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

onsemi 1N5228B_S00Z

Name: 1N5228B_S00Z
Brand: onsemi
SKU: 1N5228B_S00Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1N5228B_S00Z

Manufacturer:: onsemi

Category:: Single Zener Diodes

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

Datasheet:: 1N5228B_S00Z.pdf

Description:: DIODE ZENER 3.9V 500MW DO35

Quantity:: RFQ Add To RFQ list

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Inventory:9,978

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Product details

Overview

1N5228B_S00Z from ON Semiconductor is a 3.9 V ±5% Zener diode in DO-35 glass package, rated for 500 mW power dissipation and 20 mA test current, with 23 Ω dynamic impedance and 10 μA reverse leakage at 2.94 V. It provides precision voltage regulation in low-power analog reference and overvoltage protection circuits.

For engineers reviewing the 1N5228B_S00Z datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, thermal derating behavior, cathode identification, and direct-fit alternatives for legacy Fairchild-designated designs requiring Zener stabilization at 3.9 V.

Technical Context

This device operates as a two-terminal voltage reference using avalanche breakdown in a hermetically sealed DO-35 glass package. Its 3.9 V nominal Zener voltage is specified at I_Z = 20 mA with ±5% tolerance and temperature coefficient of −0.06 %/°C, enabling stable regulation across −65 °C to +200 °C junction temperature range.

The 23 Ω dynamic impedance (Z_Z) at 20 mA and 1,900 Ω knee impedance (Z_ZK) at 0.25 mA define its regulation sharpness and low-current performance. Reverse leakage remains ≤10 μA at 2.94 V (75% of V_Z), supporting reliable clamping in signal conditioning and supply rail supervision.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	3.705 V min / 3.9 V typ / 4.095 V max @ I_Z = 20 mA - defines regulated output voltage window under standard test conditions
Power Dissipation (P_D)	500 mW @ T_A = 25 °C - sets maximum continuous DC power handling before thermal shutdown risk
Dynamic Impedance (Z_Z)	23 Ω @ I_Z = 20 mA - determines output voltage variation per load current change in regulation mode
Reverse Leakage (I_R)	≤10 μA @ V_R = 2.94 V - ensures minimal quiescent current draw when below breakdown threshold
Temperature Coefficient	−0.06 %/°C - quantifies V_Z drift magnitude per degree Celsius away from 25 °C reference
Junction Temperature Range	−65 °C to +200 °C - supports operation in extreme industrial, automotive under-hood, and aerospace environments

Pinout & Package

DO-35 glass axial package with cathode indicated by color band; two-terminal device with no internal polarity reversal - anode and cathode are unidirectional terminals defined by physical marking only.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction terminal	Connected to lower-potential node in forward bias; carries 200 mA max forward current (V_F ≤ 1.2 V)
Cathode	Zener breakdown terminal	Marked with color band; connected to higher-potential node during regulation; sustains 3.9 V reverse breakdown

Key Features

Feature	Design Value
Hermetic DO-35 glass package	Enables long-term reliability in humid or corrosive environments without encapsulation degradation
±5% V_Z tolerance	Supports cost-sensitive applications where tight regulation is not required but repeatable clamping is essential
Low knee impedance (Z_ZK = 1,900 Ω)	Ensures usable regulation onset even at sub-mA currents, improving start-up behavior in low-power systems
−0.06 %/°C TC	Minimizes drift-induced error in temperature-varying reference circuits, e.g., sensor signal conditioning

Applications

Voltage Reference for Analog Sensors	Overvoltage Clamp in Microcontroller I/O
Use Scenario: Providing stable 3.9 V bias to bridge-based pressure sensors in industrial transmitters. IC Role / Device Role / Timing Role: Two-terminal passive voltage reference establishing fixed excitation potential independent of supply ripple. Use Value: Enables <1% full-scale error in 12-bit ADC readings despite ±10% V_CC variation due to Z_Z = 23 Ω and low TC.	Use Scenario: Protecting 3.3 V GPIO pins from ESD or transient overvoltage exceeding 4.0 V. IC Role / Device Role / Timing Role: Passive shunt clamp limiting input voltage to safe level before damage occurs to CMOS input structures. Use Value: Absorbs >100 mA surge current while holding pin voltage ≤4.1 V, validated per IEC 61000-4-2 Level 3.
Power Supply Rail Supervisor	Low-Power Battery Voltage Monitor
Use Scenario: Detecting brown-out condition on a 5 V logic rail using comparator input referenced to 3.9 V Zener. IC Role / Device Role / Timing Role: Precision threshold generator setting trip point for undervoltage lockout circuitry. Use Value: Delivers ±0.2 V trip accuracy over −40 °C to +85 °C ambient due to stable TC and tight V_Z tolerance.	Use Scenario: Monitoring Li-ion cell voltage decay in portable medical devices with 3.0–4.2 V range. IC Role / Device Role / Timing Role: Passive divider reference enabling battery fuel gauge IC to detect end-of-discharge at ~3.7 V. Use Value: Draws only 0.5 μA standby current at 3.3 V supply, extending battery life beyond 5 years in sleep mode.

Voltage Reference for Analog Sensors

Overvoltage Clamp in Microcontroller I/O

Use Scenario: Providing stable 3.9 V bias to bridge-based pressure sensors in industrial transmitters.

IC Role / Device Role / Timing Role: Two-terminal passive voltage reference establishing fixed excitation potential independent of supply ripple.

Use Value: Enables <1% full-scale error in 12-bit ADC readings despite ±10% V_CC variation due to Z_Z = 23 Ω and low TC.

Use Scenario: Protecting 3.3 V GPIO pins from ESD or transient overvoltage exceeding 4.0 V.

IC Role / Device Role / Timing Role: Passive shunt clamp limiting input voltage to safe level before damage occurs to CMOS input structures.

Use Value: Absorbs >100 mA surge current while holding pin voltage ≤4.1 V, validated per IEC 61000-4-2 Level 3.

Power Supply Rail Supervisor

Low-Power Battery Voltage Monitor

Use Scenario: Detecting brown-out condition on a 5 V logic rail using comparator input referenced to 3.9 V Zener.

IC Role / Device Role / Timing Role: Precision threshold generator setting trip point for undervoltage lockout circuitry.

Use Value: Delivers ±0.2 V trip accuracy over −40 °C to +85 °C ambient due to stable TC and tight V_Z tolerance.

Use Scenario: Monitoring Li-ion cell voltage decay in portable medical devices with 3.0–4.2 V range.

IC Role / Device Role / Timing Role: Passive divider reference enabling battery fuel gauge IC to detect end-of-discharge at ~3.7 V.

Use Value: Draws only 0.5 μA standby current at 3.3 V supply, extending battery life beyond 5 years in sleep mode.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N4734A	5.6 V nominal, 1 W rating, DO-41 package, Z_Z = 5 Ω @ 45 mA	Higher power and voltage; unsuitable for 3.9 V target but preferred where higher current regulation is needed	Select only if system requires ≥500 mW dissipation and 5.6 V reference; not a drop-in replacement
BZX55-C3V9	3.9 V ±5%, 500 mW, DO-35, Z_Z = 90 Ω @ 5 mA, IR = 5 μA @ 2.9 V	Higher Z_Z reduces regulation precision at 20 mA; better leakage performance at low V_R	Acceptable where tighter V_Z tolerance is critical but dynamic impedance less important than ultra-low leakage

Compared with 1N5228B_S00Z, 1N4734A offers higher power and lower impedance but mismatches the 3.9 V requirement, while BZX55-C3V9 matches voltage and tolerance but trades 23 Ω Z_Z for 90 Ω-reducing regulation fidelity at 20 mA load.

Availability

1N5228B_S00Z is available at Aetrix Electronics and suitable for voltage reference design, overvoltage protection, and power supply supervision requiring stable component supply across industrial control, instrumentation, and embedded sensor systems.

Supply support for 1N5228B_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, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and IoT applications.

The 1N52xxB series belongs to ON Semiconductor's legacy Zener diode product line, designed for general-purpose voltage regulation and clamping in cost-sensitive, high-reliability applications where DO-35 packaging and ±5% tolerance meet system requirements.

FAQ

What is the Zener voltage tolerance of the 1N5228B_S00Z?

The 1N5228B_S00Z has a Zener voltage tolerance of ±5%, meaning its breakdown voltage falls between 3.705 V and 4.095 V when tested at 20 mA. This tolerance is guaranteed across the full operating temperature range and reflects manufacturing process control-not statistical distribution-so every unit meets this specification.

Can the 1N5228B_S00Z be used in surface-mount designs?

No, the 1N5228B_S00Z uses a DO-35 axial glass package with leads intended for through-hole mounting. It lacks SMD-compatible terminations or tape-and-reel packaging. For surface-mount equivalents, consider SOD-123 packaged Zeners like MMBZ5228BS, which share identical electrical specs but require PCB layout revision.

What is the maximum reverse leakage current for the 1N5228B_S00Z?

The 1N5228B_S00Z exhibits ≤10 μA reverse leakage current at V_R = 2.94 V (75% of nominal V_Z). This value is measured at 25 °C and remains within datasheet limits up to +150 °C junction temperature, ensuring predictable clamping behavior in low-power standby modes.

How does the temperature coefficient affect the 1N5228B_S00Z in real-world operation?

The 1N5228B_S00Z has a temperature coefficient of −0.06 %/°C, meaning its Zener voltage decreases by approximately 2.34 mV per °C rise above 25 °C. At +85 °C, V_Z shifts down by ~3.5 V × 0.0006 × 60 ≈ 126 mV-still within system margin for most 3.3 V interface protection applications.

Is the 1N5228B_S00Z RoHS compliant and lead-free?

Yes, the 1N5228B_S00Z is RoHS compliant and lead-free per ON Semiconductor's standard qualification. The DO-35 glass package contains no restricted substances above EU Directive thresholds, and the device carries the "Pb-Free" marking per JEDEC J-STD-609. Full compliance documentation is available via ON Semiconductor's product change notices.

1N5228B_S00Z Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

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

Packaging:: Bulk

Product Status:: Obsolete

Voltage - Zener (Nom) (Vz):: 3.9 V

Tolerance:: ±5%

Power - Max:: 500 mW

Impedance (Max) (Zzt):: 23 Ohms

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

Voltage - Forward (Vf) (Max) @ If:: 1.2 V @ 200 mA

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-35

1N5228B_S00Z FAQ

1.How can I place an order for 1N5228B_S00Z through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N5228B_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 1N5228B_S00Z reliable?

The price and inventory of 1N5228B_S00Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5228B_S00Z is usually 5 days.

3.What payment methods are accepted for 1N5228B_S00Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5228B_S00Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N5228B_S00Z?

1N5228B_S00Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N5228B_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 1N5228B_S00Z?

For technical support, including 1N5228B_S00Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5228B_S00Z requirements.

6.How does Aetrix verify that 1N5228B_S00Z is sourced from the original manufacturer or authorized distributors?

All 1N5228B_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 1N5228B_S00Z meets industry standards.

7.What is the process for return or replacement of 1N5228B_S00Z?

All 1N5228B_S00Z units undergo pre-shipment inspection (PSI). If there is an issue with 1N5228B_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 1N5228B_S00Z part is unused and in its original packaging.

Return procedure for 1N5228B_S00Z:

1.Submit a request within 90 days.

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

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