Renesas HZ7C2JTA-E

Overview

HZ7C2JTA-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 7.5 V (min 7.3 V, max 7.7 V), dynamic resistance of 60 Ω at 3.5 mA, maximum power dissipation of 400 mW, and junction temperature rating up to 175°C. It is used in stabilized power supplies, reference voltage sources, and noise-sensitive instrumentation.

For engineers reviewing the HZ7C2JTA-E datasheet, HZ7C2JTA-E pinout, HZ7C2JTA-E application, or HZ7C2JTA-E equivalent, key selection criteria include its low-noise performance (1/3–1/10 that of standard HZ series), tight zener voltage tolerance, DO-35 package compatibility, and thermal stability across −55°C to +175°C storage range.

Technical Context

This device operates as a two-terminal voltage reference using avalanche breakdown in a silicon planar structure. Its low dynamic impedance (60 Ω) and low leakage current ensure stable regulation under varying load conditions, while the 7.5 V nominal zener voltage places it in the optimal range for low-temperature-coefficient operation per Figure 2 of the datasheet.

The HZ7C2JTA-E is rated for DC testing only and exhibits a zener voltage temperature coefficient near zero (±0.02 %/°C typical at this voltage level), making it suitable for applications requiring minimal drift over ambient temperature changes. Its DO-35 glass package supports through-hole mounting with cathode band identification.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with 1N4733A and BZX55-C7V5, the HZ7C2JTA-E delivers superior noise performance and tighter voltage control in the same DO-35 footprint, making it preferred for high-fidelity analog and precision measurement designs despite its lower power rating.

Availability

HZ7C2JTA-E is available at Aetrix Electronics and suitable for stabilized power supplies, precision voltage references, and low-noise analog signal chains requiring stable component supply, long-term obsolescence management, and traceable sourcing.

Supply support for HZ7C2JTA-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, and power solutions, with deep expertise in automotive, industrial, and infrastructure markets.

The HZ-L Series was designed specifically for low-noise, high-stability voltage reference applications in test equipment, medical instrumentation, and industrial sensing systems where signal integrity is critical.

FAQ

What is the exact zener voltage range for HZ7C2JTA-E?

The HZ7C2JTA-E has a guaranteed zener voltage range of 7.3 V minimum to 7.7 V maximum when tested at I_Z = 0.5 mA, per Renesas datasheet REJ03G0182-0300 Rev.3.00. This 0.4 V total spread reflects tight process control for precision reference use, and the nominal value is 7.5 V.

Is HZ7C2JTA-E suitable for surface-mount assembly?

No, the HZ7C2JTA-E uses a DO-35 axial-leaded glass package intended for through-hole mounting only. It is not compatible with reflow or wave soldering processes used for SMT. For surface-mount alternatives, consider Renesas' HZL series SOD-123 variants - but those are distinct part numbers, not drop-in replacements for HZ7C2JTA-E.

Does HZ7C2JTA-E have a specified zener voltage temperature coefficient?

Yes - while not listed as a discrete parameter for HZ7C2JTA-E specifically, Figure 2 of the HZ-L Series datasheet shows that 7.5 V-class devices exhibit a zener voltage temperature coefficient (γ_Z) near ±0.02 %/°C, corresponding to approximately ±1.5 mV/°C. This near-zero drift is confirmed by the curve's crossing point at ~7.5 V.

Can HZ7C2JTA-E replace standard 1N4733A in existing designs?

No - although both regulate near 7.5 V, the HZ7C2JTA-E is rated for 400 mW (not 1 W), has tighter voltage tolerance (±0.2 V vs. ±5%), and is optimized for low noise. Substituting it for 1N4733A requires verifying thermal margin and confirming that reduced power rating meets application requirements.

What does the "JTA-E" suffix indicate in HZ7C2JTA-E?

The "JTA-E" suffix denotes Renesas' internal packaging and testing variant: "J" = standard quality grade, "T" = tape-and-reel packaging option (though DO-35 is typically bulk or ammo pack), "A" = standard test flow, and "E" = RoHS-compliant finish. Full interpretation is defined in Renesas' ordering guide GRZZ0002ZB-A.