Technical Context
The 1N4099-1 operates as a reverse-biased Zener regulator with metallurgically bonded junction, enabling stable voltage reference across wide current (250 mA IZT) and temperature (–65 °C to +175 °C) ranges. Its 200 Ω dynamic impedance at 250 mA ensures low output variation under load transients.
It exhibits +0.060 %/°C temperature coefficient - positive and linear - making it suitable for compensated reference designs where predictable drift is required. Noise density is specified at 40 µV/√Hz, measured between 1 kHz–3 kHz at IZT = 250 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 6.8 V ±1% at 250 mA - defines precise regulation point for feedback loops in high-reliability DC-DC converters. |
| Power Dissipation | 500 mW at 25 °C, linearly derated to zero at 175 °C - sets maximum continuous thermal load on PCB traces and heatsinking. |
| Dynamic Impedance ZZT | 200 Ω at 250 mA - determines output voltage deviation under 10% load step changes in regulated supplies. |
| Temperature Coefficient αVZ | +0.060 %/°C - enables predictable, monotonic drift compensation in multi-stage references. |
| Noise Density ND | 40 µV/√Hz (1–3 kHz band) - limits contribution to analog signal chain noise floor in precision instrumentation. |
| Reverse Leakage IR | 1.0 µA at 5.2 V - ensures minimal quiescent current draw in low-power standby circuits. |
| Junction Temp Range | –65 °C to +175 °C - supports operation in aerospace, downhole, and extended-temperature industrial environments. |
Pinout & Package
DO-35 (DO-204AH) hermetically sealed glass axial-leaded package; cathode indicated by black band; tin-lead or RoHS-compliant matte-tin plating; weight ≈ 0.2 g; lead length 25.4–38.1 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or common return; reverse bias applied between cathode and this terminal for regulation. |
| Cathode (banded end) | Zener breakdown terminal / regulated output node | Connected to input voltage source through current-limiting resistor; provides stable 6.8 V reference relative to anode. |
Key Features
| Feature | Design Value |
|---|---|
| Metallurgical bond construction | Enables JANS-level reliability and resistance to thermal cycling-induced failure in space-grade assemblies. |
| MIL-PRF-19500/435 qualification | Validated performance across JAN, JANTX, JANTXV, and JANS reliability levels - traceable lot documentation available. |
| 1% Zener voltage tolerance | Reduces need for post-production trimming in precision voltage references and calibration circuits. |
| Low capacitance (typ. <2 pF) | Minimizes high-frequency coupling into sensitive analog nodes - critical in RF bias and timing circuits. |
| ESD immunity (MIL-STD-750 Method 1020) | Withstands >4 kV HBM without parameter shift - simplifies handling in cleanroom and assembly environments. |
Applications
| Aerospace Power Conditioning | Military Radio Bias Supply |
|---|---|
|
Use Scenario: Regulating reference voltage for ADC/DAC bias in satellite telemetry modules operating at –55 °C to +125 °C. IC Role / Device Role / Timing Role: Zener voltage reference providing stable 6.8 V to op-amp gain-setting networks and SAR ADC internal references. Use Value: JANS qualification and –65 °C to +175 °C junction rating ensure uninterrupted operation during orbital thermal cycling. |
Use Scenario: Generating local 6.8 V bias for RF front-end LNAs and mixer ICs in handheld tactical radios. IC Role / Device Role / Timing Role: Low-noise Zener shunt regulator supplying clean DC to analog RF subsystems with minimal phase noise impact. Use Value: 40 µV/√Hz noise density prevents degradation of receiver sensitivity below –110 dBm. |
| Downhole Sensor Excitation | Industrial PLC Analog Input Reference |
|
Use Scenario: Providing excitation voltage for strain gauge bridges in oil/gas well logging tools exposed to 175 °C ambient. IC Role / Device Role / Timing Role: High-temperature-stable Zener reference maintaining bridge excitation accuracy despite extreme thermal gradients. Use Value: +0.060 %/°C TC enables predictable correction algorithms - eliminating need for external temperature sensors. |
Use Scenario: Serving as primary voltage reference for 16-bit analog input channels in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Precision shunt regulator establishing 6.8 V reference for sigma-delta ADC reference buffers and PGA gain calibration. Use Value: 1% tolerance eliminates factory calibration steps; DO-35 axial leads allow robust through-hole mounting on high-vibration control panels. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4734A | 5% tolerance, 6.8 V, 1 W rating, DO-41 package, no mil-spec qualification | Commercial industrial use only; unsuitable for aerospace or defense due to lack of MIL-PRF-19500/435 validation | Select when cost-sensitive volume production requires higher power but lower reliability assurance. |
| MMBZ5231B | 5% tolerance, 6.8 V, 350 mW SOT-23 surface-mount, no mil-spec, 300 Ω ZZT | Space-constrained PCBs; not rated for >125 °C ambient or radiation environments | Choose for consumer or telecom applications where board area is constrained and military specs are unnecessary. |
Compared with 1N4099-1, the 1N4734A offers higher power but lacks temperature stability and radiation hardness, while the MMBZ5231B trades packaging convenience for reduced noise performance, wider tolerance, and no high-reliability qualification - making 1N4099-1 irreplaceable in JANS-critical systems.
Availability
1N4099-1 is available at Aetrix Electronics and suitable for aerospace power conditioning, military radio bias supply, downhole sensor excitation, and industrial PLC analog input reference requiring stable component supply across extended temperature and radiation environments.
Supply support for 1N4099-1 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) designs high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets.
The 1N4099-1 belongs to Microsemi's legacy MIL-PRF-19500/435-qualified Zener diode family, engineered specifically for voltage reference stability under extreme thermal, radiation, and mechanical stress conditions.
FAQ
What is the Zener voltage tolerance for 1N4099-1?
The 1N4099-1 has a nominal Zener voltage of 6.8 V with ±1% tolerance, as indicated by the "D" suffix in its full nomenclature (1N4099-1D). This tight tolerance is achieved via post-process screening and is validated per MIL-PRF-19500/435 requirements for JANS-level parts.
Is 1N4099-1 RoHS compliant?
Yes, RoHS-compliant versions of 1N4099-1 are available with the "e3" suffix (e.g., 1N4099-1e3), but only for commercial-grade units. JANTXV and JANS variants retain tin-lead plating per MIL-STD-750 and are not RoHS compliant.
What is the maximum Zener current IZM for 1N4099-1?
The maximum Zener current IZM for 1N4099-1 is 40 mA, derived from its 500 mW power rating and 6.8 V Zener voltage (P = V × I → I = 0.5 W / 6.8 V ≈ 73.5 mA), but limited by thermal constraints to 40 mA at 25 °C ambient per the manufacturer's derating curve.
Does 1N4099-1 require a heatsink in standard operation?
No, the 1N4099-1 does not require an external heatsink under standard conditions. Its RθJL = 250 °C/W and RθJA = 300 °C/W allow safe operation at full 500 mW dissipation with 3/8″ lead length and minimal copper pad area - typical axial-lead PCB mounting suffices.
How is polarity marked on the 1N4099-1 DO-35 package?
The 1N4099-1 uses a black cathode band on the glass body to indicate polarity. For proper Zener regulation, the banded (cathode) end must be held at a higher potential than the unbanded (anode) end - reverse biasing the junction to achieve 6.8 V breakdown.
1N4099-1 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):
- 6.8 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 200 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 5.2 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)
1N4099-1 FAQ
1.How can I place an order for 1N4099-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4099-1 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 1N4099-1 reliable?
The price and inventory of 1N4099-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4099-1 is usually 5 days.
3.What payment methods are accepted for 1N4099-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4099-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4099-1?
1N4099-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4099-1 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 1N4099-1?
For technical support, including 1N4099-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4099-1 requirements.
6.How does Aetrix verify that 1N4099-1 is sourced from the original manufacturer or authorized distributors?
All 1N4099-1 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 1N4099-1 meets industry standards.
7.What is the process for return or replacement of 1N4099-1?
All 1N4099-1 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4099-1, 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 1N4099-1 part is unused and in its original packaging.
Return procedure for 1N4099-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4099-1 Tags
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