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

Renesas HZS5B2J-E

Name: HZS5B2J-E
Brand: Renesas
SKU: HZS5B2J-E
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: HZS5B2J-E

Manufacturer:: Renesas

Category:: Single Zener Diodes

Package:: -

Datasheet:: HZS5B2J-E.pdf

Description:: DIODE ZENER

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Product details

Overview

HZS5B2J-E from ROHM Semiconductor is a silicon epitaxial planar Zener diode designed for precision voltage regulation in low-power stabilized DC supplies. It delivers a nominal zener voltage of 4.7 V (min 4.6 V, max 4.8 V) at 5 mA test current, with dynamic resistance ≤100 Ω, maximum power dissipation of 400 mW, and operates across -55°C to +175°C storage temperature range. It is used in voltage reference circuits for sensor signal conditioning.

For engineers reviewing the HZS5B2J-E datasheet, HZS5B2J-E pinout, HZS5B2J-E application, or HZS5B2J-E equivalent, key selection criteria include its tight 4.6–4.8 V zener tolerance at 5 mA, low 100 Ω dynamic impedance, 400 mW power rating, and suitability for 5 mm-pitch automated insertion in compact power rails.

Technical Context

This discrete Zener diode employs silicon epitaxial planar construction to achieve stable breakdown characteristics with low leakage and predictable temperature coefficient behavior. Its design targets fixed-voltage clamping and reference functions where accuracy, repeatability, and thermal stability are required under low-current bias conditions.

It operates exclusively in reverse-bias mode with specified zener voltage tested under DC conditions. The device exhibits a typical temperature coefficient near 0 mV/°C for the 4.7 V grade (B2), as confirmed by Figure 2 in the official datasheet, and maintains rated performance up to 200°C junction temperature.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	4.6 V min / 4.8 V max at I_Z = 5 mA - defines regulated output voltage window under standard bias
Dynamic Resistance (r_d)	≤100 Ω at I_Z = 5 mA - determines load regulation sensitivity and ripple rejection capability
Power Dissipation (P_d)	400 mW at T_a = 25°C - sets maximum continuous DC power handling before thermal derating
Reverse Current (I_R)	≤5 µA at V_R = 1.5 V - ensures minimal standby leakage in high-impedance reference nodes
Junction Temperature (T_j)	200°C max - supports operation in thermally demanding industrial environments without parameter shift
Storage Temperature	-55°C to +175°C - enables use in automotive under-hood and industrial control enclosures

Pinout & Package

Package: DO-35 (glass axial leaded, 5 mm pitch compatible). Standard cathode-band marking identifies terminal 1 as cathode, terminal 2 as anode.

Pin/Terminal	Circuit Role	Design Meaning
1 (Banded End)	Cathode	Connected to higher potential node; reverse-bias voltage applied across cathode-to-anode
2 (Non-banded End)	Anode	Connected to lower potential (typically ground or return); completes reverse-bias path

Key Features

Feature	Design Value
Low zener impedance	≤100 Ω ensures stable regulation under varying load currents in feedback references
400 mW power rating	Enables direct replacement of legacy 1/4 W Zeners without board redesign or heatsinking
Tight V_Z tolerance (B2 grade)	±0.1 V window at 4.7 V supports ±2% system-level voltage reference accuracy
5 mm pitch compatibility	Supports high-speed automatic insertion in volume manufacturing of power supply PCBs

Applications

Industrial Sensor Reference	Low-Power MCU Reset Circuit
Use Scenario: Providing stable 4.7 V reference for analog front-end amplifiers in pressure and temperature transducers. IC Role / Device Role / Timing Role: Voltage reference element establishing precise bias point for op-amp input stages. Use Value: Low 100 Ω dynamic resistance minimizes output drift under varying sensor bridge currents.	Use Scenario: Generating clean reset threshold for 3.3 V microcontrollers during brown-out conditions. IC Role / Device Role / Timing Role: Zener-clamped voltage divider setting reliable reset activation level. Use Value: Tight 4.6–4.8 V tolerance ensures consistent reset assertion across temperature and unit variance.
DC-DC Feedback Divider	ESD-Protected Interface Clamp
Use Scenario: Setting regulated output voltage in isolated flyback converters via optocoupler feedback network. IC Role / Device Role / Timing Role: Precision shunt reference defining secondary-side regulation setpoint. Use Value: Stable V_Z and low temperature coefficient maintain ±1% output accuracy over -40°C to +105°C ambient.	Use Scenario: Protecting RS-485 receiver inputs against transient overvoltage while preserving signal integrity. IC Role / Device Role / Timing Role: Low-leakage (≤5 µA) shunt clamp limiting common-mode voltage swing. Use Value: Minimal leakage avoids loading high-impedance bus lines; 400 mW rating absorbs repetitive ESD pulses.

Industrial Sensor Reference

Low-Power MCU Reset Circuit

Use Scenario: Providing stable 4.7 V reference for analog front-end amplifiers in pressure and temperature transducers.

IC Role / Device Role / Timing Role: Voltage reference element establishing precise bias point for op-amp input stages.

Use Value: Low 100 Ω dynamic resistance minimizes output drift under varying sensor bridge currents.

Use Scenario: Generating clean reset threshold for 3.3 V microcontrollers during brown-out conditions.

IC Role / Device Role / Timing Role: Zener-clamped voltage divider setting reliable reset activation level.

Use Value: Tight 4.6–4.8 V tolerance ensures consistent reset assertion across temperature and unit variance.

DC-DC Feedback Divider

ESD-Protected Interface Clamp

Use Scenario: Setting regulated output voltage in isolated flyback converters via optocoupler feedback network.

IC Role / Device Role / Timing Role: Precision shunt reference defining secondary-side regulation setpoint.

Use Value: Stable V_Z and low temperature coefficient maintain ±1% output accuracy over -40°C to +105°C ambient.

Use Scenario: Protecting RS-485 receiver inputs against transient overvoltage while preserving signal integrity.

IC Role / Device Role / Timing Role: Low-leakage (≤5 µA) shunt clamp limiting common-mode voltage swing.

Use Value: Minimal leakage avoids loading high-impedance bus lines; 400 mW rating absorbs repetitive ESD pulses.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N4732A	4.7 V nominal, ±5% tolerance (4.47–4.94 V), 1.0 W rating, DO-41 package	Higher power but looser tolerance; larger footprint requires layout change	Preferred when >400 mW surge handling is needed and board space allows DO-41
BZX55C4V7	4.7 V nominal, ±5% tolerance, 500 mW rating, DO-35 package, higher r_d (~130 Ω)	Same outline but higher dynamic impedance reduces regulation precision	Acceptable where cost is prioritized over tight regulation and low noise

Compared with 1N4732A and BZX55C4V7, the HZS5B2J-E offers superior voltage accuracy (±0.1 V vs. ±5%), lower dynamic impedance (≤100 Ω), and optimized 5 mm pitch compatibility-making it ideal for space-constrained, high-precision reference designs requiring repeatable performance.

Availability

HZS5B2J-E is available at Aetrix Electronics and suitable for industrial sensor reference, low-power MCU reset circuit, and DC-DC feedback divider applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for HZS5B2J-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

ROHM Semiconductor is a Japanese semiconductor manufacturer specializing in analog, power, and sensor solutions for automotive, industrial, and consumer systems.

HZS5B2J-E belongs to the HZS Series of silicon epitaxial planar Zener diodes, engineered for high-accuracy voltage stabilization in compact, automated-assembly power supply designs.

FAQ

What is the exact zener voltage range for HZS5B2J-E?

The HZS5B2J-E has a guaranteed zener voltage range of 4.6 V minimum to 4.8 V maximum when tested at I_Z = 5 mA and T_a = 25°C. This B2 grade specification reflects ±0.1 V tolerance around the nominal 4.7 V rating, confirmed in the Electrical Characteristics table on page 3 of the official ROHM datasheet ADE-208-120A(Z) Rev 1.

Is HZS5B2J-E suitable for surface-mount assembly?

No, HZS5B2J-E uses a DO-35 glass axial package with radial leads and is designed for through-hole mounting. Its datasheet explicitly states suitability for "5mm-pitch high speed automatic insertion," confirming compatibility with axial leaded pick-and-place and wave soldering-not SMT reflow. For SMT alternatives, consider ROHM's UDZS series.

What is the maximum reverse leakage current for HZS5B2J-E?

The maximum reverse leakage current (I_R) for HZS5B2J-E is 5 µA, measured at V_R = 1.5 V and T_a = 25°C. This low leakage supports high-impedance reference nodes and minimizes error in precision voltage divider networks where the HZS5B2J-E is deployed.

Does HZS5B2J-E have a specified temperature coefficient?

Yes, the HZS5B2J-E exhibits a zener voltage temperature coefficient near 0 mV/°C, as shown in Figure 2 of the datasheet for the 4.7 V B2 grade. This near-zero TC enables stable reference performance across industrial temperature ranges without external compensation.

Can HZS5B2J-E replace older 1N4732A diodes in existing designs?

HZS5B2J-E can functionally replace 1N4732A in low-power applications (<400 mW), but it is not a drop-in replacement due to tighter tolerance (±0.1 V vs. ±5%), lower power rating (400 mW vs. 1.0 W), and identical DO-35 outline. Layout remains compatible, but thermal and accuracy trade-offs must be verified per circuit requirements.

HZS5B2J-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:: -

HZS5B2J-E FAQ

1.How can I place an order for HZS5B2J-E through Aetrix?

Please submit a Request for Quotation (RFQ) for HZS5B2J-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 HZS5B2J-E reliable?

The price and inventory of HZS5B2J-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZS5B2J-E is usually 5 days.

3.What payment methods are accepted for HZS5B2J-E?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZS5B2J-E transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for HZS5B2J-E?

HZS5B2J-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your HZS5B2J-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 HZS5B2J-E?

For technical support, including HZS5B2J-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZS5B2J-E requirements.

6.How does Aetrix verify that HZS5B2J-E is sourced from the original manufacturer or authorized distributors?

All HZS5B2J-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 HZS5B2J-E meets industry standards.

7.What is the process for return or replacement of HZS5B2J-E?

All HZS5B2J-E units undergo pre-shipment inspection (PSI). If there is an issue with HZS5B2J-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 HZS5B2J-E part is unused and in its original packaging.

Return procedure for HZS5B2J-E:

1.Submit a request within 90 days.

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

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