onsemi 1N5223B_T50A

Overview

1N5223B_T50A from ON Semiconductor is a 2.7 V ±5% 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 -0.080 %/°C temperature coefficient. It provides precision voltage reference and overvoltage clamping in low-power analog sensor biasing circuits.

For engineers reviewing the 1N5223B_T50A datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance, thermal coefficient, junction temperature range (-65°C to +200°C), and DO-35 mechanical compatibility with through-hole PCB layouts.

Technical Context

This device operates as a two-terminal silicon Zener diode optimized for stable voltage regulation in low-current (<20 mA) applications. Its 2.7 V nominal breakdown voltage is specified at I_Z = 20 mA with 5% tolerance and measured under thermal equilibrium at lead temperature of 30°C ±1°C.

The DO-35 hermetically sealed glass package ensures long-term stability and low leakage (I_R ≤ 0.25 μA at V_R = 1.0 V), while the -0.080 %/°C temperature coefficient enables predictable drift behavior across industrial temperature ranges.

Key Specifications

Pinout & Package

DO-35 glass axial-leaded package with cathode indicated by color band; leads are unmarked anode/cathode terminals suitable for through-hole mounting. Package conforms to JEDEC DO-204AH standard, 4.56 mm body length, 1.91 mm diameter, 0.137 g mass.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 1N5223B_T50A, 1N4728A offers higher power handling but requires PCB redesign for DO-41; BZX55C2V7 matches voltage and package but may require sourcing from alternate qualified lots for mission-critical use.

Availability

1N5223B_T50A is available at Aetrix Electronics and suitable for industrial sensor biasing, low-power voltage reference, and overvoltage protection applications requiring stable component supply and long-lifecycle support.

Supply support for 1N5223B_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 supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

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

FAQ

What is the Zener voltage tolerance for 1N5223B_T50A?

The 1N5223B_T50A has a Zener voltage tolerance of ±5%, meaning its breakdown voltage is guaranteed between 2.565 V and 2.835 V when tested at I_Z = 20 mA and T_L = 30°C ±1°C. This tolerance is specified in the ON Semiconductor 1N5221B–1N5263B datasheet Rev. 3, page 2. The 1N5223B_T50A achieves this via laser-trimmed wafer-level process control.

Does 1N5223B_T50A support reflow soldering?

Yes, the 1N5223B_T50A can withstand reflow soldering profiles with peak temperatures up to 230°C for 10 seconds at 1/16 inch from case, per its Absolute Maximum Ratings. Its DO-35 glass package is rated for thermal shock resistance, and the device must be mounted with proper lead length (≥3/8") to avoid junction overheating. Always verify thermal profile against ON Semiconductor's application note AN-1115 for 1N52xxB devices.

What is the maximum reverse leakage current for 1N5223B_T50A?

The maximum reverse leakage current (I_R) for 1N5223B_T50A is 0.25 μA when reverse biased at V_R = 1.0 V, as specified in the Electrical Characteristics table. This low leakage ensures minimal loading in high-impedance reference networks. The 1N5223B_T50A maintains this performance across its full storage temperature range (-65°C to +200°C).

Can 1N5223B_T50A be used in place of 1N5223B without modification?

Yes, 1N5223B_T50A is a packaging variant of 1N5223B with identical electrical specifications and DO-35 package dimensions. The "_T50A" suffix denotes tape-and-reel packaging per ON Semiconductor's ordering nomenclature; it does not indicate parameter or reliability differences. The 1N5223B_T50A shares the same Zener voltage, impedance, temperature coefficient, and thermal ratings as the bulk 1N5223B part.

What is the thermal derating behavior of 1N5223B_T50A above 50°C?

The 1N5223B_T50A derates linearly at 4.0 mW/°C above 50°C ambient temperature, reducing its maximum allowable power dissipation from 500 mW at 25°C to zero at approximately 175°C. This derating curve is defined in the Absolute Maximum Ratings table and applies to both continuous DC and pulsed operation. Designers must apply this slope when calculating worst-case junction temperature in enclosed enclosures.