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Renesas HZ22-1-E
- Part No.:
- HZ22-1-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
HZ22-1-E.pdf
- Description:
- DIODE ZENER 22V 500MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:19,500
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Product details
Overview
HZ22-1-E from Renesas is a silicon planar Zener diode designed for precision voltage regulation in stabilized power supplies, with a nominal zener voltage of 22.0 V (min 21.6 V, max 22.6 V), 500 mW power dissipation, and low dynamic resistance of 17.0 Ω at 2 mA test current. It operates reliably across −55°C to +175°C and is housed in a DO-35 glass package.
For engineers reviewing the HZ22-1-E datasheet, HZ22-1-E pinout, HZ22-1-E application, or HZ22-1-E equivalent, key selection criteria include zener voltage tolerance (±2.3% at 22 V), temperature coefficient (−0.04 %/°C), junction temperature limit (175°C), and DO-35 mechanical compatibility for through-hole PCB layouts.
Technical Context
The HZ22-1-E uses a silicon planar junction structure optimized for stable reverse-bias operation, achieving low leakage current (<1 µA at VR = 17.5 V) and tightly controlled zener voltage distribution within Grade 1 tolerance band. Its thermal design supports junction temperatures up to 175°C, enabling use in high-ambient industrial environments.
Dynamic resistance remains stable at 17.0 Ω under 2 mA zener current, ensuring consistent regulation performance across load transients. The device is characterized with DC testing per JEITA standards and exhibits a negative temperature coefficient of −0.04 %/°C, typical for mid-voltage Zeners in the 20–24 V range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 21.6 V min / 22.6 V max at IZ = 2 mA - defines regulation setpoint with ±2.3% tolerance for feedback loop accuracy |
| Power Dissipation (Pd) | 500 mW at Ta = 25°C - sets maximum continuous power handling before thermal derating begins |
| Dynamic Resistance (rd) | 17.0 Ω at IZ = 2 mA - determines output impedance and load regulation sensitivity |
| Reverse Current (IR) | <1 µA at VR = 17.5 V - ensures minimal standby power loss in shunt regulator topologies |
| Junction Temperature (Tj) | −55°C to +175°C - enables deployment in automotive under-hood or industrial motor control enclosures |
| Temperature Coefficient (γZ) | −0.04 %/°C - quantifies voltage drift over temperature, critical for precision reference stability |
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, cathode identified by navy blue band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (banded end) | Cathode | Connected to regulated output node in shunt configuration; polarity must be observed to avoid forward conduction |
| 2 (non-banded end) | Anode | Connected to ground or common reference; completes reverse-bias path for zener operation |
Key Features
| Feature | Design Value |
|---|---|
| Low dynamic impedance | 17.0 Ω at 2 mA enables tight voltage regulation under varying load conditions |
| Wide operating temperature range | −55°C to +175°C junction rating supports reliability in harsh thermal environments |
| Tight zener voltage tolerance | Grade 1 binning (±2.3%) reduces need for external trimming in fixed-reference designs |
| Low leakage current | <1 µA at 17.5 V ensures minimal quiescent power draw in battery-backed systems |
Applications
| Voltage Reference for Op-Amp Circuits | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Providing stable 22 V reference input to instrumentation amplifier stages in data acquisition front-ends. IC Role / Device Role / Timing Role: Precision shunt voltage reference establishing DC bias point for analog signal conditioning. Use Value: Low 17.0 Ω dynamic resistance minimizes reference error during sensor excitation current variations. | Use Scenario: Clamping transient surges on 24 V industrial control bus lines exposed to inductive switching noise. IC Role / Device Role / Timing Role: Passive overvoltage clamp limiting rail voltage to 22.6 V maximum during ESD or load dump events. Use Value: 500 mW power rating allows absorption of short-duration 100 ms transients without failure. |
| DC-DC Converter Feedback Divider | Microcontroller Reset Circuit |
Use Scenario: Setting output voltage of isolated flyback converter via optocoupler-coupled feedback network. IC Role / Device Role / Timing Role: Zener-based reference replacing TL431 where cost and simplicity are prioritized over adjustable threshold. Use Value: Fixed 22 V rating simplifies resistor divider design and eliminates external adjustment components. | Use Scenario: Generating clean reset pulse for 3.3 V microcontrollers powered from unregulated 24 V supply rails. IC Role / Device Role / Timing Role: Shunt regulator feeding RC delay network to hold reset active until supply stabilizes above 22 V threshold. Use Value: −0.04 %/°C temperature coefficient ensures reset threshold remains stable across −40°C to +85°C ambient. |
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 |
|---|---|---|---|
| 1N4748A | 22 V nominal, ±5% tolerance, 500 mW, DO-41 package, rd = 22 Ω at 19 mA | Higher dynamic resistance and looser tolerance reduce regulation accuracy in precision references | Select when DO-41 footprint is required and ±5% voltage tolerance is acceptable |
| BZX55C22 | 22 V nominal, ±5% tolerance, 500 mW, DO-35 package, rd = 25 Ω at 5 mA | Same DO-35 form factor but higher impedance and wider voltage spread limit low-current stability | Choose for legacy BOM continuity where Grade 1 binning is not needed |
Compared with 1N4748A and BZX55C22, the HZ22-1-E delivers tighter voltage tolerance (±2.3% vs. ±5%), lower dynamic resistance (17.0 Ω vs. ≥22 Ω), and superior temperature stability (−0.04 %/°C), making it preferred for high-accuracy shunt references and low-power sensing interfaces.
Availability
HZ22-1-E is available at Aetrix Electronics and suitable for stabilized power supplies, overvoltage protection circuits, and precision voltage reference designs requiring stable component supply and long-term obsolescence management.
Supply support for HZ22-1-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 IoT applications.
The HZ Series Zener diodes are engineered for high-reliability voltage stabilization in industrial power supplies and embedded system references, emphasizing low leakage, tight grading, and extended temperature capability.
FAQ
What is the exact zener voltage range specified for HZ22-1-E?
The HZ22-1-E has a guaranteed zener voltage range of 21.6 V minimum to 22.6 V maximum when tested at IZ = 2 mA and Ta = 25°C. This Grade 1 tolerance corresponds to ±2.3% around the nominal 22.0 V rating, confirmed in Renesas document REJ03G0180-0600 page 4.
Is HZ22-1-E compatible with standard DO-35 footprints?
Yes, HZ22-1-E uses the DO-35 glass axial package (JEITA code GRZZ0002ZB-A) with 2.0 mm diameter and 26.0 mm body length. Its lead spacing and dimensions match industry-standard DO-35 land patterns, enabling direct placement on existing through-hole PCBs without layout modification.
What is the maximum reverse leakage current for HZ22-1-E?
The maximum reverse leakage current for HZ22-1-E is less than 1 µA when measured at VR = 17.5 V and Ta = 25°C. This low leakage supports energy-efficient operation in battery-powered or always-on monitoring circuits where standby current must be minimized.
Does HZ22-1-E have a specified temperature coefficient?
Yes, the HZ22-1-E exhibits a zener voltage temperature coefficient of −0.04 %/°C, as shown in Figure 2 of the Renesas datasheet REJ03G0180-0600. This value applies across its rated operating temperature range and reflects predictable negative drift with rising temperature.
Can HZ22-1-E be used in parallel for higher power dissipation?
No, HZ22-1-E should not be operated in parallel without individual current-limiting resistors due to manufacturing variations in zener voltage. Even small mismatches (e.g., 0.1 V) cause unequal current sharing, risking thermal runaway in one device. For >500 mW requirements, select a single higher-power Zener or switch to active regulation.
HZ22-1-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):
- 22 V
- Tolerance:
- ±2.27%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 14 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 17 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-35
HZ22-1-E FAQ
1.How can I place an order for HZ22-1-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZ22-1-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 HZ22-1-E reliable?
The price and inventory of HZ22-1-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZ22-1-E is usually 5 days.
3.What payment methods are accepted for HZ22-1-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZ22-1-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZ22-1-E?
HZ22-1-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZ22-1-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 HZ22-1-E?
For technical support, including HZ22-1-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZ22-1-E requirements.
6.How does Aetrix verify that HZ22-1-E is sourced from the original manufacturer or authorized distributors?
All HZ22-1-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 HZ22-1-E meets industry standards.
7.What is the process for return or replacement of HZ22-1-E?
All HZ22-1-E units undergo pre-shipment inspection (PSI). If there is an issue with HZ22-1-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 HZ22-1-E part is unused and in its original packaging.
Return procedure for HZ22-1-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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