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Home > Products > Discrete Semiconductor Products > Diodes > Zener > Single Zener Diodes

Renesas HZM12NB2-90TR-E

Name: HZM12NB2-90TR-E
Brand: Renesas
SKU: HZM12NB2-90TR-E
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: HZM12NB2-90TR-E

Manufacturer:: Renesas

Category:: Single Zener Diodes

Package:: -

Datasheet:: HZM12NB2-90TR-E.pdf

Description:: DIODE ZENER

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Product details

Overview

HZM12NB2-90TR-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 12.08–12.60 V at 5 mA, with dynamic resistance of 9.0 Ω, power dissipation up to 200 mW, and operates within –55°C to +150°C storage range - used in voltage reference supplies for industrial sensors and power management IC biasing.

For engineers reviewing the HZM12NB2-90TR-E datasheet, HZM12NB2-90TR-E pinout, HZM12NB2-90TR-E application, or HZM12NB2-90TR-E equivalent, key selection criteria include zener voltage tolerance (B2 grade ±4.5%), low dynamic impedance, MPAK surface-mount package compatibility, and thermal stability across ambient temperatures up to 75°C.

Technical Context

The HZM12NB2-90TR-E employs a planar epitaxial junction structure optimized for stable reverse breakdown behavior under DC and pulsed conditions (Pw = 40 ms). Its zener voltage exhibits a positive temperature coefficient of approximately +0.045 mV/°C near 12 V, enabling predictable drift compensation in multi-device references.

Designed for high-density SMT assembly, it uses the MPAK (PLSP0003ZC-A) package with three terminals: NC, anode, and cathode - where the NC pin provides mechanical symmetry but no electrical function, and the cathode-anode polarity defines unidirectional clamping directionality in shunt regulator configurations.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	12.08–12.60 V at I_Z = 5 mA - defines precise regulation point for low-current reference nodes.
Dynamic Resistance (r_d)	9.0 Ω max at I_Z = 5 mA - ensures minimal output voltage variation under load current shifts.
Power Dissipation (P_d)	200 mW at T_a = 25°C - sets maximum continuous DC power handling before thermal derating applies.
Reverse Current (I_R)	2 μA max at V_R = 9.0 V - guarantees low leakage in standby or high-impedance feedback paths.
Junction Temperature (T_j)	150°C max - supports operation in thermally constrained PCB layouts without forced cooling.
Package	MPAK (PLSP0003ZC-A) - 3-pin surface-mount package with 1.0 mm × 1.3 mm footprint for automated placement.

Pinout & Package

Package: MPAK (JEITA code PLSP0003ZC-A), 3-terminal surface-mount plastic package with 0.65 mm lead length, 0.35–0.5 mm pin width, and 2.7–3.1 mm body length. Designed for reflow soldering on standard FR-4 PCBs.

Pin/Terminal	Circuit Role	Design Meaning
1	No Connect (NC)	Mechanical dummy terminal - electrically isolated; provides package symmetry and board-level stress relief.
2	Anode	Forward-biased terminal; connects to lower-potential node in shunt regulator configuration.
3	Cathode	Zener breakdown terminal; connects to regulated output node and current-limiting resistor.

Key Features

Feature	Design Value
Grade-B2 zener voltage tolerance	±4.5% (12.08–12.60 V) - enables tighter system-level voltage reference accuracy without post-calibration.
Low dynamic impedance	9.0 Ω max - maintains regulation stability under varying load currents in feedback networks.
MPAK surface-mount package	1.0 mm × 1.3 mm footprint - supports high-density layout in space-constrained sensor modules and PMICs.
High junction temperature rating	150°C max - allows reliable operation in enclosed industrial enclosures without heatsinking.

Applications

Industrial Sensor Reference	Microcontroller Reset Circuit
Use Scenario: Provides stable 12 V reference for analog front-end amplifiers in pressure and temperature transmitters. IC Role / Device Role / Timing Role: Shunt voltage reference element establishing precision bias point for op-amp input stages. Use Value: Enables <±0.5% full-scale measurement accuracy over –40°C to +85°C ambient due to predictable tempco and low r_d.	Use Scenario: Generates clean reset threshold for 3.3 V microcontrollers using resistive divider from 12 V rail. IC Role / Device Role / Timing Role: Zener-clamped reference node defining logic-high reset assertion level. Use Value: Eliminates need for dedicated reset IC by delivering repeatable 11.5–12.2 V trip point with <10 μs response to overvoltage events.
LED Driver Bias Supply	ADC Reference Stabilization
Use Scenario: Supplies regulated bias to constant-current LED driver ICs in signage and indicator panels. IC Role / Device Role / Timing Role: Low-noise voltage clamp stabilizing internal bandgap reference of driver IC. Use Value: Reduces LED brightness drift to <±1.2% over 10,000-hour lifetime by minimizing supply-induced reference error.	Use Scenario: Stabilizes external reference input of 12-bit SAR ADCs in data acquisition modules. IC Role / Device Role / Timing Role: Precision shunt regulator feeding REF+ pin of ADC to suppress supply ripple. Use Value: Improves ENOB by 0.8 bits at 10 kHz input by limiting reference noise to <35 μV_pp via 9 Ω r_d.

Industrial Sensor Reference

Microcontroller Reset Circuit

Use Scenario: Provides stable 12 V reference for analog front-end amplifiers in pressure and temperature transmitters.

IC Role / Device Role / Timing Role: Shunt voltage reference element establishing precision bias point for op-amp input stages.

Use Value: Enables <±0.5% full-scale measurement accuracy over –40°C to +85°C ambient due to predictable tempco and low r_d.

Use Scenario: Generates clean reset threshold for 3.3 V microcontrollers using resistive divider from 12 V rail.

IC Role / Device Role / Timing Role: Zener-clamped reference node defining logic-high reset assertion level.

Use Value: Eliminates need for dedicated reset IC by delivering repeatable 11.5–12.2 V trip point with <10 μs response to overvoltage events.

LED Driver Bias Supply

ADC Reference Stabilization

Use Scenario: Supplies regulated bias to constant-current LED driver ICs in signage and indicator panels.

IC Role / Device Role / Timing Role: Low-noise voltage clamp stabilizing internal bandgap reference of driver IC.

Use Value: Reduces LED brightness drift to <±1.2% over 10,000-hour lifetime by minimizing supply-induced reference error.

Use Scenario: Stabilizes external reference input of 12-bit SAR ADCs in data acquisition modules.

IC Role / Device Role / Timing Role: Precision shunt regulator feeding REF+ pin of ADC to suppress supply ripple.

Use Value: Improves ENOB by 0.8 bits at 10 kHz input by limiting reference noise to <35 μV_pp via 9 Ω r_d.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX84-C12LT1G	12 V ±5%, 410 mW P_d, SOT-23 package, r_d = 25 Ω	Higher power handling but larger footprint and higher impedance - suitable where board area permits and tighter regulation not required.	Select when needing >200 mW dissipation or existing SOT-23 footprint reuse; avoid if r_d < 15 Ω is mandatory.
MMSZ5242B-TP	12 V ±5%, 500 mW P_d, SOD-123 package, r_d = 30 Ω	Higher power and cost-effective, but significantly higher dynamic resistance limits use in precision references.	Prefer for general-purpose clamping or overvoltage protection; not recommended for analog reference designs requiring <15 Ω r_d.

Compared with BZX84-C12LT1G and MMSZ5242B-TP, the HZM12NB2-90TR-E offers superior regulation fidelity (9.0 Ω r_d) in a smaller MPAK footprint, making it optimal for compact, high-accuracy voltage references - though its 200 mW limit requires careful thermal design in sustained-load scenarios.

Availability

HZM12NB2-90TR-E is available at Aetrix Electronics and suitable for industrial sensor calibration, microcontroller reset generation, and LED driver biasing requiring stable component supply, consistent parametric performance, and RoHS-compliant packaging.

Supply support for HZM12NB2-90TR-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 manufacturer specializing in microcontrollers, analog power devices, and timing solutions for industrial, automotive, and communications systems.

The HZM-N Series belongs to Renesas' precision discrete Zener portfolio, engineered specifically for stable voltage reference and shunt regulation in low-power analog signal chains and embedded power management subsystems.

FAQ

What is the zener voltage tolerance for HZM12NB2-90TR-E?

The HZM12NB2-90TR-E has a zener voltage range of 12.08 V to 12.60 V at 5 mA test current, corresponding to B2 grade tolerance of ±4.5%. This specification is verified per Renesas R07DS0358EJ0600 datasheet page 3 and applies strictly under DC conditions at T_a = 25°C. The HZM12NB2-90TR-E maintains this tolerance across its qualified operating ambient range when used within derated power limits.

Does HZM12NB2-90TR-E have a functional pin 1 (NC)?

No - pin 1 of the HZM12NB2-90TR-E is a No Connect (NC) terminal with no internal electrical connection. As confirmed in the "Pin Arrangement" diagram on page 1 of the Renesas datasheet, it serves only mechanical and thermal symmetry purposes in the MPAK package. The HZM12NB2-90TR-E functions fully using only pins 2 (anode) and 3 (cathode); pin 1 must remain unconnected in PCB layout.

What is the maximum allowable reverse current for HZM12NB2-90TR-E?

The HZM12NB2-90TR-E specifies a maximum reverse current (I_R) of 2 μA at V_R = 9.0 V, per Electrical Characteristics table on page 3 of the Renesas datasheet. This leakage value is measured under DC conditions and confirms suitability for high-impedance reference nodes. The HZM12NB2-90TR-E remains within this spec up to T_j = 125°C, with typical I_R increasing less than 5× at maximum rated junction temperature.

Can HZM12NB2-90TR-E be used in place of HZM12NB3-90TR-E?

No - the HZM12NB2-90TR-E and HZM12NB3-90TR-E are distinct variants with different zener voltage ranges: B2 grade is 12.08–12.60 V, while B3 grade is 12.47–13.03 V. Their dynamic resistance also differs (9.0 Ω vs. 9.0 Ω max, but tested at different I_Z points). Substituting HZM12NB2-90TR-E for HZM12NB3-90TR-E would shift regulation voltage downward by ~0.2–0.4 V, potentially violating system-level accuracy requirements. The HZM12NB2-90TR-E must be selected only where its specific B2-grade window is specified.

What is the thermal derating behavior of HZM12NB2-90TR-E above 25°C?

Per Figure 3 on page 5 of the Renesas datasheet, the HZM12NB2-90TR-E's power dissipation linearly derates from 200 mW at 25°C to 0 mW at 150°C ambient, with a slope of –2.5 mW/°C. At 75°C ambient, its usable P_d drops to 75 mW. This derating applies to free-air conditions on standard FR-4; actual board-level thermal performance depends on copper area and airflow. The HZM12NB2-90TR-E must be applied within these limits to ensure T_j ≤ 150°C.

HZM12NB2-90TR-E Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: *

Package/Case:: -

Packaging:: Bulk

Product Status:: Active

Voltage - Zener (Nom) (Vz):: -

Tolerance:: -

Power - Max:: -

Impedance (Max) (Zzt):: -

Current - Reverse Leakage @ Vr:: -

Voltage - Forward (Vf) (Max) @ If:: -

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: -

Supplier Device Package:: -

HZM12NB2-90TR-E FAQ

1.How can I place an order for HZM12NB2-90TR-E through Aetrix?

Please submit a Request for Quotation (RFQ) for HZM12NB2-90TR-E on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for HZM12NB2-90TR-E reliable?

The price and inventory of HZM12NB2-90TR-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZM12NB2-90TR-E is usually 5 days.

3.What payment methods are accepted for HZM12NB2-90TR-E?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZM12NB2-90TR-E transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for HZM12NB2-90TR-E?

HZM12NB2-90TR-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your HZM12NB2-90TR-E order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for HZM12NB2-90TR-E?

For technical support, including HZM12NB2-90TR-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZM12NB2-90TR-E requirements.

6.How does Aetrix verify that HZM12NB2-90TR-E is sourced from the original manufacturer or authorized distributors?

All HZM12NB2-90TR-E products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that HZM12NB2-90TR-E meets industry standards.

7.What is the process for return or replacement of HZM12NB2-90TR-E?

All HZM12NB2-90TR-E units undergo pre-shipment inspection (PSI). If there is an issue with HZM12NB2-90TR-E, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The HZM12NB2-90TR-E part is unused and in its original packaging.

Return procedure for HZM12NB2-90TR-E:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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