onsemi 1N5924BRLG

Overview

1N5924BRLG from onsemi is a 3 W, 9.1 V ±5% Zener diode in DO-41 axial package, designed for precision voltage regulation and overvoltage protection in DC power rails. It delivers 7 A maximum DC zener current, 41.2 Ω dynamic impedance at 4 mA test current, and supports surge power up to 98 W for 1 ms. Used in industrial power supplies and analog reference circuits where stable clamping under transient conditions is required.

For engineers reviewing the 1N5924BRLG datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage tolerance (±5%), thermal derating behavior above 75°C, lead-to-ambient thermal resistance, and compliance with Class 3 ESD (>16 kV HBM).

Technical Context

This device employs silicon-oxide passivated junction technology to achieve tight voltage tolerance and low leakage across temperature. Its DO-41 package enables axial mounting with cathode polarity band identification and solderability at 260°C for 10 seconds at 1/16″ from case.

The 1N5924BRLG operates within −65°C to +200°C junction temperature range and exhibits a negative temperature coefficient near 9.1 V (≈−2 mV/°C), confirmed by Figure 5 of the datasheet. Steady-state dissipation is rated at 3 W at TL = 75°C with 24 mW/°C derating above that point.

Key Specifications

Pinout & Package

DO-41 axial-leaded plastic package (Case 59, Style 1), void-free thermosetting material with corrosion-resistant finish and readily solderable leads. Cathode identified by black polarity band.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 1N5924BRL and BZX55-C9V1, the 1N5924BRLG offers superior power handling and RoHS compliance without sacrificing voltage accuracy or thermal stability - making it optimal for mid-power industrial regulation where reliability and compliance coexist.

Availability

1N5924BRLG is available at Aetrix Electronics and suitable for industrial power supplies, overvoltage protection circuits, analog reference generation, and temperature-stable bias networks requiring stable component supply and long-term lifecycle support.

Supply support for 1N5924BRLG 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, analog, sensing, and connectivity solutions for automotive, industrial, cloud, medical, and IoT applications.

The 1N5924BRLG belongs to the 1N5913B Series of 3 W Zener regulators, engineered for high-reliability voltage reference and clamping in harsh-environment systems where precision, surge resilience, and long-term stability are mandatory.

FAQ

What is the Zener voltage tolerance of the 1N5924BRLG?

The 1N5924BRLG has a nominal Zener voltage of 9.1 V with a tolerance of ±5%, meaning its actual breakdown voltage falls between 8.65 V and 9.56 V when measured at I_ZT = 4 mA and T_L = 30°C. This tolerance is guaranteed per the datasheet's electrical characteristics table and applies to all units shipped with the "B" suffix.

Can the 1N5924BRLG replace a 1 W Zener diode in an existing design?

Yes - the 1N5924BRLG uses the same DO-41 package footprint as standard 1 W Zeners, allowing direct mechanical replacement. However, its 3 W power rating means thermal design must be verified: ensure lead temperature stays ≤75°C under worst-case dissipation, and confirm PCB copper area and airflow support the higher steady-state power.

What is the maximum allowable reverse leakage current for the 1N5924BRLG?

The 1N5924BRLG specifies a maximum reverse leakage current (I_R) of 0.5 μA at V_R = 7 V and T_A = 25°C. This value is critical for low-power applications such as battery-backed sensors, where even nanoamp-level leakage could impact operational lifetime.

Does the 1N5924BRLG support lead-free soldering processes?

Yes - the "G" suffix in 1N5924BRLG explicitly denotes a Pb-free package compliant with JEDEC standards. It supports reflow profiles up to 260°C for 10 seconds at 1/16″ from the case, meeting IPC/JEDEC J-STD-020 requirements for lead-free assembly.

How does temperature affect the Zener voltage of the 1N5924BRLG?

The 1N5924BRLG exhibits a negative temperature coefficient near 9.1 V, approximately −2 mV/°C, as shown in Figure 5 of the datasheet. This means its Zener voltage decreases slightly with rising junction temperature - a key factor when designing precision references across wide temperature ranges.