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Microchip Technology 1N756A/TR
- Part No.:
- 1N756A/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N756A/TR.pdf
- Description:
- DIODE ZENER 8.2V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:8,680
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Product details
Overview
1N756A/TR from Microsemi is a 500 mW, 8.2 V ±5% Zener diode in DO-35 glass axial package, qualified to JANTX level per MIL-PRF-19500/127, with 5 Ω dynamic impedance at 50 mA and +0.062 %/°C temperature coefficient - used for precision voltage reference and regulation in military power supplies and analog sensor biasing circuits.
For engineers reviewing the 1N756A/TR datasheet, 1N756A/TR pinout, 1N756A/TR application, or 1N756A/TR equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (250 °C/W junction-to-lead), reverse leakage (≤1 µA at 6.0 V), RoHS compliance status, and MIL-qualified reliability grade.
Technical Context
This device operates as a two-terminal voltage regulator in reverse breakdown, maintaining stable 8.2 V output across load current variations from 1 mA to 50 mA. Its metallurgically bonded junction ensures low noise, minimal capacitance, and radiation hardness per MicroNote 050.
Designed for high-reliability environments, it supports operation from –65 °C to +175 °C, with linear power derating from 500 mW at 50 °C lead temperature to zero at 175 °C, and exhibits +0.062 %/°C positive temperature coefficient above 5 V nominal range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 8.2 V ±5% at IZT = 50 mA - defines regulated output voltage under standard test conditions |
| Zener Impedance ZZT | 5 Ω at IZT = 50 mA - determines output voltage stability under varying load current |
| Max Reverse Current IR | ≤1 µA at VR = 6.0 V - ensures low leakage in standby or high-impedance bias networks |
| Power Dissipation PM(AV) | 500 mW at TL = 50 °C (0.375″ lead length) - sets maximum continuous thermal load capability |
| Temp Coefficient αVZ | +0.062 %/°C - quantifies voltage drift with temperature, critical for precision references |
| Junction-to-Lead RθJL | 250 °C/W - enables thermal design using lead-mount heatsinking in through-hole PCB layouts |
| Operating Temp Range | –65 °C to +175 °C - supports deployment in aerospace, downhole, and defense electronics |
Pinout & Package
DO-35 (DO-204AH) hermetically sealed glass axial package with cathode indicated by colored band; terminals 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 or lower potential node when regulating; reverse-biased during Zener operation |
| Cathode | Zener regulation output / voltage reference node | Banded end; connected to unregulated input; delivers stable 8.2 V to load when reverse-biased above breakdown |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/127 qualification | JANTX-level screening ensures reliability for defense and space applications with full lot traceability |
| Metallurgical bond construction | Eliminates wire bonds, reducing failure modes and improving thermal response and radiation tolerance |
| Low dynamic impedance | 5 Ω at 50 mA enables tight regulation (<±10 mV) under 10 mA load transients |
| Minimal junction capacitance | Enables use in RF detector and high-frequency bias applications without signal coupling degradation |
| ESD robustness | Non-sensitive per MIL-STD-750 method 1020 - survives handling without protection circuitry |
Applications
| Avionics Power Conditioning | Military Sensor Signal Conditioning |
|---|---|
Use Scenario: Regulating reference voltage for analog-to-digital converters in flight control computers operating across –55 °C to +125 °C ambient. IC Role / Device Role / Timing Role: Two-terminal shunt voltage reference providing stable 8.2 V to ADC voltage reference inputs. Use Value: Maintains <±0.5% output accuracy over temperature due to +0.062 %/°C TC and low ZZT, ensuring measurement integrity. | Use Scenario: Biasing photodiode amplifiers in infrared missile seekers exposed to thermal shock and vibration. IC Role / Device Role / Timing Role: Precision DC bias source for op-amp feedback networks in low-noise transimpedance stages. Use Value: Metallurgical bond and hermetic DO-35 package ensure long-term stability and immunity to humidity-induced drift. |
| Downhole Oilfield Instrumentation | Tactical Radio Transceiver Power Rails |
Use Scenario: Providing regulated supply for pressure transducer front-end ICs in borehole tools operating at 175 °C junction temperature. IC Role / Device Role / Timing Role: High-temperature shunt regulator stabilizing 8.2 V rail for ASIC biasing under extreme thermal stress. Use Value: Rated for continuous operation up to +175 °C with 250 °C/W RθJL, enabling direct lead-mount thermal path to chassis. | Use Scenario: Generating local reference for RF power amplifier bias control in manpack radios subjected to rapid environmental cycling. IC Role / Device Role / Timing Role: Low-capacitance Zener reference isolating sensitive RF sections from digital supply noise. Use Value: Minimal junction capacitance prevents RF coupling into bias lines, preserving spectral purity and EMI compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N756A-1 | No "TR" suffix; bulk packaging, not tape-and-reel; identical electrical specs and MIL qualification | Suitable for manual assembly or low-volume prototyping where reel feed is unnecessary | Select 1N756A/TR for automated SMT-compatible placement; choose 1N756A-1 for hand-soldered or small-batch builds |
| MMBZ5235B-TP | Surface-mount SOD-123 package; 8.2 V ±5%; 225 mW rating; commercial-grade only; no MIL qualification | Used in cost-sensitive consumer or industrial PCBs where size and reflow compatibility outweigh reliability requirements | Choose MMBZ5235B-TP only for non-military, non-extended-temperature applications with space constraints |
Compared with 1N756A/TR, the 1N756A-1 offers identical performance in bulk form but lacks tape-and-reel convenience for pick-and-place; the MMBZ5235B-TP trades MIL reliability and high-temperature capability for compactness and lower cost in commercial designs.
Availability
1N756A/TR is available at Aetrix Electronics and suitable for avionics power conditioning, military sensor signal conditioning, and downhole oilfield instrumentation requiring stable component supply with full traceability and extended temperature support.
Supply support for 1N756A/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 defense-grade analog and mixed-signal components.
The 1N756A/TR belongs to Microsemi's legacy MIL-PRF-19500/127-qualified Zener diode family, engineered for voltage regulation in mission-critical systems where long-term stability, wide temperature operation, and process-controlled reliability are mandatory.
FAQ
What is the Zener voltage tolerance of the 1N756A/TR?
The 1N756A/TR has a nominal Zener voltage of 8.2 V with a tolerance of ±5%, as indicated by the "A" suffix in its nomenclature. This tolerance applies at the specified test current of 50 mA and ambient temperature of 25 °C. The device meets JEDEC registration standards for the 1N746A–1N759A series and is verified per MIL-PRF-19500/127 screening requirements.
Is the 1N756A/TR RoHS compliant?
The 1N756A/TR is RoHS compliant only in its commercial-grade version, marked with the "e3" suffix. However, the "TR" suffix denotes tape-and-reel packaging and does not indicate RoHS status. For the 1N756A/TR specifically, RoHS compliance depends on the underlying qualification level - JANTX versions are typically non-RoHS, while commercial variants carry e3 plating. Always verify the full part number including reliability level and RoHS code before procurement.
What is the maximum power dissipation of the 1N756A/TR at 75 °C lead temperature?
At a lead temperature (TL) of 75 °C, the 1N756A/TR's average rated power dissipation is linearly derated from 500 mW at 50 °C to zero at 175 °C. Using the derating slope of 5 mW/°C, the maximum allowable power at 75 °C is 375 mW. This value assumes a 0.375 inch (9.53 mm) lead length from the diode body and is validated per Figure 1 in T4-LDS-0288 Rev. 1.
Does the 1N756A/TR have a defined forward voltage specification?
Yes, the 1N756A/TR specifies a maximum forward voltage (VF) of 1.1 V at a forward current (IF) of 200 mA, per the Maximum Ratings table. This parameter is relevant for polarity verification during functional testing and for applications involving bidirectional transient suppression where forward conduction may occur. It is measured under standardized conditions and reflects the silicon junction characteristics of the DO-35 package.
How is polarity identified on the 1N756A/TR package?
Polarity on the 1N756A/TR is indicated by a visible cathode band - a colored ring near one end of the DO-35 glass body. The banded end is the cathode and must be connected to the higher-potential side of the circuit during Zener regulation. The opposite (unbanded) end is the anode. This marking complies with industry-standard diode polarity conventions and is verified per MIL-STD-750 method 2026 for solderability and visual inspection.
1N756A/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):
- 8.2 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 8 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 6 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)
1N756A/TR FAQ
1.How can I place an order for 1N756A/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N756A/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 1N756A/TR reliable?
The price and inventory of 1N756A/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N756A/TR is usually 5 days.
3.What payment methods are accepted for 1N756A/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N756A/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N756A/TR?
1N756A/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N756A/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 1N756A/TR?
For technical support, including 1N756A/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N756A/TR requirements.
6.How does Aetrix verify that 1N756A/TR is sourced from the original manufacturer or authorized distributors?
All 1N756A/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 1N756A/TR meets industry standards.
7.What is the process for return or replacement of 1N756A/TR?
All 1N756A/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N756A/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 1N756A/TR part is unused and in its original packaging.
Return procedure for 1N756A/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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