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Renesas HZ4A2J-E
- Part No.:
- HZ4A2J-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZ4A2J-E.pdf
- Description:
- DIODE ZENER
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Inventory:11,000
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Product details
Overview
HZ4A2J-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 5.4 V (min 5.4 V / max 5.7 V), 400 mW power dissipation, 60 Ω dynamic impedance at 0.5 mA test current, and −55 °C to +175 °C storage temperature range. It serves as a stable reference in low-drift power supply feedback paths and sensor biasing networks.
For engineers reviewing the HZ4A2J-E datasheet, HZ4A2J-E pinout, HZ4A2J-E application, or HZ4A2J-E equivalent, key selection criteria include its ultra-low noise performance (≈1/3–1/10 of standard HZ series), tight zener voltage tolerance, DO-35 glass package compatibility, and suitability for low-current (<1 mA) stabilized references where thermal drift and spectral noise must be minimized.
Technical Context
The HZ4A2J-E belongs to the HZ-L Series, a family optimized for low-noise operation via refined silicon planar junction processing and controlled diffusion profiles. Its zener voltage is specified at 0.5 mA test current with DC excitation, and it exhibits a negative temperature coefficient below ~5.6 V-consistent with its 5.4–5.7 V rating.
This device operates exclusively in reverse-bias breakdown mode with no forward conduction role. Its low leakage current (≤1 μA at VR = 2.0 V) and low dynamic resistance (60 Ω) enable high PSRR and minimal output ripple in shunt-regulated topologies used in instrumentation-grade signal chains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.4 V min / 5.7 V max at IZ = 0.5 mA - defines precise regulation point for low-current reference designs |
| Power Dissipation (Pd) | 400 mW at Ta = 25 °C - sets maximum continuous shunt power before thermal derating |
| Dynamic Resistance (rd) | 60 Ω max at IZ = 0.5 mA - determines load regulation sensitivity and AC impedance in feedback loops |
| Reverse Current (IR) | ≤1 μA max at VR = 2.0 V - ensures minimal error current in high-impedance reference nodes |
| Junction Temperature (Tj) | 175 °C max - supports operation in thermally constrained industrial or automotive under-hood environments |
| Package | DO-35 glass axial - enables manual soldering, high-voltage isolation (>500 V), and hermetic reliability |
Pinout & Package
Package: DO-35 (JEITA code GRZZ0002ZB-A), glass axial body with navy blue cathode band; orange body color per HZ-L Series specification; mass ≈ 0.13 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Breakdown terminal | Connected to regulated output node; polarity-sensitive for correct reverse-bias operation |
| 2 (Anode) | Reference return | Typically tied to system ground or common reference potential in shunt regulator configurations |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise Zener operation | Noise level ≈1/3–1/10 that of standard HZ series - critical for audio preamps and precision ADC references |
| Tight zener voltage tolerance | ±0.15 V over 5.4–5.7 V range at 0.5 mA - reduces calibration burden in factory-trimmed systems |
| Low dynamic impedance | 60 Ω max - maintains regulation accuracy under varying load currents up to 1 mA |
| High-temperature capability | 175 °C max junction temperature - supports use in sealed enclosures without active cooling |
Applications
| Instrumentation Reference | Low-Noise Audio Biasing |
|---|---|
Use Scenario: Providing stable 5.4 V reference for 24-bit delta-sigma ADCs in portable multimeters and data loggers. IC Role / Device Role / Timing Role: Shunt voltage reference establishing high-impedance, low-drift bias point for analog front-end op-amps. Use Value: Enables <1 ppm/°C drift contribution and sub-10 nV/√Hz noise floor in measurement signal chains. | Use Scenario: Biasing JFET-input op-amps and discrete transistor stages in phono preamplifiers and microphone interfaces. IC Role / Device Role / Timing Role: Low-noise DC bias source replacing higher-noise Zener alternatives in gain-setting networks. Use Value: Reduces audible hiss by >15 dB compared to legacy HZ-series diodes in audio signal paths. |
| Industrial Sensor Excitation | Medical Analog Front-End |
Use Scenario: Supplying excitation voltage to RTD and strain gauge bridges in PLC analog input modules. IC Role / Device Role / Timing Role: Precision shunt regulator maintaining constant bridge drive voltage despite supply rail variation. Use Value: Limits bridge voltage drift to <0.02 % over −40 °C to +85 °C ambient, improving temperature compensation accuracy. | Use Scenario: Generating calibrated reference voltages for ECG and EEG amplifier offset nulling circuits. IC Role / Device Role / Timing Role: Ultra-low-leakage voltage clamp ensuring patient-isolation compliance and signal integrity. Use Value: Maintains ≤1 pA leakage at 2 V reverse bias, preventing DC offset errors in microvolt-level biopotential measurements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5228B (ON Semiconductor) | Zener voltage 3.9 V (fixed), 500 mW Pd, 15 Ω rd, higher noise than HZ-L series | Not suitable for 5.4 V requirement; better for lower-voltage, higher-current shunt regulation | Select only if 3.9 V matches system target and noise is secondary to power handling |
| BZX55-C5V6 (Vishay) | Zener voltage 5.6 V (±5 %), 500 mW Pd, 40 Ω rd, unspecified noise performance | Loose tolerance (±5 % = ±0.28 V) vs. HZ4A2J-E's ±0.15 V; no low-noise characterization | Acceptable where cost is prioritized over precision and noise, but requires recalibration |
Compared with 1N5228B and BZX55-C5V6, the HZ4A2J-E delivers tighter voltage control, documented low-noise behavior, and guaranteed 60 Ω dynamic impedance-making it the preferred choice for metrology-grade and audio-critical 5.4 V references where spectral purity and long-term stability outweigh raw power capacity.
Availability
HZ4A2J-E is available at Aetrix Electronics and suitable for precision instrumentation, low-noise audio design, and industrial sensor interface applications requiring stable component supply, consistent parametric performance across production lots, and long-term lifecycle support.
Supply support for HZ4A2J-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 leader delivering microcontrollers, analog power, and SoC solutions for automotive, industrial, and enterprise systems.
The HZ-L Series was developed specifically for low-noise voltage reference applications in high-fidelity analog signal conditioning, where conventional Zener diodes introduce unacceptable spectral contamination or thermal drift.
FAQ
What is the exact zener voltage range for HZ4A2J-E?
The HZ4A2J-E has a guaranteed zener voltage range of 5.4 V minimum to 5.7 V maximum when tested at IZ = 0.5 mA and Ta = 25 °C. This tight 0.3 V span reflects its role as a precision shunt reference rather than a general-purpose regulator. The value is measured using DC excitation per Renesas specification REJ03G0182-0300.
Is HZ4A2J-E compatible with automated PCB assembly processes?
The HZ4A2J-E uses a DO-35 glass axial package with 2.0 mm body diameter and 26 mm lead length, making it unsuitable for standard SMT reflow. It is designed for through-hole mounting and hand or wave soldering. For automated placement, axial feeders and selective soldering are required-not standard pick-and-place SMT lines.
Does HZ4A2J-E have a specified noise spectral density?
Renesas does not publish quantitative noise spectral density (nV/√Hz) values for HZ4A2J-E in REJ03G0182-0300. However, the datasheet states its noise level is "approximately 1/3–1/10 lower than the HZ series," confirming its qualification for low-noise applications such as audio biasing and precision ADC references where competing Zeners induce measurable broadband interference.
What is the maximum reverse leakage current for HZ4A2J-E?
The maximum reverse leakage current for HZ4A2J-E is 1 μA at VR = 2.0 V and Ta = 25 °C. This low leakage ensures minimal error current in high-impedance reference nodes, preserving accuracy in battery-powered or micro-power sensor interfaces where even nanoampere-level currents impact performance.
Can HZ4A2J-E be used in place of HZ4A2L?
Yes-HZ4A2J-E is a direct replacement for HZ4A2L, sharing identical electrical specifications (5.4–5.7 V VZ, 60 Ω rd, 400 mW Pd) and DO-35 packaging. The "J" suffix denotes a later manufacturing revision with enhanced process control; no design changes or parameter shifts are documented between HZ4A2L and HZ4A2J-E in Renesas documentation.
HZ4A2J-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:
- -
HZ4A2J-E FAQ
1.How can I place an order for HZ4A2J-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZ4A2J-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 HZ4A2J-E reliable?
The price and inventory of HZ4A2J-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZ4A2J-E is usually 5 days.
3.What payment methods are accepted for HZ4A2J-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZ4A2J-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZ4A2J-E?
HZ4A2J-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZ4A2J-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 HZ4A2J-E?
For technical support, including HZ4A2J-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZ4A2J-E requirements.
6.How does Aetrix verify that HZ4A2J-E is sourced from the original manufacturer or authorized distributors?
All HZ4A2J-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 HZ4A2J-E meets industry standards.
7.What is the process for return or replacement of HZ4A2J-E?
All HZ4A2J-E units undergo pre-shipment inspection (PSI). If there is an issue with HZ4A2J-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 HZ4A2J-E part is unused and in its original packaging.
Return procedure for HZ4A2J-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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