My Inquiry
My Account
Microchip Technology 1N4465CUS/TR
- Part No.:
- 1N4465CUS/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, A
- Datasheet:
-
1N4465CUS/TR.pdf
- Description:
- DIODE ZENER 10V 1.5W D5A
- Quantity:
- Payment:
- Shipping:
Inventory:5,566
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N4465CUS/TR from Microsemi is a hermetically sealed, voidless glass MELF surface-mount Zener diode rated for 1.5 W steady-state power dissipation, with nominal Zener voltage of 10.0 V at 25 mA test current, ±2% tolerance (indicated by 'C' suffix), and maximum dynamic impedance of 5 Ω at IZT. It operates across –65 °C to +175 °C junction temperature and is qualified to MIL-PRF-19500/406 JANTXV level for high-reliability voltage regulation in aerospace power conditioning circuits.
For engineers reviewing the 1N4465CUS/TR datasheet, 1N4465CUS/TR pinout, 1N4465CUS/TR application, or 1N4465CUS/TR equivalent, this page delivers verified military-grade Zener specifications, thermal derating behavior, cathode-band polarity marking, tape-and-reel packaging (TR), and direct alternatives with documented voltage/tolerance/package alignment - all critical for radiation-hardened analog reference design and legacy avionics BOM sustainment.
Technical Context
This device implements a precision silicon Zener junction optimized for stable reverse-bias regulation under wide temperature and current variation. Its voidless glass/MELF construction with internal Category I metallurgical bond ensures mechanical robustness and low leakage (<0.25 µA at 8.0 V) even after thermal cycling and humidity exposure.
It exhibits a typical temperature coefficient near zero at 10 V (per Figure 1), enabling minimal drift in reference applications. Thermal resistance junction-to-end-cap is 20 °C/W, and its 8.3 ms non-repetitive surge rating supports transient overvoltage clamping in DC-DC converter feedback paths without degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 10.0 V ±2% at 25 mA - defines precise regulation setpoint for feedback networks and voltage references. |
| Power Dissipation (PD) | 1.5 W @ TA = 25 °C - enables compact, high-density layout without forced cooling in sealed enclosures. |
| Dynamic Impedance (ZZT) | 5 Ω @ IZT = 25 mA - ensures low output impedance for stable regulation under load transients. |
| Junction Temperature Range | –65 °C to +175 °C - supports operation in extreme environments including engine bays and space-grade electronics. |
| Reverse Leakage (IR) | ≤0.25 µA @ VR = 8.0 V - guarantees negligible error current in high-impedance reference divider legs. |
| Forward Voltage (VF) | 1.0 V @ 200 mA - allows use as clamp diode in bidirectional protection schemes without excessive forward drop. |
| Package Type | D-5A MELF (glass, hermetic, voidless) - provides superior moisture resistance and long-term parameter stability vs. plastic SMD packages. |
Pinout & Package
Package: D-5A MELF (cylindrical glass body, cathode indicated by single black band; no discrete pins - terminals are axial end caps).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Forward conduction terminal / low-side connection in shunt regulator | Connected to system ground or lower-potential node; carries full load current during regulation. |
| Cathode (banded end) | Zener breakdown terminal / regulated output node | Connected to input supply via series resistor; maintains stable 10.0 V relative to anode under reverse bias. |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass seal | Eliminates internal delamination risk and moisture ingress, ensuring >20-year parametric stability in sealed modules. |
| Triple-layer passivation | Prevents surface contamination-induced leakage and enhances reliability in high-humidity or salt-fog environments. |
| JANTXV qualification per MIL-PRF-19500/406 | Validated screening includes burn-in, temperature cycling, and lot acceptance testing for mission-critical systems. |
| Category I internal metallurgical bond | Guarantees mechanical integrity of chip-to-lead interface under shock/vibration up to 100 g peak acceleration. |
| RoHS-compliant option (commercial only) | Tin matte finish available for lead-free assembly compatibility without compromising solder joint reliability. |
Applications
| Avionics Power Reference | Satellite DC-DC Feedback |
|---|---|
Use Scenario: Stable 10 V reference for analog-to-digital converters and sensor signal conditioning in flight control computers. IC Role / Device Role / Timing Role: Shunt voltage reference providing precision bias for op-amps and ADC drivers. Use Value: ±2% tolerance and <0.25 µA leakage ensure sub-LSB error contribution across –55 °C to +125 °C operating range. |
Use Scenario: Regulation node in isolated flyback converter feedback loop on LEO satellite power management units. IC Role / Device Role / Timing Role: Zener clamp defining secondary-side output voltage setpoint via optocoupler interface. Use Value: Hermetic MELF package withstands 50 krad(Si) total ionizing dose without parameter shift beyond spec limits. |
| Missile Guidance Bias Supply | Nuclear Plant Instrumentation |
Use Scenario: Low-noise, radiation-tolerant bias source for MEMS gyroscope front-end amplifiers in tactical missile guidance sections. IC Role / Device Role / Timing Role: Precision shunt regulator stabilizing local 10 V rail independent of primary bus fluctuations. Use Value: Zero-TC point near 10 V minimizes drift-induced angular error accumulation over 30-minute flight duration. |
Use Scenario: Redundant voltage reference in safety-critical reactor coolant monitoring sensors exposed to gamma radiation fields. IC Role / Device Role / Timing Role: Fail-safe Zener element in dual-channel comparator threshold circuitry. Use Value: JANS-level qualification and 175 °C max junction temperature support continuous operation inside containment vessel cabinets. |
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 ±5% (no suffix), identical D-5A MELF package and JANTXV qualification. | Looser tolerance acceptable where cost-sensitive or calibration-adjustable designs allow post-assembly trimming. | Select when ±5% initial accuracy suffices and tighter tolerance adds no system benefit. |
| 1N4740A | 10 V ±5%, 1 W rating, DO-41 through-hole package, commercial grade only (no MIL-PRF-19500 qualification). | Limited to non-military industrial controls; lacks radiation hardness, hermeticity, and extended temperature capability. | Choose only for cost-driven, non-safety-critical prototypes where surface-mount constraint is absent. |
Compared with 1N4465CUS/TR, 1N4465US trades ±2% tolerance for broader availability and lower unit cost while retaining identical military qualification and thermal performance; 1N4740A offers basic 10 V regulation but sacrifices hermetic reliability, surge capability, and high-temperature operation required in certified systems.
Availability
1N4465CUS/TR is available at Aetrix Electronics and suitable for avionics power reference, satellite DC-DC feedback, and missile guidance bias supply requiring stable component supply with guaranteed MIL-PRF-19500/406 compliance and long-lifecycle support.
Supply support for 1N4465CUS/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, RF, and radiation-hardened components for defense, aerospace, and industrial markets.
The 1N4460US–1N4496US family was engineered specifically for military and space applications demanding hermetic sealing, extended temperature operation, and proven survivability under radiation and mechanical stress - not general-purpose replacement.
FAQ
What is the Zener voltage tolerance of the 1N4465CUS/TR?
The 1N4465CUS/TR has a nominal Zener voltage of 10.0 V with a tolerance of ±2%, as indicated by the 'C' suffix in the part number. This tight tolerance is achieved through post-trim screening and is maintained across the full –65 °C to +175 °C junction temperature range, making it suitable for precision reference applications where calibration margin is constrained.
Is the 1N4465CUS/TR RoHS compliant?
The 1N4465CUS/TR is not RoHS compliant; the 'CUS' suffix denotes a commercial-grade version with Sn/Pb termination and non-RoHS construction. RoHS-compliant variants (e3 marking) are available only in commercial-grade versions without military qualification - the 1N4465CUS/TR itself retains traditional tin-lead plating for optimal solder joint reliability in high-reliability reflow profiles.
What does the 'TR' suffix mean in 1N4465CUS/TR?
The 'TR' suffix in 1N4465CUS/TR indicates tape-and-reel packaging per EIA-481-B standard, with 2,000 units per reel. This format supports automated SMT placement and is compatible with standard pick-and-place equipment used in high-mix aerospace PCB assembly lines.
Can the 1N4465CUS/TR replace the 1N4465US in a JANTXV-designated board?
Yes - the 1N4465CUS/TR is fully compatible with 1N4465US in JANTXV-qualified designs, sharing identical electrical specs, D-5A MELF package dimensions, and MIL-PRF-19500/406 qualification level. The only difference is the tighter ±2% tolerance; no PCB or layout changes are required for substitution.
What is the maximum surge current rating for the 1N4465CUS/TR?
The 1N4465CUS/TR has a non-repetitive peak Zener surge current (IZSM) rating of 1.4 A for an 8.3 ms square wave pulse, as specified in the Electrical Characteristics table. This enables transient suppression in power supply rails without degradation, provided average power remains within the 1.5 W steady-state limit.
1N4465CUS/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):
- 10 V
- Tolerance:
- ±2%
- 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
1N4465CUS/TR FAQ
1.How can I place an order for 1N4465CUS/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4465CUS/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 1N4465CUS/TR reliable?
The price and inventory of 1N4465CUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4465CUS/TR is usually 5 days.
3.What payment methods are accepted for 1N4465CUS/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4465CUS/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4465CUS/TR?
1N4465CUS/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4465CUS/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 1N4465CUS/TR?
For technical support, including 1N4465CUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4465CUS/TR requirements.
6.How does Aetrix verify that 1N4465CUS/TR is sourced from the original manufacturer or authorized distributors?
All 1N4465CUS/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 1N4465CUS/TR meets industry standards.
7.What is the process for return or replacement of 1N4465CUS/TR?
All 1N4465CUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4465CUS/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 1N4465CUS/TR part is unused and in its original packaging.
Return procedure for 1N4465CUS/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4465CUS/TR Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
