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Renesas HZ7A1RE-E
- Part No.:
- HZ7A1RE-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZ7A1RE-E.pdf
- Description:
- DIODE ZENER 0.5W
- Quantity:
- Payment:
- Shipping:
Inventory:8,000
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Product details
Overview
HZ7A1RE-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 6.45 V (min 6.3 V / max 6.6 V), dynamic resistance of 60 Ω at 0.5 mA, maximum power dissipation of 400 mW, and junction temperature rating of 175°C - deployed in reference voltage generators and low-drift sensor signal conditioning.
For engineers reviewing the HZ7A1RE-E datasheet, HZ7A1RE-E pinout, HZ7A1RE-E application, or HZ7A1RE-E equivalent, key selection criteria include zener voltage tolerance (±0.15 V), low noise performance (1/3–1/10 lower than standard HZ series), DO-35 package thermal limits, and reverse leakage current ≤1 μA at VR = 2.0 V.
Technical Context
This device operates as a two-terminal shunt regulator with DC-tested zener characteristics, designed for stable biasing in low-current analog subsystems where voltage reference stability and noise suppression are critical. Its low dynamic impedance (60 Ω) and tight VZ tolerance support high-accuracy feedback loops in instrumentation amplifiers and ADC reference circuits.
The HZ7A1RE-E uses a silicon planar construction with navy-blue cathode band marking and orange body color, housed in a DO-35 glass package (JEITA code GRZZ0002ZB-A). It exhibits a negative zener voltage temperature coefficient near 6.5 V, minimizing drift across industrial temperature ranges (−55°C to +175°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.3 V min / 6.6 V max at IZ = 0.5 mA - defines stable regulation window for precision 6.45 V references |
| Dynamic Resistance (rd) | 60 Ω max at IZ = 0.5 mA - ensures minimal output impedance variation under load transients |
| Power Dissipation (Pd) | 400 mW max at Ta = 25°C - sets thermal design limit for PCB trace width and copper pour |
| Reverse Leakage Current (IR) | ≤1 μA max at VR = 2.0 V - preserves accuracy in high-impedance bias networks |
| Junction Temperature (Tj) | 175°C max - enables operation in sealed enclosures or high-ambient industrial environments |
| Storage Temperature | −55°C to +175°C - supports automotive-grade storage and reflow soldering compatibility |
Pinout & Package
Package: DO-35 glass axial lead package (JEITA code GRZZ0002ZB-A), 2.0 mm diameter × 26.0 mm length, 0.13 g mass, orange body with navy-blue cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Regulated output node | Connected to higher-potential rail; carries reverse-biased current during regulation |
| 2 (Anode) | Reference ground node | Typically tied to system ground or low-impedance return path for stable VZ establishment |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise Zener operation | Noise level ≈1/3–1/10 that of standard HZ series - reduces RMS noise in voltage references by >10 dB |
| Tight zener voltage tolerance | ±0.15 V at 6.45 V nominal - enables direct use without external trimming in 12-bit+ systems |
| Low dynamic impedance | 60 Ω max at 0.5 mA - maintains regulation accuracy under ±10% load current variation |
| High thermal robustness | 175°C max junction temperature - supports operation in unventilated control cabinets |
| Stable low-leakage behavior | ≤1 μA IR at 2.0 V reverse bias - prevents error accumulation in high-Z op-amp inputs |
Applications
| Instrumentation Amplifier Reference | ADC Voltage Reference |
|---|---|
Use Scenario: Precision DC offset calibration in medical ECG front-ends requiring sub-10 μV drift over 8-hour monitoring cycles. IC Role / Device Role / Timing Role: Shunt-connected zener reference providing stable 6.45 V bias to instrumentation amplifier input stage. Use Value: Low noise and <±0.15 V VZ tolerance ensure baseline stability meets IEC 60601-2-27 Class B requirements. |
Use Scenario: 16-bit SAR ADC reference supply in industrial process transmitters operating at −40°C to +85°C ambient. IC Role / Device Role / Timing Role: Primary voltage reference source for internal DAC-based reference generation circuitry. Use Value: 60 Ω rd and 175°C Tj rating maintain reference accuracy despite load switching and thermal cycling. |
| Sensor Signal Conditioning | Low-Power RTD Excitation |
Use Scenario: Bridge excitation and offset nulling in strain-gauge load cells used in weigh-scale platforms. IC Role / Device Role / Timing Role: Stable bias generator for Wheatstone bridge completion resistors and op-amp common-mode setting. Use Value: ≤1 μA reverse leakage prevents measurement error in 10 MΩ+ bridge arms at 25°C ambient. |
Use Scenario: Constant-current excitation source for 3-wire Pt100 RTDs in HVAC zone controllers with battery backup. IC Role / Device Role / Timing Role: Zener-regulated current mirror reference node enabling 1 mA excitation stability. Use Value: 400 mW Pd allows sustained 1 mA operation into 6.45 Ω effective load with <1°C self-heating rise. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C6V2 | VZ = 6.2 V ±5%, rd = 100 Ω, Pd = 300 mW, SOT-23 package | Higher dynamic impedance and wider VZ tolerance; unsuitable for sub-0.5% reference accuracy | Select when board space is constrained and ±5% regulation is acceptable |
| 1N4735A | VZ = 6.2 V ±5%, rd = 9 Ω, Pd = 1 W, DO-41 package | Higher power rating but 3× higher noise and no low-noise specification; larger footprint | Select when high-power dissipation (>400 mW) is required and noise is secondary |
Compared with BZX84-C6V2 and 1N4735A, the HZ7A1RE-E delivers superior noise performance and tighter VZ tolerance in a compact DO-35 package, making it optimal for precision analog references where drift and spectral purity are design-critical.
Availability
HZ7A1RE-E is available at Aetrix Electronics and suitable for precision voltage reference, sensor signal conditioning, and low-noise analog front-end applications requiring stable component supply, long-term parametric consistency, and RoHS-compliant packaging.
Supply support for HZ7A1RE-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 power devices, and timing solutions for industrial, automotive, and infrastructure markets.
The HZ-L Series Zener diodes were developed specifically for low-noise, high-stability voltage reference applications in test equipment, medical instrumentation, and precision data acquisition systems.
FAQ
What is the exact zener voltage range specified for HZ7A1RE-E?
The HZ7A1RE-E has a guaranteed zener voltage range of 6.3 V minimum to 6.6 V maximum when tested at IZ = 0.5 mA and Ta = 25°C. This 0.3 V span reflects its tight tolerance design for precision reference use, and the typical value is 6.45 V. The HZ7A1RE-E datasheet confirms this range under DC test conditions with no AC modulation.
Does HZ7A1RE-E have a documented noise specification?
Yes - the HZ7A1RE-E datasheet explicitly states its noise level is approximately 1/3 to 1/10 lower than the legacy HZ series Zener diodes. This low-noise characteristic is achieved through optimized silicon planar processing and is validated across the full HZ-L family, including the HZ7A1RE-E variant.
What package type and marking does HZ7A1RE-E use?
HZ7A1RE-E uses the DO-35 glass axial package (JEITA code GRZZ0002ZB-A), with an orange body and navy-blue cathode band. Pin 1 is the cathode (marked end), and Pin 2 is the anode. The Renesas package drawing confirms dimensions: φD = 2.0 mm, L = 26.0 mm, and mass = 0.13 g.
Is HZ7A1RE-E suitable for surface-mount assembly?
No - the HZ7A1RE-E is through-hole only, packaged in DO-35 axial leads. It is not compatible with reflow or wave soldering for SMT lines. For surface-mount equivalents, consider discrete SOD-123 or SOT-23 Zeners with comparable VZ and rd, though none match the HZ7A1RE-E's low-noise specification.
What is the maximum reverse leakage current for HZ7A1RE-E?
The HZ7A1RE-E has a maximum reverse leakage current (IR) of 1 μA when tested at VR = 2.0 V and Ta = 25°C. This low leakage supports high-impedance bias networks and minimizes error in precision op-amp circuits where input bias currents must remain below 10 nA.
HZ7A1RE-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:
- -
HZ7A1RE-E FAQ
1.How can I place an order for HZ7A1RE-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZ7A1RE-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 HZ7A1RE-E reliable?
The price and inventory of HZ7A1RE-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZ7A1RE-E is usually 5 days.
3.What payment methods are accepted for HZ7A1RE-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZ7A1RE-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZ7A1RE-E?
HZ7A1RE-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZ7A1RE-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 HZ7A1RE-E?
For technical support, including HZ7A1RE-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZ7A1RE-E requirements.
6.How does Aetrix verify that HZ7A1RE-E is sourced from the original manufacturer or authorized distributors?
All HZ7A1RE-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 HZ7A1RE-E meets industry standards.
7.What is the process for return or replacement of HZ7A1RE-E?
All HZ7A1RE-E units undergo pre-shipment inspection (PSI). If there is an issue with HZ7A1RE-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 HZ7A1RE-E part is unused and in its original packaging.
Return procedure for HZ7A1RE-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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