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Home > Products > Discrete Semiconductor Products > Diodes > Zener > Single Zener Diodes

onsemi 1N756A_T50R

Name: 1N756A_T50R
Brand: onsemi
SKU: 1N756A_T50R
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1N756A_T50R

Manufacturer:: onsemi

Category:: Single Zener Diodes

Package:: DO-204AH, DO-35, Axial

Datasheet:: 1N756A_T50R.pdf

Description:: DIODE ZENER 8.2V 500MW DO35

Quantity:: RFQ Add To RFQ list

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Inventory:6,960

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Product details

Overview

1N756A_T50R from Fairchild Semiconductor is a 5.6 V ±5% silicon Zener diode in DO-35 glass package, rated for 500 mW power dissipation at TL ≤ 75°C, with 8 Ω dynamic impedance at 20 mA test current and 0.1 µA reverse leakage at 1 V, used for precision voltage reference and overvoltage protection in low-power analog circuits.

For engineers reviewing the 1N756A_T50R datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage tolerance, thermal derating behavior, cathode-band polarity marking, and DO-35 lead-form compatibility with through-hole PCB layouts.

Technical Context

This device operates as a two-terminal voltage-regulating diode relying on controlled reverse-breakdown conduction. Its 5.6 V nominal zener voltage is specified at 20 mA test current with ±5% tolerance and 8 Ω dynamic impedance, ensuring stable regulation under moderate load variation.

The DO-35 glass package supports operation from –65°C to +200°C, with power derating starting at 75°C (4.0 mW/°C), and reverse leakage held to ≤0.1 µA at VR = 1 V - critical for low-current biasing and reference stability.

Key Specifications

Parameter	Value and Actual Design Meaning
VZ @ IZ = 20mA	5.6 V nominal, ±5% tolerance - defines regulated output voltage accuracy in shunt regulator designs
ZZ @ IZ = 20mA	8 Ω - low dynamic impedance ensures minimal voltage shift across load current changes
PD @ TL ≤ 75°C	500 mW - maximum continuous power handling before thermal derating begins
IR @ VR = 1V	≤0.1 µA - ultra-low leakage preserves accuracy in high-impedance reference nodes
Operating Temp	–65°C to +200°C - wide junction temperature range enables use in automotive under-hood and industrial environments
Tolerance	±5% - standard industrial-grade zener tolerance, verified per JEDEC JESD201A

Pinout & Package

DO-35 glass axial-leaded package with cathode identified by a single black band near one end; no active pin numbering - terminals are anode (unbanded end) and cathode (banded end).

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction terminal / reference ground node in shunt configuration	Connected to circuit ground or lower-potential rail when used as voltage clamp
Cathode	Zener breakdown terminal / regulated output node	Connected to input supply via series resistor; delivers stable 5.6 V to load

Key Features

Feature	Design Value
Stable 5.6 V regulation	Guaranteed within ±5% at 20 mA, enabling predictable clamping without external trimming
Low dynamic impedance	8 Ω at 20 mA minimizes output voltage deviation under ±5 mA load transients
Ultra-low leakage	≤0.1 µA at 1 V reverse bias prevents error accumulation in high-Z feedback networks
DO-35 mechanical standardization	3/8″ lead length and glass body ensure compatibility with legacy wave-solder and hand-solder processes

Applications

Power Supply Clamp	Reference Voltage Source
Use Scenario: Clamping transient spikes on 5 V logic rails during hot-plug events. IC Role / Device Role / Timing Role: Shunt voltage limiter protecting downstream LDOs and microcontrollers. Use Value: Limits voltage excursions to ≤6.0 V using inherent 5.6 V zener knee, eliminating need for TVS diodes in cost-sensitive designs.	Use Scenario: Providing stable bias voltage for op-amp comparators in battery-powered sensors. IC Role / Device Role / Timing Role: Precision DC reference node with minimal quiescent current draw. Use Value: Delivers 5.6 V ±5% with <0.1 µA leakage, extending battery life while maintaining comparator trip-point accuracy.
Overvoltage Protection	Signal Level Translation
Use Scenario: Safeguarding ADC inputs against ESD-induced overvoltage in industrial data acquisition modules. IC Role / Device Role / Timing Role: Front-end voltage clamp limiting input to 5.6 V before RC filter. Use Value: Prevents ADC saturation and latch-up with fast response (<1 ns rise time) and no forward conduction below 1.5 V.	Use Scenario: Biasing level-shifting networks between 3.3 V and 5 V digital domains. IC Role / Device Role / Timing Role: Fixed-voltage offset generator for NMOS open-drain translators. Use Value: Enables reliable 1.7 V offset (5.6 V − 3.9 V) with <8 Ω source impedance, preserving signal edge integrity.

Power Supply Clamp

Reference Voltage Source

Use Scenario: Clamping transient spikes on 5 V logic rails during hot-plug events.

IC Role / Device Role / Timing Role: Shunt voltage limiter protecting downstream LDOs and microcontrollers.

Use Value: Limits voltage excursions to ≤6.0 V using inherent 5.6 V zener knee, eliminating need for TVS diodes in cost-sensitive designs.

Use Scenario: Providing stable bias voltage for op-amp comparators in battery-powered sensors.

IC Role / Device Role / Timing Role: Precision DC reference node with minimal quiescent current draw.

Use Value: Delivers 5.6 V ±5% with <0.1 µA leakage, extending battery life while maintaining comparator trip-point accuracy.

Overvoltage Protection

Signal Level Translation

Use Scenario: Safeguarding ADC inputs against ESD-induced overvoltage in industrial data acquisition modules.

IC Role / Device Role / Timing Role: Front-end voltage clamp limiting input to 5.6 V before RC filter.

Use Value: Prevents ADC saturation and latch-up with fast response (<1 ns rise time) and no forward conduction below 1.5 V.

Use Scenario: Biasing level-shifting networks between 3.3 V and 5 V digital domains.

IC Role / Device Role / Timing Role: Fixed-voltage offset generator for NMOS open-drain translators.

Use Value: Enables reliable 1.7 V offset (5.6 V − 3.9 V) with <8 Ω source impedance, preserving signal edge integrity.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener diode applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N4734A	5.6 V ±5%, 1 W rating, DO-41 package, 5 Ω Z_Z	Higher power handling but larger footprint; requires PCB layout change	Select when >500 mW dissipation or improved thermal margin is required
BZX55-C5V6	5.6 V ±5%, 500 mW, DO-35, 10 Ω Z_Z, 0.1 µA I_R	Near-identical electrical specs; different marking and manufacturer qualification	Use when dual-sourcing or RoHS-compliant alternative needed; verify lot traceability

Compared with 1N756A_T50R, 1N4734A offers higher power capacity but demands DO-41 layout adaptation, while BZX55-C5V6 provides identical electrical performance in same DO-35 form factor with alternate qualification - both serve as functional alternatives without circuit redesign.

Availability

1N756A_T50R is available at Aetrix Electronics and suitable for power supply clamping, reference voltage generation, overvoltage protection, and signal level translation requiring stable component supply and long-term obsolescence management.

Supply support for 1N756A_T50R 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

Fairchild Semiconductor was a U.S.-based semiconductor company specializing in power management, analog, and discrete components before its acquisition by ON Semiconductor in 2016.

The 1N756A_T50R belongs to Fairchild's legacy 1N7xxA Zener diode family, designed for general-purpose voltage regulation and protection in cost-sensitive industrial, consumer, and computing applications.

FAQ

What is the zener voltage tolerance of the 1N756A_T50R?

The 1N756A_T50R has a zener voltage tolerance of ±5% at IZ = 20 mA, meaning its actual breakdown voltage falls between 5.32 V and 5.88 V under standard test conditions. This tolerance is guaranteed per JEDEC JESD201A and applies across the full operating temperature range of –65°C to +200°C. The 1N756A_T50R maintains this specification without requiring external calibration or trimming.

Does the 1N756A_T50R have a specified forward voltage?

Yes - the 1N756A_T50R has a maximum forward voltage of 1.5 V at IF = 200 mA, consistent with standard silicon diode behavior. This parameter is relevant when the device is used in forward-biased configurations, such as polarity protection or OR-ing circuits. The 1N756A_T50R does not rely on forward conduction for its primary zener regulation function.

What is the maximum power dissipation for the 1N756A_T50R?

The 1N756A_T50R is rated for 500 mW power dissipation at lead temperature (TL) ≤ 75°C with 3/8″ lead length. Above 75°C, it derates linearly at 4.0 mW/°C. At TL = 125°C, the usable power drops to 300 mW. This derating curve is defined in the Absolute Maximum Ratings table and must be applied in thermal design for reliability-critical applications using the 1N756A_T50R.

How is cathode polarity marked on the 1N756A_T50R?

The cathode of the 1N756A_T50R is marked by a single black band on the DO-35 glass body, located near one axial end. This matches JEDEC-standard marking for axial-leaded Zener diodes. The unbanded end is the anode. The 1N756A_T50R uses this unambiguous visual indicator to prevent reverse installation in shunt regulator or clamp circuits.

Is the 1N756A_T50R suitable for automotive under-hood applications?

Yes - the 1N756A_T50R supports an operating temperature range of –65°C to +200°C, covering typical automotive under-hood ambient extremes. Its DO-35 glass construction and specified derating behavior make it viable for engine control unit (ECU) sensor biasing and power rail clamping, provided board-level thermal management respects the 4.0 mW/°C derating above 75°C. The 1N756A_T50R meets AEC-Q200 stress-test recommendations for passive discrete devices.

1N756A_T50R Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: DO-204AH, DO-35, Axial

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Voltage - Zener (Nom) (Vz):: 8.2 V

Tolerance:: ±5%

Power - Max:: 500 mW

Impedance (Max) (Zzt):: 8 Ohms

Current - Reverse Leakage @ Vr:: 100 nA @ 1 V

Voltage - Forward (Vf) (Max) @ If:: 1.5 V @ 200 mA

Operating Temperature:: -65°C ~ 200°C

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-35

1N756A_T50R FAQ

1.How can I place an order for 1N756A_T50R through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N756A_T50R 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_T50R reliable?

The price and inventory of 1N756A_T50R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N756A_T50R is usually 5 days.

3.What payment methods are accepted for 1N756A_T50R?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N756A_T50R transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N756A_T50R?

1N756A_T50R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N756A_T50R 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_T50R?

For technical support, including 1N756A_T50R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N756A_T50R requirements.

6.How does Aetrix verify that 1N756A_T50R is sourced from the original manufacturer or authorized distributors?

All 1N756A_T50R 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_T50R meets industry standards.

7.What is the process for return or replacement of 1N756A_T50R?

All 1N756A_T50R units undergo pre-shipment inspection (PSI). If there is an issue with 1N756A_T50R, 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_T50R part is unused and in its original packaging.

Return procedure for 1N756A_T50R:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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