Renesas HZK6B2L90TL

Overview

HZK6B2L90TL from Renesas Electronics is a silicon epitaxial planar Zener diode designed for voltage regulation in stabilized power supplies, with a nominal zener voltage of 5.5–6.0 V, maximum power dissipation of 500 mW, dynamic resistance ≤40 Ω at 5 mA, and operating junction temperature up to 175°C. It is used in office equipment, test instrumentation, and consumer electronics for precision low-voltage reference and overvoltage protection.

For engineers reviewing the HZK6B2L90TL datasheet, HZK6B2L90TL pinout, HZK6B2L90TL application, or HZK6B2L90TL equivalent, key selection criteria include zener voltage tolerance (±0.5 V), low leakage current (≤5 µA at 0.5 V), thermal coefficient behavior near 6 V, and LLD surface-mount compatibility for high-density PCB layouts.

Technical Context

The HZK6B2L90TL operates as a two-terminal shunt regulator, maintaining stable output voltage across variable load and input conditions via controlled reverse-bias breakdown. Its epitaxial planar construction ensures consistent zener impedance and low temperature drift, with a typical zener voltage temperature coefficient of +2.0 mV/°C near 6 V.

This device is rated for DC operation only, with absolute maximum ratings defined at Ta = 25°C and derated linearly above 25°C per Fig.3. It requires no external biasing circuitry and functions without series resistors in low-current reference applications, though current-limiting is mandatory under full-power conditions.

Key Specifications

Pinout & Package

The HZK6B2L90TL uses the LLD package: a glass-passivated, cylindrical, axial-lead–style surface-mount diode with cathode band marking. Dimensions: φ1.4 ± 0.1 mm × 3.5 mm length; mass: 0.027 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX55C6V2 and MMSZ5232B, the HZK6B2L90TL delivers tighter voltage tolerance (±0.5 V vs. ±5%), lower dynamic resistance (≤40 Ω vs. ≥60 Ω), and optimized thermal performance in the ultra-compact LLD package - making it preferable for space-constrained, precision-regulated industrial and test equipment.

Availability

HZK6B2L90TL is available at Aetrix Electronics and suitable for industrial power monitoring, office equipment PSUs, test & measurement calibration, and consumer audio reference designs requiring stable component supply, long-term manufacturability, and RoHS-compliant sourcing.

Supply support for HZK6B2L90TL 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 Corporation is a Japanese semiconductor manufacturer specializing in microcontrollers, analog and power devices, and system-on-chip solutions for industrial, automotive, and consumer markets.

The HZK Series was developed by Renesas Electronics as a family of general-purpose silicon Zener diodes targeting stabilized DC power supply applications in standard-grade electronics, emphasizing reliability, tight voltage tolerance, and surface-mount compatibility.

FAQ

What is the exact zener voltage range specified for HZK6B2L90TL?

The HZK6B2L90TL has a guaranteed zener voltage range of 5.5 V to 6.0 V when tested at I_Z = 5 mA and T_a = 25°C, per the "HZK Series" datasheet Rev.3.00. This grade 'B' tolerance corresponds to ±0.5 V about the nominal 5.75 V center point, and applies strictly under DC test conditions.

Is HZK6B2L90TL compatible with reflow soldering processes?

Yes, the HZK6B2L90TL in its LLD package is qualified for standard Pb-free reflow soldering profiles, including JEDEC J-STD-020 moisture sensitivity level (MSL) 1. The glass-passivated construction and 175°C maximum junction temperature support peak reflow temperatures up to 260°C for ≤10 seconds, provided thermal mass and board layout allow adequate heat dissipation.

Does HZK6B2L90TL have a specified temperature coefficient?

Yes - the HZK6B2L90TL exhibits a positive zener voltage temperature coefficient of approximately +2.0 mV/°C near its 6 V operating point, as shown in Fig.2 of the HZK Series datasheet. This value is typical and not individually tested per unit, but falls within the expected range for 5–6 V Zener devices using epitaxial planar technology.

Can HZK6B2L90TL be used in place of a 6.2 V Zener diode like BZX55C6V2?

No - the HZK6B2L90TL is rated 5.5–6.0 V, while BZX55C6V2 is 6.2 V ±5%. Substituting them without circuit recalibration risks undershoot in regulation targets or excessive current in feedback loops. For 6.2 V functionality, Renesas does not list an HZK6.2 variant; alternative selection must consider voltage alignment, package, and dynamic impedance trade-offs.

What is the meaning of '2L90TL' in the full part number HZK6B2L90TL?

The suffix '2L90TL' identifies the specific manufacturing variant: '2' denotes tape-and-reel packaging (2000 pcs/reel), 'L90' indicates lead-free (Pb-free) plating per JEDEC standards, and 'TL' signifies compliance with RoHS Directive 2011/65/EU. This matches Renesas' documented LLD package coding convention and environmental compliance labeling.