Renesas HZM6.8WA-JTL-E

Overview

HZM6.8WA-JTL-E from Renesas Electronics is a silicon epitaxial planar Zener diode designed for precision voltage stabilization in low-power analog and reference circuits, featuring a nominal zener voltage of 6.8 V (B3 grade: 6.86–7.14 V), dynamic resistance of 30 Ω at 5 mA, power dissipation of 200 mW, and MPAK surface-mount package. It operates within –55°C to +150°C storage range and supports stable regulation in voltage reference, overvoltage protection, and biasing applications.

For engineers reviewing the HZM6.8WA-JTL-E datasheet, HZM6.8WA-JTL-E pinout, HZM6.8WA-JTL-E application, or HZM6.8WA-JTL-E equivalent, key selection considerations include its 6.8 V zener tolerance (±2.2% for B3 grade), low 30 Ω dynamic impedance, 200 mW power rating, MPAK footprint compatibility, and temperature coefficient of +0.035 mV/°C near 6.8 V - critical for precision reference design and thermal stability validation.

Technical Context

The HZM6.8WA-JTL-E implements a planar epitaxial junction structure optimized for tight zener voltage control and low dynamic resistance. Its B3 grade guarantees V_Z = 6.86–7.14 V at I_Z = 5 mA, with rd ≤ 30 Ω under same conditions, enabling high-accuracy regulation in feedback loops and reference dividers.

Thermal performance is defined by a maximum junction temperature of 150°C and a zener voltage temperature coefficient of +0.035 mV/°C (≈ +0.0005%/°C), confirming positive drift behavior typical of mid-voltage Zeners. The device is rated for 2 μA reverse current at VR = 5 V, supporting low-leakage bias networks.

Key Specifications

Pinout & Package

MPAK package (JEITA code PLSP0003ZC-A) is a 3-terminal surface-mount plastic package with gull-wing leads, measuring 2.7–3.1 mm × 1.35–1.65 mm × 0.95 mm height. Terminal areas conform to SC-59A outline with 0.35–0.5 mm lead width and 2.2–3.0 mm e pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C6V8LT1G and MMSZ4687T1G, the HZM6.8WA-JTL-E offers tighter B3-grade voltage tolerance (±2.2% vs. ±5%), lower dynamic resistance (30 Ω vs. ≥35 Ω), and a smaller MPAK footprint - making it optimal for precision reference and high-density industrial PCBs where thermal stability and layout efficiency are prioritized.

Availability

HZM6.8WA-JTL-E is available at Aetrix Electronics and suitable for industrial sensor reference, USB port overvoltage clamp, and programmable logic bias network applications requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.

Supply support for HZM6.8WA-JTL-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 timing solutions for industrial, automotive, and infrastructure markets, with emphasis on reliability and long-lifecycle support.

The HZM-N Series is part of Renesas' discrete Zener portfolio engineered specifically for high-accuracy voltage stabilization in space-constrained, thermally demanding applications - targeting industrial automation, instrumentation, and embedded power management.

FAQ

What is the exact zener voltage range for HZM6.8WA-JTL-E at 5 mA test current?

The HZM6.8WA-JTL-E is specified as a B3-grade device with a zener voltage range of 6.86 V to 7.14 V at I_Z = 5 mA, corresponding to ±2.2% tolerance around the nominal 6.8 V rating. This range is confirmed in the R07DS0358EJ0600 Rev.6.00 datasheet, page 2, under Electrical Characteristics for HZM6.8N. The HZM6.8WA-JTL-E is a tape-and-reel variant of the HZM6.8NB3 series, retaining identical electrical specifications.

Does HZM6.8WA-JTL-E have a functional pin 1, and what happens if it is connected?

No, pin 1 of the HZM6.8WA-JTL-E is designated NC (No Connect) and is electrically isolated from the internal die. Connecting pin 1 to any net may introduce parasitic capacitance, mechanical stress on the bond wire, or thermal imbalance - all of which can degrade long-term reliability and zener voltage stability. The datasheet explicitly states "1. NC" in the Pin Arrangement diagram (page 1), and layout guidelines require leaving this terminal floating.

What is the maximum reverse current guaranteed for HZM6.8WA-JTL-E at 5 V applied voltage?

The HZM6.8WA-JTL-E guarantees a maximum reverse current (I_R) of 2 μA when 5 V is applied across its cathode-to-anode terminals (V_R = 5 V), per the Electrical Characteristics table on page 2 of the R07DS0358EJ0600 datasheet. This low leakage supports ultra-low-power bias networks and extends battery life in always-on monitoring circuits using the HZM6.8WA-JTL-E as a reference element.

Can HZM6.8WA-JTL-E be used in place of a 6.8 V Zener in an existing SOT-23 design?

No - the HZM6.8WA-JTL-E uses the MPAK (PLSP0003ZC-A) package, which has different dimensions, pin pitch (0.65 mm), and pinout (NC-Anode-Cathode) than standard SOT-23 (Anode-Cathode-NC or Cathode-Anode-NC). Direct substitution would require PCB redesign. For drop-in replacement, consider SOT-23-compatible alternatives like BZX84-C6V8LT1G, but note its ±5% tolerance differs from the HZM6.8WA-JTL-E's tighter B3-grade spec.

What is the temperature coefficient of HZM6.8WA-JTL-E, and how does it affect reference stability?

The HZM6.8WA-JTL-E exhibits a zener voltage temperature coefficient (γ_Z) of +0.035 mV/°C, as shown in Figure 2 (page 5) of the datasheet. Over a –25°C to +85°C ambient range, this results in a total drift of approximately ±0.385 mV - less than 0.006% of 6.8 V - making the HZM6.8WA-JTL-E suitable for applications requiring sub-0.01% reference stability without active compensation.