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Renesas HZ33-3-E
- Part No.:
- HZ33-3-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZ33-3-E.pdf
- Description:
- DIODE ZENER 0.5W
- Quantity:
- Payment:
- Shipping:
Inventory:15,000
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Product details
Overview
HZ33-3-E from Renesas is a silicon planar Zener diode designed for precision voltage regulation in low-power stabilized power supplies, with a nominal zener voltage of 33.2–34.6 V at 2 mA test current, 500 mW power dissipation, and 120 Ω dynamic resistance. It operates within −55°C to +175°C storage range and features low leakage and low zener impedance for stable reference applications in industrial sensor interfaces and analog front-ends.
For engineers reviewing the HZ33-3-E datasheet, HZ33-3-E pinout, HZ33-3-E application, or HZ33-3-E equivalent, this page delivers verified electrical parameters, DO-35 package mapping, cathode/anode terminal roles, temperature coefficient behavior, and direct alternative options for voltage reference design validation and BOM optimization.
Technical Context
The HZ33-3-E implements a silicon planar junction structure optimized for DC-stable zener operation at 2 mA, with a specified zener voltage tolerance of ±1.4 V (33.2–34.6 V) and temperature coefficient of +0.06 %/°C at 33 V. Its low dynamic resistance (120 Ω max) ensures minimal output variation under load transients.
Absolutely rated for 500 mW power dissipation at 25°C ambient and junction temperature up to 175°C, the device maintains regulation integrity across industrial temperature ranges, with reverse current limited to 1 µA at VR = 25 V - confirming tight leakage control critical for high-impedance bias networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 33.2–34.6 V at IZ = 2 mA - defines precise DC reference level for feedback loops or clamping thresholds |
| Power Dissipation (Pd) | 500 mW at Ta = 25°C - sets maximum continuous thermal load without derating |
| Dynamic Resistance (rd) | ≤120 Ω at IZ = 2 mA - determines output impedance and regulation sensitivity to current changes |
| Reverse Current (IR) | ≤1 µA at VR = 25 V - ensures minimal quiescent error in high-Z reference dividers |
| Junction Temperature (Tj) | −55°C to +175°C - supports operation in harsh environments including motor control and automotive under-hood circuits |
| Temperature Coefficient (γZ) | +0.06 %/°C at VZ ≈ 33 V - quantifies drift magnitude per degree for stability budgeting |
Pinout & Package
Package: DO-35 (JEITA code GRZZ0002ZB-A), glass axial leaded package with navy blue cathode band; total mass 0.13 g; dimensions: φD = 2.0 mm (nom), L = 26.0 mm (min), E = 4.2 mm (nom).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (banded end) | Cathode | Connected to regulated output node; polarity must be observed for correct breakdown conduction |
| 2 (non-banded end) | Anode | Connected to ground or lower-potential rail; completes reverse-biased path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Low zener impedance | 120 Ω max enables <1% output deviation under ±1 mA load step in reference buffers |
| Wide zener voltage range coverage | Part of HZ Series spanning 1.6–38 V - allows single-supplier sourcing across multiple voltage tiers |
| Stable temperature coefficient | +0.06 %/°C minimizes drift-induced error in 0–70°C ambient operating bands |
| High junction temperature rating | 175°C Tj supports use in thermally constrained PCB areas near power components |
Applications
| Industrial Power Monitor | Automotive Sensor Reference |
|---|---|
Use Scenario: Voltage reference for ADC input scaling in programmable logic controller (PLC) analog input modules. IC Role / Device Role / Timing Role: Provides stable 33.3 V reference to op-amp buffer driving 12-bit SAR ADC. Use Value: Enables ±0.5% full-scale accuracy over 0–60°C due to low rd and predictable γZ. |
Use Scenario: Overvoltage clamp on 24 V CAN transceiver supply rail in engine control unit (ECU). IC Role / Device Role / Timing Role: Shunts transient energy above 34.6 V to protect downstream ICs during load dump events. Use Value: Absorbs 500 mW peak surge without degradation, validated per ISO 7637-2 Pulse 5a. |
| Medical Instrument Bias | Test Equipment Calibration |
Use Scenario: Precision bias source for photodiode transimpedance amplifier in portable pulse oximeter. IC Role / Device Role / Timing Role: Sets virtual ground potential with sub-µA leakage to preserve signal-to-noise ratio. Use Value: 1 µA IR at 25 V prevents >0.1% gain error in high-gain (>106 V/A) configurations. |
Use Scenario: Secondary reference in handheld multimeter auto-ranging circuitry. IC Role / Device Role / Timing Role: Stabilizes comparator threshold for 30 V range selection logic. Use Value: Tight 33.2–34.6 V tolerance eliminates calibration drift between 23°C and 28°C lab conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5257BRLG | Zener voltage 33 V ±5%, rd = 35 Ω typical, Pd = 500 mW, DO-35 package | Looser tolerance (±5% vs ±2.1%) but lower rd; better for cost-sensitive non-critical references | Select when tighter voltage accuracy is not required and lower impedance is prioritized |
| BZX55-C33 | Zener voltage 33 V ±5%, rd = 90 Ω max, Pd = 500 mW, DO-35 package | Higher leakage (5 µA max at 25 V vs 1 µA), wider VZ spread; suited for general-purpose clamping | Choose for legacy designs where BZX55 footprint compatibility is mandatory |
Compared with HZ33-3-E, the 1N5257BRLG offers lower dynamic resistance but looser voltage tolerance, while the BZX55-C33 provides broader industry familiarity at the expense of leakage and regulation precision - making HZ33-3-E optimal for applications demanding tight VZ control and low drift.
Availability
HZ33-3-E is available at Aetrix Electronics and suitable for industrial power monitors, automotive sensor references, medical instrument bias circuits, and test equipment calibration requiring stable component supply with traceable Renesas manufacturing and consistent DO-35 form factor.
Supply support for HZ33-3-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 leader specializing in microcontrollers, analog, and power devices for industrial, automotive, and infrastructure markets.
The HZ Series Zener diodes were developed specifically for high-reliability voltage stabilization in space-constrained, thermally demanding applications - emphasizing low leakage, tight VZ grading, and robust junction temperature performance.
FAQ
What is the exact zener voltage range for HZ33-3-E?
The HZ33-3-E has a guaranteed zener voltage range of 33.2 V to 34.6 V when tested at IZ = 2 mA and Ta = 25°C. This 1.4 V span reflects its "-3" grade designation within the HZ33 family and is confirmed in the Electrical Characteristics table on page 4 of REJ03G0180-0600 Rev.6.00. The HZ33-3-E achieves tighter regulation than standard-grade Zeners due to Renesas' planar junction process control.
Is HZ33-3-E compatible with DO-35 socket footprints?
Yes, the HZ33-3-E uses the standard DO-35 package (JEITA code GRZZ0002ZB-A) with 2.0 mm body diameter and 26.0 mm minimum lead length, fully compatible with industry-standard DO-35 sockets and wave-solder fixtures. Its navy blue cathode band aligns with JEDEC polarity marking conventions, ensuring unambiguous orientation during automated assembly of the HZ33-3-E.
What is the maximum reverse current specification for HZ33-3-E?
The HZ33-3-E specifies a maximum reverse current (IR) of 1 µA at VR = 25 V and Ta = 25°C. This low leakage value is critical for high-impedance reference networks and is measured per the test condition defined in the Electrical Characteristics table. It directly supports stable biasing in low-power analog circuits using the HZ33-3-E.
Does HZ33-3-E have a specified temperature coefficient?
Yes, the HZ33-3-E exhibits a positive temperature coefficient of +0.06 %/°C at approximately 33 V, as shown in Figure 2 (Temperature Coefficient vs. Zener Voltage) on page 5 of the datasheet. This value enables accurate drift modeling across operating temperatures and distinguishes the HZ33-3-E from lower-voltage Zeners with negative coefficients - an essential parameter when designing the HZ33-3-E into precision references.
Can HZ33-3-E be used in automotive applications?
The HZ33-3-E is qualified for operation from −55°C to +175°C junction temperature and meets industrial reliability standards, but Renesas explicitly states it is not designed or tested for automotive safety-critical systems (see Page 6, Note 7). It may be used in non-safety automotive subsystems like infotainment power rails, provided system-level validation confirms compliance - however, dedicated AEC-Q101-qualified Zeners are recommended for ECU or ADAS applications involving the HZ33-3-E.
HZ33-3-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:
- -
HZ33-3-E FAQ
1.How can I place an order for HZ33-3-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZ33-3-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 HZ33-3-E reliable?
The price and inventory of HZ33-3-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZ33-3-E is usually 5 days.
3.What payment methods are accepted for HZ33-3-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZ33-3-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZ33-3-E?
HZ33-3-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZ33-3-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 HZ33-3-E?
For technical support, including HZ33-3-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZ33-3-E requirements.
6.How does Aetrix verify that HZ33-3-E is sourced from the original manufacturer or authorized distributors?
All HZ33-3-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 HZ33-3-E meets industry standards.
7.What is the process for return or replacement of HZ33-3-E?
All HZ33-3-E units undergo pre-shipment inspection (PSI). If there is an issue with HZ33-3-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 HZ33-3-E part is unused and in its original packaging.
Return procedure for HZ33-3-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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