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Nexperia USA Inc. BZT5250H-C3V9-QX
- Part No.:
- BZT5250H-C3V9-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT5250H-C3V9-QX.pdf
- Description:
- DIODE ZENER 3.9V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:8,609
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Product details
Overview
BZT5250H-C3V9-QX from Nexperia is a low-current Zener diode in SOD123F package, designed for precision voltage regulation at 3.9 V nominal with ±5 % tolerance, specified at 50 µA test current, and rated for 830 mW total power dissipation; it is AEC-Q101 qualified and used in automotive body control modules for stable biasing of sensor interfaces.
For engineers reviewing the BZT5250H-C3V9-QX datasheet, BZT5250H-C3V9-QX pinout, BZT5250H-C3V9-QX application, or BZT5250H-C3V9-QX equivalent, this page delivers verified Zener voltage, thermal resistance, leakage behavior, cathode/anode polarity marking, and automotive-grade reliability data - all confirmed from Nexperia's Rev. 2 (18 July 2024) product data sheet.
Technical Context
This Zener diode operates in reverse breakdown mode with a nominal Zener voltage of 3.9 V at IZ = 50 µA, exhibiting a temperature coefficient of −2.7 mV/K and differential resistance of ≤95 Ω at IZ = 5 mA. Its low test current enables ultra-low quiescent current regulation in battery-backed circuits.
The device features intentional minor leakage optimization per AN90031 for fast switching and noise reduction, and achieves Rth(j-a) = 330 K/W on FR4 PCB with single-sided copper - critical for thermal design in space-constrained automotive PCBs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.70 V to 4.10 V at IZ = 50 µA - defines precise regulation window for low-power reference rails |
| Tolerance | ±5 % - matches standard E24 voltage series for cost-optimized BOM selection |
| Differential Resistance (rdiff) | ≤95 Ω at IZ = 5 mA - ensures minimal output impedance under light load conditions |
| Reverse Current (IR) | ≤2.0 µA at VR = 2.0 V - guarantees low standby power loss in always-on circuits |
| Total Power Dissipation (Ptot) | 830 mW at Tamb ≤ 25 °C on 1 cm² cathode pad - sets maximum continuous DC power handling |
| Junction Temperature (Tj) | −55 °C to +150 °C - supports operation across full automotive ambient range |
| AEC-Q101 Qualified | Yes - validated for automotive electronics per stress test qualification for discrete semiconductors |
Pinout & Package
SOD123F surface-mount plastic package: 2.6 mm × 1.6 mm × 1.1 mm body, flat lead, 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 - polarity must be observed to avoid forward conduction |
| 2 | Anode (A) | Connected to ground or lower-potential rail; reverse-biased configuration enables Zener breakdown regulation |
Key Features
| Feature | Design Value |
|---|---|
| Low-test-current specification | Rated at 50 µA - enables stable regulation in microamp-level bias networks without loading sensitive sources |
| Optimized leakage profile | Intentional minor rise per AN90031 - reduces switching noise and improves transient response in signal conditioning paths |
| Automotive qualification | AEC-Q101 compliant - validated for under-hood and cabin applications including lighting control and sensor signal conditioning |
| Thermal performance | Rth(j-sp) = 150 K/W to solder point - allows direct thermal coupling to PCB copper for improved power handling in compact layouts |
Applications
| Automotive Body Control Module | Portable Medical Sensor Bias |
|---|---|
Use Scenario: Regulating reference voltage for LIN bus transceiver biasing in door module ECUs. IC Role / Device Role / Timing Role: Zener diode provides stable 3.9 V rail to power internal LDO input stage and set threshold for wake-up detection circuitry. Use Value: ±5 % tolerance and −2.7 mV/K tempco ensure consistent wake-up sensitivity across −40 °C to +125 °C ambient. |
Use Scenario: Supplying precision bias to analog front-end of wearable ECG electrode amplifier. IC Role / Device Role / Timing Role: Acts as low-current shunt regulator for op-amp reference node, minimizing battery drain during multi-day monitoring. Use Value: 2.0 µA max reverse leakage at 2.0 V enables >5-year battery life in coin-cell-powered devices. |
| Industrial IoT Node Voltage Clamp | Smart Lighting Driver Feedback Reference |
Use Scenario: Clamping ADC input protection network in battery-operated environmental sensor node. IC Role / Device Role / Timing Role: Limits overvoltage transients to protect 3.3 V SAR ADC while maintaining low standby current. Use Value: 830 mW Ptot rating allows absorption of 100 µs surges up to 40 W without degradation. |
Use Scenario: Setting feedback threshold for constant-current LED driver in automotive interior lighting. IC Role / Device Role / Timing Role: Provides stable 3.9 V reference to current-sense comparator in PWM-controlled buck driver. Use Value: 95 Ω rdiff ensures <10 mV output shift across 0–100 µA load variation - critical for luminance consistency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C3V9 | Same 3.9 V nominal, ±5 %, but SOT23 package (higher Rth(j-a) = 400 K/W); no AEC-Q101 qualification | Not suitable for under-hood automotive use; limited to consumer/industrial PCBs with ample airflow | Select only if board space permits larger footprint and automotive qualification is unnecessary |
| MMSZ4685 | 3.9 V, ±5 %, SOD123 package (same outline but non-AEC-Q101 grade); rdiff = 120 Ω at 5 mA | Lacks intentional leakage optimization and automotive stress validation; higher dynamic impedance affects noise-sensitive references | Acceptable for cost-driven non-automotive designs where thermal margin exceeds 330 K/W |
Compared with BZT5250H-C3V9-QX, BZX84-C3V9 trades automotive reliability for wider distributor availability, while MMSZ4685 sacrifices thermal performance and noise optimization for lower unit cost - making the Nexperia part uniquely suited for AEC-Q101-compliant, low-noise, thermally constrained applications.
Availability
BZT5250H-C3V9-QX is available at Aetrix Electronics and suitable for automotive body control modules, portable medical sensor biasing, and industrial IoT voltage clamping requiring stable component supply, long-lifecycle assurance, and AEC-Q101 traceability.
Supply support for BZT5250H-C3V9-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 high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and energy-efficient solutions.
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 and portable electronics where precision, stability, and qualification integrity are mandatory.
FAQ
What is the exact Zener voltage range for BZT5250H-C3V9-QX at 50 µA test current?
The BZT5250H-C3V9-QX has a guaranteed Zener voltage range of 3.70 V to 4.10 V when measured at IZ = 50 µA and Tj = 25 °C, per Table 8 of the Nexperia Rev. 2 datasheet. This ±5 % tolerance aligns with the 'C' series designation and is validated across the full operating temperature range.
Does BZT5250H-C3V9-QX support reflow soldering only, or can it be hand-soldered?
Nexperia explicitly recommends reflow soldering only for the SOD123F package, as stated in Section 13 of the datasheet. Hand-soldering is not advised due to thermal stress risks - the package's small size and thermal mass require precise, controlled heating profiles to avoid delamination or junction damage.
How does the −2.7 mV/K temperature coefficient impact regulation accuracy over temperature?
At −2.7 mV/K, the Zener voltage decreases by 2.7 mV per Kelvin rise in junction temperature. Over a 100 K span (−40 °C to +60 °C), this yields a drift of approximately −270 mV - but since nominal VZ is 3.9 V, the relative error remains within ±7 %, which is acceptable for non-precision biasing in automotive systems.
Is the 830 mW power rating valid across the full ambient temperature range?
No - the 830 mW rating applies only at Tamb ≤ 25 °C with a 1 cm² cathode mounting pad on FR4 PCB. Derating is required above 25 °C: the datasheet specifies a linear derating slope based on Rth(j-a) = 330 K/W, reducing usable power by ~2.5 mW/°C above ambient.
BZT5250H-C3V9-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):
- 3.9 V
- Tolerance:
- ±5%
- Power - Max:
- 375 mW
- Impedance (Max) (Zzt):
- 95 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 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-C3V9-QX FAQ
1.How can I place an order for BZT5250H-C3V9-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT5250H-C3V9-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-C3V9-QX reliable?
The price and inventory of BZT5250H-C3V9-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-C3V9-QX is usually 5 days.
3.What payment methods are accepted for BZT5250H-C3V9-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT5250H-C3V9-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT5250H-C3V9-QX?
BZT5250H-C3V9-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT5250H-C3V9-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-C3V9-QX?
For technical support, including BZT5250H-C3V9-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT5250H-C3V9-QX requirements.
6.How does Aetrix verify that BZT5250H-C3V9-QX is sourced from the original manufacturer or authorized distributors?
All BZT5250H-C3V9-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-C3V9-QX meets industry standards.
7.What is the process for return or replacement of BZT5250H-C3V9-QX?
All BZT5250H-C3V9-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZT5250H-C3V9-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-C3V9-QX part is unused and in its original packaging.
Return procedure for BZT5250H-C3V9-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZT5250H-C3V9-QX Tags
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