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Nexperia USA Inc. BZT52H-C36-QX
- Part No.:
- BZT52H-C36-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52H-C36-QX.pdf
- Description:
- DIODE ZENER 36V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:2,416
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Product details
Overview
BZT52H-C36-QX from Nexperia is a ±5 % tolerance Zener diode in SOD123F package, rated for 36 V nominal breakdown voltage at IZ = 2 mA, 250 mA maximum forward current, and 830 mW total power dissipation. It is AEC-Q101 qualified and used for precision voltage regulation in automotive power supply rails and sensor biasing circuits.
For engineers reviewing the BZT52H-C36-QX datasheet, BZT52H-C36-QX pinout, BZT52H-C36-QX application, or BZT52H-C36-QX equivalent, key selection criteria include Zener voltage tolerance (±5 %), 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 stable reference voltage under varying load and temperature conditions. Its ±5 % tolerance band and low temperature coefficient (±0.05 mV/K) support robust regulation in automotive ambient ranges (−65 °C to +150 °C).
The device uses silicon planar technology with metallized cathode termination and is optimized for surface-mount reflow soldering on FR4 PCBs with defined thermal pad layout. Junction-to-solder-point thermal resistance of 150 K/W enables reliable power handling up to 830 mW at Tamb ≤ 25 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 34.0 V to 38.0 V at IZ = 2 mA - defines regulated output range for feedback or reference use |
| Differential Resistance (rdif) | ≤ 250 Ω - limits output impedance drift under dynamic load changes |
| Reverse Current (IR) | ≤ 60 μA at VR = 28.8 V - ensures low leakage in standby or low-power modes |
| Forward Voltage (VF) | ≤ 0.9 V at IF = 10 mA - supports low-loss anode-side clamping or polarity protection |
| Total Power Dissipation (Ptot) | 830 mW at Tamb ≤ 25 °C with 1 cm² cathode pad - sets thermal design boundary for PCB copper area |
| Junction Temperature (Tj) | −65 °C to +150 °C - enables operation in under-hood automotive environments |
| AEC-Q101 Qualified | Yes - validated for automotive discrete semiconductor stress testing including HTGB, HTRB, and ESD |
Pinout & Package
SOD123F plastic surface-mount 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.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal for correct PCB orientation |
| 2 | Anode (A) | Connected to ground or current-limiting resistor; reverse-biased during Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q101 compliant - meets stress test requirements for automotive electronics deployment |
| Thermal performance | 150 K/W junction-to-solder-point resistance - enables effective heat transfer via cathode pad |
| Voltage tolerance | ±5 % at 36 V nominal - balances cost and precision for non-critical regulation tasks |
| Low leakage | 60 μA max reverse current at 80 % VZ - minimizes quiescent power loss in always-on circuits |
| Package footprint | SOD123F - compact 3.5 × 2.6 mm outline compatible with high-density automotive PCB layouts |
Applications
| Engine Control Unit (ECU) Reference | Body Control Module (BCM) Voltage Clamp |
|---|---|
Use Scenario: Providing stable 36 V reference for analog-to-digital converter input scaling in engine management systems. IC Role / Device Role / Timing Role: Zener voltage reference diode establishing precise DC bias point for signal conditioning circuitry. Use Value: ±5 % tolerance and −65 °C to +150 °C operating range ensure consistent ADC full-scale calibration across vehicle lifetime. |
Use Scenario: Clamping transient overvoltage on 24 V battery-supplied microcontroller I/O lines during load dump events. IC Role / Device Role / Timing Role: Reverse-biased Zener acting as shunt protector to limit voltage excursion to ≤38 V. Use Value: 830 mW power rating and 40 W non-repetitive peak surge capability absorb ISO 7637-2 Pulse 5a energy without failure. |
| Automotive Sensor Bias Supply | Infotainment System Power Rail Monitor |
Use Scenario: Generating stable bias voltage for Hall-effect position sensors in transmission control assemblies. IC Role / Device Role / Timing Role: Zener regulator supplying constant current to sensor Wheatstone bridge excitation network. Use Value: 250 Ω differential resistance maintains <1 % output variation under 1 mA load shifts typical of sensor output impedance. |
Use Scenario: Monitoring 36 V auxiliary rail integrity in head unit power management subsystems. IC Role / Device Role / Timing Role: Zener-based comparator reference enabling accurate undervoltage/overvoltage detection thresholds. Use Value: Low 60 μA reverse leakage ensures minimal current draw on monitored rail during sleep mode operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZT52H-B36-Q | ±2 % tolerance (35.3 V–36.7 V), lower rdif (220 Ω max) | Higher precision required in feedback loops where <1 % error budget applies | Select when tighter voltage stability outweighs cost sensitivity |
| MMBZ5226BS-7-F | ±5 % tolerance (34.2 V–37.8 V), SOT-23 package, 350 mW Ptot | Lower power handling; suited for space-constrained but thermally benign locations | Choose only if board real estate is critical and thermal margin exceeds 350 mW |
Compared with BZT52H-C36-QX, the BZT52H-B36-Q offers improved regulation accuracy at higher cost, while MMBZ5226BS-7-F trades thermal robustness for smaller footprint-neither matches the 830 mW dissipation and AEC-Q101 validation of the original part in demanding automotive power domains.
Availability
BZT52H-C36-QX is available at Aetrix Electronics and suitable for automotive ECU reference generation, BCM overvoltage clamping, and sensor bias supply requiring stable component supply with AEC-Q101 compliance and long-term production continuity.
Supply support for BZT52H-C36-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 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 regulation, reference, and protection functions where extended temperature operation and process consistency are mandatory.
FAQ
What is the maximum reverse voltage before breakdown for BZT52H-C36-QX?
The nominal Zener voltage is 36 V with a guaranteed range of 34.0 V to 38.0 V at IZ = 2 mA. The device begins regulating above ~34 V and remains within specification up to 38 V under defined test conditions. Below 34 V, it behaves as a high-impedance reverse-biased diode with ≤60 μA leakage at 28.8 V.
Can BZT52H-C36-QX be used in place of a 33 V Zener diode?
No-BZT52H-C36-QX is specified for 36 V nominal breakdown and is not interchangeable with 33 V Zeners. Substituting it would raise regulated voltage by ~3 V, potentially exceeding IC absolute maximum ratings or altering feedback loop setpoints. Use BZT52H-C33-QX for 33 V applications.
Is the SOD123F package compatible with standard reflow profiles?
Yes-Nexperia specifies reflow soldering as the only recommended method for SOD123F. The package supports JEDEC J-STD-020-compliant profiles with peak temperatures up to 260 °C. Thermal pad layout per Figure 12 (1.2 mm × 1.1 mm solder lands, 2.9 mm × 1.6 mm occupied area) is required for reliable thermal performance.
Does BZT52H-C36-QX require external current limiting?
Yes-like all Zener diodes, it must be used with a series current-limiting resistor to prevent thermal runaway. For 830 mW dissipation at 36 V, minimum continuous current is ~23 mA; design must ensure IZ stays within 2 mA to 250 mA range depending on regulation accuracy and power margin requirements.
BZT52H-C36-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:
- ±5.56%
- 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-C36-QX FAQ
1.How can I place an order for BZT52H-C36-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52H-C36-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-C36-QX reliable?
The price and inventory of BZT52H-C36-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-C36-QX is usually 5 days.
3.What payment methods are accepted for BZT52H-C36-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52H-C36-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52H-C36-QX?
BZT52H-C36-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52H-C36-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-C36-QX?
For technical support, including BZT52H-C36-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52H-C36-QX requirements.
6.How does Aetrix verify that BZT52H-C36-QX is sourced from the original manufacturer or authorized distributors?
All BZT52H-C36-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-C36-QX meets industry standards.
7.What is the process for return or replacement of BZT52H-C36-QX?
All BZT52H-C36-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZT52H-C36-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-C36-QX part is unused and in its original packaging.
Return procedure for BZT52H-C36-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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