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Renesas HZ22BP-E
- Part No.:
- HZ22BP-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
HZ22BP-E.pdf
- Description:
- DIODE ZENER 22V 1W DO41
- Quantity:
- Payment:
- Shipping:
Inventory:7,300
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Product details
Overview
HZ22BP-E from Renesas Technology is a silicon epitaxial planar Zener diode designed for precision voltage regulation and overvoltage clamping in DC power rails and reference circuits. It delivers a nominal zener voltage of 22.0 V (min 20.8 V, max 23.3 V) at 10 mA test current, with dynamic resistance of 17.0 Ω, 1.0 W power dissipation, and DO-41 glass package construction.
For engineers reviewing the HZ22BP-E datasheet, HZ22BP-E pinout, HZ22BP-E application, or HZ22BP-E equivalent, key selection criteria include its ±5% zener tolerance (BP grade), low temperature coefficient near zero crossing (~0 mV/°C at ~22 V), surge capability up to 1.0 W nonrepetitive, and suitability for industrial power supply feedback loops, analog sensor reference stabilization, and ESD-protected I/O clamp networks.
Technical Context
The HZ22BP-E operates as a two-terminal, reverse-biased voltage reference device relying on controlled avalanche breakdown. Its BP-grade specification ensures tighter zener voltage tolerance (±5%) compared to CP-grade parts, and its DO-41 glass package provides hermetic sealing and thermal stability up to 175°C junction temperature.
Electrical behavior is characterized under DC test conditions: zener voltage measured at 10 mA, reverse current limited to ≤10 µA at 17.0 V, and dynamic resistance specified at 10 mA. Thermal performance follows standard JEDEC DO-41 derating curves, with full 1.0 W dissipation only at Ta ≤ 50°C without heatsink.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 20.8–23.3 V at IZ = 10 mA - defines stable regulation range for feedback or clamp operation |
| Power Dissipation (Pd) | 1.0 W at Ta ≤ 50°C - sets maximum continuous DC power handling without heatsink |
| Dynamic Resistance (rd) | 17.0 Ω at IZ = 10 mA - determines output impedance and load regulation sensitivity |
| Reverse Current (IR) | ≤10 µA at VR = 17.0 V - confirms low leakage below knee voltage for standby integrity |
| Junction Temperature (Tj) | −55 to +175°C - enables use in extended-temperature industrial and automotive under-hood environments |
| Package | DO-41 glass - provides hermeticity, mechanical robustness, and standardized through-hole mounting |
Pinout & Package
DO-41 glass axial-leaded package with cathode band marking. Standard two-terminal configuration: Pin 1 = Cathode (banded end), Pin 2 = Anode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | High-impedance reference node | Connected to regulated rail or feedback point; reverse bias establishes stable VZ |
| Anode | Reference ground return | Tied to system ground or lower-potential node; completes current path during conduction |
Key Features
| Feature | Design Value |
|---|---|
| BP-grade zener tolerance | ±5% (20.8–23.3 V) - enables tighter regulation than CP-grade alternatives in critical references |
| Low temperature coefficient | ≈0 mV/°C near 22 V - minimizes drift across operating temperature range |
| Nonrepetitive surge rating | 1.0 W for t ≤ 1 s - supports transient overvoltage suppression without failure |
| Hermetic DO-41 glass package | 0.38 g mass, JEDEC-compliant - ensures long-term reliability in humid or corrosive environments |
Applications
| Industrial Power Supply Feedback | Automotive Sensor Reference |
|---|---|
Use Scenario: Stabilizing output voltage in isolated flyback or forward converter feedback loops using optocoupler-coupled TL431 alternatives. IC Role / Device Role / Timing Role: Two-terminal shunt reference providing precise 22 V threshold for error amplifier biasing and loop compensation. Use Value: Enables accurate ±1% output regulation without active ICs, reducing BOM cost and improving fault tolerance in 24 V systems. | Use Scenario: Providing stable bias voltage for analog pressure or temperature transducers in engine control units. IC Role / Device Role / Timing Role: Passive voltage reference for ratiometric ADC excitation and signal conditioning circuitry. Use Value: Maintains sensor accuracy across −40°C to +125°C ambient due to near-zero TC and 175°C Tj rating. |
| ESD-Protected I/O Clamping | Overvoltage Protection Circuit |
Use Scenario: Secondary-level clamping on RS-485 or CAN bus transceiver I/O lines exposed to ISO 7637-2 pulse 5a surges. IC Role / Device Role / Timing Role: Fast-reacting shunt limiter diverting transient energy before IC input damage occurs. Use Value: Absorbs 1.0 W nonrepetitive surge (t ≤ 1 s) while holding line voltage ≤23.3 V, complementing TVS primary protection. | Use Scenario: Preventing damage to downstream regulators or microcontrollers during 24 V battery dump events in industrial PLC backplanes. IC Role / Device Role / Timing Role: Standby-mode voltage clamp activated when input exceeds 22 V threshold. Use Value: Limits peak rail voltage to safe levels with <10 µA leakage at 17 V, ensuring no quiescent power penalty during normal operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4742A | 12 V nominal, ±5%, DO-41, Pd = 1.0 W, rd = 9.0 Ω - lower voltage, lower rd | Not suitable for 22 V regulation; requires redesign of feedback divider or clamp threshold | Select only if system target voltage is 12 V and tighter regulation at that level is needed. |
| BZX55C22 | 22 V nominal, ±5%, DO-35, Pd = 0.5 W, rd = 50 Ω - same VZ, lower power, higher rd, smaller package | Limited to ≤0.5 W continuous dissipation; unsuitable for high-current clamp or sustained regulation loads | Acceptable for low-power reference or signal-level clamping where thermal margin is sufficient. |
Compared with 1N4742A and BZX55C22, the HZ22BP-E offers unique combination of 22 V BP-grade tolerance, 1.0 W dissipation in DO-41, and 17 Ω dynamic resistance-making it optimal for industrial 24 V rail stabilization where thermal headroom and regulation precision are both critical.
Availability
HZ22BP-E is available at Aetrix Electronics and suitable for industrial power supplies, automotive sensor interfaces, and overvoltage protection circuits requiring stable component supply with long lifecycle assurance.
Supply support for HZ22BP-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 Technology Corp. (now part of Renesas Electronics Corporation) is a Japanese semiconductor manufacturer specializing in microcontrollers, analog, and power devices for industrial, automotive, and infrastructure markets.
The HZ-P Series was developed specifically for high-reliability voltage reference and clamping applications in harsh-environment power systems, emphasizing tight tolerance, thermal stability, and surge resilience in legacy through-hole packaging.
FAQ
What is the zener voltage tolerance for HZ22BP-E?
The HZ22BP-E has a BP-grade zener voltage tolerance of ±5%, corresponding to a guaranteed range of 20.8 V to 23.3 V at 10 mA test current. This tighter tolerance than CP-grade variants (±10%) makes HZ22BP-E suitable for applications demanding precise voltage referencing without post-calibration trimming.
Can HZ22BP-E be used in place of HZ22CP-E?
Yes, HZ22BP-E can replace HZ22CP-E electrically, but with improved voltage accuracy: HZ22CP-E specifies 22.0–24.5 V (±10%), while HZ22BP-E narrows this to 20.8–23.3 V (±5%). No PCB changes are required since both share identical DO-41 package and pinout, though thermal design should verify 1.0 W dissipation margin remains valid.
What is the maximum reverse current for HZ22BP-E at 17.0 V?
Per the datasheet, the maximum reverse current (IR) for HZ22BP-E is 10 µA when reverse voltage (VR) is held at 17.0 V. This low leakage ensures minimal standby power draw and prevents unintended conduction in clamp or reference configurations operating below the zener knee.
Does HZ22BP-E have a specified temperature coefficient?
Yes - Figure 2 in the HZ-P Series datasheet shows the zener voltage temperature coefficient (γZ) crosses zero near 22 V, with typical values between −0.02 and +0.02 mV/°C across the 20–24 V range. This near-zero TC minimizes drift over temperature, supporting stable reference performance in unregulated thermal environments.
Is HZ22BP-E RoHS compliant?
The original HZ-P Series documentation (Rev. 6.00, 2004) predates RoHS enforcement and does not declare compliance. For modern designs, confirm current manufacturing status with Renesas Electronics or authorized distributors, as legacy DO-41 Zeners may require special ordering codes or alternative qualified parts for RoHS-constrained applications.
HZ22BP-E Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- HZ-P
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 22 V
- Tolerance:
- ±5.68%
- Power - Max:
- 1 W
- 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-41
HZ22BP-E FAQ
1.How can I place an order for HZ22BP-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZ22BP-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 HZ22BP-E reliable?
The price and inventory of HZ22BP-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZ22BP-E is usually 5 days.
3.What payment methods are accepted for HZ22BP-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZ22BP-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZ22BP-E?
HZ22BP-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZ22BP-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 HZ22BP-E?
For technical support, including HZ22BP-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZ22BP-E requirements.
6.How does Aetrix verify that HZ22BP-E is sourced from the original manufacturer or authorized distributors?
All HZ22BP-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 HZ22BP-E meets industry standards.
7.What is the process for return or replacement of HZ22BP-E?
All HZ22BP-E units undergo pre-shipment inspection (PSI). If there is an issue with HZ22BP-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 HZ22BP-E part is unused and in its original packaging.
Return procedure for HZ22BP-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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