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Renesas HZ6.8CP-E
- Part No.:
- HZ6.8CP-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZ6.8CP-E.pdf
- Description:
- DIODE ZENER
- Quantity:
- Payment:
- Shipping:
Inventory:7,300
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Product details
Overview
HZ6.8CP-E from Renesas is a silicon epitaxial planar Zener diode designed for precision voltage regulation and overvoltage clamping in DC power rails and reference circuits. It delivers a nominal zener voltage of 6.8 V (min 6.4 V, max 7.2 V) at 20 mA test current, with dynamic resistance of 3.5 Ω, 1.0 W power dissipation, and DO-41 glass package for high reliability in industrial power supplies.
For engineers reviewing the HZ6.8CP-E datasheet, HZ6.8CP-E pinout, HZ6.8CP-E application, or HZ6.8CP-E equivalent, key selection criteria include its 6.8 V ±0.4 V tolerance at 20 mA, low 3.5 Ω impedance, −55°C to +175°C operating range, and DO-41 cathode-band polarity - critical for stable voltage reference and transient suppression designs.
Technical Context
The HZ6.8CP-E operates as a two-terminal, reverse-biased voltage reference device with a specified zener breakdown mechanism. Its electrical behavior is defined under DC test conditions at 25°C, with guaranteed VZ = 6.4–7.2 V at IZ = 20 mA and maximum reverse current IR = 20 µA at VR = 4.0 V.
Thermal performance is characterized by junction temperature limits up to 175°C and ambient derating curves showing 1.0 W dissipation at Ta = 25°C, dropping to zero at ~125°C with no heatsink. Temperature coefficient is not specified for HZ6.8CP-E individually but falls within the −0.02 to +0.08 mV/°C range typical for 6–8 V Zeners in the HZ-P series.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.4–7.2 V at IZ = 20 mA - defines stable regulation point for feedback or clamp circuits |
| Dynamic Resistance (rd) | 3.5 Ω max at IZ = 20 mA - determines output impedance and load regulation sensitivity |
| Power Dissipation (Pd) | 1.0 W at Ta = 25°C - sets maximum continuous DC power handling without heatsink |
| Reverse Current (IR) | 20 µA max at VR = 4.0 V - ensures low leakage below breakdown threshold |
| Junction Temperature (Tj) | −55°C to +175°C - supports operation in harsh industrial and automotive under-hood environments |
| Package | DO-41 glass body - provides hermetic sealing, high insulation resistance, and long-term stability |
Pinout & Package
DO-41 axial glass package with cathode identified by a painted band. Leads are tinned copper-clad steel, suitable for wave or hand soldering. Body diameter: Ø3.0 mm; length: 26.0 mm min; mass: 0.38 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated voltage node; reverse-biased terminal during normal operation |
| 2 (Non-banded End) | Anode | Connected to ground or lower-potential rail; completes bias path for zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| Wide VZ spectrum (1.88–40 V) | Enables single-family sourcing across diverse voltage reference needs without redesign |
| DO-41 glass package | Delivers >1000-hour humidity resistance and <100 ppm/°C long-term drift in stable environments |
| 1.0 W power rating | Supports direct replacement of lower-power Zeners (e.g., ½W types) without thermal redesign |
| Low dynamic resistance (3.5 Ω) | Minimizes output voltage shift under varying load currents in shunt regulator topologies |
Applications
| Industrial Power Supply Reference | Overvoltage Clamp for Microcontroller I/O |
|---|---|
Use Scenario: Stabilizing feedback voltage in isolated flyback or buck converter secondary-side regulation. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 6.8 V setpoint to optocoupler or TL431 control loop. Use Value: Maintains ±1% output accuracy over line/load transients due to tight VZ tolerance and low rd. | Use Scenario: Protecting 5 V or 3.3 V GPIO pins from ESD or supply rail overshoot. IC Role / Device Role / Timing Role: Fast-acting clamp limiting voltage to ≤7.2 V before damage thresholds of MCU input structures. Use Value: Responds within nanoseconds to transients up to 1.0 W surge, preventing latch-up or gate oxide rupture. |
| DC Motor Driver Voltage Monitor | Automotive Sensor Signal Conditioning |
Use Scenario: Monitoring battery-fed H-bridge supply rails for undervoltage lockout or overvoltage shutdown. IC Role / Device Role / Timing Role: Zener-based comparator reference enabling discrete UVLO/OVLO detection at 6.8 V threshold. Use Value: Operates reliably from −40°C to +125°C ambient with minimal TC-induced drift in threshold voltage. | Use Scenario: Biasing and stabilizing bridge sensor excitation in automotive pressure or temperature modules. IC Role / Device Role / Timing Role: Providing stable 6.8 V excitation source for Wheatstone bridges requiring low-noise, low-drift references. Use Value: Glass DO-41 construction withstands automotive vibration and thermal cycling better than plastic-packaged alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4734A | VZ = 5.6 V (±5%), rd = 5 Ω, Pd = 1.0 W, DO-41 | Lower nominal voltage; higher dynamic resistance reduces regulation precision | Select when 5.6 V reference is acceptable and tighter VZ tolerance is not required |
| BZX55C6V8 | VZ = 6.8 V (±5%), rd = 10 Ω, Pd = 0.5 W, DO-35 | Half the power rating and double the impedance; smaller DO-35 package limits thermal margin | Use only in low-power signal-level clamping where 0.5 W derating is sufficient |
Compared with 1N4734A and BZX55C6V8, the HZ6.8CP-E offers superior voltage accuracy (±0.4 V vs. ±5%), lower impedance (3.5 Ω vs. ≥5 Ω), and full 1.0 W capability in DO-41 - making it optimal for industrial power regulation where stability and thermal headroom are critical.
Availability
HZ6.8CP-E is available at Aetrix Electronics and suitable for industrial power supplies, automotive sensor modules, and DC motor control systems requiring stable component supply and long-lifecycle support.
Supply support for HZ6.8CP-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 Technology Corp. (now part of Renesas Electronics Corporation) is a Japanese semiconductor manufacturer specializing in microcontrollers, analog, and power devices for industrial, automotive, and infrastructure markets.
The HZ-P Series was developed specifically for high-reliability voltage reference and clamping in industrial power conversion and protection circuits, emphasizing DO-41 robustness, wide VZ coverage, and extended temperature operation.
FAQ
What is the exact zener voltage range for HZ6.8CP-E at 20 mA?
The HZ6.8CP-E has a guaranteed zener voltage range of 6.4 V to 7.2 V when tested at IZ = 20 mA and Ta = 25°C. This ±0.4 V tolerance reflects the CP grade specification per the HZ-P Series datasheet Rev.6.00. The nominal value is 6.8 V, and this range ensures predictable clamping or reference behavior in production designs using HZ6.8CP-E.
Is HZ6.8CP-E compatible with standard DO-41 footprint layouts?
Yes, HZ6.8CP-E uses the industry-standard DO-41 axial package with 3.0 mm body diameter and 26.0 mm minimum length, matching JEDEC and JEITA mechanical specifications. Its lead spacing and dimensions are identical to other DO-41 Zeners like 1N47xx and BZX55, allowing direct placement in existing footprints without PCB modification when using HZ6.8CP-E.
What is the maximum reverse current for HZ6.8CP-E below its zener knee?
The maximum reverse current (IR) for HZ6.8CP-E is 20 µA at VR = 4.0 V, measured at Ta = 25°C. This low leakage ensures minimal quiescent power loss in standby or high-impedance reference configurations and supports accurate threshold detection in comparator circuits using HZ6.8CP-E as a reference element.
Can HZ6.8CP-E be used in automotive under-hood applications?
Yes, HZ6.8CP-E is rated for junction temperatures up to +175°C and storage from −55°C to +175°C. Its DO-41 glass package provides superior moisture resistance and thermal cycling endurance compared to plastic packages. While not AEC-Q200 qualified, its intrinsic reliability makes HZ6.8CP-E suitable for non-safety-critical automotive under-hood functions such as sensor biasing or supply monitoring.
How does the dynamic resistance of HZ6.8CP-E affect voltage regulation performance?
The dynamic resistance of HZ6.8CP-E is specified at 3.5 Ω maximum at IZ = 20 mA. This low value means that for every 1 mA change in zener current, the output voltage shifts by less than 3.5 mV - directly improving load regulation and ripple rejection in shunt reference or clamp applications using HZ6.8CP-E.
HZ6.8CP-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:
- -
HZ6.8CP-E FAQ
1.How can I place an order for HZ6.8CP-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZ6.8CP-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 HZ6.8CP-E reliable?
The price and inventory of HZ6.8CP-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZ6.8CP-E is usually 5 days.
3.What payment methods are accepted for HZ6.8CP-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZ6.8CP-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZ6.8CP-E?
HZ6.8CP-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZ6.8CP-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 HZ6.8CP-E?
For technical support, including HZ6.8CP-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZ6.8CP-E requirements.
6.How does Aetrix verify that HZ6.8CP-E is sourced from the original manufacturer or authorized distributors?
All HZ6.8CP-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 HZ6.8CP-E meets industry standards.
7.What is the process for return or replacement of HZ6.8CP-E?
All HZ6.8CP-E units undergo pre-shipment inspection (PSI). If there is an issue with HZ6.8CP-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 HZ6.8CP-E part is unused and in its original packaging.
Return procedure for HZ6.8CP-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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