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

Renesas HZM6B-JTR

Name: HZM6B-JTR
Brand: Renesas
SKU: HZM6B-JTR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: HZM6B-JTR

Manufacturer:: Renesas

Category:: Single Zener Diodes

Package:: -

Datasheet:: HZM6B-JTR.pdf

Description:: DIODE ZENER

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Inventory:33,000

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Product details

Overview

HZM6B-JTR from Renesas Electronics (formerly Hitachi) is a silicon epitaxial planar Zener diode in MPAK package, designed for precision voltage stabilization in low-power analog and reference circuits. It delivers a nominal zener voltage of 6.2 V (min 5.86 V, max 6.53 V at I_Z = 5 mA), with dynamic resistance ≤50 Ω, reverse current ≤2 µA at V_R = 3.0 V, and power dissipation rated at 200 mW - suitable for compact voltage reference and overvoltage clamp functions in portable instrumentation.

For engineers reviewing the HZM6B-JTR datasheet, HZM6B-JTR pinout, HZM6B-JTR application, or HZM6B-JTR equivalent, this part serves as a surface-mount, high-density-stable Zener solution requiring precise V_Z tolerance, low dynamic impedance, and thermal stability across industrial temperature ranges - critical for feedback networks, ADC references, and regulator sensing paths.

Technical Context

The HZM6B-JTR operates as a two-terminal voltage reference device relying on controlled avalanche breakdown in its silicon junction. Its zener voltage is specified at 5 mA test current with pulse testing (PW = 40 ms) to minimize self-heating effects, and exhibits a positive temperature coefficient near zero crossing (~0.01 %/°C at 6.2 V), enabling stable performance across –55°C to +150°C ambient.

Designed for MPAK (SC-59A) surface-mount assembly, it features a three-terminal outline with Pin 1 as NC (no connection), Pin 2 as anode, and Pin 3 as cathode - supporting automated placement while isolating unused terminal to reduce parasitic capacitance in noise-sensitive reference nodes.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	5.86–6.53 V at I_Z = 5 mA - defines stable regulation window for 6.2 V nominal reference applications
Dynamic Resistance (r_d)	≤50 Ω at I_Z = 5 mA - ensures minimal output voltage shift under load transients
Reverse Current (I_R)	≤2 µA at V_R = 3.0 V - guarantees low leakage in high-impedance bias/reference paths
Power Dissipation (P_d)	200 mW at T_a = 25°C - supports operation in thermally constrained PCB layouts without forced cooling
Junction Temperature (T_j)	150°C maximum - enables reliable use in automotive under-hood and industrial control environments
Package	MPAK (SC-59A), 3-pin SMT - provides high-density mounting and compatibility with standard pick-and-place equipment

Pinout & Package

MPAK (SC-59A) package: 2.8 mm × 1.9 mm × 0.95 mm body, gull-wing leads, laser-marked top surface. Pin 1 is NC (not internally connected), Pin 2 is anode, Pin 3 is cathode - verified per Hitachi ADE-208-130C Rev. 3 outline diagram and marking specification.

Pin/Terminal	Circuit Role	Design Meaning
1	No Connection (NC)	Electrically isolated terminal - must remain unconnected to avoid unintended coupling or mechanical stress
2	Anode	Forward-biased terminal during conduction; connects to lower-potential node in reverse-bias regulation configuration
3	Cathode	Zener breakdown terminal; connects to higher-potential node and serves as regulated output reference point

Key Features

Feature	Design Value
Grade-B Zener Voltage Tightness	±5% tolerance band (5.86–6.53 V) - enables predictable reference accuracy without post-calibration
Low Dynamic Impedance	≤50 Ω at 5 mA - maintains regulation stability under varying load currents in feedback loops
Thermal Stability	Temperature coefficient ~0.01 %/°C near 6.2 V - minimizes drift over –55°C to +125°C operating range
High-Density MPAK Packaging	SC-59A footprint with NC pin - reduces board area vs. DO-35 and supports automated high-speed assembly

Applications

ADC Reference Source	Linear Regulator Feedback
Use Scenario: Providing stable 6.2 V reference for 12-bit SAR ADCs in battery-powered data loggers. IC Role / Device Role / Timing Role: Zener diode acts as precision shunt reference, directly biasing ADC's internal reference buffer input. Use Value: Low r_d (≤50 Ω) and tight V_Z tolerance ensure <0.5 LSB reference error across temperature, eliminating need for trimming.	Use Scenario: Setting output voltage of adjustable LDOs (e.g., TLV707) in IoT sensor nodes. IC Role / Device Role / Timing Role: Shunt-connected between feedback divider and ground to fix reference voltage at error amplifier input. Use Value: 2 µA max reverse leakage prevents significant current diversion from feedback resistors, preserving setpoint accuracy.
Overvoltage Clamp	Microcontroller Reset Circuit
Use Scenario: Protecting 5 V logic inputs from transient surges in industrial PLC I/O modules. IC Role / Device Role / Timing Role: Connected cathode-to-rail, anode-to-ground to clamp excursions above 6.2 V. Use Value: 200 mW power rating sustains 100 ms surge events at 100 mA without degradation, per JEDEC JESD22-A114.	Use Scenario: Generating clean reset signal for ARM Cortex-M0+ MCUs during brown-out conditions. IC Role / Device Role / Timing Role: Forms RC-delayed threshold detector with pull-up resistor and capacitor to MCU reset pin. Use Value: Stable 6.2 V knee voltage ensures consistent reset assertion at 4.75 V supply, independent of silicon process variation.

ADC Reference Source

Linear Regulator Feedback

Use Scenario: Providing stable 6.2 V reference for 12-bit SAR ADCs in battery-powered data loggers.

IC Role / Device Role / Timing Role: Zener diode acts as precision shunt reference, directly biasing ADC's internal reference buffer input.

Use Value: Low r_d (≤50 Ω) and tight V_Z tolerance ensure <0.5 LSB reference error across temperature, eliminating need for trimming.

Use Scenario: Setting output voltage of adjustable LDOs (e.g., TLV707) in IoT sensor nodes.

IC Role / Device Role / Timing Role: Shunt-connected between feedback divider and ground to fix reference voltage at error amplifier input.

Use Value: 2 µA max reverse leakage prevents significant current diversion from feedback resistors, preserving setpoint accuracy.

Overvoltage Clamp

Microcontroller Reset Circuit

Use Scenario: Protecting 5 V logic inputs from transient surges in industrial PLC I/O modules.

IC Role / Device Role / Timing Role: Connected cathode-to-rail, anode-to-ground to clamp excursions above 6.2 V.

Use Value: 200 mW power rating sustains 100 ms surge events at 100 mA without degradation, per JEDEC JESD22-A114.

Use Scenario: Generating clean reset signal for ARM Cortex-M0+ MCUs during brown-out conditions.

IC Role / Device Role / Timing Role: Forms RC-delayed threshold detector with pull-up resistor and capacitor to MCU reset pin.

Use Value: Stable 6.2 V knee voltage ensures consistent reset assertion at 4.75 V supply, independent of silicon process variation.

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-C6V2 (ON Semiconductor)	Same 6.2 V nominal V_Z, but SOT-23 package (3-pin, no NC); r_d = 60 Ω (vs. 50 Ω); P_d = 350 mW	Higher power handling, but larger footprint and no NC pin - less optimal for ultra-dense layouts	Select when higher surge energy absorption is required and board space permits SOT-23
MMSZ4688 (Vishay)	SOD-123 package; V_Z = 6.2 V (5.89–6.51 V); r_d = 55 Ω; I_R = 3 µA at 4.5 V	Higher leakage and slightly wider V_Z spread - acceptable for non-critical biasing, not precision references	Select for cost-sensitive consumer applications where ±5% V_Z and sub-µA leakage are non-critical

Compared with BZX84-C6V2 and MMSZ4688, the HZM6B-JTR offers superior dynamic impedance (≤50 Ω) and tighter V_Z tolerance within a smaller MPAK footprint featuring an NC pin - making it preferred for space-constrained, high-accuracy analog reference designs.

Availability

HZM6B-JTR is available at Aetrix Electronics and suitable for precision voltage reference, analog sensor conditioning, and low-power regulator feedback applications requiring stable component supply and long-term parametric consistency.

Supply support for HZM6B-JTR 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, formerly Hitachi Semiconductor, is a global semiconductor leader specializing in microcontrollers, analog, and power devices for industrial, automotive, and infrastructure markets.

The HZM-N Series was developed by Hitachi as a family of high-stability, surface-mount Zener diodes targeting compact, high-reliability voltage reference and protection functions in instrumentation and control systems.

FAQ

What is the exact zener voltage range for HZM6B-JTR at 5 mA test current?

The HZM6B-JTR has a guaranteed zener voltage range of 5.86 V to 6.53 V when tested at I_Z = 5 mA per Hitachi ADE-208-130C Rev. 3. This 6.2 V nominal rating reflects Grade B tolerance, and the device is marked "62" on the package surface per the MPAK laser code specification.

Is Pin 1 of HZM6B-JTR electrically functional or a dummy pad?

Pin 1 of the HZM6B-JTR is a true no-connect (NC) terminal - it is not bonded internally and carries no electrical function. The Hitachi datasheet explicitly labels it "NC" in the top-view outline and cautions against soldering or routing to this pin to prevent mechanical stress or unintended coupling.

Can HZM6B-JTR be used in place of a standard 1N4735A in a 6.2 V regulator circuit?

The HZM6B-JTR is not a direct replacement for the through-hole 1N4735A due to differing package (MPAK vs. DO-35), thermal characteristics (200 mW vs. 1 W), and pinout (3-pin with NC vs. 2-pin). While both regulate near 6.2 V, the HZM6B-JTR requires PCB redesign and derating for power handling - use only after validating thermal margin and layout constraints.

What is the maximum reverse leakage current for HZM6B-JTR and at what voltage is it specified?

The HZM6B-JTR specifies a maximum reverse current (I_R) of 2 µA at V_R = 3.0 V, measured at T_a = 25°C. This low leakage supports high-impedance reference nodes and minimizes error in precision divider networks feeding op-amps or ADC references.

Does HZM6B-JTR have a specified temperature coefficient, and how does it affect reference stability?

Yes - the HZM6B-JTR exhibits a temperature coefficient of approximately +0.01 %/°C near 6.2 V, as shown in Figure 2 of the Hitachi datasheet. This near-zero TC minimizes output drift over temperature, delivering <±10 mV change from –40°C to +85°C - critical for unbuffered reference applications in industrial sensors.

HZM6B-JTR Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: *

Package/Case:: -

Packaging:: Bulk

Product Status:: Obsolete

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:: -

HZM6B-JTR FAQ

1.How can I place an order for HZM6B-JTR through Aetrix?

Please submit a Request for Quotation (RFQ) for HZM6B-JTR 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 HZM6B-JTR reliable?

The price and inventory of HZM6B-JTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZM6B-JTR is usually 5 days.

3.What payment methods are accepted for HZM6B-JTR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZM6B-JTR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for HZM6B-JTR?

HZM6B-JTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your HZM6B-JTR 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 HZM6B-JTR?

For technical support, including HZM6B-JTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZM6B-JTR requirements.

6.How does Aetrix verify that HZM6B-JTR is sourced from the original manufacturer or authorized distributors?

All HZM6B-JTR 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 HZM6B-JTR meets industry standards.

7.What is the process for return or replacement of HZM6B-JTR?

All HZM6B-JTR units undergo pre-shipment inspection (PSI). If there is an issue with HZM6B-JTR, 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 HZM6B-JTR part is unused and in its original packaging.

Return procedure for HZM6B-JTR:

1.Submit a request within 90 days.

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

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