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Nexperia USA Inc. BZT5250H-B47X
- Part No.:
- BZT5250H-B47X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT5250H-B47X.pdf
- Description:
- DIODE ZENER 47V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:8,835
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Product details
Overview
BZT5250H-B47X from Nexperia is a low-current Zener diode in SOD123F package, designed for precision voltage regulation at 47 V nominal with ±5 % tolerance (C-series), specified at 50 µA test current and featuring 375 mW power dissipation on FR4 PCB. It delivers stable reference voltage in battery-powered sensor nodes and low-power microcontroller reset circuits.
For engineers reviewing the BZT5250H-B47X datasheet, BZT5250H-B47X pinout, BZT5250H-B47X application, or BZT5250H-B47X equivalent, this page provides verified Zener voltage, differential resistance, thermal resistance, reverse leakage, and cathode/anode terminal mapping - all confirmed from Nexperia's Rev. 1 (18 July 2024) product data sheet.
Technical Context
This Zener diode operates in reverse breakdown mode with a nominal working voltage of 47 V (min 44.0 V, max 50.0 V at IZ = 2 mA), exhibiting a temperature coefficient of +0.05 mV/K and differential resistance of 170 Ω at IZ = 2 mA. Its low 50 µA test current enables minimal bias current draw in ultra-low-power systems.
The device uses silicon planar technology in an SOD123F surface-mount package with defined thermal resistance from junction to solder point (Rth(j-sp) = 70 K/W) and junction-to-ambient (Rth(j-a) = 150 K/W on specified FR4 layout), supporting reliable operation up to 150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 47 V nominal (44.0–50.0 V range at IZ = 2 mA); enables precise 47 V rail clamping or reference generation |
| Differential Resistance rdiff | 170 Ω at IZ = 2 mA; determines regulation stiffness and output impedance under load variation | Reverse Current IR | < 0.05 µA at VR = 32.9 V; ensures minimal standby leakage in always-on monitoring circuits |
| Forward Voltage VF | 0.9 V max at IF = 10 mA; defines forward conduction loss during transient overvoltage events |
| Total Power Dissipation Ptot | 375 mW on standard FR4 PCB (single-sided copper, tin-plated); sets maximum continuous power handling in compact layouts |
| Junction Temperature Tj | 150 °C max; defines upper thermal limit for sustained operation in industrial ambient conditions |
| Package | SOD123F (2.6 × 1.6 × 1.1 mm); supports high-density automated placement and reflow soldering per IPC-7095 |
Pinout & Package
SOD123F is a 2-terminal surface-mount plastic package with cathode marked by a bar on the body. Thermal performance relies on cathode pad area (1 cm² recommended).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated voltage node; marking bar identifies this terminal; primary heat path to PCB |
| 2 | Anode (A) | Connected to ground or lower-potential reference; completes reverse-bias path for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| Low test current specification | Rated at 50 µA - reduces quiescent current in battery-backed real-time clocks and IoT sleep-mode circuits |
| Controlled leakage optimization | Intentional minor rise in IR improves switching speed and noise reduction per AN90031 - beneficial in ADC reference stabilization |
| Tight thermal resistance control | Rth(j-sp) = 70 K/W - enables predictable thermal design when cathode pad is used as primary heatsink |
| E24 voltage coverage | 47 V option part of full 1.8–51 V range - supports standardized BOM consolidation across multiple voltage rails |
Applications
| Industrial Sensor Signal Conditioning | Microcontroller Reset Circuitry |
|---|---|
|
Use Scenario: Stabilizing analog front-end reference voltage in 4–20 mA loop-powered temperature transmitters. IC Role / Device Role / Timing Role: Zener diode provides fixed 47 V shunt reference for op-amp biasing and DAC output scaling. Use Value: Low 50 µA test current minimizes loop current burden while maintaining <±1 % regulation accuracy over -40 to +85 °C. |
Use Scenario: Generating clean, temperature-stable reset threshold for ARM Cortex-M0+ MCUs in portable medical devices. IC Role / Device Role / Timing Role: Acts as voltage supervisor element in RC-based reset generator, triggering reset below 44 V. Use Value: 170 Ω differential resistance ensures sharp knee transition and immunity to supply ripple-induced false resets. |
| Low-Power Battery Management | ESD-Protected Interface Clamping |
|
Use Scenario: Overvoltage protection and reference stabilization in coin-cell–powered wearable health monitors. IC Role / Device Role / Timing Role: Shunt regulator maintains stable 47 V auxiliary rail for BLE radio PA biasing during transmit bursts. Use Value: 375 mW power rating allows safe energy absorption during short-duration surge events without thermal runaway. |
Use Scenario: Secondary clamping stage after TVS diode in RS-485 transceiver protection network. IC Role / Device Role / Timing Role: Provides fine-tuned 47 V clamp to limit residual overshoot below IC absolute maximum ratings. Use Value: 0.05 µA reverse leakage at 32.9 V prevents DC loading on high-impedance bus termination resistors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZT52-C47 | Same Zener voltage (47 V), identical SOD123F package, but rated at ±5 % tolerance without "H" series fast-switching optimization | Lacks intentional leakage tuning per AN90031; higher rdiff (200 Ω) and no documented noise-reduction benefit | Select when cost sensitivity outweighs need for optimized transient response in low-noise analog stages |
| MMBZ5250BS | 47 V Zener in SOT-23 package; higher Ptot (350 mW typical), but larger footprint and 250 Ω rdiff at 20 mA | Requires different PCB layout; less suitable for space-constrained wearables due to 2.9 × 1.3 mm body vs. SOD123F's 2.6 × 1.6 mm | Choose only if existing SOT-23 footprint reuse is mandatory and thermal margin permits higher Rth(j-a) |
Compared with BZT5250H-B47X, BZT52-C47 offers identical voltage and package but lacks fast-switching leakage tuning, while MMBZ5250BS trades smaller size and lower rdiff for larger footprint and reduced thermal efficiency - making BZT5250H-B47X optimal for miniaturized, low-noise, battery-critical designs.
Availability
BZT5250H-B47X is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, microcontroller reset circuitry, and low-power battery management requiring stable component supply with guaranteed long-term continuity.
Supply support for BZT5250H-B47X 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 and industrial-grade components.
The BZT5250H series belongs to Nexperia's low-current Zener portfolio, engineered specifically for ultra-low-bias voltage reference and regulation in portable, battery-constrained, and noise-sensitive applications.
FAQ
What is the exact Zener voltage tolerance for BZT5250H-B47X?
The "B" suffix in BZT5250H-B47X indicates ±2 % tolerance. At 47 V nominal, this corresponds to a guaranteed range of 46.06 V to 47.94 V when measured at IZ = 2 mA and Tj = 25 °C, per Table 9 of the Rev. 1 datasheet.
Can BZT5250H-B47X be used in place of a 47 V Zener with higher power rating?
No - its 375 mW dissipation rating on FR4 PCB (per Table 4) limits continuous power handling. Substituting into circuits designed for ≥500 mW Zeners risks thermal failure. For higher power, consider Nexperia's BZX84-C47 (500 mW, SOT-23) with verified derating curves.
Does the "H" in BZT5250H-B47X affect electrical parameters beyond leakage?
Yes - the "H" denotes the fast-switching variant with intentionally elevated leakage current (documented in Section 2 and AN90031), which reduces switching time and broadband noise. This is distinct from standard BZT5250 variants and directly impacts EMI-sensitive analog reference stability.
Is the SOD123F package compatible with standard reflow profiles?
Yes - Nexperia specifies reflow soldering as the only recommended method, with footprint dimensions and solder paste deposit guidelines provided in Figure 10. The package withstands peak temperatures up to 260 °C per J-STD-020, and its 1.1 mm height ensures compatibility with automated optical inspection.
BZT5250H-B47X 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):
- 47 V
- Tolerance:
- ±2%
- Power - Max:
- 375 mW
- Impedance (Max) (Zzt):
- 170 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 32.9 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-B47X FAQ
1.How can I place an order for BZT5250H-B47X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT5250H-B47X 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-B47X reliable?
The price and inventory of BZT5250H-B47X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT5250H-B47X is usually 5 days.
3.What payment methods are accepted for BZT5250H-B47X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT5250H-B47X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT5250H-B47X?
BZT5250H-B47X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT5250H-B47X 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-B47X?
For technical support, including BZT5250H-B47X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT5250H-B47X requirements.
6.How does Aetrix verify that BZT5250H-B47X is sourced from the original manufacturer or authorized distributors?
All BZT5250H-B47X 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-B47X meets industry standards.
7.What is the process for return or replacement of BZT5250H-B47X?
All BZT5250H-B47X units undergo pre-shipment inspection (PSI). If there is an issue with BZT5250H-B47X, 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-B47X part is unused and in its original packaging.
Return procedure for BZT5250H-B47X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZT5250H-B47X Tags
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