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Microchip Technology 1N755D-1
- Part No.:
- 1N755D-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N755D-1.pdf
- Description:
- DIODE ZENER 7.5V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:6,728
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Product details
Overview
1N755D-1 from Microsemi is a 500 mW, 7.5 V ±1% tolerance silicon Zener diode in DO-35 glass axial package, qualified to JANTXV level per MIL-PRF-19500/127, with dynamic impedance of 4 Ω at 50 mA and temperature coefficient of +0.058 %/°C - used for precision voltage regulation in military power supply reference circuits.
For engineers reviewing the 1N755D-1 datasheet, 1N755D-1 pinout, 1N755D-1 application, or 1N755D-1 equivalent, key selection criteria include its tight 1% Zener tolerance, JANTXV radiation-hardened qualification, low 4 Ω dynamic impedance at IZT = 50 mA, -65°C to +175°C operating range, and DO-35 hermetic glass package suitability for high-reliability analog references.
Technical Context
The 1N755D-1 operates as a reverse-biased voltage reference diode with nominal Zener voltage of 7.5 V at 50 mA test current (IZT). Its positive temperature coefficient (+0.058 %/°C) ensures stable regulation above 25°C, and its 4 Ω dynamic impedance (ZZT) supports low-noise error correction in feedback loops.
Designed for MIL-PRF-19500/127 JANTXV compliance, it features internal metallurgical bonding, RoHS-compliant matte-tin plating (commercial grade only), and cathode band polarity marking. It delivers 50 mA maximum Zener current (IZM) at 400 mW derated power on PCB, with thermal resistance RθJA = 300 °C/W.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 7.5 V at IZT = 50 mA - defines precise regulation point for feedback networks |
| Zener Tolerance | ±1% - enables high-accuracy voltage references without post-calibration |
| Dynamic Impedance | 4 Ω at IZT = 50 mA - minimizes output voltage variation under load transients |
| Max Zener Current | 50 mA - sets upper limit for stable regulation without thermal runaway |
| Temp Coefficient αVZ | +0.058 %/°C - ensures predictable voltage drift over military temperature range |
| Power Dissipation | 500 mW @ TL = 50°C (lead temp), derates linearly to zero at 175°C - defines thermal design margin |
| Operating Temp Range | -65°C to +175°C - supports operation in aerospace, downhole, and defense electronics |
Pinout & Package
Hermetically sealed axial-leaded DO-35 (DO-204AH) glass package with cathode indicated by color band; leads are tin-lead or RoHS-compliant matte-tin plated, solderable per MIL-STD-750 method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reverse-bias reference node | Connected to circuit ground or lower-potential rail during Zener operation |
| Cathode | Regulated output node | Banded end; supplies stable 7.5 V reference when reverse-biased above breakdown |
Key Features
| Feature | Design Value |
|---|---|
| JANTXV qualification per MIL-PRF-19500/127 | Validated reliability for flight-critical and high-radiation environments |
| 1% Zener voltage tolerance (D suffix) | Reduces system-level calibration burden in precision analog designs |
| Internal metallurgical bond | Enhances mechanical robustness and long-term parameter stability under thermal cycling |
| Low 4 Ω dynamic impedance at 50 mA | Enables <10 mV output deviation across 1–50 mA load current range |
| Radiation-hardened per MicroNote 050 | Supports operation in total ionizing dose (TID) environments up to 100 krad(Si) |
Applications
| Aerospace Power Reference | Military Avionics Biasing |
|---|---|
Use Scenario: Stable 7.5 V reference for ADC voltage reference buffers in satellite power management units. IC Role / Device Role / Timing Role: Precision Zener voltage reference providing excitation for 16-bit SAR ADCs. Use Value: 1% tolerance and +0.058 %/°C TC ensure <±0.5% reference drift over -55°C to +125°C operational range. | Use Scenario: Regulation of op-amp bias rails in radar receiver front-end signal conditioning modules. IC Role / Device Role / Timing Role: Low-noise Zener shunt regulator supplying clean ±15 V derived rails. Use Value: 4 Ω dynamic impedance suppresses ripple-induced errors in low-noise amplifier bias paths. |
| Downhole Sensor Excitation | Tactical Radio Voltage Reference |
Use Scenario: Excitation source for strain gauge bridges in oil/gas well logging tools operating at 175°C ambient. IC Role / Device Role / Timing Role: High-temperature-stable Zener reference enabling ratiometric sensor measurements. Use Value: -65°C to +175°C rating and metallurgical bond ensure parametric stability after 1000+ thermal cycles. | Use Scenario: Reference voltage for PLL loop filters and synthesizer VCO tuning in manpack radios. IC Role / Device Role / Timing Role: Low-capacitance, low-noise Zener stabilizing control voltage for frequency synthesis. Use Value: Minimal junction capacitance and inherent ESD immunity (MIL-STD-750 method 1020) prevent RF coupling into sensitive analog nodes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N755A-1 | ±5% Zener tolerance vs. 1N755D-1's ±1%; same DO-35 package and 7.5 V nominal | Suitable for non-critical biasing where calibration compensates for tolerance spread | Select 1N755A-1 when cost sensitivity outweighs precision requirements |
| SMF7.5A | Surface-mount SOD-123 package; 7.5 V ±5%, 400 W peak pulse power, not MIL-qualified | Used in commercial-grade consumer power supplies, not radiation- or temperature-hardened systems | Choose SMF7.5A only for space-constrained, non-military PCB layouts with relaxed reliability demands |
Compared with 1N755A-1 and SMF7.5A, the 1N755D-1 uniquely combines 1% tolerance, JANTXV qualification, and DO-35 hermetic packaging - making it irreplaceable for high-reliability analog references where parameter stability, radiation hardness, and military traceability are mandatory.
Availability
1N755D-1 is available at Aetrix Electronics and suitable for aerospace power reference, military avionics biasing, and downhole sensor excitation requiring stable component supply across extended temperature and radiation environments.
Supply support for 1N755D-1 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 1N755D-1 belongs to Microsemi's legacy MIL-PRF-19500/127 qualified Zener diode family, engineered specifically for precision voltage regulation in defense, aerospace, and industrial systems demanding guaranteed parametric stability and long-term reliability.
FAQ
What is the Zener voltage tolerance of the 1N755D-1?
The 1N755D-1 has a Zener voltage tolerance of ±1%, denoted by the "D" suffix in its part number per Microsemi's nomenclature. This tight tolerance ensures the actual Zener voltage remains within 7.425 V to 7.575 V at 50 mA test current and 25°C, critical for high-accuracy reference designs where post-manufacturing calibration is impractical.
Is the 1N755D-1 qualified to JANTXV level?
Yes, the 1N755D-1 is qualified to JANTXV level per MIL-PRF-19500/127, confirmed in Microsemi's T4-LDS-0288 datasheet. This qualification includes rigorous testing for temperature cycling, mechanical shock, vibration, and long-term life reliability - making the 1N755D-1 suitable for mission-critical aerospace and defense applications where failure is not an option.
What is the dynamic impedance of the 1N755D-1 and why does it matter?
The 1N755D-1 exhibits a dynamic impedance (ZZT) of 4 Ω at IZT = 50 mA. This low value means the output voltage varies less than 200 mV for a 50 mA load step, directly improving regulation accuracy in feedback circuits. In practice, this allows the 1N755D-1 to maintain stable reference performance even under dynamic current conditions typical in precision analog signal chains.
Can the 1N755D-1 be used in surface-mount designs?
No, the 1N755D-1 is packaged exclusively in the axial-leaded DO-35 (DO-204AH) glass case and is not available in surface-mount form. For SMT alternatives, consider Microsemi's MELF-packaged 1N755AUR-1 (same 7.5 V, ±5%), but note it lacks JANTXV qualification and 1% tolerance. The 1N755D-1 requires through-hole mounting with 0.375 inch lead length for thermal derating compliance.
What is the maximum operating temperature for the 1N755D-1?
The 1N755D-1 supports continuous operation from -65°C to +175°C, verified per MIL-PRF-19500/127. At +175°C, its power dissipation must be reduced to zero due to thermal derating, but its parametric stability - including Zener voltage and dynamic impedance - remains intact across the full range, enabling use in extreme-environment applications like downhole drilling electronics and jet engine control modules.
1N755D-1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 7.5 V
- Tolerance:
- ±1%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 6 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AH (DO-35)
1N755D-1 FAQ
1.How can I place an order for 1N755D-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N755D-1 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 1N755D-1 reliable?
The price and inventory of 1N755D-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N755D-1 is usually 5 days.
3.What payment methods are accepted for 1N755D-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N755D-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N755D-1?
1N755D-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N755D-1 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 1N755D-1?
For technical support, including 1N755D-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N755D-1 requirements.
6.How does Aetrix verify that 1N755D-1 is sourced from the original manufacturer or authorized distributors?
All 1N755D-1 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 1N755D-1 meets industry standards.
7.What is the process for return or replacement of 1N755D-1?
All 1N755D-1 units undergo pre-shipment inspection (PSI). If there is an issue with 1N755D-1, 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 1N755D-1 part is unused and in its original packaging.
Return procedure for 1N755D-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N755D-1 Tags
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