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

Renesas HZS27-1TD-E

Name: HZS27-1TD-E
Brand: Renesas
SKU: HZS27-1TD-E
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: HZS27-1TD-E

Manufacturer:: Renesas

Category:: Single Zener Diodes

Package:: -

Datasheet:: HZS27-1TD-E.pdf

Description:: DIODE ZENER 0.4W

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Inventory:18,928

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Product details

Overview

HZS27-1TD-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 27.2–28.6 V at 2 mA test current, 80 Ω dynamic resistance, and 400 mW maximum power dissipation in MHD package. It operates across −55°C to +175°C storage range and supports high-speed automatic insertion on 5 mm-pitch PCBs.

For engineers reviewing the HZS27-1TD-E datasheet, HZS27-1TD-E pinout, HZS27-1TD-E application, or HZS27-1TD-E equivalent, this device serves as a stable reference or clamp in analog sensing front-ends, industrial control supply rails, and low-current bias networks where tight voltage tolerance and low temperature coefficient are required.

Technical Context

The HZS27-1TD-E employs a silicon planar junction structure optimized for low leakage (<25 µA at 0.5 V below V_Z) and stable reverse breakdown behavior under DC conditions. Its zener voltage is specified at I_Z = 2 mA, with a typical temperature coefficient of −0.06 %/°C near 27 V - indicating negative drift with rising temperature.

It is rated for junction temperatures up to 200°C and exhibits graded zener voltage tolerances (±0.4 V) across its A/B/C grade variants. The device is not intended for surge suppression or transient clamping but for steady-state regulation where thermal stability and repeatable DC characteristics are critical.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	27.2–28.6 V at I_Z = 2 mA - defines precise DC regulation point for feedback or reference circuits.
Dynamic Resistance (r_d)	80 Ω max at I_Z = 2 mA - determines output impedance and load regulation sensitivity in shunt regulator designs.
Power Dissipation (P_d)	400 mW max at T_a = 25°C - sets upper limit for continuous DC power handling before thermal derating applies.
Reverse Leakage (I_R)	25 µA max at V_R = 25.2 V - ensures minimal error current in high-impedance reference paths.
Junction Temperature (T_j)	200°C max - enables operation in high-ambient industrial environments when properly heatsinked or mounted.
Package	MHD (JEITA GRZZ0002ZC-A) - axial leaded, 2.0 mm diameter, 26 mm body length; compatible with 5 mm-pitch auto-insertion.

Pinout & Package

Package: MHD - axial-leaded, glass-passivated silicon planar Zener diode with cathode band marking. Dimensions: φD = 2.0 mm (nom), L = 26.0 mm (min), mass ≈ 0.084 g. Designed for through-hole mounting on standard FR-phenolic PCBs.

Pin/Terminal	Circuit Role	Design Meaning
1 (Cathode)	Zener breakdown terminal	Connected to higher potential node; reverse-biased operation requires positive voltage applied here relative to anode.
2 (Anode)	Reference/ground terminal	Typically tied to circuit ground or lowest potential node; completes current path during regulation.

Key Features

Feature	Design Value
Low zener impedance	80 Ω max ensures minimal output voltage shift under varying load currents in shunt configurations.
Wide V_Z spectrum	27.2–28.6 V range supports precise matching to 24 V system rails with margin for aging and temperature drift.
High-temperature capability	200°C T_j rating allows use in engine-control modules or industrial enclosures without derating at 100°C ambient.
Automated assembly compatibility	5 mm pitch and MHD mechanical form enable direct integration into high-volume wave-solder or selective solder processes.

Applications

Industrial Sensor Signal Conditioning	Programmable Logic Controller (PLC) Power Rail Clamp
Use Scenario: Stabilizing reference voltage for 4–20 mA transmitter analog front-end ICs operating in harsh factory environments. IC Role / Device Role / Timing Role: Zener diode provides fixed 27.5 V reference to op-amp bias network and ADC reference divider. Use Value: Maintains ±0.5% regulation over −40°C to +85°C ambient due to predictable −0.06%/°C tempco and low r_d.	Use Scenario: Clamping auxiliary 24 V DC supply rail against overvoltage transients in modular PLC backplanes. IC Role / Device Role / Timing Role: Shunt limiter absorbs brief overvoltage spikes while protecting downstream DC-DC controllers and FPGA I/O banks. Use Value: 400 mW P_d and 200°C T_j allow sustained clamping without thermal runaway during repeated 30 V surges.
Medical Diagnostic Equipment Bias Supply	Test & Measurement Instrument Reference
Use Scenario: Generating stable bias for photodiode amplifier stages in portable ultrasound probe signal chains. IC Role / Device Role / Timing Role: Low-leakage (25 µA) Zener establishes clean 27.5 V bias for transimpedance amplifier feedback network. Use Value: Sub-µA leakage prevents input offset errors; MHD package avoids parasitic capacitance that would degrade high-frequency response.	Use Scenario: Providing calibration reference voltage for handheld multimeter analog-to-digital conversion subsystems. IC Role / Device Role / Timing Role: Precision shunt reference used in internal 28 V reference ladder for autoranging and auto-zero functions. Use Value: Tight 27.2–28.6 V tolerance and low 80 Ω r_d ensure <0.1% measurement accuracy across battery-life discharge cycles.

Industrial Sensor Signal Conditioning

Programmable Logic Controller (PLC) Power Rail Clamp

Use Scenario: Stabilizing reference voltage for 4–20 mA transmitter analog front-end ICs operating in harsh factory environments.

IC Role / Device Role / Timing Role: Zener diode provides fixed 27.5 V reference to op-amp bias network and ADC reference divider.

Use Value: Maintains ±0.5% regulation over −40°C to +85°C ambient due to predictable −0.06%/°C tempco and low r_d.

Use Scenario: Clamping auxiliary 24 V DC supply rail against overvoltage transients in modular PLC backplanes.

IC Role / Device Role / Timing Role: Shunt limiter absorbs brief overvoltage spikes while protecting downstream DC-DC controllers and FPGA I/O banks.

Use Value: 400 mW P_d and 200°C T_j allow sustained clamping without thermal runaway during repeated 30 V surges.

Medical Diagnostic Equipment Bias Supply

Test & Measurement Instrument Reference

Use Scenario: Generating stable bias for photodiode amplifier stages in portable ultrasound probe signal chains.

IC Role / Device Role / Timing Role: Low-leakage (25 µA) Zener establishes clean 27.5 V bias for transimpedance amplifier feedback network.

Use Value: Sub-µA leakage prevents input offset errors; MHD package avoids parasitic capacitance that would degrade high-frequency response.

Use Scenario: Providing calibration reference voltage for handheld multimeter analog-to-digital conversion subsystems.

IC Role / Device Role / Timing Role: Precision shunt reference used in internal 28 V reference ladder for autoranging and auto-zero functions.

Use Value: Tight 27.2–28.6 V tolerance and low 80 Ω r_d ensure <0.1% measurement accuracy across battery-life discharge cycles.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N4748A (ON Semiconductor)	V_Z = 27 V ±5%, r_d = 100 Ω, P_d = 1 W, DO-41 package	Higher power and looser tolerance; larger footprint and higher thermal mass	Select when >400 mW surge energy absorption is needed and board space permits DO-41.
BZX55-C27 (Vishay)	V_Z = 27 V ±5%, r_d = 90 Ω, P_d = 500 mW, DO-35 package	Slightly higher power, same tolerance, smaller DO-35 body (1.8 mm Ø)	Choose for space-constrained layouts where 0.2 mm diameter reduction enables tighter trace routing.

Compared with 1N4748A and BZX55-C27, the HZS27-1TD-E offers tighter V_Z tolerance (±0.7 V vs. ±1.35 V), lower leakage, and MHD package geometry optimized for automated insertion - making it preferable for high-yield, thermally stable, low-drift industrial power monitoring designs.

Availability

HZS27-1TD-E is available at Aetrix Electronics and suitable for industrial sensor conditioning, PLC power rail protection, and medical diagnostic equipment requiring stable component supply with consistent parametric performance across production lots.

Supply support for HZS27-1TD-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 automotive SoCs, with global R&D and manufacturing infrastructure.

The HZS Series was developed by Renesas as a family of precision silicon planar Zener diodes targeting stable DC voltage reference and clamping in industrial, office, and communications equipment - emphasizing low leakage, tight V_Z grading, and automated assembly readiness.

FAQ

What is the exact zener voltage range for HZS27-1TD-E?

The HZS27-1TD-E has a guaranteed zener voltage range of 27.2 V to 28.6 V when tested at I_Z = 2 mA and T_a = 25°C. This corresponds to the "-3" grade variant within the HZS27 family, as confirmed in Renesas document REJ03G0184-0500 Rev.5.00. The device achieves this specification using silicon planar junction technology with controlled diffusion profiles.

Is HZS27-1TD-E suitable for surface-mount applications?

No, the HZS27-1TD-E uses the MHD axial-leaded package (JEITA GRZZ0002ZC-A), which is designed exclusively for through-hole mounting. It is not a surface-mount device. Its 26 mm body length and 2.0 mm diameter require plated-through holes and wave or selective soldering - not reflow. For SMT alternatives, consider Renesas' HZ3 series in SOD-123 or similar.

What is the maximum reverse leakage current for HZS27-1TD-E?

The maximum reverse leakage current for HZS27-1TD-E is 25 µA at V_R = 25.2 V (0.5 V below minimum V_Z), per the Electrical Characteristics table on page 4 of REJ03G0184-0500. This low leakage supports high-impedance reference applications such as precision op-amp biasing and ADC voltage dividers where error current must be minimized.

Does HZS27-1TD-E have a specified temperature coefficient?

Yes - the HZS27-1TD-E exhibits a typical zener voltage temperature coefficient (γ_Z) of −0.06 %/°C, as shown in Figure 2 of the datasheet. This negative coefficient means its V_Z decreases by approximately 16.5 mV/°C near 27.5 V. The value is derived from characterization across the full HZS series and applies directly to the HZS27-1TD-E variant.

Can HZS27-1TD-E be used in automotive applications?

No - the HZS27-1TD-E is classified as a "Standard" quality grade device per Renesas' quality grading system (Section 7 of the notice), and is explicitly rated for computers, office equipment, communications gear, and industrial robots - not transportation or safety-critical systems. Automotive use requires "High Quality" grade parts with AEC-Q200 qualification, which HZS27-1TD-E does not possess.

HZS27-1TD-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:: -

HZS27-1TD-E FAQ

1.How can I place an order for HZS27-1TD-E through Aetrix?

Please submit a Request for Quotation (RFQ) for HZS27-1TD-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 HZS27-1TD-E reliable?

The price and inventory of HZS27-1TD-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZS27-1TD-E is usually 5 days.

3.What payment methods are accepted for HZS27-1TD-E?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZS27-1TD-E transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for HZS27-1TD-E?

HZS27-1TD-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your HZS27-1TD-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 HZS27-1TD-E?

For technical support, including HZS27-1TD-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZS27-1TD-E requirements.

6.How does Aetrix verify that HZS27-1TD-E is sourced from the original manufacturer or authorized distributors?

All HZS27-1TD-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 HZS27-1TD-E meets industry standards.

7.What is the process for return or replacement of HZS27-1TD-E?

All HZS27-1TD-E units undergo pre-shipment inspection (PSI). If there is an issue with HZS27-1TD-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 HZS27-1TD-E part is unused and in its original packaging.

Return procedure for HZS27-1TD-E:

1.Submit a request within 90 days.

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

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