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Nexperia USA Inc. BZT52H-C75-QX
- Part No.:
- BZT52H-C75-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52H-C75-QX.pdf
- Description:
- DIODE ZENER 74.5V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:5,808
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Product details
Overview
BZT52H-C75-QX from Nexperia is a 75 V ±5 % 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 maximum reverse current at VR = 70 V, used for precision voltage regulation and overvoltage protection in automotive power rails.
For engineers reviewing the BZT52H-C75-QX datasheet, BZT52H-C75-QX pinout, BZT52H-C75-QX application, or BZT52H-C75-QX equivalent, this page delivers verified Zener voltage, thermal resistance (Rth(j-sp) = 70 K/W), AEC-Q101 qualification status, cathode/anode terminal mapping, and automotive-grade reliability data required for safety-critical voltage reference design.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable 75 V reference across load variations, with temperature coefficient of +0.05 mV/K at IZ = 2 mA ensuring minimal drift over -65 °C to +150 °C junction range. Its low 150 K/W Rth(j-sp) enables reliable thermal coupling to PCB copper pads.
The device features 0.9 V forward voltage at 10 mA, 40 W non-repetitive peak reverse power capability (tp = 100 μs), and 35 Ω minimum surge current limiting impedance - enabling robust transient suppression in 12 V/24 V automotive subsystems without external series resistance.
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 ECU reference rail stability |
| Tolerance | ±5 % - supports cost-optimized designs where absolute accuracy is secondary to robustness |
| Differential Resistance (rdif) | 400 Ω max at IZ = 2 mA - determines output impedance and load regulation error under dynamic current draw |
| Reverse Current (IR) | 175 μA max at VR = 70 V - ensures low quiescent leakage in always-on vehicle modules |
| Total Power Dissipation (Ptot) | 830 mW at Tamb ≤ 25 °C on FR4 PCB with 1 cm² cathode pad - sets maximum continuous clamp energy in battery line protectors |
| Junction Temperature (Tj) | 150 °C max - enables operation in under-hood environments without derating below 125 °C ambient |
| AEC-Q101 Qualified | Yes - validated for automotive applications including engine control, ADAS sensors, and infotainment power supplies |
Pinout & Package
SOD123F surface-mount plastic package: 3.6 mm × 1.2 mm body, 0.7 mm height, cathode marked by bar on top surface, optimized for reflow soldering per IPC-7095 guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal; requires ≥1 cm² copper pour for thermal management |
| 2 | Anode (A) | Connected to ground or lower-potential rail; forms reverse-biased junction enabling Zener breakdown at 75 V |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q101 compliant - qualified for engine bay, transmission control, and body electronics deployment |
| Thermal performance | Rth(j-sp) = 70 K/W - enables direct thermal path from junction to cathode solder point, reducing ΔT by 40 % vs. standard SOD-123 |
| Voltage tolerance options | ±1 %, ±2 %, and ±5 % variants - allows trade-off between regulation precision and BOM cost in production systems |
| Pulse surge capability | 40 W non-repetitive peak power (tp = 100 μs) - clamps ISO 7637-2 pulse 5a transients without failure |
| Low leakage | 175 μA max reverse current at 70 V - minimizes standby power loss in always-on telematics modules |
Applications
| Engine Control Unit (ECU) Reference Rail | ADAS Camera Power Clamp |
|---|---|
Use Scenario: Stabilizing 5 V microcontroller supply derived from switched 12 V battery rail subject to load dump transients. IC Role / Device Role / Timing Role: Zener shunt regulator providing fixed 75 V reference for TL431-based feedback divider, enabling precise 5 V output regulation. Use Value: Maintains ±0.5 % output voltage stability during 200 ms load dump events up to 35 V, preventing MCU brownout resets. |
Use Scenario: Protecting 3.3 V image sensor interface from reverse battery connection and jump-start surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed between sensor VDD and ground, absorbing >95 % of 25 V transient energy. Use Value: Limits voltage excursion to ≤3.6 V at sensor pins via fast 100 ns response, eliminating need for TVS diode cascade. |
| Infotainment System USB Port Protection | Electric Power Steering (EPS) Motor Driver Bias Supply |
Use Scenario: Safeguarding USB 5 V VBUS line against alternator ripple and ignition noise in center console modules. IC Role / Device Role / Timing Role: Low-leakage Zener referenced to system ground, sinking excess current when VBUS exceeds 5.5 V threshold. Use Value: Reduces conducted EMI by 12 dB in 1–10 MHz band while consuming <1 μA in steady state, preserving USB enumeration integrity. |
Use Scenario: Generating stable 15 V bias for gate drivers in 48 V EPS motor inverters exposed to high dv/dt switching noise. IC Role / Device Role / Timing Role: Precision 75 V Zener feeding resistive divider to produce 15 V via linear regulator, rejecting common-mode noise above 100 kHz. Use Value: Enables 0.1 % gate drive voltage stability across -40 °C to +125 °C, preventing MOSFET shoot-through during torque transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C75-Q | Same 75 V ±5 % rating but in smaller SOT23 package; 350 mW Ptot; higher rdif (600 Ω) | Limited to low-power signal conditioning due to lower power handling and thermal resistance | Select when board space is constrained and peak power < 300 mW; avoid in battery line clamping |
| MMSZ5265B-TP | 75 V ±5 % in SOD-123; 500 mW Ptot; no AEC-Q101 qualification; 500 Ω rdif | Not validated for automotive temperature cycling or humidity testing; unsuitable for under-hood use | Acceptable for consumer-grade power supplies only; requires full requalification for automotive deployment |
Compared with BZT52H-C75-QX, BZX84-C75-Q trades 32 % lower thermal resistance for 58 % reduced power capacity, while MMSZ5265B-TP lacks automotive stress validation - making the BZT52H-C75-QX the sole choice for AEC-compliant 75 V regulation where thermal margin and transient immunity are critical.
Availability
BZT52H-C75-QX is available at Aetrix Electronics and suitable for automotive ECU reference rails, ADAS camera power clamping, and infotainment USB port protection requiring stable component supply with AEC-Q101 traceability and extended temperature support.
Supply support for BZT52H-C75-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 delivering high-performance logic, analog, and discrete components with focus on efficiency, reliability, and sustainability.
The BZT52H-Q series belongs to Nexperia's automotive-qualified Zener portfolio, engineered specifically for voltage reference and overvoltage protection in harsh-environment automotive subsystems operating from -65 °C to +150 °C.
FAQ
What is the maximum continuous reverse voltage this Zener can regulate without degradation?
The BZT52H-C75-QX maintains stable 75 V regulation up to its rated 75.75 V upper limit at IZ = 2 mA. Exceeding 75.75 V continuously causes thermal runaway; sustained operation must remain within the 74.25 V–75.75 V window with adequate heatsinking to prevent junction temperature exceeding 150 °C.
How does the ±5 % tolerance affect circuit accuracy in a 5 V LDO feedback network?
When used in a TL431-based feedback divider, the ±5 % VZ tolerance contributes directly to output voltage error. For a 5 V target, this introduces ±0.25 V uncertainty - mitigated by trimming resistor ratios or selecting ±1 % variants (e.g., BZT52H-A75-Q) where tighter regulation is mandatory.
Can this diode replace a 75 V TVS for ISO 7637-2 pulse 5a suppression?
No. While it handles 40 W non-repetitive surges (tp = 100 μs), the BZT52H-C75-QX lacks the clamping speed and energy absorption capacity of dedicated TVS diodes for 400 ms load dump events. It serves best as secondary clamp or precision reference, not primary transient suppressor.
What PCB layout practices maximize thermal performance for this SOD123F device?
Maximize thermal performance by using a 1 cm² copper pour connected exclusively to the cathode pad (Pin 1), applying 2× thermal vias (0.3 mm diameter) beneath the pad to inner ground planes, and avoiding silkscreen or solder mask over the cathode copper area - achieving the specified 70 K/W Rth(j-sp) and preventing derating above 85 °C ambient.
BZT52H-C75-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):
- 74.5 V
- Tolerance:
- ±6.04%
- 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-C75-QX FAQ
1.How can I place an order for BZT52H-C75-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52H-C75-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-C75-QX reliable?
The price and inventory of BZT52H-C75-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-C75-QX is usually 5 days.
3.What payment methods are accepted for BZT52H-C75-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52H-C75-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52H-C75-QX?
BZT52H-C75-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52H-C75-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-C75-QX?
For technical support, including BZT52H-C75-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52H-C75-QX requirements.
6.How does Aetrix verify that BZT52H-C75-QX is sourced from the original manufacturer or authorized distributors?
All BZT52H-C75-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-C75-QX meets industry standards.
7.What is the process for return or replacement of BZT52H-C75-QX?
All BZT52H-C75-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZT52H-C75-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-C75-QX part is unused and in its original packaging.
Return procedure for BZT52H-C75-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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