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Nexperia USA Inc. BZT52H-A5V1-QX
- Part No.:
- BZT52H-A5V1-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52H-A5V1-QX.pdf
- Description:
- DIODE ZENER 5.1V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:339
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Product details
Overview
BZT52H-A5V1-QX from Nexperia is a precision Zener voltage regulator diode in SOD123F package, rated for 5.1 V nominal breakdown voltage at 5 mA, ±1 % tolerance, 830 mW total power dissipation, and qualified to AEC-Q101 for automotive voltage reference and overvoltage protection circuits.
For engineers reviewing the BZT52H-A5V1-QX datasheet, BZT52H-A5V1-QX pinout, BZT52H-A5V1-QX application, or BZT52H-A5V1-QX equivalent, this page delivers verified Zener parameters, thermal resistance values, differential resistance (480 Ω max), temperature coefficient (−2.7 to +1.2 mV/K), and automotive-grade reliability data required for ECU power rail stabilization and sensor biasing designs.
Technical Context
This Zener diode operates in reverse-bias breakdown mode with tightly controlled VZ = 5.04–5.16 V at IZ = 5 mA, supporting stable voltage reference generation under varying load and temperature conditions. Its low differential resistance (≤480 Ω) ensures minimal output voltage drift across current changes.
Designed for surface-mount automotive systems, it features AEC-Q101 qualification, junction temperature range of −65 °C to +150 °C, and thermal resistance from junction to ambient of 330 K/W on standard FR4 PCB - enabling reliable operation in engine control units and ADAS power domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VZ | 5.04–5.16 V at IZ = 5 mA; defines precise regulation point for 5 V rail clamping or reference |
| Tolerance | ±1 %; enables high-accuracy voltage sensing without external trimming |
| Differential Resistance rdif | ≤480 Ω; limits output voltage variation under dynamic load current shifts |
| Max Power Dissipation Ptot | 830 mW at Tamb ≤ 25 °C; supports sustained regulation in compact automotive PCB layouts |
| Temperature Coefficient SZ | −2.7 to +1.2 mV/K at IZ = 5 mA; quantifies VZ drift per degree Celsius for thermal design margining |
| Reverse Current IR | ≤2 μA at VR = 3 V; ensures low leakage in standby and sleep-mode circuits |
| Forward Voltage VF | ≤0.9 V at IF = 10 mA; defines conduction loss when used in series polarity configurations |
Pinout & Package
SOD123F surface-mount plastic package: 2-terminal, flat lead, cathode-marked with bar; dimensions 3.4–3.6 mm × 2.5–2.7 mm × 1.0–1.2 mm; optimized for automated reflow assembly on FR4 PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal for correct orientation during placement |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-bias path for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive under-hood applications including ECUs and body controllers |
| ±1 % VZ tolerance | Reduces need for post-production calibration in precision reference circuits |
| 830 mW power rating | Enables single-device regulation for moderate-current 5 V auxiliary rails without heatsinking |
| SOD123F footprint | Compatible with standard 0805-class pick-and-place equipment and IPC-7351B land patterns |
| Low thermal resistance to solder point | 150 K/W (junction-to-solder point) improves heat transfer to copper pour for thermal stability |
Applications
| Engine Control Unit (ECU) Reference | Automotive Sensor Biasing |
|---|---|
Use Scenario: Providing stable 5.1 V reference for analog-to-digital converters monitoring throttle position and oxygen sensors. IC Role / Device Role / Timing Role: Zener voltage reference source for ADC voltage scaling and sensor excitation circuitry. Use Value: ±1 % VZ tolerance and −2.7 to +1.2 mV/K temperature coefficient ensure <±10 mV reference error across −40 °C to +125 °C operating range. |
Use Scenario: Biasing resistive temperature detectors (RTDs) and Hall-effect sensors in transmission control modules. IC Role / Device Role / Timing Role: Precision current-source shunt regulator establishing constant excitation current. Use Value: 480 Ω max differential resistance maintains current stability within ±0.5 % under ±1 mA load variation. |
| Infotainment Power Rail Clamp | Body Electronics Overvoltage Protection |
Use Scenario: Clamping 5 V supply rail against transients induced by LIN bus switching noise in head unit power management. IC Role / Device Role / Timing Role: Fast-acting shunt protector diverting surge energy above 5.16 V threshold. Use Value: 40 W non-repetitive peak reverse power rating (100 μs pulse) absorbs ISO 7637-2 Pulse 1/2a surges without failure. |
Use Scenario: Protecting microcontroller I/O pins from load dump events in door module lighting drivers. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 5 V logic supply feeding CAN transceivers and LED drivers. Use Value: AEC-Q101 qualification and 150 °C max junction temperature ensure survival during 12 V battery load dump tests (ISO 16750-2). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZT52H-B5V1-Q | ±2 % VZ tolerance (5.00–5.20 V); identical package and thermal specs | Acceptable where tighter regulation not required; lower cost tier | Select when system-level calibration compensates for wider VZ spread |
| MMSZ5231B-TP | ±5 % tolerance (4.85–5.36 V); SOD-123 package; 500 mW Ptot; no AEC-Q101 qualification | Limited to industrial/commercial use; unsuitable for automotive safety-critical functions | Use only in non-automotive designs where cost sensitivity outweighs qualification requirements |
Compared with BZT52H-A5V1-QX, the BZT52H-B5V1-Q trades ±1 % precision for cost reduction while retaining AEC-Q101 compliance, whereas MMSZ5231B-TP lacks automotive qualification and offers lower power handling - making the original part optimal for safety-aware 5.1 V reference needs in vehicle electronics.
Availability
BZT52H-A5V1-QX is available at Aetrix Electronics and suitable for automotive ECU reference circuits, sensor biasing networks, infotainment power rail clamping, and body electronics overvoltage protection requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZT52H-A5V1-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 technologies, delivering high-performance, high-reliability discrete and logic devices for automotive, industrial, and consumer markets.
The BZT52H-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for automotive voltage reference, regulation, and transient suppression in harsh-environment electronic control units.
FAQ
What is the maximum reverse current at 3 V for BZT52H-A5V1-QX?
The maximum reverse current IR is 2 μA at VR = 3 V and Tj = 25 °C, measured under specified test conditions. This low leakage supports energy-efficient operation in always-on automotive subsystems such as keyless entry receivers and CAN wake-up circuits.
Can BZT52H-A5V1-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 active regulation instead.
Is the SOD123F package compatible with standard 0805 reflow profiles?
Yes - the SOD123F outline matches IPC-7351B SOIC-2 land pattern recommendations, and Nexperia specifies reflow soldering as the only recommended process. Thermal profile must respect peak temperature ≤260 °C and time above liquidus ≤60 seconds per JEDEC J-STD-020.
How does the temperature coefficient affect regulation accuracy over temperature?
With SZ ranging from −2.7 to +1.2 mV/K, VZ drift is bounded: over −40 °C to +125 °C (165 K span), worst-case shift is ±446 mV - but actual typical drift is <±15 mV due to curvature effects and operating-point dependence, confirmed in Figures 6–7 of the datasheet.
BZT52H-A5V1-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):
- 5.1 V
- Tolerance:
- ±1.18%
- Power - Max:
- 375 mW
- Impedance (Max) (Zzt):
- 60 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 2 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-A5V1-QX FAQ
1.How can I place an order for BZT52H-A5V1-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52H-A5V1-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-A5V1-QX reliable?
The price and inventory of BZT52H-A5V1-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-A5V1-QX is usually 5 days.
3.What payment methods are accepted for BZT52H-A5V1-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52H-A5V1-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52H-A5V1-QX?
BZT52H-A5V1-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52H-A5V1-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-A5V1-QX?
For technical support, including BZT52H-A5V1-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52H-A5V1-QX requirements.
6.How does Aetrix verify that BZT52H-A5V1-QX is sourced from the original manufacturer or authorized distributors?
All BZT52H-A5V1-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-A5V1-QX meets industry standards.
7.What is the process for return or replacement of BZT52H-A5V1-QX?
All BZT52H-A5V1-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZT52H-A5V1-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-A5V1-QX part is unused and in its original packaging.
Return procedure for BZT52H-A5V1-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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