Renesas HZM2.0NBTL

Overview

HZM2.0NBTL 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 2.0 V (1.90–2.20 V at 5 mA), with dynamic resistance of 120 Ω, reverse current ≤120 µA at 0.5 V, and power dissipation up to 200 mW in MPAK package - commonly used in voltage regulation for sensor biasing and microcontroller reset circuitry.

For engineers reviewing the HZM2.0NBTL datasheet, HZM2.0NBTL pinout, HZM2.0NBTL application, or HZM2.0NBTL equivalent, key selection considerations include its tight 1.9–2.2 V zener tolerance at 5 mA, low 120 Ω dynamic impedance, NC-anode-cathode pin configuration in MPAK, and suitability for high-density SMT designs requiring stable sub-3 V references.

Technical Context

The HZM2.0NBTL operates as a two-terminal voltage reference device relying on controlled avalanche and Zener breakdown mechanisms. Its graded junction design enables stable operation at low test currents (IZ = 5 mA) and supports ambient temperatures from –55°C to +150°C.

Junction temperature is rated to 150°C, and thermal derating follows Fig.3 in the datasheet: power dissipation linearly decreases above 25°C ambient. The device exhibits a negative temperature coefficient (≈ –0.04 mV/°C near 2.0 V), confirmed in Fig.2, making it suitable for compensated reference designs where drift must be modeled.

Key Specifications

Pinout & Package

MPAK package (JEITA code PLSP0003ZC-A), 3-terminal surface-mount device with 0.35–0.5 mm lead width, 0.1–0.26 mm thickness, and 2.7–3.1 mm × 1.35–1.65 mm body dimensions. Terminal pitch (e) = 2.2–3.0 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX55C2V0 and MMSZ4678, the HZM2.0NBTL offers a unique NC pin for guard ring routing in mixed-signal PCBs, tighter 1.9–2.2 V grading (vs. ±5%), and MPAK's optimized thermal resistance for high-density thermal management - making it preferred for next-gen compact industrial and medical SMT systems.

Availability

HZM2.0NBTL is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, microcontroller reset circuitry, and portable medical instrument biasing requiring stable component supply, consistent lot-to-lot parametric performance, and RoHS-compliant packaging.

Supply support for HZM2.0NBTL 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 manufacturer headquartered in Japan, specializing in microcontrollers, analog power devices, and timing solutions for industrial, automotive, and infrastructure markets.

The HZM-N Series is part of Renesas' discrete Zener portfolio engineered for high-precision, low-noise voltage stabilization in space-constrained SMT applications - emphasizing tight V_Z grading, low dynamic impedance, and robust thermal performance.

FAQ

What is the zener voltage tolerance of HZM2.0NBTL at 5 mA?

The HZM2.0NBTL has a guaranteed zener voltage range of 1.90 V to 2.20 V when tested at I_Z = 5 mA and T_a = 25°C. This ±0.15 V spread (±7.5% of nominal 2.0 V) reflects Grade B specification per R07DS0358EJ0600 Rev.6.00, enabling predictable regulation in low-voltage reference designs without post-calibration trimming.

Does HZM2.0NBTL require a series resistor in typical shunt regulation use?

Yes, HZM2.0NBTL requires an external current-limiting resistor to set the operating zener current between 1 mA and 5 mA. For example, with a 3.3 V supply and target I_Z = 5 mA, a 260 Ω resistor ensures proper biasing while keeping power dissipation within the 200 mW limit. The NC pin does not affect this requirement.

Can HZM2.0NBTL be used in place of a 2.048 V bandgap reference IC?

The HZM2.0NBTL provides 2.0 V regulation but lacks the temperature stability and initial accuracy of dedicated bandgap ICs like REF3020. Its ≈ –0.04 mV/°C tempco introduces ~1.2 mV drift over 30°C, whereas REF3020 achieves ±10 ppm/°C. Use HZM2.0NBTL only where moderate drift is acceptable and ultra-low quiescent current is critical.

What is the meaning of "B" grade in HZM2.0NBTL?

The "B" in HZM2.0NBTL denotes the zener voltage grade per Renesas' ordering nomenclature - indicating a 1.90–2.20 V tolerance band at 5 mA. Unlike B1/B2/B3 grades used for higher-voltage variants (e.g., HZM6.2NB1), the HZM2.0N series uses only Grade B, confirmed in the Electrical Characteristics table on page 2 of R07DS0358EJ0600.

Is the NC pin on HZM2.0NBTL internally connected or should it be left floating?

Pin 1 of HZM2.0NBTL is explicitly designated "NC" (No Connect) in the Pin Arrangement diagram on page 1 of the datasheet. It is not internally bonded and must remain electrically floating - no PCB trace, solder mask opening, or thermal pad connection is permitted to avoid parasitic coupling or mechanical stress on the die.