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Renesas HZS24NB1TD-E
- Part No.:
- HZS24NB1TD-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZS24NB1TD-E.pdf
- Description:
- DIODE ZENER 0.4W
- Quantity:
- Payment:
- Shipping:
Inventory:42,098
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Product details
Overview
HZS24NB1TD-E from Renesas Electronics is a silicon planar Zener diode designed for precision voltage regulation in stabilized power supplies. It delivers a nominal zener voltage of 24.26–25.52 V at 5 mA test current, with dynamic resistance of 19 Ω and maximum power dissipation of 400 mW. Its low leakage and tight voltage tolerance make it suitable for reference and biasing circuits in industrial instrumentation and embedded power rails.
For engineers reviewing the HZS24NB1TD-E datasheet, HZS24NB1TD-E pinout, HZS24NB1TD-E application, or HZS24NB1TD-E equivalent, key selection criteria include zener voltage accuracy (±2.6% at 25°C), temperature coefficient (≈+0.055 %/°C), junction temperature rating (200°C), and compatibility with 5 mm-pitch automated insertion processes.
Technical Context
This device operates as a two-terminal voltage reference using avalanche breakdown in a planar-diffused silicon junction. Its zener voltage is specified at IZ = 5 mA with pulse testing (PW = 40 ms) to minimize self-heating effects. The B1 grade denotes tighter initial voltage tolerance versus B2/B3/B4 variants within the HZS24N family.
Thermal performance is defined by a 200°C maximum junction temperature and –55°C to +175°C storage range. Power derating follows a linear curve above 25°C ambient, dropping to ~250 mW at 70°C on a standard 100 × 180 × 1.6 mm phenolic PCB - consistent with its MHD package thermal mass and leadframe construction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 24.26–25.52 V at IZ = 5 mA - defines stable regulation point for feedback or reference use |
| Dynamic Resistance (rd) | 19 Ω max at IZ = 5 mA - determines output impedance and load regulation sensitivity |
| Power Dissipation (Pd) | 400 mW max at Ta = 25°C - sets absolute DC/average power limit before thermal shutdown risk |
| Reverse Current (IR) | 0.2 μA max at VR = 19 V - ensures minimal standby leakage in high-impedance bias networks |
| Junction Temperature (Tj) | 200°C max - enables operation in high-ambient industrial environments with appropriate PCB copper area |
| Temperature Coefficient (γZ) | +0.055 %/°C typical near 24 V - quantifies drift magnitude per degree Celsius in precision references |
Pinout & Package
The HZS24NB1TD-E is housed in the MHD package (JEITA code GRZZ0002ZC-A), a radial-leaded, epoxy-molded, 2.0 mm diameter cylindrical case with 26.0 mm lead length and 5 mm pitch - optimized for high-speed automatic insertion and wave soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener cathode terminal | Connected to regulated positive rail; polarity must be observed to enable reverse-bias conduction |
| 2 (Anode) | Zener anode terminal | Connected to circuit ground or lower potential node; completes bias path for breakdown operation |
Key Features
| Feature | Design Value |
|---|---|
| Low dynamic impedance | 19 Ω max ensures stable regulation under varying load currents in feedback loops |
| Tight zener voltage tolerance (B1 grade) | ±2.6% initial accuracy reduces need for post-calibration trimming in voltage references |
| High junction temperature rating | 200°C maximum allows reliable operation in enclosed industrial enclosures without forced cooling |
| 5 mm pitch lead spacing | Enables direct compatibility with standard high-speed pick-and-place and auto-insertion equipment |
Applications
| Industrial Power Supply Reference | Microcontroller Voltage Monitor |
|---|---|
Use Scenario: Providing a stable 24 V reference for error amplifiers in isolated DC-DC converters. IC Role / Device Role / Timing Role: Zener diode functions as primary voltage reference in secondary-side feedback loop. Use Value: Tight 24.26–25.52 V tolerance and 19 Ω dynamic resistance maintain ±1% output regulation across line/load variations. |
Use Scenario: Monitoring 24 V system rail for brown-out detection in PLC I/O modules. IC Role / Device Role / Timing Role: Serves as threshold element feeding comparator input for supply supervision. Use Value: Sub-microamp reverse leakage preserves battery backup runtime during sleep modes. |
| Automated Test Equipment Bias | LED Driver Current Setpoint |
Use Scenario: Generating precise bias voltages for op-amp input stages in multichannel DAQ front-ends. IC Role / Device Role / Timing Role: Provides fixed reference for programmable gain amplifier offset calibration. Use Value: +0.055 %/°C temperature coefficient limits drift to <±0.15 V over –25°C to +75°C operating range. |
Use Scenario: Setting constant-current level in linear LED driver circuits for signage or panel indicators. IC Role / Device Role / Timing Role: Establishes reference voltage across current-sense resistor to define LED current. Use Value: 400 mW power rating supports continuous operation at 20 mA with 1.2 kΩ sense resistor. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4749A | Zener voltage 24 V ±5%, rd = 25 Ω, Pd = 1 W, DO-41 package | Higher power but looser tolerance and larger footprint; requires layout revision | Choose when higher surge energy handling is needed and board space permits larger package |
| BZX55-C24 | Zener voltage 24 V ±5%, rd = 30 Ω, Pd = 500 mW, DO-35 package | Lower voltage accuracy and higher impedance; not suitable for precision references | Acceptable only for non-critical clamping where cost is prioritized over stability |
Compared with 1N4749A and BZX55-C24, the HZS24NB1TD-E offers superior voltage accuracy (±2.6% vs ±5%), lower dynamic impedance (19 Ω vs ≥25 Ω), and MHD packaging optimized for automated assembly - making it preferred for space-constrained, high-reliability industrial power monitoring.
Availability
HZS24NB1TD-E is available at Aetrix Electronics and suitable for industrial power supply reference, microcontroller voltage monitor, automated test equipment bias, and LED driver current setpoint applications requiring stable component supply and long-term sourcing continuity.
Supply support for HZS24NB1TD-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 global semiconductor leader specializing in microcontrollers, analog, power, and connectivity solutions for industrial, automotive, and infrastructure markets.
The HZS-N Series belongs to Renesas' discrete voltage reference product line, engineered specifically for high-stability, low-drift zener regulation in industrial-grade power systems and instrumentation.
FAQ
What is the exact zener voltage range for HZS24NB1TD-E at 25°C?
The HZS24NB1TD-E has a guaranteed zener voltage range of 24.26 V to 25.52 V when tested at IZ = 5 mA and Ta = 25°C. This corresponds to the B1 grade specification within the HZS24N family and reflects ±2.6% tolerance around the nominal 24.9 V center point. The value is verified per Renesas document REJ03G0185-0300 Rev.3.00.
Does HZS24NB1TD-E support surface-mount assembly?
No, the HZS24NB1TD-E uses the through-hole MHD package (JEITA GRZZ0002ZC-A) with radial leads and 5 mm pitch - designed exclusively for axial or radial automatic insertion and wave soldering. It is not compatible with reflow or pick-and-place SMT processes. For SMT alternatives, consult Renesas' HZS-N series SMD variants such as HZS24NB1F.
What is the maximum allowable reverse current for HZS24NB1TD-E before breakdown?
The HZS24NB1TD-E specifies a maximum reverse current (IR) of 0.2 μA at VR = 19 V and Ta = 25°C. This ultra-low leakage ensures minimal power loss in high-impedance reference networks and supports accurate voltage monitoring in battery-backed systems. Values are measured per the conditions in Renesas' REJ03G0185-0300 datasheet.
Can HZS24NB1TD-E be used in automotive applications?
The HZS24NB1TD-E is rated as "Standard" quality grade per Renesas' classification and is intended for industrial, office, and communications equipment - not automotive-grade systems. It lacks AEC-Q200 qualification and is not recommended for under-hood or safety-critical vehicle subsystems. For automotive use, Renesas offers qualified alternatives like the RVZ24 series.
How does the temperature coefficient affect HZS24NB1TD-E in real-world operation?
The HZS24NB1TD-E exhibits a typical zener voltage temperature coefficient of +0.055 %/°C near 24 V, meaning its regulated voltage increases by approximately 13.2 mV per °C rise. Over a –25°C to +75°C ambient range, this results in ≤1.32 V total drift - a critical factor when used in precision references. Designers must account for this in thermal-aware layout and calibration routines.
HZS24NB1TD-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:
- -
HZS24NB1TD-E FAQ
1.How can I place an order for HZS24NB1TD-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZS24NB1TD-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 HZS24NB1TD-E reliable?
The price and inventory of HZS24NB1TD-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZS24NB1TD-E is usually 5 days.
3.What payment methods are accepted for HZS24NB1TD-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZS24NB1TD-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZS24NB1TD-E?
HZS24NB1TD-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZS24NB1TD-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 HZS24NB1TD-E?
For technical support, including HZS24NB1TD-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZS24NB1TD-E requirements.
6.How does Aetrix verify that HZS24NB1TD-E is sourced from the original manufacturer or authorized distributors?
All HZS24NB1TD-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 HZS24NB1TD-E meets industry standards.
7.What is the process for return or replacement of HZS24NB1TD-E?
All HZS24NB1TD-E units undergo pre-shipment inspection (PSI). If there is an issue with HZS24NB1TD-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 HZS24NB1TD-E part is unused and in its original packaging.
Return procedure for HZS24NB1TD-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HZS24NB1TD-E Tags
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MM5Z5V1ST1G
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