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Nexperia USA Inc. BZT52H-B75-QX
- Part No.:
- BZT52H-B75-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52H-B75-QX.pdf
- Description:
- DIODE ZENER 75V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:2,447
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Product details
Overview
BZT52H-B75-QX from Nexperia is a 75 V ±2 % 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 = 57 V, used for precision voltage regulation and overvoltage protection in automotive power rails.
For engineers reviewing the BZT52H-B75-QX datasheet, BZT52H-B75-QX pinout, BZT52H-B75-QX application, or BZT52H-B75-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 - all confirmed from Nexperia's official product data sheet Rev. 1 (October 2021).
Technical Context
This device operates as a two-terminal voltage reference diode, conducting in reverse breakdown to clamp voltage at 75 V nominal with ±2 % tolerance across temperature (−65 °C to +150 °C). Its Zener voltage exhibits a positive temperature coefficient of +0.05 mV/K at IZ = 2 mA, enabling stable regulation under varying thermal conditions.
Designed for surface-mount use on FR4 PCBs with single-sided copper, it leverages the SOD123F package's low thermal resistance (Rth(j-sp) = 70 K/W) to sustain 830 mW dissipation when mounted with a 1 cm² cathode pad, while maintaining ≤ 150 °C junction temperature under rated load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 75 V nominal, ±2 % tolerance at IZ = 2 mA - ensures tight regulation accuracy for 72–78 V reference applications. |
| Differential Resistance (rdif) | 400 Ω max at IZ = 2 mA - defines voltage deviation per current change; critical for low-noise, stable regulation. |
| Reverse Current (IR) | 175 μA max at VR = 57 V - confirms low leakage below breakdown, preserving system efficiency in standby modes. |
| Total Power Dissipation (Ptot) | 830 mW at Tamb ≤ 25 °C with 1 cm² cathode pad - sets maximum continuous DC power handling in standard PCB layout. |
| Thermal Resistance (Rth(j-sp)) | 70 K/W - quantifies junction-to-solder-point thermal path; enables accurate thermal design for automotive under-hood environments. |
| Junction Temperature (Tj) | 150 °C max - defines absolute upper operating limit; supports AEC-Q101 qualification for automotive underhood use. |
| AEC-Q101 Qualified | Yes - certified for automotive discrete semiconductor stress testing, including temperature cycling, HTRB, and ESD. |
Pinout & Package
SOD123F plastic surface-mounted package: 2-lead, 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 - must be routed to higher-potential side in shunt regulator configuration. |
| 2 | Anode (A) | Connected to ground or lower-potential reference; completes reverse-bias path during Zener conduction. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q101 qualified - validated for temperature cycling, high-temp reverse bias, and mechanical robustness in automotive ECUs and body control modules. |
| Voltage tolerance options | ±1 %, ±2 %, and ≈±5 % series - BZT52H-B75-QX selects ±2 % for cost-effective precision where 1.5 V regulation window suffices. |
| Thermal performance | Rth(j-sp) = 70 K/W - enables reliable operation up to 830 mW without external heatsinking on standard FR4 PCBs. |
| Low leakage at sub-breakdown | IR ≤ 175 μA at 76 % of VZ - minimizes quiescent current draw in battery-powered systems and sensor front-ends. |
| Wide voltage range coverage | 2.4 V to 75 V in E24 steps - allows single-family sourcing across diverse rail voltages, simplifying BOM management. |
Applications
| Automotive Power Rail Clamp | Industrial Sensor Reference |
|---|---|
Use Scenario: Clamping 12 V/24 V automotive supply transients (load dump, ISO 7637-2 Pulse 5a) in engine control units. IC Role / Device Role / Timing Role: Shunt Zener regulator absorbing surge energy to protect downstream LDOs and microcontrollers. Use Value: Withstands non-repetitive 40 W peak power (100 μs pulse) and maintains 75 V clamping threshold within ±2 % across −40 °C to +125 °C ambient. |
Use Scenario: Providing stable 75 V reference for isolated current sensing in industrial motor drives. IC Role / Device Role / Timing Role: Precision voltage reference for ADC biasing and feedback loop calibration in high-voltage analog front-ends. Use Value: 400 Ω differential resistance and +0.05 mV/K tempco ensure <±0.5 % reference drift over full industrial temperature range (−40 °C to +85 °C). |
| Telecom Line Protection | Medical Equipment Overvoltage Guard |
Use Scenario: Protecting Ethernet PHY interfaces from induced surges on PoE-powered equipment. IC Role / Device Role / Timing Role: Secondary overvoltage clamp after primary TVS, limiting residual voltage to safe levels for PHY ICs. Use Value: Low 175 μA leakage at 57 V prevents signal distortion on idle lines, while 830 mW steady-state rating handles sustained fault currents. |
Use Scenario: Safeguarding patient-connected monitoring circuits against accidental 100 V DC faults in diagnostic devices. IC Role / Device Role / Timing Role: Fail-safe shunt limiter ensuring output never exceeds 78 V (VZ + tolerance) under fault conditions. Use Value: AEC-Q101 qualification correlates with high reliability and low infant mortality - critical for Class II medical device safety compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZT52H-C75-Q | ±5 % tolerance (70–80 V range), higher 400 Ω rdif, same SOD123F package and 830 mW rating | Accepts wider regulation window; suitable for non-critical biasing where cost is prioritized over precision | Select when ±5 % tolerance is acceptable and tighter voltage control is unnecessary for the function. |
| MMSZ5269B-TP | 75 V ±5 %, 500 mW Ptot, SOD-123 package (not SOD123F), Rth(j-a) = 330 K/W | Limited power handling and higher thermal resistance - requires larger copper area or derating for equivalent dissipation | Choose only if legacy MMSZ footprint compatibility is required; not recommended for new automotive designs due to lower power and no AEC-Q101 rating. |
Compared with BZT52H-B75-QX, the C75 variant trades voltage precision for cost, while MMSZ5269B-TP lacks automotive qualification and thermal performance - making BZT52H-B75-QX the optimal choice for AEC-Q101-compliant, 75 V ±2 % regulation where reliability and thermal margin are critical.
Availability
BZT52H-B75-QX is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor signal conditioning, telecom line protection, and medical equipment overvoltage guard circuits requiring stable component supply with guaranteed long-term continuity.
Supply support for BZT52H-B75-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, analog, and discrete components, with leadership in automotive-qualified parts and efficient manufacturing.
The BZT52H-Q series belongs to Nexperia's automotive-grade Zener diode product line, engineered specifically for robust voltage regulation and transient suppression in harsh-temperature automotive and industrial environments.
FAQ
What is the maximum continuous reverse current the BZT52H-B75-QX can handle at 25 °C?
The device is rated for 830 mW total power dissipation at Tamb ≤ 25 °C with proper PCB mounting (1 cm² cathode pad). At 75 V Zener voltage, this corresponds to a maximum continuous reverse current of 11.1 mA (830 mW ÷ 75 V), assuming ideal thermal conditions and negligible forward drop.
Does the BZT52H-B75-QX meet AEC-Q101 requirements for automotive use?
Yes - the BZT52H-B75-QX is explicitly qualified to AEC-Q101 Rev. D, covering stress tests including high-temperature reverse bias (HTRB), temperature cycling, and ESD (HBM ≥ 2 kV). This certification is documented in Section 11 of the official Nexperia data sheet Rev. 1 (October 2021).
How does the SOD123F package differ from standard SOD-123 in thermal performance?
The SOD123F features flattened leads that improve solder joint reliability and reduce thermal resistance to the PCB. Its Rth(j-sp) is 70 K/W versus ~100 K/W for standard SOD-123, enabling 830 mW dissipation with a 1 cm² cathode pad - a 20 % improvement critical for automotive thermal margins.
Can the BZT52H-B75-QX be used in parallel for higher power handling?
No - Zener diodes exhibit negative temperature coefficients at low voltages but positive above ~5.6 V; the BZT52H-B75-QX has +0.05 mV/K, causing current hogging if paralleled without individual ballast resistors. For >830 mW, use a single higher-rated device or active regulation instead.
BZT52H-B75-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:
- ±2%
- 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-B75-QX FAQ
1.How can I place an order for BZT52H-B75-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52H-B75-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-B75-QX reliable?
The price and inventory of BZT52H-B75-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-B75-QX is usually 5 days.
3.What payment methods are accepted for BZT52H-B75-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52H-B75-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52H-B75-QX?
BZT52H-B75-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52H-B75-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-B75-QX?
For technical support, including BZT52H-B75-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52H-B75-QX requirements.
6.How does Aetrix verify that BZT52H-B75-QX is sourced from the original manufacturer or authorized distributors?
All BZT52H-B75-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-B75-QX meets industry standards.
7.What is the process for return or replacement of BZT52H-B75-QX?
All BZT52H-B75-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZT52H-B75-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-B75-QX part is unused and in its original packaging.
Return procedure for BZT52H-B75-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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