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Renesas HZ33-1L-E
- Part No.:
- HZ33-1L-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZ33-1L-E.pdf
- Description:
- DIODE ZENER 0.4W
- Quantity:
- Payment:
- Shipping:
Inventory:7,400
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Product details
Overview
HZ33-1L-E from Renesas is a silicon planar Zener diode engineered for low-noise voltage regulation in precision analog circuits, featuring a nominal zener voltage of 31.2–32.6 V at 0.5 mA test current, 400 mW power dissipation, 250 Ω dynamic impedance, and DO-35 glass package with navy-blue cathode band.
For engineers reviewing the HZ33-1L-E datasheet, HZ33-1L-E pinout, HZ33-1L-E application, or HZ33-1L-E equivalent, key selection criteria include low-noise performance (1/3–1/10 of standard HZ series), tight zener voltage tolerance, temperature coefficient stability, and suitability for low-drift reference designs in instrumentation and telecom power supplies.
Technical Context
The HZ33-1L-E operates as a two-terminal shunt regulator with DC-tested zener breakdown characteristics, optimized for stable reference generation under low-current bias (0.5–1 mA). Its low leakage current and reduced noise floor stem from planar process refinement and controlled junction geometry.
Designed for ambient temperatures from −55°C to +175°C, it maintains zener voltage stability across thermal gradients with a typical temperature coefficient near −0.04 %/°C (≈−12.5 mV/°C) at 32 V, as confirmed by Figure 2 in REJ03G0182-0300 Rev.3.00.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 31.2–32.6 V at IZ = 0.5 mA - defines precise regulation point for mid-range voltage references |
| Dynamic Resistance (rd) | 250 Ω max at IZ = 0.5 mA - ensures minimal output voltage variation under load transients |
| Power Dissipation (Pd) | 400 mW at Ta = 25°C - supports continuous operation in compact PCB layouts without forced cooling |
| Junction Temperature (Tj) | 175°C maximum - enables reliable use in high-temperature industrial environments |
| Reverse Leakage (IR) | 1 μA max at VR = 20.2 V - minimizes error current in high-impedance reference nodes |
| Noise Level | ≈1/3–1/10 of standard HZ series - directly improves SNR in audio preamps and sensor signal chains |
Pinout & Package
Package: DO-35 glass axial package (JEITA code GRZZ0002ZB-A), orange body color, navy-blue cathode band, 2.0 mm diameter × 26.0 mm length, 0.13 g mass.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener breakdown terminal | Connected to regulated voltage rail; reverse-biased during normal operation |
| 2 (Anode) | Reference ground node | Tied to circuit common; establishes reference potential for feedback loops |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise Zener structure | Reduces broadband voltage noise by factor of 3–10 vs. legacy HZ series, critical for 16-bit+ ADC references |
| Stable zener impedance | 250 Ω max ensures <±0.5% output deviation under ±10% current variation in feedback networks |
| Wide operating temperature range | −55°C to +175°C junction rating supports deployment in automotive engine control and industrial motor drives |
| Precision voltage tolerance | ±2.3% total spread (31.2–32.6 V) enables single-supply calibration without trimming resistors |
Applications
| High-Precision Voltage Reference | Low-Noise Audio Power Supply |
|---|---|
Use Scenario: Stable 32 V reference for 24-bit delta-sigma ADC biasing in portable test equipment. IC Role / Device Role / Timing Role: Shunt voltage reference providing temperature-stable excitation voltage for precision resistor ladder networks. Use Value: Low 250 Ω dynamic resistance and −0.04 %/°C tempco minimize gain drift over 0–70°C operating range. |
Use Scenario: Clean B+ rail stabilization in tube amplifier high-voltage supply stages. IC Role / Device Role / Timing Role: Low-noise Zener clamp reducing ripple-induced hum in 30–35 V filament and plate supplies. Use Value: 1/3–1/10 lower noise than standard HZ diodes suppresses audible hiss in sensitive preamp stages. |
| Industrial Sensor Excitation | Telecom Line Card Biasing |
Use Scenario: Constant-current source driver for 4–20 mA loop transmitters using RTD or strain gauge bridges. IC Role / Device Role / Timing Role: Zener-regulated current mirror reference enabling <±0.1% linearity over temperature. Use Value: 400 mW power rating allows direct series-dropping from 48 V telecom rails without heatsinking. |
Use Scenario: Bias voltage generation for RF front-end LNAs requiring stable 32 V supply in base station line cards. IC Role / Device Role / Timing Role: Primary shunt regulator establishing clean local VBIAS independent of switching PSU noise. Use Value: Low leakage (<1 μA) prevents loading of high-Z LNA enable control nodes during standby mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX85C33 (Nexperia) | 33 V nominal, 1.3 W Pd, 60 Ω rd, DO-41 package, higher power but larger footprint | Preferred where higher current capability (>10 mA) and lower impedance are required, not low-noise priority | Select when thermal margin >400 mW is needed; avoid if board space or noise sensitivity constrain design |
| 1N5257B (ON Semiconductor) | 33 V nominal, 500 mW Pd, 35 Ω rd, DO-35, no specified low-noise optimization | Suitable for general-purpose regulation but lacks documented noise reduction versus HZ-L series | Choose for cost-sensitive non-critical references; not recommended for metrology-grade or audio applications |
Compared with BZX85C33 and 1N5257B, the HZ33-1L-E delivers uniquely low noise and tighter voltage tolerance in the same DO-35 form factor, making it optimal for high-fidelity analog systems where spectral purity and thermal stability outweigh raw power handling.
Availability
HZ33-1L-E is available at Aetrix Electronics and suitable for precision voltage reference, low-noise audio supply, and industrial sensor excitation applications requiring stable component supply, long-term lifecycle support, and traceable sourcing from Renesas.
Supply support for HZ33-1L-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. is a Japanese semiconductor manufacturer specializing in microcontrollers, analog mixed-signal ICs, and discrete power devices, with global R&D and manufacturing infrastructure.
The HZ-L Series was developed specifically for low-noise, high-stability voltage reference applications in test & measurement, telecom infrastructure, and industrial automation-addressing demand for improved SNR and thermal drift performance over legacy Zener families.
FAQ
What is the exact zener voltage range for HZ33-1L-E at 0.5 mA test current?
The HZ33-1L-E has a guaranteed zener voltage range of 31.2 V to 32.6 V when tested at IZ = 0.5 mA, as specified on page 3 of REJ03G0182-0300 Rev.3.00. This 1.4 V span reflects factory binning for precision reference use, and the value is DC-measured per Note 1 in the datasheet.
Does HZ33-1L-E have a documented temperature coefficient, and what is its typical value?
Yes, the HZ33-1L-E exhibits a negative temperature coefficient typical of mid-voltage Zeners. Figure 2 in the datasheet shows γZ ≈ −0.04 %/°C (or −12.5 mV/°C) at ~32 V, confirming stable, predictable drift behavior essential for compensated reference designs.
Is HZ33-1L-E compatible with lead-free reflow soldering processes?
The DO-35 glass package of HZ33-1L-E is rated for standard lead-free reflow profiles per JEDEC J-STD-020. Maximum peak temperature must not exceed 260°C for ≤10 seconds, consistent with Renesas' packaging specifications for GRZZ0002ZB-A devices.
How does the noise performance of HZ33-1L-E compare quantitatively to standard Zener diodes?
The HZ33-1L-E achieves approximately 1/3 to 1/10 the broadband voltage noise of conventional HZ-series Zeners, as stated in the Features section of REJ03G0182-0300. This improvement stems from proprietary planar junction processing and is validated across the full HZ-L family, including HZ33-1L-E.
What is the maximum reverse leakage current for HZ33-1L-E, and at what voltage is it measured?
The maximum reverse leakage current for HZ33-1L-E is 1 μA, measured at VR = 20.2 V (specified as "Max VR (V)" = 20.2 V in the Electrical Characteristics table on page 3). This low leakage preserves accuracy in high-impedance reference divider networks.
HZ33-1L-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:
- -
HZ33-1L-E FAQ
1.How can I place an order for HZ33-1L-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZ33-1L-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 HZ33-1L-E reliable?
The price and inventory of HZ33-1L-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZ33-1L-E is usually 5 days.
3.What payment methods are accepted for HZ33-1L-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZ33-1L-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZ33-1L-E?
HZ33-1L-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZ33-1L-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 HZ33-1L-E?
For technical support, including HZ33-1L-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZ33-1L-E requirements.
6.How does Aetrix verify that HZ33-1L-E is sourced from the original manufacturer or authorized distributors?
All HZ33-1L-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 HZ33-1L-E meets industry standards.
7.What is the process for return or replacement of HZ33-1L-E?
All HZ33-1L-E units undergo pre-shipment inspection (PSI). If there is an issue with HZ33-1L-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 HZ33-1L-E part is unused and in its original packaging.
Return procedure for HZ33-1L-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HZ33-1L-E Tags
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