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Renesas HZU5.1B2-90TRF-E
- Part No.:
- HZU5.1B2-90TRF-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZU5.1B2-90TRF-E.pdf
- Description:
- DIODE ZENER
- Quantity:
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Inventory:129,000
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Product details
Overview
HZU5.1B2-90TRF-E from Renesas Electronics is a silicon epitaxial planar Zener diode optimized for hard-knee, low-noise voltage reference applications, with nominal Zener voltage 4.8 V (min) to 5.2 V (max) at IZ = 0.5 mA, dynamic resistance 380 Ω (typ), and ultra-low noise voltage (~1/3–1/10 of standard HZU series). It operates in surface-mount URP (SC-76A) package for precision analog sensing and power rail stabilization.
For engineers reviewing the HZU5.1B2-90TRF-E datasheet, HZU5.1B2-90TRF-E pinout, HZU5.1B2-90TRF-E application, or HZU5.1B2-90TRF-E equivalent, key selection criteria include its semi-logarithmic VZ-IZ linearity from 1 nA to 1 mA, temperature coefficient of −0.03 mV/°C (typ), and suitability for low-drift reference designs requiring stable reverse-bias operation below 150 mW dissipation.
Technical Context
The HZU5.1B2-90TRF-E implements a hard-knee Zener breakdown structure with epitaxial planar junction design, enabling sharp knee characteristics and minimal voltage hysteresis. Its VZ-IZ curve remains semi-logarithmic linear across six decades (1 nA–1 mA), supporting accurate low-current referencing.
It exhibits reduced thermal drift versus legacy HZU series: temperature coefficient is approximately half (−0.03 mV/°C typ) and noise voltage is suppressed by factor of 3–10. Absolute maximum ratings specify Pd = 150 mW at Ta = 25°C, derating linearly to zero at Ta = 150°C per Fig.3.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.8 V min to 5.2 V max at IZ = 0.5 mA - defines tight tolerance band for precision reference use |
| Dynamic Resistance (ZZT) | 380 Ω typical at IZT = 0.5 mA - ensures minimal AC impedance and low output impedance under varying load |
| Reverse Current (IR) | ≤100 nA at VR = 3.0 V - enables ultra-low leakage in high-impedance bias networks |
| Temperature Coefficient (γZ) | −0.03 mV/°C typical - delivers <0.15 mV drift over 0–50°C ambient range |
| Noise Voltage | ~1/3 to 1/10 of standard HZU series - critical for low-noise instrumentation amplifier references |
| Power Dissipation (Pd) | 150 mW maximum at Ta = 25°C - sets thermal boundary for PCB layout and copper pour sizing |
| Junction Temperature (Tj) | 150°C maximum - constrains allowable thermal rise above ambient in sealed enclosures |
Pinout & Package
Package: Ultra Small Resin Package (URP), JEITA code PTSP0002ZA-A, SC-76A footprint, mass 0.004 g, dimensions A1 = 0.75–0.90 mm, A2 = 0.15–0.30 mm, b = 1.55–1.70 mm, D = 0.80 mm, E = 0.80 mm, e1 = 1.10–1.25 mm, l1 = 2.30–2.50 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode | Connected to higher potential node; reverse-biased terminal where Zener breakdown occurs |
| 2 | Anode | Connected to lower potential (typically ground or common return); completes bias path |
Key Features
| Feature | Design Value |
|---|---|
| Hard-knee Zener characteristic | Enables precise, repeatable turn-on at defined VZ without soft transition-critical for threshold detection |
| Semi-logarithmic VZ-IZ linearity | Maintains stable voltage across 1 nA–1 mA current range-supports wide dynamic range biasing |
| Ultra-low noise voltage | Reduces RMS noise contribution in sensitive analog front-ends (e.g., sensor signal chains) |
| Reduced temperature coefficient | Minimizes thermal drift in unregulated environments-enables stable reference without external compensation |
| Surface-mount URP package | 0.8 × 0.8 mm footprint with 0.45 mm pitch-fits high-density PCB layouts and automated assembly |
Applications
| High-Precision ADC Reference | Low-Drift Sensor Biasing |
|---|---|
Use Scenario: Providing stable 4.9 V reference to 16-bit SAR ADC in industrial data acquisition module. IC Role / Device Role / Timing Role: Zener diode operating in reverse-bias mode as two-terminal shunt voltage reference. Use Value: Tight 4.8–5.2 V tolerance and 380 Ω dynamic resistance ensure <±0.5 LSB reference error across temperature and supply variation. | Use Scenario: Biasing bridge-type pressure sensor in automotive cabin air quality monitor. IC Role / Device Role / Timing Role: Low-noise, low-drift voltage source for excitation of Wheatstone bridge. Use Value: −0.03 mV/°C tempco and ultra-low noise preserve sensor resolution down to 0.1% FS accuracy over −40°C to +85°C. |
| Portable Instrumentation Power Rail Clamp | Low-Power Microcontroller Reset Circuit |
Use Scenario: Clamping 5 V rail in handheld multimeter to prevent overvoltage damage during battery swap. IC Role / Device Role / Timing Role: Shunt protection device limiting rail excursion using controlled Zener conduction. Use Value: 150 mW rating and hard-knee behavior allow fast, predictable clamping without oscillation or overshoot. | Use Scenario: Generating clean reset threshold for ARM Cortex-M0+ MCU in IoT edge node. IC Role / Device Role / Timing Role: Precision voltage detector element in discrete reset circuit with RC timing. Use Value: Semi-log VZ-IZ linearity ensures consistent trip point across wide supply ramp rates (1–100 V/s). |
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 |
|---|---|---|---|
| BZX84-C4V7LT1G | Zener voltage 4.7 V ±5%, dynamic resistance 90 Ω (at 5 mA), higher noise, no hard-knee specification | Higher test current (5 mA vs. 0.5 mA) shifts operating point; less suitable for micro-power biasing | Select when cost sensitivity outweighs low-noise and low-current linearity requirements |
| MMSZ4704T1G | Zener voltage 4.7 V ±5%, dynamic resistance 130 Ω (at 1 mA), 200 mW Pd, wider tempco (−2.5 mV/°C) | Higher power rating but significantly worse thermal stability-requires thermal compensation in precision circuits | Choose only for non-critical voltage clamping where drift <±10 mV is acceptable |
Compared with BZX84-C4V7LT1G and MMSZ4704T1G, the HZU5.1B2-90TRF-E offers superior low-current linearity, lower noise, and tighter thermal drift-making it preferred for sub-1 mA reference and sensor bias applications where stability dominates cost or power constraints.
Availability
HZU5.1B2-90TRF-E is available at Aetrix Electronics and suitable for high-precision ADC reference, low-drift sensor biasing, and portable instrumentation power rail clamp applications requiring stable component supply, traceable sourcing, and long-term lifecycle support.
Supply support for HZU5.1B2-90TRF-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 manufacturer specializing in microcontrollers, analog, and power devices for industrial, automotive, and infrastructure markets.
The HZU-LL Series was designed specifically for low-noise, hard-knee Zener reference applications demanding ultra-stable voltage regulation at microamp-level currents and minimal thermal drift.
FAQ
What is the nominal Zener voltage range of the HZU5.1B2-90TRF-E?
The HZU5.1B2-90TRF-E has a specified Zener voltage range of 4.8 V minimum to 5.2 V maximum, measured at test current IZ = 0.5 mA. This tight 4.9 V ±0.2 V band supports precision voltage reference designs where ±4% tolerance is insufficient. The actual VZ of each unit falls within this window and is verified during production screening.
Does the HZU5.1B2-90TRF-E require a minimum Zener current to maintain regulation?
Yes-the HZU5.1B2-90TRF-E maintains stable Zener voltage across a wide current range from 1 nA to 1 mA due to its semi-logarithmic VZ-IZ linearity. Unlike conventional Zeners, it does not require a fixed minimum current (e.g., 5 mA) to enter regulation; operation at 100 nA still yields predictable VZ within spec, making it ideal for ultra-low-power biasing.
What is the thermal performance of the HZU5.1B2-90TRF-E in its URP package?
The HZU5.1B2-90TRF-E has a maximum junction temperature of 150°C and a power dissipation limit of 150 mW at Ta = 25°C, derating linearly to zero at 150°C (per Fig.3 in REJ03G1216-0500). Its URP package provides sufficient thermal path for ambient temperatures up to +85°C at ≤100 mW dissipation, assuming standard 1-oz copper on FR-4.
How does the noise performance of the HZU5.1B2-90TRF-E compare to standard Zener diodes?
The HZU5.1B2-90TRF-E achieves approximately 1/3 to 1/10 the noise voltage of the legacy HZU series, due to optimized epitaxial planar junction design and hard-knee structure. This reduction directly lowers RMS noise in precision analog signal chains-for example, reducing integrated noise in a 10 Hz–10 kHz bandwidth by >10 dB versus BZX84-C4V7LT1G.
Is the HZU5.1B2-90TRF-E RoHS compliant and lead-free?
Yes-the HZU5.1B2-90TRF-E is RoHS compliant and lead-free, consistent with Renesas Electronics' environmental policy and documented in their official product change notices. The "-E" suffix in the part number denotes lead-free packaging, and the URP package uses matte tin termination per JEDEC J-STD-020.
HZU5.1B2-90TRF-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:
- -
HZU5.1B2-90TRF-E FAQ
1.How can I place an order for HZU5.1B2-90TRF-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZU5.1B2-90TRF-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 HZU5.1B2-90TRF-E reliable?
The price and inventory of HZU5.1B2-90TRF-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZU5.1B2-90TRF-E is usually 5 days.
3.What payment methods are accepted for HZU5.1B2-90TRF-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZU5.1B2-90TRF-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZU5.1B2-90TRF-E?
HZU5.1B2-90TRF-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZU5.1B2-90TRF-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 HZU5.1B2-90TRF-E?
For technical support, including HZU5.1B2-90TRF-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZU5.1B2-90TRF-E requirements.
6.How does Aetrix verify that HZU5.1B2-90TRF-E is sourced from the original manufacturer or authorized distributors?
All HZU5.1B2-90TRF-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 HZU5.1B2-90TRF-E meets industry standards.
7.What is the process for return or replacement of HZU5.1B2-90TRF-E?
All HZU5.1B2-90TRF-E units undergo pre-shipment inspection (PSI). If there is an issue with HZU5.1B2-90TRF-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 HZU5.1B2-90TRF-E part is unused and in its original packaging.
Return procedure for HZU5.1B2-90TRF-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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