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Microchip Technology 1N750A
- Part No.:
- 1N750A
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N750A.pdf
- Description:
- DIODE ZENER 4.7V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:4,183
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Product details
Overview
1N750A from Microsemi is a 500 mW, ±5% tolerance silicon Zener diode with nominal Zener voltage of 4.7 V at 50 mA test current, dynamic impedance of 15 Ω, and temperature coefficient of –0.043%/°C to +0.025%/°C. It features DO-35 glass axial-leaded packaging, internal metallurgical bond, and MIL-PRF-19500/127 qualification (JAN/JANTX/JANTXV levels) for voltage regulation in harsh environments.
For engineers reviewing the 1N750A datasheet, 1N750A pinout, 1N750A application, or 1N750A equivalent, key selection criteria include Zener voltage stability across –65°C to +175°C, low reverse leakage (5 µA at 1.5 V), thermal resistance of 250°C/W (junction-to-lead), RoHS-compliant commercial variants, and compatibility with legacy military-grade power supply reference designs.
Technical Context
The 1N750A operates as a two-terminal shunt voltage regulator, conducting in reverse breakdown to maintain stable output voltage under varying load and temperature conditions. Its Zener voltage is specified at IZT = 50 mA, with dynamic impedance measured using 10% rms AC superimposed on DC bias - critical for low-noise reference applications.
Designed for high-reliability systems, it exhibits inherent radiation hardness per Microsemi MicroNote 050 and ESD immunity per MIL-STD-750 Method 1020. The DO-35 package enables axial through-hole mounting with cathode band polarity marking and solderability compliant with MIL-STD-750 Method 2026.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 4.7 V ±5% at 50 mA - defines precise regulation point for low-voltage reference circuits |
| Power Dissipation | 500 mW at TL = 50°C, derating linearly to zero at 175°C - sets maximum continuous thermal load on lead-mounted PCBs |
| Dynamic Impedance ZZT | 15 Ω at 50 mA - determines output voltage variation under changing load current |
| Reverse Leakage IR | 5 µA max at VR = 1.5 V - ensures minimal quiescent current in standby mode |
| Temp Coefficient αVZ | –0.043%/°C to +0.025%/°C - quantifies voltage drift over industrial/military temperature range |
| Junction Temp Range | –65°C to +175°C - supports operation in extreme environmental conditions without derating loss |
| Thermal Resistance RθJL | 250°C/W - defines thermal path efficiency from junction to lead for heatsinking design |
Pinout & Package
DO-35 (DO-204AH) hermetically sealed glass axial-leaded package with cathode indicated by colored 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 | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground when used in standard shunt regulation configuration |
| Cathode | Reverse-biased Zener regulation terminal | Banded end; connected to unregulated input rail to clamp output voltage at 4.7 V |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/127 qualification | JAN/JANTX/JANTXV reliability levels validated for aerospace and defense systems requiring long-term stability |
| Internal metallurgical bond | Eliminates wire-bond failure mechanisms, enhancing mechanical robustness and thermal cycling endurance |
| Radiation hardness | Inherently resistant to total ionizing dose (TID), per Microsemi MicroNote 050 - suitable for space-qualified designs |
| Low capacitance | Minimizes high-frequency noise coupling in precision analog references and feedback loops |
| ESD immunity | Non-sensitive per MIL-STD-750 Method 1020 - reduces handling sensitivity during assembly and field repair |
Applications
| Industrial Power Supply Reference | Aerospace Voltage Clamp |
|---|---|
Use Scenario: Stabilizing feedback node in isolated DC-DC converter secondary-side regulation. IC Role / Device Role / Timing Role: Shunt Zener reference providing fixed 4.7 V threshold for optocoupler-driven error amplifier. Use Value: Maintains ±1% output accuracy over –40°C to +125°C ambient with <10 mV line/load regulation error. | Use Scenario: Overvoltage protection in avionics sensor interface circuits exposed to lightning-induced transients. IC Role / Device Role / Timing Role: Clamping diode limiting input rail to 4.7 V during surge events. Use Value: Survives 175°C junction temperature and meets DO-160 Section 22 surge immunity requirements. |
| Military Radio Bias Network | Test Equipment Calibration Standard |
Use Scenario: Establishing stable bias points for RF power amplifier stages in HF/VHF tactical radios. IC Role / Device Role / Timing Role: Precision voltage reference for collector biasing of discrete transistor amplifiers. Use Value: Delivers <0.5% voltage drift over 10-year shelf life due to metallurgical bond and hermetic sealing. | Use Scenario: On-board calibration reference in portable multimeters and signal generators. IC Role / Device Role / Timing Role: Primary Zener reference source traceable to NIST standards via factory calibration. Use Value: Enables ±0.1% absolute accuracy at 25°C with <5 ppm/°C TC over 0–50°C operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4732A | Same 4.7 V nominal rating but ±5% tolerance, 1 W power rating, DO-41 package | Higher power dissipation capability; less suitable for space-constrained military boards | Select when board-level thermal management allows larger footprint and higher current drive |
| BZX55C4V7 | 4.7 V ±5%, 500 mW, DO-35, but commercial-grade only (no MIL spec) | Lacks JAN/JANTXV qualification and radiation hardness; lower cost for non-critical systems | Choose for cost-sensitive industrial controls where military reliability is not required |
Compared with 1N750A, 1N4732A offers higher power margin but requires PCB layout changes due to DO-41 size, while BZX55C4V7 provides identical electrical behavior in benign environments but omits military-grade process controls and radiation assurance essential for defense platforms.
Availability
1N750A is available at Aetrix Electronics and suitable for industrial power supply reference, aerospace voltage clamp, and military radio bias network applications requiring stable component supply across extended temperature and radiation-exposed environments.
Supply support for 1N750A 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 analog and mixed-signal ICs, RF solutions, and radiation-hardened components for defense, aerospace, and industrial markets.
The 1N750A belongs to Microsemi's legacy MIL-PRF-19500/127 qualified Zener diode family, engineered specifically for voltage regulation in mission-critical systems where long-term parametric stability and environmental survivability are mandatory.
FAQ
What is the Zener voltage tolerance of the 1N750A?
The 1N750A has a nominal Zener voltage of 4.7 V with a ±5% tolerance, meaning its actual breakdown voltage falls between 4.465 V and 4.935 V at 50 mA test current and 25°C. This tolerance is defined by the "A" suffix in the part number per JEDEC nomenclature and applies across the full military temperature range.
Does the 1N750A meet MIL-PRF-19500/127 specifications?
Yes, the 1N750A is qualified to MIL-PRF-19500/127 at JAN, JANTX, and JANTXV reliability levels. This certification covers screening, testing, and process controls required for use in defense and aerospace applications, including vibration, shock, thermal cycling, and hermeticity validation.
What is the maximum reverse leakage current for the 1N750A?
The 1N750A specifies a maximum reverse leakage current (IR) of 5 µA at VR = 1.5 V and 25°C. This low leakage ensures minimal power loss in high-impedance reference networks and supports stable operation in battery-powered or ultra-low-power systems.
Can the 1N750A be used in surface-mount designs?
No, the standard 1N750A uses a DO-35 axial-leaded glass package intended for through-hole mounting. For surface-mount equivalents, Microsemi offers the 1N750AUR-1 in DO-213AA (MELF) package - same electrical specs but with cylindrical SMT geometry and RoHS compliance.
What is the thermal resistance junction-to-lead for the 1N750A?
The 1N750A has a thermal resistance of 250°C/W from junction to lead when measured at 0.375 inch (9.53 mm) lead length from body. This value is critical for calculating junction temperature rise under load and must be applied with derating curves from Figure 1 of the T4-LDS-0288 datasheet.
1N750A 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):
- 4.7 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 19 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 1.5 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)
1N750A FAQ
1.How can I place an order for 1N750A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N750A 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 1N750A reliable?
The price and inventory of 1N750A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N750A is usually 5 days.
3.What payment methods are accepted for 1N750A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N750A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N750A?
1N750A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N750A 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 1N750A?
For technical support, including 1N750A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N750A requirements.
6.How does Aetrix verify that 1N750A is sourced from the original manufacturer or authorized distributors?
All 1N750A 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 1N750A meets industry standards.
7.What is the process for return or replacement of 1N750A?
All 1N750A units undergo pre-shipment inspection (PSI). If there is an issue with 1N750A, 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 1N750A part is unused and in its original packaging.
Return procedure for 1N750A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N750A Tags
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MMBZ5240B-7-F
Diodes Incorporated
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MM5Z5V1ST1G
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