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Microchip Technology 1N4460CUS
- Part No.:
- 1N4460CUS
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, A
- Datasheet:
-
1N4460CUS.pdf
- Description:
- DIODE ZENER 6.2V 1.5W D5A
- Quantity:
- Payment:
- Shipping:
Inventory:2,126
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Product details
Overview
1N4460CUS from Microsemi is a military-qualified, voidless hermetically sealed surface-mount Zener diode in D-5A MELF package, rated for 1.5 W steady-state power dissipation, with nominal Zener voltage 6.2 V at 40 mA test current, ±2% tolerance (C suffix), and operating junction temperature range of –65 °C to +175 °C. It delivers stable voltage regulation in high-reliability aerospace, defense, and downhole instrumentation systems where failure is not tolerable.
For engineers reviewing the 1N4460CUS datasheet, 1N4460CUS pinout, 1N4460CUS application, or 1N4460CUS equivalent, this page provides verified electrical parameters, MIL-PRF-19500/406 qualification status, thermal impedance data, Zener knee characteristics, and direct alternatives for ruggedized analog reference and overvoltage protection designs.
Technical Context
This device operates as a precision shunt voltage regulator in reverse-biased breakdown mode, with specified Zener voltage (VZ = 6.2 V) defined at IZT = 40 mA and dynamic impedance ZZT = 4 Ω. Its construction uses internal Category 1 metallurgical bonds and triple-layer passivation to ensure robustness under thermal cycling and radiation exposure.
The 1N4460CUS exhibits low leakage (IR ≤ 10 µA at VR = 1.0 V), tight regulation (±2% tolerance), and stable temperature coefficient behavior per Figure 1. Thermal impedance ZθJX follows Curve A in Figure 4, supporting transient surge handling up to 2.3 A (8.3 ms square wave).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.2 V at IZT = 40 mA - defines nominal regulation point for precision biasing and reference circuits. |
| Tolerance | ±2% - tighter than standard 5% versions, enabling higher accuracy in closed-loop feedback and calibration paths. |
| Power Dissipation (PD) | 1.5 W @ TA = 25 °C - supports continuous regulation in compact surface-mount layouts without forced cooling. |
| Dynamic Impedance (ZZT) | 4 Ω @ IZT - ensures minimal output voltage variation under load current changes in analog references. |
| Max Reverse Current (IR) | 10 µA @ VR = 1.0 V - guarantees low standby leakage in battery-powered or ultra-low-power monitoring circuits. |
| Junction Temperature Range | –65 °C to +175 °C - enables operation in extreme environments including avionics, oil/gas downhole tools, and space-grade electronics. |
| Forward Voltage (VF) | 1.0 V @ 200 mA - allows use as a low-drop rectifier or clamping diode in dual-role protection circuits. |
Pinout & Package
Package: D-5A MELF (Metal Electrode Leadless Face), hermetically sealed voidless glass case with tungsten slugs; cathode indicated by single polarity band; weight 193 mg; RoHS-compliant matte tin terminations available for commercial grade only.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to circuit ground or lower-potential rail; forms reference return path in shunt regulator topology. |
| Cathode | Zener breakdown terminal / regulated output node | Connected to input supply; maintains stable 6.2 V relative to anode during reverse conduction, enabling voltage clamping or reference generation. |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass seal | Eliminates moisture ingress and internal delamination, ensuring long-term parameter stability in humid or corrosive mil-aero environments. |
| Category 1 metallurgical bond | Provides mechanical integrity and thermal reliability under shock/vibration, validated per MIL-PRF-19500/406 for JAN/JANTXV levels. |
| Triple-layer passivation | Reduces surface leakage and enhances resistance to ionizing radiation, supporting operation in high-dose-rate applications per MicroNote 050. |
| MIL-PRF-19500/406 qualification | Confirms compliance with military screening, burn-in, and life-test requirements for JANS, JANTXV, JANTX, and JAN reliability levels. |
| Non-ESD-sensitive design | Withstands ESD events per MIL-STD-750 Method 1020 without parameter shift, simplifying handling in uncontrolled assembly environments. |
Applications
| Avionics Power Monitoring | Downhole Sensor Reference |
|---|---|
Use Scenario: Regulating reference voltage for ADCs and comparators in flight control sensor signal conditioning modules exposed to wide temperature swings. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 6.2 V reference against varying bus voltages and thermal gradients. Use Value: ±2% tolerance and –65 °C to +175 °C operation ensure consistent ADC full-scale accuracy across operational envelope without recalibration. |
Use Scenario: Biasing precision op-amps and RTD interfaces in oil/gas well logging tools operating at 175 °C ambient. IC Role / Device Role / Timing Role: High-temperature-stable Zener shunt regulator maintaining reference integrity in analog front-end circuits. Use Value: Hermetic glass seal and Category 1 bond prevent parameter drift under sustained high-temperature exposure and mechanical stress. |
| Spacecraft Telemetry Interface | Military Radar Bias Supply |
Use Scenario: Providing radiation-hardened voltage clamp for LVDS receiver inputs on satellite telemetry transceivers. IC Role / Device Role / Timing Role: Transient overvoltage protector and DC reference stabilizer in radiation-prone orbital environments. Use Value: Inherent radiation hardness (per MicroNote 050) and low leakage (<10 µA) preserve signal integrity and reduce false-trigger risk. |
Use Scenario: Stabilizing gate drive bias rails in GaN-based pulse modulators within airborne radar transmitter stages. IC Role / Device Role / Timing Role: Precision shunt regulator supplying fixed 6.2 V to high-speed driver ICs requiring low-noise, low-impedance references. Use Value: 4 Ω dynamic impedance minimizes ripple coupling into sensitive timing paths, improving pulse fidelity and jitter performance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4460US | Same Zener voltage (6.2 V), same package, but ±5% tolerance (no C suffix); lacks tighter tolerance and associated screening for C-grade units. | Suitable for non-critical industrial regulation where cost sensitivity outweighs accuracy requirements. | Select 1N4460US only when ±5% regulation error is acceptable and MIL-PRF-19500/406 C-level screening is unnecessary. |
| 1N4735A | 6.2 V Zener in DO-41 through-hole package; 1 W rating; ±5% tolerance; no military qualification or hermetic seal. | Applicable in commercial-grade PCBs where board space and reliability demands are lower; not suitable for vibration-prone or high-humidity deployments. | Choose 1N4735A only for prototyping or cost-driven consumer applications lacking environmental or qualification constraints. |
Compared with 1N4460US and 1N4735A, the 1N4460CUS uniquely combines ±2% tolerance, hermetic MELF packaging, MIL-PRF-19500/406 qualification, and Category 1 bonding-making it the sole option for mission-critical Zener regulation where parameter stability, radiation resilience, and mechanical robustness are mandatory.
Availability
1N4460CUS is available at Aetrix Electronics and suitable for avionics power monitoring, downhole sensor reference, and spacecraft telemetry interface applications requiring stable component supply, long-lifecycle support, and traceable military-grade sourcing.
Supply support for 1N4460CUS 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 aerospace, defense, and industrial markets.
The 1N4460CUS belongs to Microsemi's military-qualified Zener diode family designed specifically for fail-safe voltage regulation in harsh-environment electronics where parameter drift, moisture ingress, or radiation-induced degradation must be eliminated.
FAQ
What is the Zener voltage tolerance of the 1N4460CUS?
The 1N4460CUS has a nominal Zener voltage of 6.2 V with a tolerance of ±2%, denoted by the "C" suffix in the part number. This tighter tolerance is achieved through post-manufacturing screening and is confirmed in the Electrical Characteristics table on page 3 of T4-LDS-0183-1 Rev. 1. The 1N4460CUS maintains this specification across its full operating temperature range when biased at IZT = 40 mA.
Is the 1N4460CUS qualified to MIL-PRF-19500/406?
Yes, the 1N4460CUS is qualified to MIL-PRF-19500/406 at JAN, JANTX, JANTXV, and JANS reliability levels. This qualification is explicitly stated in the DESCRIPTION section on page 1 of the datasheet and applies to the "US" suffix variant. The 1N4460CUS uses Category 1 internal metallurgical bonds and triple-layer passivation to meet these stringent military screening requirements.
What package type does the 1N4460CUS use?
The 1N4460CUS uses the D-5A MELF (Metal Electrode Leadless Face) package - a cylindrical, hermetically sealed voidless glass case with tungsten slugs. Package dimensions are provided on page 6 of T4-LDS-0183-1 Rev. 1, with body diameter 2.31–2.62 mm and length 4.28–5.08 mm. Polarity is marked by a single cathode band.
Does the 1N4460CUS have radiation hardness?
Yes, the 1N4460CUS is inherently radiation hard as documented in Microsemi MicroNote 050. Its hermetic voidless glass construction, Category 1 metallurgical bond, and triple-layer passivation collectively provide resistance to total ionizing dose (TID) and displacement damage effects - making it suitable for low-earth orbit and nuclear instrumentation applications without additional shielding.
What is the maximum continuous Zener current for the 1N4460CUS?
The maximum continuous Zener current (IZM) for the 1N4460CUS is 230 mA, calculated from its 1.5 W power rating and nominal 6.2 V Zener voltage (IZM = PD/VZ). This value is confirmed in the Electrical Characteristics table on page 3, where IZM is listed as 230 mA at TA = 25 °C with derating applied above that temperature per Figure 2.
1N4460CUS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SQ-MELF, A
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 6.2 V
- Tolerance:
- ±2%
- Power - Max:
- 1.5 W
- Impedance (Max) (Zzt):
- 4 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 3.72 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
1N4460CUS FAQ
1.How can I place an order for 1N4460CUS through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4460CUS 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 1N4460CUS reliable?
The price and inventory of 1N4460CUS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4460CUS is usually 5 days.
3.What payment methods are accepted for 1N4460CUS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4460CUS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4460CUS?
1N4460CUS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4460CUS 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 1N4460CUS?
For technical support, including 1N4460CUS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4460CUS requirements.
6.How does Aetrix verify that 1N4460CUS is sourced from the original manufacturer or authorized distributors?
All 1N4460CUS 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 1N4460CUS meets industry standards.
7.What is the process for return or replacement of 1N4460CUS?
All 1N4460CUS units undergo pre-shipment inspection (PSI). If there is an issue with 1N4460CUS, 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 1N4460CUS part is unused and in its original packaging.
Return procedure for 1N4460CUS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4460CUS Tags
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