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Renesas HZ9C2LTD-E
- Part No.:
- HZ9C2LTD-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZ9C2LTD-E.pdf
- Description:
- DIODE ZENER 0.4W
- Quantity:
- Payment:
- Shipping:
Inventory:120,000
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Product details
Overview
HZ9C2LTD-E from Renesas Electronics is a silicon planar Zener diode optimized for low-noise voltage regulation in precision analog circuits, with a nominal zener voltage of 9.1–9.5 V at 0.5 mA test current, 60 Ω dynamic impedance, and 400 mW power dissipation in DO-35 package. It serves as a stable reference in low-drift power supply feedback paths and sensor biasing networks.
For engineers reviewing the HZ9C2LTD-E datasheet, HZ9C2LTD-E pinout, HZ9C2LTD-E application, or HZ9C2LTD-E equivalent, this device is selected for noise-sensitive stabilization where zener temperature coefficient (−0.02 %/°C typical), low leakage (<1 μA at VR = 7.0 V), and tight voltage tolerance are critical design constraints.
Technical Context
The HZ9C2LTD-E employs a planar diffusion process to achieve reduced flicker noise-approximately 1/3–1/10 that of standard HZ-series diodes-by minimizing surface defect density and junction area variability. Its low dynamic resistance (60 Ω max at IZ = 0.5 mA) ensures minimal output impedance under varying load conditions.
Designed for DC-stabilized operation, it exhibits a negative temperature coefficient near 9.3 V (−0.02 %/°C), enabling predictable drift compensation in multi-stage references. The DO-35 glass package supports axial lead mounting and meets JEITA GRZZ0002ZB-A mechanical specifications with 2.0 mm body diameter and 26 mm lead length.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.1–9.5 V at IZ = 0.5 mA - defines precise DC reference point for feedback loops requiring ±2.2% tolerance. |
| Dynamic Resistance (rd) | ≤60 Ω at IZ = 0.5 mA - ensures minimal AC ripple transmission and high PSRR in shunt regulator topologies. |
| Reverse Leakage Current (IR) | ≤1 μA at VR = 7.0 V - reduces error contribution in high-impedance bias networks and low-power sensor interfaces. |
| Power Dissipation (Pd) | 400 mW at Ta = 25°C - enables use in compact PCB layouts without forced cooling in ≤100 mA shunt applications. |
| Junction Temperature (Tj) | −55 to +175°C - supports operation in industrial environments including automotive under-hood and factory automation enclosures. |
| Temperature Coefficient (γZ) | −0.02 %/°C typical - allows predictable thermal drift modeling for calibration-critical instrumentation front-ends. |
Pinout & Package
Package: DO-35 (JEITA GRZZ0002ZB-A), axial-leaded glass envelope, 2.0 mm body diameter, 26 mm lead length, orange body color with navy blue cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | High-side reference node | Connected to regulated output or op-amp inverting input; polarity must be observed to avoid reverse breakdown failure. |
| 2 (Anode) | Ground or return path | Serves as current sink terminal; requires low-impedance connection to minimize IR drop in precision reference paths. |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise Zener structure | 1/3–1/10 noise vs. legacy HZ series - directly improves SNR in audio preamps and ADC reference buffers. |
| Tight zener voltage tolerance | ±2.2% at 9.3 V nominal - eliminates need for post-calibration trimming in mid-accuracy voltage references. |
| Stable temperature coefficient | −0.02 %/°C - enables predictable drift compensation when paired with positive-TC components in composite references. |
| Low dynamic impedance | 60 Ω max - maintains regulation accuracy across ±10% load current variation in unregulated input supplies. |
| DO-35 mechanical compatibility | Standard axial footprint - supports automated insertion and reflow-compatible hand-soldering with 26 mm lead spacing. |
Applications
| Industrial Sensor Signal Conditioning | Medical Instrumentation Biasing |
|---|---|
|
Use Scenario: Stabilizing excitation voltage for strain gauge bridges in load cells and pressure transducers operating over −40°C to +85°C ambient. IC Role / Device Role / Timing Role: Shunt voltage reference providing low-drift, low-noise bias to instrumentation amplifier inputs. Use Value: Enables <10 ppm/°C system-level offset drift by contributing only −0.02 %/°C zener drift and <1 μA leakage-induced error. |
Use Scenario: Supplying stable bias to photodiode transimpedance amplifiers in pulse oximeters and ECG front-ends. IC Role / Device Role / Timing Role: Low-noise DC reference for analog signal chain biasing where EMI immunity and microvolt stability are critical. Use Value: Reduces baseline noise floor by >7 dB versus standard Zeners, improving small-signal resolution in sub-μV biomedical measurements. |
| Programmable Logic Controller (PLC) Analog Input Modules | Test & Measurement Equipment References |
|
Use Scenario: Calibrating 16-bit DAC outputs in modular I/O systems requiring traceable voltage standards across temperature cycles. IC Role / Device Role / Timing Role: Primary shunt reference in ratiometric ADC driver stages with external op-amp buffering. Use Value: Delivers 0.5% initial accuracy and <50 ppm/°C total drift over full industrial range, meeting IEC 61000-4-2 immunity requirements. |
Use Scenario: Establishing precision 9.3 V reference in bench multimeters and oscilloscope vertical amplifiers. IC Role / Device Role / Timing Role: Low-noise, low-drift voltage source for gain-setting networks and auto-zero calibration circuits. Use Value: Supports 0.01% measurement accuracy by limiting reference-induced error to <100 μV over 24-hour warm-up period. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C9V1 (Nexperia) | Same 9.1 V nominal, but 90 Ω rd, higher noise, SOT-23 package | Surface-mount only; unsuitable for through-hole designs or high-reliability axial assemblies | Select when board space is constrained and noise budget allows +4 dB increase. |
| 1N4739A (ON Semiconductor) | 9.1 V nominal, 100 Ω rd, 1 W Pd, DO-41 package | Larger DO-41 footprint; higher power but 3× higher noise and looser 5% tolerance | Choose only if >400 mW dissipation is required and low-noise performance is secondary. |
Compared with BZX84-C9V1 and 1N4739A, the HZ9C2LTD-E delivers superior noise performance and tighter voltage tolerance in the standardized DO-35 form factor-making it the preferred choice for analog-intensive industrial and medical systems where reference stability dominates design trade-offs.
Availability
HZ9C2LTD-E is available at Aetrix Electronics and suitable for industrial sensor conditioning, medical instrumentation biasing, and programmable logic controller analog modules requiring stable component supply with guaranteed long-term continuity.
Supply support for HZ9C2LTD-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 global semiconductor leader specializing in microcontrollers, analog power devices, and trusted interface solutions for industrial, automotive, and infrastructure markets.
The HZ-L Series was developed specifically for low-noise, high-stability voltage reference applications in precision analog systems-addressing demand for improved SNR and thermal predictability beyond legacy Zener families.
FAQ
What is the zener voltage tolerance of HZ9C2LTD-E at 0.5 mA test current?
The HZ9C2LTD-E has a zener voltage range of 9.1 V to 9.5 V at IZ = 0.5 mA, corresponding to ±2.2% tolerance around the nominal 9.3 V value. This tight specification enables direct use in precision reference designs without post-manufacturing trimming, and is confirmed in the Renesas REJ03G0182-0300 datasheet, page 2.
Does HZ9C2LTD-E support DC-only operation, and why is that specified?
Yes, the HZ9C2LTD-E is characterized and rated for DC operation only, as explicitly noted in the datasheet's "Note 1" on pages 2 and 3. Its dynamic resistance and voltage stability parameters are measured under steady-state DC conditions; AC or pulsed operation may cause thermal instability or exceed safe operating area limits not defined in the specification.
How does the noise performance of HZ9C2LTD-E compare to standard Zener diodes?
The HZ9C2LTD-E achieves approximately 1/3 to 1/10 the noise level of conventional HZ-series Zeners due to its optimized silicon planar process and reduced junction defect density. This is documented in the "Features" section of the REJ03G0182-0300 datasheet and directly benefits low-level analog signal chains where reference noise couples into sensitive measurement paths.
What is the maximum allowable junction temperature for HZ9C2LTD-E?
The HZ9C2LTD-E has a maximum junction temperature (Tj) rating of +175°C, as specified in the Absolute Maximum Ratings table on page 2 of the REJ03G0182-0300 datasheet. This allows reliable operation in high-ambient environments such as industrial motor drives and enclosed power supplies when derated per the power dissipation vs. ambient temperature curve on page 4.
Is HZ9C2LTD-E RoHS compliant and what is its packaging format?
Yes, HZ9C2LTD-E complies with EU RoHS Directive requirements, consistent with Renesas' environmental policy stated in the datasheet's "Notice" section. It is supplied in DO-35 axial glass package (JEITA code GRZZ0002ZB-A), with orange body and navy blue cathode band, and is shipped in bulk or tape-and-reel per customer order configuration.
HZ9C2LTD-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:
- -
HZ9C2LTD-E FAQ
1.How can I place an order for HZ9C2LTD-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZ9C2LTD-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 HZ9C2LTD-E reliable?
The price and inventory of HZ9C2LTD-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZ9C2LTD-E is usually 5 days.
3.What payment methods are accepted for HZ9C2LTD-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZ9C2LTD-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZ9C2LTD-E?
HZ9C2LTD-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZ9C2LTD-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 HZ9C2LTD-E?
For technical support, including HZ9C2LTD-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZ9C2LTD-E requirements.
6.How does Aetrix verify that HZ9C2LTD-E is sourced from the original manufacturer or authorized distributors?
All HZ9C2LTD-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 HZ9C2LTD-E meets industry standards.
7.What is the process for return or replacement of HZ9C2LTD-E?
All HZ9C2LTD-E units undergo pre-shipment inspection (PSI). If there is an issue with HZ9C2LTD-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 HZ9C2LTD-E part is unused and in its original packaging.
Return procedure for HZ9C2LTD-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HZ9C2LTD-E Tags
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