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Renesas HZ7C1LTD-E
- Part No.:
- HZ7C1LTD-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZ7C1LTD-E.pdf
- Description:
- DIODE ZENER 0.4W
- Quantity:
- Payment:
- Shipping:
Inventory:20,000
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Product details
Overview
HZ7C1LTD-E from Renesas Electronics is a silicon planar Zener diode optimized for low-noise voltage regulation in precision analog circuits, featuring a nominal zener voltage of 7.2–7.6 V at 0.5 mA test current, 60 Ω dynamic impedance, and 400 mW power dissipation in a DO-35 package. It serves as a stable reference in low-drift power supplies, sensor biasing networks, and noise-sensitive instrumentation.
For engineers reviewing the HZ7C1LTD-E datasheet, HZ7C1LTD-E pinout, HZ7C1LTD-E application, or HZ7C1LTD-E equivalent, key selection criteria include zener voltage tolerance (±0.4 V), temperature coefficient (−0.04 %/°C typical), low leakage (<1 μA at VR = 5.0 V), and DO-35 mechanical compatibility with legacy through-hole PCB layouts.
Technical Context
This device operates as a two-terminal voltage reference using avalanche breakdown in a silicon planar junction structure. Its low-noise performance stems from reduced generation-recombination noise versus standard HZ-series diodes-approximately 1/3 to 1/10 lower-achieved via optimized doping and junction geometry.
The HZ7C1LTD-E maintains stable regulation across −55°C to +175°C storage range and up to 175°C junction temperature, with a negative temperature coefficient (−0.04 %/°C) that enables predictable drift compensation in multi-diode reference strings.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 7.2–7.6 V at IZ = 0.5 mA - defines stable reference point for feedback loops and analog thresholds |
| Dynamic Resistance (rd) | 60 Ω max at IZ = 0.5 mA - ensures minimal output voltage shift under load transients |
| Power Dissipation (Pd) | 400 mW - supports continuous operation in compact PCB footprints without forced cooling |
| Reverse Leakage (IR) | <1 μA at VR = 5.0 V - minimizes error current in high-impedance reference nodes |
| Temperature Coefficient (γZ) | −0.04 %/°C typical - enables predictable thermal drift modeling in precision designs |
| Junction Temperature (Tj) | 175°C max - allows reliable operation in industrial environments with elevated ambient temperatures |
Pinout & Package
Package: DO-35 (JEITA code GRZZ0002ZB-A), glass axial leaded case with orange body and navy-blue cathode band. Dimensions: φD = 2.0 mm, L = 26.0 mm, E = 4.2 mm; mass ≈ 0.13 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | High-side reference node | Connected to regulated output or op-amp inverting input; polarity critical for correct biasing |
| 2 (Anode) | Low-side return path | Typically tied to ground or common reference plane; establishes forward voltage drop direction |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise Zener operation | 1/3–1/10 lower noise than standard HZ series - improves SNR in ADC references and audio preamps |
| Stable low-impedance regulation | 60 Ω dynamic resistance at 0.5 mA - reduces sensitivity to supply ripple and load variation |
| Wide operating temperature range | −55°C to +175°C storage, 175°C max junction - suitable for under-hood automotive and industrial control modules |
| Precision voltage tolerance | ±0.4 V over 7.2–7.6 V range - enables tight-tolerance reference design without external trimming |
Applications
| Industrial Sensor Signal Conditioning | Low-Drift Power Supply Reference |
|---|---|
Use Scenario: Biasing bridge-based pressure sensors in factory automation systems where microvolt-level offset stability is required over temperature. IC Role / Device Role / Timing Role: Provides stable excitation voltage and reference for instrumentation amplifiers and sigma-delta ADCs. Use Value: Low dynamic impedance (60 Ω) and low temperature coefficient (−0.04 %/°C) minimize gain and offset drift across −40°C to +85°C operating range. | Use Scenario: Generating a precise 7.5 V reference for linear regulators powering analog front-ends in medical data loggers. IC Role / Device Role / Timing Role: Acts as shunt regulator and voltage reference in discrete LDO feedback networks. Use Value: 400 mW power rating and low leakage (<1 μA) allow stable regulation without significant self-heating or loading error in high-Z feedback paths. |
| Audio Equipment DC Biasing | Test & Measurement Calibration Reference |
Use Scenario: Setting bias points for JFET-input op-amps in studio-grade microphone preamplifiers requiring ultra-low noise floor. IC Role / Device Role / Timing Role: Supplies clean, low-noise DC bias to gate terminals while rejecting supply ripple. Use Value: Diode noise level ~1/10 that of standard HZ series directly lowers system input-referred noise by up to 10 dB. | Use Scenario: Serving as a primary voltage reference in handheld multimeters calibrated to ±0.1% accuracy. IC Role / Device Role / Timing Role: Functions as traceable, stable shunt reference in auto-ranging voltage measurement circuits. Use Value: Tight VZ tolerance (7.2–7.6 V) and low rd enable repeatable 7.5 V setpoint with <0.05% line regulation error. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4733A | Zener voltage 5.1 V, 100 Ω rd, 1 W Pd, DO-41 package | Higher power but higher impedance and noise; unsuitable for low-current, low-noise designs | Select only if ≥5.1 V reference and >500 mW dissipation are required; not a direct substitute for HZ7C1LTD-E's 7.5 V/60 Ω/low-noise profile |
| BZX55C7V5 | Zener voltage 7.5 V ±5%, 80 Ω rd, 500 mW Pd, DO-35 package | Wider VZ tolerance (±5% vs. ±0.4 V), higher rd, no published noise spec | Acceptable for general-purpose regulation where noise and tight tolerance are non-critical; requires layout verification due to identical DO-35 footprint |
Compared with 1N4733A and BZX55C7V5, the HZ7C1LTD-E delivers superior low-noise performance and tighter voltage tolerance in the 7.5 V class, making it preferred for precision analog signal chains-though its 400 mW rating requires careful thermal management in high-current applications.
Availability
HZ7C1LTD-E is available at Aetrix Electronics and suitable for industrial sensor conditioning, low-drift power supply reference, audio DC biasing, and test & measurement calibration requiring stable component supply and long-term parametric consistency.
Supply support for HZ7C1LTD-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 Corporation is a Japanese semiconductor manufacturer specializing in microcontrollers, analog and power devices, and advanced SoCs for industrial, automotive, and infrastructure markets.
The HZ-L Series Zener diodes were designed specifically for low-noise, high-stability voltage reference applications in precision analog systems-emphasizing reduced generation-recombination noise and tight parametric control over legacy HZ-family parts.
FAQ
What is the exact zener voltage range specified for HZ7C1LTD-E at 0.5 mA test current?
The HZ7C1LTD-E has a guaranteed zener voltage range of 7.2 V to 7.6 V when tested at IZ = 0.5 mA, per Renesas datasheet REJ03G0182-0300 Rev.3.00. This ±0.4 V tolerance enables predictable reference design without post-manufacturing trimming. The HZ7C1LTD-E achieves this specification using silicon planar junction technology with controlled doping profiles.
Does HZ7C1LTD-E have a documented noise performance advantage over standard Zener diodes?
Yes-the HZ7C1LTD-E exhibits approximately 1/3 to 1/10 lower diode noise than the legacy HZ series, as confirmed in the Renesas HZ-L Series datasheet. This reduction results from optimized junction geometry and carrier lifetime control. For low-noise applications like sensor signal conditioning or audio biasing, the HZ7C1LTD-E provides measurably improved signal-to-noise ratio compared to generic Zeners such as 1N4733A or BZX55C7V5.
What is the maximum power dissipation and thermal limit for HZ7C1LTD-E?
The HZ7C1LTD-E has a maximum power dissipation (Pd) of 400 mW at Ta = 25°C, with absolute maximum junction temperature (Tj) rated at 175°C. Derating is required above 25°C ambient per the published power vs. temperature curve (Fig.3). The HZ7C1LTD-E's DO-35 package relies on PCB copper area for heat spreading; exceeding 400 mW risks irreversible thermal runaway or parameter shift.
Is HZ7C1LTD-E compatible with standard DO-35 footprint and soldering processes?
Yes-the HZ7C1LTD-E uses the JEITA-standard DO-35 package (code GRZZ0002ZB-A), with 2.0 mm body diameter, 26.0 mm length, and 4.2 mm lead spacing. It is compatible with standard through-hole reflow and wave-soldering profiles for glass-axial components. The cathode band is navy blue, and the body color is orange-matching industry visual identification conventions for Zener polarity and voltage grade.
What is the reverse leakage current specification for HZ7C1LTD-E at 5.0 V reverse bias?
The HZ7C1LTD-E specifies a maximum reverse leakage current (IR) of 1 μA at VR = 5.0 V and Ta = 25°C. This low leakage supports high-impedance reference nodes in battery-powered instrumentation and precision ADC circuits where input bias current must be minimized. The HZ7C1LTD-E achieves this via tight process control of surface passivation and bulk defect density in the silicon planar junction.
HZ7C1LTD-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:
- -
HZ7C1LTD-E FAQ
1.How can I place an order for HZ7C1LTD-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZ7C1LTD-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 HZ7C1LTD-E reliable?
The price and inventory of HZ7C1LTD-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZ7C1LTD-E is usually 5 days.
3.What payment methods are accepted for HZ7C1LTD-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZ7C1LTD-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZ7C1LTD-E?
HZ7C1LTD-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZ7C1LTD-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 HZ7C1LTD-E?
For technical support, including HZ7C1LTD-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZ7C1LTD-E requirements.
6.How does Aetrix verify that HZ7C1LTD-E is sourced from the original manufacturer or authorized distributors?
All HZ7C1LTD-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 HZ7C1LTD-E meets industry standards.
7.What is the process for return or replacement of HZ7C1LTD-E?
All HZ7C1LTD-E units undergo pre-shipment inspection (PSI). If there is an issue with HZ7C1LTD-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 HZ7C1LTD-E part is unused and in its original packaging.
Return procedure for HZ7C1LTD-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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