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

Renesas HZU9.1B1TRF-E

Name: HZU9.1B1TRF-E
Brand: Renesas
SKU: HZU9.1B1TRF-E
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: HZU9.1B1TRF-E

Manufacturer:: Renesas

Category:: Single Zener Diodes

Package:: -

Datasheet:: HZU9.1B1TRF-E.pdf

Description:: DIODE ZENER

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Product details

Overview

HZU9.1B1TRF-E from Renesas Electronics is a silicon planar Zener diode designed for voltage stabilization in low-power analog and digital circuits, featuring a nominal Zener voltage of 9.1 V (±3.3% tolerance), 200 mW power dissipation, and ultra-small URP (SC-76A) surface-mount package with cathode-anode pinout. It operates reliably across –55°C to +150°C ambient range and delivers 6.0 Ω dynamic resistance at 5 mA test current.

For engineers reviewing the HZU9.1B1TRF-E datasheet, HZU9.1B1TRF-E pinout, HZU9.1B1TRF-E application, or HZU9.1B1TRF-E equivalent, key selection considerations include its tight-grade B1 voltage tolerance (9.45–9.87 V), pulse-tested Zener characteristics, thermal derating curve per Fig.3, and compatibility with automated SMT assembly due to TRF taping (3,000 pcs/reel).

Technical Context

This Zener diode employs a silicon planar junction structure optimized for stable reverse-breakdown operation under DC or pulsed bias. Its electrical behavior is defined at 5 mA Zener test current, with reverse current limited to ≤2 µA at VR = 7.28 V and dynamic resistance measured at 5 mA.

The device's temperature coefficient is negative (–0.04 %/°C typical at 9.1 V), indicating decreasing VZ with rising junction temperature. Thermal performance follows a linear derating curve: Pd drops from 200 mW at 25°C to zero at 150°C, as shown in Fig.3.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	9.45–9.87 V at I_Z = 5 mA - defines precise regulation window for 9.1 V nominal reference
Power Dissipation (P_d)	200 mW at T_a = 25°C - sets maximum continuous DC power before thermal shutdown
Dynamic Resistance (r_d)	30 Ω max at I_Z = 5 mA - determines output impedance and load regulation sensitivity
Reverse Current (I_R)	≤2 µA at V_R = 7.28 V - ensures minimal leakage below breakdown threshold
Junction Temperature (T_j)	150°C max - constrains PCB layout for thermal relief and heatsinking requirements
Package	URP (SC-76A), 0.8 mm × 0.8 mm footprint - enables high-density placement in space-constrained designs

Pinout & Package

Ultra-small Resin Package (URP, JEITA code SC-76A) with 2-terminal surface-mount configuration. Cathode marked by dot on top surface; anode unmarked.

Pin/Terminal	Circuit Role	Design Meaning
1	Cathode	Connected to regulated output node; polarity must be observed for correct biasing
2	Anode	Connected to ground or lower-potential rail; forms return path for Zener current

Key Features

Feature	Design Value
Grade B1 voltage tolerance	±2.2% around 9.1 V (9.45–9.87 V) - enables tighter regulation than standard-grade Zeners
Pulse-tested Zener characteristics	Tested with 40 ms pulse width - ensures stability under transient overvoltage conditions
Low-profile URP package	0.8 mm × 0.8 mm × 0.45 mm height - supports miniaturized PCB layouts and fine-pitch reflow
TRF tape-and-reel packaging	3,000 pcs per reel - compatible with high-speed pick-and-place equipment

Applications

Power Supply Reference	Overvoltage Clamp
Use Scenario: Providing stable 9.1 V reference for ADC voltage dividers or op-amp bias networks in battery-powered sensors. IC Role / Device Role / Timing Role: Voltage reference element establishing precision DC operating point. Use Value: Delivers ±2.2% V_Z tolerance and 30 Ω r_d to minimize reference drift under varying load currents.	Use Scenario: Protecting microcontroller I/O pins from ESD-induced transients exceeding 7.28 V. IC Role / Device Role / Timing Role: Shunt clamping device diverting surge current to ground. Use Value: Activates at 9.45 V with <2 µA leakage below 7.28 V, minimizing standby power impact.
Signal Level Translation	Current Source Bias
Use Scenario: Shifting logic-level signals between 3.3 V and 5 V domains using resistor-Zener interface. IC Role / Device Role / Timing Role: Fixed-voltage clamp defining upper signal swing limit. Use Value: Maintains consistent clamping threshold across –55°C to +125°C operating range.	Use Scenario: Setting constant current through LED strings or sensor excitation circuits via series resistor + Zener. IC Role / Device Role / Timing Role: Stable voltage reference enabling predictable I_OUT = (V_IN – V_Z)/R. Use Value: 200 mW rating supports up to ~22 mA continuous current at 9.1 V without derating.

Power Supply Reference

Overvoltage Clamp

Use Scenario: Providing stable 9.1 V reference for ADC voltage dividers or op-amp bias networks in battery-powered sensors.

IC Role / Device Role / Timing Role: Voltage reference element establishing precision DC operating point.

Use Value: Delivers ±2.2% V_Z tolerance and 30 Ω r_d to minimize reference drift under varying load currents.

Use Scenario: Protecting microcontroller I/O pins from ESD-induced transients exceeding 7.28 V.

IC Role / Device Role / Timing Role: Shunt clamping device diverting surge current to ground.

Use Value: Activates at 9.45 V with <2 µA leakage below 7.28 V, minimizing standby power impact.

Signal Level Translation

Current Source Bias

Use Scenario: Shifting logic-level signals between 3.3 V and 5 V domains using resistor-Zener interface.

IC Role / Device Role / Timing Role: Fixed-voltage clamp defining upper signal swing limit.

Use Value: Maintains consistent clamping threshold across –55°C to +125°C operating range.

Use Scenario: Setting constant current through LED strings or sensor excitation circuits via series resistor + Zener.

IC Role / Device Role / Timing Role: Stable voltage reference enabling predictable I_OUT = (V_IN – V_Z)/R.

Use Value: 200 mW rating supports up to ~22 mA continuous current at 9.1 V without derating.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX584-C9V1	150 mW rating, ±5% tolerance (9.1 V ±0.46 V), SOD-523 package	Lower power handling and wider voltage spread; suitable only for sub-100 mW reference use	Select when board space is more constrained than voltage accuracy
MMSZ5240B	500 mW rating, ±5% tolerance, SOD-123 package; higher thermal mass	Higher power capability but larger footprint and looser tolerance than HZU9.1B1TRF-E	Select when >200 mW dissipation or improved thermal robustness is required

Compared with BZX584-C9V1 and MMSZ5240B, the HZU9.1B1TRF-E offers superior voltage accuracy (±2.2% vs. ±5%) in the smallest footprint (0.8×0.8 mm), making it optimal for high-precision, space-limited stabilization where 200 mW suffices.

Availability

HZU9.1B1TRF-E is available at Aetrix Electronics and suitable for voltage reference, overvoltage protection, and signal conditioning applications requiring stable component supply, consistent grade-B1 tolerances, and RoHS-compliant URP packaging.

Supply support for HZU9.1B1TRF-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, with headquarters in Tokyo, Japan.

The HZU Series belongs to Renesas' discrete Zener diode product line, engineered specifically for compact, high-accuracy voltage stabilization in consumer, industrial, and computing applications.

FAQ

What is the exact Zener voltage range for HZU9.1B1TRF-E at 5 mA test current?

The HZU9.1B1TRF-E has a guaranteed Zener voltage range of 9.45 V to 9.87 V when tested at I_Z = 5 mA and T_a = 25°C. This corresponds to the B1 grade specification in the Renesas datasheet R07DS0423EJ1000 Rev.10.00, Page 3. The value reflects a ±2.2% tolerance around the nominal 9.1 V rating, tighter than standard-grade variants.

Does HZU9.1B1TRF-E support lead-free reflow soldering?

Yes, the HZU9.1B1TRF-E is RoHS-compliant and qualified for lead-free reflow soldering per J-STD-020. Its URP (SC-76A) package uses matte tin plating and withstands peak temperatures up to 260°C for 10 seconds. The device's thermal profile aligns with standard Pb-free reflow cycles, and no special pre-bake is required prior to assembly.

What is the maximum reverse voltage HZU9.1B1TRF-E can block before breakdown?

The HZU9.1B1TRF-E guarantees reverse current ≤2 µA at V_R = 7.28 V, meaning it reliably blocks voltages up to at least 7.28 V in normal operation. Breakdown begins within the specified 9.45–9.87 V range at 5 mA, so 7.28 V represents a safe non-conducting margin-critical for clamping and reference applications where leakage must remain negligible.

How does the dynamic resistance of HZU9.1B1TRF-E affect voltage regulation stability?

The HZU9.1B1TRF-E exhibits a maximum dynamic resistance of 30 Ω at I_Z = 5 mA. This value directly impacts regulation stability: for every 1 mA change in Zener current, output voltage shifts by up to 30 mV. Lower r_d improves load regulation and reduces sensitivity to input ripple, making HZU9.1B1TRF-E suitable for moderate-precision references where stability under varying current is essential.

Is HZU9.1B1TRF-E rated for automotive applications?

No, the HZU9.1B1TRF-E is classified as a "Standard" quality grade device per Renesas documentation, intended for computers, office equipment, audio/video gear, and industrial robots-not automotive or safety-critical systems. It lacks AEC-Q200 qualification, extended temperature validation beyond –55°C to +150°C, or enhanced reliability screening required for automotive use.

HZU9.1B1TRF-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:: -

HZU9.1B1TRF-E FAQ

1.How can I place an order for HZU9.1B1TRF-E through Aetrix?

Please submit a Request for Quotation (RFQ) for HZU9.1B1TRF-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 HZU9.1B1TRF-E reliable?

The price and inventory of HZU9.1B1TRF-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZU9.1B1TRF-E is usually 5 days.

3.What payment methods are accepted for HZU9.1B1TRF-E?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZU9.1B1TRF-E transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for HZU9.1B1TRF-E?

HZU9.1B1TRF-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your HZU9.1B1TRF-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 HZU9.1B1TRF-E?

For technical support, including HZU9.1B1TRF-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZU9.1B1TRF-E requirements.

6.How does Aetrix verify that HZU9.1B1TRF-E is sourced from the original manufacturer or authorized distributors?

All HZU9.1B1TRF-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 HZU9.1B1TRF-E meets industry standards.

7.What is the process for return or replacement of HZU9.1B1TRF-E?

All HZU9.1B1TRF-E units undergo pre-shipment inspection (PSI). If there is an issue with HZU9.1B1TRF-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 HZU9.1B1TRF-E part is unused and in its original packaging.

Return procedure for HZU9.1B1TRF-E:

1.Submit a request within 90 days.

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

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