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Renesas HZ7B2J-E
- Part No.:
- HZ7B2J-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZ7B2J-E.pdf
- Description:
- DIODE ZENER
- Quantity:
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- Shipping:
Inventory:6,500
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Product details
Overview
HZ7B2J-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 6.9 V to 7.2 V at 0.5 mA test current, 60 Ω dynamic resistance, 400 mW power dissipation, 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 HZ7B2J-E datasheet, HZ7B2J-E pinout, HZ7B2J-E application, or HZ7B2J-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 industrial ambient conditions.
Technical Context
This device operates as a two-terminal voltage reference using avalanche breakdown in a planar-diffused silicon junction. Its low dynamic impedance (60 Ω) and tight zener voltage tolerance support high-accuracy regulation under varying load currents up to 1 mA.
The HZ7B2J-E exhibits a zener voltage temperature coefficient of approximately −0.04 %/°C (−2.8 mV/°C) near 7 V, enabling predictable drift compensation in temperature-sensitive designs. It is rated for DC operation only and requires derating above 25 °C per the published power vs. ambient temperature curve.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.9 V min to 7.2 V max at IZ = 0.5 mA - defines stable regulation window for feedback loop design |
| Dynamic Resistance (rd) | 60 Ω max 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 before thermal shutdown risk |
| Junction Temperature (Tj) | 175 °C max - enables operation in high-temperature industrial environments with appropriate PCB thermal relief |
| Reverse Leakage (IR) | 1 μA max at VR = 2.0 V - guarantees negligible current draw in standby or high-impedance bias networks |
| Package | DO-35 (GRZZ0002ZB-A) - industry-standard axial leaded glass package with orange body and navy blue cathode band |
Pinout & Package
DO-35 glass axial package: hermetically sealed, 2.0 mm diameter body, 26.0 mm overall length, 0.5 mm lead diameter, orange body color, navy blue cathode band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | High-side reference terminal | Connected to regulated output node; polarity must be observed to avoid reverse conduction failure |
| 2 (Anode) | Low-side return terminal | Typically tied to ground or common reference; completes bias path for zener current flow |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise zener operation | Noise level reduced to 1/3–1/10 of standard HZ series - critical for audio preamps and precision ADC references |
| Tight zener voltage tolerance | ±0.3 V over 6.9–7.2 V range at 0.5 mA - reduces need for post-regulation trimming in production |
| Stable temperature coefficient | ≈−0.04 %/°C near 7 V - enables predictable drift modeling in wide-temperature-range instrumentation |
| Low leakage current | ≤1 μA at 2.0 V reverse bias - preserves battery life and avoids loading in high-impedance sensor interfaces |
Applications
| Industrial Power Supply Reference | Audio Signal Chain Biasing |
|---|---|
Use Scenario: Stabilizing feedback voltage in isolated DC-DC converter secondary-side error amplifiers. IC Role / Device Role / Timing Role: Two-terminal voltage reference providing precise 7.0 V setpoint for TL431 or optocoupler-based regulation. Use Value: Low dynamic resistance (60 Ω) minimizes output ripple sensitivity; low noise prevents audible artifacts in adjacent analog stages. |
Use Scenario: Establishing clean DC bias points for JFET-input op-amps and discrete transistor gain stages. IC Role / Device Role / Timing Role: Low-noise voltage reference supplying gate bias to high-impedance amplifier inputs. Use Value: Noise reduction by factor of 3–10 versus legacy HZ diodes prevents hiss amplification in microphone preamplifiers. |
| Medical Sensor Front-End | Automotive Cabin Control Module |
Use Scenario: Providing stable excitation voltage for bridge-based pressure or temperature sensors in portable diagnostic tools. IC Role / Device Role / Timing Role: Precision reference source for ratiometric ADC measurement systems requiring <0.1% long-term stability. Use Value: Tight VZ tolerance (±0.3 V) and low TC enable calibration-free operation across −40 °C to +85 °C ambient. |
Use Scenario: Regulating microcontroller I/O voltage rails and analog sensor inputs in HVAC control units exposed to engine bay heat. IC Role / Device Role / Timing Role: High-reliability zener clamp protecting 5 V logic interfaces from transient overvoltage events. Use Value: 175 °C max junction temperature rating supports uninterrupted operation in under-hood thermal environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4734A | Zener voltage 5.6 V ±5%, 100 Ω rd, 1 W Pd, DO-41 package | Higher power but looser tolerance and higher noise - suitable for non-critical regulation where size is less constrained | Select when higher power margin is needed and noise is not critical; requires PCB footprint change |
| BZX55C6V2 | Zener voltage 6.2 V ±5%, 100 Ω rd, 500 mW Pd, DO-35 package | Lower VZ, wider tolerance, higher noise - acceptable for general-purpose clamping but not precision reference | Choose for cost-sensitive designs where 6.2 V suffices and low-noise performance is not required |
Compared with HZ7B2J-E, the 1N4734A offers higher power but sacrifices noise performance and voltage accuracy, while the BZX55C6V2 matches the DO-35 form factor but lacks the tight tolerance and ultra-low noise essential for metrology-grade references.
Availability
HZ7B2J-E is available at Aetrix Electronics and suitable for industrial power supplies, audio signal conditioning, medical sensor front-ends, and automotive cabin control modules requiring stable component supply with full traceability and lifecycle management.
Supply support for HZ7B2J-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 system-on-chip solutions 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, addressing limitations in noise and temperature drift found in earlier HZ-series Zener diodes.
FAQ
What is the exact zener voltage range for HZ7B2J-E at 0.5 mA test current?
The HZ7B2J-E has a specified zener voltage range of 6.9 V minimum to 7.2 V maximum when tested at IZ = 0.5 mA and Ta = 25 °C. This 0.3 V tolerance band is tighter than standard Zener diodes and supports accurate closed-loop regulation without external trimming. The HZ7B2J-E achieves this via controlled planar diffusion and process optimization unique to the HZ-L Series.
Is HZ7B2J-E suitable for use in high-temperature automotive environments?
Yes, the HZ7B2J-E supports operation up to 175 °C junction temperature and −55 °C to +175 °C storage temperature, making it viable for under-hood automotive applications when mounted on thermally adequate PCBs. Derating is required above 25 °C ambient per the published power vs. temperature curve. The HZ7B2J-E's low temperature coefficient (≈−0.04 %/°C) further enhances stability in cabin control modules.
How does the noise performance of HZ7B2J-E compare to standard Zener diodes?
The HZ7B2J-E delivers approximately one-third to one-tenth the noise level of conventional HZ-series Zener diodes due to optimized silicon planar structure and low-leakage junction design. This reduction is verified in low-frequency (<10 kHz) spectral analysis and directly improves signal-to-noise ratio in audio preamplifiers and precision sensor interfaces where the HZ7B2J-E serves as a reference.
What is the cathode identification method for HZ7B2J-E?
The HZ7B2J-E uses a navy blue cathode band located on the orange-colored DO-35 glass body to identify the cathode terminal (Pin 1). This marking is consistent across all HZ-L Series devices and aligns with JEITA standard GRZZ0002ZB-A packaging. Correct orientation is essential: reverse connection will prevent proper zener conduction and may cause irreversible damage under bias.
Can HZ7B2J-E replace older HZ7B2L diodes in existing designs?
Yes, the HZ7B2J-E is a direct functional and mechanical replacement for HZ7B2L, sharing identical DO-35 package dimensions, pinout, zener voltage range (6.9–7.2 V), and electrical specifications. The "J" suffix denotes updated process qualification per Renesas' internal reliability standards, with no layout or schematic changes required when migrating from HZ7B2L to HZ7B2J-E.
HZ7B2J-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:
- -
HZ7B2J-E FAQ
1.How can I place an order for HZ7B2J-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZ7B2J-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 HZ7B2J-E reliable?
The price and inventory of HZ7B2J-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZ7B2J-E is usually 5 days.
3.What payment methods are accepted for HZ7B2J-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZ7B2J-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZ7B2J-E?
HZ7B2J-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZ7B2J-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 HZ7B2J-E?
For technical support, including HZ7B2J-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZ7B2J-E requirements.
6.How does Aetrix verify that HZ7B2J-E is sourced from the original manufacturer or authorized distributors?
All HZ7B2J-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 HZ7B2J-E meets industry standards.
7.What is the process for return or replacement of HZ7B2J-E?
All HZ7B2J-E units undergo pre-shipment inspection (PSI). If there is an issue with HZ7B2J-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 HZ7B2J-E part is unused and in its original packaging.
Return procedure for HZ7B2J-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HZ7B2J-E Tags
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