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Nexperia USA Inc. BZT52H-B3V6-QX
- Part No.:
- BZT52H-B3V6-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52H-B3V6-QX.pdf
- Description:
- DIODE ZENER 3.6V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:7,128
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Product details
Overview
BZT52H-B3V6-QX from Nexperia is a ±2 % tolerance Zener diode in SOD123F package, rated for 3.6 V nominal breakdown voltage at 5 mA, 830 mW total power dissipation, and qualified to AEC-Q101 for automotive voltage regulation and overvoltage clamping functions.
For engineers reviewing the BZT52H-B3V6-QX datasheet, BZT52H-B3V6-QX pinout, BZT52H-B3V6-QX application, or BZT52H-B3V6-QX equivalent, this part supports precision biasing in engine control units, ECU power rail stabilization, and low-power sensor reference circuits where tight voltage tolerance and automotive-grade reliability are required.
Technical Context
This Zener diode operates in reverse-bias breakdown mode with a typical differential resistance of 95 Ω at 5 mA and temperature coefficient of −3.5 mV/K, enabling stable voltage reference under varying thermal conditions. Its cathode-anode polarity is unidirectional and fixed by the SOD123F marking bar.
Designed for surface-mount use on FR4 PCBs with single-sided copper, it delivers 375 mW derated power at 25 °C ambient and maintains 830 mW maximum dissipation with 1 cm² cathode pad cooling. Junction temperature is rated up to 150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage (VZ) | 3.53 V to 3.67 V at IZ = 5 mA - ensures ±2 % regulation accuracy for 3.6 V nominal rail stabilization |
| Differential Resistance (rdif) | 95 Ω max at IZ = 5 mA - limits output voltage drift under load current variation |
| Forward Voltage (VF) | 0.9 V max at IF = 10 mA - defines conduction threshold in forward bias for protection path design |
| Total Power Dissipation (Ptot) | 830 mW at Tamb ≤ 25 °C with 1 cm² cathode pad - sets maximum continuous power handling in thermally optimized layout |
| Reverse Current (IR) | 5 μA max at VR = 1 V - guarantees low leakage in standby or high-impedance sensing nodes |
| Junction Temperature (Tj) | −65 °C to +150 °C - supports operation in under-hood automotive environments |
| AEC-Q101 Qualified | Yes - validated for automotive discrete semiconductor stress testing including HTGB, HTRB, and temperature cycling |
Pinout & Package
SOD123F surface-mount plastic package: 2-terminal, flat lead, 3.4–3.6 mm length × 2.5–2.7 mm width × 1.0–1.2 mm height; cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; polarity must be observed for correct Zener breakdown orientation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; forms reverse-biased junction with cathode |
Key Features
| Feature | Design Value |
|---|---|
| ±2 % VZ tolerance | Enables tighter regulation than ±5 % variants, reducing need for post-regulation trimming in safety-critical ECUs |
| AEC-Q101 qualification | Validates robustness against automotive thermal cycling, humidity, and mechanical shock per industry standard |
| 830 mW power rating | Supports higher-energy transient suppression in 12 V vehicle systems without external heatsinking |
| SOD123F footprint | Compatible with standard reflow soldering processes and fits high-density PCB layouts with 2.8 mm pad spacing |
| Low 5 μA reverse leakage | Minimizes quiescent current draw in always-on automotive modules such as CAN wake-up receivers |
Applications
| Engine Control Unit (ECU) Reference | Body Control Module (BCM) Voltage Clamp |
|---|---|
Use Scenario: Providing stable 3.6 V reference for microcontroller ADC and analog comparators in gasoline/diesel engine management systems. IC Role / Device Role / Timing Role: Zener voltage reference diode supplying precision bias to analog front-end circuitry. Use Value: ±2 % tolerance ensures consistent ADC full-scale calibration across temperature and production lot variance. |
Use Scenario: Clamping 12 V supply transients induced by relay switching or load dump in door module power rails. IC Role / Device Role / Timing Role: Overvoltage protection device shunting surge energy to ground during negative-going spikes. Use Value: 830 mW power rating absorbs 40 W non-repetitive surges (100 μs) without failure, meeting ISO 7637-2 Pulse 1/2a requirements. |
| Automotive Sensor Interface | Infotainment System Bias Supply |
Use Scenario: Generating local 3.6 V bias for Hall-effect crankshaft position sensors operating near hot engine blocks. IC Role / Device Role / Timing Role: Temperature-stable voltage reference maintaining sensor signal integrity across −40 °C to +125 °C ambient. Use Value: −3.5 mV/K temperature coefficient minimizes offset drift, preserving timing resolution within ±0.5° crank angle error. |
Use Scenario: Regulating auxiliary 3.6 V rail for display backlight driver ICs in dashboard clusters. IC Role / Device Role / Timing Role: Low-leakage Zener regulator stabilizing supply to PWM-controlled LED drivers. Use Value: 5 μA max reverse current prevents battery drain during vehicle sleep mode, extending key-off runtime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZT52H-A3V6-Q | ±1 % VZ tolerance (3.56–3.64 V), higher cost, identical SOD123F package and thermal specs | Used where tighter regulation is mandated by functional safety ASIL-B diagnostics | Select when ADC reference accuracy or fault-detection thresholds require sub-±2 % drift budget |
| BZT52H-C3V6-Q | ±5 % VZ tolerance (3.40–3.80 V), lower cost, same package and power rating | Deployed in non-safety-critical subsystems like HVAC fan control or mirror adjustment | Choose for cost-sensitive designs where 3.6 V nominal is sufficient and ±5 % variation is acceptable |
Compared with BZT52H-A3V6-Q, the BZT52H-B3V6-QX trades ±1 % precision for lower unit cost while retaining AEC-Q101 qualification; versus BZT52H-C3V6-Q, it provides twice the voltage accuracy at modest cost increase-making it optimal for mid-tier automotive modules balancing performance and BOM cost.
Availability
BZT52H-B3V6-QX is available at Aetrix Electronics and suitable for engine control units, body control modules, automotive sensor interfaces, and infotainment system bias supplies requiring stable component supply with automotive-grade traceability.
Supply support for BZT52H-B3V6-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 high-volume, high-reliability logic, discrete, and MOSFET solutions, with leadership in automotive-qualified components.
The BZT52H-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode product line, engineered specifically for voltage regulation and transient protection in harsh automotive environments.
FAQ
What is the maximum reverse voltage this diode can withstand before breakdown?
The BZT52H-B3V6-QX has a nominal Zener voltage of 3.6 V, with guaranteed breakdown between 3.53 V and 3.67 V at 5 mA test current. It is not rated for sustained reverse voltage above this range; operation beyond 3.67 V will cause uncontrolled conduction and potential thermal runaway unless current-limited.
Is this diode suitable for bidirectional ESD protection?
No. The BZT52H-B3V6-QX is a unidirectional Zener diode with defined anode and cathode terminals. It conducts only in reverse breakdown (cathode positive relative to anode) and offers no forward conduction protection. For bidirectional ESD clamping, TVS diodes such as PESD5V0S1BA are required.
How does the SOD123F package affect thermal performance compared to DO-35?
The SOD123F package achieves 150 K/W junction-to-solder-point thermal resistance-significantly better than DO-35's typical 300+ K/W-due to its exposed cathode pad and optimized copper land layout. This enables 830 mW dissipation with minimal board area, unlike axial DO-35 which requires larger keep-out zones and suffers higher thermal impedance.
Can this part replace older BZT52C3V6 in existing designs?
Yes, with caveats: BZT52H-B3V6-QX offers tighter ±2 % tolerance (vs. ±5 % for BZT52C3V6), identical SOD123F footprint, and AEC-Q101 qualification. However, its differential resistance is 95 Ω (vs. ~100 Ω), and thermal resistance is lower. Layout and thermal validation are recommended, especially in high-temperature environments.
BZT52H-B3V6-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):
- 3.6 V
- Tolerance:
- ±1.94%
- Power - Max:
- 375 mW
- Impedance (Max) (Zzt):
- 95 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 1 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-B3V6-QX FAQ
1.How can I place an order for BZT52H-B3V6-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52H-B3V6-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-B3V6-QX reliable?
The price and inventory of BZT52H-B3V6-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-B3V6-QX is usually 5 days.
3.What payment methods are accepted for BZT52H-B3V6-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52H-B3V6-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52H-B3V6-QX?
BZT52H-B3V6-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52H-B3V6-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-B3V6-QX?
For technical support, including BZT52H-B3V6-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52H-B3V6-QX requirements.
6.How does Aetrix verify that BZT52H-B3V6-QX is sourced from the original manufacturer or authorized distributors?
All BZT52H-B3V6-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-B3V6-QX meets industry standards.
7.What is the process for return or replacement of BZT52H-B3V6-QX?
All BZT52H-B3V6-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZT52H-B3V6-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-B3V6-QX part is unused and in its original packaging.
Return procedure for BZT52H-B3V6-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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