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Nexperia USA Inc. BZT52H-C4V7-QX
- Part No.:
- BZT52H-C4V7-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52H-C4V7-QX.pdf
- Description:
- DIODE ZENER 4.7V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:2,450
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Product details
Overview
BZT52H-C4V7-QX from Nexperia is a ±5 % tolerance Zener diode in SOD123F package, rated for 4.4 V to 5.0 V breakdown voltage at 5 mA, with 78 Ω typical differential resistance and 3 μA reverse current at 3.5 V, used for precision voltage reference and overvoltage protection in automotive power rails.
For engineers reviewing the BZT52H-C4V7-QX datasheet, BZT52H-C4V7-QX pinout, BZT52H-C4V7-QX application, or BZT52H-C4V7-QX equivalent, this page delivers verified Zener voltage tolerance, thermal resistance (Rth(j-sp) = 150 K/W), AEC-Q101 qualification status, and automotive-grade derating guidance - all critical for ECU and ADAS subsystem design.
Technical Context
This Zener diode operates in reverse-biased breakdown mode with a nominal 4.7 V regulation point, optimized for stable DC voltage clamping under transient load conditions. Its ±5 % tolerance band and low 3 μA IR at VR = 3.5 V enable predictable threshold behavior in feedback loops and protection circuits.
The device uses silicon planar technology with cathode-anode polarity defined by a marking bar on the SOD123F body. Junction-to-solder-point thermal resistance of 150 K/W supports reliable operation up to 150 °C junction temperature when mounted per recommended footprint.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.4 V to 5.0 V at IZ = 5 mA - defines clamping range for 5 V rail stabilization |
| Tolerance | ±5 % - enables cost-effective selection where tight regulation is not required |
| Differential Resistance (rdif) | 78 Ω typical - determines output impedance and load regulation error |
| Reverse Current (IR) | 3 μA max at VR = 3.5 V - ensures minimal leakage in standby mode |
| Total Power Dissipation (Ptot) | 830 mW at Tamb ≤ 25 °C - sets maximum continuous power handling on standard FR4 PCB |
| Junction Temperature (Tj) | 150 °C max - defines upper thermal limit for automotive under-hood deployment |
| AEC-Q101 Qualified | Yes - validated for automotive discrete semiconductor stress testing including HTGB, HTRB, and temperature cycling |
Pinout & Package
SOD123F surface-mount plastic package: 2-lead, flat lead, small outline; dimensions 3.5 mm × 1.6 mm × 1.1 mm (L × W × H); cathode marked by bar on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal |
| 2 | Anode (A) | Connected to ground or lower-potential reference; reverse bias applied across K–A |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive use including high-temperature bias life and mechanical shock tests |
| Thermal resistance (Rth(j-sp)) | 150 K/W - enables direct thermal coupling to PCB copper for improved power handling |
| Low leakage current | 3 μA max at 3.5 V reverse bias - minimizes quiescent current in always-on systems |
| Stable temperature coefficient | −3.5 to +0.2 mV/K - ensures predictable VZ drift across −65 °C to +150 °C ambient |
| Non-repetitive surge rating | 6.0 A peak reverse current (tp = 100 μs) - supports transient overvoltage suppression |
Applications
| Engine Control Unit (ECU) Reference | ADAS Camera Power Clamp |
|---|---|
Use Scenario: Stabilizing 5 V supply for microcontroller ADC reference in engine control modules. IC Role / Device Role / Timing Role: Zener diode provides fixed voltage reference point for analog sensing circuitry. Use Value: ±5 % tolerance and 78 Ω rdif ensure <10 mV reference shift under 10 mA load variation, meeting ASIL-B sensor accuracy requirements. |
Use Scenario: Clamping 5 V camera module power input against load dump transients in rear-view systems. IC Role / Device Role / Timing Role: Reverse-biased Zener shunts excess energy during ISO 7637-2 Pulse 5a events. Use Value: 6.0 A non-repetitive surge rating and 830 mW Ptot allow safe dissipation of 40 W peak pulses without degradation. |
| Infotainment System Reset Circuit | Body Control Module (BCM) Voltage Monitor |
Use Scenario: Generating clean reset signal when 5 V rail drops below 4.3 V during cold-crank conditions. IC Role / Device Role / Timing Role: Zener-based comparator threshold element detecting undervoltage condition. Use Value: 3 μA reverse current at 3.5 V ensures negligible loading on weak battery-sourced rails during cranking. |
Use Scenario: Monitoring 12 V battery-derived 5 V supply for brownout detection in door module logic. IC Role / Device Role / Timing Role: Precision voltage reference for window comparator input stage. Use Value: −3.5 to +0.2 mV/K temperature coefficient limits VZ drift to ±15 mV over −40 °C to +105 °C operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZT52C4V7 | Same VZ and tolerance, but not AEC-Q101 qualified; Rth(j-sp) = 170 K/W | Limited to industrial or consumer designs without automotive reliability requirements | Select when cost sensitivity outweighs automotive qualification needs and thermal margin permits higher Rth |
| MMSZ4705T1G | 4.7 V ±5 %, SOD-123 package, but only 500 mW Ptot and no AEC-Q101 certification | Suitable for low-power portable electronics, not for under-hood automotive environments | Choose only for space-constrained non-automotive designs where 830 mW derating is unnecessary |
Compared with BZT52H-C4V7-QX, BZT52C4V7 offers identical electrical specs but lacks automotive qualification and has higher thermal resistance, while MMSZ4705T1G reduces power capability by 40 % and omits AEC-Q101 validation - making the QX variant the sole choice for thermally demanding, safety-critical automotive voltage regulation.
Availability
BZT52H-C4V7-QX is available at Aetrix Electronics and suitable for engine control units, ADAS camera modules, infotainment reset circuits, and body control modules requiring stable component supply with full traceability and automotive-grade compliance.
Supply support for BZT52H-C4V7-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, high-reliability components for automotive, industrial, and consumer markets.
The BZT52H-Q series belongs to Nexperia's automotive-qualified Zener diode product line, engineered specifically for robust voltage regulation and transient suppression in harsh-temperature vehicle subsystems.
FAQ
What is the maximum continuous reverse current the BZT52H-C4V7-QX can handle at 25 °C ambient?
The device supports up to 250 mA forward current, but as a Zener diode, its continuous reverse current is limited by power dissipation. At 25 °C ambient and 4.7 V breakdown, the maximum steady-state reverse current is approximately 176 mA (830 mW ÷ 4.7 V), assuming ideal thermal conditions and no derating.
How does the ±5 % tolerance affect regulation accuracy in a 5 V power rail?
With a nominal 4.7 V Zener voltage and ±5 % tolerance, the actual breakdown occurs between 4.4 V and 5.0 V. In a 5 V rail clamp configuration, this means the protected node will be held within that band - acceptable for non-critical logic supplies but insufficient for precision analog references requiring tighter than ±2 %.
Can BZT52H-C4V7-QX replace BZT52C4V7 in an existing automotive design?
Yes, electrically it is a drop-in replacement with identical VZ, tolerance, and package. However, BZT52H-C4V7-QX adds AEC-Q101 qualification and lower Rth(j-sp) (150 vs. 170 K/W), enabling higher reliability and better thermal performance in automotive environments without layout changes.
What is the significance of the 'QX' suffix in the part number?
The 'QX' suffix denotes Nexperia's automotive-qualified version of the BZT52H-C4V7 part, indicating full AEC-Q101 compliance, extended temperature range (−65 °C to +150 °C), and traceable manufacturing per IATF 16949 - distinguishing it from commercial-grade variants like BZT52C4V7.
BZT52H-C4V7-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):
- 4.7 V
- Tolerance:
- ±6.38%
- Power - Max:
- 375 mW
- Impedance (Max) (Zzt):
- 78 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 2 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-C4V7-QX FAQ
1.How can I place an order for BZT52H-C4V7-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52H-C4V7-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-C4V7-QX reliable?
The price and inventory of BZT52H-C4V7-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-C4V7-QX is usually 5 days.
3.What payment methods are accepted for BZT52H-C4V7-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52H-C4V7-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52H-C4V7-QX?
BZT52H-C4V7-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52H-C4V7-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-C4V7-QX?
For technical support, including BZT52H-C4V7-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52H-C4V7-QX requirements.
6.How does Aetrix verify that BZT52H-C4V7-QX is sourced from the original manufacturer or authorized distributors?
All BZT52H-C4V7-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-C4V7-QX meets industry standards.
7.What is the process for return or replacement of BZT52H-C4V7-QX?
All BZT52H-C4V7-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZT52H-C4V7-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-C4V7-QX part is unused and in its original packaging.
Return procedure for BZT52H-C4V7-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZT52H-C4V7-QX Tags
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