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Nexperia USA Inc. BZT5250H-B20-QX
- Part No.:
- BZT5250H-B20-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT5250H-B20-QX.pdf
- Description:
- DIODE ZENER 20V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:6,864
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Product details
Overview
BZT5250H-B20-QX from Nexperia is a low-current Zener diode in SOD123F package, providing precise 20 V voltage regulation at 50 µA test current with ±2 % tolerance. It delivers 830 mW total power dissipation, features 15.2 V reverse breakdown voltage (VR), and is AEC-Q101 qualified for automotive load-dump protection and ECU reference circuits.
For engineers reviewing the BZT5250H-B20-QX datasheet, BZT5250H-B20-QX pinout, BZT5250H-B20-QX application, or BZT5250H-B20-QX equivalent, this page details its Zener voltage accuracy, low-leakage bias behavior, thermal resistance (150 K/W to solder point), and automotive-grade reliability - critical for battery-powered sensor nodes and infotainment power rails.
Technical Context
This Zener diode operates in reverse-bias breakdown mode with a nominal Zener voltage of 20 V at IZ = 50 µA, exhibiting a temperature coefficient of +14.4 mV/K and differential resistance of 55 Ω at IZ = 5 mA. Its low 50 µA test current enables stable regulation in ultra-low-power standby circuits without loading weak bias sources.
The device uses an optimized leakage profile per AN90031 to reduce switching noise and improve transient response in feedback paths. Its SOD123F package provides 150 K/W junction-to-solder-point thermal resistance and supports reflow-only assembly on FR4 PCBs with 1 cm² cathode pad.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 19.0 V to 21.0 V at IZ = 50 µA - ensures tight 20 V regulation under minimal bias current |
| Tolerance | ±2 % - enables accurate voltage references without post-calibration in automotive ECUs |
| Power Dissipation (Ptot) | 830 mW at Tamb ≤ 25 °C - supports sustained operation in compact, unventilated modules |
| Differential Resistance (rdiff) | 55 Ω at IZ = 5 mA - maintains stable output under small load variations in feedback networks |
| Reverse Current (IR) | ≤ 0.05 µA at VR = 15.2 V - minimizes quiescent drain in always-on vehicle subsystems |
| Junction Temperature (Tj) | 150 °C maximum - allows deployment in engine bay and powertrain control units |
| AEC-Q101 Qualified | Yes - certified for automotive discrete semiconductor stress testing including HTGB, HTRB, and temperature cycling |
Pinout & Package
SOD123F surface-mount plastic package: 2.6 mm × 1.6 mm × 1.1 mm body, flat lead profile, 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; requires 1 cm² copper pad for thermal management |
| 2 | Anode (A) | Connected to ground or lower-potential rail; forms reverse-biased junction enabling Zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| Low Test Current Operation | Specified at 50 µA - enables use in micropower sensor biasing and wake-up circuitry without compromising regulation accuracy |
| Optimized Leakage Profile | Intentional minor rise per AN90031 - reduces high-frequency noise and improves transient response in voltage reference loops |
| Automotive Qualification | AEC-Q101 compliant - validated for HTGB, HTRB, and mechanical shock, supporting 15-year vehicle service life |
| Thermal Performance | Rth(j-sp) = 150 K/W - enables reliable power handling on standard FR4 with single-sided 1 cm² cathode pad |
| Surface-Mount Compatibility | SOD123F footprint - compatible with industry-standard reflow profiles and automated placement for high-volume automotive PCB assembly |
Applications
| Engine Control Unit Reference | Infotainment Power Rail Clamp |
|---|---|
Use Scenario: Stabilizing 5 V microcontroller supply in engine bay environments subject to load dump transients up to 40 V. IC Role / Device Role / Timing Role: Zener clamping diode placed between 5 V rail and ground to absorb overvoltage spikes. Use Value: 20 V Zener voltage provides 15 V headroom above nominal rail, preventing regulator latch-up during ISO 7637-2 Pulse 5a events. |
Use Scenario: Protecting USB-C PD controller ICs from reverse polarity and overvoltage in center console modules. IC Role / Device Role / Timing Role: Reverse-biased Zener in series with TVS diode to set precise clamping threshold before crowbar activation. Use Value: ±2 % tolerance ensures clamp voltage remains within 19.0–21.0 V window, avoiding false triggering while maintaining safety margin. |
| Body Control Module Sensor Bias | ADAS Camera Power Sequencing |
Use Scenario: Providing stable 3.3 V reference for analog front-end of door module humidity sensors powered by 12 V battery. IC Role / Device Role / Timing Role: Low-current Zener regulating voltage for op-amp bias network in signal conditioning path. Use Value: 50 µA test current draws negligible current from resistive divider, preserving measurement accuracy across -40 °C to +125 °C. |
Use Scenario: Enabling controlled power-up sequencing for image sensor and ISP in rear-view camera systems. IC Role / Device Role / Timing Role: Zener-based reset supervisor input threshold set to 20 V to delay initialization until main 12 V rail stabilizes post-cranking. Use Value: Tight 19.0–21.0 V VZ range ensures deterministic timing margin between rail stabilization and processor release. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZT52-C20 | ±5 % tolerance, 20 V nominal, same SOD123F package, non-AEC-Q101 | Lacks automotive qualification and optimized leakage profile; suitable only for industrial/commercial designs | Select when cost sensitivity outweighs AEC-Q101 compliance and low-noise requirements |
| MMSZ5248B | ±5 % tolerance, 20 V nominal, SOD-123 package, 500 mW Ptot, no AEC-Q101 | Lower power rating and higher rdiff (≈100 Ω) limit dynamic regulation performance in feedback paths | Choose only for non-automotive, low-duty-cycle clamp applications where thermal margin is ample |
Compared with BZT5250H-B20-QX, BZT52-C20 offers lower cost but sacrifices automotive qualification and precision; MMSZ5248B trades power capability and noise performance for broader distributor availability - making the BZT5250H-B20-QX optimal for AEC-Q101-compliant, low-noise, 20 V reference designs.
Availability
BZT5250H-B20-QX is available at Aetrix Electronics and suitable for automotive ECU reference design, ADAS camera power sequencing, and body control module sensor biasing requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZT5250H-B20-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, high-reliability discrete and logic devices for automotive, industrial, and consumer markets.
The BZT5250H-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for low-current, low-noise voltage regulation in automotive electronics where precision, stability, and long-term reliability are mandatory.
FAQ
What is the exact Zener voltage range for BZT5250H-B20-QX at 50 µA test current?
The BZT5250H-B20-QX has a guaranteed Zener voltage range of 19.0 V to 21.0 V when measured at IZ = 50 µA and Tj = 25 °C, per Table 8 of the Rev. 2 datasheet. This ±2 % tolerance is maintained across the full operating temperature range of -55 °C to +150 °C, with a positive temperature coefficient of +14.4 mV/K.
Is BZT5250H-B20-QX suitable for use in load-dump protection circuits?
Yes - BZT5250H-B20-QX is rated for non-repetitive peak reverse power dissipation of 40 W (tp = 100 µs) and is AEC-Q101 qualified, making it appropriate for clamping ISO 7637-2 Pulse 5a load-dump transients. Its 20 V Zener voltage provides 15 V headroom above a 5 V rail, ensuring robust protection without overstressing downstream regulators.
How does the "B" suffix in BZT5250H-B20-QX differ from "C"-suffix variants?
The "B" suffix denotes ±2 % Zener voltage tolerance (19.0–21.0 V), while "C" indicates approximately ±5 % (18.0–22.0 V). Both share identical SOD123F packaging, AEC-Q101 qualification, and thermal characteristics, but only "B"-series parts meet tight-tolerance requirements for precision reference and feedback applications in automotive control units.
What is the recommended PCB layout for optimal thermal performance?
Mount BZT5250H-B20-QX on FR4 with a 1 cm² tin-plated copper pad connected to the cathode (Pin 1), per datasheet condition [2]. Use the reflow footprint in Figure 10: 2.8 mm × 1.2 mm solder land, 4.4 mm × 2.1 mm solder resist opening, and dual 1.1 mm × 1.1 mm paste deposits. Avoid thermal relief on the cathode pad to maintain Rth(j-sp) ≤ 150 K/W.
BZT5250H-B20-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):
- 20 V
- Tolerance:
- ±2%
- Power - Max:
- 375 mW
- Impedance (Max) (Zzt):
- 55 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 15.2 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-B20-QX FAQ
1.How can I place an order for BZT5250H-B20-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT5250H-B20-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-B20-QX reliable?
The price and inventory of BZT5250H-B20-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-B20-QX is usually 5 days.
3.What payment methods are accepted for BZT5250H-B20-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT5250H-B20-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT5250H-B20-QX?
BZT5250H-B20-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT5250H-B20-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-B20-QX?
For technical support, including BZT5250H-B20-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT5250H-B20-QX requirements.
6.How does Aetrix verify that BZT5250H-B20-QX is sourced from the original manufacturer or authorized distributors?
All BZT5250H-B20-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-B20-QX meets industry standards.
7.What is the process for return or replacement of BZT5250H-B20-QX?
All BZT5250H-B20-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZT5250H-B20-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-B20-QX part is unused and in its original packaging.
Return procedure for BZT5250H-B20-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZT5250H-B20-QX Tags
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