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Renesas HZS24NB4TD-E
- Part No.:
- HZS24NB4TD-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZS24NB4TD-E.pdf
- Description:
- DIODE ZENER 0.4W
- Quantity:
- Payment:
- Shipping:
Inventory:12,500
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Product details
Overview
HZS24NB4TD-E from Renesas Electronics is a silicon planar Zener diode designed for precision voltage regulation in stabilized power supplies, with a nominal zener voltage of 24.81 V (max), dynamic resistance of 19 Ω at 5 mA, and maximum power dissipation of 400 mW. It operates within a junction temperature range of –55°C to +200°C and features low leakage current (≤0.2 μA at VR = 20 V), making it suitable for industrial-grade reference and clamp applications.
For engineers reviewing the HZS24NB4TD-E datasheet, HZS24NB4TD-E pinout, HZS24NB4TD-E application, or HZS24NB4TD-E equivalent, this device serves as a high-stability, low-impedance voltage reference in DC-DC feedback loops, overvoltage protection circuits, and analog sensor biasing where tight tolerance and thermal stability are required.
Technical Context
The HZS24NB4TD-E employs a planar diffusion process to achieve stable zener breakdown characteristics with minimal temperature drift. Its zener voltage temperature coefficient is approximately +0.045 %/°C (or +11 mV/°C) near 24 V, confirmed by Figure 2 in the datasheet, enabling predictable behavior across ambient temperatures up to +175°C storage limit.
It is rated for 5 mA test current (IZ), exhibits reverse current ≤0.2 μA at 20 V (VR), and maintains dynamic resistance ≤19 Ω under specified conditions - parameters critical for low-noise regulation and fast transient response in feedback networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 23.81 V (min) to 24.81 V (max) at IZ = 5 mA - defines precise regulation window for 24 V rail stabilization |
| Dynamic Resistance (rd) | ≤19 Ω at IZ = 5 mA - ensures minimal output impedance and high ripple rejection in reference paths |
| Reverse Current (IR) | ≤0.2 μA at VR = 20 V - guarantees low standby power loss and high off-state blocking integrity |
| Power Dissipation (Pd) | 400 mW - supports continuous operation in compact PCB layouts with standard thermal relief |
| Junction Temperature (Tj) | –55°C to +200°C - enables use in extended-temperature industrial and automotive under-hood environments |
| Package | MHD (JEITA GRZZ0002ZC-A) - 5 mm pitch, axial-leaded, 2.0 mm diameter body for high-speed automatic insertion |
Pinout & Package
Package: MHD (axial-leaded, glass-passivated silicon planar diode, 2.0 mm diameter × 26 mm length, cathode band marked).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener breakdown terminal | Connected to regulated output node; reverse-biased during normal operation to maintain fixed voltage drop |
| 2 (Anode) | Reference ground terminal | Tied to circuit common or feedback divider low-side; establishes return path for zener current |
Key Features
| Feature | Design Value |
|---|---|
| Low zener impedance | 19 Ω max at 5 mA - improves load regulation and reduces sensitivity to current variations in feedback networks |
| Wide zener voltage range coverage | Part of HZS-N series spanning 1.88–38.52 V - allows standardized design reuse across multiple supply rails |
| High-temperature capability | Junction rating up to +200°C - supports operation in thermally demanding industrial enclosures without derating |
| Automated assembly compatibility | 5 mm pitch, MHD package - optimized for high-throughput pick-and-place and wave soldering in volume production |
Applications
| Industrial Power Supply Regulation | Overvoltage Protection Clamp |
|---|---|
|
Use Scenario: Stabilizing feedback voltage in isolated DC-DC converters for PLC I/O modules. IC Role / Device Role / Timing Role: Zener reference element in TL431-based shunt regulator feedback network. Use Value: Maintains ±1.5% output accuracy over –40°C to +85°C ambient due to low rd and predictable γZ. |
Use Scenario: Clamping surge transients on 24 V sensor bus lines in factory automation systems. IC Role / Device Role / Timing Role: Fast-acting voltage limiter protecting downstream ADC inputs and level-shifters. Use Value: Responds within nanoseconds to >30 V spikes while dissipating <400 mW peak energy without degradation. |
| Analog Sensor Biasing | Programmable Reference Generator |
|
Use Scenario: Providing stable excitation voltage for 4–20 mA current-loop pressure transducers. IC Role / Device Role / Timing Role: Precision voltage source for bridge sensor excitation and ratiometric ADC reference. Use Value: Delivers <0.5% long-term drift over 10 years due to planar construction and low IR leakage. |
Use Scenario: Setting threshold voltages in multi-range programmable power supply front-ends. IC Role / Device Role / Timing Role: Adjustable reference node in DAC-controlled comparator ladder networks. Use Value: Enables 0.1% step resolution across 24 V range using matched HZS-N series variants in parallel configurations. |
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 |
|---|---|---|---|
| BZX84-C24 (Diodes Inc.) | 24 V nominal, SOT-23 package, 300 mW Pd, rd ≈ 35 Ω - higher impedance, surface-mount only | Requires PCB redesign for SMT layout; unsuitable for through-hole or high-temp via-hole mounting | Select when board space is constrained and reflow compatibility is mandatory |
| 1N4749A (ON Semiconductor) | 24 V nominal, DO-41 package, 1 W Pd, rd ≈ 25 Ω - higher power but larger footprint and looser VZ tolerance (±5%) | Better for high-energy clamping; less precise for feedback references due to wider VZ spread | Select when surge energy absorption >400 mW is required and ±5% regulation is acceptable |
Compared with BZX84-C24 and 1N4749A, the HZS24NB4TD-E offers tighter VZ tolerance (±2.1%), lower rd (19 Ω), and superior thermal stability - making it optimal for precision feedback and high-reliability industrial designs where axial-leaded mounting and long-term drift control are prioritized.
Availability
HZS24NB4TD-E is available at Aetrix Electronics and suitable for industrial power supply regulation, overvoltage protection clamping, and analog sensor biasing requiring stable component supply, consistent parametric performance, and long-lifecycle availability.
Supply support for HZS24NB4TD-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 Corporation is a Japanese semiconductor manufacturer specializing in microcontrollers, analog and power devices, and system-on-chip solutions for industrial, automotive, and infrastructure markets.
The HZS-N series was developed specifically for high-stability, low-drift voltage reference and clamping in industrial power conversion and sensing systems - emphasizing reliability, thermal robustness, and automated manufacturing compatibility.
FAQ
What is the exact zener voltage range for HZS24NB4TD-E?
The HZS24NB4TD-E has a guaranteed zener voltage range of 23.81 V (minimum) to 24.81 V (maximum) when tested at IZ = 5 mA and Ta = 25°C. This 1.00 V span reflects Grade B4 tolerance within the HZS-N series and is validated per the REJ03G0185-0300 datasheet, page 4.
Does HZS24NB4TD-E support high-temperature operation?
Yes, HZS24NB4TD-E is rated for junction temperatures from –55°C to +200°C and storage temperatures up to +175°C. Its planar silicon construction and glass passivation ensure stable zener characteristics across this full range, making it suitable for under-hood or enclosed industrial environments.
What is the dynamic resistance specification for HZS24NB4TD-E?
The dynamic resistance (rd) of HZS24NB4TD-E is specified as ≤19 Ω at IZ = 5 mA and Ta = 25°C. This low impedance directly contributes to high ripple rejection and tight regulation in feedback circuits, as confirmed in the Electrical Characteristics table on page 3 of the datasheet.
Is HZS24NB4TD-E compatible with automated PCB assembly processes?
Yes, HZS24NB4TD-E uses the MHD package (JEITA GRZZ0002ZC-A) with 5 mm lead pitch and axial leads - explicitly designed for high-speed automatic insertion equipment. Its mechanical dimensions and cathode band marking support reliable orientation and placement in volume manufacturing.
How does the temperature coefficient of HZS24NB4TD-E affect its performance?
HZS24NB4TD-E exhibits a positive zener voltage temperature coefficient of approximately +0.045 %/°C (≈+11 mV/°C) near 24 V, as shown in Figure 2 of the datasheet. This predictable drift enables accurate compensation in temperature-critical reference designs without requiring external correction circuitry.
HZS24NB4TD-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:
- -
HZS24NB4TD-E FAQ
1.How can I place an order for HZS24NB4TD-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZS24NB4TD-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 HZS24NB4TD-E reliable?
The price and inventory of HZS24NB4TD-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZS24NB4TD-E is usually 5 days.
3.What payment methods are accepted for HZS24NB4TD-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZS24NB4TD-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZS24NB4TD-E?
HZS24NB4TD-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZS24NB4TD-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 HZS24NB4TD-E?
For technical support, including HZS24NB4TD-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZS24NB4TD-E requirements.
6.How does Aetrix verify that HZS24NB4TD-E is sourced from the original manufacturer or authorized distributors?
All HZS24NB4TD-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 HZS24NB4TD-E meets industry standards.
7.What is the process for return or replacement of HZS24NB4TD-E?
All HZS24NB4TD-E units undergo pre-shipment inspection (PSI). If there is an issue with HZS24NB4TD-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 HZS24NB4TD-E part is unused and in its original packaging.
Return procedure for HZS24NB4TD-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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