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

onsemi 1N750A_T50A

Name: 1N750A_T50A
Brand: onsemi
SKU: 1N750A_T50A
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1N750A_T50A

Manufacturer:: onsemi

Category:: Single Zener Diodes

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

Datasheet:: 1N750A_T50A.pdf

Description:: DIODE ZENER 4.7V 500MW DO35

Quantity:: RFQ Add To RFQ list

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Inventory:6,016

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Product details

Overview

1N750A_T50A from Fairchild Semiconductor is a 4.7 V ±5% silicon Zener diode in DO-35 glass package, rated for 500 mW power dissipation at TL ≤ 75°C, with 19 Ω dynamic impedance at 20 mA and 30 µA reverse leakage at 1 V, used for precision voltage regulation and reference in low-power analog circuits.

For engineers reviewing the 1N750A_T50A 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-reference diode relying on controlled reverse-breakdown conduction. Its 4.7 V nominal zener voltage is specified at 20 mA test current, with 5% tolerance and 19 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 features a visible cathode band for unambiguous polarity identification during manual assembly or inspection.

Key Specifications

Parameter	Value and Actual Design Meaning
V_Z @ I_Z = 20 mA	4.47–4.94 V; defines regulated output voltage range under standard test condition
Z_Z @ I_Z = 20 mA	19 Ω; quantifies voltage change per mA of current shift-lower value improves regulation stability
P_D @ T_L ≤ 75°C	500 mW; maximum continuous power before thermal derating begins
I_R @ V_R = 1 V	2 µA; reverse leakage at sub-breakdown voltage-critical for low-current bias networks
Tolerance	±5%; determines absolute accuracy of voltage reference without trimming
Package	DO-35 glass; axial-leaded, hermetically sealed, compatible with wave-soldering and manual insertion

Pinout & Package

DO-35 glass package with axial leads: anode (unmarked end) and cathode (band-marked end). No internal terminals beyond the two leads; polarity must be observed for correct reverse-bias operation.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry / Reverse current exit	Connected to lower-potential node in zener regulator configuration
Cathode	Forward current exit / Reverse current entry	Marked with color band; connected to higher-potential node to enable reverse breakdown

Key Features

Feature	Design Value
±5% V_Z tolerance	Enables use as a factory-calibrated reference without external trimming in cost-sensitive designs
19 Ω dynamic impedance	Minimizes output voltage drift across 5–30 mA load current variations in shunt regulator topologies
DO-35 glass construction	Provides hermetic sealing and high-temperature capability (–65°C to +200°C) for harsh-environment applications
Cathode band marking	Ensures reliable visual polarity identification during manual placement and post-assembly inspection

Applications

Power Supply Reference	Overvoltage Clamp
Use Scenario: Low-current voltage reference in linear regulator feedback networks or ADC reference dividers. IC Role / Device Role / Timing Role: Zener diode providing stable 4.7 V reference point independent of supply ripple. Use Value: Delivers ±5% accuracy and <20 Ω impedance to maintain reference stability across temperature and load.	Use Scenario: Protection circuit limiting input voltage to sensitive analog front-ends or microcontroller I/O pins. IC Role / Device Role / Timing Role: Shunt clamping element diverting excess current when voltage exceeds 4.94 V. Use Value: Activates at predictable threshold with 2 µA leakage below clamp point, minimizing standby power loss.
Current Source Bias	Temperature-Stable Oscillator Bias
Use Scenario: Constant-current source for LED biasing or transistor base bias in discrete amplifiers. IC Role / Device Role / Timing Role: Voltage reference enabling resistor-defined current via Ohm's law (I = (V_IN − 4.7 V)/R). Use Value: Maintains current accuracy within ±5% over –40°C to +85°C ambient due to low thermal coefficient.	Use Scenario: Bias network in RC relaxation oscillators requiring stable threshold voltage. IC Role / Device Role / Timing Role: Sets precise switching threshold for comparator inputs in timing circuits. Use Value: Enables repeatable frequency generation with <1% variation across production lots and temperature.

Power Supply Reference

Overvoltage Clamp

Use Scenario: Low-current voltage reference in linear regulator feedback networks or ADC reference dividers.

IC Role / Device Role / Timing Role: Zener diode providing stable 4.7 V reference point independent of supply ripple.

Use Value: Delivers ±5% accuracy and <20 Ω impedance to maintain reference stability across temperature and load.

Use Scenario: Protection circuit limiting input voltage to sensitive analog front-ends or microcontroller I/O pins.

IC Role / Device Role / Timing Role: Shunt clamping element diverting excess current when voltage exceeds 4.94 V.

Use Value: Activates at predictable threshold with 2 µA leakage below clamp point, minimizing standby power loss.

Current Source Bias

Temperature-Stable Oscillator Bias

Use Scenario: Constant-current source for LED biasing or transistor base bias in discrete amplifiers.

IC Role / Device Role / Timing Role: Voltage reference enabling resistor-defined current via Ohm's law (I = (V_IN − 4.7 V)/R).

Use Value: Maintains current accuracy within ±5% over –40°C to +85°C ambient due to low thermal coefficient.

Use Scenario: Bias network in RC relaxation oscillators requiring stable threshold voltage.

IC Role / Device Role / Timing Role: Sets precise switching threshold for comparator inputs in timing circuits.

Use Value: Enables repeatable frequency generation with <1% variation across production lots and temperature.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N4732A	Same 4.7 V nominal rating, but ±5% tolerance and 14 Ω Z_Z; DO-41 package (larger, higher power)	Higher power handling (1 W vs. 0.5 W); less suitable for space-constrained DO-35 footprints	Select when higher surge current or board-level thermal margin is required
BZX55-C4V7	4.7 V ±5%, 100 nA I_R @ 1 V (vs. 2 µA), DO-35 package, but tighter tempco and tighter lot-to-lot V_Z distribution	Better long-term stability and lower leakage-preferred for battery-powered precision references	Select when ultra-low leakage or extended lifetime calibration stability is critical

Compared with 1N750A_T50A, 1N4732A offers higher power but requires PCB layout changes, while BZX55-C4V7 delivers superior leakage and stability at comparable footprint-choice depends on priority between cost, size, and long-term reference drift.

Availability

1N750A_T50A is available at Aetrix Electronics and suitable for voltage reference, overvoltage protection, and bias network applications requiring stable component supply across industrial control, instrumentation, and legacy analog design programs.

Supply support for 1N750A_T50A 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 1N750A_T50A belongs to Fairchild's legacy 1N7xxA Zener series designed for general-purpose voltage regulation in cost-sensitive, low-power analog systems where DO-35 form factor and ±5% accuracy meet system requirements.

FAQ

What is the nominal zener voltage and tolerance of the 1N750A_T50A?

The 1N750A_T50A has a nominal zener voltage of 4.7 V with a tolerance of ±5%, meaning its actual breakdown voltage falls between 4.47 V and 4.94 V when tested at 20 mA and 25°C. This tolerance is factory-trimmed and applies across the full operating temperature range, making the 1N750A_T50A suitable for non-critical reference applications where external calibration is not required.

What is the maximum power dissipation and thermal derating behavior of the 1N750A_T50A?

The 1N750A_T50A is rated for 500 mW power dissipation at lead temperature (T_L) ≤ 75°C in a DO-35 package with 3/8″ lead length. Above 75°C, it derates linearly at 4.0 mW/°C. This means at 125°C lead temperature, its usable power drops to 300 mW. Engineers must account for this in thermally constrained layouts or high-ambient environments.

How is polarity identified on the 1N750A_T50A package?

The 1N750A_T50A uses a cathode band-a visible color ring near one end of the DO-35 glass body-to indicate the cathode terminal. The unmarked end is the anode. This marking complies with JEDEC standards and enables rapid visual verification during manual assembly, rework, or automated optical inspection (AOI) in production.

What is the dynamic impedance (Z_Z) of the 1N750A_T50A and why does it matter?

The 1N750A_T50A exhibits 19 Ω dynamic impedance at 20 mA test current. This parameter quantifies how much the zener voltage changes per unit change in current-lower Z_Z yields tighter regulation under varying load conditions. In practice, this allows the 1N750A_T50A to maintain stable reference voltage across typical shunt regulator current swings of ±5 mA.

Can the 1N750A_T50A be used in place of the 1N750A without modification?

Yes-the "_T50A" suffix denotes tape-and-reel packaging per Fairchild's ordering convention and does not alter electrical or mechanical specifications. The 1N750A_T50A shares identical zener voltage, impedance, leakage, package (DO-35), and marking with the bulk 1N750A. Both are interchangeable in schematic design and PCB layout.

1N750A_T50A Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

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

Packaging:: Tape & Box (TB)

Product Status:: Obsolete

Voltage - Zener (Nom) (Vz):: 4.7 V

Tolerance:: ±5%

Power - Max:: 500 mW

Impedance (Max) (Zzt):: 19 Ohms

Current - Reverse Leakage @ Vr:: 2 µA @ 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

1N750A_T50A FAQ

1.How can I place an order for 1N750A_T50A through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N750A_T50A 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_T50A reliable?

The price and inventory of 1N750A_T50A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N750A_T50A is usually 5 days.

3.What payment methods are accepted for 1N750A_T50A?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N750A_T50A transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N750A_T50A?

1N750A_T50A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N750A_T50A 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_T50A?

For technical support, including 1N750A_T50A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N750A_T50A requirements.

6.How does Aetrix verify that 1N750A_T50A is sourced from the original manufacturer or authorized distributors?

All 1N750A_T50A 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_T50A meets industry standards.

7.What is the process for return or replacement of 1N750A_T50A?

All 1N750A_T50A units undergo pre-shipment inspection (PSI). If there is an issue with 1N750A_T50A, 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_T50A part is unused and in its original packaging.

Return procedure for 1N750A_T50A:

1.Submit a request within 90 days.

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

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