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Nexperia USA Inc. BZT52H-A24X
- Part No.:
- BZT52H-A24X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52H-A24X.pdf
- Description:
- DIODE ZENER 24V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:3,219
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Product details
Overview
BZT52H-A24X from Nexperia is a precision Zener voltage regulator diode in SOD123F package, designed for stable 24 V reference and clamping in low-power analog circuits. It delivers ±1 % tolerance at IZ = 5 mA, 220 Ω differential resistance, and operates with ≤ 830 mW total power dissipation at Tamb ≤ 25 °C - used in power supply feedback loops and overvoltage protection stages.
For engineers reviewing the BZT52H-A24X datasheet, BZT52H-A24X pinout, BZT52H-A24X application, or BZT52H-A24X equivalent, key selection criteria include its 24.0 V nominal Zener voltage (23.76–24.24 V range), low temperature coefficient of +0.05 mV/K, 55 pF capacitance at 1 MHz, and SOD123F surface-mount compatibility for space-constrained PCB layouts.
Technical Context
This Zener diode operates in reverse breakdown to maintain a stable DC reference voltage under varying load and temperature conditions. Its design centers on tight voltage regulation (±1 %), low dynamic impedance (220 Ω max at 5 mA), and thermal stability across –65 °C to +150 °C ambient range.
The device uses silicon planar technology with cathode-anode polarity marked by a bar on the SOD123F body. It supports non-repetitive surge currents up to 1.25 A (100 μs pulse) and exhibits predictable reverse current behavior below 0.1 μA at VR = 19.2 V (80 % of VZ).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 24.0 V nominal (23.76–24.24 V min/max at IZ = 5 mA); enables precise 24 V rail sensing and regulation |
| Tolerance | ±1 %; ensures minimal unit-to-unit variation in voltage-critical feedback networks |
| Differential Resistance rdif | ≤ 220 Ω at IZ = 5 mA; maintains low output impedance for stable reference under load changes |
| Power Dissipation Ptot | 830 mW at Tamb ≤ 25 °C on FR4 PCB with 1 cm² cathode pad; defines maximum continuous DC power handling |
| Reverse Current IR | ≤ 0.1 μA at VR = 19.2 V; guarantees negligible leakage in high-impedance bias/reference paths |
| Capacitance Cd | 55 pF at f = 1 MHz, VR = 0 V; limits high-frequency noise coupling in signal conditioning circuits |
| Forward Voltage VF | ≤ 0.9 V at IF = 10 mA; allows use as low-drop rectifier or clamp in dual-polarity protection schemes |
Pinout & Package
SOD123F is a compact, flat-lead surface-mount plastic package measuring 3.6 mm × 1.7 mm × 1.0 mm (L × W × H), optimized for automated reflow assembly and high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal for correct orientation during placement |
| 2 | Anode (A) | Connected to ground or lower-potential rail; reverse-biased operation requires anode at lower voltage than cathode |
Key Features
| Feature | Design Value |
|---|---|
| High-precision voltage regulation | ±1 % tolerance at 5 mA ensures < ±0.24 V deviation in 24 V reference applications |
| Low thermal drift | +0.05 mV/K temperature coefficient minimizes voltage shift over industrial temperature range |
| Robust surge capability | Withstands 1.25 A non-repetitive peak reverse current (100 μs pulse) for transient overvoltage suppression |
| Space-efficient packaging | SOD123F footprint occupies only 6.12 mm² PCB area, supporting miniaturized power management designs |
| Low leakage performance | < 0.1 μA reverse current at 80 % VZ preserves accuracy in high-impedance voltage divider networks |
Applications
| Industrial Power Supply Feedback | Microcontroller Reset Circuit |
|---|---|
|
Use Scenario: Stabilizing feedback voltage in isolated DC-DC converter secondary-side regulation. IC Role / Device Role / Timing Role: Zener diode provides precise 24 V reference to optocoupler input, enabling accurate output voltage control. Use Value: ±1 % tolerance ensures output regulation within ±0.5 % over line/load/temperature, meeting EN 62368-1 requirements. |
Use Scenario: Generating clean reset threshold for 3.3 V microcontrollers during brown-out events. IC Role / Device Role / Timing Role: Configured as shunt regulator with resistor divider to produce 2.0 V reset trigger from 5 V rail. Use Value: Low 55 pF capacitance avoids timing jitter in reset assertion; <0.1 μA leakage prevents false triggering. |
| Automotive Sensor Signal Conditioning | USB-C ESD Protection Clamp |
|
Use Scenario: Biasing and voltage limiting in analog front-end of pressure sensor interface. IC Role / Device Role / Timing Role: Clamps sensor output excursions beyond 24 V supply rail to protect downstream ADC inputs. Use Value: 220 Ω dynamic impedance ensures fast response to transients while maintaining <100 ns clamping latency. |
Use Scenario: Secondary-stage overvoltage clamp on USB-C CC lines during hot-plug events. IC Role / Device Role / Timing Role: Shunt-connected between CC and GND to absorb 100 V/100 ns surges per IEC 61000-4-2 Level 4. Use Value: 830 mW power rating sustains repeated 1.25 A surges without degradation; SOD123F enables 0402-compatible layout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZT52H-B24 | ±2 % tolerance (23.5–24.5 V), 220 Ω rdif, same SOD123F package | Acceptable where tighter regulation not required; higher production yield lowers cost | Select when system-level calibration compensates for wider voltage spread |
| MMSZ5245B | ±5 % tolerance (22.8–25.2 V), 30 Ω rdif, SOD-123 package (mechanically identical) | Higher dynamic impedance improves noise rejection but reduces regulation accuracy | Prefer for cost-sensitive consumer electronics where ±5 % is acceptable and lower rdif aids transient response |
Compared with BZT52H-A24X, BZT52H-B24 trades 1 % precision for broader availability and lower unit cost, while MMSZ5245B offers lower dynamic impedance at the expense of voltage accuracy - making the A24X optimal for closed-loop feedback requiring traceable 24 V references.
Availability
BZT52H-A24X is available at Aetrix Electronics and suitable for industrial power supplies, microcontroller reset circuits, and sensor signal conditioning requiring stable component supply with guaranteed long-term continuity.
Supply support for BZT52H-A24X 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 for automotive, industrial, and consumer markets.
The BZT52H series belongs to Nexperia's precision Zener diode product line, engineered specifically for stable voltage reference and clamping in space-constrained, thermally demanding applications where ±1 % accuracy and robust surge immunity are critical.
FAQ
What is the maximum continuous reverse current the BZT52H-A24X can handle at 25 °C?
The BZT52H-A24X is rated for continuous operation at up to 250 mA forward current, but as a Zener diode, its reverse (Zener) current is limited by power dissipation. At 24 V and 25 °C ambient, the maximum continuous Zener current is 34.6 mA (830 mW ÷ 24 V), assuming ideal thermal conditions and no derating.
Does the BZT52H-A24X meet automotive qualification standards?
No. Per Nexperia's revision history (Rev. 7, January 2023), the BZT52H series is explicitly designated as non-automotive qualified. Automotive-grade alternatives are available under the -Q suffix (e.g., BZT52H-A24X-Q) and undergo AEC-Q101 stress testing.
How does the temperature coefficient affect regulation accuracy over –40 °C to +125 °C?
With a specified +0.05 mV/K temperature coefficient at IZ = 2 mA, the BZT52H-A24X exhibits approximately ±1.25 V drift over a 250 K span (–40 °C to +125 °C). However, actual drift is nonlinear and minimized near 24 V due to curvature compensation in the Zener structure.
Can the BZT52H-A24X be used in parallel for higher power handling?
No. Parallel connection of Zener diodes is not recommended due to mismatched breakdown voltages causing current hogging. For higher power, use a single higher-rated device (e.g., BZX84-A24 in SOT23) or add a series ballast resistor to balance current sharing.
BZT52H-A24X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZT52H
- Package/Case:
- SOD-123F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 24 V
- Tolerance:
- ±1%
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123F
BZT52H-A24X FAQ
1.How can I place an order for BZT52H-A24X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52H-A24X 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-A24X reliable?
The price and inventory of BZT52H-A24X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52H-A24X is usually 5 days.
3.What payment methods are accepted for BZT52H-A24X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52H-A24X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52H-A24X?
BZT52H-A24X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52H-A24X 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-A24X?
For technical support, including BZT52H-A24X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52H-A24X requirements.
6.How does Aetrix verify that BZT52H-A24X is sourced from the original manufacturer or authorized distributors?
All BZT52H-A24X 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-A24X meets industry standards.
7.What is the process for return or replacement of BZT52H-A24X?
All BZT52H-A24X units undergo pre-shipment inspection (PSI). If there is an issue with BZT52H-A24X, 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-A24X part is unused and in its original packaging.
Return procedure for BZT52H-A24X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZT52H-A24X Tags
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MMSZ5231B-7-F
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MM5Z5V1ST1G
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