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Nexperia USA Inc. BZT52H-C47-QX
- Part No.:
- BZT52H-C47-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52H-C47-QX.pdf
- Description:
- DIODE ZENER 47V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:4,003
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Product details
Overview
BZT52H-C47-QX from Nexperia is a ±5 % tolerance Zener diode in SOD123F package, rated for 47 V nominal breakdown voltage at IZ = 2 mA, with 830 mW total power dissipation and AEC-Q101 qualification for automotive voltage regulation. It provides stable reference voltage in low-power biasing, overvoltage clamping, and supply rail stabilization circuits.
For engineers reviewing the BZT52H-C47-QX datasheet, BZT52H-C47-QX pinout, BZT52H-C47-QX application, or BZT52H-C47-QX equivalent, key selection factors include its 47 V Zener voltage tolerance, thermal resistance (Rth(j-sp) = 150 K/W), non-repetitive peak reverse current (0.5 A), differential resistance (325 Ω), and automotive-grade reliability under ambient temperatures from −65 °C to +150 °C.
Technical Context
This Zener diode operates in reverse-bias breakdown mode to maintain a stable 47 V reference across its terminals under regulated current conditions. Its ±5 % tolerance band and 325 Ω differential resistance define precision limits for voltage reference stability in low-current applications.
Designed for surface-mount use on FR4 PCBs with single-sided copper, it delivers 830 mW power handling at Tamb ≤ 25 °C and supports transient surge immunity up to 40 W (100 μs pulse) while maintaining junction temperature below 150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 44.0 V to 50.0 V at IZ = 2 mA - defines usable regulation window for 47 V nominal reference |
| Differential Resistance (rdif) | 325 Ω max - determines output impedance and voltage deviation under load current changes |
| Reverse Current (IR) | 90 μA max at VR = 37.6 V - specifies leakage level before breakdown onset |
| Total Power Dissipation (Ptot) | 830 mW at Tamb ≤ 25 °C - sets maximum continuous DC power in standard PCB mounting |
| Thermal Resistance (Rth(j-sp)) | 150 K/W - quantifies junction-to-solder-point heat transfer efficiency for thermal design |
| Non-repetitive Peak Reverse Current (IZSM) | 0.5 A at tp = 100 μs - indicates surge current capability for transient suppression |
| Junction Temperature (Tj) | −65 °C to +150 °C - defines operational and storage temperature envelope for automotive environments |
Pinout & Package
The BZT52H-C47-QX is housed in an SOD123F surface-mount plastic package (3.6 mm × 2.7 mm × 1.2 mm) with flat leads optimized for reflow soldering on FR4 PCBs. Cathode is marked by a bar on the device body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; polarity marker determines forward/reverse bias orientation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-bias path for Zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive electronics per stress test requirements, enabling use in engine control, lighting, and infotainment systems |
| ±5 % Zener voltage tolerance | Supports cost-sensitive designs where tighter tolerances are unnecessary, balancing precision and unit cost |
| SOD123F package footprint | Enables high-density PCB layouts with standardized reflow-compatible land pattern (2.9 mm × 1.6 mm occupied area) |
| 830 mW power rating | Allows stable operation at up to 17.7 mA average Zener current (47 V × 17.7 mA ≈ 830 mW) in ambient-limited conditions |
| 150 °C max junction temperature | Permits deployment in under-hood environments with minimal derating when mounted per specified pad layout |
Applications
| Automotive ECU Power Rail Clamping | Industrial Sensor Bias Reference |
|---|---|
Use Scenario: Protects microcontroller supply inputs against load-dump transients in 12 V automotive subsystems. IC Role / Device Role / Timing Role: Zener clamp placed between VCC and GND to shunt excess energy above 47 V threshold. Use Value: Limits voltage excursion to ≤50 V during ISO 7637-2 Pulse 5a events, preventing MCU latch-up or damage. |
Use Scenario: Provides stable excitation voltage for bridge-based pressure sensors in factory automation equipment. IC Role / Device Role / Timing Role: Passive voltage reference source for Wheatstone bridge biasing network. Use Value: Maintains <±0.5 % output drift over −40 °C to +85 °C due to low temperature coefficient (0.05 mV/K) and low IR leakage. |
| Consumer Power Adapter Feedback | Telecom Line Interface Protection |
Use Scenario: Sets secondary-side feedback threshold in isolated flyback converters for USB-C PD adapters. IC Role / Device Role / Timing Role: Zener element in optocoupler feedback loop to regulate output voltage accuracy. Use Value: Enables ±5 % output regulation without active error amplifier, reducing BOM count and cost. |
Use Scenario: Guards RS-485 transceiver inputs against induced surges on long cable runs in building management systems. IC Role / Device Role / Timing Role: Standby clamping diode connected between data line and local ground plane. Use Value: Absorbs 0.5 A transient peaks (100 μs) without degradation, preserving signal integrity during lightning-induced spikes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZT52H-B47-Q | ±2 % tolerance (46.1 V–47.9 V), lower rdif (325 Ω → 275 Ω), same package and Ptot | Better regulation stability in precision analog references; higher cost | Select when tighter voltage control is required and budget allows premium tolerance grade |
| MMBZ5270B-TP | 47 V nominal, ±5 %, SOT-23 package, 350 mW Ptot, higher rdif (600 Ω) | Smaller footprint but lower power handling; unsuitable for >7.4 mA continuous Zener current | Choose only for space-constrained boards where thermal margin permits reduced power rating |
Compared with BZT52H-B47-Q, the C47-QX trades voltage precision for cost and offers identical surge robustness; versus MMBZ5270B-TP, it delivers 2.4× higher power capacity and superior thermal performance in automotive-grade mounting configurations.
Availability
BZT52H-C47-QX is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor biasing, consumer power adapter feedback, and telecom line interface protection requiring stable component supply with AEC-Q101 compliance and traceable sourcing.
Supply support for BZT52H-C47-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 essential semiconductors for automotive, industrial, mobile, and computing markets, delivering high-performance, reliable components with scalable manufacturing.
The BZT52H-Q series belongs to Nexperia's automotive-qualified Zener diode product line, engineered specifically for robust voltage regulation and transient suppression in harsh-environment electronic control units and power management subsystems.
FAQ
What is the maximum continuous Zener current for BZT52H-C47-QX at 25 °C ambient?
At Tamb = 25 °C and with recommended PCB mounting (1 cm² cathode pad), the device supports up to 17.7 mA continuous Zener current (830 mW ÷ 47 V), assuming negligible forward drop and no additional thermal resistance beyond datasheet Rth(j-sp) = 150 K/W.
Does BZT52H-C47-QX require heatsinking in typical automotive PCB layouts?
No external heatsink is required. With its SOD123F package and specified 1 cm² cathode copper pad on FR4, the device achieves sufficient thermal dissipation for 830 mW operation at 25 °C ambient; derating begins linearly above that temperature per the 150 K/W Rth(j-sp) value.
How does the ±5 % tolerance affect regulation accuracy in a 47 V reference circuit?
The ±5 % tolerance means the actual Zener voltage falls between 44.0 V and 50.0 V at IZ = 2 mA. In practice, this results in up to ±3.0 V absolute error in open-circuit reference applications, making it suitable for non-critical clamping but not for precision analog references requiring sub-1 % stability.
Can BZT52H-C47-QX replace older BZT52C47 variants in existing designs?
Yes - BZT52H-C47-QX maintains identical electrical specifications, SOD123F mechanical outline, and marking code (C1), while adding AEC-Q101 qualification and improved thermal performance (Rth(j-sp) = 150 K/W vs. legacy 200+ K/W). No layout or schematic changes are needed for drop-in replacement.
BZT52H-C47-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:
- ±6.38%
- 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-C47-QX FAQ
1.How can I place an order for BZT52H-C47-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52H-C47-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-C47-QX reliable?
The price and inventory of BZT52H-C47-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-C47-QX is usually 5 days.
3.What payment methods are accepted for BZT52H-C47-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52H-C47-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52H-C47-QX?
BZT52H-C47-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52H-C47-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-C47-QX?
For technical support, including BZT52H-C47-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52H-C47-QX requirements.
6.How does Aetrix verify that BZT52H-C47-QX is sourced from the original manufacturer or authorized distributors?
All BZT52H-C47-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-C47-QX meets industry standards.
7.What is the process for return or replacement of BZT52H-C47-QX?
All BZT52H-C47-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZT52H-C47-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-C47-QX part is unused and in its original packaging.
Return procedure for BZT52H-C47-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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