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Nexperia USA Inc. BZT52H-B36-QX
- Part No.:
- BZT52H-B36-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52H-B36-QX.pdf
- Description:
- DIODE ZENER 36V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:2,207
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Product details
Overview
BZT52H-B36-QX from Nexperia is a ±2 % tolerance Zener diode in SOD123F package, rated for 36 V nominal breakdown voltage at IZ = 2 mA, 830 mW total power dissipation, and qualified to AEC-Q101 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-B36-QX datasheet, BZT52H-B36-QX pinout, BZT52H-B36-QX application, or BZT52H-B36-QX equivalent, key selection criteria include Zener voltage tolerance (±2 %), thermal resistance (150 K/W junction-to-solder point), differential resistance (250 Ω max), reverse current (60 μA max at VR = 28.8 V), and automotive qualification status.
Technical Context
This Zener diode operates in reverse-biased breakdown mode to maintain a stable 36 V reference under regulated current conditions. Its ±2 % tolerance ensures precise voltage setting for feedback networks and protection thresholds in automotive ECUs and body control modules.
Designed for surface-mount assembly on FR4 PCBs with single-sided copper, it delivers 830 mW power handling at Tamb ≤ 25 °C and supports non-repetitive surge currents up to 0.8 A (100 μs pulse). The SOD123F package enables compact layout while meeting AEC-Q101 stress test requirements for temperature cycling, humidity, and mechanical shock.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 35.3 V to 36.7 V at IZ = 2 mA - defines tight regulation window for precision reference applications |
| Tolerance | ±2 % - enables accurate voltage threshold setting without post-production trimming |
| Power Dissipation (Ptot) | 830 mW at Tamb ≤ 25 °C - supports continuous operation in thermally constrained automotive PCB layouts |
| Differential Resistance (rdif) | 250 Ω max at IZ = 2 mA - limits output impedance drift under load variation |
| Reverse Current (IR) | 60 μA max at VR = 28.8 V - ensures low leakage in standby and sleep-mode circuits |
| Thermal Resistance (Rth(j-sp)) | 150 K/W junction-to-solder point - enables thermal modeling for solder pad design and reliability prediction |
| Temperature Coefficient (SZ) | +0.05 mV/K - indicates near-zero TC for stable performance across -65 °C to +150 °C ambient range |
Pinout & Package
SOD123F surface-mount plastic package with 2 leads: cathode (K) marked by bar, anode (A) unmarked; dimensions 3.6 mm × 1.7 mm × 1.0 mm; optimized for reflow soldering on standard 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; forms reverse-biased junction enabling Zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, HAST, and mechanical shock per discrete semiconductor standard |
| ±2 % Zener voltage tolerance | Reduces need for binning or external calibration in safety-critical voltage monitoring paths |
| 830 mW power rating | Enables direct integration into 12 V/24 V system clamp circuits without heatsinking |
| SOD123F footprint | Compatible with industry-standard reflow profiles and automated pick-and-place equipment |
| Low thermal resistance (150 K/W) | Supports reliable operation in high-temperature engine bay environments with minimal derating |
Applications
| Automotive Body Control Module (BCM) | Infotainment Power Supply Monitoring |
|---|---|
Use Scenario: Regulating reference voltage for microcontroller ADC input in door module power management. IC Role / Device Role / Timing Role: Zener diode provides stable 36 V reference for analog sensing circuitry. Use Value: ±2 % tolerance ensures consistent ADC code mapping across production units and temperature ranges. |
Use Scenario: Clamping 12 V supply rail against load-dump transients in head unit DC-DC converter feedback loop. IC Role / Device Role / Timing Role: Acts as overvoltage protector to prevent regulator IC damage during ISO 7637-2 pulse 5a events. Use Value: 830 mW power rating absorbs transient energy without degradation when paired with series resistor. |
| Engine Control Unit (ECU) Sensor Biasing | ADAS Camera Module Reference |
Use Scenario: Providing bias voltage for pressure sensor bridge excitation in fuel injection control. IC Role / Device Role / Timing Role: Supplies stable excitation voltage independent of battery fluctuations. Use Value: Near-zero temperature coefficient (+0.05 mV/K) maintains sensor accuracy across -40 °C to +125 °C operating range. |
Use Scenario: Generating reference voltage for image sensor analog front-end in surround-view camera. IC Role / Device Role / Timing Role: Delivers low-noise, low-drift reference for pixel-level signal conditioning. Use Value: 250 Ω differential resistance minimizes gain error in op-amp-based reference buffers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZT52H-C36-Q | ±5 % tolerance, higher IR (100 μA max at VR = 28.8 V), same VZ range (34–38 V) | Acceptable where cost sensitivity outweighs precision requirement | Select for non-safety-critical consumer-grade subsystems with relaxed voltage stability needs |
| MMSZ5245B-TP | ±5 % tolerance, 500 mW Ptot, SOD-123 package (not AEC-Q101 qualified) | Lacks automotive qualification and thermal robustness for under-hood deployment | Use only in industrial or commercial applications with ambient < 85 °C and no AEC compliance mandate |
Compared with BZT52H-C36-Q and MMSZ5245B-TP, the BZT52H-B36-QX offers tighter tolerance and automotive qualification-critical for functional safety in BCM and ECU designs-while maintaining identical SOD123F footprint and thermal interface characteristics.
Availability
BZT52H-B36-QX is available at Aetrix Electronics and suitable for automotive body control modules, infotainment power monitoring, and ADAS camera reference circuits requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZT52H-B36-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 efficiency-driven solutions for automotive, industrial, and mobile markets, with leadership in logic, discretes, and MOSFETs.
The BZT52H-Q series belongs to Nexperia's automotive-qualified Zener diode product line, engineered specifically for voltage regulation and transient protection in harsh-environment electronic control units.
FAQ
What is the maximum reverse current specification for BZT52H-B36-QX at 28.8 V?
The maximum reverse current (IR) is 60 μA at VR = 28.8 V and Tj = 25 °C, measured under specified test conditions per Table 9 of the datasheet. This low leakage supports energy-efficient operation in always-on vehicle subsystems.
Does BZT52H-B36-QX require heatsinking in typical automotive PCB layouts?
No heatsink is required for continuous operation at 830 mW when mounted on an FR4 PCB with single-sided copper and a 1 cm² cathode pad, as its Rth(j-sp) is 150 K/W. Derating begins above 25 °C ambient, with full power usable up to ~75 °C board temperature.
How does the ±2 % tolerance affect circuit accuracy compared to ±5 % variants?
The ±2 % tolerance reduces worst-case Zener voltage spread from ±1.8 V (±5 % of 36 V) to ±0.72 V, improving ADC reference accuracy by 2.5× and tightening overvoltage trip margins in protection circuits-essential for ASIL-B compliant designs.
Can BZT52H-B36-QX be used in place of older BZT52C36 or BZX79-C36 parts?
Yes, but with critical differences: BZT52H-B36-QX has tighter tolerance (±2 % vs ±5 %), higher power rating (830 mW vs 500 mW), AEC-Q101 qualification, and SOD123F package (vs DO-35). Layout and thermal design must accommodate the new footprint and enhanced surge capability.
BZT52H-B36-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):
- 36 V
- Tolerance:
- ±1.94%
- Power - Max:
- 375 mW
- Impedance (Max) (Zzt):
- 60 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 25.2 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-B36-QX FAQ
1.How can I place an order for BZT52H-B36-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52H-B36-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-B36-QX reliable?
The price and inventory of BZT52H-B36-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-B36-QX is usually 5 days.
3.What payment methods are accepted for BZT52H-B36-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52H-B36-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52H-B36-QX?
BZT52H-B36-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52H-B36-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-B36-QX?
For technical support, including BZT52H-B36-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52H-B36-QX requirements.
6.How does Aetrix verify that BZT52H-B36-QX is sourced from the original manufacturer or authorized distributors?
All BZT52H-B36-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-B36-QX meets industry standards.
7.What is the process for return or replacement of BZT52H-B36-QX?
All BZT52H-B36-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZT52H-B36-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-B36-QX part is unused and in its original packaging.
Return procedure for BZT52H-B36-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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