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Nexperia USA Inc. BZT5250H-B12X
- Part No.:
- BZT5250H-B12X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT5250H-B12X.pdf
- Description:
- DIODE ZENER 12V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:3,244
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Product details
Overview
BZT5250H-B12X from Nexperia is a low-current Zener diode in SOD123F package, providing 12 V nominal regulation at 50 µA test current with ±2 % tolerance, 150 Ω differential resistance at 5 mA, and 9.1 V reverse breakdown voltage at 5 mA. It serves as a precision voltage reference or low-power bias regulator in portable battery-powered circuits.
For engineers reviewing the BZT5250H-B12X datasheet, BZT5250H-B12X pinout, BZT5250H-B12X application, or BZT5250H-B12X equivalent, key selection criteria include its low 50 µA test current, tight ±2 % tolerance, 150 Ω dynamic impedance at 5 mA, SOD123F footprint compatibility, and intentional leakage optimization for noise-sensitive analog references.
Technical Context
This Zener diode operates in reverse-biased breakdown mode with a nominal 12 V working voltage (B-series ±2 %), specified at IZ = 50 µA - enabling ultra-low quiescent current operation ideal for energy-constrained systems. Its differential resistance of 150 Ω at IZ = 5 mA ensures stable regulation under light load variation.
The device features an intentional minor rise in leakage current per AN90031 to reduce switching noise and improve transient response in signal conditioning paths. Thermal resistance from junction to solder point is 150 K/W, supporting reliable operation up to 150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 12 V ±2 % at IZ = 50 µA - enables precise low-current reference generation |
| Differential Resistance | 150 Ω at IZ = 5 mA - ensures minimal output voltage shift under small load changes |
| Forward Voltage | 0.9 V at IF = 10 mA - defines forward conduction threshold for polarity protection |
| Total Power Dissipation | 830 mW at Tamb ≤ 25 °C on 1 cm² cathode pad - sets maximum continuous DC power handling |
| Reverse Current | ≤ 0.05 µA at VR = 9.1 V - confirms sharp knee and low leakage below breakdown |
| Junction Temperature Range | –55 °C to +150 °C - supports industrial and extended-temperature embedded applications |
| Package | SOD123F (2.6 × 1.6 × 1.1 mm) - surface-mount footprint compatible with automated PCB assembly |
Pinout & Package
SOD123F is a 2-pin surface-mount plastic package with cathode marked by a bar on the body. The device uses standard FR4 PCB mounting with tin-plated copper; thermal performance depends on cathode pad area (1 cm² recommended for 830 mW rating).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal |
| 2 | Anode (A) | Connected to ground or lower-potential rail; reverse-bias polarity required for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - reduces standby power in battery-backed voltage references |
| Tight voltage tolerance | ±2 % (B-series) - eliminates need for post-production trimming in precision analog circuits |
| Optimized leakage profile | Intentional minor IR rise per AN90031 - suppresses high-frequency noise in sensor bias networks |
| Thermal robustness | Rth(j-sp) = 150 K/W - enables stable regulation without heatsinking in compact layouts |
| Surface-mount compatibility | SOD123F footprint - supports high-density PCB designs and reflow soldering per JEDEC standards |
Applications
| Portable Sensor Biasing | Low-Power Microcontroller Reference |
|---|---|
Use Scenario: Providing stable bias voltage to MEMS accelerometers and temperature sensors in wearables. IC Role / Device Role / Timing Role: Zener voltage reference supplying fixed 12 V to analog front-end circuitry. Use Value: 50 µA test current minimizes battery drain while ±2 % tolerance ensures measurement repeatability across units. |
Use Scenario: Generating clean 12 V supply for ADC reference inputs in coin-cell-powered IoT nodes. IC Role / Device Role / Timing Role: Low-noise shunt regulator stabilizing VREF rail during sleep-to-wake transitions. Use Value: Intentional leakage optimization per AN90031 reduces switching-induced noise coupling into sensitive analog domains. |
| Industrial Signal Conditioning | LED Driver Current Setting |
Use Scenario: Calibrating 4–20 mA transmitter loop voltage thresholds in factory automation modules. IC Role / Device Role / Timing Role: Precision shunt element establishing known voltage drop across sense resistor. Use Value: 150 Ω differential resistance maintains <10 mV error over ±1 mA load variation, ensuring loop accuracy. |
Use Scenario: Setting constant current for indicator LEDs in medical handheld devices. IC Role / Device Role / Timing Role: Zener-based current source reference in linear LED driver topology. Use Value: Stable 12 V regulation at low IZ allows predictable current mirror ratio without active feedback overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZT52-C12 | ±5 % tolerance, 170 Ω rdiff at 5 mA, same SOD123F package | Higher voltage drift and impedance - suitable only for non-critical biasing | Select when cost sensitivity outweighs regulation precision and noise performance |
| MMSZ5242B | ±5 % tolerance, 19 Ω rdiff at 20 mA, SOD-123 package (identical mechanical outline) | Requires higher test current (20 mA) - incompatible with ultra-low-power designs | Choose only if system can support ≥20 mA Zener current and prioritizes low impedance over quiescent power |
Compared with BZT5250H-B12X, BZT52-C12 trades precision for cost, while MMSZ5242B delivers lower impedance at the expense of 400× higher test current - making BZT5250H-B12X uniquely suited for sub-100 µA reference applications demanding both accuracy and low noise.
Availability
BZT5250H-B12X is available at Aetrix Electronics and suitable for portable sensor biasing, low-power microcontroller reference, and industrial signal conditioning requiring stable component supply with guaranteed long-term continuity.
Supply support for BZT5250H-B12X 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 delivering high-performance logic, discrete, and MOSFET solutions with emphasis on reliability, efficiency, and miniaturization for automotive, industrial, and consumer markets.
BZT5250H-B12X belongs to the BZT5250H series of low-current Zener diodes engineered specifically for precision voltage regulation in battery-powered and noise-sensitive analog systems.
FAQ
What is the maximum continuous power dissipation for BZT5250H-B12X at 70 °C ambient?
At Tamb = 70 °C, derated power is 581 mW, calculated using the 830 mW rating at 25 °C and thermal resistance Rth(j-a) = 330 K/W. This assumes standard FR4 PCB mounting with single-sided copper and tin plating per datasheet condition [2]. Operation above this limit risks thermal runaway.
Does BZT5250H-B12X support bidirectional ESD protection?
No. BZT5250H-B12X is a unidirectional Zener diode optimized for reverse-bias regulation only. Its forward voltage is 0.9 V at 10 mA, but it lacks symmetric clamping characteristics or specified ESD ratings. Use dedicated TVS diodes like PESD5V0S1BA for bidirectional protection.
Can BZT5250H-B12X replace BZX84-C12 in existing designs?
Not directly. BZX84-C12 uses SOT23 package (3-pin, different footprint), has ±5 % tolerance, and is rated at 300 mW. BZT5250H-B12X requires PCB layout revision for SOD123F, offers tighter tolerance and lower test current, but shares no pin compatibility or identical thermal behavior.
What is the temperature coefficient of BZT5250H-B12X near 25 °C?
The temperature coefficient is +6.0 mV/K, derived from Table 8's SZ column for B12 (11.80–12.20 V range). This positive coefficient means output voltage increases ~6 mV per °C rise in junction temperature - critical for temperature-stable reference design and compensation planning.
BZT5250H-B12X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZT5250H
- Package/Case:
- SOD-123F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 12 V
- Tolerance:
- ±2%
- Power - Max:
- 375 mW
- Impedance (Max) (Zzt):
- 25 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 9.1 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
BZT5250H-B12X FAQ
1.How can I place an order for BZT5250H-B12X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT5250H-B12X 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-B12X reliable?
The price and inventory of BZT5250H-B12X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT5250H-B12X is usually 5 days.
3.What payment methods are accepted for BZT5250H-B12X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT5250H-B12X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT5250H-B12X?
BZT5250H-B12X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT5250H-B12X 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-B12X?
For technical support, including BZT5250H-B12X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT5250H-B12X requirements.
6.How does Aetrix verify that BZT5250H-B12X is sourced from the original manufacturer or authorized distributors?
All BZT5250H-B12X 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-B12X meets industry standards.
7.What is the process for return or replacement of BZT5250H-B12X?
All BZT5250H-B12X units undergo pre-shipment inspection (PSI). If there is an issue with BZT5250H-B12X, 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-B12X part is unused and in its original packaging.
Return procedure for BZT5250H-B12X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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