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Renesas HZ33BP-E
- Part No.:
- HZ33BP-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZ33BP-E.pdf
- Description:
- DIODE ZENER
- Quantity:
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Inventory:8,636
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Product details
Overview
HZ33BP-E from Renesas Technology is a silicon epitaxial planar Zener diode designed for precision voltage regulation and overvoltage clamping in DC power rails and reference circuits. It delivers a nominal zener voltage of 33.0 V (min 31.0 V, max 35.0 V) at 10 mA test current, with dynamic resistance of 25 Ω, 1.0 W power dissipation, and DO-41 glass package construction for high reliability.
For engineers reviewing the HZ33BP-E datasheet, HZ33BP-E pinout, HZ33BP-E application, or HZ33BP-E equivalent, key selection criteria include its ±3.0 V zener tolerance at 10 mA, low temperature coefficient near +0.05 %/°C (per Fig.2), surge capability up to 1.0 W nonrepetitive reverse power, and suitability for industrial power supply feedback loops and analog voltage references.
Technical Context
The HZ33BP-E operates as a two-terminal voltage reference device, conducting in reverse breakdown to maintain stable voltage across its cathode–anode terminals under controlled current. Its DO-41 glass package enables hermetic sealing and thermal stability up to 175°C junction temperature, supporting operation in ambient temperatures from −55°C to +175°C.
Electrical behavior is defined by DC-tested parameters: zener voltage VZ = 31.0–35.0 V at IZ = 10 mA, reverse current IR ≤ 10 µA at VR = 25.0 V, and dynamic resistance rd = 25 Ω - all specified at Ta = 25°C per Rev.6.00 datasheet pages 4–5.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 31.0–35.0 V at IZ = 10 mA - defines clamping threshold for overvoltage protection and reference accuracy. |
| Power Dissipation (Pd) | 1.0 W at Ta = 25°C - sets maximum continuous DC power handling without heatsink. |
| Dynamic Resistance (rd) | 25 Ω at IZ = 10 mA - determines output impedance and voltage regulation sensitivity to current variation. |
| Reverse Current (IR) | ≤10 µA at VR = 25.0 V - ensures low leakage below breakdown, critical for standby power integrity. |
| Junction Temperature (Tj) | −55 to +175°C - supports operation in harsh industrial and automotive under-hood environments. |
| Package | DO-41 glass - provides hermetic seal, mechanical robustness, and compatibility with axial through-hole PCB assembly. |
Pinout & Package
DO-41 glass package with axial leads: total length ≥26.0 mm, body diameter φ3.0 mm, lead diameter φ0.8 mm, mass ≈0.38 g. Cathode identified by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated voltage node; reverse-biased terminal where zener breakdown occurs. |
| 2 (Non-banded End) | Anode | Connected to circuit ground or lower-potential rail; completes reverse-bias path for regulation. |
Key Features
| Feature | Design Value |
|---|---|
| Wide Zener Voltage Range | Supports 1.88–40 V selection across HZ-P Series - enables single-family sourcing for diverse voltage rails. |
| DO-41 Glass Package | Ensures long-term reliability and moisture resistance in industrial environments without conformal coating. |
| Low Dynamic Resistance | 25 Ω at 10 mA - minimizes output voltage shift under load transients in feedback networks. |
| Controlled Temperature Coefficient | +0.05 %/°C typical near 33 V (Fig.2) - reduces drift in precision reference applications over temperature. |
Applications
| Industrial Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback or forward converter feedback loops using optocoupler-coupled TL431 alternatives. IC Role / Device Role / Timing Role: Zener reference element providing stable 33 V threshold to bias error amplifier input or shunt regulator. Use Value: Maintains ±3% output regulation across line/load variations due to tight 31–35 V VZ tolerance and low rd. |
Use Scenario: Clamping transient spikes on 24 V DC control lines exposed to inductive switching noise in PLC I/O modules. IC Role / Device Role / Timing Role: Two-terminal voltage limiter diverting surge current above 33 V to ground before downstream IC damage. Use Value: Withstands 1.0 W nonrepetitive surge (Fig.4) and limits clamping voltage to ≤35 V, protecting 3.3/5/24 V logic interfaces. |
| Analog Voltage Reference | DC-DC Converter Sensing |
Use Scenario: Providing stable reference for 12-bit ADCs in data acquisition systems requiring <0.1% drift over −40 to +85°C. IC Role / Device Role / Timing Role: Passive voltage reference source feeding precision op-amp buffer or resistor divider network. Use Value: Temperature coefficient near +0.05 %/°C (Fig.2) yields <±0.4% total drift over 125°C range, meeting mid-tier accuracy needs. |
Use Scenario: Monitoring output voltage of 3.3 V or 5 V point-of-load regulators via resistive divider into controller FB pin. IC Role / Device Role / Timing Role: Zener-based precision divider top resistor enabling accurate sensing without active components. Use Value: 1.0 W rating allows use in high-resistance dividers (e.g., 1 MΩ/100 kΩ) with negligible self-heating error at 100 µA bias. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5257BRLG | Zener voltage 33 V ±5% (31.35–34.65 V); DO-35 package; Pd = 500 mW; rd = 35 Ω at 12 mA. | Lower power rating limits use in >500 mW clamp or reference roles; smaller DO-35 footprint reduces thermal mass. | Select when board space is constrained and power demand stays below 0.5 W; verify thermal derating at elevated ambient. |
| BZX55-C33 | Zener voltage 33 V ±5% (31.4–34.7 V); DO-35 package; Pd = 500 mW; rd = 35 Ω at 5 mA. | Higher leakage (IR ≤ 100 µA at 26.4 V) vs. HZ33BP-E's ≤10 µA at 25 V - impacts low-power standby designs. | Prefer for cost-sensitive consumer applications where 500 mW suffices and leakage <100 µA is acceptable. |
Compared with 1N5257BRLG and BZX55-C33, the HZ33BP-E offers 100% higher power rating (1.0 W), tighter leakage control (≤10 µA), and lower dynamic resistance (25 Ω), making it suitable for industrial-grade regulation and clamping where thermal margin and precision outweigh footprint constraints.
Availability
HZ33BP-E is available at Aetrix Electronics and suitable for industrial power supplies, overvoltage protection circuits, analog voltage references, and DC-DC converter feedback networks requiring stable component supply and long-lifecycle support.
Supply support for HZ33BP-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. (now part of Renesas Electronics Corporation) is a Japanese semiconductor manufacturer specializing in microcontrollers, analog, and power devices for industrial, automotive, and infrastructure markets.
The HZ-P Series was developed as a family of general-purpose silicon Zener diodes targeting voltage regulation and limiting in industrial power systems, with emphasis on reliability, wide VZ coverage, and DO-41 package robustness.
FAQ
What is the zener voltage tolerance of HZ33BP-E at 10 mA?
The HZ33BP-E has a zener voltage range of 31.0 V to 35.0 V at IZ = 10 mA, corresponding to ±3.0 V absolute tolerance or approximately ±9.1% of nominal 33 V. This is specified in the Electrical Characteristics table on page 4 of Rev.6.00 datasheet and applies strictly to the BP grade of the HZ33 type.
Does HZ33BP-E have a specified temperature coefficient?
Yes - Figure 2 on page 5 of the Rev.6.00 datasheet shows the temperature coefficient γZ versus zener voltage, indicating HZ33BP-E exhibits approximately +0.05 %/°C (or +16.5 mV/°C) near 33 V. This positive coefficient means VZ increases slightly with rising temperature, a characteristic confirmed for BP-grade devices in the HZ-P Series.
Can HZ33BP-E be used in surface-mount designs?
No - HZ33BP-E uses a DO-41 axial-leaded glass package intended for through-hole mounting only. It lacks SMD-compatible terminations or tape-and-reel packaging. For surface-mount equivalents, consider SOD-123 or SOD-323 packaged Zeners like MMBZ5257B, though those differ in power rating and VZ tolerance.
What is the maximum nonrepetitive surge power rating for HZ33BP-E?
Per Figure 4 on page 6 of the Rev.6.00 datasheet, HZ33BP-E supports a nonrepetitive surge reverse power (PRSM) of 1.0 W for pulse durations up to 1 second. This rating assumes no heat sinking and is referenced to the DO-41 package's thermal characteristics - critical for transient overvoltage clamping in industrial controls.
How does HZ33BP-E compare to HZ33CP-E in terms of zener voltage?
HZ33CP-E specifies a tighter zener voltage range of 33.0–37.0 V (±2.0 V) at 10 mA, whereas HZ33BP-E is 31.0–35.0 V (±3.0 V). The CP grade offers improved tolerance for applications demanding higher reference accuracy, while HZ33BP-E provides broader coverage for general-purpose clamping where ±3 V is sufficient.
HZ33BP-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:
- -
HZ33BP-E FAQ
1.How can I place an order for HZ33BP-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZ33BP-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 HZ33BP-E reliable?
The price and inventory of HZ33BP-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZ33BP-E is usually 5 days.
3.What payment methods are accepted for HZ33BP-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZ33BP-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZ33BP-E?
HZ33BP-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZ33BP-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 HZ33BP-E?
For technical support, including HZ33BP-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZ33BP-E requirements.
6.How does Aetrix verify that HZ33BP-E is sourced from the original manufacturer or authorized distributors?
All HZ33BP-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 HZ33BP-E meets industry standards.
7.What is the process for return or replacement of HZ33BP-E?
All HZ33BP-E units undergo pre-shipment inspection (PSI). If there is an issue with HZ33BP-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 HZ33BP-E part is unused and in its original packaging.
Return procedure for HZ33BP-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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