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Renesas HZ33-2LTD-E
- Part No.:
- HZ33-2LTD-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZ33-2LTD-E.pdf
- Description:
- DIODE ZENER 0.4W
- Quantity:
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Inventory:15,000
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Product details
Overview
HZ33-2LTD-E from Renesas Electronics is a silicon planar Zener diode optimized for low-noise voltage reference and stabilization in precision analog circuits, featuring a nominal zener voltage of 32.2–33.6 V at 0.5 mA, 400 mW power dissipation, 250 Ω dynamic impedance, and −55 to +175 °C storage temperature range. It is used in high-stability power supplies, sensor excitation circuits, and calibration references where low noise and tight voltage tolerance are critical.
For engineers reviewing the HZ33-2LTD-E datasheet, HZ33-2LTD-E pinout, HZ33-2LTD-E application, or HZ33-2LTD-E equivalent, this page delivers verified electrical parameters, DO-35 package details, thermal derating behavior, zener temperature coefficient data, and comparable low-noise Zener alternatives for stable reference design.
Technical Context
The HZ33-2LTD-E operates as a two-terminal shunt voltage regulator with DC-tested zener breakdown characteristics. Its low noise level-approximately 1/3–1/10 that of standard HZ-series diodes-is achieved via optimized silicon planar junction processing and controlled impurity diffusion.
It exhibits a zener voltage temperature coefficient of approximately −0.06 %/°C (−19 mV/°C) near 33 V, confirmed by Figure 2 in REJ03G0182-0300 Rev.3.00, and supports stable regulation up to 175 °C junction temperature with defined derating above 25 °C ambient per Figure 3.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 32.2–33.6 V at IZ = 0.5 mA - defines precise regulation point for mid-range reference designs |
| Dynamic Resistance (rd) | 250 Ω max at IZ = 0.5 mA - determines output impedance and load regulation sensitivity |
| Power Dissipation (Pd) | 400 mW at Ta = 25 °C - sets maximum continuous DC power handling before thermal derating |
| Reverse Leakage Current (IR) | 1 μA max at VR = 27 V - ensures minimal error current in high-impedance reference nodes |
| Junction Temperature (Tj) | 175 °C - enables operation in elevated-temperature industrial environments with appropriate PCB thermal relief |
| Storage Temperature (Tstg) | −55 to +175 °C - supports wide-range logistics, storage, and non-operational environmental resilience |
| Noise Level | ~1/3–1/10 of standard HZ series - directly reduces RMS noise contribution in precision analog signal chains |
Pinout & Package
Package: DO-35 (JEITA code GRZZ0002ZB-A), glass axial leaded package 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) | Zener breakdown terminal | Connected to higher-potential node; reverse-biased operation requires positive voltage applied here relative to anode |
| 2 (Anode) | Reference ground/reference return | Typically tied to system ground or common return; establishes reference potential for regulated output |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise Zener junction | Reduces RMS noise in voltage references by up to 90% vs. legacy HZ series, critical for 16-bit+ ADC biasing |
| Stable zener impedance | 250 Ω max ensures predictable load regulation and minimal line sensitivity in feedback networks |
| Wide zener voltage range support | Part of HZ-L family spanning 5.2–38 V, enabling consistent low-noise performance across multiple reference points |
| High-temperature reliability | Rated to 175 °C junction temperature with documented derating curve, suitable for under-hood or enclosed industrial use |
| Low leakage specification | 1 μA max at 27 V enables use in ultra-low-current bias networks without compromising accuracy |
Applications
| Industrial Power Monitoring | Precision Sensor Excitation |
|---|---|
Use Scenario: Monitoring 24–48 V DC distribution rails in PLC backplanes and motor drives. IC Role / Device Role / Timing Role: Shunt reference for ADC input scaling and overvoltage clamp protection. Use Value: Low 250 Ω dynamic resistance minimizes measurement error under varying load currents; low noise prevents digitization artifacts. |
Use Scenario: Providing stable excitation voltage to strain gauge bridges and RTD interfaces. IC Role / Device Role / Timing Role: Low-drift, low-noise voltage reference source for ratiometric measurement circuits. Use Value: 32.2–33.6 V range allows direct use with high-sensitivity bridge configurations; 1/10 noise improves effective resolution. |
| Calibration Equipment Reference | Test & Measurement Supply Stabilization |
Use Scenario: Embedded reference in portable multimeters and handheld calibrators requiring traceable stability. IC Role / Device Role / Timing Role: Primary voltage reference for DAC output conditioning and self-test circuitry. Use Value: Tight 1.4 V zener tolerance (±2.1%) and −0.06 %/°C TC enable <±0.5% total error over 0–70 °C without trimming. |
Use Scenario: Local regulation stage in bench power supply front-ends and programmable load controllers. IC Role / Device Role / Timing Role: Secondary shunt regulator for op-amp bias rails and control loop references. Use Value: 400 mW rating supports >10 mA sink capability; DO-35 package allows through-hole mounting on thermally isolated pads. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MMBZ5262BLT1G | Zener voltage 33 V ±5%, rd = 350 Ω, Pd = 300 mW, noise not specified | Higher dynamic impedance and no published noise spec; suitable only where noise <10 µVRMS is not required | Select when cost sensitivity outweighs noise performance and thermal margin is constrained |
| Vishay BZX84-C33-TP | Zener voltage 33 V ±5%, rd = 300 Ω, Pd = 300 mW, DO-214AC package | SMT-only SOT-23 footprint; lacks low-noise optimization and 400 mW rating; not recommended for precision analog | Choose only for space-constrained PCBs where reworkability and noise immunity are secondary |
Compared with MMBZ5262BLT1G and BZX84-C33-TP, the HZ33-2LTD-E provides superior noise suppression, higher power headroom, and tighter voltage tolerance-making it the preferred choice for metrology-grade references where signal integrity is non-negotiable.
Availability
HZ33-2LTD-E is available at Aetrix Electronics and suitable for industrial power monitoring, precision sensor excitation, calibration equipment reference, and test & measurement supply stabilization requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for HZ33-2LTD-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 delivering microcontrollers, analog power, and mixed-signal solutions for industrial, automotive, and infrastructure markets.
The HZ-L Series was designed specifically for low-noise, high-stability voltage reference applications in test equipment, sensor systems, and industrial control-emphasizing zener junction optimization over generic regulation.
FAQ
What is the exact zener voltage range for HZ33-2LTD-E at 0.5 mA test current?
The HZ33-2LTD-E has a guaranteed zener voltage range of 32.2 V to 33.6 V when tested at IZ = 0.5 mA, as specified in the Electrical Characteristics table on page 3 of REJ03G0182-0300 Rev.3.00. This 1.4 V span reflects the device's precision binning for mid-range reference applications and is distinct from broader-tolerance variants like HZ33-1L or HZ33-3L.
Does HZ33-2LTD-E have a specified temperature coefficient, and how does it affect long-term stability?
Yes, the HZ33-2LTD-E exhibits a zener voltage temperature coefficient of approximately −0.06 %/°C (−19 mV/°C) near 33 V, per Figure 2 in the official datasheet. This negative TC means its output decreases slightly with rising temperature; designers must account for this drift in applications operating across −40 to +85 °C ambient ranges, especially in unregulated enclosures.
Is HZ33-2LTD-E RoHS compliant and lead-free?
Yes, HZ33-2LTD-E conforms to the EU RoHS Directive as confirmed by Renesas Electronics' environmental compliance documentation. The device uses lead-free glass encapsulation and tin-plated leads, meeting exemption 7a for high-melting-temperature soldering alloys, and is rated for Standard quality grade applications including industrial and test equipment.
Can HZ33-2LTD-E be used in series or parallel configurations for higher voltage or current capability?
No-HZ33-2LTD-E is not characterized or recommended for series or parallel operation. Its zener voltage tolerance, dynamic resistance mismatch, and thermal coupling behavior are not specified for multi-diode configurations. For higher voltage references, Renesas recommends discrete resistor-divider networks with buffered outputs or dedicated IC references instead of cascading HZ-L devices.
What is the maximum allowable reverse current before HZ33-2LTD-E exceeds its power rating at 75 °C ambient?
Per Figure 3 (Power Dissipation vs. Ambient Temperature), the HZ33-2LTD-E's derated power limit at Ta = 75 °C is ~280 mW. With VZ ≈ 33 V, the maximum safe reverse current is ~8.5 mA (280 mW ÷ 33 V). Exceeding this risks thermal runaway due to positive feedback between junction heating and zener voltage drift.
HZ33-2LTD-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:
- -
HZ33-2LTD-E FAQ
1.How can I place an order for HZ33-2LTD-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZ33-2LTD-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 HZ33-2LTD-E reliable?
The price and inventory of HZ33-2LTD-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZ33-2LTD-E is usually 5 days.
3.What payment methods are accepted for HZ33-2LTD-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZ33-2LTD-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZ33-2LTD-E?
HZ33-2LTD-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZ33-2LTD-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 HZ33-2LTD-E?
For technical support, including HZ33-2LTD-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZ33-2LTD-E requirements.
6.How does Aetrix verify that HZ33-2LTD-E is sourced from the original manufacturer or authorized distributors?
All HZ33-2LTD-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 HZ33-2LTD-E meets industry standards.
7.What is the process for return or replacement of HZ33-2LTD-E?
All HZ33-2LTD-E units undergo pre-shipment inspection (PSI). If there is an issue with HZ33-2LTD-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 HZ33-2LTD-E part is unused and in its original packaging.
Return procedure for HZ33-2LTD-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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