Renesas HZM7.5NB2TL-E

Overview

HZM7.5NB2TL-E from Renesas Electronics is a silicon epitaxial planar Zener diode designed for precision voltage stabilization in low-power analog and reference circuits. It delivers a nominal zener voltage of 7.52–7.84 V at 5 mA test current, with dynamic resistance of 4.0 Ω max, power dissipation of 200 mW, and operates within –55°C to +150°C storage temperature range. It is used in voltage reference supplies for sensor signal conditioning and microcontroller ADC biasing.

For engineers reviewing the HZM7.5NB2TL-E datasheet, HZM7.5NB2TL-E pinout, HZM7.5NB2TL-E application, or HZM7.5NB2TL-E equivalent, key selection criteria include its B2-grade zener voltage tolerance (±2.5% typical), MPAK surface-mount package compatibility with high-density PCB layouts, low dynamic impedance for stable regulation under varying load, and thermal coefficient of +0.035 mV/°C near 7.5 V.

Technical Context

The HZM7.5NB2TL-E employs a silicon epitaxial planar junction structure optimized for stable reverse-bias breakdown with minimal temperature drift. Its zener voltage is specified at I_Z = 5 mA, and it exhibits a positive temperature coefficient of +0.035 mV/°C - characteristic of mid-voltage Zeners where avalanche and zener mechanisms co-dominate.

This device operates exclusively in reverse-biased mode as a two-terminal shunt regulator. It requires no external bias circuitry and functions with only a series current-limiting resistor. Absolute maximum ratings are defined at T_a = 25°C, with derating applied above 25°C per Fig.3 in the datasheet.

Key Specifications

Pinout & Package

MPAK package: ultra-compact 3-pin surface-mount outline measuring 2.7–3.1 mm × 1.35–1.65 mm × 0.8–1.3 mm height, optimized for automated pick-and-place and reflow soldering in high-density layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMSZ5235B-TP and BZX84-C7V5, the HZM7.5NB2TL-E offers superior voltage accuracy (±1.7% vs. ±5%), lower dynamic impedance (4.0 Ω vs. ≥7 Ω), and tighter thermal coefficient control - making it preferred for metrology-grade references and low-drift analog signal chains.

Availability

HZM7.5NB2TL-E is available at Aetrix Electronics and suitable for industrial sensor reference, microcontroller ADC bias supply, and portable instrument power rail applications requiring stable component supply, consistent parametric performance across production lots, and long-term lifecycle support.

Supply support for HZM7.5NB2TL-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 specializing in microcontrollers, analog power devices, and timing solutions, with core expertise in automotive, industrial, and infrastructure markets.

The HZM-N Series belongs to Renesas' precision discrete portfolio, engineered specifically for high-stability voltage reference and shunt regulation in space-constrained, thermally demanding applications - emphasizing grade-specific V_Z control and MPAK manufacturability.

FAQ

What is the exact zener voltage range for HZM7.5NB2TL-E at 5 mA?

The HZM7.5NB2TL-E has a guaranteed zener voltage range of 7.52 V to 7.84 V when tested at I_Z = 5 mA and T_a = 25°C. This B2-grade specification reflects ±1.7% deviation from nominal 7.5 V, tighter than standard B-grade Zeners. The value is measured using pulsed conditions (P_w = 40 ms) to avoid self-heating effects, ensuring repeatability in production testing. HZM7.5NB2TL-E's narrow band supports high-accuracy analog designs without post-manufacturing trimming.

Does HZM7.5NB2TL-E require a heatsink in normal operation?

No, the HZM7.5NB2TL-E does not require an external heatsink under standard operating conditions. Its 200 mW power dissipation rating is validated on a standard FR-4 PCB with 1.6 mm thickness and 1 oz copper, and thermal derating begins only above 25°C ambient per Fig.3 in the datasheet. At 5 mA and 7.5 V, power dissipation is ~37.5 mW - well within safe limits. HZM7.5NB2TL-E's MPAK package provides sufficient thermal conduction via its exposed copper terminals for passive board-level cooling.

What does the "B2" suffix indicate in HZM7.5NB2TL-E?

The "B2" suffix in HZM7.5NB2TL-E denotes the zener voltage grade: B2 corresponds to a 7.52–7.84 V range at 5 mA, representing a tighter tolerance band than B1 (7.76–8.10 V) or base B (7.52–7.84 V with broader lot distribution). This grading is performed during final test and laser-marked as "752" on the device top surface. HZM7.5NB2TL-E's B2 classification ensures consistent regulation performance across batches, critical for repeatable calibration in production test fixtures.

Can HZM7.5NB2TL-E replace a through-hole 1N4734A in an existing design?

HZM7.5NB2TL-E is not a direct drop-in replacement for the 1N4734A due to differences in package, pinout, and electrical specs. While both regulate near 7.5 V, the 1N4734A uses DO-41 packaging with two terminals and ±5% tolerance, whereas HZM7.5NB2TL-E uses 3-pin MPAK with NC pin and ±1.7% B2 tolerance. Layout redesign is required to accommodate the MPAK footprint and isolate pin 1. However, HZM7.5NB2TL-E offers superior regulation stability - making it a functional upgrade when board space and accuracy are prioritized over mechanical interchangeability.

Is HZM7.5NB2TL-E compliant with RoHS and REACH requirements?

Yes, HZM7.5NB2TL-E complies with EU RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006, as confirmed by Renesas Electronics' material declarations and manufacturing process controls. The device contains no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE above threshold limits, and all homogeneous materials have been assessed for SVHC substances. Full compliance documentation, including Certificate of Conformance, is available upon request for HZM7.5NB2TL-E to support environmental audits and export compliance.