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Microchip Technology 1N4469DUS/TR
- Part No.:
- 1N4469DUS/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, A
- Datasheet:
-
1N4469DUS/TR.pdf
- Description:
- DIODE ZENER 15V 1.5W D5A
- Quantity:
- Payment:
- Shipping:
Inventory:5,162
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Product details
Overview
1N4469DUS/TR from Microsemi is a hermetically sealed, voidless glass MELF (D-5A) surface-mount Zener diode rated for 1.5 W steady-state power dissipation, with nominal Zener voltage of 15.0 V at 17.0 mA test current, dynamic impedance of 9 Ω at IZT, and maximum reverse leakage of 0.25 µA at 12.0 V. It is qualified to MIL-PRF-19500/406 at JANTXV level and used in high-reliability voltage regulation within aerospace power conditioning circuits.
For engineers reviewing the 1N4469DUS/TR datasheet, 1N4469DUS/TR pinout, 1N4469DUS/TR application, or 1N4469DUS/TR equivalent, this page delivers verified military-grade Zener specifications, thermal derating behavior, junction-to-end-cap thermal resistance, RoHS-compliant commercial variants, and direct alternatives with documented voltage/tolerance/package alignment.
Technical Context
This device operates as a precision shunt voltage regulator in reverse-biased breakdown mode, with Zener voltage specified at IZT = 17.0 mA and guaranteed knee impedance (ZZK) ≤ 600 Ω at IZK. Its internal Category I metallurgical bond ensures mechanical robustness under thermal cycling and shock per MIL-STD-750.
The 1N4469DUS/TR exhibits a temperature coefficient near zero at 15 V (per Figure 1), supports surge current up to 0.95 A (8.3 ms square wave), and maintains stable regulation across –65 °C to +175 °C junction temperature range with RθJEC = 20 °C/W.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage (VZ) | 15.0 V at IZT = 17.0 mA - defines primary regulation setpoint under standard test conditions |
| Zener Tolerance | ±1% - indicated by "D" suffix; enables tight voltage reference design without post-calibration |
| Steady-State Power Dissipation (PD) | 1.5 W @ TA = 25 °C - sets maximum continuous DC power handling before thermal derating applies |
| Dynamic Impedance (ZZT) | 9 Ω @ IZT - determines output voltage variation under load current transients |
| Junction-to-End Cap Thermal Resistance (RθJEC) | 20 °C/W - governs thermal rise from junction to mounting surface; critical for PCB copper pad sizing |
| Maximum Reverse Leakage (IR) | 0.25 µA @ VR = 12.0 V - ensures minimal parasitic current in standby or low-power monitoring circuits |
| Surge Current (IZSM) | 0.95 A @ 8.3 ms square wave - supports transient overvoltage clamping without failure |
Pinout & Package
Package: Hermetically sealed voidless glass MELF (D-5A) case with tungsten slugs; cathode indicated by single polarity band; weight 193 mg; RoHS-compliant matte tin terminations (commercial grade only).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side reference node | Connected to circuit ground or lower potential; carries forward current up to 1.0 A |
| Cathode | Zener breakdown terminal / regulated output node | Connected to voltage source; maintains 15.0 V ±1% relative to anode under reverse bias |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass construction | Eliminates moisture ingress and internal delamination risks in extended-life military deployments |
| Category I internal metallurgical bond | Validated mechanical integrity under MIL-STD-750 Method 2024 (thermal shock) and Method 2002 (mechanical shock) |
| Triple-layer passivation | Prevents surface leakage paths and enhances long-term stability in humid or contaminated environments |
| JANTXV qualification per MIL-PRF-19500/406 | Guarantees screening for burn-in, temperature cycling, and lot acceptance testing required for space-grade applications |
| Non-sensitive to ESD (MIL-STD-750 Method 1020) | Withstands ≥4 kV HBM without parameter shift - simplifies handling and board assembly controls |
Applications
| Avionics Power Monitoring | Satellite Bus Voltage Reference |
|---|---|
Use Scenario: Real-time monitoring of 28 VDC main bus voltage in flight control computers using resistive divider + ADC. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 15.0 V reference point for analog front-end scaling. Use Value: ±1% tolerance and <0.25 µA leakage ensure sub-LSB ADC error contribution across –55 °C to +125 °C operating range. |
Use Scenario: Precision biasing of radiation-hardened op-amps in satellite telemetry signal conditioning modules. IC Role / Device Role / Timing Role: Low-drift Zener reference replacing IC-based references where total ionizing dose >100 krad(Si) is expected. Use Value: Inherent radiation hardness per MicroNote 050 and zero TC near 15 V minimize calibration drift over mission lifetime. |
| Missile Guidance Sensor Biasing | Tactical Radio RF Stage Protection |
Use Scenario: Providing stable bias voltage to MEMS gyroscopes and accelerometers in guided munition inertial measurement units. IC Role / Device Role / Timing Role: Low-noise, high-stability voltage reference maintaining sensor offset accuracy during high-g launch events. Use Value: Voidless glass package and Category I bond withstand 20,000 g shock per MIL-STD-883 Method 2002 without parametric shift. |
Use Scenario: Clamping transient voltages on RF power amplifier bias rails during antenna VSWR fault conditions. IC Role / Device Role / Timing Role: Surge-rated Zener clamp absorbing 0.95 A 8.3 ms surges while holding rail below 16.5 V. Use Value: 1.5 W steady-state rating and 20 °C/W RθJEC enable reliable operation with minimal heatsinking on compact RF PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4469US | Same 15.0 V, 1% tolerance, D-5A package, but commercial-grade (no MIL qualification) | Lacks JANTXV screening; suitable for non-mission-critical industrial systems | Select when full MIL-PRF-19500/406 compliance is not required and cost sensitivity is higher |
| 1N4469CUS/TR | Same 15.0 V, 2% tolerance (C suffix), identical JANTXV qualification and package | Higher voltage uncertainty acceptable in less demanding reference designs | Select when ±2% regulation is sufficient and tighter tolerance adds unnecessary cost |
Compared with 1N4469US and 1N4469CUS/TR, the 1N4469DUS/TR uniquely delivers ±1% Zener voltage accuracy combined with JANTXV-level reliability screening-enabling use in Class S space applications where both precision and survivability are mandatory.
Availability
1N4469DUS/TR is available at Aetrix Electronics and suitable for avionics power monitoring, satellite bus voltage reference, missile guidance sensor biasing, and tactical radio RF stage protection requiring stable component supply across extended temperature and radiation environments.
Supply support for 1N4469DUS/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 analog and mixed-signal components for aerospace, defense, and industrial markets.
The 1N4469DUS/TR belongs to Microsemi's military-qualified Zener diode family designed specifically for voltage regulation in safety-critical systems where failure is not an option-including launch vehicles, orbital platforms, and guided weapons.
FAQ
What is the Zener voltage tolerance of the 1N4469DUS/TR?
The 1N4469DUS/TR has a Zener voltage tolerance of ±1%, as indicated by the "D" suffix in its part number. This tolerance is guaranteed over the full operating temperature range of –65 °C to +175 °C and applies at the specified test current of 17.0 mA. The 1N4469DUS/TR achieves this precision via tight process control and post-screening verification per MIL-PRF-19500/406 requirements.
Is the 1N4469DUS/TR RoHS compliant?
The 1N4469DUS/TR is available in RoHS-compliant versions with matte tin terminations, but only for commercial-grade variants. The JANTXV-qualified 1N4469DUS/TR uses traditional Sn/Pb terminations to meet MIL-PRF-19500/406 solderability and reliability requirements. RoHS compliance is explicitly noted in Microsemi documentation as "e3" suffix option, which is not present in the 1N4469DUS/TR nomenclature.
What does the "US" suffix mean in 1N4469DUS/TR?
The "US" suffix in 1N4469DUS/TR denotes the MELF (D-5A) surface-mount package configuration. It distinguishes this version from through-hole DO-41 variants (e.g., 1N4469). The "TR" indicates tape-and-reel packaging per EIA-481-B, standard for automated SMT placement. The "US" designation is consistent across Microsemi's military Zener series and confirms voidless glass hermetic sealing and tungsten slug construction.
How does the thermal performance of the 1N4469DUS/TR compare to axial-leaded equivalents?
The 1N4469DUS/TR has a junction-to-end-cap thermal resistance (RθJEC) of 20 °C/W, measured directly to its metallized end caps-enabling efficient heat transfer to PCB copper pads. Axial-leaded equivalents like 1N4469 have higher RθJA due to leadframe conduction limitations. This makes the 1N4469DUS/TR more thermally efficient in compact, high-density layouts where airflow is restricted.
Can the 1N4469DUS/TR be used as a replacement for the 1N4469CUS/TR?
Yes, the 1N4469DUS/TR can functionally replace the 1N4469CUS/TR in most circuits, as both share identical package, qualification level (JANTXV), and nominal Zener voltage (15.0 V), differing only in tolerance (±1% vs. ±2%). No PCB layout change is needed. However, the tighter tolerance of the 1N4469DUS/TR may improve system-level accuracy in precision reference applications where the 2% variant was previously marginal.
1N4469DUS/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SQ-MELF, A
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 15 V
- Tolerance:
- ±1%
- Power - Max:
- 1.5 W
- Impedance (Max) (Zzt):
- 9 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 12 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 1 A
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- D-5A
1N4469DUS/TR FAQ
1.How can I place an order for 1N4469DUS/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4469DUS/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 1N4469DUS/TR reliable?
The price and inventory of 1N4469DUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4469DUS/TR is usually 5 days.
3.What payment methods are accepted for 1N4469DUS/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4469DUS/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4469DUS/TR?
1N4469DUS/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4469DUS/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 1N4469DUS/TR?
For technical support, including 1N4469DUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4469DUS/TR requirements.
6.How does Aetrix verify that 1N4469DUS/TR is sourced from the original manufacturer or authorized distributors?
All 1N4469DUS/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 1N4469DUS/TR meets industry standards.
7.What is the process for return or replacement of 1N4469DUS/TR?
All 1N4469DUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4469DUS/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 1N4469DUS/TR part is unused and in its original packaging.
Return procedure for 1N4469DUS/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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