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Nexperia USA Inc. BZT5250H-B24X
- Part No.:
- BZT5250H-B24X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT5250H-B24X.pdf
- Description:
- DIODE ZENER 24V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:8,696
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Product details
Overview
BZT5250H-B24X from Nexperia is a low-current Zener diode in SOD123F package, rated for 24 V nominal Zener voltage (±5 % tolerance), 50 µA test current, and 830 mW total power dissipation. It functions as a precision voltage reference or low-power regulation element in battery-powered sensor nodes and portable microcontroller I/O protection circuits.
For engineers reviewing the BZT5250H-B24X datasheet, BZT5250H-B24X pinout, BZT5250H-B24X application, or BZT5250H-B24X equivalent, key selection criteria include its 24 V Zener voltage with ±5 % tolerance, low 50 µA test current specification, 250 Ω differential resistance at 5 mA, and intentional leakage optimization for noise-sensitive analog front-ends.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage under low bias conditions. Its specified 24 V nominal Zener voltage (B-series) is guaranteed at IZ = 50 µA, with differential resistance of 250 Ω at IZ = 5 mA and temperature coefficient of +0.05 mV/K.
The device uses an SOD123F surface-mount package with cathode-marked lead configuration, optimized for thermal performance via 1 cm² cathode pad (Rth(j-sp) = 70 K/W). It features intentionally elevated leakage current to reduce switching noise per AN90031.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 24 V nominal, ±5 % tolerance at IZ = 50 µA - defines precise clamping level for low-bias regulation |
| Differential Resistance rdiff | 250 Ω max at IZ = 5 mA - determines voltage regulation stiffness under load variation |
| Reverse Current IR | 0.05 µA max at VR = 18.2 V - enables ultra-low standby power in always-on circuits |
| Total Power Dissipation Ptot | 830 mW at Tamb ≤ 25 °C with 1 cm² cathode pad - sets maximum continuous power handling |
| Forward Voltage VF | 0.9 V max at IF = 10 mA - ensures minimal forward conduction loss in bidirectional protection |
| Junction Temperature Tj | 150 °C maximum - defines upper thermal limit for reliable long-term operation |
| Thermal Resistance Rth(j-sp) | 70 K/W - quantifies heat transfer efficiency from junction to cathode solder point |
Pinout & Package
SOD123F plastic surface-mount package: 2.6 mm × 1.6 mm × 1.1 mm body, flat leads, cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal for correct PCB orientation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; forms reverse-biased junction for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| Low-test-current Zener operation | Specified at 50 µA - enables stable regulation in µA-level bias networks without loading sensitive sources |
| Optimized leakage profile | Intentional minor rise per AN90031 - reduces high-frequency noise and improves transient response in analog signal paths |
| High-precision voltage tolerance | ±5 % (B-series) - supports accurate voltage referencing where tight absolute accuracy is required |
| Compact SMD footprint | SOD123F package - allows dense placement in space-constrained portable and wearable electronics |
| Thermally enhanced mounting | 70 K/W Rth(j-sp) with 1 cm² cathode pad - delivers 2× higher power capability than standard FR4 layout |
Applications
| Portable Sensor Node Power Rail Clamping | Microcontroller I/O Pin ESD Protection |
|---|---|
Use Scenario: Protecting 24 V supply rail in battery-operated environmental sensors against overvoltage transients during wake-up cycles. IC Role / Device Role / Timing Role: Zener clamp limiting rail excursion to 24.6 V during surge events while drawing <1 µA in steady state. Use Value: Prevents brownout resets and extends battery life by eliminating quiescent current penalty of active regulators. |
Use Scenario: Safeguarding 3.3 V GPIO pins of ARM Cortex-M0+ MCU against ESD and coupling-induced spikes from adjacent 24 V actuators. IC Role / Device Role / Timing Role: Fast-reacting shunt element that clamps transients within 10 ns while maintaining sub-100 pF capacitance at 0 V. Use Value: Preserves signal integrity on high-speed digital lines without degrading edge rates or causing false triggering. |
| Low-Power Reference for ADC Biasing | Backup Voltage Monitor in Energy-Harvesting Systems |
Use Scenario: Providing stable 24 V reference for ratiometric pressure transducer excitation in wireless telemetry modules. IC Role / Device Role / Timing Role: Precision voltage source delivering 24 V ±1.2 V across -40 °C to +85 °C with <0.1 %/°C drift. Use Value: Enables direct ratiometric conversion without calibration, reducing firmware complexity and memory usage. |
Use Scenario: Detecting end-of-life voltage drop in supercapacitor-backed real-time clock circuits operating from harvested vibration energy. IC Role / Device Role / Timing Role: Threshold detector triggering system shutdown when stored energy falls below 22.8 V (–5 % of nominal). Use Value: Guarantees graceful data retention and timekeeping continuity before complete power loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZT5250H-C24 | Same 24 V nominal voltage but ±2 % tolerance and lower leakage (0.05 µA vs. B-series' unspecified higher leakage) | Preferred where tighter voltage accuracy is critical and noise reduction is secondary | Select C24 for metrology-grade references; retain B24X for noise-sensitive analog front-ends |
| MMSZ5250B-TP | 24 V Zener, ±5 %, but rated at 20 mA test current and 500 mW Ptot; no intentional leakage optimization | Suitable for higher-current regulation but lacks low-noise design for sensor interfaces | Choose MMSZ5250B-TP only when >100 µA bias current is available and noise immunity is not required |
Compared with BZT5250H-C24, the B24X trades voltage accuracy for lower noise; versus MMSZ5250B-TP, it delivers superior low-current stability and thermal performance in compact layouts - making it optimal for battery-constrained, noise-critical designs.
Availability
BZT5250H-B24X is available at Aetrix Electronics and suitable for portable sensor nodes, microcontroller I/O protection, low-power ADC biasing, and energy-harvesting backup monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZT5250H-B24X 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
Nexperia is a global semiconductor expert focused on high-volume, high-reliability logic, discrete, and MOSFET solutions with strong automotive and industrial market presence.
The BZT5250H series belongs to Nexperia's low-current Zener portfolio, engineered specifically for ultra-low-bias voltage regulation and noise-sensitive analog signal conditioning in portable and battery-powered systems.
FAQ
What is the exact Zener voltage tolerance for BZT5250H-B24X?
The BZT5250H-B24X has a nominal Zener voltage of 24 V with ±5 % tolerance, verified at IZ = 50 µA and Tj = 25 °C. This corresponds to a guaranteed range of 22.8 V to 25.2 V under specified test conditions, as confirmed in Table 8 of the official Nexperia datasheet Rev. 1 (2024-07-18).
Can BZT5250H-B24X be used in place of a standard 24 V Zener diode like 1N4749A?
No - the BZT5250H-B24X is optimized for low-current operation (50 µA test current) and features intentional leakage tuning for noise reduction, whereas the 1N4749A is rated at 5.2 mA and lacks this behavior. Substituting it in high-current regulator circuits risks poor regulation and thermal instability due to mismatched rdiff and power derating.
What is the maximum reverse voltage before breakdown for BZT5250H-B24X?
The BZT5250H-B24X begins controlled Zener breakdown at approximately 22.8 V (–5 % of nominal) and reaches full regulation by 24 V. Its absolute maximum non-repetitive peak reverse voltage is not defined; instead, it is limited by PZSM = 40 W for 100 µs pulses, corresponding to ~280 V at 143 mA peak current under those transient conditions.
Does BZT5250H-B24X require a heatsink in typical PCB layouts?
No external heatsink is required. With Rth(j-sp) = 70 K/W and Ptot = 830 mW at Tamb ≤ 25 °C, junction temperature rise is ~58 K - well within the 150 °C limit. Performance relies on proper 1 cm² cathode copper pad per datasheet Figure 9; standard FR4 footprints increase thermal resistance and may require derating.
BZT5250H-B24X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZT5250H
- Package/Case:
- SOD-123F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 24 V
- Tolerance:
- ±2%
- Power - Max:
- 375 mW
- Impedance (Max) (Zzt):
- 70 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 18.2 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123F
BZT5250H-B24X FAQ
1.How can I place an order for BZT5250H-B24X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT5250H-B24X 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 BZT5250H-B24X reliable?
The price and inventory of BZT5250H-B24X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT5250H-B24X is usually 5 days.
3.What payment methods are accepted for BZT5250H-B24X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT5250H-B24X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT5250H-B24X?
BZT5250H-B24X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT5250H-B24X 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 BZT5250H-B24X?
For technical support, including BZT5250H-B24X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT5250H-B24X requirements.
6.How does Aetrix verify that BZT5250H-B24X is sourced from the original manufacturer or authorized distributors?
All BZT5250H-B24X 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 BZT5250H-B24X meets industry standards.
7.What is the process for return or replacement of BZT5250H-B24X?
All BZT5250H-B24X units undergo pre-shipment inspection (PSI). If there is an issue with BZT5250H-B24X, 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 BZT5250H-B24X part is unused and in its original packaging.
Return procedure for BZT5250H-B24X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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