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Renesas HZ24BP-E
- Part No.:
- HZ24BP-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZ24BP-E.pdf
- Description:
- DIODE ZENER
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
HZ24BP-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 24.0 V (min 22.8 V, max 25.6 V) at 10 mA test current, with dynamic resistance of 19.0 Ω, 1.0 W power dissipation, and DO-41 glass package for high reliability in industrial power supplies.
For engineers reviewing the HZ24BP-E datasheet, HZ24BP-E pinout, HZ24BP-E application, or HZ24BP-E equivalent, key selection criteria include its 24 V zener tolerance (±5.3% at BP grade), low temperature coefficient (~+0.04 %/°C), surge capability up to 10 W for 1 s, junction temperature rating of 175°C, and compatibility with standard through-hole PCB assembly processes.
Technical Context
The HZ24BP-E operates as a two-terminal shunt regulator, maintaining stable output voltage by conducting reverse current when applied voltage exceeds its zener breakdown threshold. Its epitaxial planar structure ensures tight VZ distribution and low leakage (<10 µA at VR = 19.0 V).
Designed for DC-biased applications, it exhibits negligible capacitive coupling and no switching latency-making it suitable for static voltage references, analog sensor biasing, and overvoltage protection where fast transient response is not required but long-term stability and thermal robustness are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 22.8 V min to 25.6 V max at IZ = 10 mA - defines clamping threshold range for 24 V rail protection |
| Power Dissipation (Pd) | 1.0 W at Ta = 25°C - sets maximum continuous power handling without heatsink |
| Dynamic Resistance (rd) | 19.0 Ω at IZ = 10 mA - determines regulation stiffness and load-induced voltage drift |
| Reverse Current (IR) | ≤10 µA at VR = 19.0 V - ensures minimal standby leakage in battery-backed circuits |
| Junction Temperature (Tj) | 175°C maximum - enables operation in high-ambient industrial environments |
| Temperature Coefficient (γZ) | +0.04 %/°C - provides predictable, low-drift behavior across −55°C to +125°C operating range |
Pinout & Package
Package: DO-41 glass-encapsulated axial lead package per JEDEC and JEITA standards; mass ≈ 0.38 g; dimensions: 5.2 mm diameter × 26.0 mm length.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to higher-potential node; reverse-biased terminal where zener breakdown occurs |
| 2 (Non-banded End) | Anode | Connected to lower-potential node (typically ground or return path); completes shunt conduction path |
Key Features
| Feature | Design Value |
|---|---|
| Wide VZ spectrum (1.88–40 V) | Enables single-family sourcing across diverse supply rails without redesigning protection topology |
| DO-41 glass package | Provides hermetic sealing, high insulation resistance (>1000 MΩ), and proven field reliability in humid or contaminated environments |
| Low dynamic resistance (19.0 Ω) | Minimizes output voltage variation under changing load currents in reference divider networks |
| High surge rating (10 W, 1 s) | Withstands transient overvoltages such as ESD or inductive kickback without degradation |
Applications
| Industrial Power Supply Protection | Automotive Body Control Module Reference |
|---|---|
Use Scenario: Clamping 24 V CAN bus power rail against load dump transients in factory automation PLCs. IC Role / Device Role / Timing Role: Shunt voltage limiter placed across input capacitor to clamp surges above 27.6 V. Use Value: Prevents downstream DC-DC converter damage using HZ24BP-E's 10 W nonrepetitive surge rating and 175°C junction limit. |
Use Scenario: Providing stable 24 V reference for microcontroller ADC calibration in vehicle lighting control units. IC Role / Device Role / Timing Role: Precision voltage reference in resistive divider feeding ADC VREF pin. Use Value: Achieves <±0.5% reference accuracy over −40°C to +105°C due to +0.04 %/°C tempco and low rd. |
| Telecom Line Card Overvoltage Guard | Medical Equipment Power Sequencing |
Use Scenario: Protecting Ethernet PHY interface power pins from induced surges on outdoor telecom cabinets. IC Role / Device Role / Timing Role: Standby clamping device connected between 24 V bias rail and chassis ground. Use Value: Maintains <10 µA leakage at 19 V to avoid false triggering while enabling rapid clamping at 22.8 V+. |
Use Scenario: Enabling safe power-up sequencing of isolated 24 V auxiliary supplies in diagnostic imaging systems. IC Role / Device Role / Timing Role: Voltage supervisor element that triggers enable signal when main 24 V rail reaches regulation. Use Value: Leverages tight VZ tolerance (±5.3%) and repeatable breakdown to ensure deterministic turn-on timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4749A | Zener voltage 24 V ±5%, Pd = 1.0 W, DO-41, rd = 20 Ω - nearly identical electrical specs | No BP/CP grade distinction; wider VZ spread (22.8–25.2 V) vs. HZ24BP-E's tighter 22.8–25.6 V | Preferred for cost-sensitive designs where Renesas-grade traceability is not required |
| BZX55C24 | Zener voltage 24 V ±5%, Pd = 0.5 W, DO-35, rd = 35 Ω - lower power rating and higher impedance | Smaller DO-35 package limits thermal performance; unsuitable for sustained 10 mA operation | Select only for space-constrained low-power biasing where 0.5 W derating is acceptable |
Compared with 1N4749A and BZX55C24, the HZ24BP-E offers superior thermal margin (1.0 W at 25°C with DO-41), lower dynamic resistance for tighter regulation, and Renesas' documented industrial-grade reliability - making it optimal for mission-critical 24 V clamping where long-term stability and surge resilience are prioritized.
Availability
HZ24BP-E is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, telecom line cards, and medical equipment requiring stable component supply with full traceability and extended lifecycle support.
Supply support for HZ24BP-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 DC voltage regulation and overvoltage limiting in harsh-environment applications-emphasizing tight VZ tolerance, low tempco, and robust surge immunity in glass-packaged Zener diodes.
FAQ
What is the exact zener voltage range for HZ24BP-E at 10 mA?
The HZ24BP-E has a guaranteed zener voltage range of 22.8 V minimum to 25.6 V maximum when tested at IZ = 10 mA and Ta = 25°C. This ±5.3% tolerance reflects the BP grade specification and is confirmed in the Electrical Characteristics table on page 4 of Rev.6.00 datasheet. The HZ24BP-E is not rated for operation outside this validated range under specified test conditions.
Can HZ24BP-E be used in surface-mount designs?
No - the HZ24BP-E uses a DO-41 axial-leaded glass package intended exclusively for through-hole mounting. It lacks SMD-compatible terminations or land patterns. For surface-mount equivalents, consider Renesas' HZ24BP series in SOD-123 or similar packages - but note those are distinct orderable parts, not drop-in replacements for HZ24BP-E.
What is the maximum allowable reverse voltage before conduction begins?
The HZ24BP-E exhibits ≤10 µA reverse leakage current at VR = 19.0 V, per datasheet page 4. Conduction remains negligible below this threshold; measurable zener breakdown begins near 22.8 V. Therefore, 19.0 V serves as the practical upper limit for non-conducting operation - critical for designing fail-safe clamping margins.
How does ambient temperature affect HZ24BP-E's power dissipation capability?
Per Figure 3 (page 5), HZ24BP-E's power dissipation derates linearly: from 1.0 W at 25°C to zero at ~150°C ambient with no heatsink. At 70°C ambient, usable Pd drops to approximately 0.75 W. Designers must apply this curve during thermal analysis - the HZ24BP-E's 175°C junction rating does not override package-level thermal limits.
Is HZ24BP-E suitable for AC voltage regulation?
No - the HZ24BP-E is characterized and specified only for DC operation, as explicitly noted in "Note 1. Tested with DC" on pages 2–4 of the datasheet. Its parameters (VZ, rd, IR) are not validated under AC or pulsed conditions. For AC applications, use bidirectional TVS diodes or dedicated AC zener configurations - not the HZ24BP-E.
HZ24BP-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:
- -
HZ24BP-E FAQ
1.How can I place an order for HZ24BP-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZ24BP-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 HZ24BP-E reliable?
The price and inventory of HZ24BP-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZ24BP-E is usually 5 days.
3.What payment methods are accepted for HZ24BP-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZ24BP-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZ24BP-E?
HZ24BP-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZ24BP-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 HZ24BP-E?
For technical support, including HZ24BP-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZ24BP-E requirements.
6.How does Aetrix verify that HZ24BP-E is sourced from the original manufacturer or authorized distributors?
All HZ24BP-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 HZ24BP-E meets industry standards.
7.What is the process for return or replacement of HZ24BP-E?
All HZ24BP-E units undergo pre-shipment inspection (PSI). If there is an issue with HZ24BP-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 HZ24BP-E part is unused and in its original packaging.
Return procedure for HZ24BP-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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