Renesas HZ30-2LTD-E

Overview

HZ30-2LTD-E from Renesas Electronics is a silicon planar Zener diode optimized for low-noise voltage regulation in precision analog and power-supply reference circuits, with a nominal zener voltage of 29.2–30.6 V at 0.5 mA test current, 27 Ω dynamic impedance, 400 mW power dissipation, and DO-35 glass package - used in stabilized DC supplies and sensor biasing where noise sensitivity is critical.

For engineers reviewing the HZ30-2LTD-E datasheet, HZ30-2LTD-E pinout, HZ30-2LTD-E application, or HZ30-2LTD-E equivalent, this part delivers verified low-noise performance (≈1/3–1/10 lower than standard HZ series), tight zener voltage tolerance, and stable temperature coefficient across its operating range - key selection criteria for reference design validation and EMI-sensitive signal conditioning.

Technical Context

This device operates as a two-terminal shunt voltage regulator, relying on controlled reverse-biased avalanche breakdown to maintain a stable reference voltage under varying load and temperature conditions. Its low dynamic resistance (27 Ω) and low leakage current (<1 μA at VR = 20.2 V) support high regulation accuracy in low-current applications.

The HZ30-2LTD-E exhibits a zener voltage temperature coefficient of approximately +0.06 %/°C (or +18 mV/°C) near 30 V, confirmed by Figure 2 in REJ03G0182-0300 Rev.3.00, and is rated for junction temperatures up to 175°C - enabling reliable operation in industrial ambient environments with minimal thermal derating.

Key Specifications

Pinout & Package

Package: DO-35 glass axial lead package (JEITA code GRZZ0002ZB-A), orange body with navy-blue cathode band; total mass ≈ 0.13 g; dimensions per SC-40 outline: 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 reference applications.

Compared with HZ30-2LTD-E, the MMBZ5256BLT1G offers SMT compatibility but sacrifices regulation accuracy and noise performance, while the BZX55-C30 matches the DO-35 form factor and power rating but lacks documented low-noise behavior - making HZ30-2LTD-E the preferred choice for metrology-grade analog references.

Availability

HZ30-2LTD-E is available at Aetrix Electronics and suitable for industrial power supplies, precision sensor interfaces, and test equipment requiring stable component supply with guaranteed long-term continuity and RoHS-compliant sourcing.

Supply support for HZ30-2LTD-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 Corporation is a global semiconductor manufacturer specializing in microcontrollers, analog and power devices, and SoC solutions for industrial, automotive, and infrastructure markets.

The HZ-L Series was developed specifically for low-noise voltage reference applications in precision analog systems - addressing demand for improved SNR and tighter regulation in next-generation instrumentation and sensor signal chains.

FAQ

What is the exact zener voltage range for HZ30-2LTD-E?

The HZ30-2LTD-E has a specified zener voltage range of 29.2 V to 30.6 V when tested at I_Z = 0.5 mA and T_a = 25°C, as confirmed in Table on page 3 of REJ03G0182-0300 Rev.3.00. This 1.4 V window reflects the device's grade within the HZ30-xL family and ensures predictable regulation behavior in production designs using HZ30-2LTD-E.

Is HZ30-2LTD-E RoHS compliant?

Yes, HZ30-2LTD-E is RoHS compliant per EU Directive 2011/65/EU, consistent with Renesas Electronics' environmental policy stated in the document footer and confirmed through Renesas' official compliance documentation. The device contains no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE above threshold limits, and is suitable for commercial and industrial applications requiring RoHS conformance.

What is the maximum power dissipation of HZ30-2LTD-E at 70°C ambient?

Per Figure 3 (Page 4 of REJ03G0182-0300 Rev.3.00), the HZ30-2LTD-E has a linear derating curve starting at 400 mW at 25°C, with full derating to 0 mW at 175°C. At 70°C ambient, the allowable power dissipation is approximately 310 mW - calculated using the slope of −3.33 mW/°C derived from (400 mW ÷ (175 − 25)°C), applied to the 45°C rise above 25°C.

Does HZ30-2LTD-E have a documented temperature coefficient?

Yes, the HZ30-2LTD-E exhibits a positive zener voltage temperature coefficient of approximately +0.06 %/°C (or +18 mV/°C), as shown in Figure 2 on page 4 of REJ03G0182-0300 Rev.3.00. This value is typical for 30 V-class Zener diodes and enables accurate thermal drift modeling in HZ30-2LTD-E-based reference circuits operating across −40°C to +85°C.

Can HZ30-2LTD-E be used in place of HZ30-2L?

Yes - HZ30-2LTD-E is a direct replacement for HZ30-2L, sharing identical electrical specifications, DO-35 package, and pinout. The "E" suffix denotes Renesas' updated part numbering convention post-merger (NEC + Renesas Technology), with no functional or parametric change. All HZ30-2LTD-E datasheet parameters match those of HZ30-2L in REJ03G0182-0300 Rev.3.00.