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Microchip Technology 1N4465DUS
- Part No.:
- 1N4465DUS
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, A
- Datasheet:
-
1N4465DUS.pdf
- Description:
- DIODE ZENER 10V 1.5W D5A
- Quantity:
- Payment:
- Shipping:
Inventory:9,868
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Product details
Overview
1N4465DUS from Microsemi is a military-qualified, hermetically sealed MELF surface-mount Zener diode with nominal 10.0 V Zener voltage, 25 mA test current (IZT), ±1% tolerance (denoted by 'D' suffix), 1.5 W power rating, and voidless glass construction for high-reliability voltage regulation in aerospace and defense systems.
For engineers reviewing the 1N4465DUS datasheet, 1N4465DUS pinout, 1N4465DUS application, or 1N4465DUS equivalent, this part delivers precise low-tolerance Zener regulation in harsh environments - critical for analog reference, overvoltage protection, and biasing circuits where long-term stability and radiation hardness are required.
Technical Context
This device operates as a two-terminal voltage reference diode, conducting in reverse breakdown at its specified VZ of 10.0 V with dynamic impedance ZZT ≤ 5 Ω at IZT = 25 mA and knee impedance ZZK ≤ 500 Ω at IZK. Its junction temperature range spans −65 °C to +175 °C, supporting operation in extreme thermal conditions.
Thermal resistance from junction to end cap is 20 °C/W, enabling stable 1.5 W dissipation at 25 °C ambient. It features triple-layer passivation, Category I metallurgical bonds, and meets MIL-PRF-19500/406 for JAN/JANTXV reliability levels - confirming suitability for mission-critical embedded power conditioning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 10.0 V ±1% - tight tolerance enables precision reference generation without external trimming. |
| Test Current (IZT) | 25 mA - defines operating point where VZ and ZZT are guaranteed per spec. |
| Dynamic Impedance (ZZT) | ≤5 Ω @ IZT - ensures minimal output voltage variation under load current changes. |
| Max Reverse Current (IR) | ≤0.25 µA @ VR = 8.0 V - guarantees low leakage in high-impedance bias networks. |
| Power Dissipation (PD) | 1.5 W @ TA = 25 °C - supports robust regulation in compact surface-mount layouts. |
| Junction Temp Range | −65 °C to +175 °C - validated for extended operation in avionics, space, and downhole electronics. |
| Forward Voltage (VF) | 1.0 V @ 200 mA - defines forward conduction threshold for polarity-sensitive circuit protection. |
Pinout & Package
Package: A (D-5A) MELF - hermetically sealed voidless glass case with tungsten slugs, cathode indicated by single band, weight 193 mg, dimensions BD = 0.091–0.103 in (2.31–2.62 mm), BL = 0.168–0.200 in (4.28–5.08 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Reverse-biased Zener terminal | Connected to higher potential node; regulates voltage by clamping reverse voltage to VZ. |
| Anode (unbanded end) | Reference/ground return terminal | Provides low-impedance path for Zener current; must be tied to system ground or lowest potential rail. |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass seal | Prevents moisture ingress and internal corrosion - essential for >20-year field life in sealed modules. |
| Triple-layer passivation | Enhances surface stability against ion migration and contamination in high-humidity or radiation environments. |
| MIL-PRF-19500/406 qualification | Validated for JAN/JANTXV levels - confirms screening, lot traceability, and burn-in compliance for flight hardware. |
| Category I metallurgical bond | Ensures mechanical integrity under thermal cycling and vibration stress up to 20 g RMS in aerospace mounts. |
| Radiation hardness | Inherently tolerant to total ionizing dose (TID) per MicroNote 050 - suitable for low-earth orbit applications. |
Applications
| Aerospace Power Conditioning | Defense System Reference |
|---|---|
Use Scenario: Regulating auxiliary supply rails in satellite power management units exposed to thermal vacuum and radiation. IC Role / Device Role / Timing Role: Zener voltage reference providing stable 10.0 V bias for ADC drivers and op-amp comparators. Use Value: ±1% tolerance and −65 °C to +175 °C operation ensure consistent reference accuracy across orbital temperature swings. |
Use Scenario: Precision voltage clamping in radar receiver front-end protection circuits. IC Role / Device Role / Timing Role: Overvoltage limiter safeguarding LNA inputs against ESD and lightning-induced transients. Use Value: Low ZZT (≤5 Ω) minimizes clamping voltage overshoot during fast-rising surges up to 8.3 ms. |
| Avionics Sensor Biasing | Nuclear Instrumentation |
Use Scenario: Supplying calibrated excitation voltage to strain gauge bridges in flight control sensors. IC Role / Device Role / Timing Role: Stable 10.0 V reference source for ratiometric measurement circuits. Use Value: Hermetic seal and triple passivation prevent parameter drift due to humidity or outgassing in sealed sensor housings. |
Use Scenario: Providing regulated bias for photomultiplier tube (PMT) dynode chains in radiation detection equipment. IC Role / Device Role / Timing Role: High-reliability Zener regulator maintaining constant inter-dynode voltage gradients. Use Value: Radiation hardness and 1.5 W power handling support continuous operation in high-dose gamma fields. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4465US | Same 10.0 V VZ and package, but ±5% tolerance (no suffix) instead of ±1%. | Acceptable where tighter regulation is not required; lower cost for non-critical references. | Select 1N4465US when ±5% tolerance suffices and MIL-spec screening is optional. |
| 1N5240B | 10 V Zener, ±5%, DO-35 axial package, 0.5 W rating, commercial-grade only. | Lacks hermetic seal, MIL qualification, and high-temp capability; unsuitable for aerospace use. | Choose 1N5240B only for cost-sensitive, non-military prototypes with ambient temperature constraints. |
Compared with 1N4465US and 1N5240B, the 1N4465DUS provides uniquely tight ±1% tolerance, full MIL-PRF-19500/406 qualification, and 1.5 W power handling in a hermetic MELF package - making it the sole option for flight-critical voltage references requiring long-term stability under radiation and thermal stress.
Availability
1N4465DUS is available at Aetrix Electronics and suitable for aerospace power conditioning, defense system reference design, and avionics sensor biasing requiring stable component supply across extended product lifecycles and stringent environmental certifications.
Supply support for 1N4465DUS 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 1N4460US–1N4496US series was designed specifically to meet MIL-PRF-19500/406 requirements for hermetic, high-power Zener regulation in mission-critical systems where failure is not an option.
FAQ
What is the Zener voltage tolerance of the 1N4465DUS?
The 1N4465DUS has a nominal Zener voltage of 10.0 V with a tolerance of ±1%, as indicated by the 'D' suffix in the part number. This tight tolerance is verified per MIL-PRF-19500/406 test procedures and applies across the full operating temperature range of −65 °C to +175 °C. The 1N4465DUS achieves this precision through controlled diffusion and post-trim validation during manufacturing.
Is the 1N4465DUS RoHS compliant?
The 1N4465DUS is not RoHS compliant, as it uses a tin/lead (Sn/Pb) termination finish required for MIL-PRF-19500/406 qualification. RoHS-compliant versions (e3 suffix) are available only for commercial-grade variants such as 1N4465US-e3, which lack JAN/JANTXV screening and hermetic sealing. The 1N4465DUS remains a leaded, military-spec part intended for legacy and high-reliability programs.
What does the 'D' suffix mean in 1N4465DUS?
The 'D' suffix in 1N4465DUS denotes ±1% Zener voltage tolerance, per the Microsemi part nomenclature defined in T4-LDS-0183-1. It also indicates that the device is qualified to JANTXV or JANS reliability levels under MIL-PRF-19500/406. The 'US' suffix confirms the D-5A MELF surface-mount package. No other parameter (e.g., power rating or temperature range) is altered by the 'D' designation.
Can the 1N4465DUS replace the 1N4465US in existing designs?
The 1N4465DUS is physically and electrically compatible with the 1N4465US - same D-5A MELF package, identical pinout, and matching 10.0 V nominal Zener voltage - but offers ±1% tolerance versus ±5%. Substitution is permissible if the design benefits from tighter regulation and can accommodate the higher cost and leaded finish. No PCB changes are needed, but qualification testing for radiation and thermal cycling should be repeated if used in flight hardware.
What is the maximum surge current rating for the 1N4465DUS?
The 1N4465DUS has a non-repetitive peak Zener surge current (IZSM) rating of 0.30 A for an 8.3 ms square wave, as specified in the Electrical Characteristics table on page 3 of T4-LDS-0183-1. This value reflects the device's ability to absorb transient energy without degradation, enabled by its 1.5 W steady-state rating and low thermal impedance (20 °C/W junction-to-end-cap).
1N4465DUS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SQ-MELF, A
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 10 V
- Tolerance:
- ±1%
- Power - Max:
- 1.5 W
- Impedance (Max) (Zzt):
- 5 Ohms
- Current - Reverse Leakage @ Vr:
- 300 nA @ 8 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
1N4465DUS FAQ
1.How can I place an order for 1N4465DUS through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4465DUS 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 1N4465DUS reliable?
The price and inventory of 1N4465DUS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4465DUS is usually 5 days.
3.What payment methods are accepted for 1N4465DUS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4465DUS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4465DUS?
1N4465DUS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4465DUS 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 1N4465DUS?
For technical support, including 1N4465DUS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4465DUS requirements.
6.How does Aetrix verify that 1N4465DUS is sourced from the original manufacturer or authorized distributors?
All 1N4465DUS 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 1N4465DUS meets industry standards.
7.What is the process for return or replacement of 1N4465DUS?
All 1N4465DUS units undergo pre-shipment inspection (PSI). If there is an issue with 1N4465DUS, 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 1N4465DUS part is unused and in its original packaging.
Return procedure for 1N4465DUS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4465DUS Tags
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