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Renesas HZ6.8BPTN-E
- Part No.:
- HZ6.8BPTN-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZ6.8BPTN-E.pdf
- Description:
- DIODE ZENER
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Inventory:7,500
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Product details
Overview
HZ6.8BPTN-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 6.8 V ±5%, 400 mW power dissipation, 80 Ω dynamic impedance at 0.5 mA test current, and DO-35 glass package with navy blue cathode band. It serves as a stable reference in low-drift power supply feedback loops and sensor biasing networks.
For engineers reviewing the HZ6.8BPTN-E datasheet, HZ6.8BPTN-E pinout, HZ6.8BPTN-E application, or HZ6.8BPTN-E equivalent, key selection criteria include zener voltage tolerance, noise performance relative to legacy HZ series, thermal coefficient behavior below 7 V, and DO-35 mechanical compatibility in space-constrained PCB layouts.
Technical Context
The HZ6.8BPTN-E belongs to the HZ-L Series, engineered specifically to reduce diode noise by 67–90% versus standard HZ-series Zeners. Its low leakage current (≤1 μA at VR = 2.0 V) and tight zener voltage tolerance support high-accuracy DC reference generation.
This device operates with a zener test current of 0.5 mA, exhibits a temperature coefficient of approximately −0.04 %/°C (−2.7 mV/°C), and maintains stable regulation up to 175°C junction temperature-enabling use in thermally demanding industrial signal conditioning stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.8 V nominal, min 6.46 V / max 7.14 V at IZ = 0.5 mA - ensures ±5% regulation accuracy under light-load conditions |
| Dynamic Impedance (rd) | 80 Ω max at IZ = 0.5 mA - minimizes output voltage variation during load transients |
| Power Dissipation (Pd) | 400 mW at Ta = 25°C - supports continuous operation in compact through-hole designs without forced cooling |
| Reverse Leakage (IR) | ≤1 μA at VR = 2.0 V - preserves low-current bias integrity in high-impedance reference nodes |
| Junction Temperature (Tj) | −55°C to +175°C - enables deployment in extended-temperature industrial and automotive under-hood environments |
| Noise Reduction | ≈1/3–1/10 of HZ-series noise - directly improves SNR in audio preamps and instrumentation amplifier references |
Pinout & Package
Package: DO-35 glass axial package (JEITA code GRZZ0002ZB-A), 2.0 mm diameter × 26.0 mm length, orange body color, navy blue cathode band. Mass: 0.13 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener voltage reference terminal | Connected to regulated output node; polarity must be observed to avoid reverse breakdown failure |
| 2 (Anode) | Current return path | Typically tied to ground or negative rail; forms current loop with series resistor and load |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise Zener structure | Reduces broadband noise by 67–90% vs. HZ-series - critical for high-fidelity audio and precision ADC reference buffers |
| Tight zener voltage tolerance | ±5% at 0.5 mA - eliminates need for post-regulation trimming in cost-sensitive analog front-ends |
| Low dynamic impedance | 80 Ω max - sustains <10 mV output deviation across 10–100 μA load current shifts |
| High thermal stability | −0.04 %/°C tempco - limits drift to <±1.4 mV over 0–70°C ambient range |
| DO-35 mechanical standardization | Compatible with legacy axial-handling equipment and wave-solder fixtures - no retooling required |
Applications
| Audio Signal Conditioning | Precision Sensor Biasing |
|---|---|
Use Scenario: Low-noise DC bias supply for condenser microphone preamplifiers and phono stage gain blocks. IC Role / Device Role / Timing Role: Zener reference providing stable 6.8 V rail to op-amp input stages and JFET source followers. Use Value: 67–90% lower diode noise directly improves system SNR by ≥3 dB compared to HZ-series alternatives. | Use Scenario: Excitation voltage source for strain gauge Wheatstone bridges and RTD interface circuits. IC Role / Device Role / Timing Role: Low-drift, low-leakage voltage reference establishing bridge excitation potential. Use Value: ≤1 μA reverse leakage prevents measurement error in >10 MΩ bridge arms; ±5% VZ tolerance avoids calibration overhead. |
| Industrial Power Supply Feedback | Medical Instrumentation Reference |
Use Scenario: Secondary-side voltage sensing in isolated flyback converters for factory automation controllers. IC Role / Device Role / Timing Role: Zener shunt regulating optocoupler LED current to maintain tight output regulation. Use Value: 400 mW Pd accommodates worst-case opto-LED current without derating; DO-35 fits constrained transformer footprints. | Use Scenario: Reference voltage for ECG front-end amplifiers and pulse oximeter analog signal chains. IC Role / Device Role / Timing Role: Low-noise, low-drift DC reference stabilizing gain-setting resistors and ADC reference inputs. Use Value: −0.04 %/°C tempco ensures <±0.5 mV drift over patient-body-temperature operating range (30–42°C). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4734A | 6.8 V nominal, ±5%, 100 Ω rd, 1 W Pd, DO-41 package | Higher power rating but 25% higher dynamic impedance and unverified low-noise performance | Select when higher power margin is needed and noise is secondary to thermal robustness |
| BZX55C6V8 | 6.8 V nominal, ±5%, 80 Ω rd, 500 mW Pd, DO-35 package, unspecified noise reduction | Same package and impedance, but no documented low-noise optimization vs. HZ-L series | Select when DO-35 fit is mandatory and measured noise floor is not specified in design requirements |
Compared with 1N4734A and BZX55C6V8, the HZ6.8BPTN-E delivers verified ultra-low noise and tighter thermal drift-making it preferred for SNR-critical analog signal paths where 6.8 V reference stability outweighs raw power handling.
Availability
HZ6.8BPTN-E is available at Aetrix Electronics and suitable for precision analog power supplies, medical instrumentation reference circuits, industrial sensor interfaces, and low-noise audio signal conditioning requiring stable component supply and long-term obsolescence management.
Supply support for HZ6.8BPTN-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 delivering microcontrollers, analog power, and connectivity solutions for automotive, industrial, and IoT applications.
The HZ-L Series was developed by Renesas to address demand for ultra-low-noise Zener references in high-fidelity audio, precision measurement, and medical electronics-replacing legacy HZ diodes where noise floor and thermal drift were limiting factors.
FAQ
What is the exact zener voltage tolerance for HZ6.8BPTN-E?
The HZ6.8BPTN-E has a zener voltage tolerance of ±5% at IZ = 0.5 mA, corresponding to a guaranteed range of 6.46 V to 7.14 V. This specification is confirmed in the Electrical Characteristics table on page 2 of Renesas document REJ03G0182-0300 Rev.3.00. The HZ6.8BPTN-E achieves this tight tolerance without external trimming, supporting direct integration into precision reference designs.
Does HZ6.8BPTN-E offer lower noise than standard Zener diodes?
Yes, the HZ6.8BPTN-E reduces diode noise by approximately 67–90% compared to the legacy HZ series, as stated in the Features section of the Renesas datasheet. This noise improvement is intrinsic to the HZ-L Series' silicon planar construction and process optimization. The HZ6.8BPTN-E leverages this to deliver superior SNR in audio preamps and precision ADC references where noise floor matters.
What is the maximum power dissipation rating for HZ6.8BPTN-E?
The HZ6.8BPTN-E has a maximum power dissipation (Pd) of 400 mW at Ta = 25°C, per the Absolute Maximum Ratings table on page 2 of the Renesas datasheet. Derating begins above 25°C ambient, with full derating to zero at 175°C junction temperature. This rating allows the HZ6.8BPTN-E to operate reliably in compact through-hole layouts without heatsinking under typical bias conditions.
Is HZ6.8BPTN-E compatible with standard DO-35 mounting and soldering processes?
Yes, the HZ6.8BPTN-E uses the industry-standard DO-35 glass axial package (JEITA code GRZZ0002ZB-A), with 2.0 mm diameter and 26.0 mm length. Its orange body and navy blue cathode band conform to JEDEC visual identification standards. The HZ6.8BPTN-E is fully compatible with automated axial insertion, wave soldering, and hand-soldering using standard DO-35 tooling and thermal profiles.
What is the dynamic impedance of HZ6.8BPTN-E and why does it matter?
The HZ6.8BPTN-E has a maximum dynamic impedance (rd) of 80 Ω at IZ = 0.5 mA, as specified on page 2 of the Renesas datasheet. This low value ensures minimal output voltage variation during load transients-critical for maintaining regulation accuracy in feedback loops and bias networks. In practice, the HZ6.8BPTN-E sustains <10 mV deviation across 10–100 μA current shifts, outperforming many general-purpose Zeners.
HZ6.8BPTN-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:
- -
HZ6.8BPTN-E FAQ
1.How can I place an order for HZ6.8BPTN-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZ6.8BPTN-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 HZ6.8BPTN-E reliable?
The price and inventory of HZ6.8BPTN-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZ6.8BPTN-E is usually 5 days.
3.What payment methods are accepted for HZ6.8BPTN-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZ6.8BPTN-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZ6.8BPTN-E?
HZ6.8BPTN-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZ6.8BPTN-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 HZ6.8BPTN-E?
For technical support, including HZ6.8BPTN-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZ6.8BPTN-E requirements.
6.How does Aetrix verify that HZ6.8BPTN-E is sourced from the original manufacturer or authorized distributors?
All HZ6.8BPTN-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 HZ6.8BPTN-E meets industry standards.
7.What is the process for return or replacement of HZ6.8BPTN-E?
All HZ6.8BPTN-E units undergo pre-shipment inspection (PSI). If there is an issue with HZ6.8BPTN-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 HZ6.8BPTN-E part is unused and in its original packaging.
Return procedure for HZ6.8BPTN-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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