onsemi 1N4711RL

Overview

1N4711RL from onsemi is a 27 V ±5% Zener voltage regulator diode in a DO-35 (DO-204AH) hermetically sealed glass package, rated for 500 mW steady-state power dissipation at 75°C lead temperature, with 20.4 mA maximum zener current and 0.01 µA reverse leakage at 21.6 V. It serves as a precision voltage reference in low-power analog circuits, power supply feedback loops, and overvoltage protection clamps.

For engineers reviewing the 1N4711RL datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage tolerance, low-leakage performance at elevated temperatures, thermal derating behavior, and compatibility with axial-lead hand-soldering or tape-and-reel automated assembly.

Technical Context

The 1N4711RL uses an oxide-passivated silicon junction to achieve sharp breakdown characteristics and stable regulation under low-current conditions (IZT = 10 mA). Its double-slug, metallurgically bonded construction ensures mechanical robustness and hermetic sealing against moisture and contaminants.

It operates across –65°C to +200°C junction temperature range, with thermal resistance from junction-to-lead (θJL) ~30–40°C/W depending on mounting method. Voltage drift is governed by a positive temperature coefficient above ~5 V, with typical θVZ ≈ +5.5 mV/°C near 27 V, requiring thermal management in precision references.

Key Specifications

Pinout & Package

Package: DO-35 (JEDEC DO-204AH), axial-lead, hermetically sealed glass case with cathode polarity band. Leads are corrosion-resistant and readily solderable; max soldering temperature is 230°C at 1/16″ from case for 10 seconds.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 1N4711RL, the 1N4711A lacks tape-and-reel packaging for automated assembly, while BZX55C27 trades tighter leakage control for broader distributor availability-making 1N4711RL optimal for production-grade, thermally stable, low-leakage shunt references.

Availability

1N4711RL is available at Aetrix Electronics and suitable for industrial power supply feedback, overvoltage protection clamps, and low-power analog reference designs requiring stable component supply, consistent parametric performance, and JEDEC-compliant DO-35 packaging.

Supply support for 1N4711RL 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 focused on energy-efficient innovation for automotive, industrial, cloud, and IoT applications.

The 1N4711RL belongs to the legacy 1N4678–1N47xx series of low-leakage, hermetically sealed Zener regulators designed specifically for precision voltage referencing in harsh-environment and long-lifecycle systems.

FAQ

What is the nominal Zener voltage of the 1N4711RL and its tolerance?

The 1N4711RL has a nominal Zener voltage of 27 V with a standard tolerance of ±5%, meaning its actual breakdown voltage falls between 25.65 V and 28.35 V when tested at 10 mA Zener test current (I_ZT) and 30°C lead temperature. This tolerance is guaranteed per device and applies across the full operating temperature range.

Can the 1N4711RL be used in surface-mount applications?

No, the 1N4711RL is not a surface-mount device-it uses an axial-lead DO-35 (DO-204AH) glass package intended for through-hole mounting or manual placement. While it ships in tape-and-reel (5000 units) for automated axial insertion, it cannot be placed using standard SMT pick-and-place equipment or reflowed.

What is the maximum reverse leakage current for the 1N4711RL and at what voltage is it specified?

The 1N4711RL has a maximum reverse leakage current (I_R) of 0.01 µA, measured at a reverse voltage (V_R) of 21.6 V (80% of nominal 27 V) and ambient temperature. This ultra-low leakage supports high-impedance reference networks and minimizes error in precision divider-based feedback circuits.

How does thermal derating affect the 1N4711RL's power dissipation capability?

The 1N4711RL is rated for 500 mW at lead temperature (T_L) ≤ 75°C; above that, it derates linearly at 4.0 mW/°C. For example, at T_L = 100°C, maximum allowable power drops to 400 mW. Effective derating requires controlling lead temperature via PCB copper area, standoff height, or heatsinking-not just ambient temperature.

Is the 1N4711RL suitable for use as a voltage reference in precision ADC circuits?

Yes-the 1N4711RL can serve as a cost-effective voltage reference in moderate-precision ADC applications (e.g., 10–12 bit) where its ±5% initial tolerance, low 0.01 µA leakage, and stable oxide-passivated junction provide adequate accuracy without active regulation. For higher precision, pairing it with a trimming potentiometer or using it in a ratiometric configuration improves effective accuracy.