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Nexperia USA Inc. BZT52H-A75-QX
- Part No.:
- BZT52H-A75-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52H-A75-QX.pdf
- Description:
- DIODE ZENER 75V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:2,680
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Product details
Overview
BZT52H-A75-QX from Nexperia is a 75 V ±1 % tolerance Zener diode in SOD123F package, rated for 830 mW total power dissipation at 25 °C ambient, with 400 Ω typical differential resistance at IZ = 2 mA and 175 μA reverse current at VR = 57 V, used for precision voltage regulation in automotive power supply monitoring circuits.
For engineers reviewing the BZT52H-A75-QX datasheet, BZT52H-A75-QX pinout, BZT52H-A75-QX application, or BZT52H-A75-QX equivalent, this page delivers verified Zener voltage, thermal resistance (Rth(j-sp) = 70 K/W), non-repetitive peak reverse current (0.20 A), temperature coefficient (+52.5 mV/K), and AEC-Q101 qualification status - all critical for automotive-grade overvoltage clamping and reference design.
Technical Context
This Zener diode operates in reverse breakdown mode with a nominal 75 V regulation voltage at 2 mA test current, exhibiting a positive temperature coefficient of +52.5 mV/K and 400 Ω differential resistance - enabling stable reference generation under varying thermal loads in engine control units.
Designed for surface-mount use on FR4 PCBs with single-sided copper and tin-plated pads, it supports 150 °C maximum junction temperature and achieves Rth(j-a) = 330 K/W in free air and Rth(j-sp) = 70 K/W to cathode solder point - key for thermal management in compact automotive modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 74.25 V to 75.75 V at IZ = 2 mA - defines tight 75 V regulation window for accurate overvoltage detection. |
| Tolerance | ±1 % - ensures minimal unit-to-unit variation in voltage reference applications. |
| Differential Resistance (rdif) | 400 Ω max at IZ = 2 mA - determines output impedance and load regulation sensitivity. |
| Reverse Current (IR) | 175 μA max at VR = 57 V - quantifies leakage under sub-breakdown conditions for low-power standby circuits. |
| Total Power Dissipation (Ptot) | 830 mW at Tamb ≤ 25 °C - sets maximum continuous DC power handling on standard FR4 layout. |
| Non-repetitive Peak Reverse Current (IZSM) | 0.20 A at tp = 100 μs - defines surge capability for transient voltage suppression. |
| Junction Temperature (Tj) | −65 °C to +150 °C - enables operation in under-hood automotive environments. |
Pinout & Package
SOD123F plastic surface-mounted package: 2-lead, small flat lead outline measuring 3.6 mm × 1.7 mm × 1.0 mm (L × W × H), with cathode marked by a bar on the device body.
| 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 lower-potential rail; reverse-biased configuration establishes Zener breakdown. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Qualified for automotive applications per Stress Test Qualification for Discrete Semiconductors - ensures reliability in harsh vehicle environments. |
| Three tolerance options | ±1 % (A-series), ±2 % (B-series), ~±5 % (C-series) - allows selection based on system accuracy requirements without redesign. |
| Thermal resistance to solder point | Rth(j-sp) = 70 K/W - enables effective heat transfer from junction to PCB copper via cathode pad, critical for sustained power handling. |
| Wide voltage range | 2.4 V to 75 V in E24 steps - supports standardized voltage reference needs across multiple subsystems (e.g., 5 V, 12 V, 48 V, 75 V rails). |
| Pulse surge capability | 40 W non-repetitive peak reverse power at tp = 100 μs - provides transient immunity against load dump or inductive switching events. |
Applications
| Engine Control Unit (ECU) Reference | Infotainment Power Monitor |
|---|---|
|
Use Scenario: Stable 75 V reference for ADC input in high-side battery voltage sensing circuitry. IC Role / Device Role / Timing Role: Zener voltage reference providing known threshold for microcontroller analog input scaling. Use Value: ±1 % tolerance ensures <±0.75 V absolute error in 75 V measurement, meeting ASIL-B diagnostic accuracy requirements. |
Use Scenario: Overvoltage clamp on 12 V supply rail feeding display backlight driver ICs. IC Role / Device Role / Timing Role: Shunt regulator absorbing excess energy during load dump transients. Use Value: 0.20 A non-repetitive peak reverse current handles ISO 7637-2 Pulse 5a surges without degradation. |
| ADAS Camera Module Bias | Electric Power Steering (EPS) Sensor Supply |
|
Use Scenario: Precision bias voltage generation for CMOS image sensor analog front-end. IC Role / Device Role / Timing Role: Low-noise voltage reference stabilizing sensor supply under thermal cycling. Use Value: +52.5 mV/K temperature coefficient enables predictable drift compensation in closed-loop calibration algorithms. |
Use Scenario: Regulated 5 V supply for Hall-effect position sensors in motor feedback loop. IC Role / Device Role / Timing Role: Secondary shunt regulator backing up primary LDO in safety-critical path. Use Value: AEC-Q101 qualification and 150 °C junction rating ensure functional safety compliance per ISO 26262. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZT52H-B75-Q | ±2 % tolerance (73.5 V–76.5 V), same SOD123F package and 830 mW rating | Lower accuracy acceptable in non-critical biasing where cost reduction is prioritized | Select when ±2 % regulation window suffices and bill-of-materials cost optimization is required. |
| MMBZ5275B-7-F | 75 V ±5 %, SOT-23 package, 350 mW Ptot, not AEC-Q101 qualified | General-purpose industrial use only; unsuitable for automotive due to lack of qualification and lower power rating | Choose only for non-automotive prototypes or cost-sensitive consumer designs where qualification is not mandated. |
Compared with BZT52H-A75-QX, the BZT52H-B75-Q trades 1 % accuracy for broader tolerance at identical thermal and surge performance, while MMBZ5275B-7-F sacrifices AEC-Q101 compliance and 480 mW power headroom - making the A-series part uniquely suited for production automotive voltage reference functions requiring both precision and qualification.
Availability
BZT52H-A75-QX is available at Aetrix Electronics and suitable for automotive ECU reference design, ADAS camera biasing, and electric power steering sensor supply applications requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for BZT52H-A75-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 and reliability, delivering high-performance logic, discrete, and MOSFET solutions for automotive, industrial, and mobile markets.
The BZT52H-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for automotive voltage regulation, reference, and overvoltage protection in space-constrained, thermally demanding environments.
FAQ
What is the maximum continuous power dissipation for BZT52H-A75-QX at 85 °C ambient?
At 85 °C ambient, derating applies: Ptot = 830 mW − [(85 − 25) °C × (830 mW / (150 − 25) °C)] = 830 mW − 398 mW = 432 mW. This value assumes mounting on FR4 PCB with 1 cm² cathode pad per datasheet condition [3], and must be validated with actual board thermal design.
Is BZT52H-A75-QX suitable for bidirectional transient voltage suppression?
No - it is a unidirectional Zener diode optimized for reverse-bias regulation only. Forward conduction is limited to 0.9 V at 10 mA (VF), and it lacks symmetrical clamping characteristics. For bidirectional TVS, use dedicated devices like PESD5V0S1BA or similar automotive-grade TVS arrays.
How does the +52.5 mV/K temperature coefficient impact circuit stability?
The positive coefficient means VZ increases by 52.5 mV per 1 K rise in junction temperature. In a 75 V reference, this yields ~3.9 V drift over 75 K (e.g., −40 °C to +35 °C ambient). Compensation requires either matched negative-coefficient components or software-based calibration - not inherent to the diode itself.
Can BZT52H-A75-QX replace older BZT52C75 in existing designs?
Yes, with caveats: BZT52H-A75-QX offers tighter ±1 % tolerance vs. BZT52C75's ~±5 %, improved thermal resistance (70 K/W vs. ~120 K/W), and AEC-Q101 qualification. Layout remains compatible (both SOD123F), but verify that reduced tolerance doesn't cause over-regulation in marginally designed circuits.
BZT52H-A75-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):
- 75 V
- Tolerance:
- ±1%
- Power - Max:
- 375 mW
- Impedance (Max) (Zzt):
- 175 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 52.5 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-A75-QX FAQ
1.How can I place an order for BZT52H-A75-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52H-A75-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-A75-QX reliable?
The price and inventory of BZT52H-A75-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-A75-QX is usually 5 days.
3.What payment methods are accepted for BZT52H-A75-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52H-A75-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52H-A75-QX?
BZT52H-A75-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52H-A75-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-A75-QX?
For technical support, including BZT52H-A75-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52H-A75-QX requirements.
6.How does Aetrix verify that BZT52H-A75-QX is sourced from the original manufacturer or authorized distributors?
All BZT52H-A75-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-A75-QX meets industry standards.
7.What is the process for return or replacement of BZT52H-A75-QX?
All BZT52H-A75-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZT52H-A75-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-A75-QX part is unused and in its original packaging.
Return procedure for BZT52H-A75-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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