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Renesas HZ6.8BPTK-E
- Part No.:
- HZ6.8BPTK-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZ6.8BPTK-E.pdf
- Description:
- DIODE ZENER
- Quantity:
- Payment:
- Shipping:
Inventory:65,000
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Product details
Overview
HZ6.8BPTK-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, 400 mW power dissipation, and dynamic resistance of 80 Ω at 0.5 mA test current - deployed in reference voltage generation for ADCs and sensor signal conditioning.
For engineers reviewing the HZ6.8BPTK-E datasheet, HZ6.8BPTK-E pinout, HZ6.8BPTK-E application, or HZ6.8BPTK-E equivalent, key selection criteria include zener voltage tolerance (±0.3 V), low noise performance (1/3–1/10 that of standard HZ series), temperature coefficient (−0.04 %/°C), DO-35 package compatibility, and suitability for low-current stabilized bias networks.
Technical Context
The HZ6.8BPTK-E operates as a two-terminal shunt regulator with cathode-anode polarity, designed for DC-biased operation only per specification. Its low dynamic impedance (80 Ω) and tight zener voltage range (6.5 V to 7.1 V) enable stable reference generation under low-quiescent-current conditions (IZ = 0.5 mA).
It exhibits a negative temperature coefficient of −0.04 %/°C, aligning with mid-voltage Zener devices optimized for thermal stability in ambient ranges from −55°C to +175°C. Junction temperature rating of 175°C supports use in thermally constrained PCB layouts without forced cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.5 V min to 7.1 V max at IZ = 0.5 mA - ensures ±0.3 V tolerance for precision 6.8 V reference design |
| Power Dissipation (Pd) | 400 mW at Ta = 25°C - supports continuous operation in compact through-hole layouts without heatsinking |
| Dynamic Resistance (rd) | 80 Ω max at IZ = 0.5 mA - minimizes output voltage variation under load transients in feedback networks |
| Reverse Current (IR) | 1 μA max at VR = 2.0 V - reduces leakage-induced error in high-impedance bias chains |
| Temperature Coefficient (γZ) | −0.04 %/°C - enables predictable drift compensation in temperature-sensitive instrumentation |
| Junction Temperature (Tj) | 175°C maximum - allows reliable operation in industrial control enclosures with elevated ambient temperatures |
Pinout & Package
Package: DO-35 glass axial lead package (JEITA code GRZZ0002ZB-A), orange body color, navy blue cathode band. Dimensions per SC-40 standard: φD = 2.0 mm, L = 26.0 mm, E = 4.2 mm, mass ≈ 0.13 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Regulated output node | Connected to positive rail; sinks current to maintain stable VZ across load |
| 2 (Anode) | Reference ground node | Connected to circuit common; completes shunt regulation path with series resistor |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise Zener operation | Diode noise level ~1/3–1/10 that of standard HZ series - critical for audio preamps and precision sensor front-ends |
| Tight zener voltage tolerance | ±0.3 V at 6.8 V nominal - eliminates need for post-regulation trimming in factory-calibrated systems |
| Low dynamic impedance | 80 Ω max at 0.5 mA - improves line and load regulation in low-power reference designs |
| High thermal robustness | 175°C max junction temperature - enables deployment in automotive engine-control modules and industrial PLCs |
Applications
| Instrumentation Reference | ADC Bias Network |
|---|---|
Use Scenario: Providing stable 6.8 V reference for 16-bit SAR ADCs in portable data loggers. IC Role / Device Role / Timing Role: Shunt voltage reference establishing precise input full-scale range. Use Value: Low dynamic resistance (80 Ω) and low noise ensure <0.5 LSB integral nonlinearity error over temperature. | Use Scenario: Generating clean bias voltage for op-amp input stages in medical ECG front-ends. IC Role / Device Role / Timing Role: Low-leakage (1 μA max) Zener source for high-impedance differential amplifiers. Use Value: Sub-μA reverse current prevents input offset drift in femtoampere-level current-sensing paths. |
| Sensor Signal Conditioning | Industrial Power Monitor |
Use Scenario: Supplying regulated excitation voltage to strain-gauge Wheatstone bridges in load cells. IC Role / Device Role / Timing Role: Precision voltage source maintaining bridge balance accuracy under varying ambient conditions. Use Value: −0.04 %/°C tempco limits bridge output drift to <±0.05% FS over −40°C to +85°C. | Use Scenario: Stabilizing auxiliary supply for microcontroller-based power quality analyzers in switchgear cabinets. IC Role / Device Role / Timing Role: Primary shunt regulator in unregulated 12 V DC input stage. Use Value: 400 mW rating supports continuous operation at 85°C ambient without derating or airflow. |
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 |
|---|---|---|---|
| 1N4734A | Zener voltage 5.6 V (not 6.8 V); rd = 9 Ω at 45 mA; higher test current shifts operating point | Designed for higher-current regulation; unsuitable for low-IZ precision references | Select only if system requires 5.6 V and can support ≥45 mA bias current |
| BZX55C6V8 | Same 6.8 V nominal, but rd = 35 Ω at 5 mA; wider VZ tolerance (±5% = ±0.34 V); no published noise spec | General-purpose use; lacks documented low-noise optimization for sensitive analog stages | Acceptable for non-critical references where cost outweighs noise and tempco requirements |
Compared with 1N4734A and BZX55C6V8, the HZ6.8BPTK-E delivers tighter voltage tolerance at low bias current, lower noise, and superior thermal stability - making it the preferred choice for metrology-grade references where 6.8 V accuracy and drift control are mandatory.
Availability
HZ6.8BPTK-E is available at Aetrix Electronics and suitable for precision instrumentation, medical sensor interfaces, industrial power monitoring, and test equipment requiring stable component supply with guaranteed long-term sourcing.
Supply support for HZ6.8BPTK-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 Zener diodes were developed specifically for low-noise, high-stability voltage reference applications in precision analog signal chains - targeting instrumentation, sensor conditioning, and metrology systems where conventional Zeners introduce unacceptable noise or drift.
FAQ
What is the exact zener voltage range specified for HZ6.8BPTK-E?
The HZ6.8BPTK-E has a guaranteed zener voltage range of 6.5 V minimum to 7.1 V maximum when tested at IZ = 0.5 mA and Ta = 25°C. This ±0.3 V window reflects its tight tolerance design for precision reference use, distinct from broader-tolerance Zeners like the BZX55 series. The HZ6.8BPTK-E datasheet confirms this range on page 2 of REJ03G0182-0300 Rev.3.00.
Is HZ6.8BPTK-E suitable for AC-coupled or high-frequency applications?
No - the HZ6.8BPTK-E is rated for DC operation only, as explicitly stated in Note 1 on pages 2 and 3 of its datasheet. It is not characterized for dynamic impedance or noise performance under AC or switching conditions. For HZ6.8BPTK-E, use is restricted to steady-state DC bias and reference generation; RF or pulse applications require alternative devices with AC-rated specifications.
What is the cathode identification method for HZ6.8BPTK-E?
The HZ6.8BPTK-E uses a navy blue cathode band located near one end of its orange-colored DO-35 glass body. Pin 1 (cathode) is the terminal adjacent to this band; Pin 2 (anode) is the opposite lead. This marking conforms to JEITA standard GRZZ0002ZB-A and is visible in the "Pin Arrangement" diagram on page 1 of REJ03G0182-0300.
Does HZ6.8BPTK-E have a specified noise voltage spectral density?
The HZ6.8BPTK-E datasheet does not publish numerical noise voltage spectral density (e.g., nV/√Hz), but states its noise level is "approximately 1/3–1/10 lower than the HZ series" - a relative benchmark confirmed in the Features section on page 1. This comparative claim is based on standardized low-frequency noise measurement methodology per Renesas internal characterization, supporting its use in ultra-low-noise analog stages where HZ-series diodes proved inadequate.
Can HZ6.8BPTK-E replace standard 6.8 V Zeners in existing DO-35 footprints?
Yes - the HZ6.8BPTK-E uses the standard DO-35 package (JEITA code GRZZ0002ZB-A) with identical mechanical dimensions (φD = 2.0 mm, L = 26.0 mm) and lead spacing as legacy 6.8 V Zeners. Its cathode band orientation and axial lead configuration match industry-standard DO-35 placement, enabling direct physical replacement without PCB modification - provided the circuit operates within its 0.5 mA test current and 400 mW power limits.
HZ6.8BPTK-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:
- -
HZ6.8BPTK-E FAQ
1.How can I place an order for HZ6.8BPTK-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZ6.8BPTK-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 HZ6.8BPTK-E reliable?
The price and inventory of HZ6.8BPTK-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZ6.8BPTK-E is usually 5 days.
3.What payment methods are accepted for HZ6.8BPTK-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZ6.8BPTK-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZ6.8BPTK-E?
HZ6.8BPTK-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZ6.8BPTK-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 HZ6.8BPTK-E?
For technical support, including HZ6.8BPTK-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZ6.8BPTK-E requirements.
6.How does Aetrix verify that HZ6.8BPTK-E is sourced from the original manufacturer or authorized distributors?
All HZ6.8BPTK-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 HZ6.8BPTK-E meets industry standards.
7.What is the process for return or replacement of HZ6.8BPTK-E?
All HZ6.8BPTK-E units undergo pre-shipment inspection (PSI). If there is an issue with HZ6.8BPTK-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 HZ6.8BPTK-E part is unused and in its original packaging.
Return procedure for HZ6.8BPTK-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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