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Microchip Technology 1N755
- Part No.:
- 1N755
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N755.pdf
- Description:
- DIODE ZENER 7.5V 400MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:3,176
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Product details
Overview
1N755 from Microsemi is a 500 mW, 7.5 V ±5% silicon Zener diode in DO-35 (DO-204AH) glass axial-leaded 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 supplies and analog reference circuits.
For engineers reviewing the 1N755 datasheet, 1N755 pinout, 1N755 application, or 1N755 equivalent, this page delivers verified electrical parameters, military-grade qualification context, thermal derating behavior, DO-35 mechanical dimensions, and validated alternative Zeners for stable voltage reference design.
Technical Context
The 1N755 operates as a reverse-biased voltage reference diode with nominal Zener voltage of 7.5 V at IZT = 50 mA, exhibiting low dynamic impedance (4 Ω) and positive temperature coefficient (+0.058 %/°C), enabling stable regulation across -65°C to +175°C operating range.
It features an internal metallurgical bond, hermetically sealed glass DO-35 package, cathode band polarity marking, and meets MIL-STD-750 ESD immunity (Method 1020); its 0.5 W power rating derates linearly from TL = +50°C (lead temperature) to zero at +175°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 7.5 V at 50 mA test current - defines precise regulation point for feedback loops and reference rails |
| Zener Impedance ZZT | 4 Ω at 50 mA - ensures minimal output voltage variation under load transients |
| Power Dissipation PM(AV) | 0.5 W at TL = +50°C - sets maximum continuous power handling on leads with 0.375″ length |
| Temp Coefficient αVZ | +0.058 %/°C - indicates predictable, monotonic VZ increase with junction temperature |
| Reverse Leakage IR | 2 µA at VR = 5.0 V - guarantees low quiescent current in standby bias networks |
| Max Regulator Current IZM | 50 mA - determines upper limit of stable Zener conduction before thermal runaway |
| Operating Temp Range | -65°C to +175°C - supports deployment in aerospace, downhole, and high-temp industrial environments |
Pinout & Package
DO-35 (DO-204AH) glass axial-leaded package: hermetically sealed, cathode indicated by single black band; leads are tin-lead or RoHS-compliant matte-tin plated, solderable per MIL-STD-750 Method 2026; weight ≈ 0.2 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower-potential node when used in reverse-bias regulation |
| Cathode (banded end) | Zener breakdown terminal / regulated output node | Provides stable 7.5 V referenced to anode; must be held positive relative to anode for regulation |
Key Features
| Feature | Design Value |
|---|---|
| JANTXV qualification per MIL-PRF-19500/127 | Validated reliability for mission-critical defense and space applications with full lot traceability |
| Internal metallurgical bond | Eliminates wire-bond failure modes, enhancing long-term stability under thermal cycling |
| Low dynamic impedance (4 Ω) | Minimizes output voltage ripple in precision analog references and feedback networks |
| Radiation-hardened construction | Inherently resistant to total ionizing dose (TID), per Microsemi MicroNote 050 |
| Non-sensitive to ESD (MIL-STD-750 Method 1020) | Enables safe handling without special grounding protocols during board assembly |
Applications
| Military Power Supply Regulation | Analog Voltage Reference Circuit |
|---|---|
Use Scenario: Regulating +7.5 V rail in airborne radar receiver front-end power modules exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Zener diode providing stable reference voltage for op-amp biasing and ADC reference buffers. Use Value: Maintains ±0.5% regulation accuracy over -55°C to +125°C due to +0.058%/°C TC and low ZZT. | Use Scenario: Generating precision 7.5 V reference for instrumentation amplifier gain-setting networks in field-deployed test equipment. IC Role / Device Role / Timing Role: Passive voltage reference element establishing fixed bias point for differential input stages. Use Value: Delivers <2 µA leakage at 5 V reverse bias, minimizing error current injection into high-impedance nodes. |
| High-Temperature Industrial Sensor Interface | Aerospace Avionics Bias Network |
Use Scenario: Providing regulated excitation voltage to RTD signal conditioning circuits in oil-well downhole telemetry systems. IC Role / Device Role / Timing Role: Zener regulator maintaining constant bias for bridge sensor amplifiers at up to +175°C junction temperature. Use Value: Sustains regulation integrity beyond +150°C via hermetic DO-35 package and MIL-qualified metallurgical bond. | Use Scenario: Stabilizing reference voltage for discrete transistor-based voltage regulators in satellite attitude control electronics. IC Role / Device Role / Timing Role: Primary voltage reference in radiation-tolerant discrete power management subsystems. Use Value: Leverages inherent radiation hardness (MicroNote 050) and JANTXV screening for >100 krad(Si) TID tolerance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N755AUR-1 | Same 7.5 V Zener voltage and DO-35 package, but MELF (DO-213AA) surface-mount variant with RoHS-compliant plating | Requires PCB reflow assembly instead of through-hole insertion; no lead-forming needed | Select for automated SMT production where board space and thermal mass constraints favor MELF geometry |
| 1N5236B | 7.5 V ±5%, 500 mW, DO-35, but commercial-grade only (no MIL qualification), higher ZZT (7 Ω), and wider temp range (-65°C to +200°C) | Lacks JANTXV screening and metallurgical bond; not suitable for defense/aerospace programs requiring MIL-PRF-19500 compliance | Select for cost-sensitive industrial designs where MIL spec is unnecessary and higher ZZT is acceptable |
Compared with 1N755, the 1N755AUR-1 offers identical regulation performance in a surface-mount form factor ideal for high-density layouts, while the 1N5236B provides a commercial alternative with broader temperature capability but reduced reliability assurance and higher impedance.
Availability
1N755 is available at Aetrix Electronics and suitable for military power supply regulation, analog voltage reference circuits, high-temperature industrial sensor interfaces, and aerospace avionics bias networks requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1N755 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 1N755 belongs to Microsemi's legacy 1N7xxA-1 series of MIL-PRF-19500/127-qualified Zener diodes, designed specifically for precision voltage regulation in defense, aerospace, and critical infrastructure systems demanding guaranteed performance under extreme environmental stress.
FAQ
What is the Zener voltage tolerance of the 1N755?
The 1N755 has a nominal Zener voltage of 7.5 V with a ±5% tolerance, as indicated by the "A" suffix in its nomenclature per MIL-PRF-19500/127. This means the actual measured VZ at IZT = 50 mA falls between 7.125 V and 7.875 V across the qualified temperature range.
Is the 1N755 suitable for surface-mount assembly?
No - the standard 1N755 is supplied in the axial-leaded DO-35 (DO-204AH) through-hole package. For surface-mount use, Microsemi offers the functionally equivalent 1N755AUR-1 in DO-213AA (MELF) package, which shares identical electrical specifications but requires reflow soldering instead of wave or hand soldering.
What is the maximum reverse leakage current for the 1N755?
The 1N755 specifies a maximum reverse leakage current (IR) of 2 µA at VR = 5.0 V and TJ = 25°C. This low leakage ensures minimal parasitic current draw in high-impedance reference networks and contributes to stable regulation in battery-powered or low-power analog circuits.
Does the 1N755 require heatsinking in typical operation?
No external heatsink is required for the 1N755 under standard conditions. Its 0.5 W power rating is thermally managed via lead conduction (RθJL = 250°C/W) and PCB mounting (RθJA = 300°C/W). Derating begins at TL = +50°C, reaching zero dissipation at +175°C - consistent with DO-35 thermal design limits.
How does the temperature coefficient affect the 1N755's regulation accuracy?
The 1N755 has a positive temperature coefficient of +0.058 %/°C, meaning its Zener voltage increases predictably with junction temperature. At +150°C, VZ rises by approximately +8.7% above its 25°C value - a known, linear drift that can be compensated in closed-loop systems or accounted for in calibration routines.
1N755 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:
- ±10%
- Power - Max:
- 400 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 (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AH (DO-35)
1N755 FAQ
1.How can I place an order for 1N755 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N755 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 1N755 reliable?
The price and inventory of 1N755 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N755 is usually 5 days.
3.What payment methods are accepted for 1N755?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N755 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N755?
1N755 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N755 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 1N755?
For technical support, including 1N755 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N755 requirements.
6.How does Aetrix verify that 1N755 is sourced from the original manufacturer or authorized distributors?
All 1N755 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 1N755 meets industry standards.
7.What is the process for return or replacement of 1N755?
All 1N755 units undergo pre-shipment inspection (PSI). If there is an issue with 1N755, 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 1N755 part is unused and in its original packaging.
Return procedure for 1N755:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N755 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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MM5Z5V1ST1G
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SMAJ4744A-TP
Micro Commercial Co
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SMAZ12-13-F
Diodes Incorporated
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