onsemi 1N5334BRL

Overview

1N5334BRL from onsemi is a 5 W axial-lead Zener diode with nominal zener voltage of 3.6 V, ±5% tolerance, 350 Ω maximum zener impedance at 2.5 mA test current, and 18.7 µA maximum leakage current at 0.8 V reverse bias. It operates as a precision voltage reference or shunt regulator in low-voltage power supply feedback paths, overvoltage protection circuits, and voltage-clamping applications.

For engineers reviewing the 1N5334BRL datasheet, pinout, applications, or equivalent options, this device serves as a Pb-free, surge-rated (1320 A peak @ 8.3 ms), ESD-hardened (Class 3, >16 kV HBM) discrete voltage regulation component requiring axial-lead mounting and thermal derating above 25°C.

Technical Context

This Zener diode uses silicon-oxide passivated junction technology to achieve tight voltage tolerance and stable regulation under DC and transient conditions. Its 3.6 V nominal breakdown voltage falls within the 3.3–10 V range where temperature coefficient is negative and optimized for low-drift reference use.

The device delivers 5 W steady-state power dissipation at 25°C lead temperature with 40 mW/°C linear derating, and supports non-repetitive surge currents up to 1320 A for 8.3 ms pulses - enabled by its Surmetic 40 transfer-molded plastic package and low junction-to-lead thermal resistance of 25 °C/W.

Key Specifications

Pinout & Package

Package: Axial-lead, transfer-molded plastic (Case 017AA), cathode indicated by band. Dimensions: 8.38–8.89 mm length × 3.30–3.68 mm diameter, lead diameter uncontrolled, 25.4–31.75 mm lead length.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 1N5334BRL, the 1N5334B offers identical electrical behavior in bulk packaging, while BZX84-C3V6LT1G trades surge resilience and power handling for miniaturization - making 1N5334BRL optimal for ruggedized, through-hole, high-reliability power regulation where thermal mass and pulse energy absorption matter.

Availability

1N5334BRL is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, and medical sensor interfaces requiring stable component supply with full traceability and lifecycle continuity.

Supply support for 1N5334BRL 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 (Semiconductor Components Industries, LLC) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The 1N53 Series belongs to onsemi's discrete Zener regulator product line, engineered for high-reliability voltage reference and clamping in harsh environments - emphasizing surge immunity, ESD hardness, and tight parametric control.

FAQ

What is the nominal zener voltage and tolerance of the 1N5334BRL?

The 1N5334BRL has a nominal zener voltage of 3.6 V with a guaranteed tolerance of ±5%, meaning its actual breakdown voltage falls between 3.42 V and 3.78 V when tested at I_ZT = 2.5 mA and T_A = 25°C. This tight tolerance is maintained across the full operating temperature range of −65°C to +150°C, supporting precision regulation in mission-critical systems where voltage accuracy directly impacts functional safety.

How does the 1N5334BRL handle transient overvoltage events?

The 1N5334BRL supports a peak non-repetitive surge current of 1320 A for an 8.3 ms square-wave pulse, validated per onsemi's Figure 5 data. Its Surmetic 40 axial package and silicon-oxide passivated junction enable this robustness without parameter shift. Engineers must ensure PCB traces and heatsinking accommodate the resulting 5 W dissipation and thermal rise - especially since junction temperature must remain ≤150°C under DC conditions.

Is the 1N5334BRL RoHS-compliant and lead-free?

Yes, the 1N5334BRL is a Pb-free device, indicated by the "G" suffix in its full ordering code (1N5334BRL, G). It complies with RoHS Directive 2011/65/EU and uses a transfer-molded thermosetting plastic case with corrosion-resistant, readily solderable leads. The maximum soldering temperature is rated at 260°C for 10 seconds at 1/16 inch from the case, aligning with standard lead-free reflow profiles.

What is the maximum steady-state power dissipation for the 1N5334BRL, and how does it derate with temperature?

The 1N5334BRL is rated for 5 W steady-state power dissipation at a lead temperature (T_L) of 25°C. Above 25°C, it derates linearly at 40 mW/°C - meaning at 75°C lead temperature, maximum allowable power drops to 3 W. This derating is based on junction-to-lead thermal resistance (θ_JL = 25 °C/W) and must be calculated using actual measured lead temperature, not ambient, to avoid thermal runaway.

Can the 1N5334BRL be used as a replacement for older 1N4728A-style Zeners?

The 1N5334BRL is not a direct drop-in replacement for 1N4728A due to key differences: 1N4728A is rated at 1 W and 3.3 V, while 1N5334BRL is 5 W and 3.6 V. Substituting requires verifying that the higher power rating and voltage shift do not disrupt feedback loop stability or exceed downstream component ratings. Its superior surge rating (1320 A vs. ~50 A) and ESD class (3 vs. unqualified) make it suitable only where those enhancements are needed and thermally accommodated.