My Inquiry
My Account
Renesas HZ7HC1
- Part No.:
- HZ7HC1
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZ7HC1.pdf
- Description:
- DIODE ZENER
- Quantity:
- Payment:
- Shipping:
Inventory:10,589
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
HZ7HC1 from Renesas Electronics is a silicon planar Zener diode designed for precision voltage regulation in low-power stabilized power supplies. It delivers a nominal zener voltage of 7.5 V to 7.9 V at 5 mA test current, with dynamic resistance of 3.5 Ω, maximum power dissipation of 500 mW, and operates within −55°C to +175°C storage temperature range. It is commonly used in reference voltage generation for analog sensor interfaces and microcontroller reset circuits.
For engineers reviewing the HZ7HC1 datasheet, HZ7HC1 pinout, HZ7HC1 application, or HZ7HC1 equivalent, key selection criteria include its DO-35 package compatibility, low zener impedance, tight VZ tolerance (±0.4 V), temperature coefficient behavior near zero crossing (~0 mV/°C at ~7.5 V), and suitability for space-constrained industrial control modules requiring stable DC biasing.
Technical Context
The HZ7HC1 employs a silicon planar junction structure optimized for low leakage and stable breakdown characteristics under DC bias. Its zener voltage is specified at IZ = 5 mA with reverse current limited to 1 µA at VR = 0.5 V, ensuring minimal standby power draw in voltage reference paths.
Thermal performance is defined by a maximum junction temperature of 175°C and a power derating curve that reduces allowable dissipation linearly above 25°C ambient - e.g., ~350 mW at 70°C ambient. The device exhibits a zener voltage temperature coefficient near 0 mV/°C in the 7–8 V range, minimizing drift in precision references.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 7.5 V to 7.9 V at IZ = 5 mA - defines stable regulation point for low-noise analog references. |
| Dynamic Resistance (rd) | 3.5 Ω max at IZ = 5 mA - ensures minimal output voltage variation under load transients. |
| Power Dissipation (Pd) | 500 mW max at Ta = 25°C - supports continuous operation in compact PCB layouts without forced cooling. |
| Reverse Current (IR) | 1 µA max at VR = 0.5 V - enables ultra-low quiescent current in battery-backed circuits. |
| Junction Temperature (Tj) | 175°C max - allows reliable operation in high-temperature industrial environments (e.g., motor drive control boards). |
| Package | DO-35 (JEITA SC-40) - industry-standard glass axial leaded package with cathode band marking, compatible with wave soldering and manual assembly. |
Pinout & Package
Package: DO-35 glass axial package (Renesas code GRZZ0002ZB-A), 2.0 mm diameter × 26.0 mm length, 0.13 g typical mass, cathode identified by navy-blue band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener breakdown terminal | Connected to regulated positive rail; reverse-biased operation requires this terminal at higher potential than anode. |
| 2 (Anode) | Reference ground node | Tied to circuit common or system ground; establishes reference potential for VZ drop across external series resistor. |
Key Features
| Feature | Design Value |
|---|---|
| Low zener impedance | 3.5 Ω max enables <10 mV output shift under ±1 mA load change - critical for ADC reference stability. |
| Tight VZ tolerance | ±0.4 V over grade C3 ensures predictable regulation without post-production trimming in cost-sensitive designs. |
| Negligible tempco near 7.5 V | ~0 mV/°C at nominal VZ minimizes thermal drift in unheated enclosures (e.g., HVAC sensor nodes). |
| High reliability glass package | DO-35 construction provides hermetic seal and proven long-term stability in humid industrial environments. |
| Low leakage current | 1 µA max at 0.5 V reverse bias reduces error contribution in high-impedance feedback networks. |
Applications
| Industrial Sensor Signal Conditioning | Microcontroller Reset Circuitry |
|---|---|
|
Use Scenario: Providing stable 7.5 V reference for bridge amplifier biasing in pressure transducer modules. IC Role / Device Role / Timing Role: Zener diode acts as shunt voltage reference, setting common-mode voltage for instrumentation amplifier input stage. Use Value: Low rd and near-zero tempco maintain reference accuracy within ±0.5% over −40°C to +85°C operating range. |
Use Scenario: Generating clean 7.5 V threshold for RC-based power-on reset (POR) in 8-bit MCU systems. IC Role / Device Role / Timing Role: Zener clamps capacitor charging voltage to precise trip point for reset IC input. Use Value: Tight VZ tolerance eliminates need for external trim pot, reducing BOM count and calibration steps. |
| Programmable Logic Controller (PLC) Analog Input Module | DC-DC Converter Feedback Network |
|
Use Scenario: Biasing op-amp rails in isolated 4–20 mA transmitter front-end circuits. IC Role / Device Role / Timing Role: Provides stable mid-rail reference for single-supply signal conditioning stages. Use Value: 500 mW rating supports continuous operation under 12 V supply with 1 kΩ series resistor. |
Use Scenario: Setting output voltage in adjustable flyback converter using TL431-like topology. IC Role / Device Role / Timing Role: Serves as primary voltage sense element in optocoupler feedback loop. Use Value: Low leakage prevents reference error accumulation during light-load conditions (<100 µA). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX55C7V5 (ON Semiconductor) | VZ = 7.5 V ±5%, rd = 15 Ω max, Pd = 500 mW, DO-35 package | Higher dynamic resistance increases sensitivity to load variation; wider VZ tolerance requires tighter external filtering. | Select when cost is prioritized over regulation precision and thermal stability is secondary. |
| 1N4733A (STMicroelectronics) | VZ = 5.1 V nominal, not directly voltage-matched; rd = 17 Ω, Pd = 1 W, DO-41 package | Requires redesign of series resistor and layout due to different VZ and larger DO-41 footprint. | Consider only if 5.1 V reference suffices and higher power margin is needed; not a drop-in replacement. |
Compared with BZX55C7V5 and 1N4733A, the HZ7HC1 offers superior voltage stability (tighter VZ grade C3), lower dynamic resistance for improved line regulation, and optimized temperature coefficient near 7.5 V - making it preferred for precision analog reference and reset applications where board space and thermal drift are constrained.
Availability
HZ7HC1 is available at Aetrix Electronics and suitable for industrial sensor interfaces, PLC analog input modules, and microcontroller reset circuits requiring stable component supply and long-lifecycle support.
Supply support for HZ7HC1 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 Corporation is a global semiconductor leader specializing in microcontrollers, analog, and power devices for industrial, automotive, and infrastructure markets.
The HZ(H) Series Zener diodes were developed for high-stability DC voltage regulation in resource-constrained embedded systems, emphasizing low leakage, tight tolerance, and robust thermal performance in standard axial packages.
FAQ
What is the exact zener voltage range for HZ7HC1 at 5 mA test current?
The HZ7HC1 has a guaranteed zener voltage range of 7.5 V to 7.9 V when tested at IZ = 5 mA and Ta = 25°C. This C3-grade specification reflects ±0.4 V tolerance around the nominal 7.7 V center point, enabling predictable regulation without post-assembly calibration in production systems using the HZ7HC1.
Does HZ7HC1 support operation at elevated ambient temperatures?
Yes, the HZ7HC1 is rated for storage from −55°C to +175°C and maintains functional regulation up to its maximum junction temperature of 175°C. Derating follows a linear curve: at 70°C ambient, usable power drops to ~350 mW. This makes the HZ7HC1 suitable for under-hood automotive modules or enclosed industrial drives where ambient exceeds 60°C.
What is the significance of the "C3" suffix in HZ7HC1?
The "C3" in HZ7HC1 denotes the zener voltage grade per Renesas' HZ(H) Series classification - specifically, the third tolerance band within the 7 V group (7.5–7.9 V). It distinguishes HZ7HC1 from broader-tolerance variants like HZ7HB2 (7.0–7.4 V) and confirms its use in applications demanding tighter regulation, such as precision ADC references where the HZ7HC1's ±0.4 V window directly impacts measurement repeatability.
Can HZ7HC1 be used in place of a 7.5 V Zener diode with ±5% tolerance?
Yes - but with design benefit. While a ±5% 7.5 V Zener (e.g., 7.13–7.88 V) overlaps the HZ7HC1's 7.5–7.9 V range, the HZ7HC1's tighter ±0.4 V absolute tolerance and lower 3.5 Ω dynamic resistance provide superior regulation accuracy and transient response. When replacing such parts, verify series resistor value remains appropriate for the HZ7HC1's exact VZ center and reduced rd.
Is the DO-35 package of HZ7HC1 compatible with automated pick-and-place assembly?
The DO-35 package used by HZ7HC1 is not compatible with standard SMT pick-and-place equipment due to its axial lead configuration and glass body. It is intended for through-hole insertion, wave soldering, or hand assembly. For automated production, consider surface-mount alternatives like the NZ9F7V5 (SOD-123) - though these differ in thermal performance and regulation specs from the HZ7HC1.
HZ7HC1 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:
- -
HZ7HC1 FAQ
1.How can I place an order for HZ7HC1 through Aetrix?
Please submit a Request for Quotation (RFQ) for HZ7HC1 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 HZ7HC1 reliable?
The price and inventory of HZ7HC1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZ7HC1 is usually 5 days.
3.What payment methods are accepted for HZ7HC1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZ7HC1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZ7HC1?
HZ7HC1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZ7HC1 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 HZ7HC1?
For technical support, including HZ7HC1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZ7HC1 requirements.
6.How does Aetrix verify that HZ7HC1 is sourced from the original manufacturer or authorized distributors?
All HZ7HC1 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 HZ7HC1 meets industry standards.
7.What is the process for return or replacement of HZ7HC1?
All HZ7HC1 units undergo pre-shipment inspection (PSI). If there is an issue with HZ7HC1, 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 HZ7HC1 part is unused and in its original packaging.
Return procedure for HZ7HC1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HZ7HC1 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
