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Nexperia USA Inc. BZT52H-C33-QX
- Part No.:
- BZT52H-C33-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52H-C33-QX.pdf
- Description:
- DIODE ZENER 33V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:9,764
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Product details
Overview
BZT52H-C33-QX from Nexperia is a ±5 % tolerance Zener diode in SOD123F package, rated for 33 V nominal breakdown voltage at IZ = 2 mA, with 830 mW total power dissipation and AEC-Q101 qualification for automotive voltage regulation. It provides stable reference voltage in low-power biasing, overvoltage clamping, and supply rail stabilization circuits.
For engineers reviewing the BZT52H-C33-QX datasheet, BZT52H-C33-QX pinout, BZT52H-C33-QX application, or BZT52H-C33-QX equivalent, key selection criteria include Zener voltage tolerance (±5 %), thermal resistance (150 K/W junction-to-solder-point), differential resistance (250 Ω max), reverse current (40 μA max at VR = 27 V), and automotive-grade reliability per AEC-Q101.
Technical Context
This Zener diode operates in reverse-biased breakdown mode to maintain a stable 33 V reference across its terminals under controlled current conditions. Its design supports precise DC voltage regulation in space-constrained SMD layouts where thermal performance and long-term stability are critical.
It features a temperature coefficient of +0.05 mV/K at IZ = 2 mA, indicating minimal drift over temperature, and exhibits 45 pF capacitance at 1 MHz and 0 V reverse bias-suitable for low-frequency regulation without signal coupling concerns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 33 V nominal at IZ = 2 mA; actual range 31.0–35.0 V due to ±5 % tolerance-defines regulated output level in feedback or clamp circuits. |
| Differential Resistance (rdif) | ≤250 Ω at IZ = 2 mA; determines regulation stiffness-lower values yield tighter voltage control under load variation. |
| Reverse Current (IR) | ≤40 μA at VR = 27 V; ensures low leakage during standby, critical for battery-powered or high-impedance bias networks. |
| Total Power Dissipation (Ptot) | 830 mW at Tamb ≤ 25 °C on FR4 PCB with 1 cm² cathode pad; sets maximum continuous DC power handling before thermal derating. |
| Junction Temperature (Tj) | −65 °C to +150 °C operating range; enables deployment in under-hood automotive environments and industrial control enclosures. |
| AEC-Q101 Qualification | Qualified per Automotive Electronics Council stress test standard-confirms reliability for safety-relevant and mission-critical automotive subsystems. |
Pinout & Package
SOD123F surface-mount plastic package: 2-terminal, flat lead, small outline; dimensions 3.6 mm × 1.7 mm × 1.0 mm (L × W × H); cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; polarity-sensitive terminal-reverse bias applied between anode and cathode to initiate Zener conduction. |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes bias path-current flows from cathode to anode during regulation. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q101 qualified-enables use in engine control units, body electronics, and ADAS modules without additional qualification effort. |
| Thermal resistance (junction-to-solder-point) | 150 K/W-supports reliable operation with moderate copper pour, reducing need for oversized thermal pads in compact PCBs. |
| Non-repetitive peak reverse current | 0.9 A at tp = 100 μs-provides transient overvoltage immunity against ESD or load dump spikes in 12 V systems. |
| Forward voltage | ≤0.9 V at IF = 10 mA-minimizes forward conduction loss when used bidirectionally or in protection configurations. |
| Marking code | "BW" per Table 4-enables visual identification on board and traceability to BZT52H-C33-Q series with ±5 % tolerance. |
Applications
| Engine Control Unit (ECU) Reference | Infotainment Power Rail Clamp |
|---|---|
Use Scenario: Stabilizing 5 V microcontroller reference voltage in engine management systems exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Zener diode providing precision DC reference for ADC biasing and sensor signal conditioning. Use Value: ±5 % tolerance and +0.05 mV/K tempco ensure <±150 mV drift over −40 °C to +125 °C, meeting ASIL-B functional accuracy requirements. |
Use Scenario: Clamping 12 V supply rail against load dump transients in automotive infotainment head units. IC Role / Device Role / Timing Role: Standby shunt regulator absorbing surge energy during alternator disconnection events. Use Value: 0.9 A non-repetitive peak reverse current rating handles ISO 7637-2 Pulse 5a surges without degradation. |
| Body Control Module (BCM) Bias Network | ADAS Camera Power Sequencing |
Use Scenario: Generating stable 3.3 V bias for CAN transceiver termination resistors in door module controllers. IC Role / Device Role / Timing Role: Low-leakage Zener establishing reference potential for passive biasing networks. Use Value: ≤40 μA reverse current at 27 V ensures <1 μA error contribution in high-impedance 100 kΩ bias dividers. |
Use Scenario: Regulating auxiliary 3.3 V rail for image sensor startup sequencing in surround-view camera modules. IC Role / Device Role / Timing Role: Precision voltage reference enabling accurate power-on reset timing and analog front-end calibration. Use Value: 33 V Zener voltage allows use with simple resistor divider to generate exact 3.3 V via 10:1 ratio, leveraging tight ±5 % tolerance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZT52H-B33-Q | ±2 % tolerance (32.3–33.7 V), lower rdif (≤150 Ω), same SOD123F package and AEC-Q101 rating | Better regulation accuracy and lower dynamic impedance-preferred where tighter voltage control is required | Select when system-level voltage tolerance demands <±1 % deviation at operating current |
| MMSZ5257ET1G | ±5 % tolerance (31.35–34.65 V), 500 mW Ptot, SOD-123 package, AEC-Q101 qualified | Lower power rating and higher thermal resistance-limits continuous current in high-ambient designs | Choose only if legacy BOM compatibility or dual-sourcing mandates ON Semiconductor footprint |
Compared with BZT52H-C33-QX, the BZT52H-B33-Q offers superior voltage precision and regulation stiffness at identical thermal and automotive qualifications, while MMSZ5257ET1G trades power capability and thermal performance for second-source availability in cost-sensitive programs.
Availability
BZT52H-C33-QX is available at Aetrix Electronics and suitable for automotive engine control units, infotainment power clamping, and body control module bias networks requiring stable component supply with full AEC-Q101 traceability and extended temperature support.
Supply support for BZT52H-C33-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 consumer markets.
The BZT52H-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for robust voltage reference and transient suppression in harsh automotive environments.
FAQ
What is the maximum continuous Zener current for BZT52H-C33-QX at 85 °C ambient?
At Tamb = 85 °C, derating applies: Ptot reduces linearly from 830 mW at 25 °C to zero at 150 °C. At 85 °C, allowable power is 550 mW. With VZ ≈ 33 V, maximum continuous IZ is ~16.7 mA-calculated as 550 mW ÷ 33 V, assuming worst-case voltage and no additional thermal margin.
Does BZT52H-C33-QX support bidirectional ESD protection?
No-BZT52H-C33-QX is a unidirectional Zener diode optimized for reverse-bias regulation. Its forward voltage is 0.9 V at 10 mA, but it lacks symmetric clamping characteristics or specified ESD ratings (e.g., IEC 61000-4-2). For bidirectional ESD protection, dedicated TVS diodes like PESD5V0S1BA should be used instead.
How does the ±5 % tolerance affect regulation accuracy in a 33 V reference circuit?
The ±5 % tolerance means VZ ranges from 31.0 V to 35.0 V at IZ = 2 mA. In a resistor-fed reference, this directly sets absolute output uncertainty. For example, with a 10 kΩ series resistor and 40 V supply, output varies from 31.0 V to 35.0 V-±2 V absolute error-requiring downstream trimming or calibration if tighter regulation is needed.
Can BZT52H-C33-QX replace BZT52C33 in non-automotive designs?
Yes-BZT52H-C33-QX shares identical electrical specs (33 V, ±5 %, SOD123F) with BZT52C33 but adds AEC-Q101 qualification and enhanced process controls. In non-automotive applications, it delivers identical regulation performance with higher reliability assurance, though at a modest cost premium justified only where long-term stability or extended temperature operation is critical.
BZT52H-C33-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):
- 33 V
- Tolerance:
- ±6.06%
- Power - Max:
- 375 mW
- Impedance (Max) (Zzt):
- 40 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 23.1 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-C33-QX FAQ
1.How can I place an order for BZT52H-C33-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52H-C33-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-C33-QX reliable?
The price and inventory of BZT52H-C33-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-C33-QX is usually 5 days.
3.What payment methods are accepted for BZT52H-C33-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52H-C33-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52H-C33-QX?
BZT52H-C33-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52H-C33-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-C33-QX?
For technical support, including BZT52H-C33-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52H-C33-QX requirements.
6.How does Aetrix verify that BZT52H-C33-QX is sourced from the original manufacturer or authorized distributors?
All BZT52H-C33-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-C33-QX meets industry standards.
7.What is the process for return or replacement of BZT52H-C33-QX?
All BZT52H-C33-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZT52H-C33-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-C33-QX part is unused and in its original packaging.
Return procedure for BZT52H-C33-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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