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Renesas HZS24NB2TA-E
- Part No.:
- HZS24NB2TA-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZS24NB2TA-E.pdf
- Description:
- DIODE ZENER 0.4W
- Quantity:
- Payment:
- Shipping:
Inventory:24,000
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Product details
Overview
HZS24NB2TA-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 24.81 V (max) 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 HZS24NB2TA-E datasheet, HZS24NB2TA-E pinout, HZS24NB2TA-E application, or HZS24NB2TA-E equivalent, key selection criteria include zener voltage accuracy (±2.5% at 24.81 V), thermal coefficient behavior (≈+0.065 %/°C near 24 V), junction temperature rating (200°C), and compatibility with 5 mm-pitch automated insertion processes.
Technical Context
This device operates as a two-terminal shunt regulator, maintaining stable output voltage across varying load currents by conducting reverse-biased current above its specified zener breakdown threshold. Its planar construction ensures consistent parameter distribution and high reliability under continuous DC stress.
The HZS24NB2TA-E exhibits a positive zener voltage temperature coefficient (~+0.065 %/°C) typical of mid-voltage Zeners (20–30 V range), enabling predictable drift compensation in temperature-sensitive references. It is rated for operation from –55°C to +175°C storage and up to 200°C junction temperature, supporting use in thermally demanding environments.
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 regulation window for precision reference design |
| 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 thermal derating limit for PCB layout and heatsinking |
| Reverse Current (IR) | 0.2 μA max at VR = 19 V - ensures minimal quiescent current in standby/bias networks |
| Junction Temperature (Tj) | 200°C max - enables operation in high-ambient industrial or automotive under-hood applications |
| Zener Voltage Tempco (γZ) | +0.065 %/°C (typical at ~24 V) - allows accurate thermal drift modeling in voltage references |
Pinout & Package
Package: MHD (JEITA code GRZZ0002ZC-A), axial-leaded, 2.0 mm diameter × 26.0 mm length, 5 mm pitch compatible, mass ≈ 0.084 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener terminal with black band marking | Connected to higher potential node; reverse-bias voltage applied here to initiate regulation |
| 2 (Anode) | Reference ground/reference return | Common return path for zener current; establishes regulated voltage relative to this node |
Key Features
| Feature | Design Value |
|---|---|
| Low dynamic impedance | 19 Ω max ensures <1% output variation over ±10 mA load step changes |
| Tight zener voltage tolerance | Grade B2: ±2.5% (23.81–24.81 V) enables single-supply reference without trimming |
| High-temperature capability | 200°C junction rating supports use in sealed enclosures or near heat sources |
| Automated insertion compatibility | 5 mm pitch and standardized MHD lead spacing enable direct placement on high-volume SMT-compatible through-hole lines |
| Low leakage current | ≤0.2 μA at 19 V reverse bias minimizes error in high-impedance feedback networks |
Applications
| Industrial Power Monitoring | Embedded Microcontroller Reference |
|---|---|
|
Use Scenario: Voltage supervision circuit in programmable logic controller (PLC) analog input modules monitoring 24 V DC field power rails. IC Role / Device Role / Timing Role: Shunt reference providing stable 24 V threshold for comparator-based overvoltage detection. Use Value: Tight 23.81–24.81 V tolerance eliminates need for external calibration; 19 Ω rd ensures fast response to transient overvoltage events. |
Use Scenario: Precision ADC reference for 12-bit SAR converter in battery-powered sensor node. IC Role / Device Role / Timing Role: Low-drift zener source for internal VREF generation in microcontroller analog subsystem. Use Value: +0.065 %/°C tempco enables <±0.5% total error over –40°C to +85°C ambient without software compensation. |
| DC-DC Converter Feedback | Test Equipment Bias Supply |
|
Use Scenario: Secondary-side voltage sensing in isolated flyback converter regulating 24 V output. IC Role / Device Role / Timing Role: Zener clamp defining optocoupler LED current threshold for feedback loop stability. Use Value: 400 mW power rating accommodates worst-case feedback current ripple; low leakage avoids false triggering during light-load conditions. |
Use Scenario: Stable bias voltage for op-amp offset nulling in bench multimeter front-end amplifier. IC Role / Device Role / Timing Role: Low-noise, low-drift voltage source replacing bulkier IC references in cost-sensitive portable gear. Use Value: 0.2 μA reverse leakage prevents loading of high-Z nulling potentiometer; axial package simplifies manual calibration access. |
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 = 20 Ω, Pd = 1 W, DO-41 package | Higher power but looser tolerance; larger footprint and different thermal profile | Preferred where >400 mW dissipation or legacy DO-41 board compatibility is required |
| BZX55C24 | Zener voltage 24 V ±5%, rd = 30 Ω, Pd = 500 mW, DO-35 package | Higher dynamic resistance reduces regulation accuracy; smaller glass package limits thermal robustness | Suitable for space-constrained designs where 24 V ±5% tolerance is acceptable and peak power <500 mW |
Compared with 1N4749A and BZX55C24, the HZS24NB2TA-E offers tighter voltage tolerance (±2.5% vs. ±5%), lower dynamic resistance (19 Ω vs. ≥20 Ω), and optimized thermal performance in the MHD package-making it preferable for precision industrial references where long-term stability and thermal predictability are critical.
Availability
HZS24NB2TA-E is available at Aetrix Electronics and suitable for industrial automation, embedded power management, and test equipment requiring stable component supply with guaranteed long-term continuity and traceable sourcing.
Supply support for HZS24NB2TA-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 timing solutions for industrial, automotive, and infrastructure markets.
The HZS-N Series is part of Renesas' discrete Zener portfolio, engineered for high-stability voltage reference and regulation in cost-sensitive, high-reliability power supply designs across industrial and communications equipment.
FAQ
What is the exact zener voltage range for HZS24NB2TA-E at 5 mA test current?
The HZS24NB2TA-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 Grade B2 tolerance corresponds to ±2.5% about the nominal 24.3 V center point, as confirmed in the Renesas REJ03G0185-0300 datasheet, page 4.
Is HZS24NB2TA-E suitable for surface-mount assembly?
No - the HZS24NB2TA-E uses the axial-leaded MHD package (JEITA GRZZ0002ZC-A), designed specifically for through-hole mounting and 5 mm-pitch high-speed automatic insertion. It is not a surface-mount device; no SMD variant exists in the HZS-N Series for this voltage grade.
What is the maximum allowable reverse voltage before breakdown for HZS24NB2TA-E?
The HZS24NB2TA-E begins controlled zener conduction at its specified breakdown range (23.81–24.81 V). The absolute maximum non-destructive reverse voltage is not separately defined; operation must remain within the zener region using appropriate series current limiting. Exceeding 24.81 V without current limiting risks thermal runaway due to its 400 mW power limit.
Does HZS24NB2TA-E meet RoHS requirements?
Yes - Renesas Electronics confirms RoHS compliance for the HZS-N Series, including HZS24NB2TA-E, per EU Directive 2011/65/EU. Lead content is restricted to ≤1000 ppm, and all six RoHS substances are controlled, as stated in Renesas environmental documentation and verified via authorized distributor records (e.g., Digi-Key, Mouser).
How does the temperature coefficient of HZS24NB2TA-E affect long-term reference stability?
The HZS24NB2TA-E exhibits a typical positive temperature coefficient of +0.065 %/°C near 24 V, meaning its zener voltage increases ~16 mV/°C. Over a –40°C to +85°C ambient range, this contributes ≤2.0 V drift - a predictable, linear offset that can be compensated in system-level calibration. Its stability is superior to lower-voltage Zeners with negative coefficients in mixed-temperature environments.
HZS24NB2TA-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:
- -
HZS24NB2TA-E FAQ
1.How can I place an order for HZS24NB2TA-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZS24NB2TA-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 HZS24NB2TA-E reliable?
The price and inventory of HZS24NB2TA-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZS24NB2TA-E is usually 5 days.
3.What payment methods are accepted for HZS24NB2TA-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZS24NB2TA-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZS24NB2TA-E?
HZS24NB2TA-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZS24NB2TA-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 HZS24NB2TA-E?
For technical support, including HZS24NB2TA-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZS24NB2TA-E requirements.
6.How does Aetrix verify that HZS24NB2TA-E is sourced from the original manufacturer or authorized distributors?
All HZS24NB2TA-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 HZS24NB2TA-E meets industry standards.
7.What is the process for return or replacement of HZS24NB2TA-E?
All HZS24NB2TA-E units undergo pre-shipment inspection (PSI). If there is an issue with HZS24NB2TA-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 HZS24NB2TA-E part is unused and in its original packaging.
Return procedure for HZS24NB2TA-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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