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Nexperia USA Inc. BZT52H-A47X
- Part No.:
- BZT52H-A47X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52H-A47X.pdf
- Description:
- DIODE ZENER 47V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:4,277
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Product details
Overview
BZT52H-A47X from Nexperia is a precision Zener voltage regulator diode in SOD123F package, designed for stable 47 V reference and overvoltage clamping in low-power analog and power supply circuits. It delivers ±1 % tolerance at IZ = 5 mA, 32.9 Ω typical differential resistance, and 0.5 A non-repetitive peak reverse current - used in industrial sensor signal conditioning and DC-DC feedback loops.
For engineers reviewing the BZT52H-A47X datasheet, BZT52H-A47X pinout, BZT52H-A47X application, or BZT52H-A47X equivalent, this page provides verified electrical parameters, thermal performance data, cathode/anode terminal mapping, and validated alternatives for 47 V regulation in surface-mounted designs.
Technical Context
This Zener diode operates in reverse breakdown with tightly controlled VZ = 46.53 V to 47.47 V (±1 %) at 5 mA test current, exhibiting a temperature coefficient of +0.05 mV/K and 40 μA maximum reverse leakage at 37.6 V. Its low 32.9 Ω dynamic impedance ensures minimal output voltage drift under load variation.
Designed for SMD assembly on FR4 PCBs, it supports 830 mW total power dissipation at Tamb ≤ 25 °C with 70 K/W junction-to-solder-point thermal resistance. The SOD123F package enables compact placement while maintaining reliable thermal transfer via the cathode pad.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 46.53 V to 47.47 V at IZ = 5 mA - defines precise regulation point for feedback networks |
| Tolerance | ±1 % - enables high-accuracy voltage references without external trimming |
| Differential Resistance (rdif) | 32.9 Ω typical - limits output voltage change to <165 mV per 5 mA load shift |
| Reverse Leakage (IR) | ≤40 μA at VR = 37.6 V - ensures low standby power loss in always-on circuits |
| Power Dissipation (Ptot) | 830 mW at Tamb ≤ 25 °C - supports continuous operation in compact PCB layouts |
| Non-repetitive Peak Current (IZSM) | 0.5 A for tp = 100 μs - provides transient overvoltage protection in surge-prone inputs |
| Junction Temperature (Tj) | −65 °C to +150 °C - enables use in extended-temperature industrial environments |
Pinout & Package
SOD123F surface-mount plastic package: 2.5–2.7 mm length, 1.0–1.2 mm width, 0.70–0.55 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; reverse-biased configuration enables Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| High-precision voltage reference | ±1 % VZ tolerance enables direct replacement of trimmed references in feedback paths |
| Low dynamic impedance | 32.9 Ω typical rdif minimizes regulation error across 1–10 mA operating range |
| Robust thermal performance | 70 K/W Rth(j-sp) allows >600 mW sustained dissipation on standard 1 cm² cathode pad |
| Compact SMD footprint | SOD123F package occupies <2.7 mm × 1.2 mm area - ideal for space-constrained power rails |
| Wide ambient range | Operates from −65 °C to +150 °C - suitable for unheated outdoor enclosures and engine bay proximity |
Applications
| Industrial Sensor Signal Conditioning | DC-DC Converter Feedback Reference |
|---|---|
Use Scenario: Stabilizing analog output of pressure transducers exposed to 40–85 °C ambient swings. IC Role / Device Role / Timing Role: Zener diode provides fixed 47 V reference for op-amp gain-setting resistors and ADC input scaling. Use Value: ±1 % VZ tolerance and +0.05 mV/K TC ensure <0.3 % full-scale error across temperature without calibration. |
Use Scenario: Regulating isolated 48 V output of flyback converter powering PLC I/O modules. IC Role / Device Role / Timing Role: Connected between secondary-side optocoupler input and ground to clamp feedback voltage at 47 V. Use Value: 0.5 A IZSM absorbs 100 μs surges from transformer leakage, preventing optocoupler saturation during line transients. |
| Overvoltage Protection for MCU GPIO | Reference Voltage for Precision ADC |
Use Scenario: Protecting 3.3 V microcontroller pins against accidental 24 V field-wiring faults. IC Role / Device Role / Timing Role: Placed anode-to-GPIO, cathode-to-24 V rail to shunt fault current when voltage exceeds 47 V. Use Value: 830 mW Ptot sustains 17.5 mA fault current continuously, enabling fail-safe detection before system shutdown. |
Use Scenario: Generating stable reference for 16-bit SAR ADC measuring battery voltage in energy metering. IC Role / Device Role / Timing Role: Supplies 47 V reference to resistive divider that scales 0–100 V input to 0–4.7 V ADC range. Use Value: 32.9 Ω rdif limits reference droop to <0.165 V at 5 mA divider current, preserving 14-bit effective resolution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZT52H-B47X | ±2 % VZ tolerance (46.1 V–47.9 V), 42.0 Ω rdif, same SOD123F package | Acceptable where 47 V accuracy <±2 % suffices; higher rdif increases regulation error under load | Select for cost-sensitive designs where tighter tolerance is unnecessary and 0.5 A surge rating remains critical |
| MMSZ47ET1G | ±5 % VZ (44.65 V–49.35 V), 45 Ω rdif, SOD-123 package (mechanically identical but non-qualified for automotive) | Lower precision; not rated for industrial temp range (−65 °C to +150 °C) | Use only in commercial-grade applications with relaxed accuracy and temperature requirements |
Compared with BZT52H-A47X, the BZT52H-B47X trades 1 % tolerance for broader availability and lower cost, while MMSZ47ET1G sacrifices both precision and temperature capability for legacy design continuity - making the A47X optimal for new industrial systems demanding ±1 % stability across extreme ambient conditions.
Availability
BZT52H-A47X is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, DC-DC converter feedback reference, and overvoltage protection requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZT52H-A47X 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 logic, discrete, and MOSFET solutions for automotive, industrial, and consumer markets.
The BZT52H series belongs to Nexperia's general-purpose Zener diode product line, engineered specifically for precision voltage regulation and transient suppression in space-constrained, high-reliability surface-mount applications.
FAQ
What is the maximum continuous forward current for BZT52H-A47X?
The BZT52H-A47X is a Zener diode intended for reverse-bias operation; its forward conduction is incidental. The absolute maximum forward current is 250 mA per limiting values table, but forward voltage is only specified at 10 mA (≤0.9 V). Continuous forward bias is not recommended for regulation use.
Can BZT52H-A47X be used in place of a 47 V Zener with ±5 % tolerance?
Yes - the BZT52H-A47X meets all electrical and mechanical requirements of ±5 % 47 V Zeners while offering superior performance: ±1 % tolerance, lower 32.9 Ω dynamic resistance, and guaranteed 0.5 A surge rating. No layout or thermal redesign is needed due to identical SOD123F footprint and thermal characteristics.
How does the temperature coefficient affect regulation accuracy over −40 °C to +85 °C?
With a specified SZ of +0.05 mV/K, the BZT52H-A47X exhibits ~2.25 mV total VZ shift across 45 K ambient change - less than 0.005 % of 47 V. This negligible drift maintains regulation integrity without compensation circuitry in most industrial applications.
Is the SOD123F package compatible with standard reflow soldering profiles?
Yes - Nexperia specifies reflow soldering as the only recommended method for SOD123F. The package supports JEDEC J-STD-020D-compliant profiles, with peak temperatures up to 260 °C. Figure 12 provides exact solder land dimensions (2.9 mm × 1.6 mm per pad) and paste deposit guidelines for reliable assembly.
BZT52H-A47X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZT52H
- Package/Case:
- SOD-123F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 47 V
- Tolerance:
- ±1%
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123F
BZT52H-A47X FAQ
1.How can I place an order for BZT52H-A47X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52H-A47X 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-A47X reliable?
The price and inventory of BZT52H-A47X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52H-A47X is usually 5 days.
3.What payment methods are accepted for BZT52H-A47X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52H-A47X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52H-A47X?
BZT52H-A47X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52H-A47X 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-A47X?
For technical support, including BZT52H-A47X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52H-A47X requirements.
6.How does Aetrix verify that BZT52H-A47X is sourced from the original manufacturer or authorized distributors?
All BZT52H-A47X 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-A47X meets industry standards.
7.What is the process for return or replacement of BZT52H-A47X?
All BZT52H-A47X units undergo pre-shipment inspection (PSI). If there is an issue with BZT52H-A47X, 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-A47X part is unused and in its original packaging.
Return procedure for BZT52H-A47X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZT52H-A47X Tags
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