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Microchip Technology 1N6339US/TR
- Part No.:
- 1N6339US/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, B
- Datasheet:
-
1N6339US/TR.pdf
- Description:
- DIODE ZENER 43V 500MW SQ-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:100
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Product details
Overview
1N6339US/TR from Microsemi is a military-qualified, voidless hermetically sealed glass Zener diode delivering precise 43.0 V regulation at 3.0 mA test current, with ±5% tolerance, 0.5 W power rating, and -65°C to +175°C operating temperature range-used in voltage reference and overvoltage protection circuits for aerospace power supplies.
For engineers reviewing the 1N6339US/TR datasheet, 1N6339US/TR pinout, 1N6339US/TR application, or 1N6339US/TR equivalent, this page provides verified Zener voltage, dynamic impedance (800 Ω @ 3.0 mA), temperature coefficient (+0.095 %/°C), surge current rating (33 A), and MIL-PRF-19500/533 qualification level-critical for high-reliability analog reference design.
Technical Context
This device operates as a precision shunt voltage regulator in reverse-biased breakdown mode, with a nominal Zener voltage of 43.0 V at IZ = 3.0 mA and dynamic impedance of 800 Ω, enabling stable reference generation across wide current (250 µA–65 mA) and temperature (-65°C to +175°C) ranges.
Its voidless hermetic glass package with tungsten slugs and internal Category I metallurgical bond ensures radiation hardness per MicroNote 050 and ESD immunity per MIL-STD-750 Method 1020-key for space-grade and defense electronics where failure is unacceptable.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 43.0 V ±5% at 3.0 mA - defines primary regulation point for precision reference design |
| Power Dissipation (PD) | 0.5 W @ TEC = 150°C - sets maximum continuous thermal load without derating |
| Dynamic Impedance (ZZ) | 800 Ω @ 3.0 mA - determines output voltage stability under varying load current |
| Temp. Coefficient (αVZ) | +0.095 %/°C - quantifies voltage drift with ambient temperature change |
| Max Surge Current (IZSM) | 33 A (8.3 ms square wave) - supports transient overvoltage clamping capability |
| Junction Temp. Range | -65°C to +175°C - enables operation in extreme environmental conditions |
| Reverse Leakage (IR) | 0.05 µA @ 33 V - ensures minimal standby power loss in high-impedance bias networks |
Pinout & Package
Hermetically sealed B-SQ MELF ("D") package with axial symmetry; cathode indicated by band; end-cap terminals provide low-inductance, high-reliability solder interface; RoHS-compliant matte tin finish available for commercial grade only.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side reference node | Connected to circuit ground or lowest potential point in shunt regulator topology |
| Cathode | Zener breakdown terminal / regulated output node | Provides stable 43.0 V reference when reverse-biased above VZ; marked with band |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass construction | Eliminates moisture ingress and long-term parameter drift in humid or vacuum environments |
| Category I internal metallurgical bond | Ensures mechanical integrity and thermal cycling reliability up to 1000 cycles between -65°C and +175°C |
| MIL-PRF-19500/533 qualification (JAN/JANTXV) | Validated screening, testing, and traceability for flight-critical avionics and missile systems |
| Radiation hardness (per MicroNote 050) | Withstands total ionizing dose (TID) ≥ 100 krad(Si) without parametric degradation |
| ESD immunity (MIL-STD-750 Method 1020) | Survives ≥ 4 kV HBM without junction damage-enables handling in non-ESD-controlled assembly areas |
Applications
| Aerospace Power Reference | Defense System Voltage Clamp |
|---|---|
Use Scenario: Precision voltage reference in satellite DC-DC converter feedback loops requiring long-term stability over thermal vacuum cycles. IC Role / Device Role / Timing Role: Shunt Zener reference providing 43.0 V setpoint for error amplifier input. Use Value: ±5% initial tolerance and +0.095 %/°C TC enable <±1.5% total drift over -55°C to +125°C operational range. |
Use Scenario: Overvoltage protection in radar transmitter power rails exposed to lightning-induced transients. IC Role / Device Role / Timing Role: Fast-response shunt clamp absorbing 33 A surge pulses without failure. Use Value: 800 Ω dynamic impedance and hermetic seal ensure repeatable clamping performance after >10⁴ surge events. |
| Avionics Sensor Biasing | Nuclear Instrumentation Reference |
Use Scenario: Stable bias supply for radiation-hardened pressure transducers in flight control computers. IC Role / Device Role / Timing Role: Low-noise (1 µV/√Hz) Zener source powering sensor bridge excitation. Use Value: 0.05 µA leakage at 33 V minimizes current draw in ultra-low-power 2-wire sensor interfaces. |
Use Scenario: Primary voltage reference in reactor monitoring systems requiring decades-long calibration stability. IC Role / Device Role / Timing Role: Radiation-tolerant shunt regulator maintaining 43.0 V despite cumulative TID exposure. Use Value: Documented radiation hardness per MicroNote 050 supports 20+ year field life in high-dose environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N6339US | Same Zener voltage (43.0 V), identical package and qualification-but supplied in bulk, not tape-and-reel | Preferred for manual prototyping or low-volume hand-soldered assemblies | Select 1N6339US/TR when automated SMT placement and reel-based production are required |
| 1N6339DUS | Same 43.0 V nominal voltage but ±1% tolerance (vs. ±5% for 1N6339US/TR); otherwise identical package and ratings | Suitable where tighter initial accuracy is needed for calibration-critical instrumentation | Choose 1N6339DUS if system-level calibration budget requires <±0.5% reference uncertainty at 25°C |
Compared with 1N6339US/TR, the 1N6339US offers identical electrical behavior but lacks tape-and-reel packaging for SMT lines, while 1N6339DUS trades wider tolerance for higher initial accuracy-making it preferable for metrology-grade references but less cost-effective for general-purpose clamping.
Availability
1N6339US/TR is available at Aetrix Electronics and suitable for aerospace power reference, defense system voltage clamp, and avionics sensor biasing requiring stable component supply with full MIL-PRF-19500 traceability and long-term obsolescence management.
Supply support for 1N6339US/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, radiation-hardened, and military-qualified analog and mixed-signal components.
The 1N63xxUS series belongs to Microsemi's legacy MIL-qualified Zener diode product line, designed specifically for voltage regulation and reference applications in aerospace, defense, and nuclear instrumentation where zero-failure operation is mandatory.
FAQ
What is the Zener voltage and tolerance of the 1N6339US/TR?
The 1N6339US/TR has a nominal Zener voltage of 43.0 V with a ±5% tolerance, measured at a test current of 3.0 mA. This specification is guaranteed per MIL-PRF-19500/533 screening and applies across the full -65°C to +175°C junction temperature range. The 1N6339US/TR maintains this voltage regulation with dynamic impedance of 800 Ω at the same test condition.
Is the 1N6339US/TR qualified to MIL-PRF-19500 standards?
Yes, the 1N6339US/TR is qualified to MIL-PRF-19500/533 at JANTXV reliability level, including full screening for burn-in, temperature cycling, and hermeticity. It carries the "US" suffix denoting the B-SQ MELF package and meets all requirements for high-reliability applications in aerospace and defense systems. The 1N6339US/TR documentation includes full test reports traceable to lot and wafer.
What is the maximum surge current rating for the 1N6339US/TR?
The 1N6339US/TR supports a non-repetitive peak Zener surge current (IZSM) of 33 A for an 8.3 ms square wave pulse, as specified in the Electrical Characteristics table. This rating reflects its capability to absorb transient overvoltages without parametric shift or catastrophic failure-critical for use in lightning-prone avionics power rails. The 1N6339US/TR achieves this with its voidless glass construction and tungsten slug thermal path.
Does the 1N6339US/TR have radiation hardness certification?
Yes, the 1N6339US/TR exhibits inherent radiation hardness documented in Microsemi MicroNote 050, supporting total ionizing dose (TID) tolerance ≥ 100 krad(Si) without measurable degradation in Zener voltage or dynamic impedance. This property stems from its hermetic glass package and silicon process, making the 1N6339US/TR suitable for satellite and nuclear instrumentation applications where long-term parametric stability under radiation is essential.
What is the thermal resistance and power derating behavior of the 1N6339US/TR?
The 1N6339US/TR has a junction-to-end-cap thermal resistance (RθJEC) of 21 °C/W for devices in the 1N6321US–1N6355US group, enabling 0.5 W dissipation at TEC = 150°C. Power must be linearly derated above 150°C at 11.9 mW/°C, reaching zero at +175°C. Its RθJA is 240 °C/W on a standard FR4 PCB-meaning the 1N6339US/TR requires careful thermal layout in high-density designs to avoid exceeding junction limits.
1N6339US/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SQ-MELF, B
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 43 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 65 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 33 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.4 V @ 1 A
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- B, SQ-MELF
1N6339US/TR FAQ
1.How can I place an order for 1N6339US/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6339US/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 1N6339US/TR reliable?
The price and inventory of 1N6339US/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6339US/TR is usually 5 days.
3.What payment methods are accepted for 1N6339US/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6339US/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6339US/TR?
1N6339US/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6339US/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 1N6339US/TR?
For technical support, including 1N6339US/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6339US/TR requirements.
6.How does Aetrix verify that 1N6339US/TR is sourced from the original manufacturer or authorized distributors?
All 1N6339US/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 1N6339US/TR meets industry standards.
7.What is the process for return or replacement of 1N6339US/TR?
All 1N6339US/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N6339US/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 1N6339US/TR part is unused and in its original packaging.
Return procedure for 1N6339US/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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