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Renesas HZ4A1JTA-E
- Part No.:
- HZ4A1JTA-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZ4A1JTA-E.pdf
- Description:
- DIODE ZENER 0.5W
- Quantity:
- Payment:
- Shipping:
Inventory:10,000
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Product details
Overview
HZ4A1JTA-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 5.2 V, 400 mW power dissipation, and dynamic resistance of 150 Ω at 0.5 mA test current - deployed in reference voltage sources and sensor signal conditioning stages.
For engineers reviewing the HZ4A1JTA-E datasheet, HZ4A1JTA-E pinout, HZ4A1JTA-E application, or HZ4A1JTA-E equivalent, key selection criteria include zener voltage tolerance (±0.3 V), low noise performance versus standard HZ series, DO-35 package thermal limits, and temperature coefficient behavior below 10 V.
Technical Context
The HZ4A1JTA-E belongs to the HZ-L Series, optimized for reduced diode noise (1/3–1/10 that of legacy HZ diodes) via refined planar junction processing. Its zener voltage is specified at 5.2–5.5 V with 0.5 mA test current, and it exhibits low leakage (<1 μA at VR = 2.0 V) and low zener impedance (150 Ω).
Designed for DC-stabilized operation, the device operates within a junction temperature range of −55°C to +175°C and maintains stable regulation across ambient temperatures up to 75°C before derating begins, per its power dissipation vs. Ta curve.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.2 V min / 5.5 V max at IZ = 0.5 mA - defines tight regulation window for 5 V reference designs |
| Power Dissipation (Pd) | 400 mW at Ta = 25°C - sets maximum continuous DC power handling in DO-35 package |
| Dynamic Resistance (rd) | 150 Ω max at IZ = 0.5 mA - determines output impedance and load regulation sensitivity |
| Reverse Leakage Current (IR) | 1 μA max at VR = 2.0 V - ensures minimal error current in high-impedance bias networks |
| Junction Temperature (Tj) | 175°C max - enables reliable operation in thermally constrained PCB layouts |
| Temperature Coefficient (γZ) | ≈ −0.06 %/°C (typ.) near 5.2 V - indicates negative drift requiring compensation in wide-temp applications |
Pinout & Package
Package: DO-35 (JEITA code GRZZ0002ZB-A), glass axial leaded package with orange body and navy-blue cathode band; dimensions per SC-40 standard (L = 26.0 mm, φD = 2.0 mm, φb = 0.5 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener voltage reference node | Connected to regulated output; polarity must be observed to avoid forward conduction |
| 2 (Anode) | Reference ground return | Bias current flows from cathode to anode; anode tied to circuit common or current-limiting resistor |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise Zener operation | Noise level ≈ 1/3–1/10 that of standard HZ-series diodes - critical for audio preamps and precision ADC references |
| Stable low-voltage regulation | 5.2–5.5 V range with ±0.3 V tolerance at 0.5 mA - supports tight 5 V rail monitoring without trimming |
| Low zener impedance | 150 Ω max at 0.5 mA - minimizes output voltage shift under varying load currents |
| High thermal robustness | 175°C max junction temperature - allows use in sealed enclosures or near heat-generating components |
| DO-35 mechanical compatibility | Standard axial footprint with 2.0 mm diameter - enables drop-in replacement in legacy through-hole power supply designs |
Applications
| Instrumentation Reference | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Precision 5 V reference in portable multimeters and handheld calibration tools. IC Role / Device Role / Timing Role: Zener diode providing stable, low-drift voltage reference for ADC input scaling and DAC feedback. Use Value: Low noise and tight VZ tolerance reduce measurement uncertainty below 0.1% FS in 4½-digit instruments. |
Use Scenario: Biasing and excitation for bridge-based pressure transducers in factory automation systems. IC Role / Device Role / Timing Role: Low-leakage Zener establishing stable excitation voltage for Wheatstone bridges. Use Value: Sub-1 μA reverse leakage prevents offset drift in high-impedance sensor interfaces over temperature. |
| Audio Equipment Power Rails | Medical Diagnostic Front-Ends |
Use Scenario: Local regulation for op-amp bias rails in studio microphone preamplifiers. IC Role / Device Role / Timing Role: Low-noise Zener supplying clean ±5 V rails to discrete JFET input stages. Use Value: 1/3–1/10 noise reduction versus standard Zeners preserves SNR >110 dB in analog signal paths. |
Use Scenario: Reference voltage source for ECG amplifier gain-setting networks in portable monitors. IC Role / Device Role / Timing Role: Stable 5.2 V reference enabling accurate gain calibration and baseline stability. Use Value: 150 Ω dynamic resistance ensures <0.5 mV output shift under 100 μA load variation across patient motion events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5221B (ON Semiconductor) | 5.1 V nominal, 600 mW Pd, rd = 17 Ω, but higher noise and no HZ-L-series low-noise optimization | Suitable for general-purpose regulation where noise is non-critical; lacks documented low-noise spec | Select only if higher power rating is required and noise floor is secondary |
| BZX55-C5V1 (Vishay) | 5.1 V nominal, 500 mW Pd, rd = 60 Ω, wider VZ tolerance (±5%), no low-noise characterization | Used in cost-sensitive consumer power supplies; not characterized for analog reference noise performance | Acceptable for non-precision applications; avoid where sub-100 nV/√Hz noise matters |
Compared with 1N5221B and BZX55-C5V1, the HZ4A1JTA-E delivers verified low-noise operation and tighter VZ control essential for metrology-grade references, while trading off slightly higher dynamic resistance for superior noise immunity in sensitive analog front-ends.
Availability
HZ4A1JTA-E is available at Aetrix Electronics and suitable for instrumentation reference design, industrial sensor signal conditioning, and medical diagnostic front-end development requiring stable component supply with traceable sourcing and long-term lifecycle support.
Supply support for HZ4A1JTA-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, and power devices, with deep expertise in precision analog and automotive-grade components.
The HZ-L Series was developed by Renesas specifically for low-noise voltage reference applications in test equipment, medical electronics, and high-fidelity audio - emphasizing noise reduction, thermal stability, and tight zener voltage control.
FAQ
What is the exact zener voltage range for HZ4A1JTA-E?
The HZ4A1JTA-E has a guaranteed zener voltage range of 5.2 V minimum to 5.5 V maximum when tested at IZ = 0.5 mA and Ta = 25°C. This 0.3 V span reflects tight binning for precision reference use, and the value remains stable across its rated junction temperature range up to 175°C.
Is HZ4A1JTA-E compatible with standard DO-35 footprints?
Yes, the HZ4A1JTA-E uses the industry-standard DO-35 package (JEITA code GRZZ0002ZB-A) with 2.0 mm body diameter and 26 mm overall length. Its axial leads and navy-blue cathode band align with IPC-7351 requirements, enabling direct placement in existing DO-35 land patterns without layout modification.
How does the noise performance of HZ4A1JTA-E compare to generic Zener diodes?
The HZ4A1JTA-E achieves approximately 1/3 to 1/10 the noise level of standard HZ-series Zeners due to Renesas' optimized planar junction process. This is confirmed in the HZ-L Series datasheet (REJ03G0182-0300), making HZ4A1JTA-E suitable for ultra-low-noise applications such as precision ADC references and audio preamp biasing where noise floor directly impacts system SNR.
What is the maximum reverse leakage current for HZ4A1JTA-E?
The HZ4A1JTA-E specifies a maximum reverse leakage current (IR) of 1 μA at VR = 2.0 V and Ta = 25°C. This low leakage supports high-impedance bias networks in sensor interfaces and reference dividers, minimizing error current-induced offset in precision analog circuits.
Can HZ4A1JTA-E be used in surface-mount designs?
No, the HZ4A1JTA-E is exclusively offered in the through-hole DO-35 axial package and is not available in SMD variants. For surface-mount alternatives, engineers should evaluate Renesas' HZ-L Series SOD-123 or SOD-323 packaged equivalents - but note that HZ4A1JTA-E itself requires axial through-hole mounting with appropriate lead spacing and solder pad geometry.
HZ4A1JTA-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:
- -
HZ4A1JTA-E FAQ
1.How can I place an order for HZ4A1JTA-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZ4A1JTA-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 HZ4A1JTA-E reliable?
The price and inventory of HZ4A1JTA-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZ4A1JTA-E is usually 5 days.
3.What payment methods are accepted for HZ4A1JTA-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZ4A1JTA-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZ4A1JTA-E?
HZ4A1JTA-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZ4A1JTA-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 HZ4A1JTA-E?
For technical support, including HZ4A1JTA-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZ4A1JTA-E requirements.
6.How does Aetrix verify that HZ4A1JTA-E is sourced from the original manufacturer or authorized distributors?
All HZ4A1JTA-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 HZ4A1JTA-E meets industry standards.
7.What is the process for return or replacement of HZ4A1JTA-E?
All HZ4A1JTA-E units undergo pre-shipment inspection (PSI). If there is an issue with HZ4A1JTA-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 HZ4A1JTA-E part is unused and in its original packaging.
Return procedure for HZ4A1JTA-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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