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Nexperia USA Inc. BZT52H-B24-QX
- Part No.:
- BZT52H-B24-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52H-B24-QX.pdf
- Description:
- DIODE ZENER 24V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:7,307
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Product details
Overview
BZT52H-B24-QX from Nexperia is a 24 V ±2 % Zener voltage regulator diode in SOD123F package, rated for 830 mW total power dissipation at 25 °C ambient, with 220 Ω typical differential resistance at IZ = 5 mA and 30 μA reverse current at VR = 19.2 V, used for precision voltage reference and overvoltage protection in automotive power rails.
For engineers reviewing the BZT52H-B24-QX datasheet, BZT52H-B24-QX pinout, BZT52H-B24-QX application, or BZT52H-B24-QX equivalent, key selection criteria include Zener voltage tolerance (±2 %), AEC-Q101 qualification, thermal resistance to solder point (150 K/W), and non-repetitive peak reverse current capability (1.25 A).
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable 24 V regulation across load and line variations, with temperature coefficient of +16.8 mV/K at IZ = 5 mA and junction-to-ambient thermal resistance of 330 K/W on standard FR4 PCB. Its low 0.9 V forward voltage at 10 mA supports bidirectional clamping configurations.
The device features graded doping for controlled breakdown characteristics, optimized metallization for robust surge handling (40 W non-repetitive peak power), and cathode-marked SOD123F packaging enabling automated optical inspection and high-density placement in automotive control modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 23.5 V to 24.5 V at IZ = 5 mA - defines regulated output voltage window under nominal bias |
| Tolerance | ±2 % - ensures tight voltage accuracy for feedback loops in DC-DC converters |
| Differential Resistance (rdif) | 220 Ω max at IZ = 5 mA - determines regulation stiffness and output impedance |
| Reverse Current (IR) | 30 μA max at VR = 19.2 V - sets leakage-induced error in high-impedance reference circuits |
| Total Power Dissipation (Ptot) | 830 mW at Tamb ≤ 25 °C - establishes maximum continuous thermal load on PCB pad |
| Junction Temperature (Tj) | −65 °C to +150 °C - enables operation in under-hood automotive environments |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including HTOL, TC, and ESD testing |
Pinout & Package
SOD123F surface-mount plastic package: 2-terminal, flat lead, cathode-bar marked, dimensions 3.5 mm × 1.7 mm × 1.0 mm (L × W × H), designed for reflow soldering only.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal for polarity-sensitive placement |
| 2 | Anode (A) | Connected to ground or lower-potential rail; forms reverse-biased junction for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q101 compliant - qualified for engine control units, body electronics, and ADAS power domains |
| Thermal performance | Rth(j-sp) = 150 K/W - enables reliable heat transfer to cathode solder pad on 1 cm² copper area |
| Voltage stability | +16.8 mV/K tempco at 5 mA - predictable drift behavior simplifies temperature compensation in sensor references |
| Surge robustness | IZSM = 1.25 A (100 μs pulse) - withstands load-dump transients in 12 V/24 V vehicle systems |
| Low-profile mounting | SOD123F footprint - fits <1.0 mm board height constraints in compact ECUs and infotainment modules |
Applications
| Engine Control Unit (ECU) Reference | Infotainment Power Rail Clamp |
|---|---|
Use Scenario: Stabilizing 24 V supply for microcontroller ADC reference in diesel ECU modules. IC Role / Device Role / Timing Role: Zener shunt regulator providing precise 24 V reference for analog front-end calibration. Use Value: ±2 % tolerance and 220 Ω rdif ensure <±10 mV reference error across operating temperature range. |
Use Scenario: Clamping transient spikes on 24 V display backlight power rail in automotive head units. IC Role / Device Role / Timing Role: Overvoltage protector absorbing ISO 7637-2 Pulse 5a energy surges. Use Value: 1.25 A non-repetitive peak current rating handles 40 W surge pulses without degradation. |
| ADAS Camera Module Bias | Body Control Module (BCM) Sensor Interface |
Use Scenario: Generating stable bias voltage for CMOS image sensor analog circuitry in surround-view cameras. IC Role / Device Role / Timing Role: Low-noise voltage reference source decoupled from noisy 24 V main rail. Use Value: 30 μA reverse leakage at 19.2 V minimizes quiescent current draw in always-on camera subsystems. |
Use Scenario: Regulating 24 V input to Hall-effect position sensors in door latch and seat motor assemblies. IC Role / Device Role / Timing Role: Primary voltage clamp protecting sensor IC inputs from battery reversal and jump-start events. Use Value: AEC-Q101 qualification ensures 15-year field reliability under cyclic thermal stress in cabin environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZT52H-C24-Q | ±5 % tolerance, higher 25.6 V max VZ, 220 Ω rdif, 30 μA IR | Acceptable where tighter voltage accuracy not required; lower cost for non-critical biasing | Select when system-level tolerance budget allows >±2 % variation and cost sensitivity outweighs precision needs |
| MMSZ5245B-TP | 24 V ±5 %, SOD-123 package, 500 mW Ptot, 30 μA IR at 19.2 V, no AEC-Q101 qualification | Limited to industrial/commercial use; lacks automotive reliability validation and surge rating | Choose only for non-automotive designs where AEC-Q101 compliance and 1.25 A surge immunity are unnecessary |
Compared with BZT52H-B24-QX, BZT52H-C24-Q trades voltage accuracy for cost in non-safety-critical roles, while MMSZ5245B-TP omits automotive qualification and thermal derating margin-making the BZT52H-B24-QX the sole option meeting full AEC-Q101 requirements for 24 V Zener regulation in vehicle systems.
Availability
BZT52H-B24-QX is available at Aetrix Electronics and suitable for automotive ECU reference design, ADAS camera biasing, and BCM sensor interface applications requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for BZT52H-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 focused on essential efficiency technologies, delivering high-performance, reliable discrete and logic devices for automotive, industrial, and consumer markets.
The BZT52H-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for automotive voltage regulation, transient suppression, and reference stability in harsh-temperature, high-reliability environments.
FAQ
What is the maximum continuous power dissipation for BZT52H-B24-QX at 85 °C ambient?
At 85 °C ambient, the maximum continuous power dissipation is derated to 530 mW, calculated using the 830 mW rating at 25 °C and thermal resistance Rth(j-a) = 330 K/W, ensuring junction temperature remains below 150 °C under steady-state conditions.
Does BZT52H-B24-QX support bidirectional ESD protection?
No - it is a unidirectional Zener diode optimized for reverse-bias regulation; its forward voltage is 0.9 V at 10 mA, but it lacks symmetric clamping characteristics or specified ESD ratings required for IEC 61000-4-2 protection.
How does the temperature coefficient affect regulation accuracy over −40 °C to +125 °C?
With +16.8 mV/K coefficient at 5 mA, VZ increases by approximately 2.8 V across the full automotive temperature range, resulting in a worst-case shift from 23.5 V to 26.3 V - requiring system-level compensation or tolerance allocation in feedback networks.
Can BZT52H-B24-QX replace BZX84-C24 in existing designs?
No - BZX84-C24 uses SOT-23 package (3-pin, anode/cathode/NC), while BZT52H-B24-QX is SOD123F (2-pin, anode/cathode); footprint, thermal profile, and surge rating differ significantly, necessitating PCB and layout revision.
BZT52H-B24-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZT52H-Q
- Package/Case:
- SOD-123F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 24 V
- Tolerance:
- ±2.08%
- Power - Max:
- 375 mW
- Impedance (Max) (Zzt):
- 30 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 16.8 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
BZT52H-B24-QX FAQ
1.How can I place an order for BZT52H-B24-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52H-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 BZT52H-B24-QX reliable?
The price and inventory of BZT52H-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 BZT52H-B24-QX is usually 5 days.
3.What payment methods are accepted for BZT52H-B24-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52H-B24-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52H-B24-QX?
BZT52H-B24-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52H-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 BZT52H-B24-QX?
For technical support, including BZT52H-B24-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52H-B24-QX requirements.
6.How does Aetrix verify that BZT52H-B24-QX is sourced from the original manufacturer or authorized distributors?
All BZT52H-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 BZT52H-B24-QX meets industry standards.
7.What is the process for return or replacement of BZT52H-B24-QX?
All BZT52H-B24-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZT52H-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 BZT52H-B24-QX part is unused and in its original packaging.
Return procedure for BZT52H-B24-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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