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Microchip Technology 1N750A/TR
- Part No.:
- 1N750A/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N750A/TR.pdf
- Description:
- DIODE ZENER 4.7V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:9,860
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Product details
Overview
1N750A/TR from Microsemi is a 500 mW, 4.7 V ±5% Zener diode in DO-35 glass axial package, qualified to JANTX level per MIL-PRF-19500/127, with 15 Ω dynamic impedance at 50 mA and -0.043%/°C to +0.025%/°C temperature coefficient. It provides precision voltage regulation in power supply reference and overvoltage protection circuits.
For engineers reviewing the 1N750A/TR datasheet, 1N750A/TR pinout, 1N750A/TR application, or 1N750A/TR equivalent, key selection factors include its military-grade reliability, low Zener impedance, tight thermal coefficient range, RoHS-compliant commercial variant availability, and axial-leaded DO-35 mounting compatibility with legacy through-hole designs.
Technical Context
The 1N750A/TR operates as a reverse-biased silicon Zener regulator with nominal breakdown voltage of 4.7 V at 50 mA test current (IZT), exhibiting a dual-signature temperature coefficient (-0.043%/°C at 25°C, +0.025%/°C at +150°C) indicating voltage stability across wide thermal ranges. Its internal metallurgical bond ensures robust junction integrity under thermal cycling.
Rated for 500 mW average power dissipation at 50°C lead temperature (derating to zero at 175°C), it supports operation from -65°C to +175°C with 250°C/W junction-to-lead thermal resistance. Reverse leakage is limited to ≤5 µA at 1.5 V, and forward voltage is ≤1.1 V at 200 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.7 V ±5% at IZT = 50 mA - defines stable regulation point for reference and clamp circuits |
| Dynamic Impedance (ZZT) | 15 Ω at IZT = 50 mA - determines output voltage variation under load current changes |
| Max Power Dissipation | 0.5 W at TL = 50°C - sets maximum continuous DC power handling on leads |
| Temp Coefficient (αVZ) | -0.043%/°C @ 25°C, +0.025%/°C @ +150°C - enables predictable drift compensation in wide-temp designs |
| Reverse Leakage (IR) | ≤5 µA at VR = 1.5 V - ensures minimal standby current in high-impedance bias networks |
| Junction Temp Range | -65°C to +175°C - supports operation in aerospace, downhole, and military environments |
| Package | DO-35 (DO-204AH) glass axial - provides hermetic sealing and proven reliability in legacy PCB layouts |
Pinout & Package
Hermetically sealed DO-35 (DO-204AH) glass axial package with cathode indicated by band; tin-lead or RoHS-compliant matte-tin plating; weight ≈ 0.2 g; marking includes full part number.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Non-banded end | Connected to lower-potential node during Zener operation; forward conduction path when biased positively |
| Cathode | Banded end | Connected to higher-potential node during regulation; defines Zener breakdown polarity and voltage reference polarity |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/127 qualification | JANTX-level screening ensures tested reliability for defense and space applications |
| Internal metallurgical bond | Eliminates wire-bond failure modes, enhancing long-term stability under thermal stress |
| Low capacitance | Minimizes signal coupling in RF and high-speed analog reference paths |
| ESD immunity | Non-sensitive per MIL-STD-750 Method 1020 - reduces handling and system-level ESD risk |
| Radiation hardness | Inherently radiation-tolerant per Microsemi MicroNote 050 - suitable for TID-sensitive environments |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Stable 4.7 V reference for linear regulator feedback or ADC reference divider networks in industrial control modules. IC Role / Device Role / Timing Role: Voltage reference element providing fixed potential against which other circuit voltages are measured or regulated. Use Value: 15 Ω ZZT and ±5% tolerance ensure <±23.5 mV output deviation under 50 mA load variation, supporting 12-bit accuracy. | Use Scenario: Protection of microcontroller I/O pins from transient surges in automotive body electronics. IC Role / Device Role / Timing Role: Shunt clamping device that conducts excess energy above 4.7 V to ground during ESD or load-dump events. Use Value: 500 mW rating and -65°C to +175°C operation allow reliable clamping without thermal runaway in under-hood environments. |
| Temperature-Stable Bias Network | Military Voltage Monitor |
Use Scenario: Biasing amplifier stages in avionics sensor interfaces requiring stable quiescent points across flight temperature profiles. IC Role / Device Role / Timing Role: Precision voltage source establishing DC operating point for transistor amplifiers and op-amp input stages. Use Value: Dual-signature αVZ (-0.043%/°C at 25°C, +0.025%/°C at +150°C) minimizes net drift over -55°C to +125°C operational range. | Use Scenario: Monitoring 5 V rail integrity in JANTX-qualified communication subsystems aboard tactical radios. IC Role / Device Role / Timing Role: Regulator element in comparator-based fault detection circuits verifying supply compliance before system enable. Use Value: JANTX qualification and hermetic DO-35 packaging guarantee performance continuity after 1000+ hours of accelerated life testing per MIL-PRF-19500. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4733A | Same 5.1 V nominal, but ±5% tolerance only; 14 Ω ZZT at 49 mA; commercial grade only, no MIL qualification | Lacks JANTX screening, radiation hardness, and extended temp range; unsuitable for defense programs | Select 1N4733A only for cost-sensitive commercial power supplies where MIL specs are not required |
| BZX55C4V7 | 4.7 V ±5%, 100 Ω ZZT at 5 mA; TO-92 plastic package; max 500 mW but derated faster above 75°C | Higher impedance limits regulation accuracy; plastic package lacks hermeticity and radiation tolerance | Choose BZX55C4V7 for consumer-grade board-level references where size and cost outweigh precision and reliability |
Compared with 1N750A/TR, 1N4733A offers identical voltage but lacks military qualification and thermal stability, while BZX55C4V7 trades impedance performance and environmental ruggedness for lower cost and smaller footprint-neither is pin-compatible nor drop-in replaceable due to DO-35 vs. DO-41/TO-92 mechanical mismatch.
Availability
1N750A/TR is available at Aetrix Electronics and suitable for aerospace power conditioning, defense-grade voltage monitoring, and industrial temperature-stable reference designs requiring stable component supply across extended product lifecycles.
Supply support for 1N750A/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 analog and mixed-signal components for aerospace, defense, and industrial markets.
The 1N750A/TR belongs to Microsemi's legacy MIL-PRF-19500-qualified Zener diode family, engineered specifically for voltage regulation in mission-critical systems demanding hermetic packaging, radiation tolerance, and extended temperature operation.
FAQ
What is the Zener voltage tolerance and test condition for the 1N750A/TR?
The 1N750A/TR has a nominal Zener voltage of 4.7 V with ±5% tolerance, measured at IZT = 50 mA and 25°C ambient. Voltage readings are taken 20 seconds after applying the DC test current to ensure thermal stabilization. This tolerance defines the guaranteed regulation window of 4.465 V to 4.935 V under specified conditions.
Is the 1N750A/TR suitable for high-temperature environments like aerospace applications?
Yes, the 1N750A/TR is rated for operation from -65°C to +175°C junction temperature and qualified to JANTX level per MIL-PRF-19500/127. Its hermetic DO-35 package and internal metallurgical bond support sustained reliability in engine bay, avionics bays, and satellite power systems where thermal cycling and long-term stability are critical.
Does the 1N750A/TR have RoHS-compliant plating options?
Yes, the 1N750A/TR is available with RoHS-compliant annealed matte-tin plating on commercial-grade versions. However, JANTX-qualified units retain traditional tin-lead plating to meet MIL-STD-750 solderability requirements. The "TR" suffix denotes tape-and-reel packaging per EIA-296, independent of RoHS status.
How does the temperature coefficient of the 1N750A/TR affect its regulation accuracy?
The 1N750A/TR exhibits a dual-signature temperature coefficient: -0.043%/°C at 25°C and +0.025%/°C at +150°C. This behavior reflects the crossover point near 5.1 V where Zener and avalanche mechanisms balance. In practice, it yields lower net drift over -55°C to +125°C than single-coefficient diodes, improving reference stability in wide-temp systems.
What is the maximum surge current rating for the 1N750A/TR?
The 1N750A/TR datasheet does not specify IZSM (maximum Zener surge current) for this variant. Surge capability must be derived from its 500 mW average power rating and thermal time constants. For non-repetitive transients, safe operation requires limiting peak pulse energy to ≤0.5 W × t, where t is pulse duration in seconds, and ensuring junction temperature remains below 175°C using thermal impedance curves in Figures 3–4 of T4-LDS-0288.
1N750A/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):
- 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/TR FAQ
1.How can I place an order for 1N750A/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N750A/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 1N750A/TR reliable?
The price and inventory of 1N750A/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N750A/TR is usually 5 days.
3.What payment methods are accepted for 1N750A/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N750A/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N750A/TR?
1N750A/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N750A/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 1N750A/TR?
For technical support, including 1N750A/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N750A/TR requirements.
6.How does Aetrix verify that 1N750A/TR is sourced from the original manufacturer or authorized distributors?
All 1N750A/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 1N750A/TR meets industry standards.
7.What is the process for return or replacement of 1N750A/TR?
All 1N750A/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N750A/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 1N750A/TR part is unused and in its original packaging.
Return procedure for 1N750A/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N750A/TR Tags
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