onsemi 1N5923BRLG

Overview

1N5923BRLG from onsemi is a 3 W, 8.2 V ±5% Zener diode in DO-41 axial package, designed for precision voltage regulation and overvoltage protection in DC power rails. It delivers 182 mA maximum DC zener current, exhibits 45.7 Ω zener impedance at 3.5 mA test current, and supports surge rating of 98 W at 1 ms - used in industrial power supply feedback loops and analog reference stabilization.

For engineers reviewing the 1N5923BRLG datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage tolerance (±5%), thermal derating above 75°C, cathode-band polarity marking, and Pb-free DO-41 mechanical compatibility with legacy through-hole layouts.

Technical Context

This device operates as a silicon-oxide passivated junction Zener regulator, optimized for stable reverse-biased breakdown at nominal 8.2 V with tight 7.79–8.61 V min/max range. Its 45.7 Ω dynamic impedance at IZT = 3.5 mA ensures low output variation under load transients, while ESD robustness (>16 kV HBM) enables use in unshielded industrial environments.

The 1N5923BRLG is rated for continuous 3 W dissipation at TL = 75°C with 24 mW/°C derating, and supports steady-state operation up to +200°C junction temperature. Its axial DO-41 package features corrosion-resistant leads, solderable at 260°C for 10 seconds at 1/16″ from case, and conforms to JEDEC Case 59 mechanical standards.

Key Specifications

Pinout & Package

Package: DO-41 axial lead, plastic molded case (JEDEC Case 59), cathode indicated by black band. Dimensions: 4.10–5.20 mm length × 2.00–2.70 mm diameter; lead diameter 0.71–0.86 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 1N5923BRLG, 1N5923BRL offers identical regulation but lacks Pb-free certification, while BZX55-C8V2 trades power and impedance performance for smaller size - making 1N5923BRLG optimal for high-reliability 3 W applications where RoHS and low-impedance stability are mandatory.

Availability

1N5923BRLG is available at Aetrix Electronics and suitable for industrial power supplies, automotive sensor interfaces, overvoltage protection circuits, and programmable threshold detectors requiring stable component supply and full RoHS compliance.

Supply support for 1N5923BRLG 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

onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.

The 1N59xxB series was engineered to deliver high-power Zener regulation in legacy-compatible DO-41 packages, targeting cost-sensitive yet thermally demanding applications where reliability and regulatory compliance are non-negotiable.

FAQ

What is the exact Zener voltage tolerance for 1N5923BRLG?

The 1N5923BRLG has a guaranteed ±5% tolerance on its nominal 8.2 V Zener voltage, resulting in a validated range of 7.79 V to 8.61 V at I_ZT = 3.5 mA and T_L = 30°C. This tolerance is tested and binned per onsemi's production screening, and applies across the full operating temperature range without additional derating.

Can 1N5923BRLG replace a 1 W Zener diode in an existing design?

Yes, the 1N5923BRLG can directly replace many 1 W Zeners due to its identical DO-41 package outline and pin-compatible axial leads. However, its 3 W rating requires verification of PCB copper area and ambient temperature to avoid exceeding 75°C lead temperature - unlike 1 W parts, it sustains higher continuous power only with adequate thermal management.

Is 1N5923BRLG RoHS-compliant and halogen-free?

Yes, the 'G' suffix in 1N5923BRLG explicitly denotes a Pb-free, RoHS-compliant construction per EU Directive 2011/65/EU and China RoHS II. onsemi confirms full halogen-free status (Br < 900 ppm, Cl < 900 ppm, total halogens < 1500 ppm) in accordance with IEC 61249-2-21.

What is the maximum allowable surge current for 1N5923BRLG?

The 1N5923BRLG does not specify peak surge current directly, but its 98 W surge power rating at 1 ms pulse width implies a peak current of approximately 3.45 A (calculated as √(98 W / 8.2 V)) under worst-case 8.2 V clamping. This value assumes ideal pulse shape and must be validated against actual waveform duty cycle and thermal time constants.

How does temperature affect the Zener voltage of 1N5923BRLG?

The 1N5923BRLG exhibits a positive temperature coefficient near zero crossing - data sheet Figure 5 shows ≈+2.5 mV/°C typical for 8.2 V units. Thus, V_Z increases ~0.25 V over a 100°C rise from 25°C, requiring compensation in precision references. Junction-to-lead thermal resistance (θ_JL) is 25°C/W for 3/8″ lead length, critical for accurate TJ estimation.