Renesas HZ27BPTK-E

Overview

HZ27BPTK-E from Renesas is a silicon planar Zener diode optimized for low-noise voltage regulation in precision analog circuits, featuring a nominal zener voltage of 27.2 V to 28.6 V at 0.5 mA test current, 24.0 Ω dynamic impedance, 400 mW power dissipation, and DO-35 glass package with navy-blue cathode band. It serves as a stable reference in low-drift power supply feedback loops and sensor biasing networks.

For engineers reviewing the HZ27BPTK-E datasheet, HZ27BPTK-E pinout, HZ27BPTK-E application, or HZ27BPTK-E equivalent, key selection criteria include zener voltage tolerance (±2.5% typical), temperature coefficient (−0.04 %/°C at ~27 V), low noise performance (1/3–1/10 of standard HZ series), and DO-35 thermal derating behavior up to 175°C junction temperature.

Technical Context

The HZ27BPTK-E employs a silicon planar junction structure with controlled doping and passivation to achieve low flicker noise and stable zener breakdown characteristics. Its 27.2–28.6 V zener range targets mid-to-high-voltage reference applications where thermal drift and long-term stability are critical.

Designed for DC-regulated operation, it specifies reverse current ≤1 μA at VR = 20.2 V and dynamic resistance of 24.0 Ω measured at IZ = 0.5 mA - parameters validated under strict Ta = 25°C conditions per REJ03G0182-0300 Rev.3.00.

Key Specifications

Pinout & Package

Package: DO-35 glass axial package (JEITA code GRZZ0002ZB-A, Renesas code SC-40), orange body with navy-blue cathode band, mass 0.13 g, dimensions φD = 2.0 mm, L = 26.0 mm, E = 4.2 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX85C27 and 1N5252B, the HZ27BPTK-E delivers superior voltage stability (±2.5% vs. ±5%), lower impedance (24 Ω vs. 35 Ω), and quantified low-noise operation - making it the preferred choice for metrology-grade references despite identical DO-35 form factor.

Availability

HZ27BPTK-E is available at Aetrix Electronics and suitable for precision voltage reference, low-noise sensor biasing, and stabilized feedback node applications requiring stable component supply, consistent binning, and traceable lot history.

Supply support for HZ27BPTK-E 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

Renesas Electronics is a global semiconductor leader delivering microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT systems.

The HZ-L Series Zener diodes were developed specifically for low-noise, high-stability voltage reference applications in instrumentation, medical devices, and precision power supplies - emphasizing noise reduction, tight V_Z tolerance, and thermal predictability.

FAQ

What is the exact zener voltage range specified for HZ27BPTK-E?

The HZ27BPTK-E has a guaranteed zener voltage range of 27.2 V minimum to 28.6 V maximum when tested at I_Z = 0.5 mA and T_a = 25°C, corresponding to the "27-2L" variant within the HZ-L Series family per REJ03G0182-0300 Rev.3.00. This 1.4 V span reflects ±2.5% tolerance around the nominal 27.9 V center point. The HZ27BPTK-E is binned to this specific range during final test.

Does HZ27BPTK-E support operation above 100°C ambient temperature?

Yes, the HZ27BPTK-E is rated for storage from −55°C to +175°C and junction temperature up to 175°C. At T_a = 100°C, its power dissipation must be derated linearly from 400 mW at 25°C using the thermal resistance profile in Figure 3 of REJ03G0182-0300. Derated P_d ≈ 200 mW at 100°C ambient, enabling use in industrial motor drives and automotive under-hood modules with proper layout.

How does the noise performance of HZ27BPTK-E compare to standard Zener diodes?

The HZ27BPTK-E achieves approximately 1/3 to 1/10 the noise level of conventional HZ-series Zeners due to optimized planar junction fabrication and low-leakage design. This is explicitly documented in the "Features" section of REJ03G0182-0300 Rev.3.00 and verified via spectral noise measurements - making HZ27BPTK-E suitable for audio preamplifiers, high-resolution ADC references, and low-drift instrumentation amplifiers where 1/f noise dominates.

Is HZ27BPTK-E compatible with lead-free reflow soldering processes?

Yes, the DO-35 glass package of HZ27BPTK-E is qualified for lead-free reflow per J-STD-020. Its maximum peak reflow temperature is 260°C for ≤10 seconds, consistent with standard Pb-free profiles. The device's 175°C junction rating and glass-body construction ensure reliability through multiple thermal cycles without parameter shift or hermeticity loss.

What is the reverse leakage current specification for HZ27BPTK-E?

The HZ27BPTK-E specifies maximum reverse leakage current I_R ≤ 1 μA when reverse-biased at V_R = 20.2 V and T_a = 25°C. This low leakage ensures minimal current draw in high-impedance reference divider networks and preserves accuracy in battery-powered precision instruments where quiescent current must remain below 10 μA.