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Renesas HZ4.3CP-E
- Part No.:
- HZ4.3CP-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZ4.3CP-E.pdf
- Description:
- DIODE ZENER 1W 2-PIN DO-41
- Quantity:
- Payment:
- Shipping:
Inventory:7,500
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Product details
Overview
HZ4.3CP-E from Renesas is a silicon planar Zener diode engineered for low-noise voltage regulation in precision analog circuits, featuring a nominal zener voltage of 4.3 V ±5%, 400 mW power dissipation, and dynamic resistance of 150 Ω at 0.5 mA test current - deployed in reference voltage generation for ADCs, sensor signal conditioning, and low-drift power supply feedback loops.
For engineers reviewing the HZ4.3CP-E datasheet, HZ4.3CP-E pinout, HZ4.3CP-E application, or HZ4.3CP-E equivalent, key selection criteria include verified low-noise performance (1/3–1/10 lower than standard HZ series), tight zener voltage tolerance, DO-35 package thermal limits, and compatibility with DC-biased low-current stabilization circuits.
Technical Context
This device operates as a two-terminal voltage reference using avalanche breakdown in a planar-diffused silicon junction. Its low noise stems from optimized doping profile and passivation, enabling stable DC regulation without AC coupling requirements.
It exhibits a negative temperature coefficient near 4.3 V (≈−0.07 %/°C), requires no external biasing circuitry, and maintains specified zener impedance only under DC test conditions per REJ03G0182-0300 Rev.3.00.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.3 V ±5% at IZ = 0.5 mA - defines precise DC reference level for feedback or bias networks |
| Power Dissipation (Pd) | 400 mW maximum at Ta = 25°C - sets upper limit for continuous DC power handling in PCB-mounted operation |
| Dynamic Resistance (rd) | 150 Ω max at IZ = 0.5 mA - determines output impedance and load regulation sensitivity in shunt regulator topologies |
| Reverse Leakage Current (IR) | 1 μA max at VR = 1 V - ensures minimal error current in high-impedance reference nodes |
| Junction Temperature (Tj) | 175°C maximum - constrains thermal design margin when operating near Pd limit on FR-4 PCB |
| Package | DO-35 (JEITA GRZZ0002ZB-A) - axial-leaded glass body with orange body color and navy blue cathode band |
Pinout & Package
DO-35 glass axial package: hermetically sealed, 2.0 mm diameter body, 26.0 mm length, 0.5 mm lead diameter, 4.2 mm lead spacing (E), mass ≈0.13 g. Cathode identified by navy blue band; anode is unmarked lead.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (banded end) | Cathode | Connected to regulated output node; reverse-biased terminal where zener breakdown occurs |
| 2 (unbanded end) | Anode | Connected to circuit ground or lower potential; completes current path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise Zener operation | Diode noise level ≈1/3–1/10 that of standard HZ series - critical for audio preamps and precision instrumentation front-ends |
| Stable low-current regulation | Specified performance at IZ = 0.5 mA - enables use in ultra-low-power reference designs without minimum current boosters |
| Low zener impedance | rd ≤ 150 Ω - improves line/load regulation in shunt configurations driving <10 kΩ loads |
| Wide ambient temperature range | Tstg = −55°C to +175°C - supports deployment in automotive engine control and industrial sensor modules |
Applications
| High-Precision ADC Reference | Low-Noise Sensor Biasing |
|---|---|
Use Scenario: Providing stable 4.3 V reference for 16-bit SAR ADCs in data acquisition systems where supply ripple and thermal drift must be minimized. IC Role / Device Role / Timing Role: Two-terminal shunt voltage reference establishing exact input scaling voltage for analog front-end. Use Value: Enables <±0.5 LSB integral nonlinearity by maintaining <10 ppm/°C drift and sub-μV RMS noise floor over 0–70°C. |
Use Scenario: Biasing bridge-type pressure sensors in medical infusion pumps requiring stable excitation with minimal self-heating error. IC Role / Device Role / Timing Role: Low-current zener source delivering regulated 4.3 V to sensor Wheatstone bridge. Use Value: Limits bridge current to <1 mA while holding output offset drift <20 μV/°C - directly improving pressure measurement resolution. |
| DC-DC Feedback Node | Low-Power Microcontroller Reset Circuit |
Use Scenario: Setting feedback threshold in isolated flyback converters where optocoupler CTR variation demands tight reference tolerance. IC Role / Device Role / Timing Role: Precision shunt element in TL431-like feedback divider network. Use Value: Achieves ±1% output voltage accuracy across line/load/temperature without trimming, reducing BOM count vs. adjustable references. |
Use Scenario: Generating clean reset threshold for ultra-low-power MCUs in battery-operated IoT edge nodes. IC Role / Device Role / Timing Role: Zener-based voltage detector triggering POR circuit at precisely 4.3 V. Use Value: Eliminates need for dedicated supervisor IC; enables reset assertion within 10 μs of VCC crossing 4.3 V ±0.2 V. |
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 |
|---|---|---|---|
| 1N4731A (ON Semiconductor) | Zener voltage 4.3 V ±5%, Pd = 1 W, rd = 9 Ω at 53 mA - higher power but requires ≥53 mA for spec compliance | Designed for higher-current shunt regulation; unsuitable for <1 mA biasing without derating | Select only if circuit can sustain ≥50 mA zener current and requires lower impedance |
| BZX55-C4V3 (Vishay) | Zener voltage 4.3 V ±5%, Pd = 500 mW, rd = 90 Ω at 5 mA - tighter impedance spec but tested at higher current | Optimized for 5 mA operation; exhibits higher dynamic impedance below 2 mA than HZ4.3CP-E | Prefer when system bias current is stable at 3–10 mA and thermal margin exceeds 200 mW |
Compared with 1N4731A and BZX55-C4V3, the HZ4.3CP-E delivers superior low-current stability (0.5 mA test point), lower noise, and guaranteed performance at microampere-level bias - making it uniquely suited for battery-powered precision analog stages where current budget and spectral purity are constrained.
Availability
HZ4.3CP-E is available at Aetrix Electronics and suitable for high-precision ADC reference, low-noise sensor biasing, and DC-DC feedback applications requiring stable component supply with traceable Renesas manufacturing lineage.
Supply support for HZ4.3CP-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 leader specializing in microcontrollers, analog power, and trusted embedded solutions for automotive, industrial, and infrastructure markets.
The HZ-L Series, including HZ4.3CP-E, was developed specifically for low-noise, low-current voltage reference applications in precision analog signal chains - emphasizing noise reduction, tight tolerance, and stable DC regulation over wide temperature ranges.
FAQ
What is the zener voltage tolerance and test condition for HZ4.3CP-E?
The HZ4.3CP-E has a zener voltage of 4.3 V with ±5% tolerance, measured at a test current of 0.5 mA under DC conditions per REJ03G0182-0300 Rev.3.00. This tolerance ensures predictable reference accuracy in low-bias circuits without requiring external trimming, and the DC test method confirms suitability for static regulation rather than pulsed or AC-coupled use cases.
Does HZ4.3CP-E support operation at elevated ambient temperatures?
Yes, HZ4.3CP-E is rated for storage from −55°C to +175°C and junction temperature up to 175°C. Its DO-35 package allows direct mounting on FR-4 PCBs with appropriate copper pour; however, power derating is required above 25°C ambient - e.g., maximum dissipation drops to ~200 mW at 70°C ambient per Fig.3 in the datasheet.
How does the noise performance of HZ4.3CP-E compare to standard Zener diodes?
HZ4.3CP-E achieves approximately 1/3 to 1/10 the noise level of conventional HZ-series Zeners due to proprietary planar diffusion and passivation. This low-noise characteristic is validated under DC bias and makes HZ4.3CP-E especially valuable in audio preamplifiers, precision DAC buffers, and sensor signal chains where broadband noise directly impacts SNR.
Can HZ4.3CP-E be used in place of a TL431 in feedback circuits?
No - HZ4.3CP-E is a passive two-terminal Zener diode, whereas TL431 is an active three-terminal shunt regulator with internal reference and amplifier. HZ4.3CP-E may serve as the voltage-setting element *within* a TL431 feedback divider, but cannot replace TL431's functionality. Its 150 Ω dynamic resistance also limits loop stability in closed-loop compensation schemes.
What is the cathode identification method for HZ4.3CP-E?
HZ4.3CP-E uses a navy blue cathode band on the DO-35 glass body, consistent with Renesas HZ-L Series marking. The banded lead is the cathode; the opposite (unbanded) lead is the anode. Body color is orange - a visual identifier distinguishing it from other Zener families and confirming authenticity per JEITA package code GRZZ0002ZB-A.
HZ4.3CP-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:
- -
HZ4.3CP-E FAQ
1.How can I place an order for HZ4.3CP-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZ4.3CP-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 HZ4.3CP-E reliable?
The price and inventory of HZ4.3CP-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZ4.3CP-E is usually 5 days.
3.What payment methods are accepted for HZ4.3CP-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZ4.3CP-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZ4.3CP-E?
HZ4.3CP-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZ4.3CP-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 HZ4.3CP-E?
For technical support, including HZ4.3CP-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZ4.3CP-E requirements.
6.How does Aetrix verify that HZ4.3CP-E is sourced from the original manufacturer or authorized distributors?
All HZ4.3CP-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 HZ4.3CP-E meets industry standards.
7.What is the process for return or replacement of HZ4.3CP-E?
All HZ4.3CP-E units undergo pre-shipment inspection (PSI). If there is an issue with HZ4.3CP-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 HZ4.3CP-E part is unused and in its original packaging.
Return procedure for HZ4.3CP-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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