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Nexperia USA Inc. BZT52H-B47-QX
- Part No.:
- BZT52H-B47-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52H-B47-QX.pdf
- Description:
- DIODE ZENER 47V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:3,586
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Product details
Overview
BZT52H-B47-QX from Nexperia is a ±2 % tolerance Zener diode in SOD123F package, rated for 47 V nominal breakdown voltage at IZ = 2 mA, 830 mW total power dissipation, and qualified to AEC-Q101 for automotive voltage regulation and reference applications.
For engineers reviewing the BZT52H-B47-QX datasheet, BZT52H-B47-QX pinout, BZT52H-B47-QX application, or BZT52H-B47-QX equivalent, this device serves as a precision shunt voltage reference in power supply feedback loops, overvoltage protection circuits, and ECU biasing networks where stable 47 V regulation under transient load conditions is required.
Technical Context
This Zener diode operates in reverse-bias breakdown mode with a specified VZ = 46.1 V to 47.9 V at IZ = 2 mA and exhibits a temperature coefficient of +0.05 mV/K, ensuring minimal drift across automotive ambient ranges (−65 °C to +150 °C). Its differential resistance is ≤325 Ω, supporting stable regulation under varying current loads.
The device uses a planar silicon junction structure housed in an SOD123F package with 1.2 mm height and 3.5 mm length, optimized for reflow soldering on FR4 PCBs with single-sided copper and tin plating. Thermal resistance from junction to solder point is 70 K/W, enabling reliable operation at Tj up to 150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VZ | 46.1 V to 47.9 V at IZ = 2 mA - defines precise clamping threshold for 47 V reference design |
| Tolerance | ±2 % - enables tighter output voltage control than ±5 % variants in feedback networks |
| Total Power Dissipation Ptot | 830 mW at Tamb ≤ 25 °C - supports continuous regulation in compact automotive PCB layouts |
| Differential Resistance rdif | ≤325 Ω - ensures low dynamic impedance for stable voltage under load transients |
| Reverse Current IR | ≤90 μA at VR = 37.6 V - guarantees low leakage in high-impedance sensing paths |
| Thermal Resistance Rth(j-sp) | 70 K/W - allows direct thermal coupling to cathode pad for effective heat extraction |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling and HTRB |
Pinout & Package
SOD123F surface-mount plastic package: 2-terminal, flat lead, 3.5 mm × 1.7 mm footprint, 1.2 mm height, 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 for correct PCB orientation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; forms reverse-biased junction for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive use including HTSL, TC, and HTRB testing per Rev. G |
| ±2 % voltage tolerance | Enables tighter closed-loop regulation in 47 V DC-DC converter feedback without trimming |
| 830 mW power rating | Supports sustained 17.7 mA Zener current at 47 V, sufficient for sensor biasing and reference buffering |
| SOD123F package | Compatible with standard reflow profiles and automated placement; 0.55 mm lead pitch eases routing density |
| Low temperature coefficient | +0.05 mV/K minimizes VZ drift over −40 °C to +125 °C ambient range in engine control units |
Applications
| Engine Control Unit (ECU) Reference | Automotive Infotainment Power Rail Clamp |
|---|---|
|
Use Scenario: Provides stable 47 V reference for ADC biasing and microcontroller reset circuitry in gasoline/diesel ECUs. IC Role / Device Role / Timing Role: Shunt voltage reference regulating feedback node of LDOs supplying 5 V/3.3 V logic rails. Use Value: ±2 % tolerance and AEC-Q101 qualification ensure consistent reset thresholds across temperature and lifetime. |
Use Scenario: Clamps transient spikes on 48 V auxiliary power bus feeding head unit processors and display drivers. IC Role / Device Role / Timing Role: Overvoltage protection element absorbing surge energy during load dump events. Use Value: 47 V breakdown with 40 W non-repetitive peak power dissipation handles ISO 7637-2 Pulse 5a surges. |
| ADAS Camera Module Bias Supply | Electric Power Steering (EPS) Sensor Excitation |
|
Use Scenario: Supplies regulated bias voltage to CMOS image sensor analog front-end in surround-view cameras. IC Role / Device Role / Timing Role: Precision voltage reference stabilizing pixel gain and black-level calibration circuits. Use Value: Low 325 Ω differential resistance maintains <10 mV regulation error under 1–5 mA sensor current variation. |
Use Scenario: Generates stable excitation voltage for torque and position sensors in EPS motor control modules. IC Role / Device Role / Timing Role: Shunt regulator establishing reference for Wheatstone bridge instrumentation amplifiers. Use Value: +0.05 mV/K temperature coefficient limits sensor offset drift to <0.5 mV over −40 °C to +135 °C junction range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZT52H-C47-Q | ±5 % tolerance (44.0 V–50.0 V), higher max IR (90 μA vs. same), identical package and Ptot | Acceptable where 47 V accuracy is secondary to cost; less suitable for precision feedback loops | Select when budget constraints outweigh regulation tightness requirements in non-critical biasing |
| MMSZ5270B-TP | ±5 % tolerance (44.65 V–49.35 V), SOD-123 package, 500 mW Ptot, not AEC-Q101 qualified | Limited to industrial/commercial use; insufficient power and qualification for automotive ECU deployment | Use only in non-automotive systems where 47 V reference stability and 830 mW capability are not required |
Compared with BZT52H-B47-QX, the ±2 % BZT52H-C47-Q offers looser regulation but same ruggedness, while MMSZ5270B-TP lacks both automotive qualification and power handling-making the original the sole choice for AEC-compliant 47 V reference designs demanding accuracy and thermal margin.
Availability
BZT52H-B47-QX is available at Aetrix Electronics and suitable for automotive ECU design, ADAS camera biasing, electric power steering sensor excitation, and infotainment power rail clamping requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZT52H-B47-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 efficiency-driven solutions for automotive, industrial, and consumer markets, with leadership in discrete, logic, and MOSFET technologies.
The BZT52H-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for automotive voltage reference and overvoltage protection functions where reliability, tight tolerance, and thermal robustness are mandatory.
FAQ
What is the maximum Zener test current for BZT52H-B47-QX?
The datasheet specifies VZ measurement at IZ = 2 mA, with absolute maximum non-repetitive peak reverse current IZSM = 0.5 A for 100 μs pulses. Continuous operation must remain within the 830 mW power limit, corresponding to ~17.7 mA at 47 V under ideal thermal conditions.
Does BZT52H-B47-QX support reflow soldering only?
Yes - the official Nexperia documentation states reflow soldering is the only recommended method. The SOD123F package is not qualified for wave or hand soldering due to thermal stress risks; IPC/JEDEC J-STD-020D-compliant reflow profiles must be used with peak temperatures ≤260 °C.
How does the ±2 % tolerance affect regulation accuracy in a 47 V feedback loop?
At 47 V nominal, ±2 % tolerance means actual VZ falls between 46.1 V and 47.9 V. In a typical feedback divider, this introduces ≤±0.4 % output voltage error before compensation - acceptable for most automotive 48 V subsystems where downstream LDOs provide final regulation.
Is thermal resistance to ambient (Rth(j-a)) usable for board-level thermal design?
No - the 330 K/W Rth(j-a) value assumes free-air conditions and is not representative of real PCB mounting. For thermal design, use Rth(j-sp) = 70 K/W (junction-to-solder-point) with verified 1 cm² cathode pad copper area, as specified for worst-case derating calculations.
BZT52H-B47-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZT52H-Q
- Package/Case:
- SOD-123F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 47 V
- Tolerance:
- ±1.91%
- Power - Max:
- 375 mW
- Impedance (Max) (Zzt):
- 90 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123F
BZT52H-B47-QX FAQ
1.How can I place an order for BZT52H-B47-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52H-B47-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 BZT52H-B47-QX reliable?
The price and inventory of BZT52H-B47-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52H-B47-QX is usually 5 days.
3.What payment methods are accepted for BZT52H-B47-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52H-B47-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52H-B47-QX?
BZT52H-B47-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52H-B47-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 BZT52H-B47-QX?
For technical support, including BZT52H-B47-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52H-B47-QX requirements.
6.How does Aetrix verify that BZT52H-B47-QX is sourced from the original manufacturer or authorized distributors?
All BZT52H-B47-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 BZT52H-B47-QX meets industry standards.
7.What is the process for return or replacement of BZT52H-B47-QX?
All BZT52H-B47-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZT52H-B47-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 BZT52H-B47-QX part is unused and in its original packaging.
Return procedure for BZT52H-B47-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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