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Renesas HZ33-2-E
- Part No.:
- HZ33-2-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZ33-2-E.pdf
- Description:
- DIODE ZENER 0.5W
- Quantity:
- Payment:
- Shipping:
Inventory:15,505
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Product details
Overview
HZ33-2-E from Renesas is a silicon planar Zener diode designed for voltage regulation in low-power stabilized power supplies, with a nominal zener voltage of 33 V (min 33.2 V, max 34.6 V at IZ = 2 mA), 500 mW power dissipation, and dynamic resistance of 120 Ω at 2 mA - used in precision reference and overvoltage protection circuits.
For engineers reviewing the HZ33-2-E datasheet, HZ33-2-E pinout, HZ33-2-E application, or HZ33-2-E equivalent, key selection criteria include zener voltage tolerance (±2.3% at 33 V), temperature coefficient (−0.06 %/°C), DO-35 package compatibility, and low leakage current (<1 µA at VR = 25 V).
Technical Context
This discrete Zener diode operates in reverse breakdown mode to maintain stable voltage under varying load and line conditions. Its planar construction ensures consistent breakdown characteristics and low noise, with junction temperature rated up to 175°C for industrial ambient operation.
It is specified for DC testing only, with reverse current limited to ≤1 µA at VR = 25 V and dynamic resistance measured at 2 mA zener current. The −0.06 %/°C temperature coefficient indicates negative drift, requiring thermal compensation in high-accuracy references.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 33.2–34.6 V at IZ = 2 mA - defines regulated output range in shunt regulator designs |
| Power Dissipation (Pd) | 500 mW at Ta = 25°C - sets maximum continuous power handling before thermal derating |
| Dynamic Resistance (rd) | 120 Ω at IZ = 2 mA - determines regulation stiffness and output impedance in feedback paths |
| Reverse Current (IR) | ≤1 µA at VR = 25 V - ensures minimal quiescent loss in standby or low-current bias networks |
| Temperature Coefficient (γZ) | −0.06 %/°C - quantifies voltage drift per degree Celsius, critical for temperature-stable references |
| Junction Temperature (Tj) | 175°C maximum - enables operation in high-ambient industrial environments without forced cooling |
Pinout & Package
Package: DO-35 glass axial leaded package (JEITA code GRZZ0002ZB-A), 2.0 mm diameter × 26.0 mm length, cathode identified by navy blue band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (banded end) | Cathode | Connected to regulated voltage node; reverse-biased terminal where zener breakdown occurs |
| 2 (unbanded end) | Anode | Connected to ground or lower-potential rail; completes current path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Low zener impedance | 120 Ω at 2 mA - improves load regulation and reduces output ripple in shunt configurations |
| Wide zener voltage range | 33.2–34.6 V - supports tight-tolerance voltage clamping for 33 V rail protection |
| Stable temperature coefficient | −0.06 %/°C - enables predictable drift behavior for compensated reference designs |
| High junction temperature rating | 175°C - allows reliable operation in enclosed or thermally constrained enclosures |
Applications
| Industrial Power Supply Reference | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Providing stable 33 V reference for feedback loop of isolated DC-DC converter in factory automation PLC power modules. IC Role / Device Role / Timing Role: Shunt voltage reference establishing precise error amplifier setpoint. Use Value: Maintains ±2.3% output accuracy across 0–70°C ambient with <1 µA leakage minimizing standby loss. | Use Scenario: Clamping transient surges on 33 V backplane bus in railway signaling control units. IC Role / Device Role / Timing Role: Passive overvoltage limiter diverting excess energy to ground during ESD or inductive kick events. Use Value: Responds within nanoseconds to clamp spikes above 34.6 V while dissipating ≤500 mW peak power. |
| Low-Power Sensor Biasing | Calibration Voltage Standard |
Use Scenario: Biasing precision analog front-end of 4–20 mA current-loop transmitter operating from unregulated 36 V supply. IC Role / Device Role / Timing Role: Zener shunt regulator supplying clean 33 V to op-amp and ADC reference circuitry. Use Value: Delivers stable bias with 120 Ω dynamic resistance reducing sensitivity to supply ripple and load variation. | Use Scenario: Serving as traceable 33 V calibration point in handheld multimeter internal self-test circuitry. IC Role / Device Role / Timing Role: Primary voltage standard against which DMM ADC gain and offset are adjusted. Use Value: −0.06 %/°C drift enables <0.2% total error over 20–50°C calibration window without active compensation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4747A | Zener voltage 20 V (not 33 V); Pd = 1 W; DO-41 package; rd = 22 Ω at 12.5 mA | Higher power, lower impedance, but incompatible voltage grade - requires redesign of resistor network and thermal layout | Select only if 20 V regulation is acceptable and higher power margin is needed |
| BZX55-C33 | Zener voltage 33 V (32.4–33.6 V); Pd = 500 mW; DO-35; rd = 90 Ω at 5 mA; tighter tolerance (±5%) | Nearly identical voltage range and package, but lower dynamic resistance and different test current - may improve regulation in high-precision feedback | Valid alternative when lower rd and tighter VZ spread are prioritized over Renesas-specific qualification |
Compared with HZ33-2-E, 1N4747A offers higher power and lower impedance but targets 20 V regulation, while BZX55-C33 matches the 33 V grade with improved rd and tighter VZ tolerance - both require verification of thermal performance and PCB footprint compatibility despite shared DO-35 form factor.
Availability
HZ33-2-E is available at Aetrix Electronics and suitable for industrial power supply reference, overvoltage protection clamp, and low-power sensor biasing requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for HZ33-2-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 is a global semiconductor manufacturer specializing in microcontrollers, analog, and power devices for automotive, industrial, and infrastructure markets.
HZ33-2-E belongs to the HZ Series silicon planar Zener diodes, engineered for stable voltage regulation in cost-sensitive, space-constrained power management applications across industrial and consumer equipment.
FAQ
What is the exact zener voltage range for HZ33-2-E at 2 mA test current?
The HZ33-2-E has a zener voltage range of 33.2 V to 34.6 V when tested at IZ = 2 mA, corresponding to Grade "-2" in the HZ33 family. This 1.4 V span reflects ±2.3% tolerance around the nominal 33 V rating, verified per Renesas datasheet REJ03G0180-0600 Rev.6.00.
Is HZ33-2-E compatible with standard DO-35 footprint layouts?
Yes, HZ33-2-E uses the DO-35 package (JEITA code GRZZ0002ZB-A) with 2.0 mm body diameter and 26.0 mm length, matching industry-standard DO-35 mechanical dimensions. The cathode is marked by a navy blue band, ensuring correct orientation during manual or automated placement of HZ33-2-E.
What is the maximum reverse leakage current specification for HZ33-2-E?
HZ33-2-E specifies a maximum reverse leakage current (IR) of ≤1 µA at VR = 25 V and Ta = 25°C. This low leakage supports energy-efficient operation in battery-backed or always-on circuits where standby current must be minimized - a confirmed parameter from the Electrical Characteristics table on page 4 of the datasheet.
Does HZ33-2-E have a positive or negative temperature coefficient?
HZ33-2-E exhibits a negative temperature coefficient of −0.06 %/°C, meaning its zener voltage decreases slightly as junction temperature increases. This behavior is documented in Figure 2 of the datasheet and must be accounted for in temperature-critical reference designs using HZ33-2-E.
Can HZ33-2-E be used in place of HZ33-3 or HZ33-1 variants?
No - HZ33-2-E is not interchangeable with HZ33-1 or HZ33-3 without circuit validation. Each grade differs in zener voltage range: HZ33-1 is 31.2–32.6 V, HZ33-2-E is 33.2–34.6 V, and HZ33-3 is 34.2–35.7 V. Substituting HZ33-2-E for another grade alters regulation point and may cause system-level overvoltage or undervoltage faults.
HZ33-2-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:
- -
HZ33-2-E FAQ
1.How can I place an order for HZ33-2-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZ33-2-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 HZ33-2-E reliable?
The price and inventory of HZ33-2-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZ33-2-E is usually 5 days.
3.What payment methods are accepted for HZ33-2-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZ33-2-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZ33-2-E?
HZ33-2-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZ33-2-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 HZ33-2-E?
For technical support, including HZ33-2-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZ33-2-E requirements.
6.How does Aetrix verify that HZ33-2-E is sourced from the original manufacturer or authorized distributors?
All HZ33-2-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 HZ33-2-E meets industry standards.
7.What is the process for return or replacement of HZ33-2-E?
All HZ33-2-E units undergo pre-shipment inspection (PSI). If there is an issue with HZ33-2-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 HZ33-2-E part is unused and in its original packaging.
Return procedure for HZ33-2-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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