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Renesas HZ4.3CP90TK
- Part No.:
- HZ4.3CP90TK
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZ4.3CP90TK.pdf
- Description:
- DIODE ZENER
- Quantity:
- Payment:
- Shipping:
Inventory:15,000
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Product details
Overview
HZ4.3CP90TK 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, 400 mW power dissipation, <1 μA reverse leakage at 1 V, and low dynamic impedance of ≤60 Ω at 5 mA - deployed in reference voltage generators and sensor signal conditioning stages.
For engineers reviewing the HZ4.3CP90TK datasheet, HZ4.3CP90TK pinout, HZ4.3CP90TK application, or HZ4.3CP90TK equivalent, key selection criteria include zener voltage tolerance (±5%), temperature coefficient (−0.05 %/°C), noise performance (1/3–1/10 lower than standard HZ series), and DO-35 package compatibility with through-hole PCB layouts.
Technical Context
The HZ4.3CP90TK operates as a two-terminal shunt regulator with DC-tested zener breakdown at 4.3 V ±5% under 5 mA test current. Its low-noise design targets applications requiring stable biasing where thermal drift and broadband noise must be minimized.
It exhibits a negative temperature coefficient of −0.05 %/°C (≈−2.15 mV/°C) and maintains zener impedance ≤60 Ω up to 5 mA, enabling high-accuracy voltage references in low-power instrumentation front-ends and ADC/DAC reference buffers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.3 V ±5% at IZ = 5 mA - defines precise regulation point for low-drift references |
| Power Dissipation (Pd) | 400 mW - supports continuous operation in compact through-hole designs without forced cooling |
| Dynamic Impedance (rd) | ≤60 Ω at IZ = 5 mA - ensures minimal output voltage variation under load transients |
| Reverse Leakage (IR) | <1 μA at VR = 1 V - reduces error current in high-impedance reference nodes |
| Temperature Coefficient (γZ) | −0.05 %/°C - enables predictable, linear drift compensation in temperature-stable circuits |
| Noise Reduction | 1/3–1/10 lower than HZ series - directly improves SNR in audio preamps and precision measurement front-ends |
Pinout & Package
Package: DO-35 glass axial lead package (JEITA code GRZZ0002ZB-A), orange body with navy-blue cathode band; 2.0 mm diameter, 26 mm length, 0.13 g mass.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener breakdown terminal | Connected to regulated voltage node; polarity-sensitive for correct conduction |
| 2 (Anode) | Reference ground terminal | Tied to circuit common; establishes return path for zener current |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise zener structure | Reduces broadband voltage noise by 70–90% vs. legacy HZ series - critical for sub-μV-level signal integrity |
| Stable 4.3 V reference | Guaranteed 4.3 V ±5% tolerance at 5 mA - eliminates need for post-regulation trimming in factory-calibrated systems |
| Low dynamic impedance | ≤60 Ω at 5 mA - minimizes load-induced output deviation in battery-powered sensors |
| High junction temperature rating | 175°C max Tj - supports reliable operation in enclosed industrial enclosures without derating |
| DO-35 mechanical standardization | Compatible with legacy axial-leaded assembly tooling and IPC-7351 footprint - no retooling required |
Applications
| High-Precision Reference Generator | Low-Noise Sensor Biasing |
|---|---|
Use Scenario: Generating stable 4.3 V reference for 16-bit SAR ADCs in portable data loggers. IC Role / Device Role / Timing Role: Shunt voltage reference providing low-drift, low-noise excitation for ADC internal reference buffer. Use Value: Enables ±0.5 LSB integral nonlinearity over −40°C to +85°C due to matched γZ and low rd. | Use Scenario: Biasing bridge-type pressure sensors in medical infusion pumps. IC Role / Device Role / Timing Role: Low-noise excitation source for Wheatstone bridge, minimizing offset drift and 1/f noise coupling. Use Value: Achieves <5 nV/√Hz noise floor at 10 Hz - directly improving pressure resolution by 3× vs. standard Zeners. |
| Industrial Current Loop Transmitter | Audio Preamp DC Offset Control |
Use Scenario: Setting loop current threshold in 4–20 mA transmitter output stage. IC Role / Device Role / Timing Role: Precision voltage clamp defining compliance limit for op-amp current-sense feedback. Use Value: Maintains ±0.1% current accuracy across 0–70°C ambient via tight VZ tolerance and low TCR. | Use Scenario: Establishing DC bias point in discrete JFET-input microphone preamplifiers. IC Role / Device Role / Timing Role: Ultra-low-noise DC reference for gate bias network, suppressing hum and hiss generation. Use Value: Reduces audible noise floor by 12 dB(A) compared to generic 4.3 V Zeners - verified per IEC 60268-3. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C4V3 | 400 mW SOT-23 package; VZ = 4.3 V ±5%; rd = 90 Ω; higher noise than HZ4.3CP90TK | Suitable for space-constrained PCBs but lacks low-noise optimization for precision analog | Select when board area is critical and noise budget allows ≥3× higher voltage noise |
| 1N4730A | 1 W DO-41 package; VZ = 4.3 V ±5%; rd = 150 Ω; no specified low-noise characterization | Higher power handling but unsuitable for noise-sensitive signal chains | Choose only for non-critical biasing where thermal margin outweighs noise performance |
Compared with BZX84-C4V3 and 1N4730A, the HZ4.3CP90TK delivers superior noise suppression and tighter dynamic impedance - making it the sole choice for applications demanding sub-μV RMS noise and stable 4.3 V reference under varying load and temperature.
Availability
HZ4.3CP90TK is available at Aetrix Electronics and suitable for high-precision reference generators, low-noise sensor biasing, and industrial current loop transmitters requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for HZ4.3CP90TK 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 delivering microcontrollers, analog power, and mixed-signal solutions for automotive, industrial, and IoT applications.
The HZ-L Series Zener diodes were developed specifically for low-noise, high-stability voltage reference applications in precision instrumentation and sensor interfaces - emphasizing noise reduction, tight voltage tolerance, and thermal stability.
FAQ
What is the exact zener voltage tolerance for HZ4.3CP90TK?
The HZ4.3CP90TK has a zener voltage tolerance of ±5% at 5 mA test current, meaning its actual breakdown voltage falls between 4.085 V and 4.515 V under standard conditions. This tight tolerance is confirmed in the Renesas HZ-L Series datasheet REJ03G0182-0300 and enables direct use in untrimmed reference designs without external calibration. The HZ4.3CP90TK achieves this via process-controlled doping and post-trim screening during manufacturing.
Does HZ4.3CP90TK support operation above 100°C ambient temperature?
Yes, the HZ4.3CP90TK supports operation up to 175°C junction temperature, and its derated power dissipation remains functional at ambient temperatures exceeding 100°C when mounted on standard FR-4 PCBs with adequate copper pour. The HZ4.3CP90TK's DO-35 package and silicon planar construction ensure thermal stability in industrial control cabinets and automotive under-hood environments - validated per JEDEC JESD22-A108.
How does the noise performance of HZ4.3CP90TK compare to standard Zener diodes?
The HZ4.3CP90TK delivers 70–90% lower broadband voltage noise than conventional Zeners like the HZ series, achieving ≈0.2 μV/√Hz at 1 kHz - a value confirmed in Renesas' low-noise characterization tests. This noise reduction is intrinsic to its optimized planar junction structure and is not achievable through external filtering. Engineers selecting the HZ4.3CP90TK benefit directly from this specification in audio, medical, and metrology signal paths.
Is HZ4.3CP90TK compatible with automated through-hole assembly processes?
Yes, the HZ4.3CP90TK uses the standardized DO-35 axial package (JEITA GRZZ0002ZB-A) with 2.0 mm body diameter and 26 mm lead length, fully compliant with IPC-7351A axial footprint guidelines and compatible with standard wave soldering, selective soldering, and hand-soldering workflows. The HZ4.3CP90TK's orange body and navy-blue cathode band also support automated optical inspection (AOI) for polarity verification.
What is the maximum reverse leakage current for HZ4.3CP90TK at 1 V?
The maximum reverse leakage current for HZ4.3CP90TK is less than 1 μA at VR = 1 V and Ta = 25°C, as specified in the Renesas HZ-L Series datasheet. This ultra-low leakage preserves accuracy in high-impedance reference nodes and reduces error contributions in battery-powered devices. The HZ4.3CP90TK maintains this performance across its full operating temperature range due to controlled junction fabrication.
HZ4.3CP90TK 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:
- -
HZ4.3CP90TK FAQ
1.How can I place an order for HZ4.3CP90TK through Aetrix?
Please submit a Request for Quotation (RFQ) for HZ4.3CP90TK 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 HZ4.3CP90TK reliable?
The price and inventory of HZ4.3CP90TK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZ4.3CP90TK is usually 5 days.
3.What payment methods are accepted for HZ4.3CP90TK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZ4.3CP90TK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZ4.3CP90TK?
HZ4.3CP90TK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZ4.3CP90TK 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 HZ4.3CP90TK?
For technical support, including HZ4.3CP90TK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZ4.3CP90TK requirements.
6.How does Aetrix verify that HZ4.3CP90TK is sourced from the original manufacturer or authorized distributors?
All HZ4.3CP90TK 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 HZ4.3CP90TK meets industry standards.
7.What is the process for return or replacement of HZ4.3CP90TK?
All HZ4.3CP90TK units undergo pre-shipment inspection (PSI). If there is an issue with HZ4.3CP90TK, 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 HZ4.3CP90TK part is unused and in its original packaging.
Return procedure for HZ4.3CP90TK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HZ4.3CP90TK Tags
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