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Microchip Technology 1N755A/TR
- Part No.:
- 1N755A/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N755A/TR.pdf
- Description:
- DIODE ZENER 7.5V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:5,872
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Product details
Overview
1N755A/TR from Microsemi is a 500 mW, 7.5 V ±5% Zener diode in DO-35 glass axial package, qualified to JANTX level per MIL-PRF-19500/127, with 4 Ω dynamic impedance at 50 mA and +0.058 %/°C temperature coefficient. It provides precision voltage regulation in analog power supply reference circuits, overvoltage protection clamps, and biasing networks for military-grade instrumentation.
For engineers reviewing the 1N755A/TR datasheet, 1N755A/TR pinout, 1N755A/TR application, or 1N755A/TR equivalent, key selection criteria include its 7.5 V nominal Zener voltage, 50 mA test current, 4 Ω Zener impedance, -65°C to +175°C operating range, and DO-35 mechanical compatibility with legacy through-hole designs.
Technical Context
The 1N755A/TR operates as a reverse-biased silicon Zener regulator with metallurgical bond construction for enhanced thermal stability and radiation hardness. Its breakdown behavior is characterized at IZT = 50 mA, where VZ = 7.5 V and ZZT = 4 Ω, and it exhibits a positive temperature coefficient of +0.058 %/°C above 5 V.
Designed for high-reliability environments, the device meets MIL-PRF-19500/127 JANTX qualification, supports 0.5 W derated power dissipation (to zero at 175 °C), and maintains stable regulation across -65 °C to +175 °C junction temperature with minimal capacitance and ESD immunity per MIL-STD-750 method 1020.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 7.5 V at 50 mA - defines precise regulation point for reference and clamp circuits |
| Zener Impedance | 4 Ω at 50 mA - ensures low output impedance and tight voltage regulation under load variation |
| Power Dissipation | 0.5 W at TL = 50 °C - supports robust thermal margin in lead-mounted configurations |
| Temperature Coefficient | +0.058 %/°C - enables predictable VZ drift in high-temp industrial/military systems |
| Operating Temperature | -65 °C to +175 °C - validated for extreme-environment deployment without derating loss |
| Reverse Leakage | 2 µA at 5.0 V - guarantees low standby current in battery-powered sensing nodes |
| Package | DO-35 (DO-204AH) - standard axial-glass form factor compatible with legacy PCB tooling |
Pinout & Package
Hermetically sealed axial-leaded glass DO-35 (DO-204AH) package with cathode indicated by band; banded end is positive during Zener operation. Leads are tin-lead or RoHS-compliant matte-tin plated, solderable per MIL-STD-750 method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to circuit common; reverse-bias polarity requires cathode at higher potential |
| Cathode | Zener regulation terminal | Banded end; must be held at higher voltage than anode to enable breakdown conduction |
Key Features
| Feature | Design Value |
|---|---|
| JANTX qualification per MIL-PRF-19500/127 | Validated reliability for aerospace and defense applications requiring extended lifetime and screening |
| Metallurgical bond construction | Improves thermal cycling endurance and reduces parameter shift under mechanical stress |
| Low 4 Ω dynamic impedance at 50 mA | Minimizes output voltage deviation during transient load changes in precision references |
| Radiation-hardened per MicroNote 050 | Enables use in space-qualified systems without additional shielding or derating |
| Non-sensitive to ESD (MIL-STD-750 method 1020) | Eliminates need for on-board ESD protection in high-noise industrial control interfaces |
Applications
| Industrial Power Supply Reference | Military Sensor Biasing |
|---|---|
Use Scenario: Stable 7.5 V reference for ADC voltage dividers and op-amp feedback networks in programmable logic controllers. IC Role / Device Role / Timing Role: Zener voltage reference providing fixed regulation point independent of input ripple or load current. Use Value: Maintains ±0.375 V tolerance over full -65°C to +175°C range, enabling calibration-free operation in unheated enclosures. | Use Scenario: Biasing network for piezoresistive pressure transducers in airborne telemetry modules. IC Role / Device Role / Timing Role: Precision DC bias source ensuring consistent sensor excitation despite wide ambient swings. Use Value: +0.058 %/°C TC and JANTX qualification guarantee stable offset performance across flight altitude profiles. |
| Overvoltage Clamp Protection | Legacy Test Equipment Calibration |
Use Scenario: Input-stage clamp protecting microcontroller GPIOs from 12 V rail transients in factory automation I/O cards. IC Role / Device Role / Timing Role: Shunt regulator limiting voltage to 7.5 V ±5% before damage threshold of downstream CMOS inputs. Use Value: 2 µA leakage at 5 V prevents false triggering; 0.5 W rating absorbs repetitive 100 ms surges without degradation. | Use Scenario: Factory-trimmed reference in handheld multimeter internal calibration circuits. IC Role / Device Role / Timing Role: Primary voltage standard replacing potentiometer-based adjustments during production line calibration. Use Value: DO-35 axial form factor allows direct socket replacement; 4 Ω impedance ensures <0.2 mV error contribution at 50 mA test current. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N755A-1 | No "TR" tape-and-reel suffix; bulk or ammo pack packaging | Same electrical specs; unsuitable for automated SMT placement | Select 1N755A/TR when using pick-and-place equipment with EIA-296 compliant feeders |
| MMBZ5233BS-7-F | SOT-23 surface-mount package; 7.5 V ±5%, 200 mW rating; 7 Ω Zener impedance at 20 mA | Lower power and higher impedance limit use in high-current references or surge clamping | Choose MMBZ5233BS-7-F only for space-constrained PCBs where DO-35 footprint is unavailable |
Compared with 1N755A/TR, the 1N755A-1 offers identical regulation performance but lacks tape-and-reel packaging for automated assembly, while MMBZ5233BS-7-F trades mechanical robustness and power handling for miniaturization-neither is pin-compatible due to differing packages and thermal limits.
Availability
1N755A/TR is available at Aetrix Electronics and suitable for industrial power supply reference, military sensor biasing, overvoltage clamp protection, and legacy test equipment calibration requiring stable component supply across extended temperature ranges and long-lifecycle programs.
Supply support for 1N755A/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 components.
The 1N755A/TR belongs to Microsemi's legacy 1N7xxA series of MIL-PRF-19500/127-qualified Zener diodes, engineered for precision voltage regulation in aerospace, defense, and critical infrastructure systems where long-term parametric stability and environmental resilience are mandatory.
FAQ
What is the nominal Zener voltage and test current for the 1N755A/TR?
The 1N755A/TR has a nominal Zener voltage of 7.5 V measured at a test current (IZT) of 50 mA. This value is specified with ±5% tolerance and confirmed per Microsemi T4-LDS-0288 Rev. 1. The device maintains this regulation point across its full -65°C to +175°C operating range, making it suitable for high-stability reference applications where thermal drift must be minimized.
Is the 1N755A/TR qualified to military standards?
Yes, the 1N755A/TR is qualified to JANTX level per MIL-PRF-19500/127, including screening for vibration, shock, temperature cycling, and hermeticity. Its metallurgical bond construction and radiation hardness per MicroNote 050 further validate its suitability for aerospace and defense deployments. The "A" suffix denotes ±5% Zener tolerance, and "TR" indicates EIA-296 tape-and-reel packaging.
What is the Zener impedance of the 1N755A/TR and why does it matter?
The 1N755A/TR exhibits a maximum Zener impedance (ZZT) of 4 Ω at 50 mA. This low dynamic impedance ensures minimal output voltage variation under changing load conditions-critical in precision analog references and feedback networks. Lower ZZT directly improves regulation accuracy, especially in circuits where current draw fluctuates, such as sensor excitation or DAC reference buffers.
Does the 1N755A/TR have a positive or negative temperature coefficient?
The 1N755A/TR has a positive temperature coefficient of +0.058 %/°C at 25 °C, increasing to +0.058 %/°C at +150 °C per T4-LDS-0288. This behavior is typical for Zeners above 5 V and enables predictable, monotonic VZ drift in high-temperature environments-valuable for compensating other temperature-sensitive components in the same system.
What package type and marking does the 1N755A/TR use?
The 1N755A/TR uses the DO-35 (DO-204AH) hermetically sealed axial-glass package with cathode indicated by a visible band. It is marked with the full part number "1N755A" and complies with MIL-STD-750 method 2026 for solderability. The "TR" suffix confirms EIA-296 tape-and-reel packaging, and weight is approximately 0.2 grams.
1N755A/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 7.5 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 6 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
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AH (DO-35)
1N755A/TR FAQ
1.How can I place an order for 1N755A/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N755A/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 1N755A/TR reliable?
The price and inventory of 1N755A/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N755A/TR is usually 5 days.
3.What payment methods are accepted for 1N755A/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N755A/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N755A/TR?
1N755A/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N755A/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 1N755A/TR?
For technical support, including 1N755A/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N755A/TR requirements.
6.How does Aetrix verify that 1N755A/TR is sourced from the original manufacturer or authorized distributors?
All 1N755A/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 1N755A/TR meets industry standards.
7.What is the process for return or replacement of 1N755A/TR?
All 1N755A/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N755A/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 1N755A/TR part is unused and in its original packaging.
Return procedure for 1N755A/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N755A/TR Tags
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