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Nexperia USA Inc. BZT52H-B9V1-QX
- Part No.:
- BZT52H-B9V1-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52H-B9V1-QX.pdf
- Description:
- DIODE ZENER 9.1V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:5,296
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Product details
Overview
BZT52H-B9V1-QX from Nexperia is a ±2 % tolerance Zener diode in SOD123F package, rated for 9.1 V nominal breakdown voltage at 5 mA, 830 mW total power dissipation, and qualified to AEC-Q101 for automotive voltage regulation and reference applications.
For engineers reviewing the BZT52H-B9V1-QX datasheet, BZT52H-B9V1-QX pinout, BZT52H-B9V1-QX application, or BZT52H-B9V1-QX equivalent, this page delivers verified Zener voltage, thermal resistance, differential resistance, reverse current, and automotive qualification status - all critical for precision biasing, overvoltage clamping, and ECU reference design.
Technical Context
This Zener diode operates in reverse-biased breakdown mode with a tightly controlled 9.1 V (±2 %) regulation voltage at IZ = 5 mA. Its low 100 Ω typical differential resistance ensures stable output under load variation, while its −0.5 mV/K temperature coefficient minimizes drift across −65 °C to +150 °C ambient range.
Designed for surface-mount use on FR4 PCBs with single-sided copper, it delivers 830 mW power handling at Tamb ≤ 25 °C and maintains 3.0 A non-repetitive peak reverse current capability (tp = 100 μs), supporting transient suppression in automotive power rails and sensor interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 9.1 V ±2 % at IZ = 5 mA - defines precise DC reference or clamp level in feedback loops and protection circuits |
| Differential Resistance rdif | 100 Ω max - ensures minimal output voltage shift under varying load current in regulation applications |
| Reverse Current IR | 0.5 μA max at VR = 7.2 V - guarantees low leakage in high-impedance bias networks |
| Total Power Dissipation Ptot | 830 mW at Tamb ≤ 25 °C - enables robust operation in compact automotive modules without forced cooling |
| Thermal Resistance Rth(j-sp) | 70 K/W - reflects efficient heat transfer from junction to cathode solder point on standard FR4 layout |
| Junction Temperature Range | −65 °C to +150 °C - supports under-hood deployment in engine control units and body electronics |
| AEC-Q101 Qualified | Yes - validated for automotive discrete semiconductor stress testing including HTGB, HTRB, and temperature cycling |
Pinout & Package
SOD123F plastic surface-mounted package: 2-terminal, flat lead, small outline (3.6 mm × 1.7 mm × 1.0 mm), cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal - polarity-critical for correct Zener conduction |
| 2 | Anode (A) | Connected to ground or lower-potential rail; reverse-biased configuration enables voltage regulation |
Key Features
| Feature | Design Value |
|---|---|
| Automotive Qualification | AEC-Q101 qualified - meets reliability requirements for engine management, ADAS sensors, and infotainment power supplies |
| Voltage Tolerance | ±2 % at IZ = 5 mA - tighter than standard ±5 % Zeners, enabling higher-accuracy reference designs |
| Power Handling | 830 mW total dissipation - supports higher-current regulation without derating in thermally constrained PCB areas |
| Low Thermal Resistance | 70 K/W junction-to-solder-point - reduces thermal rise during sustained conduction, improving long-term stability |
| Small Form Factor | SOD123F footprint (3.6 mm × 1.7 mm) - saves board space in dense automotive ECUs and portable industrial controllers |
Applications
| Engine Control Unit (ECU) Reference | Infotainment Power Rail Clamp |
|---|---|
Use Scenario: Providing stable 9.1 V reference for analog-to-digital converter (ADC) biasing in engine knock sensor signal conditioning. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to generate fixed reference voltage independent of supply fluctuations. Use Value: ±2 % tolerance and −0.5 mV/K TC ensure ADC full-scale accuracy remains within 0.3 % over −40 °C to +125 °C operating range. |
Use Scenario: Clamping 12 V battery-derived power rail against load dump transients in head unit power management. IC Role / Device Role / Timing Role: Fast-acting voltage limiter absorbing surge energy via controlled reverse conduction. Use Value: 3.0 A non-repetitive peak reverse current (100 μs) and 830 mW steady-state dissipation handle ISO 7637-2 Pulse 5a without degradation. |
| Body Control Module (BCM) Voltage Monitor | ADAS Camera Bias Supply |
Use Scenario: Monitoring 5 V microcontroller supply rail using resistive divider into comparator, with Zener as threshold reference. IC Role / Device Role / Timing Role: Precision voltage reference establishing trip point for undervoltage lockout (UVLO) detection. Use Value: 0.5 μA max reverse leakage at 7.2 V prevents false triggering in high-impedance sensing paths. |
Use Scenario: Generating clean 9.1 V bias for CMOS image sensor analog front-end in rear-view camera module. IC Role / Device Role / Timing Role: Low-noise DC reference source stabilizing pixel readout circuitry against supply ripple. Use Value: 100 Ω differential resistance suppresses noise coupling from switching DC/DC converters feeding adjacent digital logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZT52H-C9V1-Q | ±5 % tolerance, 150 Ω max rdif, 0.7 μA max IR at 7.2 V | Lower cost, wider voltage spread - suitable for non-critical biasing where ±5 % is acceptable | Select when budget constraints outweigh precision needs and thermal margin allows higher rdif-induced drift |
| MMSZ5240B-TP | ±5 % tolerance, SOD-123 package, 9.1 V, 500 mW Ptot, 150 °C Tj | Lower power rating and no AEC-Q101 qualification - limited to consumer or industrial non-automotive use | Choose only for non-automotive prototypes or cost-sensitive non-qualification applications requiring same footprint |
Compared with BZT52H-B9V1-QX, the C-grade offers relaxed tolerance and higher leakage for cost reduction, while MMSZ5240B-TP lacks automotive qualification and thermal robustness - making BZT52H-B9V1-QX the sole choice for production AEC-Q101-compliant systems demanding 9.1 V precision.
Availability
BZT52H-B9V1-QX is available at Aetrix Electronics and suitable for automotive engine control units, infotainment power clamping, and ADAS camera bias supply requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZT52H-B9V1-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.
BZT52H-B9V1-QX belongs to the BZT52H-Q series of AEC-Q101-qualified Zener diodes, engineered specifically for precision voltage regulation and transient protection in harsh automotive environments.
FAQ
What is the exact Zener voltage tolerance and test condition for BZT52H-B9V1-QX?
The BZT52H-B9V1-QX has a nominal Zener voltage of 9.1 V with ±2 % tolerance, measured at IZ = 5 mA and Tj = 25 °C. This is confirmed in Table 8 of the official Nexperia datasheet Rev. 1 (2021), where "B" grade devices are explicitly defined for ±2 % tolerance across the full 2.4 V–75 V range.
Is BZT52H-B9V1-QX suitable for reflow soldering, and what is the recommended profile?
Yes - the SOD123F package is qualified exclusively for reflow soldering per Nexperia's footprint guidelines (Fig. 12). The recommended process uses standard lead-free (SnAgCu) profiles with peak temperature ≤ 260 °C, ramp rate ≤ 3 °C/s, and time above 217 °C limited to 60–150 seconds, as specified in the manufacturer's SOD123F soldering documentation.
How does the temperature coefficient affect regulation accuracy over automotive temperature ranges?
At IZ = 5 mA, BZT52H-B9V1-QX exhibits a temperature coefficient of −0.5 mV/K (Table 8), resulting in approximately ±57 mV drift from −40 °C to +125 °C - equivalent to ±0.63 % of 9.1 V. This is fully characterized and included in the AEC-Q101 qualification for stable operation in under-hood environments.
Can BZT52H-B9V1-QX replace older BZT52C9V1 or BZX79-B9V1 in existing designs?
No direct drop-in replacement: BZT52H-B9V1-QX uses SOD123F (3.6 mm × 1.7 mm), while BZT52C9V1 uses SOD123 (3.7 mm × 1.6 mm) and BZX79-B9V1 uses DO-35 (4.5 mm × 2.0 mm). Footprint and thermal performance differ - redesign of pad layout and thermal relief is required to leverage its 830 mW rating and AEC-Q101 qualification.
BZT52H-B9V1-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):
- 9.1 V
- Tolerance:
- ±1.98%
- Power - Max:
- 375 mW
- Impedance (Max) (Zzt):
- 10 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 6 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-B9V1-QX FAQ
1.How can I place an order for BZT52H-B9V1-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52H-B9V1-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-B9V1-QX reliable?
The price and inventory of BZT52H-B9V1-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-B9V1-QX is usually 5 days.
3.What payment methods are accepted for BZT52H-B9V1-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52H-B9V1-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52H-B9V1-QX?
BZT52H-B9V1-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52H-B9V1-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-B9V1-QX?
For technical support, including BZT52H-B9V1-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52H-B9V1-QX requirements.
6.How does Aetrix verify that BZT52H-B9V1-QX is sourced from the original manufacturer or authorized distributors?
All BZT52H-B9V1-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-B9V1-QX meets industry standards.
7.What is the process for return or replacement of BZT52H-B9V1-QX?
All BZT52H-B9V1-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZT52H-B9V1-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-B9V1-QX part is unused and in its original packaging.
Return procedure for BZT52H-B9V1-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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