Renesas HZM24NB-JTL-E

Overview

HZM24NB-JTL-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 24.54 V to 25.57 V at 5 mA test current, with dynamic resistance of 60 Ω, power dissipation up to 200 mW, and operates within –55°C to +150°C storage temperature range - commonly used in voltage regulation for sensor signal conditioning and power supply feedback loops.

For engineers reviewing the HZM24NB-JTL-E datasheet, HZM24NB-JTL-E pinout, HZM24NB-JTL-E application, or HZM24NB-JTL-E equivalent, this page provides verified package mapping (MPAK), terminal roles (NC/Anode/Cathode), zener tolerance grade B3, thermal derating behavior, and direct alternative options for voltage reference design continuity.

Technical Context

The HZM24NB-JTL-E employs a planar epitaxial junction structure optimized for stable reverse breakdown with low temperature coefficient (≈+0.07 mV/°C at 24 V) and minimal voltage drift over time. Its graded doping profile ensures predictable zener knee characteristics and tight voltage distribution across production lots.

Designed for surface-mount operation in high-density PCB layouts, it uses a three-terminal MPAK (PLSP0003ZC-A) package with non-connected (NC) Pin 1, enabling layout flexibility while maintaining mechanical robustness and thermal performance under pulsed 40 ms test conditions.

Key Specifications

Pinout & Package

MPAK package (JEITA code PLSP0003ZC-A) features a compact 3-pin SMT outline with 1.0 mm × 1.3 mm body, 0.35–0.5 mm lead width, and 2.2–3.0 mm e pitch. Pin 1 is NC (no internal connection), enabling routing isolation without functional impact.

Key Features

Applications

Equivalent & Alternatives

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

Compared with HZM24NB-JTL-E, BZX84-C24LT1G offers higher power margin but sacrifices 2.5× tighter voltage control, while MMSZ5248B-TP trades MPAK's NC-pin routing advantage for lower unit cost and wider availability - making HZM24NB-JTL-E optimal for precision industrial references where layout density and grading consistency are prioritized.

Availability

HZM24NB-JTL-E is available at Aetrix Electronics and suitable for industrial sensor interfaces, low-power ADC references, and isolated SMPS feedback circuits requiring stable component supply with guaranteed long-term sourcing.

Supply support for HZM24NB-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 specializing in microcontrollers, analog, and power devices, with core expertise in industrial, automotive, and infrastructure applications.

HZM24NB-JTL-E belongs to the HZM-N Series of silicon epitaxial planar Zener diodes engineered specifically for high-stability voltage regulation in space-constrained, thermally demanding environments.

FAQ

What is the exact zener voltage range for HZM24NB-JTL-E at 5 mA?

The HZM24NB-JTL-E has a guaranteed zener voltage range of 24.54 V to 25.57 V when tested at I_Z = 5 mA, corresponding to Grade B3 tolerance per Renesas datasheet R07DS0358EJ0600. This 1.03 V span reflects ±2.1% accuracy around the nominal 24 V rating, validated across production lots using pulse testing (P_w = 40 ms).

Does HZM24NB-JTL-E have a functional pin 1, and what happens if it's connected?

No - Pin 1 of HZM24NB-JTL-E is explicitly designated NC (No Connection) in the datasheet pin arrangement diagram and has no internal electrical connection. Connecting Pin 1 to ground or any net will not affect zener operation, but may introduce unintended parasitic capacitance or solder bridging risk; best practice is to leave it unconnected or use as a keep-out zone.

How does the dynamic resistance of HZM24NB-JTL-E impact load regulation in a reference circuit?

The HZM24NB-JTL-E's dynamic resistance of 60 Ω max directly determines how much the output voltage shifts with load current changes: ΔV_Z ≈ r_d × ΔI_Z. For example, a 1 mA load variation causes ≤60 mV drift - critical for maintaining <0.1% reference stability in precision analog front-ends where HZM24NB-JTL-E is deployed.

Can HZM24NB-JTL-E replace older through-hole zeners like 1N4749A in new designs?

Yes, HZM24NB-JTL-E can replace 1N4749A (24 V, ±5%, DO-41) in new SMT designs, offering tighter B3 grading (±2.1% vs ±5%), smaller MPAK footprint, and lower r_d (60 Ω vs 20 Ω typical but unspecified min/max). However, PCB layout must change from axial leads to 3-pad MPAK, and thermal design must account for different derating curves - HZM24NB-JTL-E drops to ~120 mW at 70°C ambient per Fig.3.

What is the temperature coefficient of HZM24NB-JTL-E, and how does it affect long-term stability?

HZM24NB-JTL-E exhibits a positive temperature coefficient of approximately +0.07 mV/°C near 24 V, as shown in Fig.2 of the datasheet. This means its zener voltage increases by ~0.07 mV per °C rise - translating to +1.68 mV over a 24°C ambient shift. In systems requiring <0.05% drift, this must be compensated via circuit topology or selected alongside complementary tempcos.