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

Renesas HZS2C1TD-E

Name: HZS2C1TD-E
Brand: Renesas
SKU: HZS2C1TD-E
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: HZS2C1TD-E

Manufacturer:: Renesas

Category:: Single Zener Diodes

Package:: -

Datasheet:: HZS2C1TD-E.pdf

Description:: DIODE ZENER 0.4W

Quantity:: RFQ Add To RFQ list

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Inventory:8,333

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Product details

Overview

HZS2C1TD-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 2.4 V (min 2.4 V / max 2.6 V), 400 mW power dissipation, and dynamic resistance of 100 Ω at 5 mA test current - used in voltage reference and overvoltage protection circuits for industrial control modules.

For engineers reviewing the HZS2C1TD-E datasheet, HZS2C1TD-E pinout, HZS2C1TD-E application, or HZS2C1TD-E equivalent, this device serves as a low-leakage, low-impedance voltage clamp in analog front-ends, sensor biasing networks, and DC-DC feedback paths where tight tolerance and thermal stability are required.

Technical Context

The HZS2C1TD-E operates as a two-terminal shunt regulator, maintaining stable output voltage across its cathode-anode terminals under reverse-biased conditions. Its zener breakdown mechanism delivers predictable conduction onset at 2.4–2.6 V with ≤5 µA reverse leakage at 0.5 V below V_Z.

Designed for surface-mount compatibility in MHD package (JEITA GRZZ0002ZC-A), it supports high-speed automatic insertion on 5 mm-pitch PCBs and exhibits a zener voltage temperature coefficient of approximately −3.5 mV/°C - typical for low-voltage Zeners in the 2–3 V range.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	2.4 V min / 2.6 V max at I_Z = 5 mA - defines precise clamping threshold for 2.5 V rail stabilization.
Power Dissipation (P_d)	400 mW - enables continuous operation up to ~166 mA at 2.4 V without heatsinking in ambient ≤70°C.
Dynamic Resistance (r_d)	100 Ω max at I_Z = 5 mA - ensures minimal output voltage shift under load transients in reference circuits.
Reverse Leakage Current (I_R)	≤5 µA at V_R = 0.5 V - guarantees negligible quiescent current draw in battery-powered bias networks.
Junction Temperature (T_j)	200°C maximum - supports reliable operation in enclosed industrial enclosures with limited airflow.
Package	MHD (JEITA GRZZ0002ZC-A) - 2-pin, axial-lead-compatible SMD package with 2.0 mm diameter and 26 mm body length.

Pinout & Package

MHD package: cylindrical glass-body surface-mount diode with cathode band marking; 2.0 mm diameter × 26.0 mm length; weight ≈ 0.084 g; lead-free compliant per RoHS.

Pin/Terminal	Circuit Role	Design Meaning
1 (Cathode)	Reverse-bias input terminal	Connected to regulated node; sinks current during zener conduction to maintain fixed voltage drop.
2 (Anode)	Reference/ground return	Biased at lower potential; completes current path through series resistor to unregulated supply.

Key Features

Feature	Design Value
Low zener impedance	100 Ω max ensures <±10 mV output variation under ±1 mA load step in feedback loops.
Wide zener voltage spectrum	Part of HZS Series covering 1.6–38 V - allows single-source selection across multiple voltage rails.
High-speed auto-insertion compatibility	5 mm pitch design enables direct integration into automated assembly lines without retooling.
Stable thermal coefficient	−3.5 mV/°C typical minimizes drift in temperature-sensitive analog signal conditioning stages.

Applications

Industrial Sensor Biasing	Microcontroller Reset Circuit
Use Scenario: Providing stable 2.5 V reference to analog sensors (e.g., pressure transducers) in PLC I/O modules operating from 5 V or 12 V rails. IC Role / Device Role / Timing Role: Shunt voltage reference establishing accurate excitation voltage independent of supply ripple. Use Value: Enables ±0.5% measurement accuracy by holding sensor bias within ±10 mV over −40°C to +85°C ambient.	Use Scenario: Generating clean reset threshold for 3.3 V microcontrollers in factory automation controllers. IC Role / Device Role / Timing Role: Zener-clamped RC network defining precise 2.4 V trigger point for POR (power-on reset) generation. Use Value: Guarantees deterministic reset assertion at 2.4–2.6 V, eliminating brown-out glitches during line-voltage sags.
DC-DC Feedback Divider	Overvoltage Clamp Protection
Use Scenario: Setting output voltage of isolated flyback converters via TL431-like feedback using discrete zener + transistor. IC Role / Device Role / Timing Role: Primary voltage reference element in optocoupler-coupled secondary-side regulation loop. Use Value: Delivers ±2% output regulation accuracy without integrated error amplifier, reducing BOM cost by 30%.	Use Scenario: Protecting ADC inputs from transient surges in motor drive control boards exposed to EMI. IC Role / Device Role / Timing Role: Fast-acting shunt clamp limiting input to 2.6 V before damage threshold of 3.6 V is reached. Use Value: Absorbs >100 mJ surge energy without degradation, extending system MTBF by 4× vs. standard TVS diodes.

Industrial Sensor Biasing

Microcontroller Reset Circuit

Use Scenario: Providing stable 2.5 V reference to analog sensors (e.g., pressure transducers) in PLC I/O modules operating from 5 V or 12 V rails.

IC Role / Device Role / Timing Role: Shunt voltage reference establishing accurate excitation voltage independent of supply ripple.

Use Value: Enables ±0.5% measurement accuracy by holding sensor bias within ±10 mV over −40°C to +85°C ambient.

Use Scenario: Generating clean reset threshold for 3.3 V microcontrollers in factory automation controllers.

IC Role / Device Role / Timing Role: Zener-clamped RC network defining precise 2.4 V trigger point for POR (power-on reset) generation.

Use Value: Guarantees deterministic reset assertion at 2.4–2.6 V, eliminating brown-out glitches during line-voltage sags.

DC-DC Feedback Divider

Overvoltage Clamp Protection

Use Scenario: Setting output voltage of isolated flyback converters via TL431-like feedback using discrete zener + transistor.

IC Role / Device Role / Timing Role: Primary voltage reference element in optocoupler-coupled secondary-side regulation loop.

Use Value: Delivers ±2% output regulation accuracy without integrated error amplifier, reducing BOM cost by 30%.

Use Scenario: Protecting ADC inputs from transient surges in motor drive control boards exposed to EMI.

IC Role / Device Role / Timing Role: Fast-acting shunt clamp limiting input to 2.6 V before damage threshold of 3.6 V is reached.

Use Value: Absorbs >100 mJ surge energy without degradation, extending system MTBF by 4× vs. standard TVS diodes.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N4730A (ON Semiconductor)	Zener voltage 3.9 V ±5%, P_d = 1 W, DO-41 package - higher power but incompatible voltage grade.	Requires redesign of series resistor and layout due to larger DO-41 footprint and different V_Z.	Select only when 3.9 V regulation and higher surge handling are mandatory; not a drop-in replacement.
BZX55C2V4 (Vishay)	V_Z = 2.4 V ±5%, P_d = 500 mW, DO-35 package - same voltage grade but axial-leaded, non-SMD.	Not compatible with automated SMT placement; requires manual soldering or through-hole redesign.	Choose for prototyping or low-volume builds where board space and assembly method allow axial components.

Compared with 1N4730A and BZX55C2V4, the HZS2C1TD-E offers optimal fit for SMT-based industrial power management where 2.4–2.6 V clamping, MHD package compatibility, and 400 mW dissipation meet both performance and manufacturing requirements.

Availability

HZS2C1TD-E is available at Aetrix Electronics and suitable for industrial sensor biasing, microcontroller reset circuits, and DC-DC feedback divider networks requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for HZS2C1TD-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 global semiconductor leader specializing in microcontrollers, analog, power, and timing solutions for industrial, automotive, and infrastructure markets.

The HZS Series belongs to Renesas' legacy discrete portfolio targeting cost-sensitive, high-reliability voltage regulation - engineered for stable operation in harsh environments including factory floors and outdoor control cabinets.

FAQ

What is the exact zener voltage range specified for HZS2C1TD-E?

The HZS2C1TD-E has a guaranteed zener voltage range of 2.4 V minimum to 2.6 V maximum when tested at I_Z = 5 mA and T_a = 25°C. This 200 mV window ensures consistent clamping behavior across production lots and supports designs requiring tight voltage tolerance without post-assembly trimming.

Can HZS2C1TD-E be used in place of a 2.5 V reference IC like REF02?

No - the HZS2C1TD-E is a passive Zener diode, not an active voltage reference IC. It lacks built-in temperature compensation, initial accuracy better than ±0.5%, or low-noise buffered output. While usable as a basic 2.5 V reference in non-critical applications, it cannot replace REF02 in precision instrumentation or data acquisition systems requiring ppm-level stability.

What is the maximum allowable reverse current before HZS2C1TD-E exceeds its power rating?

At 2.4 V zener voltage, the HZS2C1TD-E reaches its 400 mW power limit at approximately 166 mA (P = V × I → I = 400 mW / 2.4 V). In practice, derating to 70% (≤116 mA) is recommended for continuous operation above 70°C ambient to ensure junction temperature remains below 200°C.

Is HZS2C1TD-E RoHS-compliant and lead-free?

Yes - the HZS2C1TD-E conforms to EU RoHS Directive requirements. The MHD package uses lead-free terminations, and Renesas confirms compliance in its official product documentation (REJ03G0184-0500 Rev.5.00). No exemptions apply; the device contains no restricted substances above threshold limits.

Does HZS2C1TD-E have a specified zener voltage temperature coefficient?

Yes - while not explicitly listed for HZS2C1TD-E in isolation, the HZS Series datasheet shows −3.5 mV/°C typical for 2–3 V Zener types (Fig.2). This coefficient applies directly to HZS2C1TD-E, resulting in ~±8.4 mV drift over −40°C to +85°C - critical for designs requiring stable bias over wide temperature ranges.

HZS2C1TD-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:: -

HZS2C1TD-E FAQ

1.How can I place an order for HZS2C1TD-E through Aetrix?

Please submit a Request for Quotation (RFQ) for HZS2C1TD-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 HZS2C1TD-E reliable?

The price and inventory of HZS2C1TD-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZS2C1TD-E is usually 5 days.

3.What payment methods are accepted for HZS2C1TD-E?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZS2C1TD-E transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for HZS2C1TD-E?

HZS2C1TD-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your HZS2C1TD-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 HZS2C1TD-E?

For technical support, including HZS2C1TD-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZS2C1TD-E requirements.

6.How does Aetrix verify that HZS2C1TD-E is sourced from the original manufacturer or authorized distributors?

All HZS2C1TD-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 HZS2C1TD-E meets industry standards.

7.What is the process for return or replacement of HZS2C1TD-E?

All HZS2C1TD-E units undergo pre-shipment inspection (PSI). If there is an issue with HZS2C1TD-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 HZS2C1TD-E part is unused and in its original packaging.

Return procedure for HZS2C1TD-E:

1.Submit a request within 90 days.

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

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