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Microchip Technology 1N4099/TR
- Part No.:
- 1N4099/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AA, DO-7, Axial
- Datasheet:
-
1N4099/TR.pdf
- Description:
- DIODE ZENER 6.8V 500MW DO7
- Quantity:
- Payment:
- Shipping:
Inventory:9,867
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Product details
Overview
1N4099/TR from Microsemi is a 500 mW, 6.8 V axial-leaded Zener diode in DO-35 (DO-204AH) glass package, qualified to JANTXV level per MIL-PRF-19500/435. It delivers 200 Ω dynamic impedance at 250 mA test current, 1.0 µA max reverse leakage at 5.2 V, and +0.060 %/°C temperature coefficient - used for precision voltage reference and regulation in military-grade power supplies.
For engineers reviewing the 1N4099/TR datasheet, 1N4099/TR pinout, 1N4099/TR application, or 1N4099/TR equivalent, key selection criteria include its 6.8 V nominal Zener voltage, 5% tolerance (standard), metallurgically bonded construction, low noise density (40 µV/√Hz), and hermetic DO-35 packaging for high-reliability analog and aerospace systems.
Technical Context
This device operates as a two-terminal voltage regulator in reverse-biased breakdown mode, with Zener voltage stabilized across wide current (0.25–75 mA) and temperature (−65°C to +175°C) ranges. Its metallurgical bond ensures mechanical robustness and long-term stability under thermal cycling and radiation exposure.
The 1N4099/TR exhibits a positive temperature coefficient (+0.060 %/°C), making it suitable for temperature-compensated reference designs when paired with negative-coefficient devices. Its 200 Ω dynamic impedance at IZT = 250 mA and 1.0 µA IR at VR = 5.2 V define regulation accuracy and load-line sensitivity in feedback networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 6.8 V at 250 mA - defines stable regulation point for biasing, reference, and clamping circuits |
| Power Dissipation | 500 mW at 25°C - sets maximum continuous DC power handling before thermal derating begins at 50°C |
| Dynamic Impedance ZZT | 200 Ω at 250 mA - determines output voltage variation under changing load current |
| Reverse Leakage IR | 1.0 µA at 5.2 V - ensures minimal error current in high-impedance reference paths |
| Temp. Coefficient αVZ | +0.060 %/°C - enables predictable drift compensation in precision analog systems |
| Noise Density ND | 40 µV/√Hz - limits added broadband noise in low-noise voltage references and sensor front-ends |
| Junction Temp. Range | −65°C to +175°C - supports operation in extended-environment avionics, downhole, and space-qualified electronics |
Pinout & Package
Hermetically sealed axial-leaded DO-35 (DO-204AH) glass package with cathode band marking. Leads are tin-lead or RoHS-compliant matte-tin plated, solderable per MIL-STD-750 Method 2026. Weight ≈ 0.2 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower-potential node; reverse voltage applied between cathode and anode to activate regulation |
| Cathode | Zener breakdown terminal / regulated output node | Banded end; connects to unregulated input rail; provides stable 6.8 V relative to anode under reverse bias |
Key Features
| Feature | Design Value |
|---|---|
| Metallurgical bond construction | Eliminates interfacial delamination risk under thermal shock and vibration, critical for MIL-spec reliability |
| JANTXV qualification | Validated to MIL-PRF-19500/435 Level JANTXV - includes screening for burn-in, temperature cycling, and hermeticity |
| Low capacitance | Typical <1.5 pF (per Figure 3) - preserves high-frequency response in RF detector and fast-switching clamp applications |
| Radiation hardness | Inherently tolerant to total ionizing dose (TID) per MicroNote 050 - suitable for space and nuclear environments |
| ESD immunity | Non-sensitive per MIL-STD-750 Method 1020 - withstands handling without protection circuitry |
Applications
| Avionics Power Reference | Military Radio Biasing |
|---|---|
Use Scenario: Stable 6.8 V reference for ADC voltage reference and op-amp biasing in airborne navigation computers. IC Role / Device Role / Timing Role: Two-terminal Zener reference providing fixed potential against which analog signals are measured. Use Value: JANTXV qualification and −65°C to +175°C operation ensure uninterrupted function during rapid cabin pressure and temperature transients. | Use Scenario: Regulated bias supply for RF power amplifier stages in handheld tactical radios. IC Role / Device Role / Timing Role: Voltage clamp protecting amplifier input from transient overvoltage while maintaining DC operating point. Use Value: 200 Ω ZZT and 1.0 µA IR minimize loading on sensitive bias networks and preserve gain stability across temperature. |
| Satellite Sensor Calibration | Nuclear Instrumentation |
Use Scenario: Precision voltage reference for calibration of radiation-detection photodiode amplifiers aboard LEO satellites. IC Role / Device Role / Timing Role: Low-noise (40 µV/√Hz), radiation-hardened Zener establishing traceable measurement baseline. Use Value: Inherent TID hardness and stable +0.060 %/°C coefficient enable recalibration-free operation over multi-year missions. | Use Scenario: Overvoltage protection and reference stabilization in neutron flux monitoring systems deployed in reactor containment zones. IC Role / Device Role / Timing Role: Hermetic DO-35 package and metallurgical bond ensure integrity under high gamma dose rates and thermal cycling. Use Value: −65°C to +175°C range and MIL-qualified screening support continuous operation in extreme ambient conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4099US | Same electrical specs; surface-mount DO-213AA package instead of axial DO-35 | Requires PCB rework for SMT assembly; eliminates through-hole mounting and lead-forming steps | Select when automated placement and board space reduction are prioritized over legacy through-hole compatibility |
| 1N4099UR-1 | Identical Zener parameters; DO-216 tabbed SMT package with different footprint and thermal path | Higher thermal resistance than DO-35; suited for lower-power-density layouts where lead length affects cooling | Choose for compact industrial controls where tabbed leads simplify mechanical anchoring and reduce board stress |
Compared with 1N4099US and 1N4099UR-1, the 1N4099/TR offers proven axial-leaded reliability, superior thermal dissipation via 3/8″ lead length (RθJL = 250°C/W), and direct compatibility with legacy military harness and connector interfaces.
Availability
1N4099/TR is available at Aetrix Electronics and suitable for avionics power reference, military radio biasing, and satellite sensor calibration requiring stable component supply, long-lifecycle assurance, and MIL-spec traceability.
Supply support for 1N4099/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) is a U.S.-based semiconductor company specializing in high-reliability, radiation-hardened, and defense-grade analog and mixed-signal components.
The 1N4099/TR belongs to Microsemi's legacy MIL-PRF-19500/435-qualified Zener diode family, engineered for precision voltage regulation in mission-critical aerospace, defense, and nuclear instrumentation systems.
FAQ
What is the Zener voltage tolerance for 1N4099/TR?
The 1N4099/TR has a standard ±5% Zener voltage tolerance at 25°C, per JEDEC registration and MIL-PRF-19500/435 specification. This tolerance applies to the nominal 6.8 V rating, yielding a guaranteed VZ range of 6.46 V to 7.14 V under specified test conditions (IZT = 250 mA). Tighter tolerances (±2%, ±1%) are available under different part number suffixes but not for the TR-suffixed commercial version.
Is 1N4099/TR RoHS compliant?
Yes, the 1N4099/TR is RoHS compliant, indicated by the "e3" suffix in its full qualified nomenclature (e.g., 1N4099-1e3/TR). RoHS compliance applies only to commercial-grade versions; MIL-spec variants (JAN, JANTX, JANTXV, JANS) retain leaded terminations per qualification requirements. The matte-tin plating meets Solderability per MIL-STD-750 Method 2026.
What is the maximum reverse leakage current for 1N4099/TR?
The maximum reverse leakage current (IR) for 1N4099/TR is 1.0 µA at a reverse voltage (VR) of 5.2 V and ambient temperature of 25°C. This value is specified in the Electrical Characteristics table on page 3 of the T4-LDS-0245-2 datasheet and reflects the device's ability to maintain regulation integrity with minimal parasitic current in high-impedance reference nodes.
Does 1N4099/TR require derating above 25°C?
Yes, 1N4099/TR requires linear derating of its 500 mW power rating starting at 25°C ambient (on typical FR4 board) or 50°C lead temperature (TL), reaching zero dissipation at 175°C. Derating follows a slope of −6.25 mW/°C above 25°C ambient, as shown in Figure 2 of the datasheet - critical for thermal design in enclosed or high-temperature enclosures.
What does the "TR" suffix mean in 1N4099/TR?
"TR" denotes tape-and-reel packaging per EIA-296 standard, enabling automated pick-and-place assembly. The base part 1N4099 refers to the commercial-grade, 5% tolerance, DO-35 packaged Zener diode; adding "TR" specifies reel packaging (typically 2,000 units per reel). This suffix does not affect electrical or reliability specifications - the 1N4099/TR retains identical Zener voltage, impedance, and thermal characteristics as bulk 1N4099.
1N4099/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AA, DO-7, Axial
- Packaging:
- Tape & Reel (TR)
- 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:
- 10 µA @ 5.17 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-7 (DO-204AA)
1N4099/TR FAQ
1.How can I place an order for 1N4099/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4099/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 1N4099/TR reliable?
The price and inventory of 1N4099/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4099/TR is usually 5 days.
3.What payment methods are accepted for 1N4099/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4099/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4099/TR?
1N4099/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4099/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 1N4099/TR?
For technical support, including 1N4099/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4099/TR requirements.
6.How does Aetrix verify that 1N4099/TR is sourced from the original manufacturer or authorized distributors?
All 1N4099/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 1N4099/TR meets industry standards.
7.What is the process for return or replacement of 1N4099/TR?
All 1N4099/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4099/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 1N4099/TR part is unused and in its original packaging.
Return procedure for 1N4099/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4099/TR Tags
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