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Nexperia USA Inc. BZT5250H-C39-QX
- Part No.:
- BZT5250H-C39-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT5250H-C39-QX.pdf
- Description:
- DIODE ZENER 39V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:9,171
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Product details
Overview
BZT5250H-C39-QX from Nexperia is a low-current Zener diode in SOD123F package, rated for 39 V nominal Zener voltage (±5 % tolerance), 50 µA test current, and 830 mW total power dissipation. It delivers stable voltage regulation in automotive-grade circuits where low bias current, fast switching, and noise reduction are critical - such as ECU reference rails and sensor biasing networks.
For engineers reviewing the BZT5250H-C39-QX datasheet, BZT5250H-C39-QX pinout, BZT5250H-C39-QX application, or BZT5250H-C39-QX equivalent, key selection criteria include its AEC-Q101 qualification, intentional leakage optimization for transient response, 39 V ±5 % regulation at 50 µA, SOD123F thermal performance (Rth(j-sp) = 150 K/W), and cathode-anode polarity marking per JEDEC standard.
Technical Context
This Zener diode operates with a specified reverse breakdown voltage of 37.05 V to 40.95 V at IZ = 50 µA, exhibiting a temperature coefficient of +0.05 mV/K and differential resistance ≤350 Ω at IZ = 2 mA. Its design targets low-quiescent-current regulation in battery-sensitive systems.
The device features intentionally elevated leakage current to improve switching speed and reduce high-frequency noise - a feature documented in Nexperia Application Note AN90031. It is qualified to AEC-Q101 and rated for ambient temperatures from −55 °C to +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 37.05 V to 40.95 V at IZ = 50 µA - defines precise regulation window for 39 V nominal rail |
| Tolerance | ±5 % - supports cost-optimized designs where tighter tolerance is not required |
| Test Current (IZ) | 50 µA - enables ultra-low-power biasing in portable and always-on automotive subsystems |
| Total Power Dissipation (Ptot) | 830 mW at Tamb ≤ 25 °C - sets maximum continuous DC power handling on standard FR4 PCB |
| Forward Voltage (VF) | ≤ 0.9 V at IF = 10 mA - ensures minimal forward conduction loss during transient clamping |
| Junction Temperature (Tj) | 150 °C maximum - defines thermal safety margin for under-hood automotive deployment |
| Thermal Resistance (Rth(j-sp)) | 150 K/W - quantifies heat transfer efficiency from junction to solder point on cathode pad |
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; carries reverse-bias current during regulation |
| 2 | Anode (A) | Connected to ground or lower-potential reference; completes Zener conduction path when reverse voltage exceeds VZ |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive under-hood use including engine control units and ADAS sensors |
| Optimized leakage current | Intentionally elevated IR improves switching speed and reduces broadband noise per AN90031 |
| Low-test-current specification | Rated at 50 µA - enables stable regulation in microamp-level bias networks without loading |
| SOD123F footprint compatibility | Standardized 2.6 mm × 1.6 mm land pattern supports automated reflow assembly and IPC-7351B compliance |
| Thermal performance | Rth(j-sp) = 150 K/W allows >500 mW derated power at 85 °C ambient on typical PCB layout |
Applications
| Automotive ECU Reference Rail | Portable Sensor Biasing |
|---|---|
Use Scenario: Providing stable 39 V reference for analog front-end circuitry in engine control modules. IC Role / Device Role / Timing Role: Zener regulator supplying precision bias to op-amps and ADC references. Use Value: Maintains ±5 % regulation across −40 °C to +125 °C while drawing only 50 µA, minimizing ECU standby power. |
Use Scenario: Biasing MEMS pressure sensors in tire pressure monitoring systems (TPMS). IC Role / Device Role / Timing Role: Low-current voltage clamp ensuring consistent sensor excitation voltage from coin-cell sources. Use Value: Enables 10-year battery life via 50 µA test current and <1 µA leakage at 35 V, verified per AEC-Q101 stress profiles. |
| Industrial CAN Transceiver Protection | Smart Lighting LED Driver Feedback |
Use Scenario: Clamping transceiver VCC rail against load-dump transients in 12 V vehicle networks. IC Role / Device Role / Timing Role: Fast-switching Zener absorbing surge energy before it reaches CAN PHY ICs. Use Value: Intentional leakage optimization reduces ringing during 100 ns–1 µs transients, improving EMC robustness. |
Use Scenario: Setting feedback threshold in constant-current LED drivers for automotive interior lighting. IC Role / Device Role / Timing Role: Precision shunt reference defining current-sense comparator trip point. Use Value: 39 V ±5 % tolerance and <350 Ω dynamic impedance ensure ±2 % LED current accuracy over temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZT5250H-B39-Q | ±2 % tolerance (38.2 V–39.8 V), lower leakage, no intentional leakage optimization | Better for precision reference; unsuitable where fast switching/noise reduction is prioritized | Select when tighter voltage tolerance outweighs transient performance needs |
| MMSZ5250B-TP | Same 39 V nominal, ±5 %, but SOD-123 package (not SOD123F); Rth(j-a) = 330 K/W vs 150 K/W | Lower thermal performance limits continuous power to 375 mW at 25 °C ambient | Choose only if legacy SOD-123 footprint compatibility is mandatory and power dissipation is <300 mW |
Compared with BZT5250H-C39-QX, the BZT5250H-B39-Q offers tighter tolerance but lacks optimized leakage for noise-sensitive switching, while MMSZ5250B-TP sacrifices thermal capability and automotive qualification for generic industrial use.
Availability
BZT5250H-C39-QX is available at Aetrix Electronics and suitable for automotive ECU design, battery-powered sensor modules, and industrial CAN network protection requiring stable component supply with AEC-Q101 assurance.
Supply support for BZT5250H-C39-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 BZT5250H-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode product line, engineered specifically for low-current, noise-critical automotive voltage regulation and transient suppression.
FAQ
What is the Zener voltage tolerance and test condition for BZT5250H-C39-QX?
The BZT5250H-C39-QX has a ±5 % tolerance, meaning its Zener voltage ranges from 37.05 V to 40.95 V when measured at a test current of 50 µA and junction temperature of 25 °C. This low-current rating makes it suitable for ultra-low-power biasing applications where traditional 5 mA Zener tests would overload the source.
How does the "intentional minor rise of leakage current" benefit circuit performance?
This design feature - detailed in Nexperia Application Note AN90031 - increases reverse leakage slightly to reduce minority-carrier storage time, thereby improving switching speed and suppressing high-frequency oscillation during transient events. It directly enhances noise immunity in CAN bus interfaces and sensor signal chains without compromising long-term reliability.
Is BZT5250H-C39-QX compatible with standard SOD123 reflow footprints?
No - BZT5250H-C39-QX uses the SOD123F package, which has a flatter lead profile and tighter dimensional tolerances than legacy SOD-123. Its recommended reflow footprint specifies 1.2 mm × 1.1 mm solder lands (2×) with 1.6 mm center-to-center spacing. Using a standard SOD-123 footprint may cause tombstoning or insufficient thermal pad contact.
Can BZT5250H-C39-QX be used in non-automotive applications?
Yes - while AEC-Q101 qualified and optimized for automotive environments, its 39 V regulation, 50 µA test current, and SOD123F package make it equally suitable for industrial IoT sensor nodes, medical wearable bias rails, and telecom backup power supervisors where low quiescent current and thermal robustness are valued.
BZT5250H-C39-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):
- 39 V
- Tolerance:
- ±5%
- Power - Max:
- 375 mW
- Impedance (Max) (Zzt):
- 130 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 29.6 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-C39-QX FAQ
1.How can I place an order for BZT5250H-C39-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT5250H-C39-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-C39-QX reliable?
The price and inventory of BZT5250H-C39-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-C39-QX is usually 5 days.
3.What payment methods are accepted for BZT5250H-C39-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT5250H-C39-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT5250H-C39-QX?
BZT5250H-C39-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT5250H-C39-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-C39-QX?
For technical support, including BZT5250H-C39-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT5250H-C39-QX requirements.
6.How does Aetrix verify that BZT5250H-C39-QX is sourced from the original manufacturer or authorized distributors?
All BZT5250H-C39-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-C39-QX meets industry standards.
7.What is the process for return or replacement of BZT5250H-C39-QX?
All BZT5250H-C39-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZT5250H-C39-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-C39-QX part is unused and in its original packaging.
Return procedure for BZT5250H-C39-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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