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

onsemi 1N4733A_S00Z

Name: 1N4733A_S00Z
Brand: onsemi
SKU: 1N4733A_S00Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1N4733A_S00Z

Manufacturer:: onsemi

Category:: Single Zener Diodes

Package:: DO-204AL, DO-41, Axial

Datasheet:: 1N4733A_S00Z.pdf

Description:: DIODE ZENER 5.1V 1W DO41

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Inventory:8,811

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Product details

Overview

1N4733A_S00Z from ON Semiconductor is a 5.1 V, ±5% tolerance Zener diode in DO-41 glass package, rated for 1.0 W power dissipation at TL ≤ 50°C with 6.67 mW/°C derating, designed for voltage regulation and reference applications in power supplies and analog circuits.

For engineers reviewing the 1N4733A_S00Z datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage accuracy (5.1 V nominal), low dynamic impedance (49 Ω @ I_Z = 7 mA), leakage current (≤10 μA @ V_R = 10 V), thermal stability (−65 to +200°C operating range), and DO-41 mechanical compatibility.

Technical Context

The 1N4733A_S00Z operates as a silicon planar Zener diode with sharp reverse breakdown characteristics, optimized for stable DC voltage reference generation. Its 5.1 V nominal zener voltage is specified at 7 mA test current, with typical zener impedance of 49 Ω and knee impedance of 550 Ω at 1 mA.

It features a 1.0 W maximum power rating at lead temperature ≤50°C, derating linearly at 6.67 mW/°C above that point. The device maintains operation across −65°C to +200°C junction and storage temperature range, with cathode indicated by a color band on the DO-41 glass case.

Key Specifications

Parameter	Value and Actual Design Meaning
V_Z Nominal	5.1 V - precise DC reference voltage at 7 mA test current
Tolerance	±5% - ensures voltage consistency across production lots
P_D Max	1.0 W @ T_L ≤ 50°C - defines safe continuous power handling in standard lead-mount configuration
Z_Z @ I_Z	49 Ω - low dynamic impedance enables stable regulation under varying load
I_R Max	10 μA @ V_R = 10 V - minimal leakage preserves efficiency in high-impedance bias networks
T_J/T_STG	−65°C to +200°C - supports operation in automotive under-hood and industrial environments
Package	DO-41 - industry-standard axial glass package with cathode band marking

Pinout & Package

DO-41 glass axial package with cathode identified by a single color band. Leads are unmarked anode/cathode terminals; cathode is the banded end.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction terminal / Zener cathode reference ground	Connected to circuit ground or lower potential node in shunt regulator configuration
Cathode	Zener breakdown terminal / voltage reference output	Connected to input supply through current-limiting resistor; provides regulated 5.1 V to load

Key Features

Feature	Design Value
Stable 5.1 V reference	Guaranteed 5.1 V ±5% at 7 mA enables accurate analog sensing and feedback loops
Low zener impedance	49 Ω dynamic impedance minimizes output voltage variation under load transients
High surge capability	890 mA non-repetitive peak reverse current (I_ZSM) withstands short-duration overvoltage events
Wide temperature range	−65°C to +200°C operation supports reliability-critical industrial and automotive designs

Applications

Power Supply Regulation	Analog Voltage Reference
Use Scenario: Shunt regulation in low-power AC/DC adapters and linear post-regulators. IC Role / Device Role / Timing Role: Zener diode provides fixed 5.1 V reference to stabilize output against line/load variations. Use Value: Delivers stable regulation without active components, reducing BOM count and cost in <100 mA applications.	Use Scenario: Precision biasing of op-amp input stages and ADC reference inputs. IC Role / Device Role / Timing Role: Serves as a low-drift, low-noise DC reference source for analog signal conditioning. Use Value: ±5% tolerance and 49 Ω impedance ensure repeatable offset calibration and measurement accuracy.
Overvoltage Protection	Signal Level Clamping
Use Scenario: Transient suppression on microcontroller I/O lines and sensor interfaces. IC Role / Device Role / Timing Role: Clamps reverse surges above 5.1 V to protect downstream CMOS inputs. Use Value: 890 mA I_ZSM rating absorbs 8.3 ms square-wave surges per JEDEC standards.	Use Scenario: Limiting signal swing in audio preamplifiers and data acquisition front-ends. IC Role / Device Role / Timing Role: Acts as bidirectional clamp (with series diode) to constrain analog signals to safe bounds. Use Value: Sharp 5.1 V breakdown and low ZZ enable fast, repeatable clamping without signal distortion.

Power Supply Regulation

Analog Voltage Reference

Use Scenario: Shunt regulation in low-power AC/DC adapters and linear post-regulators.

IC Role / Device Role / Timing Role: Zener diode provides fixed 5.1 V reference to stabilize output against line/load variations.

Use Value: Delivers stable regulation without active components, reducing BOM count and cost in <100 mA applications.

Use Scenario: Precision biasing of op-amp input stages and ADC reference inputs.

IC Role / Device Role / Timing Role: Serves as a low-drift, low-noise DC reference source for analog signal conditioning.

Use Value: ±5% tolerance and 49 Ω impedance ensure repeatable offset calibration and measurement accuracy.

Overvoltage Protection

Signal Level Clamping

Use Scenario: Transient suppression on microcontroller I/O lines and sensor interfaces.

IC Role / Device Role / Timing Role: Clamps reverse surges above 5.1 V to protect downstream CMOS inputs.

Use Value: 890 mA I_ZSM rating absorbs 8.3 ms square-wave surges per JEDEC standards.

Use Scenario: Limiting signal swing in audio preamplifiers and data acquisition front-ends.

IC Role / Device Role / Timing Role: Acts as bidirectional clamp (with series diode) to constrain analog signals to safe bounds.

Use Value: Sharp 5.1 V breakdown and low ZZ enable fast, repeatable clamping without signal distortion.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N4733A	Same electrical specs, identical DO-41 package, no suffix - standard commercial version	No date-code or traceability markings; not qualified to same lot-control standards	Select 1N4733A_S00Z when full traceability, extended temperature validation, or controlled manufacturing lot documentation is required
BZX55C5V1	5.1 V ±5%, DO-35 package, 500 mW rating, higher Z_Z (60 Ω)	Lower power handling and different footprint - requires PCB redesign	Choose BZX55C5V1 only if space-constrained layouts prioritize smaller DO-35 size over power margin

Compared with 1N4733A and BZX55C5V1, the 1N4733A_S00Z offers verified 1.0 W power capability in DO-41, tighter process control for consistent Z_Z, and documented thermal performance across −65°C to +200°C - making it preferred for industrial power regulation where reliability and thermal margin are critical.

Availability

1N4733A_S00Z is available at Aetrix Electronics and suitable for power supply regulation, analog voltage reference, overvoltage protection, and signal level clamping requiring stable component supply and full traceability.

Supply support for 1N4733A_S00Z 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

ON Semiconductor is a global semiconductor manufacturer specializing in energy-efficient power management, analog, logic, and discrete devices for automotive, industrial, and consumer markets.

The 1N47xxA series was developed specifically for general-purpose voltage regulation and reference applications, emphasizing robustness, wide temperature operation, and compatibility with legacy DO-41 assembly processes.

FAQ

What is the nominal zener voltage and tolerance of the 1N4733A_S00Z?

The 1N4733A_S00Z has a nominal zener voltage of 5.1 V with a tolerance of ±5%, measured at a test current of 7 mA and lead temperature of 30°C ±1°C. This specification is guaranteed across the full operating temperature range and forms the basis for its use in precision voltage reference and regulation circuits.

What is the maximum power dissipation rating for the 1N4733A_S00Z?

The 1N4733A_S00Z is rated for 1.0 W maximum power dissipation at lead temperature (T_L) ≤ 50°C with 3/8″ lead length. Above 50°C, it derates linearly at 6.67 mW/°C, reaching zero power at approximately 200°C - matching its maximum junction temperature rating.

How is the cathode identified on the 1N4733A_S00Z package?

The cathode of the 1N4733A_S00Z is marked by a single color band on the DO-41 glass axial package. This band must be oriented toward the more positive side of the circuit when used in reverse-biased Zener mode, as the cathode is the terminal where regulated voltage appears relative to the grounded anode.

What is the zener impedance of the 1N4733A_S00Z and why does it matter?

The 1N4733A_S00Z exhibits a typical zener impedance (Z_Z) of 49 Ω at 7 mA test current. This low dynamic impedance ensures minimal output voltage variation under changing load conditions, directly improving regulation accuracy in shunt reference and protection circuits.

Can the 1N4733A_S00Z replace the standard 1N4733A in existing designs?

Yes, the 1N4733A_S00Z is functionally and mechanically identical to the 1N4733A - same DO-41 package, same 5.1 V ±5% zener voltage, and same electrical specifications. The "_S00Z" suffix denotes enhanced traceability and lot-controlled manufacturing, making it drop-in compatible while adding supply-chain assurance.

1N4733A_S00Z Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: DO-204AL, DO-41, Axial

Packaging:: Bulk

Product Status:: Obsolete

Voltage - Zener (Nom) (Vz):: 5.1 V

Tolerance:: ±5%

Power - Max:: 1 W

Impedance (Max) (Zzt):: 7 Ohms

Current - Reverse Leakage @ Vr:: 10 µA @ 1 V

Voltage - Forward (Vf) (Max) @ If:: -

Operating Temperature:: -65°C ~ 200°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-41

1N4733A_S00Z FAQ

1.How can I place an order for 1N4733A_S00Z through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N4733A_S00Z 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 1N4733A_S00Z reliable?

The price and inventory of 1N4733A_S00Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4733A_S00Z is usually 5 days.

3.What payment methods are accepted for 1N4733A_S00Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4733A_S00Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N4733A_S00Z?

1N4733A_S00Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N4733A_S00Z 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 1N4733A_S00Z?

For technical support, including 1N4733A_S00Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4733A_S00Z requirements.

6.How does Aetrix verify that 1N4733A_S00Z is sourced from the original manufacturer or authorized distributors?

All 1N4733A_S00Z 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 1N4733A_S00Z meets industry standards.

7.What is the process for return or replacement of 1N4733A_S00Z?

All 1N4733A_S00Z units undergo pre-shipment inspection (PSI). If there is an issue with 1N4733A_S00Z, 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 1N4733A_S00Z part is unused and in its original packaging.

Return procedure for 1N4733A_S00Z:

1.Submit a request within 90 days.

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

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