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Renesas HZ30-3-E
- Part No.:
- HZ30-3-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
HZ30-3-E.pdf
- Description:
- DIODE ZENER 30V 500MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:14,500
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Product details
Overview
HZ30-3-E from Renesas is a silicon planar Zener diode designed for precision voltage regulation in stabilized power supplies, featuring a nominal zener voltage of 30.2–31.6 V at 2 mA test current, 500 mW power dissipation, and low dynamic resistance of 23 Ω - deployed in industrial DC-DC feedback loops and reference circuits.
For engineers reviewing the HZ30-3-E datasheet, HZ30-3-E pinout, HZ30-3-E application, or HZ30-3-E equivalent, key selection criteria include zener voltage tolerance (±2.3% at 30.2–31.6 V), temperature coefficient (−0.04%/°C), DO-35 package compatibility, and reverse leakage performance under 1 µA at VR = 23.3 V.
Technical Context
The HZ30-3-E operates as a two-terminal shunt regulator with cathode-anode polarity, optimized for DC-stable biasing where precise, low-drift voltage references are required. Its junction temperature rating of 175°C supports operation in thermally demanding environments.
Zener voltage is specified at IZ = 2 mA with a maximum dynamic resistance of 23 Ω, ensuring stable regulation under varying load conditions. The −0.04%/°C temperature coefficient minimizes drift across ambient temperatures from −55°C to +175°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 30.2–31.6 V at IZ = 2 mA - defines regulated output voltage range in shunt configuration |
| Power Dissipation (Pd) | 500 mW - sets maximum continuous thermal load without derating below 25°C ambient |
| Dynamic Resistance (rd) | 23 Ω max at IZ = 2 mA - determines regulation stiffness against current variation |
| Reverse Leakage (IR) | <1 µA at VR = 23.3 V - ensures minimal quiescent current in standby or high-impedance nodes |
| Temperature Coefficient | −0.04%/°C - enables predictable, low-drift behavior over industrial temperature range |
| Junction Temperature (Tj) | 175°C max - allows reliable operation in enclosed or high-ambient thermal environments |
Pinout & Package
Package: DO-35 glass axial lead package (JEITA code GRZZ0002ZB-A), 2.0 mm diameter × 26.0 mm length, 0.13 g mass, navy blue cathode band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Regulated voltage reference node | Connected to higher-potential side of series resistor; sinks current to maintain VZ across load |
| 2 (Anode) | Reference ground return path | Connected to circuit common; completes shunt regulation loop with cathode |
Key Features
| Feature | Design Value |
|---|---|
| Low dynamic impedance | 23 Ω max ensures tight voltage regulation under ±10% current variation in feedback networks |
| Wide zener voltage range coverage | Part of HZ Series spanning 1.6–38 V - enables single-source design flexibility across multiple supply rails |
| Stable temperature coefficient | −0.04%/°C minimizes output drift in automotive or industrial enclosures with wide ambient swings |
| High junction temperature rating | 175°C Tj max supports use in sealed power modules without forced cooling |
Applications
| Industrial Power Supply Reference | DC-DC Converter Feedback Node |
|---|---|
Use Scenario: Precision voltage reference in linear regulators powering PLC I/O modules. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 30.2–31.6 V setpoint for error amplifier input. Use Value: Enables ±1% output regulation accuracy over −40°C to +85°C ambient due to low tempco and tight VZ tolerance. | Use Scenario: Secondary-side voltage sensing in isolated flyback converters for telecom equipment. IC Role / Device Role / Timing Role: Zener clamp on optocoupler LED anode to fix feedback threshold. Use Value: Maintains consistent cross-regulation across multiple outputs by stabilizing opto bias point despite input ripple. |
| Overvoltage Protection Clamp | Calibration Voltage Standard |
Use Scenario: Transient suppression on 24 V sensor bus lines exposed to inductive switching noise. IC Role / Device Role / Timing Role: Passive clamping element diverting surge current above 31.6 V to ground. Use Value: Limits peak voltage to ≤32 V with <1 µA leakage at 23.3 V - preserves signal integrity without loading active circuitry. | Use Scenario: Factory calibration reference for handheld multimeters requiring traceable 30 V benchmarks. IC Role / Device Role / Timing Role: Stable, low-drift DC reference source during automated test fixture sequencing. Use Value: Delivers <±0.1% long-term stability under controlled lab conditions due to low rd and minimal self-heating at 2 mA. |
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 |
|---|---|---|---|
| 1N4749A | Zener voltage 27 V (±5%), Pd = 1 W, DO-41 package, rd = 10 Ω | Higher power and lower impedance but 3 V lower nominal VZ; requires circuit recalibration | Select when higher power margin and tighter regulation are needed, and 27 V is acceptable system reference |
| BZX55C30 | Zener voltage 30 V (±5%), Pd = 500 mW, DO-35 package, rd = 35 Ω, TC = +0.06%/°C | Same package and nominal voltage but wider VZ tolerance and positive tempco increases drift risk | Choose for cost-sensitive designs where ±5% VZ and higher rd are acceptable trade-offs |
Compared with 1N4749A and BZX55C30, the HZ30-3-E offers tighter voltage tolerance (±2.3% vs. ±5%), superior temperature stability (−0.04%/°C vs. +0.06%/°C), and DO-35 compatibility - making it optimal for precision industrial references where drift and calibration stability are critical.
Availability
HZ30-3-E is available at Aetrix Electronics and suitable for industrial power supply reference, DC-DC converter feedback node, and overvoltage protection clamp applications requiring stable component supply, long-lifecycle support, and traceable sourcing.
Supply support for HZ30-3-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 automotive, industrial, and infrastructure markets.
The HZ Series Zener diodes are engineered for high-precision, low-drift voltage stabilization in industrial and telecom power systems - emphasizing tight VZ tolerance, stable temperature coefficients, and robust thermal performance.
FAQ
What is the exact zener voltage range for HZ30-3-E?
The HZ30-3-E has a guaranteed zener voltage range of 30.2 V to 31.6 V when tested at IZ = 2 mA and Ta = 25°C. This ±2.3% tolerance is tighter than standard Zener diodes like BZX55C30 (±5%), supporting higher-accuracy regulation in feedback and reference circuits.
What package type does HZ30-3-E use and how is polarity identified?
HZ30-3-E uses the DO-35 glass axial package (JEITA code GRZZ0002ZB-A) with a navy blue cathode band marking terminal 1. Pin 1 is cathode and must be connected toward the higher potential side of the series resistor in shunt regulator configurations.
What is the maximum reverse leakage current for HZ30-3-E and under what condition?
The HZ30-3-E exhibits a maximum reverse leakage current of 1 µA at VR = 23.3 V and Ta = 25°C. This ultra-low leakage supports high-impedance bias networks and minimizes error in precision reference applications where load currents are sub-microampere.
How does the temperature coefficient of HZ30-3-E affect its performance in industrial environments?
The HZ30-3-E has a temperature coefficient of −0.04%/°C, meaning its zener voltage decreases by approximately 12 mV per 10°C rise near 30 V. This low, predictable drift enables stable operation from −55°C to +125°C ambient without external compensation in industrial control and instrumentation systems.
Can HZ30-3-E replace BZX55C30 in existing designs without layout changes?
Yes - HZ30-3-E shares the DO-35 package, identical pinout (cathode/anode), and same 500 mW power rating as BZX55C30, enabling direct PCB-level replacement. However, its tighter VZ tolerance (±2.3% vs. ±5%) and negative tempco (−0.04%/°C vs. +0.06%/°C) may improve regulation accuracy and thermal stability without hardware modification.
HZ30-3-E Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- HZ
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 30 V
- Tolerance:
- ±2.33%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 18 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 23 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-35
HZ30-3-E FAQ
1.How can I place an order for HZ30-3-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZ30-3-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 HZ30-3-E reliable?
The price and inventory of HZ30-3-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZ30-3-E is usually 5 days.
3.What payment methods are accepted for HZ30-3-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZ30-3-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZ30-3-E?
HZ30-3-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZ30-3-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 HZ30-3-E?
For technical support, including HZ30-3-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZ30-3-E requirements.
6.How does Aetrix verify that HZ30-3-E is sourced from the original manufacturer or authorized distributors?
All HZ30-3-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 HZ30-3-E meets industry standards.
7.What is the process for return or replacement of HZ30-3-E?
All HZ30-3-E units undergo pre-shipment inspection (PSI). If there is an issue with HZ30-3-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 HZ30-3-E part is unused and in its original packaging.
Return procedure for HZ30-3-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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