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Renesas HZS33NB2TA-E
- Part No.:
- HZS33NB2TA-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZS33NB2TA-E.pdf
- Description:
- DIODE ZENER 0.4W
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
HZS33NB2TA-E from Renesas Electronics is a silicon planar Zener diode designed for precision voltage regulation in stabilized power supplies, with a nominal zener voltage of 33.11 V (max), dynamic resistance of 25 Ω at 5 mA, and maximum power dissipation of 400 mW. It operates within −55°C to +175°C storage temperature range and features low leakage current (≤0.2 μA at VR = 23 V) for stable reference performance in industrial-grade power rails.
For engineers reviewing the HZS33NB2TA-E datasheet, HZS33NB2TA-E pinout, HZS33NB2TA-E application, or HZS33NB2TA-E equivalent, this device serves as a surface-mount, 2-pin MHD-package Zener diode optimized for high-speed automatic insertion, low-impedance voltage clamping, and thermal-stable biasing in DC-DC converter feedback networks, overvoltage protection circuits, and analog reference subsystems.
Technical Context
The HZS33NB2TA-E implements a planar-diffused silicon junction structure with tightly controlled zener breakdown characteristics across its B2 grade tolerance band (31.49 V to 33.11 V). Its low dynamic resistance (25 Ω) ensures minimal output voltage variation under load transients, while its −55°C to +175°C storage temperature rating supports operation in harsh ambient environments.
Zener voltage temperature coefficient is specified per family curve (Fig.2), with typical γZ ≈ +0.04 %/°C near 33 V - indicating positive drift with temperature - and thermal derating follows a defined curve (Fig.3) where power dissipation drops linearly above 25°C ambient, reaching ~200 mW at 100°C on standard PCB mounting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 31.49 V (min) to 33.11 V (max) at IZ = 5 mA - defines tight regulation window for precision reference use |
| Dynamic Resistance (rd) | 25 Ω max at IZ = 5 mA - enables low-output-impedance voltage stabilization under varying load |
| Power Dissipation (Pd) | 400 mW max at Ta = 25°C - sets thermal design limit for PCB trace width and copper area planning |
| Reverse Leakage (IR) | ≤0.2 μA max at VR = 23 V - ensures minimal quiescent current draw in high-impedance bias networks |
| Junction Temperature (Tj) | 200°C max - allows operation in thermally constrained enclosures with adequate heatsinking |
| Package Type | MHD (JEITA GRZZ0002ZC-A) - 2-pin, axial-lead-compatible surface-mount package for 5 mm-pitch auto-insertion |
Pinout & Package
The HZS33NB2TA-E uses the MHD package: cylindrical glass body, 2.0 mm diameter (φD), 26.0 mm length (L), 0.4 mm lead diameter (φb), mass 0.084 g, with cathode identified by black band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener breakdown terminal | Connected to regulated output node; reverse-biased during normal operation to clamp voltage |
| 2 (Anode) | Reference ground return | Typically tied to system ground or feedback divider low-side; completes zener conduction path |
Key Features
| Feature | Design Value |
|---|---|
| Low zener impedance | 25 Ω max at 5 mA - maintains regulation accuracy under dynamic load steps in power supply feedback loops |
| Wide operating temperature range | −55°C to +175°C storage; 200°C max junction - supports deployment in automotive engine bays and industrial motor drives |
| Tight voltage tolerance (B2 grade) | ±2.5% typical spread around 33 V - reduces need for post-production trimming in voltage reference designs |
| High-speed auto-insertion compatibility | 5 mm pitch, MHD package - enables cost-effective high-volume assembly without reflow or hand-soldering |
Applications
| DC-DC Converter Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Regulating output voltage of isolated flyback or buck converter via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Zener reference providing precise 33 V threshold to drive optocoupler LED in secondary-side regulation. Use Value: Stable 33.11 V breakdown ensures ±1% output regulation despite input line and load variations. |
Use Scenario: Protecting microcontroller I/O pins from transient surges exceeding 30 V in industrial sensor interfaces. IC Role / Device Role / Timing Role: Fast-acting shunt clamp diverting excess energy to ground before damage occurs. Use Value: 25 Ω dynamic resistance limits clamping voltage overshoot to <34 V during 100 ns transients. |
| Analog Reference Biasing | Power Supply Sequencing Monitor |
Use Scenario: Generating stable bias voltage for op-amp input stages in precision instrumentation amplifiers. IC Role / Device Role / Timing Role: Low-leakage (≤0.2 μA) voltage reference establishing fixed common-mode point. Use Value: Minimal current draw avoids loading high-impedance resistor dividers used in gain-setting networks. |
Use Scenario: Detecting undervoltage/overvoltage conditions in multi-rail systems (e.g., 12 V, 3.3 V, 1.8 V) using comparator inputs. IC Role / Device Role / Timing Role: Providing accurate 33 V reference for window comparator thresholds. Use Value: B2-grade tolerance ensures detection window remains within ±0.5 V over temperature and life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C33 (Nexperia) | 33 V nominal, ±5% tolerance (C-grade), SOT-23 package, Pd = 300 mW, rd = 90 Ω | SMT-only, lower power, higher impedance - suitable for low-current bias but not high-accuracy regulation | Select when board space is critical and regulation stability <±2% is acceptable |
| 1N4747A (ON Semiconductor) | 33 V nominal, ±5%, DO-41 through-hole, Pd = 1 W, rd = 35 Ω, Tj = 200°C | Higher power, through-hole only, wider voltage spread - better for surge handling but incompatible with auto-insertion | Select when thermal margin >600 mW is required and manual or wave soldering is available |
Compared with BZX84-C33 and 1N4747A, the HZS33NB2TA-E delivers tighter voltage tolerance (±2.5% vs. ±5%), lower dynamic resistance (25 Ω vs. 35–90 Ω), and MHD packaging optimized for automated production - making it preferred for high-yield, precision-stabilized power supply designs requiring repeatable performance across temperature and volume.
Availability
HZS33NB2TA-E is available at Aetrix Electronics and suitable for industrial power supplies, embedded sensor signal conditioning, and automotive body control modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for HZS33NB2TA-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 SoC solutions for automotive, industrial, and IoT applications.
The HZS-N Series was developed specifically for high-reliability, low-drift voltage stabilization in industrial and consumer power management systems - emphasizing manufacturability, thermal robustness, and tight parametric control.
FAQ
What is the exact zener voltage range for HZS33NB2TA-E at 5 mA test current?
The HZS33NB2TA-E has a guaranteed zener voltage range of 31.49 V (minimum) to 33.11 V (maximum) when tested at IZ = 5 mA and Ta = 25°C, per its B2 grade specification in the Renesas HZS-N Series datasheet (REJ03G0185-0300 Rev.3.00). This 1.62 V span reflects ±2.5% tolerance centered near 32.3 V, enabling predictable regulation without post-manufacturing calibration.
Does HZS33NB2TA-E support surface-mount assembly, and what is its package footprint?
Yes, HZS33NB2TA-E uses the MHD package (JEITA code GRZZ0002ZC-A), a surface-mount cylindrical package with 2.0 mm diameter, 26.0 mm length, and 5 mm pitch - explicitly designed for high-speed automatic insertion equipment. Its leads are tinned and compatible with standard reflow profiles, eliminating need for through-hole drilling or wave soldering.
What is the maximum reverse leakage current specification for HZS33NB2TA-E, and at what voltage is it measured?
The maximum reverse leakage current for HZS33NB2TA-E is 0.2 μA, measured at VR = 23 V (70% of nominal zener voltage) and Ta = 25°C. This ultra-low leakage ensures minimal error contribution in high-impedance reference divider networks and preserves battery life in always-on monitoring circuits.
How does the dynamic resistance of HZS33NB2TA-E affect its performance in voltage regulation circuits?
The HZS33NB2TA-E has a maximum dynamic resistance of 25 Ω at IZ = 5 mA, meaning a 1 mA change in zener current causes ≤25 mV output variation. This low rd directly improves load regulation in feedback networks and reduces sensitivity to input ripple - critical for maintaining ±0.5% output stability in switching power supplies.
Is HZS33NB2TA-E rated for automotive applications, and what quality grade does it carry?
HZS33NB2TA-E is classified as "Standard" quality grade per Renesas documentation, intended for office equipment, communications gear, industrial robots, and home appliances - not for automotive safety-critical or life-support systems. It is not AEC-Q200 qualified, and Renesas explicitly states that non-automotive-grade parts require prior written consent for use in transportation equipment.
HZS33NB2TA-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:
- -
HZS33NB2TA-E FAQ
1.How can I place an order for HZS33NB2TA-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZS33NB2TA-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 HZS33NB2TA-E reliable?
The price and inventory of HZS33NB2TA-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZS33NB2TA-E is usually 5 days.
3.What payment methods are accepted for HZS33NB2TA-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZS33NB2TA-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZS33NB2TA-E?
HZS33NB2TA-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZS33NB2TA-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 HZS33NB2TA-E?
For technical support, including HZS33NB2TA-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZS33NB2TA-E requirements.
6.How does Aetrix verify that HZS33NB2TA-E is sourced from the original manufacturer or authorized distributors?
All HZS33NB2TA-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 HZS33NB2TA-E meets industry standards.
7.What is the process for return or replacement of HZS33NB2TA-E?
All HZS33NB2TA-E units undergo pre-shipment inspection (PSI). If there is an issue with HZS33NB2TA-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 HZS33NB2TA-E part is unused and in its original packaging.
Return procedure for HZS33NB2TA-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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