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Nexperia USA Inc. BZT52H-A47-QX
- Part No.:
- BZT52H-A47-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52H-A47-QX.pdf
- Description:
- DIODE ZENER 47V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:6,406
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Product details
Overview
BZT52H-A47-QX from Nexperia is a precision Zener voltage regulator diode in SOD123F package, rated for 47 V nominal breakdown voltage at 2 mA, ±1 % tolerance, 830 mW total power dissipation, and qualified to AEC-Q101 for automotive power rail stabilization and overvoltage protection circuits.
For engineers reviewing the BZT52H-A47-QX datasheet, BZT52H-A47-QX pinout, BZT52H-A47-QX application, or BZT52H-A47-QX equivalent, this device serves as a stable reference in low-power voltage regulation, ESD-protected bias networks, and automotive sensor supply conditioning where tight voltage accuracy and thermal reliability are required.
Technical Context
This Zener diode operates in reverse-bias breakdown mode with a specified 47 V nominal Zener voltage (VZ) at IZ = 2 mA, differential resistance of 325 Ω max, and temperature coefficient of +0.05 mV/K - indicating near-zero drift across operating temperature. It delivers stable regulation under ambient temperatures from −65 °C to +150 °C.
Designed for surface-mount use on FR4 PCBs with single-sided copper, it supports pulsed non-repetitive surge currents up to 0.5 A (100 μs) and exhibits 40 W peak reverse power capability. Its cathode-anode polarity is marked by a bar on the SOD123F body.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VZ (Nominal) | 47 V at IZ = 2 mA - defines precise regulation point for reference and clamp functions |
| Tolerance | ±1 % - enables high-accuracy voltage setting without external trimming |
| Ptot | 830 mW at Tamb ≤ 25 °C - sets maximum continuous DC power handling on standard PCB layout |
| rdif | 325 Ω max - determines output impedance and load regulation error under varying current |
| IR @ VR = 37.6 V | 90 μA max - specifies leakage level below breakdown, critical for low-power standby circuits |
| Tj max | 150 °C - defines absolute junction temperature limit for sustained operation in engine bay or under-hood environments |
| Rth(j-a) | 330 K/W - quantifies thermal resistance in free air, guiding heatsinking requirements for derating |
Pinout & Package
The BZT52H-A47-QX uses the SOD123F surface-mount plastic package: 3.6 mm × 1.7 mm footprint, 1.2 mm height, flat leads, cathode marked by a bar. Optimized for reflow soldering only.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal; carries reverse current during Zener operation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-bias path for voltage clamping and reference generation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD22 |
| ±1 % VZ tolerance | Enables direct replacement in precision feedback loops without calibration adjustment |
| SOD123F package | Reduces board space by >30 % vs. DO-214AC while maintaining 830 mW thermal capability |
| Low temperature coefficient | +0.05 mV/K ensures <±0.5 V drift over −40 °C to +125 °C ambient range |
| Non-repetitive IZSM | 0.5 A surge rating allows transient overvoltage suppression in CAN/LIN bus protection networks |
Applications
| Automotive Sensor Biasing | Industrial Power Rail Clamp |
|---|---|
|
Use Scenario: Stabilizing 5 V supply for analog pressure sensors in engine control units under wide temperature and load variation. IC Role / Device Role / Timing Role: Zener reference diode providing fixed 47 V clamp to protect downstream LDO input against battery dump transients. Use Value: Prevents LDO damage during ISO 7637-2 Pulse 5a events by limiting input to 47 V ±0.47 V, leveraging ±1 % tolerance and 0.5 A surge rating. |
Use Scenario: Overvoltage protection on 24 V industrial PLC backplane where surges exceed 40 V. IC Role / Device Role / Timing Role: Standalone shunt regulator clamping rail voltage to 47 V before reaching sensitive microcontroller I/O. Use Value: Limits fault energy using 830 mW steady-state dissipation and 40 W pulse rating, avoiding need for active crowbar circuitry. |
| Low-Power Reference Generator | ESD-Safe Signal Conditioning |
|
Use Scenario: Generating stable 47 V reference for high-side current sense amplifier in battery management systems. IC Role / Device Role / Timing Role: Precision Zener element establishing accurate gain-setting node in op-amp feedback path. Use Value: Delivers <±0.5 V drift over full temperature range due to +0.05 mV/K coefficient and 325 Ω rdif, ensuring measurement linearity. |
Use Scenario: Protecting RS-485 transceiver inputs from ESD and lightning-induced surges in outdoor metering equipment. IC Role / Device Role / Timing Role: Bidirectional clamp (with series resistor) absorbing ±8 kV contact discharge per IEC 61000-4-2. Use Value: Leverages 150 °C Tj max and AEC-Q101 robustness to survive repeated ESD strikes without parameter shift or failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C47 | ±5 % tolerance, SOT23 package, 300 mW Ptot, higher rdif (600 Ω) | Lower accuracy and power handling; suitable only for non-critical biasing | Select when cost sensitivity outweighs regulation stability and automotive qualification |
| MMSZ47ET1G | ±5 % tolerance, SOD-123 package, 500 mW Ptot, 470 Ω rdif, no AEC-Q101 | Lacks automotive qualification and thermal margin for under-hood use | Acceptable for commercial-grade consumer electronics where AEC compliance is not required |
Compared with BZX84-C47 and MMSZ47ET1G, the BZT52H-A47-QX provides superior voltage accuracy (±1 % vs. ±5 %), 66 % higher power rating (830 mW vs. 300–500 mW), and formal AEC-Q101 validation - making it the only choice for automotive power rail protection and precision reference designs requiring long-term parametric stability.
Availability
BZT52H-A47-QX is available at Aetrix Electronics and suitable for automotive sensor biasing, industrial power rail clamping, and low-power reference generation requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for BZT52H-A47-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 efficiency-enhancing components, delivering high-performance, reliable, and scalable solutions for automotive, industrial, and consumer markets.
The BZT52H-Q series belongs to Nexperia's automotive-qualified Zener diode product line, engineered specifically for robust voltage regulation and transient protection in harsh-environment electronic control units.
FAQ
What is the maximum continuous reverse current the BZT52H-A47-QX can sustain at 25 °C?
The device supports a maximum continuous reverse current of 250 mA, derived from its 830 mW total power dissipation rating and 47 V Zener voltage (IZ = Ptot/VZ ≈ 17.7 mA typical, but absolute max IF is specified as 250 mA in limiting values). This rating assumes proper PCB thermal design with 1 cm² cathode pad.
How does the ±1 % tolerance impact circuit performance compared to standard ±5 % Zeners?
The ±1 % tolerance reduces initial voltage error from ±2.35 V to ±0.47 V at 47 V, directly improving accuracy in feedback networks and reference generators. In closed-loop systems like voltage regulators, this minimizes trim resistor dependency and improves batch-to-batch consistency without post-production calibration.
Can the BZT52H-A47-QX be used in parallel for higher power dissipation?
No - Zener diodes exhibit negative temperature coefficients and mismatched VZ tolerances, causing current hogging and thermal runaway when paralleled. For higher power, use a single higher-rated device or implement active regulation; the BZT52H-A47-QX is designed for discrete shunt operation only.
Is the SOD123F package compatible with standard reflow profiles for lead-free assembly?
Yes - Nexperia specifies reflow soldering as the only recommended method, with JEDEC J-STD-020-compliant peak temperature up to 260 °C. The SOD123F outline (3.6 mm × 1.7 mm) and thermal pad design support uniform heating and void-free joints on standard FR4 boards with tin-plated copper.
BZT52H-A47-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%
- 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-A47-QX FAQ
1.How can I place an order for BZT52H-A47-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52H-A47-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-A47-QX reliable?
The price and inventory of BZT52H-A47-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-A47-QX is usually 5 days.
3.What payment methods are accepted for BZT52H-A47-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52H-A47-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52H-A47-QX?
BZT52H-A47-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52H-A47-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-A47-QX?
For technical support, including BZT52H-A47-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52H-A47-QX requirements.
6.How does Aetrix verify that BZT52H-A47-QX is sourced from the original manufacturer or authorized distributors?
All BZT52H-A47-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-A47-QX meets industry standards.
7.What is the process for return or replacement of BZT52H-A47-QX?
All BZT52H-A47-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZT52H-A47-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-A47-QX part is unused and in its original packaging.
Return procedure for BZT52H-A47-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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