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Renesas HZ7A1L-J-E
- Part No.:
- HZ7A1L-J-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZ7A1L-J-E.pdf
- Description:
- DIODE ZENER
- Quantity:
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Product details
Overview
HZ7A1L-J-E from Renesas is a silicon planar Zener diode optimized for low-noise voltage regulation in precision analog circuits, featuring a nominal zener voltage of 6.3–6.6 V at 0.5 mA test current, dynamic resistance of 60 Ω max, 400 mW power dissipation, and DO-35 glass package with navy blue cathode band. It serves as a stable reference in low-drift power supply feedback paths and sensor biasing networks.
For engineers reviewing the HZ7A1L-J-E datasheet, HZ7A1L-J-E pinout, HZ7A1L-J-E application, or HZ7A1L-J-E equivalent, key selection criteria include its low noise level (≈1/3–1/10 of standard HZ series), tight zener voltage tolerance, low leakage, and temperature coefficient behavior across 6.3–6.6 V range - critical for high-fidelity instrumentation and low-drift reference design.
Technical Context
The HZ7A1L-J-E operates as a two-terminal voltage reference device using silicon planar junction technology, with zener breakdown mechanism dominant in its 6.3–6.6 V range. Its low dynamic resistance (≤60 Ω) and low reverse leakage (<1 μA at VR = 2.0 V) support stable regulation under varying load conditions.
Designed for DC-stabilized operation, it exhibits a zener voltage temperature coefficient of approximately −0.02 %/°C near 6.5 V (inferred from Fig.2 trend for HZ7-series variants), and maintains thermal stability up to 175°C junction temperature while housed in a DO-35 glass axial package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.3–6.6 V at IZ = 0.5 mA - defines precise DC reference point for feedback loops |
| Dynamic Resistance (rd) | ≤60 Ω at IZ = 0.5 mA - ensures minimal output voltage variation under load transients |
| Power Dissipation (Pd) | 400 mW at Ta = 25°C - sets maximum continuous DC power handling in free-air mounting |
| Reverse Leakage (IR) | ≤1 μA at VR = 2.0 V - enables ultra-low quiescent current in high-impedance bias networks |
| Junction Temperature (Tj) | −55 to +175°C - supports operation in industrial and automotive under-hood environments |
| Noise Level | ≈1/3–1/10 of HZ-series diodes - directly reduces RMS noise contribution in sensitive analog references |
Pinout & Package
Package: DO-35 glass axial package (JEITA code GRZZ0002ZB-A), orange body with navy blue cathode band; 2.0 mm diameter × 26.0 mm length; 0.13 g mass.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener voltage reference terminal | Connected to regulated output node; polarity must be observed to maintain reverse-bias operation |
| 2 (Anode) | Reference ground return | Common return path for bias current; forms closed loop with series resistor and load |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise zener structure | Reduces broadband voltage noise by factor of 3–10 vs. legacy HZ series - critical for audio preamps and ADC references |
| Tight zener voltage tolerance | ±0.15 V window (6.3–6.6 V) at 0.5 mA enables accurate 6.5 V ±2.3% reference without trimming |
| Low dynamic impedance | 60 Ω max ensures <1 mV output shift per 1 mA load change - suitable for low-current sensor excitation |
| High thermal stability | 175°C max junction temperature allows use in compact enclosures with limited airflow |
| DO-35 mechanical robustness | Hermetically sealed glass package resists humidity and long-term parameter drift in industrial environments |
Applications
| Industrial Sensor Signal Conditioning | Low-Noise Audio Reference Supply |
|---|---|
Use Scenario: Precision bridge sensor (e.g., strain gauge) interfaced to instrumentation amplifier requiring stable 6.5 V excitation. IC Role / Device Role / Timing Role: Zener diode provides low-noise, low-drift voltage reference for ratiometric excitation source. Use Value: 60 Ω dynamic resistance and sub-μA leakage minimize excitation error and offset drift over temperature. |
Use Scenario: Dual-rail op-amp stage in microphone preamplifier demanding ultra-low-noise bias voltage. IC Role / Device Role / Timing Role: Low-noise zener reference supplies clean virtual ground or bias node for JFET-input stages. Use Value: Noise reduction of 3–10× versus standard Zeners suppresses audible hiss in high-gain analog signal chains. |
| Medical Instrumentation Biasing | Programmable Logic Controller (PLC) Analog Input Protection |
Use Scenario: Biopotential amplifier front-end requiring stable, low-drift reference for electrode biasing. IC Role / Device Role / Timing Role: Zener diode establishes patient-isolated DC bias point with minimal thermal EMF contribution. Use Value: −55 to +175°C operating range and low tempco ensure calibration stability across clinical ambient variations. |
Use Scenario: Overvoltage clamp on 4–20 mA analog input channel of industrial PLC module. IC Role / Device Role / Timing Role: Fast-acting shunt protection element limiting transient-induced damage to ADC front-end. Use Value: 400 mW power rating and low rd enable reliable clamping of short-duration surges without thermal runaway. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4734A | Zener voltage 5.6 V (fixed), rd = 9 Ω, Pd = 1 W, DO-41 package | Higher power, lower rd, but wider Vz tolerance (±5%) and higher noise than HZ7A1L-J-E | Select when higher surge energy handling is required and 5.6 V reference suffices |
| BZX55C6V2 | Zener voltage 6.2 V (±5%), rd = 10 Ω, Pd = 500 mW, DO-35 package | Loose Vz tolerance, no low-noise specification, higher leakage (>5 μA), but broader vendor availability | Choose for cost-sensitive industrial controls where noise and tight tolerance are non-critical |
Compared with 1N4734A and BZX55C6V2, the HZ7A1L-J-E delivers superior noise performance and tighter voltage control in a DO-35 footprint, making it preferred for metrology-grade references - though its 400 mW rating requires careful thermal design in high-power layouts.
Availability
HZ7A1L-J-E is available at Aetrix Electronics and suitable for industrial sensor conditioning, low-noise audio reference supply, medical instrumentation biasing, and PLC analog input protection requiring stable component supply with traceable sourcing and long-lifecycle support.
Supply support for HZ7A1L-J-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 for industrial, automotive, and infrastructure markets.
The HZ-L Series was developed specifically for low-noise, high-stability voltage reference applications in precision analog systems - emphasizing reduced zener noise, tight voltage tolerance, and robust thermal performance in glass-package discrete diodes.
FAQ
What is the exact zener voltage range for HZ7A1L-J-E at 0.5 mA test current?
The HZ7A1L-J-E has a guaranteed zener voltage range of 6.3 V to 6.6 V when measured at IZ = 0.5 mA and Ta = 25°C, as specified in the REJ03G0182-0300 datasheet. This 0.3 V window reflects tight process control for precision reference use, and the value is verified via DC testing per Note 1 on page 2.
Does HZ7A1L-J-E have a documented temperature coefficient, and how does it affect circuit stability?
While the HZ7A1L-J-E datasheet does not list a specific γZ value, Figure 2 shows that HZ7-series diodes exhibit a temperature coefficient near −0.02 %/°C at ~6.5 V. This translates to ≈−1.3 mV/°C drift, enabling predictable compensation in temperature-critical references - confirmed by the family-level characterization in REJ03G0182-0300.
Can HZ7A1L-J-E replace standard Zener diodes like 1N4735A in existing designs?
Yes, HZ7A1L-J-E can replace 1N4735A (6.2 V) in DO-35-compatible layouts, but only if the 6.3–6.6 V range and lower noise profile align with system requirements. Its 60 Ω dynamic resistance is higher than 1N4735A's 7 Ω, so load regulation performance differs - verify stability under actual operating current before substitution.
What is the maximum reverse leakage current for HZ7A1L-J-E, and under what condition is it specified?
The HZ7A1L-J-E has a maximum reverse leakage current of 1 μA, specified at VR = 2.0 V and Ta = 25°C (page 2, Electrical Characteristics table). This low leakage supports high-impedance bias networks and minimizes error in precision current sources where leakage would otherwise dominate.
Is HZ7A1L-J-E suitable for surface-mount assembly, or is it through-hole only?
HZ7A1L-J-E is exclusively a through-hole device in DO-35 glass axial package - it is not surface-mount compatible. The package dimensions (2.0 mm Ø × 26.0 mm L) and lead form require axial PCB mounting with hole spacing matching the body length; no SMD variant exists in the HZ-L Series.
HZ7A1L-J-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:
- -
HZ7A1L-J-E FAQ
1.How can I place an order for HZ7A1L-J-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZ7A1L-J-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 HZ7A1L-J-E reliable?
The price and inventory of HZ7A1L-J-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZ7A1L-J-E is usually 5 days.
3.What payment methods are accepted for HZ7A1L-J-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZ7A1L-J-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZ7A1L-J-E?
HZ7A1L-J-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZ7A1L-J-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 HZ7A1L-J-E?
For technical support, including HZ7A1L-J-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZ7A1L-J-E requirements.
6.How does Aetrix verify that HZ7A1L-J-E is sourced from the original manufacturer or authorized distributors?
All HZ7A1L-J-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 HZ7A1L-J-E meets industry standards.
7.What is the process for return or replacement of HZ7A1L-J-E?
All HZ7A1L-J-E units undergo pre-shipment inspection (PSI). If there is an issue with HZ7A1L-J-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 HZ7A1L-J-E part is unused and in its original packaging.
Return procedure for HZ7A1L-J-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HZ7A1L-J-E Tags
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