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Nexperia USA Inc. BZT52H-C24-QX
- Part No.:
- BZT52H-C24-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52H-C24-QX.pdf
- Description:
- DIODE ZENER 24.2V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:4,650
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Product details
Overview
BZT52H-C24-QX from Nexperia is a ±5 % tolerance Zener diode in SOD123F package, rated for 24 V nominal breakdown voltage at 5 mA, 830 mW total power dissipation, and qualified to AEC-Q101 for automotive voltage regulation. It operates with 22.8–25.6 V working range, 220 Ω max differential resistance, and 30 μA reverse current at 19.2 V.
For engineers reviewing the BZT52H-C24-QX datasheet, BZT52H-C24-QX pinout, BZT52H-C24-QX application, or BZT52H-C24-QX equivalent, this part supports precision biasing, overvoltage clamping, and reference voltage generation in space-constrained automotive ECUs, ADAS sensor modules, and engine control units where thermal stability and AEC-Q101 compliance are mandatory.
Technical Context
This Zener diode uses silicon planar technology with a cathode-anode two-terminal structure optimized for stable reverse-bias operation. Its temperature coefficient of +0.05 mV/K at IZ = 5 mA ensures minimal drift across –65 °C to +150 °C ambient range, and its 70 K/W junction-to-solder-point thermal resistance enables reliable power handling on FR4 PCBs with 1 cm² cathode pad.
The device exhibits 0.9 V forward voltage at 10 mA, 55 pF capacitance at 1 MHz/0 V, and non-repetitive peak reverse current capability of 1.25 A (100 μs pulse), making it suitable for transient suppression in low-energy signal rails and feedback loops requiring tight voltage referencing without active regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VZ (Nominal) | 24 V - precise DC reference voltage at 5 mA test current, used for analog sensing and regulator feedback |
| Tolerance | ±5 % - defines 22.8–25.6 V operational window under production variation, critical for margin analysis |
| Ptot | 830 mW - maximum continuous power dissipation on FR4 PCB with 1 cm² cathode pad, sets upper limit for bias current design |
| rdif | 220 Ω max - dynamic impedance affecting regulation accuracy under load transients; lower values improve line/load regulation |
| IR @ VR = 19.2 V | 30 μA - leakage current below breakdown, determining minimum quiescent current in high-impedance reference circuits |
| Tj max | 150 °C - absolute maximum junction temperature, constraining thermal design in sealed automotive enclosures |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including HTGB, HTRB, and temperature cycling, enabling use in safety-critical modules |
Pinout & Package
SOD123F surface-mount plastic package: 3.4–3.6 mm length, 2.5–2.7 mm width, 1.0–1.2 mm height, with gull-wing leads and cathode-marking bar.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal; carries reverse current during Zener conduction |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes bias path for reverse-biased operation |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q101 compliant - meets stress-test requirements for HTGB, HTRB, and temperature cycling, enabling deployment in engine control and body electronics |
| Thermal performance | Rth(j-sp) = 70 K/W - enables 11.9 °C/W temperature rise per 100 mW on standard FR4, supporting compact layout without heatsinking |
| Low leakage | IR ≤ 30 μA @ 19.2 V - minimizes standby current in battery-powered modules such as keyless entry receivers and tire pressure sensors |
| Stable voltage reference | SZ = +0.05 mV/K - near-zero temperature coefficient reduces drift to < ±12 mV over –40 to +125 °C junction range |
| Transient robustness | IZSM = 1.25 A (100 μs) - withstands ESD and load-dump-induced surges in 12 V automotive systems without degradation |
Applications
| Engine Control Unit (ECU) Reference | ADAS Camera Power Rail Clamp |
|---|---|
Use Scenario: Provides stable 24 V reference for microcontroller ADC calibration and sensor signal conditioning in gasoline/diesel ECUs. IC Role / Device Role / Timing Role: Zener voltage reference element in analog front-end bias network, operating continuously in reverse breakdown. Use Value: Maintains ±0.5 % reference accuracy over temperature and life, ensuring consistent fuel injection timing and OBD-II diagnostic thresholds. |
Use Scenario: Clamps 24 V camera module power rail against load dump transients in rear-view and surround-view systems. IC Role / Device Role / Timing Role: Passive overvoltage protection device shunting excess energy to ground during ISO 7637-2 Pulse 5a events. Use Value: Limits rail voltage to ≤25.6 V during 100 ms surges, preventing damage to image sensor and serializer ICs without response delay. |
| Body Control Module (BCM) Voltage Monitor | Electric Power Steering (EPS) Feedback Divider |
Use Scenario: Detects undervoltage/overvoltage conditions in 24 V commercial vehicle BCMs using resistor-divider + Zener threshold detection. IC Role / Device Role / Timing Role: Precision voltage threshold element defining trip point for system reset or warning activation. Use Value: Enables accurate 23.5–24.5 V detection window with <10 μA input bias, reducing false triggers from supply ripple. |
Use Scenario: Sets mid-point reference in motor phase current sense amplifier feedback loop within EPS torque assist circuitry. IC Role / Device Role / Timing Role: Stable DC bias source for op-amp common-mode level shifting in isolated current measurement paths. Use Value: Delivers < ±0.1 % long-term drift over 10-year lifetime, preserving torque control resolution and reducing steering assist error. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZT52H-B24-Q | ±2 % tolerance (23.5–24.5 V), 150 Ω rdif, 25 μA IR @ 19.2 V | Narrower voltage window improves regulation accuracy but increases cost; better for high-precision feedback | Select when tighter VZ tolerance is required and thermal margin allows lower Ptot derating |
| MMSZ5245B-TP | ±5 % tolerance (23.75–25.25 V), SOD-123 package, 500 mW Ptot, not AEC-Q101 qualified | Limited to industrial/commercial use; lacks automotive qualification and thermal robustness | Acceptable for non-automotive prototypes or cost-sensitive consumer designs where AEC-Q101 is not mandated |
Compared with BZT52H-C24-QX, the BZT52H-B24-Q offers superior regulation accuracy at the expense of higher unit cost and slightly reduced surge immunity, while MMSZ5245B-TP provides footprint compatibility but sacrifices automotive reliability and thermal headroom.
Availability
BZT52H-C24-QX is available at Aetrix Electronics and suitable for automotive engine control units, ADAS camera modules, and electric power steering systems requiring stable component supply with full traceability and AEC-Q101 compliance.
Supply support for BZT52H-C24-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 mobile markets.
The BZT52H-Q series belongs to Nexperia's automotive-qualified Zener diode product line, engineered specifically for robust voltage reference and clamping in harsh-environment electronic control modules.
FAQ
What is the maximum continuous reverse current this Zener can handle at 25 °C ambient?
At Tamb = 25 °C with proper PCB thermal design (1 cm² cathode pad), BZT52H-C24-QX supports up to 34.6 mA continuous reverse current-calculated from Ptot = 830 mW and VZ = 24 V-before exceeding its power rating. Derating is required above 25 °C per the 150 °C Tj limit.
Does this part have a defined forward voltage specification?
Yes: forward voltage is specified as ≤ 0.9 V at IF = 10 mA (pulse test, tp ≤ 300 μs). This value reflects typical conduction behavior in forward bias and is relevant for polarity-check circuits or ESD protection configurations where anode-cathode orientation matters.
Can BZT52H-C24-QX be used in parallel for higher power handling?
No-Zener diodes exhibit negative temperature coefficients and manufacturing spread, causing current hogging when paralleled. Even matched units will thermally diverge, risking thermal runaway. For higher power, use a single higher-rated Zener or switch to an active shunt regulator IC.
How does the ±5 % tolerance affect circuit design margin in automotive applications?
The ±5 % tolerance (22.8–25.6 V) requires downstream circuitry-such as ADC reference dividers or comparator thresholds-to accommodate this 2.8 V span. Designers must verify worst-case operation at both extremes across temperature and lifetime, especially in safety-critical functions like overvoltage shutdown.
BZT52H-C24-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):
- 24.2 V
- Tolerance:
- ±5.79%
- 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-C24-QX FAQ
1.How can I place an order for BZT52H-C24-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52H-C24-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-C24-QX reliable?
The price and inventory of BZT52H-C24-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-C24-QX is usually 5 days.
3.What payment methods are accepted for BZT52H-C24-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52H-C24-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52H-C24-QX?
BZT52H-C24-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52H-C24-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-C24-QX?
For technical support, including BZT52H-C24-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52H-C24-QX requirements.
6.How does Aetrix verify that BZT52H-C24-QX is sourced from the original manufacturer or authorized distributors?
All BZT52H-C24-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-C24-QX meets industry standards.
7.What is the process for return or replacement of BZT52H-C24-QX?
All BZT52H-C24-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZT52H-C24-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-C24-QX part is unused and in its original packaging.
Return procedure for BZT52H-C24-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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