Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

onsemi 1N5222B_T50A

Name: 1N5222B_T50A
Brand: onsemi
SKU: 1N5222B_T50A
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: 1N5222B_T50A

Manufacturer:: onsemi

Category:: Single Zener Diodes

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

Datasheet:: 1N5222B_T50A.pdf

Description:: DIODE ZENER 2.5V 500MW DO35

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:3,568

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

1N5222B_T50A from ON Semiconductor is a 2.5 V ±5% tolerance silicon Zener diode in DO-35 glass package, rated for 500 mW power dissipation at 25°C, with 30 Ω dynamic impedance at 20 mA test current and -0.085 %/°C temperature coefficient. It provides precise low-voltage regulation in voltage reference and overvoltage protection circuits for analog sensor interfaces and microcontroller power rails.

For engineers reviewing the 1N5222B_T50A datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage accuracy (2.375–2.625 V), thermal stability, low leakage (<100 μA at 1.0 V), and DO-35 mechanical compatibility in space-constrained PCB layouts.

Technical Context

This device operates as a two-terminal voltage reference using reverse-biased Zener breakdown in a hermetically sealed glass package. Its 2.5 V nominal Zener voltage is specified at 20 mA test current with tight 5% tolerance and measured under thermal equilibrium at 30°C lead temperature per JEDEC DO-204AH standard.

The -0.085 %/°C temperature coefficient ensures minimal drift across -65°C to +200°C junction temperature range, while 30 Ω dynamic impedance supports stable regulation under varying load conditions. Forward voltage is ≤1.2 V at 200 mA, confirming standard silicon PN junction behavior.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	2.375–2.625 V @ I_Z = 20 mA - defines regulated output voltage window for precision biasing
Power Dissipation (P_D)	500 mW @ T_A = 25°C - sets maximum continuous power handling before thermal derating
Dynamic Impedance (Z_Z)	30 Ω @ I_Z = 20 mA - determines output voltage variation under load current changes
Temperature Coefficient (TC)	-0.085 %/°C - quantifies voltage drift per degree Celsius for stability-critical references
Reverse Leakage (I_R)	≤100 μA @ V_R = 1.0 V - limits standby current in low-power voltage monitor circuits
Package	DO-35 glass - industry-standard axial leaded package with cathode band marking and 0.137 g mass

Pinout & Package

DO-35 glass package: axial-leaded, hermetically sealed, cathode indicated by color band. Dimensions comply with JEDEC DO-204AH standard; total length ≥25.40 mm (T50), body diameter 1.91 mm, lead diameter 0.46 mm.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction terminal / Zener cathode reference ground	Connected to circuit ground or lower potential node in shunt regulation configuration
Cathode	Zener breakdown terminal / voltage reference output	Connected to input supply via series resistor; delivers regulated 2.5 V to load

Key Features

Feature	Design Value
±5% Zener voltage tolerance	Enables accurate 2.5 V reference without external trimming in cost-sensitive designs
-0.085 %/°C temperature coefficient	Supports stable operation across industrial temperature range (-40°C to +85°C ambient)
500 mW power rating with 4.0 mW/°C derating	Allows use in moderate-power shunt regulators with predictable thermal margin
DO-35 glass package with cathode band	Ensures visual polarity identification and compatibility with legacy through-hole assembly processes
100 μA max reverse leakage at 1.0 V	Minimizes quiescent current in battery-powered voltage detection circuits

Applications

Microcontroller Power Rail Clamp	ADC Reference Voltage Stabilizer
Use Scenario: Clamping 3.3 V MCU I/O pins against ESD transients or overvoltage events. IC Role / Device Role / Timing Role: Shunt protection device limiting voltage to safe 2.5 V threshold. Use Value: Prevents latch-up or damage using low-leakage Zener clamping without affecting normal signal swing.	Use Scenario: Providing stable 2.5 V reference for 12-bit analog-to-digital converters in data acquisition systems. IC Role / Device Role / Timing Role: Precision voltage reference source for ADC internal reference or external VREF input. Use Value: Enables <1 LSB error contribution from reference drift due to -0.085 %/°C TC and tight 5% tolerance.
Low-Power Sensor Bias Supply	Industrial Current Loop Receiver
Use Scenario: Generating stable bias voltage for analog-output temperature or pressure sensors in remote monitoring nodes. IC Role / Device Role / Timing Role: Low-quiescent-current voltage reference for sensor excitation circuitry. Use Value: Delivers 2.5 V with ≤100 μA leakage, extending battery life in wireless sensor nodes operating at 20–200 μA average current.	Use Scenario: Regulating supply voltage for 4–20 mA loop receiver ICs in PLC analog input modules. IC Role / Device Role / Timing Role: Input-stage voltage clamp and local reference generator. Use Value: Maintains 2.5 V reference stability despite common-mode voltage variations up to ±15 V on loop inputs.

Microcontroller Power Rail Clamp

ADC Reference Voltage Stabilizer

Use Scenario: Clamping 3.3 V MCU I/O pins against ESD transients or overvoltage events.

IC Role / Device Role / Timing Role: Shunt protection device limiting voltage to safe 2.5 V threshold.

Use Value: Prevents latch-up or damage using low-leakage Zener clamping without affecting normal signal swing.

Use Scenario: Providing stable 2.5 V reference for 12-bit analog-to-digital converters in data acquisition systems.

IC Role / Device Role / Timing Role: Precision voltage reference source for ADC internal reference or external VREF input.

Use Value: Enables <1 LSB error contribution from reference drift due to -0.085 %/°C TC and tight 5% tolerance.

Low-Power Sensor Bias Supply

Industrial Current Loop Receiver

Use Scenario: Generating stable bias voltage for analog-output temperature or pressure sensors in remote monitoring nodes.

IC Role / Device Role / Timing Role: Low-quiescent-current voltage reference for sensor excitation circuitry.

Use Value: Delivers 2.5 V with ≤100 μA leakage, extending battery life in wireless sensor nodes operating at 20–200 μA average current.

Use Scenario: Regulating supply voltage for 4–20 mA loop receiver ICs in PLC analog input modules.

IC Role / Device Role / Timing Role: Input-stage voltage clamp and local reference generator.

Use Value: Maintains 2.5 V reference stability despite common-mode voltage variations up to ±15 V on loop inputs.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N4728A	3.3 V nominal Zener voltage, same DO-41 package, 1.0 Ω higher Z_Z	Higher voltage output requires redesign of series resistor and load interface	Select when 3.3 V reference is required and board layout accommodates DO-41's larger footprint
BZX55C2V4	2.4 V nominal, ±5% tolerance, DO-35 package, 60 Ω Z_Z at 5 mA	Lower test current (5 mA vs. 20 mA) and higher impedance reduce regulation accuracy under load	Use where lower power dissipation (500 mW same) and tighter space constraints justify trade-off in regulation performance

Compared with 1N5222B_T50A, the 1N4728A offers higher voltage but requires PCB rework for DO-41, while BZX55C2V4 matches the DO-35 form factor but sacrifices regulation precision due to higher dynamic impedance and lower test current specification.

Availability

1N5222B_T50A is available at Aetrix Electronics and suitable for microcontroller I/O protection, ADC reference stabilization, and low-power sensor biasing requiring stable component supply across industrial, automotive, and IoT production programs.

Supply support for 1N5222B_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

ON Semiconductor is a global semiconductor manufacturer specializing in energy-efficient power management, analog, and sensor solutions for automotive, industrial, and cloud infrastructure markets.

The 1N52xxB series belongs to ON Semiconductor's legacy Zener diode product line, designed specifically for general-purpose voltage regulation and reference applications in cost-sensitive, high-reliability through-hole assemblies.

FAQ

What is the nominal Zener voltage of the 1N5222B_T50A and how is it tested?

The 1N5222B_T50A has a nominal Zener voltage of 2.5 V, with a guaranteed range of 2.375 V to 2.625 V at 20 mA test current. It is measured under thermal equilibrium conditions at 30°C ±1°C lead temperature using a 3/8-inch lead length, per ON Semiconductor's electrical characterization methodology detailed in Rev. 3 datasheet.

Does the 1N5222B_T50A have a specified forward voltage?

Yes, the 1N5222B_T50A specifies a maximum forward voltage of 1.2 V at 200 mA forward current. This value confirms its behavior as a standard silicon PN junction diode in forward conduction mode, supporting dual-use as both Zener regulator and rectifier in specific circuit topologies.

What is the temperature coefficient of the 1N5222B_T50A and why does it matter?

The 1N5222B_T50A has a temperature coefficient of -0.085 %/°C, meaning its Zener voltage decreases by approximately 2.125 mV per °C rise in junction temperature. This parameter is critical for applications requiring stable reference voltages across wide ambient ranges, such as industrial sensor signal conditioning.

Can the 1N5222B_T50A be used in surface-mount designs?

No, the 1N5222B_T50A uses a DO-35 glass axial-leaded package intended for through-hole mounting. It is not compatible with SMT reflow or wave soldering processes. For surface-mount equivalents, consider ON Semiconductor's NSZ series or other SOD-123 packaged Zeners with matching voltage ratings.

How does the 1N5222B_T50A compare to the 1N5221B in terms of Zener voltage?

The 1N5222B_T50A has a nominal Zener voltage of 2.5 V (2.375–2.625 V), whereas the 1N5221B is rated at 2.4 V (2.28–2.52 V). Both share identical package, power rating, dynamic impedance, and temperature coefficient, differing only in nominal voltage and tolerance band center point for distinct reference design requirements.

1N5222B_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):: 2.5 V

Tolerance:: ±5%

Power - Max:: 500 mW

Impedance (Max) (Zzt):: 30 Ohms

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

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

Operating Temperature:: -65°C ~ 200°C

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-35

1N5222B_T50A FAQ

1.How can I place an order for 1N5222B_T50A through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N5222B_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 1N5222B_T50A reliable?

The price and inventory of 1N5222B_T50A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5222B_T50A is usually 5 days.

3.What payment methods are accepted for 1N5222B_T50A?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5222B_T50A transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N5222B_T50A?

1N5222B_T50A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N5222B_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 1N5222B_T50A?

For technical support, including 1N5222B_T50A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5222B_T50A requirements.

6.How does Aetrix verify that 1N5222B_T50A is sourced from the original manufacturer or authorized distributors?

All 1N5222B_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 1N5222B_T50A meets industry standards.

7.What is the process for return or replacement of 1N5222B_T50A?

All 1N5222B_T50A units undergo pre-shipment inspection (PSI). If there is an issue with 1N5222B_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 1N5222B_T50A part is unused and in its original packaging.

Return procedure for 1N5222B_T50A:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-09 Counterfeit Electronic Components: How to Detect, Authenticate, and Test Suspect Parts

Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…