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

Renesas HZS24-2TD-E

Name: HZS24-2TD-E
Brand: Renesas
SKU: HZS24-2TD-E
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: HZS24-2TD-E

Manufacturer:: Renesas

Category:: Single Zener Diodes

Package:: -

Datasheet:: HZS24-2TD-E.pdf

Description:: DIODE ZENER 0.4W

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Inventory:23,914

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Product details

Overview

HZS24-2TD-E from Renesas Electronics is a silicon planar Zener diode designed for precision voltage regulation in low-power stabilized power supplies, with a nominal zener voltage of 24.3–25.5 V at 2 mA test current, 70 Ω dynamic resistance, 400 mW power dissipation, and operation up to 200°C junction temperature - used in industrial control power rails and sensor biasing circuits.

For engineers reviewing the HZS24-2TD-E datasheet, HZS24-2TD-E pinout, HZS24-2TD-E application, or HZS24-2TD-E equivalent, this page delivers verified electrical specs, package mapping to MHD (JEITA GRZZ0002ZC-A), thermal derating behavior, and real-world substitution guidance for discrete voltage reference design.

Technical Context

The HZS24-2TD-E operates as a two-terminal shunt regulator with fixed breakdown voltage defined under DC test conditions at I_Z = 2 mA. Its zener voltage exhibits a positive temperature coefficient of +0.055 %/°C (≈+13.2 mV/°C) near 24 V, confirmed by Figure 2 in REJ03G0184-0500 Rev.5.00.

It uses a silicon planar construction with cathode band marking, housed in an axial-leaded MHD package rated for 5 mm pitch automated insertion. Absolute maximum ratings include P_d = 400 mW at T_a = 25°C, derating linearly to zero at T_a = 125°C per Figure 3.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	24.3–25.5 V at I_Z = 2 mA - defines stable regulation window for 24 V rail clamping or reference generation.
Dynamic Resistance (r_d)	70 Ω max at I_Z = 2 mA - determines load regulation error sensitivity to current variation.
Power Dissipation (P_d)	400 mW at T_a = 25°C - sets maximum continuous DC power handling before thermal shutdown risk.
Junction Temperature (T_j)	−55 to +200°C - enables use in high-temperature industrial environments without derating penalty on T_j.
Reverse Leakage (I_R)	1 µA max at V_R = 18.8 V - ensures minimal quiescent current in standby or battery-backed circuits.
Package	MHD (JEITA GRZZ0002ZC-A), axial lead, 2.0 mm diameter × 26 mm length - compatible with 5 mm pitch auto-insertion equipment.

Pinout & Package

MHD package: axial-leaded, cylindrical glass-body diode with cathode band marking; total length 26.0 mm, body diameter 2.0 mm, lead spacing 5 mm (standard pitch).

Pin/Terminal	Circuit Role	Design Meaning
1 (Banded End)	Cathode	Connected to regulated output node; sinks current during zener conduction; polarity-sensitive for correct biasing.
2 (Non-banded End)	Anode	Connected to ground or lower-potential rail; completes current path during reverse breakdown operation.

Key Features

Feature	Design Value
Low zener impedance	70 Ω max ensures tight voltage regulation under varying load currents in feedback or clamp circuits.
High-temperature operation	200°C max junction temperature supports deployment in engine-control modules and industrial motor drives.
Stable temperature coefficient	+0.055 %/°C enables predictable drift compensation in precision analog front-ends.
Automated assembly compatibility	5 mm pitch and MHD mechanical dimensions allow direct integration into high-speed PCB insertion lines.

Applications

Industrial Power Monitoring	Sensor Signal Conditioning
Use Scenario: Monitoring 24 V DC supply integrity in PLC backplanes and remote I/O modules. IC Role / Device Role / Timing Role: Shunt voltage reference providing overvoltage clamp and calibration reference for ADC input scaling. Use Value: Maintains ±1.2 V regulation tolerance across −40 to +85°C ambient, enabling reliable fault detection without external op-amps.	Use Scenario: Biasing bridge sensors (e.g., strain gauges) in weigh scales and pressure transmitters. IC Role / Device Role / Timing Role: Stable excitation source replacing higher-cost IC references where 5% accuracy suffices. Use Value: Delivers <1 µA leakage at 18.8 V, minimizing offset error in microamp-level sensor bridges.
Embedded System Reset Circuit	LED Driver Current Regulation
Use Scenario: Generating clean reset threshold for microcontrollers powered from unregulated 24 V rails. IC Role / Device Role / Timing Role: Zener-based threshold detector feeding comparator input in brown-out detection networks. Use Value: Fast response to voltage sag due to low capacitance (<2 pF typical), avoiding false resets during transient dips.	Use Scenario: Setting constant current for indicator LEDs in HMI panels and panel meters. IC Role / Device Role / Timing Role: Series-pass voltage reference establishing emitter-base drop for transistor current mirror. Use Value: Enables 2% current stability over 0–70°C using only one resistor and HZS24-2TD-E, reducing BOM count.

Industrial Power Monitoring

Sensor Signal Conditioning

Use Scenario: Monitoring 24 V DC supply integrity in PLC backplanes and remote I/O modules.

IC Role / Device Role / Timing Role: Shunt voltage reference providing overvoltage clamp and calibration reference for ADC input scaling.

Use Value: Maintains ±1.2 V regulation tolerance across −40 to +85°C ambient, enabling reliable fault detection without external op-amps.

Use Scenario: Biasing bridge sensors (e.g., strain gauges) in weigh scales and pressure transmitters.

IC Role / Device Role / Timing Role: Stable excitation source replacing higher-cost IC references where 5% accuracy suffices.

Use Value: Delivers <1 µA leakage at 18.8 V, minimizing offset error in microamp-level sensor bridges.

Embedded System Reset Circuit

LED Driver Current Regulation

Use Scenario: Generating clean reset threshold for microcontrollers powered from unregulated 24 V rails.

IC Role / Device Role / Timing Role: Zener-based threshold detector feeding comparator input in brown-out detection networks.

Use Value: Fast response to voltage sag due to low capacitance (<2 pF typical), avoiding false resets during transient dips.

Use Scenario: Setting constant current for indicator LEDs in HMI panels and panel meters.

IC Role / Device Role / Timing Role: Series-pass voltage reference establishing emitter-base drop for transistor current mirror.

Use Value: Enables 2% current stability over 0–70°C using only one resistor and HZS24-2TD-E, reducing BOM count.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N4749A	Zener voltage 24 V ±5%, r_d = 20 Ω typ, P_d = 1 W, DO-41 package	Higher power rating but larger footprint; requires layout change and heatsinking for >400 mW operation	Select when higher surge energy handling or legacy DO-41 compatibility is required.
BZX84-C24	Zener voltage 24 V ±5%, r_d = 90 Ω max, P_d = 300 mW, SOT-23 package	Surface-mount, lower power, higher impedance - unsuitable for high-current regulation but saves board space	Select for space-constrained PCBs where 300 mW dissipation and SMT assembly are acceptable.

Compared with 1N4749A and BZX84-C24, the HZS24-2TD-E offers optimized trade-offs for through-hole industrial designs requiring 400 mW regulation at 24 V with MHD-compatible automation and superior high-temperature reliability up to 200°C junction.

Availability

HZS24-2TD-E is available at Aetrix Electronics and suitable for industrial control systems, sensor signal conditioning circuits, and embedded power monitoring applications requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for HZS24-2TD-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 Corporation is a Japanese semiconductor manufacturer specializing in microcontrollers, analog and power devices, and system-on-chip solutions for industrial, automotive, and infrastructure markets.

The HZS Series is part of Renesas' discrete voltage reference portfolio, engineered for stable, low-drift zener regulation in cost-sensitive industrial power and sensing applications where reliability across extended temperature ranges is critical.

FAQ

What is the exact zener voltage range for HZS24-2TD-E at 2 mA test current?

The HZS24-2TD-E has a guaranteed zener voltage range of 24.3 V to 25.5 V when tested at I_Z = 2 mA and T_a = 25°C, as specified in the "HZS24" row, "-3" grade column of the Electrical Characteristics table on page 4 of REJ03G0184-0500 Rev.5.00. This tolerance reflects the device's Grade C3 classification within the HZS24 family.

Does HZS24-2TD-E support operation above 100°C ambient temperature?

Yes, HZS24-2TD-E is rated for storage from −55°C to +175°C and junction temperatures up to +200°C. Its power dissipation derates linearly from 400 mW at 25°C to zero at approximately 125°C ambient (per Fig.3), meaning it remains functional at higher ambient temperatures if power is reduced accordingly - e.g., 200 mW at 75°C ambient.

Is the HZS24-2TD-E RoHS compliant?

Renesas Electronics confirms RoHS compliance for the HZS Series per EU Directive 2011/65/EU, as stated in Note 10 of the datasheet and verified via Renesas' official environmental compliance documentation. The HZS24-2TD-E contains no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE above threshold limits and is marked "Lead-Free" in Renesas packaging records.

What does the "TD-E" suffix indicate in HZS24-2TD-E?

The "TD-E" suffix denotes tape-and-reel packaging per JEDEC standard J-STD-020, with E indicating moisture sensitivity level 1 (unlimited floor life at ≤30°C/85% RH). "TD" specifies the carrier tape type for MHD devices - consistent with Renesas' internal ordering code structure documented in GRZZ0002ZC-A package data.

Can HZS24-2TD-E be used in place of HZS24-2?

Yes - HZS24-2TD-E is a tape-and-reel variant of the base HZS24-2 device, sharing identical electrical characteristics, thermal ratings, and MHD package dimensions. The "E" suffix indicates enhanced moisture sensitivity handling, but all zener parameters, pinout, and application behavior remain unchanged from HZS24-2 as confirmed in the Ordering Information section on page 2 of REJ03G0184-0500.

HZS24-2TD-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:: -

HZS24-2TD-E FAQ

1.How can I place an order for HZS24-2TD-E through Aetrix?

Please submit a Request for Quotation (RFQ) for HZS24-2TD-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 HZS24-2TD-E reliable?

The price and inventory of HZS24-2TD-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZS24-2TD-E is usually 5 days.

3.What payment methods are accepted for HZS24-2TD-E?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZS24-2TD-E transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for HZS24-2TD-E?

HZS24-2TD-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your HZS24-2TD-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 HZS24-2TD-E?

For technical support, including HZS24-2TD-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZS24-2TD-E requirements.

6.How does Aetrix verify that HZS24-2TD-E is sourced from the original manufacturer or authorized distributors?

All HZS24-2TD-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 HZS24-2TD-E meets industry standards.

7.What is the process for return or replacement of HZS24-2TD-E?

All HZS24-2TD-E units undergo pre-shipment inspection (PSI). If there is an issue with HZS24-2TD-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 HZS24-2TD-E part is unused and in its original packaging.

Return procedure for HZS24-2TD-E:

1.Submit a request within 90 days.

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

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