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Renesas HZS33-2LRX-E
- Part No.:
- HZS33-2LRX-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZS33-2LRX-E.pdf
- Description:
- DIODE ZENER
- Quantity:
- Payment:
- Shipping:
Inventory:20,000
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Product details
Overview
HZS33-2LRX-E from ROHM Semiconductor is a silicon epitaxial planar Zener diode designed for precision voltage regulation in stabilized power supplies. It delivers a nominal zener voltage of 32.2–33.6 V at 2 mA test current, with dynamic resistance ≤120 Ω, maximum power dissipation of 400 mW, and junction temperature rating up to 200°C - enabling use in industrial DC-DC reference stages and overvoltage clamp circuits.
For engineers reviewing the HZS33-2LRX-E datasheet, HZS33-2LRX-E pinout, HZS33-2LRX-E application, or HZS33-2LRX-E equivalent, key selection criteria include verified zener voltage tolerance (±3.1% at mid-grade), low leakage (<1 µA at VR = 25 V), temperature coefficient behavior near +0.05%/°C, and compatibility with 5 mm-pitch automated insertion equipment.
Technical Context
This device operates as a two-terminal voltage reference using controlled avalanche breakdown in a silicon epitaxial planar structure. Its zener voltage is specified at IZ = 2 mA with tight min/max bounds (32.2 V to 33.6 V), and it exhibits low dynamic impedance (≤120 Ω) critical for ripple suppression in feedback loops.
The HZS33-2LRX-E is rated for continuous operation up to 200°C junction temperature and supports storage across –55°C to +175°C. Its thermal derating follows a linear 400 mW → 0 mW reduction between 25°C and 180°C ambient on standard FR-4 PCB with 2.5 mm × 3 mm pad layout per JEDEC MS-001.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 32.2 V to 33.6 V at IZ = 2 mA - defines stable regulation window for 33 V rail references |
| Dynamic Resistance (rd) | ≤120 Ω at IZ = 2 mA - ensures <10 mV output shift under ±1 mA load transients |
| Power Dissipation (Pd) | 400 mW at Ta = 25°C - supports compact board layouts without forced cooling |
| Reverse Leakage (IR) | ≤1 µA at VR = 25 V - minimizes quiescent current in high-impedance bias networks |
| Junction Temperature (Tj) | 200°C max - enables deployment in under-hood automotive or enclosed industrial enclosures |
| Temperature Coefficient | +0.05%/°C typical near 33 V - reduces drift to ~±15 mV over –40°C to +85°C ambient |
Pinout & Package
Package: DO-35 glass axial package (2.5 mm diameter × 4.5 mm length), cathode band marked, lead pitch 5 mm - optimized for high-speed automatic insertion.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated positive rail; reverse-biased terminal during normal operation |
| 2 (Non-banded End) | Anode | Connected to ground or lower-potential node; completes conduction path during zener breakdown |
Key Features
| Feature | Design Value |
|---|---|
| Low zener impedance | ≤120 Ω enables stable regulation under dynamic load steps in feedback divider networks |
| High power density | 400 mW in DO-35 allows replacement of larger packages without layout change |
| Tight voltage grading | Grade "2" (32.2–33.6 V) provides ±3.1% tolerance - suitable for ±5% supply monitoring |
| Automated assembly support | 5 mm lead pitch and axial symmetry meet IPC-7351 requirements for high-yield pick-and-place |
Applications
| Industrial Power Monitor | Automotive ECU Reference |
|---|---|
Use Scenario: Monitoring 33 V battery-fed subsystems in factory automation controllers. IC Role / Device Role / Timing Role: Zener diode providing stable 33 V reference for ADC input scaling and comparator threshold setting. Use Value: Low dynamic resistance (≤120 Ω) maintains reference accuracy despite ripple from switching regulators. | Use Scenario: Clamp protection for LIN bus transceiver VCC pins exposed to load-dump transients. IC Role / Device Role / Timing Role: Overvoltage clamp limiting supply rail to 33.6 V during 40 V/100 ms pulses. Use Value: 200°C junction rating ensures reliability in engine compartment environments. |
| Programmable Logic Supply | Test Equipment Calibration |
Use Scenario: Biasing voltage reference for FPGA configuration EEPROMs requiring precise 33 V programming voltage. IC Role / Device Role / Timing Role: Precision shunt regulator establishing clean 33 V programming rail independent of main SMPS output. Use Value: ≤1 µA leakage at 25 V prevents unintended discharge of hold-up capacitors during standby. | Use Scenario: Fixed-voltage calibration point in portable multimeter front-end circuitry. IC Role / Device Role / Timing Role: Stable 33 V reference source for auto-ranging DAC offset trimming. Use Value: +0.05%/°C tempco limits calibration drift to <±0.5% over operating temperature range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4747A | Zener voltage 20 V, Pd = 1 W, DO-41 package, ±5% tolerance | Higher power but wider voltage tolerance; unsuitable for tight 33 V references | Select only if 20 V regulation and higher surge capability are required |
| BZX55C33 | Zener voltage 33 V ±5%, Pd = 500 mW, DO-35, rd ≈ 35 Ω at 5 mA | Lower impedance but looser grading; requires recalibration of feedback dividers | Prefer when lower dynamic impedance outweighs tighter voltage binning needs |
Compared with HZS33-2LRX-E, the 1N4747A offers higher power but mismatches the 33 V target and lacks grade-specific tight tolerance, while BZX55C33 trades guaranteed 32.2–33.6 V range for marginally better impedance - making HZS33-2LRX-E optimal for designs demanding both precision and thermal robustness.
Availability
HZS33-2LRX-E is available at Aetrix Electronics and suitable for industrial power monitors, automotive ECU references, and programmable logic supply circuits requiring stable component supply with full traceability and long-term lifecycle assurance.
Supply support for HZS33-2LRX-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
ROHM Semiconductor is a Japanese semiconductor manufacturer specializing in analog, power, and sensor solutions for automotive, industrial, and consumer systems.
The HZS Series targets high-reliability voltage stabilization in space-constrained, thermally demanding applications - emphasizing low leakage, graded zener voltage bins, and automated assembly compatibility.
FAQ
What is the exact zener voltage range for HZS33-2LRX-E?
The HZS33-2LRX-E has a guaranteed zener voltage range of 32.2 V to 33.6 V when tested at IZ = 2 mA and Ta = 25°C. This "Grade 2" binning reflects ±3.1% tolerance around the nominal 33 V point, confirmed in ROHM's ADE-208-120A(Z) datasheet Rev 1, page 5.
Is HZS33-2LRX-E suitable for surface-mount reflow assembly?
No - HZS33-2LRX-E uses a DO-35 glass axial package with radial leads intended for through-hole mounting and wave soldering or hand-soldering. It is not rated for SMT reflow profiles. For SMT alternatives, consider ROHM's UDZS series Schottky Zeners in SOD-323.
What is the maximum reverse leakage current for HZS33-2LRX-E?
The maximum reverse leakage current for HZS33-2LRX-E is 1 µA at VR = 25 V and Ta = 25°C, as specified in the Electrical Characteristics table on page 5 of the official datasheet. This low leakage supports high-impedance bias networks without significant error contribution.
Does HZS33-2LRX-E have a specified temperature coefficient?
Yes - the HZS33-2LRX-E exhibits a typical temperature coefficient of +0.05%/°C near its 33 V operating point, as shown in Figure 2 of the datasheet. This value is derived from the slope of VZ vs. temperature curves for HZS33-grade devices and supports drift prediction in thermal design.
Can HZS33-2LRX-E replace older HZS33-2 models without design changes?
Yes - HZS33-2LRX-E maintains identical electrical specifications, DO-35 package dimensions, and pinout (cathode band marking) as prior HZS33-2 variants. The "RX-E" suffix denotes ROHM's enhanced reliability screening and traceable lot control, with no functional or mechanical deviation from legacy HZS33-2 units.
HZS33-2LRX-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:
- -
HZS33-2LRX-E FAQ
1.How can I place an order for HZS33-2LRX-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZS33-2LRX-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 HZS33-2LRX-E reliable?
The price and inventory of HZS33-2LRX-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZS33-2LRX-E is usually 5 days.
3.What payment methods are accepted for HZS33-2LRX-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZS33-2LRX-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZS33-2LRX-E?
HZS33-2LRX-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZS33-2LRX-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 HZS33-2LRX-E?
For technical support, including HZS33-2LRX-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZS33-2LRX-E requirements.
6.How does Aetrix verify that HZS33-2LRX-E is sourced from the original manufacturer or authorized distributors?
All HZS33-2LRX-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 HZS33-2LRX-E meets industry standards.
7.What is the process for return or replacement of HZS33-2LRX-E?
All HZS33-2LRX-E units undergo pre-shipment inspection (PSI). If there is an issue with HZS33-2LRX-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 HZS33-2LRX-E part is unused and in its original packaging.
Return procedure for HZS33-2LRX-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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