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Microchip Technology 1N755AUR-1/TR
- Part No.:
- 1N755AUR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N755AUR-1/TR.pdf
- Description:
- DIODE ZENER 7.5V 400MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:236
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Product details
Overview
1N755AUR-1/TR from Microsemi is a hermetically sealed, surface-mount silicon zener diode with nominal zener voltage 7.5 V ±5%, 20 mA test current, 6 Ω maximum zener impedance at 20 mA, 2 µA maximum reverse leakage at 5.0 V, and 500 mW power dissipation at +125°C - used for precision voltage regulation in military-grade power supply reference circuits.
For engineers reviewing the 1N755AUR-1/TR datasheet, 1N755AUR-1/TR pinout, 1N755AUR-1/TR application, or 1N755AUR-1/TR equivalent, key selection criteria include zener tolerance (±5%), thermal resistance (100 °C/W), DO-213AA (MELF) package compatibility, MIL-PRF-19500/127 qualification, and junction temperature derating behavior above +125°C.
Technical Context
This device operates as a two-terminal voltage reference diode, conducting in reverse breakdown with stable zener voltage under controlled test current (1ZT = 20 mA). Its metallurgically bonded construction ensures reliability across -65°C to +175°C operating and storage ranges.
Zener impedance (ZZT = 6 Ω max) is measured using 10% AC superimposition on DC test current at 25°C; reverse leakage (IR = 2 µA max) is specified at VR = 5.0 V - both critical for low-noise, high-stability reference design in regulated DC supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 7.5 V ±5% @ 20 mA - defines precise regulation point for feedback loops in analog power supplies. |
| Zener Impedance (ZZT) | 6 Ω max @ 20 mA - ensures minimal output voltage variation under load transients. |
| Reverse Leakage (IR) | 2 µA max @ 5.0 V - guarantees low standby current in battery-backed or low-power reference circuits. |
| Power Dissipation (PD) | 500 mW @ TEC = +125°C - sets thermal design margin for PCB trace width and copper area planning. |
| Thermal Resistance (RθJC) | 100 °C/W max (L = 0 inch) - determines junction-to-case temperature rise per watt in compact layouts. |
| Operating Temperature | -65°C to +175°C - enables deployment in aerospace, downhole, and military vehicle environments. |
Pinout & Package
Package: DO-213AA (MELF, SOD-80, LL34), hermetically sealed glass case, axial leadless surface-mount configuration with cathode band marking. Lead finish: tin/lead.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / reference ground node | Connected to circuit common; polarity must be observed to avoid forward conduction during regulation. |
| Cathode | Reverse-biased zener terminal / regulated output node | Banded end; connected to unregulated input; provides stable 7.5 V reference when reverse-biased above knee voltage. |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/127 qualified | Meets stringent military screening for vibration, shock, temperature cycling, and long-term stability. |
| Hermetic glass MELF package | Eliminates moisture ingress and intermetallic degradation - critical for >10-year field life in harsh environments. |
| ±5% zener tolerance (A suffix) | Reduces calibration overhead in precision reference designs versus ±10% standard variants. |
| Metallurgical bonding | Ensures robust die attachment and thermal transfer under thermal shock conditions (-65°C ↔ +175°C). |
Applications
| Avionics Power Reference | Tactical Radio Bias Supply |
|---|---|
Use Scenario: Stable 7.5 V reference for ADC biasing and op-amp offset trimming in airborne navigation systems. IC Role / Device Role / Timing Role: Zener diode providing primary voltage reference for analog signal conditioning chain. Use Value: ±5% tolerance and <6 Ω impedance maintain sub-0.1% reference drift over temperature and time. | Use Scenario: Regulated bias rail for RF power amplifier stages in handheld military radios. IC Role / Device Role / Timing Role: Voltage clamp and reference source for GaAs FET gate bias networks. Use Value: Hermetic MELF package withstands humidity and thermal cycling encountered in field-deployed units. |
| Downhole Sensor Excitation | Missile Guidance Control Loop |
Use Scenario: Excitation voltage source for piezoresistive pressure transducers in oil/gas well logging tools. IC Role / Device Role / Timing Role: Precision zener reference enabling ratiometric measurement against bridge sensors. Use Value: -65°C to +175°C operation supports continuous function at extreme geothermal temperatures. | Use Scenario: Feedback reference in closed-loop servo amplifiers controlling fin actuation in guided munitions. IC Role / Device Role / Timing Role: Stable voltage setpoint for error amplifier in analog control circuitry. Use Value: MIL-qualified reliability ensures no parametric shift during high-G launch and sustained acceleration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N755A | Same electrical specs, but in axial-leaded DO-35 package instead of DO-213AA surface-mount. | Requires through-hole PCB assembly; unsuitable for automated SMT lines or space-constrained modules. | Select 1N755AUR-1/TR for MELF-compatible reflow processes; choose 1N755A only for legacy through-hole designs. |
| CDLL755A | Identical zener parameters and DO-213AA package, but lacks MIL-PRF-19500/127 qualification screening. | Not approved for defense/aerospace programs requiring MIL-spec documentation and lot traceability. | Use CDLL755A for commercial industrial applications where cost sensitivity outweighs qualification requirements. |
Compared with 1N755A and CDLL755A, the 1N755AUR-1/TR uniquely combines MIL-qualified reliability, hermetic MELF packaging, and ±5% tolerance - making it the sole choice for mission-critical SMT-based voltage references requiring full compliance and long-term parametric stability.
Availability
1N755AUR-1/TR is available at Aetrix Electronics and suitable for avionics power reference, tactical radio bias supply, and downhole sensor excitation requiring stable component supply across extended temperature and qualification-critical programs.
Supply support for 1N755AUR-1/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 (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog, mixed-signal, and radiation-hardened components for aerospace, defense, and industrial markets.
The 1N755AUR-1/TR belongs to Microsemi's MIL-PRF-19500/127-qualified zener diode family, engineered for precision voltage reference and regulation in mission-critical systems exposed to extreme thermal, mechanical, and environmental stress.
FAQ
What is the zener voltage tolerance for 1N755AUR-1/TR?
The 1N755AUR-1/TR has a nominal zener voltage of 7.5 V with a tolerance of ±5%, as indicated by the "A" suffix per manufacturer documentation. This tighter tolerance reduces calibration burden in precision analog circuits compared to standard ±10% variants. The 1N755AUR-1/TR maintains this specification across its full operating temperature range when properly derated.
Is 1N755AUR-1/TR compatible with reflow soldering processes?
Yes, the 1N755AUR-1/TR uses a DO-213AA (MELF) glass package rated for standard Pb-free and SnPb reflow profiles. Its hermetic construction and metallurgical bonding ensure integrity through multiple thermal cycles. The 1N755AUR-1/TR's thermal resistance (100 °C/W) and lead finish (tin/lead) support reliable SMT assembly without cracking or parameter shift.
Does 1N755AUR-1/TR meet MIL-PRF-19500/127 requirements?
Yes, the 1N755AUR-1/TR is explicitly listed in the provided documentation as available in JAN, JANTX, and JANTXV grades per MIL-PRF-19500/127. This includes full screening for temperature cycling, mechanical shock, vibration, and long-term stability - confirming its suitability for defense and aerospace applications where 1N755AUR-1/TR qualification is contractually mandated.
What is the maximum reverse leakage current for 1N755AUR-1/TR?
The maximum reverse leakage current (IR) for 1N755AUR-1/TR is 2 µA at VR = 5.0 V, measured at 25°C. This low leakage supports high-impedance reference nodes and minimizes quiescent current draw in battery-powered or energy-harvesting systems. The 1N755AUR-1/TR maintains tight IR control due to its hermetic glass encapsulation and process-controlled junction.
How does thermal derating apply to 1N755AUR-1/TR?
The 1N755AUR-1/TR is rated for 500 mW dissipation at TEC = +125°C, with linear derating of 10 mW/°C above that temperature. At +150°C end-cap temperature, usable power drops to 250 mW. This derating curve - shown in Figure 3 of the source data - must be applied in layout thermal modeling to ensure junction temperature remains within -65°C to +175°C limits. The 1N755AUR-1/TR's RθJC of 100 °C/W directly informs heatsinking requirements.
1N755AUR-1/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 7.5 V
- Tolerance:
- ±5%
- Power - Max:
- 400 mW
- Impedance (Max) (Zzt):
- 4 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 5 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-213AA
1N755AUR-1/TR FAQ
1.How can I place an order for 1N755AUR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N755AUR-1/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 1N755AUR-1/TR reliable?
The price and inventory of 1N755AUR-1/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N755AUR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N755AUR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N755AUR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N755AUR-1/TR?
1N755AUR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N755AUR-1/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 1N755AUR-1/TR?
For technical support, including 1N755AUR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N755AUR-1/TR requirements.
6.How does Aetrix verify that 1N755AUR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N755AUR-1/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 1N755AUR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N755AUR-1/TR?
All 1N755AUR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N755AUR-1/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 1N755AUR-1/TR part is unused and in its original packaging.
Return procedure for 1N755AUR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N755AUR-1/TR Tags
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