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Microchip Technology 1N6486US/TR
- Part No.:
- 1N6486US/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, A
- Datasheet:
-
1N6486US/TR.pdf
- Description:
- DIODE ZENER 3.6V 1.5W D5A
- Quantity:
- Payment:
- Shipping:
Inventory:82
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Product details
Overview
1N6486US/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 3.6 V at 69 mA test current, ±5% tolerance, and maximum dynamic impedance of 10 Ω at IZT. It operates across –65 °C to +175 °C junction temperature and is qualified to MIL-PRF-19500/406 (JAN/JANTX levels) for high-reliability voltage regulation in aerospace power conditioning circuits.
For engineers reviewing the 1N6486US/TR datasheet, 1N6486US/TR pinout, 1N6486US/TR application, or 1N6486US/TR equivalent, this part serves as a military-grade, RoHS-compliant (commercial grade) Zener regulator with verified thermal impedance (Figure 4), low leakage (<1.0 µA @ 1.0 V), and radiation-hardened construction per MicroNote 050 - critical for space-qualified analog reference and overvoltage clamp designs.
Technical Context
This device belongs to Microsemi's D-5A MELF family of hermetic Zeners, featuring internal Category III metallurgical bonds and triple-layer passivation for enhanced reliability under thermal cycling and humidity stress. Its 3.6 V Zener voltage places it in the low-voltage knee region where temperature coefficient is near-zero, minimizing drift in precision biasing applications.
The 1N6486US/TR uses a tungsten slug end-cap construction with tin/lead or matte tin terminations, delivering 20 °C/W junction-to-end-cap thermal resistance and validated 10 ms thermal impedance per Figure 4. It exhibits non-sensitive ESD behavior per MIL-STD-750 Method 1020 and supports surge currents up to 3.9 A (8.3 ms square wave).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.6 V at 69 mA test current - stable reference point for low-voltage analog circuit biasing |
| Power Dissipation (PD) | 1.5 W @ TA = 25 °C - enables compact, high-density PCB layout without forced cooling |
| Dynamic Impedance (ZZT) | 10 Ω @ IZT - ensures tight regulation under varying load current in feedback loops |
| Junction Temperature Range | –65 °C to +175 °C - supports operation in extreme environments including avionics and downhole electronics |
| Reverse Leakage (IR) | ≤1.0 µA @ 1.0 V - preserves low-power standby integrity in battery-backed systems |
| Thermal Resistance (RθJEC) | 20 °C/W - allows accurate thermal modeling when mounted on copper pads or heat-spreading substrates |
Pinout & Package
Package: D-5A MELF (Voidless hermetic glass, tungsten slugs, cathode band marking). Dimensions: BD = 0.091–0.103 in (2.31–2.62 mm), BL = 0.168–0.200 in (4.28–5.08 mm), weight = 193 mg.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node in reverse-biased Zener configuration; carries full regulator current during clamping |
| Cathode | Zener breakdown terminal | Marked by polarity band; connected to higher-potential node; defines regulated output voltage referenced to anode |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic voidless glass seal | Prevents moisture ingress and long-term parameter drift in humid or vacuum environments |
| Category III metallurgical bond | Ensures mechanical robustness and thermal cycle survivability >1000 cycles between –55 °C and +125 °C |
| MIL-PRF-19500/406 qualification | Validated screening for JAN/JANTX levels - includes burn-in, temperature cycling, and lot acceptance testing |
| Triple-layer passivation | Reduces surface leakage and enhances stability under high-humidity and ionizing radiation exposure |
| Radiation hardness | Characterized per Microsemi MicroNote 050 - suitable for TID >100 krad(Si) missions without derating |
Applications
| Avionics Power Conditioning | Satellite Reference Voltage Generation |
|---|---|
Use Scenario: Regulating auxiliary 3.3 V rail in flight control computer power supply under wide temperature and radiation exposure. IC Role / Device Role / Timing Role: Zener shunt regulator providing stable bias for op-amps and ADC references. Use Value: Maintains <±2% output variation across –55 °C to +125 °C due to near-zero TC at 3.6 V and hermetic stability. |
Use Scenario: Generating precision 3.6 V reference for star tracker sensor front-end in LEO satellite payload. IC Role / Device Role / Timing Role: Low-drift voltage reference element in radiation-hardened analog signal chain. Use Value: Delivers <1 µA leakage and <10 Ω dynamic impedance to preserve SNR in low-noise amplifiers. |
| Downhole Telemetry Biasing | Nuclear Instrumentation Clamp Protection |
Use Scenario: Biasing amplifier stages in high-temperature (175 °C) logging-while-drilling (LWD) tools. IC Role / Device Role / Timing Role: High-temperature-stable Zener clamp protecting input stages from transients. Use Value: Sustains regulation integrity up to +175 °C junction temperature with no parameter shift beyond spec limits. |
Use Scenario: Overvoltage protection for pulse-height analyzer inputs in reactor monitoring systems. IC Role / Device Role / Timing Role: Fast-response shunt clamp limiting transient spikes to ≤4.0 V. Use Value: Withstands 3.9 A surge (8.3 ms) and exhibits <0.25 µA IR at 1.0 V - ensuring signal fidelity during neutron flux events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N6486US (non-TR) | Same electrical specs and package; differs only in packaging (bulk vs. tape-and-reel) | No functional difference; TR version optimized for automated SMT placement | Select 1N6486US/TR for high-volume production requiring EIA-481-B compliant reel delivery |
| 1N6486 | Non-hermetic DO-41 axial package; lacks MIL-PRF-19500 qualification and radiation hardness | Restricted to commercial-grade, non-mission-critical applications with ambient temperature <125 °C | Choose 1N6486 only for cost-sensitive, non-radiation environments where hermeticity is not required |
Compared with 1N6486US/TR, the bulk-packaged 1N6486US offers identical performance but no reel logistics support, while the legacy 1N6486 sacrifices military qualification, thermal range, and radiation tolerance for lower cost and through-hole compatibility.
Availability
1N6486US/TR is available at Aetrix Electronics and suitable for avionics power conditioning, satellite reference voltage generation, and downhole telemetry biasing requiring stable component supply across extended temperature and radiation-exposed operating conditions.
Supply support for 1N6486US/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 defense-qualified components.
The 1N6486US/TR belongs to Microsemi's military-qualified MELF Zener series designed specifically for mission-critical voltage regulation in aerospace, defense, and nuclear instrumentation systems where failure is not an option.
FAQ
What is the Zener voltage tolerance for 1N6486US/TR?
The 1N6486US/TR has a nominal Zener voltage of 3.6 V with a standard tolerance of ±5%, as specified in the Electrical Characteristics table on page 3 of Microsemi's T4-LDS-0183-1 datasheet. No suffix indicates 5% tolerance; tighter tolerances (±2% or ±1%) require different part suffixes (C or D) and are not applicable to the 1N6486US/TR variant.
Is 1N6486US/TR RoHS compliant?
Yes, the 1N6486US/TR is RoHS compliant (per e3 marking) for commercial-grade versions only, using matte tin termination over copper. Military-grade variants (JAN/JANTX) retain Sn/Pb terminations and are exempt from RoHS. The datasheet confirms RoHS compliance applies exclusively to commercial-grade units.
What is the maximum continuous Zener current (IZM) for 1N6486US/TR?
The maximum continuous Zener current for 1N6486US/TR is 50 mA, derived from its 1.5 W power rating and 3.6 V Zener voltage (IZM = PD/VZ ≈ 417 mA theoretical, but datasheet Table on page 3 specifies 50 mA as the absolute maximum rated dc current under defined thermal conditions).
Does 1N6486US/TR have radiation hardness certification?
Yes, the 1N6486US/TR is inherently radiation hard as documented in Microsemi MicroNote 050. Its hermetic voidless glass construction, Category III metallurgical bonds, and triple-layer passivation contribute to total ionizing dose (TID) resilience exceeding 100 krad(Si), making it suitable for space and nuclear applications.
What is the thermal impedance profile for 1N6486US/TR at 10 ms?
The thermal impedance (ZθJX) for 1N6486US/TR at 10 ms is defined in Figure 4 of the datasheet, which covers the 1N6485US–1N6491US series. At 10 ms, ZθJX is approximately 120 °C/W - critical for evaluating short-duration surge handling and transient thermal response in clamp applications.
1N6486US/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):
- 3.6 V
- Tolerance:
- ±5%
- Power - Max:
- 1.5 W
- Impedance (Max) (Zzt):
- 10 Ohms
- Current - Reverse Leakage @ Vr:
- 50 µA @ 1 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
1N6486US/TR FAQ
1.How can I place an order for 1N6486US/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6486US/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 1N6486US/TR reliable?
The price and inventory of 1N6486US/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6486US/TR is usually 5 days.
3.What payment methods are accepted for 1N6486US/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6486US/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6486US/TR?
1N6486US/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6486US/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 1N6486US/TR?
For technical support, including 1N6486US/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6486US/TR requirements.
6.How does Aetrix verify that 1N6486US/TR is sourced from the original manufacturer or authorized distributors?
All 1N6486US/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 1N6486US/TR meets industry standards.
7.What is the process for return or replacement of 1N6486US/TR?
All 1N6486US/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N6486US/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 1N6486US/TR part is unused and in its original packaging.
Return procedure for 1N6486US/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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