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Microchip Technology 1N4468CUS/TR
- Part No.:
- 1N4468CUS/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, A
- Datasheet:
-
1N4468CUS/TR.pdf
- Description:
- DIODE ZENER 13V 1.5W D5A
- Quantity:
- Payment:
- Shipping:
Inventory:9,000
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Product details
Overview
1N4468CUS/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 a nominal Zener voltage of 13.0 V at 19.0 mA test current, ±2% tolerance (denoted by 'C' suffix), and maximum dynamic impedance of 8 Ω at IZT. It operates across –65 °C to +175 °C junction temperature and is qualified to MIL-PRF-19500/406 at JANTXV level for high-reliability voltage regulation in aerospace power conditioning circuits.
For engineers reviewing the 1N4468CUS/TR datasheet, 1N4468CUS/TR pinout, 1N4468CUS/TR application, or 1N4468CUS/TR equivalent, this part delivers military-grade stability, low-impedance regulation at 13 V, and radiation-hardened performance validated per MicroNote 050 - critical for avionics reference supplies, precision bias networks, and hardened analog front-ends where failure is not an option.
Technical Context
This Zener diode employs internal Category I metallurgical bonds and triple-layer passivation to ensure long-term reliability under thermal cycling and mechanical stress. Its voidless hermetic glass construction eliminates moisture ingress and interfacial delamination risks common in epoxy-packaged alternatives.
The device exhibits a well-defined Zener breakdown knee (IZK = 19.0 mA, ZZK = 550 Ω) and maintains stable regulation over 1.0–10.4 mA operating current range, with reverse leakage ≤0.25 µA at 10.4 V and forward voltage ≤1.0 V at 200 mA - enabling use in both shunt regulation and precision clamping roles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 13.0 V ±2% at IZT = 19.0 mA - precise reference for 12–15 V rail stabilization |
| Power Dissipation (PD) | 1.5 W @ TA = 25 °C - supports continuous regulation without heatsinking in compact layouts |
| Dynamic Impedance (ZZT) | 8 Ω @ IZT - low AC impedance ensures minimal output voltage variation under load transients |
| Junction Temperature Range | –65 °C to +175 °C - enables operation in extreme environments including engine bays and space-grade enclosures |
| Reverse Leakage (IR) | ≤0.25 µA @ VR = 10.4 V - negligible current draw in standby, preserving battery life in always-on systems |
| Forward Voltage (VF) | ≤1.0 V @ 200 mA - allows bidirectional protection or dual-role use as clamp and rectifier in fault-tolerant designs |
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 | Current entry point in forward bias; connected to system ground or low-side reference | Enables standard Zener shunt configuration when cathode is tied to regulated rail |
| Cathode | Current exit point in forward bias; Zener breakdown terminal in reverse bias | Marked by band; connects to voltage rail requiring regulation or clamping |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass seal | Eliminates moisture-induced parameter drift and corrosion failure modes over 20+ year field life |
| Category I metallurgical bond | Ensures mechanical integrity under shock/vibration up to 100 g, meeting MIL-STD-883 Method 2002 |
| Triple-layer passivation | Blocks ion migration and surface conduction paths, maintaining Zener voltage stability in humid/harsh atmospheres |
| MIL-PRF-19500/406 qualification | Validated screening includes burn-in, temperature cycling, and lot acceptance testing per JANTXV requirements |
| Radiation hardness | Specified per Microsemi MicroNote 050 - suitable for TID > 100 krad(Si) environments without derating |
Applications
| Aerospace Power Reference | Avionics Sensor Biasing |
|---|---|
Use Scenario: Providing stable 13 V reference for ADCs and DACs in flight control computers operating across –55 °C to +125 °C ambient. IC Role / Device Role / Timing Role: Shunt voltage regulator establishing precision analog reference rail independent of input ripple or load variation. Use Value: Maintains <±0.26 V regulation window (13.0 V ±2%) with <8 Ω dynamic impedance, ensuring <0.02% full-scale error in 16-bit data acquisition. |
Use Scenario: Biasing bridge-based pressure transducers in engine monitoring units exposed to thermal shock and EMI. IC Role / Device Role / Timing Role: Low-leakage (≤0.25 µA) Zener clamp protecting op-amp inputs from overvoltage during ignition transients. Use Value: Prevents sensor signal corruption by clamping excitation rails to 13.0 V while drawing negligible quiescent current that would affect bridge balance. |
| Satellite Power Conditioning | Tactical Radio RF Stage Protection |
Use Scenario: Regulating auxiliary 13 V supply for FPGA configuration memory and clock buffers in LEO satellite payloads. IC Role / Device Role / Timing Role: Radiation-hardened voltage reference source maintaining regulation after cumulative TID exposure >100 krad(Si). Use Value: Eliminates need for redundant regulators; Zener voltage shift <0.5% post-irradiation per MicroNote 050 validation. |
Use Scenario: Protecting low-noise amplifier inputs in HF/VHF manpack radios from antenna-coupled lightning surges and ESD events. IC Role / Device Role / Timing Role: Fast-response (ns-scale) clamping element absorbing transient energy before it reaches sensitive GaAs MMIC stages. Use Value: Withstands 8.3 ms surge current up to 1.1 A (IZSM) and exhibits non-sensitive ESD behavior per MIL-STD-750 Method 1020. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4468US | Same 13.0 V Zener voltage and D-5A package, but ±5% tolerance (no suffix) vs. ±2% (C suffix) | Acceptable where tighter regulation is not required; lower cost for commercial-grade systems | Select 1N4468US when budget constraints outweigh need for 2% accuracy in non-critical biasing |
| SMF13A | Surface-mount TVS diode (not Zener); 13 V standoff, 200 W peak pulse power, 10/1000 µs waveform | Designed for transient suppression, not DC regulation; higher leakage (>1 µA) and no tight VZ spec | Choose SMF13A only for surge-only protection; never as DC replacement for 1N4468CUS/TR's regulation function |
Compared with 1N4468US and SMF13A, the 1N4468CUS/TR uniquely combines ±2% DC regulation accuracy, hermetic reliability, and MIL-qualified screening - making it irreplaceable for applications demanding simultaneous precision, longevity, and environmental resilience.
Availability
1N4468CUS/TR is available at Aetrix Electronics and suitable for aerospace power reference, avionics sensor biasing, and satellite power conditioning requiring stable component supply with guaranteed traceability and long-term obsolescence management.
Supply support for 1N4468CUS/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 defense, aerospace, and industrial markets.
The 1N4468CUS/TR belongs to Microsemi's military-qualified Zener diode family designed specifically for mission-critical voltage regulation where parameter stability, radiation tolerance, and hermetic integrity are non-negotiable design requirements.
FAQ
What is the Zener voltage tolerance of the 1N4468CUS/TR?
The 1N4468CUS/TR has a nominal Zener voltage of 13.0 V with ±2% tolerance, confirmed by the 'C' suffix in its nomenclature per Microsemi's part numbering system. This tolerance is verified at IZT = 19.0 mA and ensures regulation within 12.74–13.26 V across qualified lots and temperature ranges - critical for precision reference applications where 1N4468CUS/TR replaces wider-tolerance variants.
Is the 1N4468CUS/TR RoHS compliant?
The 1N4468CUS/TR is available in RoHS-compliant versions with matte tin terminations, but only for commercial-grade units; military-grade (JAN/JANTXV) versions retain Sn/Pb terminations per MIL-PRF-19500/406 requirements. The 'e3' marking denotes RoHS compliance, and this applies to the commercial variant of 1N4468CUS/TR - verify ordering code suffix with Aetrix Electronics for exact compliance status.
What is the maximum continuous Zener current for the 1N4468CUS/TR?
The maximum continuous Zener current (IZM) for the 1N4468CUS/TR is 1.1 A, calculated from its 1.5 W power rating and 13.0 V Zener voltage (IZM = PD/VZ). This value assumes TA = 25 °C and proper thermal management; derating is required above 25 °C per the end-cap thermal resistance (RθJEC = 20 °C/W) specified in the 1N4468CUS/TR datasheet.
Does the 1N4468CUS/TR have radiation hardness certification?
Yes, the 1N4468CUS/TR is inherently radiation hard as documented in Microsemi MicroNote 050, supporting total ionizing dose (TID) levels exceeding 100 krad(Si) without functional degradation. This radiation hardness is a direct result of its hermetic glass construction and Category I metallurgical bonding - key reasons why 1N4468CUS/TR is selected for satellite and nuclear instrumentation applications.
What package type does the 1N4468CUS/TR use?
The 1N4468CUS/TR uses the D-5A MELF (Metal Electrode Leadless Face) package - a cylindrical, hermetically sealed voidless glass case with tungsten slugs and axial symmetry. Dimensions are BD = 0.091–0.103 in (2.31–2.62 mm) diameter and BL = 0.168–0.200 in (4.28–5.08 mm) length, per Microsemi's package drawing in T4-LDS-0183-1 Rev. 1.
1N4468CUS/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):
- 13 V
- Tolerance:
- ±2%
- Power - Max:
- 1.5 W
- Impedance (Max) (Zzt):
- 8 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 10.4 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
1N4468CUS/TR FAQ
1.How can I place an order for 1N4468CUS/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4468CUS/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 1N4468CUS/TR reliable?
The price and inventory of 1N4468CUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4468CUS/TR is usually 5 days.
3.What payment methods are accepted for 1N4468CUS/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4468CUS/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4468CUS/TR?
1N4468CUS/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4468CUS/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 1N4468CUS/TR?
For technical support, including 1N4468CUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4468CUS/TR requirements.
6.How does Aetrix verify that 1N4468CUS/TR is sourced from the original manufacturer or authorized distributors?
All 1N4468CUS/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 1N4468CUS/TR meets industry standards.
7.What is the process for return or replacement of 1N4468CUS/TR?
All 1N4468CUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4468CUS/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 1N4468CUS/TR part is unused and in its original packaging.
Return procedure for 1N4468CUS/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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