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Renesas HZU33BTRF-E
- Part No.:
- HZU33BTRF-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZU33BTRF-E.pdf
- Description:
- DIODE ZENER
- Quantity:
- Payment:
- Shipping:
Inventory:24,000
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Product details
Overview
HZU33BTRF-E from Renesas Electronics is a silicon planar Zener diode designed for precision voltage stabilization in low-power analog and reference circuits, featuring a nominal Zener voltage of 33 V (min 31.0 V, max 35.0 V at 2 mA), 200 mW power dissipation, and ultra-small URP (SC-76A) surface-mount package. It delivers stable regulation in power supply feedback paths, overvoltage protection clamps, and voltage reference nodes for industrial sensors and instrumentation.
For engineers reviewing the HZU33BTRF-E datasheet, HZU33BTRF-E pinout, HZU33BTRF-E application, or HZU33BTRF-E equivalent, key selection criteria include its ±3.0 V Zener tolerance at 2 mA, 80 Ω dynamic resistance, –55 to +150 °C storage temperature range, and compatibility with automated SMT assembly due to TRF taping (3,000 pcs/reel).
Technical Context
This device operates as a two-terminal shunt regulator, maintaining a stable reverse-biased breakdown voltage across its cathode-anode terminals under controlled test current (IZ = 2 mA). Its silicon planar construction ensures repeatable Zener characteristics and low leakage, with junction temperature limited to 150 °C for reliable long-term operation.
The URP (SC-76A) package enables high-density PCB layouts and thermal performance suitable for ambient temperatures up to 80 °C at full rated power. Its marking "33•" identifies the HZU33B variant, and the B grade denotes a single-tolerance band (31.0–35.0 V) without sub-grades (B1/B2/B3).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 31.0 V to 35.0 V at IZ = 2 mA - defines stable regulation window for reference or clamp use |
| Power Dissipation (Pd) | 200 mW at Ta = 25 °C - sets maximum continuous power handling before thermal derating |
| Dynamic Resistance (rd) | 80 Ω at IZ = 2 mA - indicates voltage regulation stiffness against load current variation |
| Reverse Current (IR) | 2 µA max at VR = 25.0 V - confirms low leakage below breakdown, critical for standby power integrity |
| Junction Temperature (Tj) | 150 °C maximum - constrains thermal design margin for PCB copper area and airflow |
| Package | URP (SC-76A), 0.8 mm × 1.5 mm footprint - supports 0402-class board space and reflow compatibility |
| Taping | TRF format, 3,000 pcs per reel - enables pick-and-place integration without manual handling |
Pinout & Package
URP (SC-76A) is an ultra-small surface-mount plastic package with two gull-wing leads, optimized for high-density PCB layouts and automated assembly. The package measures 0.8 mm (width) × 1.5 mm (length) × 0.9 mm (height), with typical mass of 0.004 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode | Connected to higher-potential node in shunt regulation; carries reverse current during Zener conduction |
| 2 | Anode | Connected to lower-potential node (typically ground or return); completes bias path for breakdown operation |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small URP package | 0.8 mm × 1.5 mm footprint enables miniaturized power management and sensor reference designs |
| Stable Zener voltage tolerance | ±3.0 V (31.0–35.0 V) at 2 mA ensures predictable clamping level without external trimming |
| Low dynamic impedance | 80 Ω maintains tight output voltage regulation under varying load conditions |
| Taped delivery (TRF) | 3,000-unit reels support high-throughput SMT placement with zero manual intervention |
| Wide operating temperature | –55 to +150 °C storage range allows use in harsh industrial and automotive under-hood environments |
Applications
| Voltage Reference for ADCs | Overvoltage Clamp in Power Supplies |
|---|---|
|
Use Scenario: Providing a stable 33 V reference to the voltage reference input of 12-bit or 16-bit analog-to-digital converters in data acquisition modules. IC Role / Device Role / Timing Role: Shunt voltage reference source, absorbing excess current to hold reference node at precise potential. Use Value: Enables <1 LSB error in mid-scale measurements by minimizing reference drift across temperature and line variations. |
Use Scenario: Protecting downstream DC-DC converter ICs and microcontrollers from transient overvoltage events on 24 V industrial bus lines. IC Role / Device Role / Timing Role: Fast-acting shunt clamp that conducts above 35 V to divert surge energy away from sensitive loads. Use Value: Limits peak voltage to ≤35 V during 100 ns–1 µs transients, preventing latch-up or gate oxide damage in connected ICs. |
| Current Source Biasing | Signal Level Translation |
|
Use Scenario: Establishing a constant current through a high-impedance sensor bridge (e.g., strain gauge or RTD) using a series resistor and HZU33BTRF-E reference. IC Role / Device Role / Timing Role: Fixed-voltage node enabling Ohm's Law-based current generation independent of supply fluctuations. Use Value: Delivers <±0.5% current stability over 0–70 °C, improving sensor measurement repeatability without active regulation. |
Use Scenario: Translating a 33 V logic-level signal to a 5 V or 3.3 V domain using a resistive divider anchored to the HZU33BTRF-E cathode. IC Role / Device Role / Timing Role: Precision voltage anchor point ensuring accurate scaling ratio and minimal offset error. Use Value: Maintains divider accuracy within ±1.5% over temperature, eliminating need for calibration trimmers in factory-set interfaces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage stabilization applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C33 (Diodes Inc.) | Same 33 V nominal Zener, but SOT-23 package (larger footprint, 2.9 mm × 1.3 mm) and 300 mW Pd | Higher power margin suits higher-current clamping; less space-constrained layouts | Select when board area permits larger package and >200 mW dissipation is required |
| MMSZ5257ET1G (ON Semiconductor) | 33 V Zener in SOD-123 package (1.8 mm × 1.4 mm), 500 mW rating, tighter 5% tolerance (31.35–34.65 V) | Higher power and tighter tolerance support precision references where 33 V ±1.65 V is acceptable | Select when tighter initial tolerance and higher surge capability are prioritized over smallest size |
Compared with BZX84-C33 and MMSZ5257ET1G, the HZU33BTRF-E offers the smallest PCB footprint (URP/SC-76A) and is optimized for ultra-compact, low-power stabilization-ideal where board space is constrained and 200 mW suffices, whereas alternatives trade size for power or tolerance.
Availability
HZU33BTRF-E is available at Aetrix Electronics and suitable for industrial sensor interfaces, portable instrumentation power rails, and embedded system voltage reference circuits requiring stable component supply and consistent tape-and-reel delivery.
Supply support for HZU33BTRF-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 delivering microcontrollers, analog, power, and timing solutions for industrial, automotive, and infrastructure markets.
The HZU Series is a family of silicon planar Zener diodes engineered for compact, high-reliability voltage stabilization in space-constrained analog subsystems and power management blocks.
FAQ
What is the Zener voltage tolerance of HZU33BTRF-E at 2 mA test current?
The HZU33BTRF-E has a Zener voltage range of 31.0 V to 35.0 V when tested at IZ = 2 mA, corresponding to a ±3.0 V absolute tolerance. This B-grade specification is confirmed in the Electrical Characteristics table on page 2 of the R07DS0423EJ1000 datasheet and applies specifically to the HZU33BTRF-E variant.
Does HZU33BTRF-E support reflow soldering, and what is its maximum junction temperature?
Yes, the HZU33BTRF-E is qualified for standard lead-free reflow soldering profiles due to its URP (SC-76A) thermoplastic package. Its absolute maximum junction temperature is 150 °C, as specified in the Absolute Maximum Ratings table. Designers must ensure PCB thermal relief and ambient conditions keep Tj within this limit during continuous operation.
What does the "TRF" suffix indicate in HZU33BTRF-E?
The "TRF" suffix in HZU33BTRF-E denotes tape-and-reel packaging per Renesas' ordering convention: TRF means the device is supplied on 3,000-piece reels compatible with automated SMT pick-and-place equipment. This is distinct from bulk or ammo-pack options and is explicitly defined in the Ordering Information section of the datasheet.
How does the dynamic resistance of HZU33BTRF-E affect voltage regulation stability?
The HZU33BTRF-E exhibits 80 Ω dynamic resistance (rd) at IZ = 2 mA, meaning a 1 mA change in Zener current causes approximately 80 mV shift in output voltage. This value directly impacts regulation accuracy in variable-load applications-lower rd yields tighter voltage control, making HZU33BTRF-E suitable for moderate-stability references where active regulators are unnecessary.
Is HZU33BTRF-E RoHS compliant and halogen-free?
Yes, HZU33BTRF-E complies with the EU RoHS Directive, as confirmed by Renesas' environmental compliance documentation. The device uses lead-free terminations and halogen-free molding compound, aligning with JEDEC standards for green electronics manufacturing. Full material declarations are available via Renesas' product environmental reports.
HZU33BTRF-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:
- -
HZU33BTRF-E FAQ
1.How can I place an order for HZU33BTRF-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZU33BTRF-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 HZU33BTRF-E reliable?
The price and inventory of HZU33BTRF-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZU33BTRF-E is usually 5 days.
3.What payment methods are accepted for HZU33BTRF-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZU33BTRF-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZU33BTRF-E?
HZU33BTRF-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZU33BTRF-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 HZU33BTRF-E?
For technical support, including HZU33BTRF-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZU33BTRF-E requirements.
6.How does Aetrix verify that HZU33BTRF-E is sourced from the original manufacturer or authorized distributors?
All HZU33BTRF-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 HZU33BTRF-E meets industry standards.
7.What is the process for return or replacement of HZU33BTRF-E?
All HZU33BTRF-E units undergo pre-shipment inspection (PSI). If there is an issue with HZU33BTRF-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 HZU33BTRF-E part is unused and in its original packaging.
Return procedure for HZU33BTRF-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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