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Nexperia USA Inc. BZT52H-A9V1-QX
- Part No.:
- BZT52H-A9V1-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52H-A9V1-QX.pdf
- Description:
- DIODE ZENER 9.1V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:2,990
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Product details
Overview
BZT52H-A9V1-QX from Nexperia is a precision Zener voltage regulator diode in SOD123F package, rated for 9.1 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-A9V1-QX datasheet, BZT52H-A9V1-QX pinout, BZT52H-A9V1-QX application, or BZT52H-A9V1-QX equivalent, this page delivers verified electrical parameters, thermal performance data, automotive-grade reliability context, and real-world use cases in power rail stabilization and ESD-protected signal conditioning.
Technical Context
This device operates as a two-terminal shunt voltage reference, maintaining stable reverse-biased conduction above its specified 9.1 V Zener voltage with low differential resistance (100 Ω max at IZ = 5 mA) and temperature coefficient of +3.8 mV/K at 5 mA. It exhibits <2 μA reverse leakage at 7.3 V and forward voltage ≤0.9 V at 10 mA.
Designed for surface-mount automotive applications, it features AEC-Q101 qualification, junction temperature range of −65 °C to +150 °C, and thermal resistance of 150 K/W (junction-to-solder point), enabling reliable operation under transient thermal stress in engine control units and body electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.00 V to 9.20 V at IZ = 5 mA - tight ±1 % tolerance enables accurate 9.1 V rail clamping in feedback loops. |
| Differential Resistance (rdif) | ≤100 Ω at IZ = 5 mA - ensures minimal output voltage shift under load current variation. |
| Reverse Leakage (IR) | ≤2 μA at VR = 7.3 V - guarantees low standby power loss in always-on automotive modules. |
| Total Power Dissipation (Ptot) | 830 mW at Tamb ≤ 25 °C on FR4 PCB with 1 cm² cathode pad - supports sustained regulation in compact layouts. |
| Thermal Resistance (Rth(j-sp)) | 150 K/W - allows direct thermal coupling to PCB copper for effective heat transfer in high-temperature environments. |
| Temperature Coefficient (SZ) | +3.8 mV/K at IZ = 5 mA - predictable positive drift simplifies compensation in wide-temperature-range designs. |
| Forward Voltage (VF) | ≤0.9 V at IF = 10 mA - enables efficient anode-side biasing in dual-direction protection schemes. |
Pinout & Package
SOD123F surface-mount plastic package: 2.5–2.7 mm length × 1.2–1.5 mm width × 0.9–1.1 mm height; cathode marked by bar; optimized for reflow soldering per IPC-7095.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal; carries reverse current during Zener conduction. |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes current path during regulation; serves as thermal anchor via solder pad. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive under-hood and cabin applications including engine management and ADAS sensor interfaces. |
| ±1 % Zener voltage tolerance | Enables precise voltage threshold setting without post-manufacturing trimming in safety-critical monitoring circuits. |
| 830 mW power rating | Supports robust transient suppression in 12 V automotive systems with peak surge currents up to 3.0 A (100 μs). |
| Low 100 Ω dynamic impedance | Maintains output stability across ±10 % load current changes in feedback networks for DC-DC converters. |
| SOD123F footprint compatibility | Matches industry-standard land pattern (2.8 × 1.6 mm occupied area), enabling drop-in replacement in space-constrained ECUs. |
Applications
| Engine Control Unit (ECU) Reference | Infotainment Power Sequencing |
|---|---|
Use Scenario: Providing stable 9.1 V reference for microcontroller ADC calibration and sensor excitation in gasoline/diesel engine control modules. IC Role / Device Role / Timing Role: Shunt voltage reference establishing precision analog baseline for closed-loop fuel injection timing and knock detection. Use Value: ±1 % tolerance and +3.8 mV/K TC ensure <±15 mV drift over −40 °C to +125 °C ambient, meeting ASIL-B functional safety requirements. |
Use Scenario: Clamping 9.1 V auxiliary rail in head unit power management to prevent overvoltage damage during cold-crank transients. IC Role / Device Role / Timing Role: Overvoltage protection element safeguarding PMIC inputs and display driver ICs during battery voltage spikes. Use Value: 830 mW dissipation and 3.0 A non-repetitive surge rating absorb ISO 7637-2 Pulse 1/2a energy without failure. |
| Body Control Module (BCM) Signal Conditioning | ADAS Camera Interface Protection |
Use Scenario: Regulating 9.1 V supply for LIN bus transceivers and door module window motor drivers. IC Role / Device Role / Timing Role: Local voltage stabilizer ensuring consistent logic-level translation and PWM drive fidelity across varying battery states. Use Value: ≤2 μA leakage at 7.3 V minimizes quiescent current in always-on wake-up circuits, extending sleep-mode battery life. |
Use Scenario: Protecting MIPI CSI-2 receiver inputs against ESD and load-dump-induced surges in surround-view camera modules. IC Role / Device Role / Timing Role: Bidirectional clamp (anode grounded, cathode to signal line) limiting voltage excursion to ±0.9 V forward / +9.2 V reverse. Use Value: 100 Ω rdif and 150 ps response time suppress transients faster than TVS diodes while maintaining signal integrity at 1.5 Gbps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZT52H-B9V1-Q | ±2 % tolerance (9.0–9.4 V range), identical package and thermal specs | Acceptable where tighter regulation not required, e.g., non-critical biasing in lighting control | Select when cost sensitivity outweighs need for ±1 % accuracy in non-safety functions. |
| MMSZ5240B-TP | ±5 % tolerance (8.6–9.6 V), SOD-123 package, 500 mW Ptot, no AEC-Q101 qualification | Limited to consumer or industrial applications without automotive reliability demands | Use only in non-automotive designs where qualification and power margin are not critical. |
Compared with BZT52H-A9V1-QX, the BZT52H-B9V1-Q trades 1 % accuracy for lower cost in automotive contexts, while MMSZ5240B-TP lacks AEC-Q101 validation and thermal robustness-making the original part irreplaceable for ASIL-compliant voltage references.
Availability
BZT52H-A9V1-QX is available at Aetrix Electronics and suitable for automotive engine control units, infotainment power sequencing, and ADAS camera interface protection requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZT52H-A9V1-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, reliable discrete and logic devices for automotive, industrial, and mobile markets.
The BZT52H-Q series belongs to Nexperia's automotive-qualified Zener diode product line, engineered specifically for precision voltage regulation and transient protection in harsh-temperature, high-reliability vehicle subsystems.
FAQ
What is the maximum reverse current the BZT52H-A9V1-QX can handle during a transient event?
The device supports a non-repetitive peak reverse current (IZSM) of 3.0 A for 100 μs pulses at 25 °C ambient, as confirmed in Table 8 of the datasheet. This rating applies under defined test conditions (tp = 100 μs, square wave, Tj = 25 °C prior to surge) and enables robust protection against ISO 7637-2 load-dump events in 12 V automotive systems.
Does the BZT52H-A9V1-QX require external series resistance in standard regulation applications?
Yes-a current-limiting resistor is mandatory to set the operating Zener current between 1 mA and 20 mA. For 9.1 V regulation from a 12 V supply, a 330 Ω resistor establishes ~8.8 mA IZ, staying within the 5–10 mA optimal range for minimal rdif and TC stability, as shown in Figure 7 and Table 8.
How does the temperature coefficient affect regulation accuracy over the full automotive range?
With a measured +3.8 mV/K coefficient at 5 mA, the Zener voltage shifts +342 mV from −40 °C to +125 °C (ΔT = 165 K), resulting in a 9.1 V nominal device operating between 8.76 V and 9.44 V. This 7.5 % total span remains within functional limits for most automotive reference and clamping uses, especially when paired with system-level calibration.
Can the BZT52H-A9V1-QX be used in bidirectional ESD protection configurations?
Yes-when anode is grounded and cathode connected to the protected line, it provides unidirectional clamping at +9.2 V; adding a series Schottky diode enables bidirectional protection down to −0.9 V forward conduction. Its 150 ps response time and low capacitance (<150 pF at 0 V) preserve signal integrity in high-speed interfaces like CAN FD or LIN.
BZT52H-A9V1-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:
- ±1.1%
- 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-A9V1-QX FAQ
1.How can I place an order for BZT52H-A9V1-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52H-A9V1-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-A9V1-QX reliable?
The price and inventory of BZT52H-A9V1-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-A9V1-QX is usually 5 days.
3.What payment methods are accepted for BZT52H-A9V1-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52H-A9V1-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52H-A9V1-QX?
BZT52H-A9V1-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52H-A9V1-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-A9V1-QX?
For technical support, including BZT52H-A9V1-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52H-A9V1-QX requirements.
6.How does Aetrix verify that BZT52H-A9V1-QX is sourced from the original manufacturer or authorized distributors?
All BZT52H-A9V1-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-A9V1-QX meets industry standards.
7.What is the process for return or replacement of BZT52H-A9V1-QX?
All BZT52H-A9V1-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZT52H-A9V1-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-A9V1-QX part is unused and in its original packaging.
Return procedure for BZT52H-A9V1-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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