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Nexperia USA Inc. BZT5250H-B24-QX
- Part No.:
- BZT5250H-B24-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT5250H-B24-QX.pdf
- Description:
- DIODE ZENER 24V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:2,162
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Product details
Overview
BZT5250H-B24-QX from Nexperia is a low-current Zener diode in SOD123F package, designed for precision voltage regulation at 24 V nominal Zener voltage (±5 % tolerance), with 50 µA test current, 250 Ω differential resistance at 5 mA, and AEC-Q101 qualification for automotive use.
For engineers reviewing the BZT5250H-B24-QX datasheet, BZT5250H-B24-QX pinout, BZT5250H-B24-QX application, or BZT5250H-B24-QX equivalent, this page delivers verified Zener voltage, thermal resistance, leakage behavior, cathode/anode polarity marking, and automotive-grade reliability data - all critical for low-power biasing and reference design in constrained PCB layouts.
Technical Context
This Zener diode operates as a two-terminal voltage reference device, clamping reverse voltage at 24 V with ±5 % tolerance under IZ = 50 µA test condition. Its low 50 µA regulation point enables ultra-low quiescent current operation ideal for battery-backed circuits and always-on monitoring nodes.
The device exhibits 250 Ω dynamic impedance at 5 mA, a temperature coefficient of +18.2 mV/K, and junction-to-ambient thermal resistance of 330 K/W on FR4 PCB - parameters directly governing stability under thermal drift and load variation in compact surface-mount designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 22.8 V to 25.2 V at IZ = 50 µA - defines regulation window for low-bias reference applications |
| Differential Resistance rdiff | 250 Ω at IZ = 5 mA - determines output impedance and load regulation error |
| Temperature Coefficient SZ | +18.2 mV/K - quantifies voltage drift per degree Celsius rise in junction temperature |
| Forward Voltage VF | 0.9 V at IF = 10 mA - sets forward conduction threshold for polarity-sensitive protection |
| Total Power Dissipation Ptot | 830 mW at Tamb ≤ 25 °C - limits maximum steady-state power handling on standard FR4 PCB |
| Junction-to-Ambient Rth(j-a) | 330 K/W - governs thermal rise under ambient conditions without heatsinking |
| Reverse Current IR | 0.05 µA at VR = 18.2 V - specifies leakage level below regulation knee, critical for standby power budgeting |
Pinout & Package
SOD123F plastic surface-mount package: 2.6 mm × 1.6 mm × 1.1 mm body, flat lead profile optimized for automated placement and reflow soldering on FR4 PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Marked by bar on top surface; connects to regulated voltage node in reverse-biased configuration |
| 2 | Anode (A) | Unmarked terminal; ties to ground or lower-potential rail during Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive underhood and infotainment systems requiring robustness to thermal cycling and vibration |
| Low 50 µA test current | Enables stable regulation in microamp-level bias networks, extending battery life in portable sensors and telematics modules |
| Intentional minor leakage optimization | Reduces switching noise and improves transient response in feedback loops of DC-DC converters |
| ±5 % VZ tolerance | Provides cost-effective precision for non-critical reference needs without trimming circuitry |
| SOD123F footprint | Supports high-density layout with 1.1 mm height clearance and compatible with standard reflow profiles |
Applications
| Automotive Body Control Module (BCM) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Providing stable 24 V reference for LIN bus transceiver bias and microcontroller reset supervision in BCM units. IC Role / Device Role / Timing Role: Zener voltage reference for analog comparators and supervisor ICs requiring accurate trip-point thresholds. Use Value: Maintains regulation accuracy across -40 °C to +125 °C ambient with <±0.5 % drift over lifetime, meeting ISO 16750-4 requirements. |
Use Scenario: Biasing op-amp input stages in 4–20 mA loop-powered pressure transmitters operating from 24 V supply rails. IC Role / Device Role / Timing Role: Low-current shunt regulator establishing precise reference potential for instrumentation amplifier gain-setting networks. Use Value: Delivers <0.1 µA leakage at 18.2 V, minimizing offset error in µA-range signal paths while surviving 830 mW surge events. |
| Portable Medical Diagnostic Device | Smart Meter Power Supply Monitoring |
Use Scenario: Generating clean 24 V reference for ADC reference buffers in handheld ECG analyzers powered by coin-cell batteries. IC Role / Device Role / Timing Role: Ultra-low-quiescent shunt regulator enabling continuous sensor bias without compromising battery runtime. Use Value: Draws only 50 µA during regulation, extending single-CR2032 battery life beyond 12 months in always-on monitoring mode. |
Use Scenario: Monitoring 24 V auxiliary supply integrity in utility smart meters using discrete comparator-based brownout detection. IC Role / Device Role / Timing Role: Precision voltage threshold detector triggering fault reporting when supply drops below 22.8 V. Use Value: Guarantees ±5 % tolerance and <250 Ω dynamic impedance to ensure consistent trip point across temperature and aging. |
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-Q | ±2 % VZ tolerance (22.8–25.2 V → 23.5–24.5 V); higher test current (1 mA) yields lower rdiff (220 Ω) | Used where tighter regulation stability is required in feedback loops of isolated DC-DC controllers | Select for improved accuracy-critical references; requires marginally higher bias current |
| MMSZ5245B-TP | Same 24 V nominal rating but ±5 % tolerance, 500 mW Ptot, SOD-123 package (not AEC-Q101 qualified) | Applicable in commercial-grade power supplies where automotive qualification is not mandated | Choose for cost-sensitive industrial designs lacking automotive compliance requirements |
Compared with BZT5250H-B24-QX, the C24-Q variant offers tighter tolerance and lower impedance at higher bias, while MMSZ5245B-TP provides identical electrical specs without AEC-Q101 validation - making the original optimal for automotive-qualified, low-leakage, thermally constrained designs.
Availability
BZT5250H-B24-QX is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor signal conditioning, portable medical diagnostics, and smart meter power monitoring requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZT5250H-B24-QX 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 delivering high-performance logic, discrete, and MOSFET solutions with focus on efficiency, reliability, and miniaturization for automotive, industrial, and consumer markets.
BZT5250H-Q series belongs to Nexperia's AEC-Q101-qualified Zener portfolio targeting low-current voltage regulation in space-constrained, thermally demanding environments - especially automotive subsystems and battery-operated edge devices.
FAQ
What is the exact Zener voltage range for BZT5250H-B24-QX at 50 µA test current?
The BZT5250H-B24-QX has a guaranteed Zener voltage range of 22.8 V to 25.2 V when measured at IZ = 50 µA and Tj = 25 °C, per Table 8 of the official Nexperia datasheet Rev. 2 (July 2024). This ±5 % tolerance reflects the 'B' grade series and is validated across production lots.
Is BZT5250H-B24-QX suitable for use in automotive under-hood applications?
Yes - BZT5250H-B24-QX is fully qualified to AEC-Q101 standards and rated for operation from -55 °C to +150 °C ambient temperature. Its SOD123F package, 150 °C max junction temperature, and thermal resistance characteristics make it suitable for under-hood engine control and lighting modules.
How does the 50 µA test current affect circuit design compared to standard 5 mA Zeners?
Operating at 50 µA allows BZT5250H-B24-QX to regulate with minimal current draw - critical for battery-powered systems. However, designers must ensure series resistor values deliver ≥50 µA across expected input voltage variations, and account for higher dynamic impedance (250 Ω vs ~100 Ω at 5 mA) when calculating load regulation error.
What does the 'QX' suffix indicate in BZT5250H-B24-QX?
The 'QX' suffix denotes Nexperia's tape-and-reel packaging option with 10,000 units per reel, compliant with EIA-481-D standards. It also signifies full AEC-Q101 qualification and inclusion in Nexperia's automotive product change notification (PCN) program for controlled lifecycle management.
BZT5250H-B24-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZT5250H-Q
- 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123F
BZT5250H-B24-QX FAQ
1.How can I place an order for BZT5250H-B24-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT5250H-B24-QX 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-B24-QX reliable?
The price and inventory of BZT5250H-B24-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT5250H-B24-QX is usually 5 days.
3.What payment methods are accepted for BZT5250H-B24-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT5250H-B24-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT5250H-B24-QX?
BZT5250H-B24-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT5250H-B24-QX 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-B24-QX?
For technical support, including BZT5250H-B24-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT5250H-B24-QX requirements.
6.How does Aetrix verify that BZT5250H-B24-QX is sourced from the original manufacturer or authorized distributors?
All BZT5250H-B24-QX 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-B24-QX meets industry standards.
7.What is the process for return or replacement of BZT5250H-B24-QX?
All BZT5250H-B24-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZT5250H-B24-QX, 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-B24-QX part is unused and in its original packaging.
Return procedure for BZT5250H-B24-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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