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

Renesas HZ9.1CPTN-E

Name: HZ9.1CPTN-E
Brand: Renesas
SKU: HZ9.1CPTN-E
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: HZ9.1CPTN-E

Manufacturer:: Renesas

Category:: Single Zener Diodes

Package:: -

Datasheet:: HZ9.1CPTN-E.pdf

Description:: DIODE ZENER

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Inventory:415,000

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Product details

Overview

HZ9.1CPTN-E from Renesas is a silicon planar Zener diode optimized for low-noise voltage regulation, featuring a nominal zener voltage of 9.1 V, dynamic resistance of 60 Ω at 6.0 mA, maximum power dissipation of 400 mW, and junction temperature rating of 175°C - used in precision reference and stabilized power supply circuits.

For engineers reviewing the HZ9.1CPTN-E datasheet, HZ9.1CPTN-E pinout, HZ9.1CPTN-E application, or HZ9.1CPTN-E equivalent, key selection criteria include zener voltage tolerance (±0.2 V), low noise performance versus standard HZ series, DO-35 package compatibility, and thermal derating behavior above 25°C ambient.

Technical Context

The HZ9.1CPTN-E operates as a two-terminal voltage reference device with DC-tested zener characteristics, designed for stable biasing and regulation in analog signal chains where low noise and tight voltage control are critical. Its zener voltage is specified at 6.0 mA test current with ±0.2 V min/max spread (8.9 V to 9.3 V).

It exhibits a zener voltage temperature coefficient of approximately −0.04 %/°C (−3.6 mV/°C) near 9.1 V, confirming negative TC behavior typical of medium-voltage Zeners, and maintains low leakage (<1 μA at VR = 7.3 V) and low dynamic impedance (60 Ω) under nominal bias conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	8.9 V to 9.3 V at I_Z = 6.0 mA - defines stable regulation point with ±0.2 V tolerance for precision references.
Dynamic Resistance (r_d)	60 Ω max at I_Z = 6.0 mA - ensures minimal output voltage variation under load current changes.
Power Dissipation (P_d)	400 mW max at T_a = 25°C - sets thermal design limit; requires derating above 25°C per Fig.3.
Reverse Current (I_R)	≤1 μA at V_R = 7.3 V - guarantees low standby leakage in high-impedance bias networks.
Junction Temperature (T_j)	−55°C to +175°C - supports operation in industrial and automotive under-hood environments.
Noise Level	≈1/3–1/10 of standard HZ series - enables use in low-noise op-amp references and sensor excitation circuits.

Pinout & Package

Package: DO-35 (JEITA code GRZZ0002ZB-A), glass axial leaded package with orange body and navy-blue cathode band; mass ≈0.13 g; dimensions per SC-40 outline (L = 26.0 mm, φD = 2.0 mm, φb = 0.5 mm).

Pin/Terminal	Circuit Role	Design Meaning
1 (Cathode)	Zener anode connection point	Connected to higher-potential node; reverse-biased terminal for regulation.
2 (Anode)	Zener cathode connection point	Connected to lower-potential node (typically ground or return); defines polarity for breakdown conduction.

Key Features

Feature	Design Value
Low-noise Zener structure	Diode noise reduced to 10–33% of standard HZ series - improves SNR in precision analog front-ends.
Tight zener voltage tolerance	±0.2 V at 9.1 V nominal - enables accurate voltage referencing without post-calibration trimming.
Low dynamic impedance	60 Ω max at 6 mA - minimizes regulation error under varying load currents in feedback loops.
High thermal stability	175°C max junction temperature - allows operation in compact, thermally constrained PCB layouts.

Applications

Instrumentation Reference	Low-Noise Sensor Bias
Use Scenario: Precision multimeter internal voltage reference requiring long-term stability and low drift. IC Role / Device Role / Timing Role: Two-terminal passive voltage reference providing fixed 9.1 V reference for ADC/DAC calibration. Use Value: Tight 8.9–9.3 V tolerance and low TC (−0.04 %/°C) reduce system-level calibration frequency and improve measurement repeatability.	Use Scenario: Biasing bridge-based strain gauges or RTDs in data acquisition modules. IC Role / Device Role / Timing Role: Low-noise DC excitation source replacing higher-noise alternatives like TL431 shunt regulators. Use Value: 1/3–1/10 noise level vs. standard HZ series directly lowers input-referred noise floor in µV-range measurements.
Stabilized Power Supply	Analog Circuit Protection
Use Scenario: Local regulation for op-amp rails in battery-powered portable instrumentation. IC Role / Device Role / Timing Role: Shunt regulator maintaining stable 9.1 V rail despite input variations from aging batteries. Use Value: 400 mW power rating and 60 Ω r_d enable robust regulation with <10 mV line/load regulation error over 1–10 mA load range.	Use Scenario: Overvoltage clamp protecting ADC inputs against transient surges in industrial PLC analog modules. IC Role / Device Role / Timing Role: Fast-acting voltage limiter clamping signals to ≤9.3 V before reaching sensitive input stages. Use Value: Low leakage (<1 μA) prevents signal loading; fast zener turn-on limits overshoot without adding RC delay.

Instrumentation Reference

Low-Noise Sensor Bias

Use Scenario: Precision multimeter internal voltage reference requiring long-term stability and low drift.

IC Role / Device Role / Timing Role: Two-terminal passive voltage reference providing fixed 9.1 V reference for ADC/DAC calibration.

Use Value: Tight 8.9–9.3 V tolerance and low TC (−0.04 %/°C) reduce system-level calibration frequency and improve measurement repeatability.

Use Scenario: Biasing bridge-based strain gauges or RTDs in data acquisition modules.

IC Role / Device Role / Timing Role: Low-noise DC excitation source replacing higher-noise alternatives like TL431 shunt regulators.

Use Value: 1/3–1/10 noise level vs. standard HZ series directly lowers input-referred noise floor in µV-range measurements.

Stabilized Power Supply

Analog Circuit Protection

Use Scenario: Local regulation for op-amp rails in battery-powered portable instrumentation.

IC Role / Device Role / Timing Role: Shunt regulator maintaining stable 9.1 V rail despite input variations from aging batteries.

Use Value: 400 mW power rating and 60 Ω r_d enable robust regulation with <10 mV line/load regulation error over 1–10 mA load range.

Use Scenario: Overvoltage clamp protecting ADC inputs against transient surges in industrial PLC analog modules.

IC Role / Device Role / Timing Role: Fast-acting voltage limiter clamping signals to ≤9.3 V before reaching sensitive input stages.

Use Value: Low leakage (<1 μA) prevents signal loading; fast zener turn-on limits overshoot without adding RC delay.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N4739A	Zener voltage 9.1 V ±5%, r_d = 8 Ω max, P_d = 1 W, DO-41 package	Higher power and lower r_d, but 5× higher noise than HZ9.1CPTN-E	Select when higher power handling is needed and noise is secondary.
BZX55C9V1	Zener voltage 9.1 V ±5%, r_d = 10 Ω max, P_d = 500 mW, DO-35 package	Same package, but higher noise and wider voltage tolerance; no low-noise specification	Select when cost sensitivity outweighs noise and tolerance requirements.

Compared with 1N4739A and BZX55C9V1, the HZ9.1CPTN-E delivers superior noise performance and tighter voltage tolerance in the same DO-35 footprint, making it preferred for metrology-grade references - though its 400 mW rating requires careful thermal management in high-current shunt configurations.

Availability

HZ9.1CPTN-E is available at Aetrix Electronics and suitable for precision instrumentation, low-noise sensor interfaces, and stabilized power supply designs requiring stable component supply with traceable sourcing and lifecycle continuity.

Supply support for HZ9.1CPTN-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 is a global semiconductor manufacturer specializing in microcontrollers, analog, and power devices for industrial, automotive, and infrastructure applications.

The HZ-L Series was developed specifically for low-noise, high-stability voltage reference applications in test equipment and precision analog systems - emphasizing noise reduction, tight voltage tolerance, and thermal reliability over general-purpose Zener performance.

FAQ

What is the exact zener voltage range for HZ9.1CPTN-E?

The HZ9.1CPTN-E has a guaranteed zener voltage range of 8.9 V to 9.3 V when tested at I_Z = 6.0 mA and T_a = 25°C. This ±0.2 V tolerance is tighter than standard Zener diodes and reflects Renesas' focus on precision reference applications. The HZ9.1CPTN-E achieves this via process-controlled doping and low-noise planar structure, not post-screening.

Is HZ9.1CPTN-E compatible with DO-35 socket footprints?

Yes, the HZ9.1CPTN-E uses the standard DO-35 package (JEITA code GRZZ0002ZB-A) with 2.0 mm body diameter and 26.0 mm overall length, matching mechanical dimensions of industry-standard DO-35 sockets and wave-solder stencils. Its orange body and navy-blue cathode band also conform to JEDEC visual identification conventions for easy assembly verification.

How does the noise performance of HZ9.1CPTN-E compare to generic Zener diodes?

The HZ9.1CPTN-E delivers approximately 1/3 to 1/10 the noise level of standard HZ-series Zeners due to its optimized silicon planar construction and low-leakage junction design. This is confirmed in Renesas' characterization data (REJ03G0182-0300), making the HZ9.1CPTN-E suitable for applications where noise directly impacts measurement resolution - such as 24-bit sigma-delta ADC references.

What is the maximum reverse current specification for HZ9.1CPTN-E?

The HZ9.1CPTN-E specifies a maximum reverse current (I_R) of 1 μA at V_R = 7.3 V and T_a = 25°C. This low leakage supports high-impedance bias networks and minimizes error in precision current-source applications. The value is measured under DC conditions and remains stable across the full storage temperature range (−55°C to +175°C).

Does HZ9.1CPTN-E require derating above 25°C ambient temperature?

Yes, the HZ9.1CPTN-E must be derated linearly above 25°C ambient per Figure 3 in REJ03G0182-0300: power dissipation decreases by ~3.3 mW/°C beyond 25°C, reaching zero at ~167°C. At 70°C ambient, allowable P_d drops to ~267 mW. This thermal profile is critical for PCB layout - ensure adequate copper area and airflow around the DO-35 body when operating near rated power.

HZ9.1CPTN-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:: -

HZ9.1CPTN-E FAQ

1.How can I place an order for HZ9.1CPTN-E through Aetrix?

Please submit a Request for Quotation (RFQ) for HZ9.1CPTN-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 HZ9.1CPTN-E reliable?

The price and inventory of HZ9.1CPTN-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZ9.1CPTN-E is usually 5 days.

3.What payment methods are accepted for HZ9.1CPTN-E?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZ9.1CPTN-E transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for HZ9.1CPTN-E?

HZ9.1CPTN-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your HZ9.1CPTN-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 HZ9.1CPTN-E?

For technical support, including HZ9.1CPTN-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZ9.1CPTN-E requirements.

6.How does Aetrix verify that HZ9.1CPTN-E is sourced from the original manufacturer or authorized distributors?

All HZ9.1CPTN-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 HZ9.1CPTN-E meets industry standards.

7.What is the process for return or replacement of HZ9.1CPTN-E?

All HZ9.1CPTN-E units undergo pre-shipment inspection (PSI). If there is an issue with HZ9.1CPTN-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 HZ9.1CPTN-E part is unused and in its original packaging.

Return procedure for HZ9.1CPTN-E:

1.Submit a request within 90 days.

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

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