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Microchip Technology 1N4480USE3
- Part No.:
- 1N4480USE3
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, A
- Datasheet:
-
1N4480USE3.pdf
- Description:
- DIODE ZENER 43V 1.5W SQ-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:9,282
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Product details
Overview
1N4480USE3 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 43.0 V at 6.0 mA test current, 40 Ω dynamic impedance, and qualified to MIL-PRF-19500/406 at JANTXV level. It delivers stable voltage regulation in high-reliability aerospace and defense power conditioning circuits.
For engineers reviewing the 1N4480USE3 datasheet, 1N4480USE3 pinout, 1N4480USE3 application, or 1N4480USE3 equivalent, this page provides verified package dimensions, military-grade qualification status, Zener voltage tolerance (±5%), thermal resistance (20 °C/W), and surge current rating (0.33 A @ 8.3 ms) - all critical for radiation-hardened, high-temperature, and mission-critical designs.
Technical Context
This device operates as a precision shunt voltage regulator in reverse-biased breakdown mode, with a specified Zener voltage of 43.0 V at IZT = 6.0 mA and maximum knee impedance ZZK = 950 Ω at IZK = 0.05 mA. Its junction temperature range spans −65 °C to +175 °C, supporting operation in extreme environmental conditions.
The 1N4480USE3 uses a tungsten-slug metallurgical bond within a hard-glass hermetic enclosure, enabling immunity to moisture ingress and ESD per MIL-STD-750 Method 1020. Its RoHS-compliant matte tin termination (e3 suffix) applies only to commercial-grade versions, while military variants retain Sn/Pb plating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 43.0 V at 6.0 mA - defines precise regulation point for feedback loops in DC-DC converters and reference supplies. |
| Power Dissipation (PD) | 1.5 W at 25 °C - sets maximum continuous power handling before thermal derating begins. |
| Dynamic Impedance (ZZT) | 40 Ω at IZT - determines output voltage stability under load transients in regulated power rails. |
| Max Reverse Current (IR) | 0.25 µA at 34.4 V - ensures minimal leakage in high-impedance bias networks and sensing circuits. |
| Junction Temp Range | −65 °C to +175 °C - enables deployment in avionics, downhole tools, and space-qualified electronics. |
| Thermal Resistance (RθJEC) | 20 °C/W - quantifies heat transfer efficiency from junction to end cap, critical for thermal layout design. |
| Zener Surge Current | 0.33 A (8.3 ms square wave) - supports transient overvoltage clamping without failure in protection circuits. |
Pinout & Package
Package: D-5A MELF (Voidless Hermetic Glass), 193 mg weight, cathode indicated by single band. 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 |
|---|---|---|
| Anode | Forward conduction terminal / low-side connection in shunt regulation | Connected to ground or lower-potential node; carries full load current during Zener conduction. |
| Cathode | Zener breakdown terminal / regulated output node | Marked with band; connected to input rail; maintains stable 43.0 V relative to anode under regulation. |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass construction | Eliminates internal delamination risk and moisture-induced parameter drift over lifetime in harsh environments. |
| Triple-layer passivation | Prevents surface contamination and ion migration, ensuring long-term Zener voltage stability under thermal cycling. |
| MIL-PRF-19500/406 JANTXV qualification | Validates performance across extended temperature, shock, vibration, and burn-in screening for flight-critical systems. |
| Category 1 metallurgical bond | Provides mechanical robustness against thermal stress and wire-bond fatigue in high-reliability power regulation. |
| Non-sensitive to ESD (MIL-STD-750 Method 1020) | Enables safe handling and assembly without special grounding protocols in production and field repair. |
Applications
| Aerospace Power Conditioning | Defense Radar Bias Supply |
|---|---|
Use Scenario: Regulating auxiliary supply rails in satellite power management units exposed to wide thermal swings and radiation. IC Role / Device Role / Timing Role: Shunt voltage reference and overvoltage clamp protecting downstream DC-DC controllers. Use Value: Maintains 43.0 V ±5% regulation across −65 °C to +175 °C with <0.25 µA leakage at 80% VZ, ensuring system uptime in orbit. |
Use Scenario: Providing stable bias voltage for GaN RF amplifier stages in airborne radar transceivers. IC Role / Device Role / Timing Role: Precision Zener reference in high-speed analog front-end power sequencing circuits. Use Value: Delivers 40 Ω dynamic impedance at 6 mA to suppress ripple-induced gain variation in multi-kW transmit modules. |
| Downhole Oilfield Instrumentation | Industrial Safety PLC Input Protection |
Use Scenario: Voltage clamping in sensor signal conditioning circuits operating at 175 °C in oil/gas well logging tools. IC Role / Device Role / Timing Role: High-temperature Zener clamp absorbing induced transients on 4–20 mA loop interfaces. Use Value: Survives 0.33 A surge (8.3 ms) without degradation, preventing false tripping in safety-critical measurement chains. |
Use Scenario: Overvoltage protection for digital input channels in SIL-2 programmable logic controllers used in chemical plants. IC Role / Device Role / Timing Role: Fail-safe shunt regulator that fails open under overstress, preserving controller integrity. Use Value: Hermetic glass seal prevents corrosion-induced shorting in humid, corrosive industrial atmospheres over 20+ year service life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4480US (non-RoHS) | Same electrical specs and package, but Sn/Pb termination instead of matte tin (e3); not RoHS compliant. | Restricted to legacy military programs where Pb-based solder is mandated; unsuitable for new commercial or export designs. | Select only if JANTXV qualification and Pb solder compatibility are required and RoHS compliance is waived. |
| SMF43A (ON Semiconductor) | Surface-mount SOD-123 package, 43 V, 1.0 W, 100 Ω ZZT; no MIL-spec qualification or hermetic seal. | Limited to commercial industrial use; lacks radiation hardness, extended temp range, and ESD immunity per MIL-STD-750. | Choose for cost-sensitive, non-mission-critical applications where 1.5 W rating and hermetic reliability are not required. |
Compared with 1N4480USE3, the 1N4480US offers identical performance with legacy termination, while SMF43A trades military-grade robustness for lower cost and smaller footprint in benign environments - making the 1N4480USE3 essential where reliability, radiation tolerance, and extreme temperature operation are non-negotiable.
Availability
1N4480USE3 is available at Aetrix Electronics and suitable for aerospace power conditioning, defense radar bias supply, and downhole oilfield instrumentation requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1N4480USE3 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, radiation-hardened, and military-qualified components for aerospace, defense, and industrial markets.
The 1N4480USE3 belongs to Microsemi's MIL-PRF-19500/406-qualified Zener diode family designed specifically for mission-critical voltage regulation where failure is not an option - emphasizing hermeticity, thermal resilience, and long-term parametric stability.
FAQ
What is the Zener voltage tolerance for 1N4480USE3?
The 1N4480USE3 has a nominal Zener voltage of 43.0 V with a standard tolerance of ±5%, meaning its actual breakdown voltage falls between 40.85 V and 45.15 V when measured at 6.0 mA. This tolerance is inherent to the base part number and does not require a suffix - tighter tolerances (±2% or ±1%) would be designated with 'C' or 'D' suffixes, which do not apply to the 1N4480USE3.
Is 1N4480USE3 RoHS compliant?
Yes, the 'e3' suffix in 1N4480USE3 explicitly denotes RoHS compliance with matte tin termination, per Microsemi documentation. However, this applies only to commercial-grade versions; military-qualified variants (e.g., JANTXV) use Sn/Pb plating and are exempt from RoHS. The 1N4480USE3 is certified for commercial use with lead-free assembly processes.
What does the 'USE3' suffix mean in 1N4480USE3?
In the 1N4480USE3 nomenclature, 'US' indicates surface-mount MELF (D-5A) packaging, 'E3' specifies RoHS-compliant matte tin termination, and the absence of a tolerance suffix (e.g., 'C' or 'D') confirms the standard ±5% Zener voltage tolerance. The base '1N4480' identifies the 43.0 V Zener voltage grade within the MIL-PRF-19500/406-qualified series.
Can 1N4480USE3 replace 1N4480US in existing designs?
Yes, the 1N4480USE3 is a direct replacement for 1N4480US in terms of electrical parameters, package outline, and thermal characteristics - the only difference is the RoHS-compliant matte tin termination versus Sn/Pb. No PCB layout or schematic changes are needed, but requalification may be required if the design mandates Pb-based solder compatibility.
What is the maximum surge current rating for 1N4480USE3?
The 1N4480USE3 is rated for a non-repetitive peak Zener surge current (IZSM) of 0.33 A under an 8.3 ms square-wave pulse, as specified in the Electrical Characteristics table on page 3 of the T4-LDS-0183-1 datasheet. This value reflects its capability to absorb transient energy without parametric shift or catastrophic failure in protection circuits.
1N4480USE3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SQ-MELF, A
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 43 V
- Tolerance:
- ±5%
- Power - Max:
- 1.5 W
- Impedance (Max) (Zzt):
- 40 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 34.4 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:
- A, SQ-MELF
1N4480USE3 FAQ
1.How can I place an order for 1N4480USE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4480USE3 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 1N4480USE3 reliable?
The price and inventory of 1N4480USE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4480USE3 is usually 5 days.
3.What payment methods are accepted for 1N4480USE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4480USE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4480USE3?
1N4480USE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4480USE3 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 1N4480USE3?
For technical support, including 1N4480USE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4480USE3 requirements.
6.How does Aetrix verify that 1N4480USE3 is sourced from the original manufacturer or authorized distributors?
All 1N4480USE3 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 1N4480USE3 meets industry standards.
7.What is the process for return or replacement of 1N4480USE3?
All 1N4480USE3 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4480USE3, 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 1N4480USE3 part is unused and in its original packaging.
Return procedure for 1N4480USE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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