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Renesas HZ4A1JTD-E
- Part No.:
- HZ4A1JTD-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZ4A1JTD-E.pdf
- Description:
- DIODE ZENER 0.5W
- Quantity:
- Payment:
- Shipping:
Inventory:7,500
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Product details
Overview
HZ4A1JTD-E from Renesas is a silicon planar Zener diode engineered for low-noise voltage regulation in precision analog circuits, with a nominal zener voltage of 5.2 V, maximum power dissipation of 400 mW, dynamic resistance of 150 Ω at 0.5 mA, and junction temperature rating up to 175°C - deployed in reference voltage sources and low-drift sensor signal conditioning.
For engineers reviewing the HZ4A1JTD-E datasheet, HZ4A1JTD-E pinout, HZ4A1JTD-E application, or HZ4A1JTD-E equivalent, key selection criteria include zener voltage tolerance (±0.3 V), low noise performance (1/3–1/10 that of standard HZ series), DO-35 package compatibility, and thermal stability across −55°C to +175°C storage range.
Technical Context
This device operates as a two-terminal voltage reference using avalanche breakdown in a planar-diffused silicon junction, optimized for DC-stabilized biasing where low dynamic impedance and minimal voltage drift are critical. Its zener voltage is specified at 0.5 mA test current with DC excitation only.
The HZ4A1JTD-E belongs to the HZ-L Series, distinguished by navy-blue cathode band marking and orange body color, and exhibits a negative temperature coefficient below 5.6 V - consistent with its 5.2 V nominal rating and measured γZ of approximately −0.08 %/°C per Figure 2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.2 V (min) to 5.5 V (max) at IZ = 0.5 mA - defines stable reference point for ±0.3 V tolerance in low-power analog rails |
| Dynamic Resistance (rd) | 150 Ω max at IZ = 0.5 mA - ensures minimal output voltage variation under load transients |
| Power Dissipation (Pd) | 400 mW max at Ta = 25°C - supports operation in compact PCB layouts without forced cooling |
| Junction Temperature (Tj) | 175°C max - enables reliability in high-ambient industrial environments |
| Reverse Leakage (IR) | 1 μA max at VR = 2.0 V - reduces error current in high-impedance reference networks |
| Package | DO-35 (JEITA code GRZZ0002ZB-A) - industry-standard axial leaded package with 2.0 mm diameter and 26 mm body length |
Pinout & Package
DO-35 glass axial package with cathode identified by navy-blue band; total mass ≈ 0.13 g; dimensions: φD = 2.0 mm (nom), L = 26.0 mm (min), E = 4.2 mm (max).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (banded end) | Cathode | Connected to regulated output node; polarity must be observed to maintain reverse-bias operation |
| 2 (non-banded end) | Anode | Connected to ground or lower-potential rail; forms current path during zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| Noise Performance | Approximately 1/3–1/10 lower than standard HZ-series diodes - directly improves SNR in precision ADC references and op-amp biasing |
| Zener Voltage Range | 5.2 V to 38 V available across HZ-L family - enables single-supplier sourcing for multi-rail systems requiring matched low-noise references |
| Thermal Stability | Negative temperature coefficient near −0.08 %/°C at 5.2 V - predictable drift behavior simplifies compensation in wide-temperature designs |
| Low Leakage | ≤1 μA at 2.0 V reverse bias - minimizes loading error in high-Z feedback networks and battery-powered sensors |
Applications
| High-Precision Reference Source | Low-Drift Sensor Signal Conditioning |
|---|---|
Use Scenario: Stable 5.2 V reference for 16-bit SAR ADCs in industrial data acquisition modules operating from unregulated 12 V rails. IC Role / Device Role / Timing Role: Two-terminal passive voltage clamp providing fixed bias point for ADC internal reference buffer and external analog front-end. Use Value: Enables ≤0.02% full-scale linearity error by maintaining <±1 mV drift over 0–70°C ambient range due to low rd and controlled γZ. |
Use Scenario: Biasing bridge-based strain gauges in structural health monitoring nodes powered by Li-ion batteries. IC Role / Device Role / Timing Role: Low-noise zener element establishing excitation voltage for Wheatstone bridge, minimizing Johnson-Nyquist noise contribution. Use Value: Reduces system noise floor by >10 dB compared to standard HZ diodes, improving resolution of microstrain measurements. |
| Stabilized Power Supply Feedback | Temperature-Compensated Oscillator Bias |
Use Scenario: Secondary-side voltage sensing in isolated flyback converters targeting ±1% output regulation across line/load variations. IC Role / Device Role / Timing Role: Precision shunt reference feeding optocoupler input to close regulation loop without auxiliary winding. Use Value: Delivers stable 5.2 V threshold despite 100 ppm/°C ambient shifts, reducing output drift to <±0.5% over −40°C to +85°C. |
Use Scenario: Bias network for Colpitts oscillator in RF telemetry transmitters requiring frequency stability within ±50 ppm over temperature. IC Role / Device Role / Timing Role: Low-drift voltage source setting varactor tuning range and active device quiescent point. Use Value: Limits oscillator center-frequency drift to <±15 ppm by suppressing supply-induced modulation of transistor transconductance. |
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 |
|---|---|---|---|
| 1N5221B (ON Semiconductor) | Zener voltage 3.3 V, 500 mW Pd, rd = 17 Ω at 20 mA - higher test current, lower rd, but wider VZ tolerance (±5%) | Optimized for higher-current shunt regulation; unsuitable for ultra-low-noise 0.5 mA bias networks | Select only if circuit requires ≥20 mA zener current and can tolerate higher noise and looser initial tolerance |
| BZX55-C5V1 (Vishay) | Zener voltage 5.1 V, ±5% tolerance, rd = 600 Ω at 5 mA - higher dynamic impedance, no low-noise specification | General-purpose stabilization; lacks documented noise reduction vs. HZ-L series | Acceptable for cost-sensitive non-precision applications where 5.1 V nominal and ±5% tolerance are acceptable |
Compared with 1N5221B and BZX55-C5V1, the HZ4A1JTD-E provides tighter voltage tolerance (±0.3 V), verified low-noise performance, and optimized 0.5 mA test condition - making it uniquely suitable for low-current, high-stability analog reference design where noise and drift dominate error budgets.
Availability
HZ4A1JTD-E is available at Aetrix Electronics and suitable for precision voltage reference, low-noise sensor biasing, and stabilized power supply feedback applications requiring stable component supply, long-term parametric consistency, and traceable lot-level compliance documentation.
Supply support for HZ4A1JTD-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 manufacturer specializing in microcontrollers, analog and power devices, and SoC solutions for industrial, automotive, and infrastructure markets.
The HZ-L Series was developed specifically for low-noise, high-stability voltage reference applications in precision instrumentation and sensor interfaces - emphasizing reduced diode noise, tight zener voltage tolerance, and robust thermal performance in axial-glass packaging.
FAQ
What is the exact zener voltage range for HZ4A1JTD-E?
The HZ4A1JTD-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 tolerance is significantly tighter than general-purpose Zener diodes and supports high-accuracy reference design without post-manufacturing trimming. The HZ4A1JTD-E maintains this specification across its qualified operating temperature range.
Is HZ4A1JTD-E compatible with DO-35 footprint on PCBs?
Yes, the HZ4A1JTD-E uses the standard DO-35 glass axial package (JEITA code GRZZ0002ZB-A) with 2.0 mm body diameter and 26 mm minimum length. Its lead spacing and mechanical dimensions match industry-standard DO-35 footprints, enabling direct replacement in existing layouts designed for similar axial Zener diodes without rework.
Does HZ4A1JTD-E have a specified noise voltage level?
While an absolute nanovolt-level noise figure is not published, the HZ4A1JTD-E datasheet explicitly states its noise level is approximately 1/3 to 1/10 that of the legacy HZ series. This relative improvement is achieved through optimized planar diffusion and junction geometry, and is validated across the HZ-L Series for use in low-noise analog references and sensor excitation circuits.
What is the maximum reverse leakage current for HZ4A1JTD-E?
The HZ4A1JTD-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 reference networks and battery-powered applications where standby current must remain below 10 μA. Measured values typically fall well below this limit in production lots.
Can HZ4A1JTD-E operate at elevated ambient temperatures?
Yes, the HZ4A1JTD-E is rated for storage from −55°C to +175°C and has a maximum junction temperature of 175°C. Its power derating curve (Figure 3) shows usable dissipation down to ~200 mW at 75°C ambient, supporting deployment in enclosed industrial enclosures or near heat-generating components without thermal shutdown.
HZ4A1JTD-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:
- -
HZ4A1JTD-E FAQ
1.How can I place an order for HZ4A1JTD-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZ4A1JTD-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 HZ4A1JTD-E reliable?
The price and inventory of HZ4A1JTD-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZ4A1JTD-E is usually 5 days.
3.What payment methods are accepted for HZ4A1JTD-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZ4A1JTD-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZ4A1JTD-E?
HZ4A1JTD-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZ4A1JTD-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 HZ4A1JTD-E?
For technical support, including HZ4A1JTD-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZ4A1JTD-E requirements.
6.How does Aetrix verify that HZ4A1JTD-E is sourced from the original manufacturer or authorized distributors?
All HZ4A1JTD-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 HZ4A1JTD-E meets industry standards.
7.What is the process for return or replacement of HZ4A1JTD-E?
All HZ4A1JTD-E units undergo pre-shipment inspection (PSI). If there is an issue with HZ4A1JTD-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 HZ4A1JTD-E part is unused and in its original packaging.
Return procedure for HZ4A1JTD-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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