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Renesas HZS33NB1TA-E
- Part No.:
- HZS33NB1TA-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZS33NB1TA-E.pdf
- Description:
- DIODE ZENER 0.4W
- Quantity:
- Payment:
- Shipping:
Inventory:8,000
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Product details
Overview
HZS33NB1TA-E from Renesas Electronics is a silicon planar Zener diode designed for precision voltage regulation in low-power stabilized power supplies. It delivers a nominal zener voltage of 31.49–33.11 V at 5 mA test current, with dynamic resistance of 25 Ω, maximum power dissipation of 400 mW, and junction temperature rating up to 200°C. It is used in voltage reference and overvoltage protection circuits for industrial control modules and sensor signal conditioning.
For engineers reviewing the HZS33NB1TA-E datasheet, HZS33NB1TA-E pinout, HZS33NB1TA-E application, or HZS33NB1TA-E equivalent, this page provides verified electrical parameters, package dimensions, thermal derating behavior, zener voltage tolerance grade (B1), and direct alternative options for voltage reference design validation and BOM optimization.
Technical Context
The HZS33NB1TA-E operates as a two-terminal shunt regulator with fixed breakdown voltage defined by its doped silicon junction. Its zener voltage exhibits a positive temperature coefficient above ~5 V, confirmed at +0.04 %/°C per Fig.2 in the datasheet, enabling predictable drift compensation in reference designs.
It is rated for continuous DC operation at Ta = 25°C with 400 mW dissipation, derating linearly to zero at 175°C ambient per Fig.3 - a critical constraint for PCB layout in enclosed enclosures or high-temperature industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 31.49–33.11 V at IZ = 5 mA - defines stable regulation range for mid-range supply rail clamping |
| Dynamic Resistance (rd) | 25 Ω max at IZ = 5 mA - determines output impedance and load regulation sensitivity |
| Power Dissipation (Pd) | 400 mW max at Ta = 25°C - sets absolute thermal limit before derating begins |
| Reverse Current (IR) | 0.2 μA max at VR = 23 V - ensures minimal leakage in standby or high-impedance bias networks |
| Junction Temperature (Tj) | 200°C - enables operation in high-ambient industrial environments when properly heatsinked |
| Storage Temperature | –55 to +175°C - supports extended environmental qualification for non-automotive industrial use |
| Zener Voltage Grade | B1 tolerance band - ±3.2% total variation (31.49–33.11 V) for cost-sensitive, non-critical references |
Pinout & Package
Package: MHD (JEITA code GRZZ0002ZC-A), axial-leaded, 2.0 mm diameter glass body, 26.0 mm length, 0.4 mm lead diameter, 5 mm pitch - optimized for high-speed automatic insertion and wave soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener breakdown terminal | Connected to regulated voltage node; polarity must be observed to avoid forward conduction |
| 2 (Anode) | Reference ground return | Common return path for bias current and load current; establishes reference potential |
Key Features
| Feature | Design Value |
|---|---|
| Low dynamic impedance | 25 Ω max ensures tight regulation under varying load currents in feedback loops |
| Wide zener voltage range | Supports 33 V rail stabilization without external resistor trimming or cascading |
| High junction temperature rating | 200°C allows operation in sealed enclosures or near heat-generating components |
| Standard-grade reliability | Qualified for industrial applications including test equipment and factory automation |
| 5 mm pitch compatibility | Enables automated placement on legacy through-hole PCB assembly lines |
Applications
| Industrial Power Monitoring | Sensor Signal Conditioning |
|---|---|
Use Scenario: Monitoring 36 V DC bus voltage in PLC backplanes using resistive divider + comparator. IC Role / Device Role / Timing Role: Provides precise 33 V reference for comparator threshold setting. Use Value: Enables accurate overvoltage detection within ±3.2% tolerance without calibration. |
Use Scenario: Biasing op-amp input stages in 4–20 mA transmitter circuits powered from 24 V rails. IC Role / Device Role / Timing Role: Stabilizes local 33 V auxiliary supply for precision analog front-end ICs. Use Value: Reduces supply-induced offset drift in current-loop transmitters by >15% vs. unregulated supply. |
| Programmable Logic Controller (PLC) I/O Protection | Test & Measurement Equipment Reference |
Use Scenario: Clamping transient surges on 24 V digital input channels exposed to inductive switching noise. IC Role / Device Role / Timing Role: Acts as shunt overvoltage protector downstream of series current-limiting resistor. Use Value: Limits peak voltage to ≤33.11 V, protecting downstream optocouplers and microcontroller GPIOs. |
Use Scenario: Generating stable reference for 12-bit ADC in bench multimeters requiring <0.5% full-scale accuracy. IC Role / Device Role / Timing Role: Supplies regulated 33 V to voltage reference IC (e.g., REF5030) input stage. Use Value: Improves long-term reference stability by reducing input ripple sensitivity by factor of 4×. |
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 |
|---|---|---|---|
| 1N5261B (ON Semiconductor) | 33 V nominal, ±5% tolerance (wider than HZS33NB1TA-E's ±3.2%), 200 mW Pd, 35 Ω rd | Lower power rating limits use in sustained 5 mA bias applications; suitable only for intermittent reference use | Select when cost is primary and tighter regulation or higher power margin is not required |
| BZX55C33 (Vishay) | 33 V nominal, ±5% tolerance, 500 mW Pd, 35 Ω rd, DO-35 package | Larger DO-35 body increases board space; higher Pd allows greater thermal margin but same regulation performance | Select when higher power headroom is needed and axial lead spacing permits DO-35 footprint |
Compared with 1N5261B and BZX55C33, the HZS33NB1TA-E offers tighter voltage tolerance and lower dynamic resistance in a compact MHD package, making it preferable for space-constrained industrial designs requiring stable 33 V references at moderate power levels.
Availability
HZS33NB1TA-E is available at Aetrix Electronics and suitable for industrial power monitoring, sensor signal conditioning, PLC I/O protection, and test & measurement equipment requiring stable component supply and consistent BOM continuity.
Supply support for HZS33NB1TA-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 manufacturer specializing in microcontrollers, analog and power devices, and system-on-chip solutions for industrial, automotive, and infrastructure markets.
The HZS-N Series Zener diodes were developed for high-reliability voltage stabilization in industrial power supplies and instrumentation, emphasizing low leakage, stable temperature coefficients, and automated assembly compatibility.
FAQ
What is the zener voltage tolerance for HZS33NB1TA-E?
The HZS33NB1TA-E has a B1 grade tolerance, specifying a zener voltage range of 31.49 V to 33.11 V at 5 mA test current. This corresponds to ±3.2% deviation from the nominal 33 V value, verified in the REJ03G0185-0300 datasheet Table on Page 4. The HZS33NB1TA-E achieves tighter regulation than standard ±5% Zeners, supporting more accurate reference designs without trimming.
Does HZS33NB1TA-E support high-temperature operation?
Yes, the HZS33NB1TA-E is rated for junction temperatures up to 200°C and storage temperatures from –55°C to +175°C. Its power dissipation derates linearly from 400 mW at 25°C to zero at 175°C ambient (Fig.3, Page 5). This makes the HZS33NB1TA-E suitable for industrial control cabinets or motor drive subsystems where ambient temperatures exceed 85°C, provided PCB copper area and airflow meet thermal requirements.
What package type does HZS33NB1TA-E use?
HZS33NB1TA-E uses the MHD package (JEITA code GRZZ0002ZC-A): an axial-leaded, glass-encapsulated device with 2.0 mm body diameter, 26.0 mm length, and 5 mm lead pitch. The cathode is marked with a black band. This package is optimized for high-speed automatic insertion and complies with IPC standards for through-hole reliability in industrial manufacturing.
How does the dynamic resistance of HZS33NB1TA-E affect regulation performance?
The HZS33NB1TA-E has a maximum dynamic resistance of 25 Ω at 5 mA, meaning a 1 mA change in zener current causes ≤25 mV output variation. This low rd directly improves load regulation and reduces sensitivity to supply ripple - critical in precision analog circuits. Compared to alternatives like BZX55C33 (35 Ω), the HZS33NB1TA-E delivers measurably tighter voltage stability under dynamic load conditions.
Is HZS33NB1TA-E RoHS compliant?
Yes, HZS33NB1TA-E complies with the EU RoHS Directive, as confirmed by Renesas Electronics' environmental compliance documentation. Lead content is restricted to ≤1000 ppm, and all six RoHS substances (Pb, Cd, Hg, Cr⁶⁺, PBB, PBDE) meet applicable thresholds. Full material declarations and test reports are available upon request from Aetrix Electronics for traceable sourcing in regulated industries.
HZS33NB1TA-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:
- -
HZS33NB1TA-E FAQ
1.How can I place an order for HZS33NB1TA-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZS33NB1TA-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 HZS33NB1TA-E reliable?
The price and inventory of HZS33NB1TA-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZS33NB1TA-E is usually 5 days.
3.What payment methods are accepted for HZS33NB1TA-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZS33NB1TA-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZS33NB1TA-E?
HZS33NB1TA-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZS33NB1TA-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 HZS33NB1TA-E?
For technical support, including HZS33NB1TA-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZS33NB1TA-E requirements.
6.How does Aetrix verify that HZS33NB1TA-E is sourced from the original manufacturer or authorized distributors?
All HZS33NB1TA-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 HZS33NB1TA-E meets industry standards.
7.What is the process for return or replacement of HZS33NB1TA-E?
All HZS33NB1TA-E units undergo pre-shipment inspection (PSI). If there is an issue with HZS33NB1TA-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 HZS33NB1TA-E part is unused and in its original packaging.
Return procedure for HZS33NB1TA-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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