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NXP Semiconductors BZX84-C3V3/LF1R
- Part No.:
- BZX84-C3V3/LF1R
- Manufacturer:
- NXP Semiconductors
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84-C3V3/LF1R.pdf
- Description:
- DIODE ZENER 3.3V 250MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:5,544
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Product details
Overview
BZX84-C3V3/LF1R from NXP Semiconductors is a ±5 % tolerance Zener voltage regulator diode in SOT23 (TO-236AB) package, rated for 3.3 V nominal breakdown voltage at 5 mA, 250 mW total power dissipation, and AEC-Q101 qualified for automotive use. It provides stable reference voltage in low-power supply regulation and overvoltage protection circuits.
For engineers reviewing the BZX84-C3V3/LF1R datasheet, BZX84-C3V3/LF1R pinout, BZX84-C3V3/LF1R application, or BZX84-C3V3/LF1R equivalent, key selection considerations include its 3.1 V to 3.5 V Zener voltage range, 85 Ω typical differential resistance at 5 mA, 5 µA maximum reverse current at 1 V, −2.4 mV/K temperature coefficient, and suitability for space-constrained PCB designs requiring automotive-grade reliability.
Technical Context
The BZX84-C3V3/LF1R operates as a two-terminal shunt voltage regulator, maintaining a stable reverse-biased breakdown voltage across its anode–cathode terminals under controlled current conditions. Its design supports operation from −65 °C to +150 °C junction temperature with thermal resistance of 500 K/W (junction-to-ambient) on FR4 PCB.
It exhibits a negative temperature coefficient of −2.4 mV/K at 5 mA, indicating decreasing Zener voltage with rising temperature - a critical factor in precision biasing and temperature-compensated reference circuits. The device is characterized with non-repetitive peak reverse power dissipation up to 40 W for ≤100 µs pulses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.1 V to 3.5 V at IZ = 5 mA - defines usable regulation window under standard test condition |
| Differential Resistance (rdiff) | 85 Ω typical at IZ = 5 mA - determines output impedance and load regulation sensitivity |
| Reverse Current (IR) | ≤5 µA at VR = 1 V - ensures low leakage in standby or high-impedance sensing nodes |
| Temperature Coefficient (SZ) | −2.4 mV/K at IZ = 5 mA - quantifies voltage drift per degree Celsius for thermal stability analysis |
| Total Power Dissipation (Ptot) | 250 mW at Tamb ≤25 °C - sets maximum continuous DC power handling on standard FR4 PCB |
| Non-repetitive Peak Power (PZSM) | 40 W for tp ≤100 µs - enables transient overvoltage clamping without failure |
| Forward Voltage (VF) | ≤0.9 V at IF = 10 mA - confirms low conduction loss when used in forward-biased protection paths |
Pinout & Package
SOT23 (TO-236AB) plastic surface-mounted package with 3 leads; 2.8 mm × 1.4 mm footprint, 1.1 mm height, and gull-wing lead configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Anode) | Anode terminal | Connected to lower-potential node in shunt regulation; reverse-biased during Zener operation |
| 2 (n.c.) | Not connected | Internally unconnected; no electrical function - must remain floating on PCB layout |
| 3 (Cathode) | Cathode terminal | Connected to higher-potential node; carries regulated current during breakdown conduction |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control, body electronics, and infotainment systems |
| ±5 % Zener voltage tolerance | Cost-optimized regulation accuracy suitable for non-critical biasing and protection functions |
| Low-profile SOT23 package | Enables high-density placement on compact PCBs with standard reflow soldering compatibility |
| Non-repetitive 40 W surge rating | Provides robust ESD and transient immunity without external TVS supplementation |
| −2.4 mV/K tempco at 5 mA | Enables predictable thermal drift modeling in reference circuits operating across industrial temperature range |
Applications
| Automotive Sensor Biasing | Industrial Power Supply Monitoring |
|---|---|
Use Scenario: Providing stable 3.3 V reference for analog sensor signal conditioning in engine coolant temperature modules. IC Role / Device Role / Timing Role: Shunt voltage reference regulating bias current for thermistor interface circuitry. Use Value: Maintains <±2 % reference accuracy over −40 °C to +125 °C ambient, meeting AEC-Q100 Grade 2 requirements. |
Use Scenario: Detecting undervoltage conditions in 5 V rail of programmable logic controller (PLC) I/O modules. IC Role / Device Role / Timing Role: Zener-clamped comparator input establishing precise 3.3 V trip threshold. Use Value: Delivers 5 µA max leakage at 1 V reverse bias, minimizing false triggers in high-impedance monitoring paths. |
| Consumer USB Port Protection | Medical Diagnostic Equipment Reference |
Use Scenario: Clamping induced transients on USB VBUS line during hot-plug events in portable medical monitors. IC Role / Device Role / Timing Role: Low-energy shunt protector absorbing ≤100 µs surges up to 40 W peak power. Use Value: Withstands 40 W non-repetitive pulses without degradation, eliminating need for larger TVS diodes. |
Use Scenario: Generating stable 3.3 V reference for ADC front-end in portable ultrasound probe signal chain. IC Role / Device Role / Timing Role: Precision voltage reference source with known temperature coefficient for calibration compensation. Use Value: −2.4 mV/K tempco allows software-based drift correction using onboard temperature sensor readings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5226BS-7-F (Diodes Inc.) | 3.3 V nominal, ±5 %, 200 mW Ptot, SOT23, 100 Ω rdiff at 20 mA | Higher differential resistance and lower power rating reduce regulation precision under load variation | Select when legacy Diodes Inc. BOM alignment is required; verify thermal margin at full 250 mW target |
| 1SMA4728A (ON Semiconductor) | 3.3 V nominal, ±5 %, 1 W Ptot, DO-214AC (SMA), 10 Ω rdiff at 76 mA | Larger SMA package increases board area; higher power rating suits higher-current regulation | Choose for higher-power applications where SOT23 thermal limits are exceeded; not drop-in compatible |
Compared with MMBZ5226BS-7-F, BZX84-C3V3/LF1R offers lower rdiff and higher Ptot in identical SOT23 footprint; versus 1SMA4728A, it trades power capacity and thermal robustness for miniaturization and AEC-Q101 compliance - making it optimal for automotive and space-constrained industrial designs.
Availability
BZX84-C3V3/LF1R is available at Aetrix Electronics and suitable for automotive sensor biasing, industrial power monitoring, USB port protection, and medical reference applications requiring stable component supply with AEC-Q101 assurance.
Supply support for BZX84-C3V3/LF1R 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
NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT markets.
The BZX84 series was designed as a cost-effective, AEC-Q101 qualified family of low-power Zener diodes targeting automotive body electronics, sensor interfaces, and industrial control systems requiring reliable voltage regulation in miniature SMT packages.
FAQ
What is the Zener voltage tolerance of BZX84-C3V3/LF1R?
The BZX84-C3V3/LF1R has a nominal Zener voltage of 3.3 V with a tolerance of approximately ±5 %, meaning its actual breakdown voltage falls between 3.1 V and 3.5 V when tested at 5 mA. This tolerance is defined per the BZX84-C series specification and confirmed in Table 8 of the NXP datasheet Rev. 6.
Is BZX84-C3V3/LF1R suitable for automotive applications?
Yes, BZX84-C3V3/LF1R is AEC-Q101 qualified per Section 8.1 of the NXP datasheet, confirming its reliability for automotive use including engine control units, body control modules, and ADAS sensor interfaces. It operates across −65 °C to +150 °C junction temperature and meets stress-test requirements for discrete semiconductors.
What is the maximum forward current rating for BZX84-C3V3/LF1R?
The absolute maximum forward current for BZX84-C3V3/LF1R is 200 mA, as specified in Table 5 (Limiting Values) of the NXP datasheet. At 10 mA forward current, the typical forward voltage is ≤0.9 V, ensuring low conduction loss in protection or polarity-sensing configurations.
How does the temperature coefficient affect BZX84-C3V3/LF1R performance?
The BZX84-C3V3/LF1R has a temperature coefficient of −2.4 mV/K at 5 mA, meaning its Zener voltage decreases by 2.4 mV per Kelvin rise in junction temperature. This characteristic is critical for applications requiring thermal drift compensation, such as precision reference generation in medical or industrial instrumentation.
What is the thermal resistance of BZX84-C3V3/LF1R on a standard PCB?
When mounted on a FR4 PCB with single-sided copper, tin-plated and standard footprint, BZX84-C3V3/LF1R has a thermal resistance from junction to ambient (Rth(j-a)) of up to 500 K/W, as stated in Table 6. This value governs steady-state temperature rise under continuous power dissipation and informs derating requirements above 25 °C ambient.
BZX84-C3V3/LF1R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 3.3 V
- Tolerance:
- ±5%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 95 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23 (TO-236AB)
BZX84-C3V3/LF1R FAQ
1.How can I place an order for BZX84-C3V3/LF1R through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84-C3V3/LF1R 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 BZX84-C3V3/LF1R reliable?
The price and inventory of BZX84-C3V3/LF1R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84-C3V3/LF1R is usually 5 days.
3.What payment methods are accepted for BZX84-C3V3/LF1R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84-C3V3/LF1R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84-C3V3/LF1R?
BZX84-C3V3/LF1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84-C3V3/LF1R 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 BZX84-C3V3/LF1R?
For technical support, including BZX84-C3V3/LF1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84-C3V3/LF1R requirements.
6.How does Aetrix verify that BZX84-C3V3/LF1R is sourced from the original manufacturer or authorized distributors?
All BZX84-C3V3/LF1R 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 BZX84-C3V3/LF1R meets industry standards.
7.What is the process for return or replacement of BZX84-C3V3/LF1R?
All BZX84-C3V3/LF1R units undergo pre-shipment inspection (PSI). If there is an issue with BZX84-C3V3/LF1R, 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 BZX84-C3V3/LF1R part is unused and in its original packaging.
Return procedure for BZX84-C3V3/LF1R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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