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NXP Semiconductors BZX84-C4V7/LF1R
- Part No.:
- BZX84-C4V7/LF1R
- Manufacturer:
- NXP Semiconductors
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84-C4V7/LF1R.pdf
- Description:
- DIODE ZENER 4.7V 250MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:4,588
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Product details
Overview
BZX84-C4V7/LF1R from NXP Semiconductors is a ±5 % tolerance Zener diode in SOT23 (TO-236AB) package, rated for 4.7 V nominal breakdown voltage at 5 mA, 250 mW total power dissipation, and 0.9 V forward voltage at 10 mA. It serves as a low-power voltage reference or regulation element in power supply feedback paths, overvoltage protection circuits, and signal-level clamping applications.
For engineers reviewing the BZX84-C4V7/LF1R datasheet, BZX84-C4V7/LF1R pinout, BZX84-C4V7/LF1R application, or BZX84-C4V7/LF1R equivalent, key selection criteria include its ±5 % Zener voltage tolerance, 40 W non-repetitive peak reverse power capability, AEC-Q101 qualification for automotive use, thermal resistance of 500 K/W (junction-to-ambient), and differential resistance of 425 Ω at 5 mA.
Technical Context
This device operates as a silicon planar Zener diode with controlled reverse-breakdown characteristics. Its 4.7 V nominal Zener voltage is specified at IZ = 5 mA, with a typical temperature coefficient of −1.4 mV/K and differential resistance of 425 Ω under that condition.
It is designed for surface-mount operation on FR4 PCBs with single-sided copper, tin-plated finish, and standard SOT23 footprint. The device supports pulse operation up to 40 W (tp ≤ 100 μs, δ ≤ 0.02) and maintains stable regulation across ambient temperatures from −55 °C to +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.4 V to 5.0 V at IZ = 5 mA - defines regulation window for precision biasing or clamping |
| Tolerance | ±5 % - enables cost-effective voltage reference where tight regulation is not critical |
| Total Power Dissipation (Ptot) | 250 mW at Tamb ≤ 25 °C - sets maximum continuous DC power handling in standard PCB layout |
| Differential Resistance (rdif) | 425 Ω typical at IZ = 5 mA - determines output impedance and load regulation sensitivity |
| Forward Voltage (VF) | 0.9 V max at IF = 10 mA - defines conduction loss when used in forward-biased protection paths |
| Non-repetitive Peak Reverse Power (PZSM) | 40 W - supports transient surge suppression without failure under short-duration pulses |
| Reverse Current (IR) | 3 μA max at VR = 3.0 V - ensures low leakage in high-impedance reference nodes |
Pinout & Package
Package: SOT23 (TO-236AB), plastic surface-mounted package with 3 leads; dimensions 2.9 mm × 1.3 mm × 1.0 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Anode) | Anode connection | Forward current entry point; connected to lower-potential node in Zener regulation configuration |
| 2 (n.c.) | Not connected | No internal bond wire; must remain unconnected on PCB to avoid parasitic coupling or mechanical stress |
| 3 (Cathode) | Cathode connection | Reverse-bias terminal; tied to higher-potential node for Zener operation; primary thermal path to PCB |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity, and mechanical shock testing |
| ±5 % Zener voltage tolerance | Cost-optimized alternative to tighter-tolerance variants while maintaining functional stability in non-critical regulation |
| Low thermal resistance (Rth(j-sp) = 330 K/W) | Enables efficient heat transfer from junction to solder point, supporting sustained operation near Ptot limit |
| Standard SOT23 footprint | Ensures compatibility with automated pick-and-place equipment and reflow/wave soldering processes |
| Non-repetitive peak reverse current (IZSM) | 6.0 A at tp = 100 μs - provides robust transient immunity in ESD and surge-prone interfaces |
Applications
| Power Supply Feedback Clamping | Automotive Sensor Biasing |
|---|---|
Use Scenario: Used in the feedback divider of a DC-DC converter to clamp reference voltage and prevent overregulation during load transients. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to fix upper voltage threshold at error amplifier input. Use Value: Limits output voltage excursion to within ±5 % of 4.7 V, preventing downstream IC damage during 100 μs surges up to 40 W. | Use Scenario: Provides stable 4.7 V bias to analog sensor front-end circuitry in engine control modules. IC Role / Device Role / Timing Role: Precision voltage reference source for op-amp biasing and ADC reference scaling. Use Value: Maintains sensor signal integrity across −40 °C to +125 °C ambient with <3 μA leakage at 3.0 V reverse bias. |
| ESD Protection Clamp | Microcontroller I/O Level Shifting |
Use Scenario: Placed between MCU GPIO and external connector to shunt ESD events before they reach sensitive inputs. IC Role / Device Role / Timing Role: Transient voltage suppressor operating in avalanche mode during fast-rising ESD pulses. Use Value: Clamps 8 kV contact discharge to <12 V peak with 6.0 A non-repetitive peak current capability and <100 ns response. | Use Scenario: Interfaces 5 V logic signals to 3.3 V microcontroller I/O pins by clamping high-side voltage to 4.7 V. IC Role / Device Role / Timing Role: Passive level translator using forward conduction (anode grounded) and reverse breakdown (cathode at 4.7 V). Use Value: Enables safe bidirectional signal translation with 0.9 V forward drop and no active components or timing delay. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5225BS-7-F | 4.7 V nominal, ±5 %, 225 mW Ptot, SOT23 package, 500 Ω rdif at 20 mA | Lower power rating and higher differential resistance reduce regulation accuracy under load | Select when lower cost and legacy design compatibility outweigh need for 250 mW headroom |
| BZX84-C4V7-7-F | Identical electrical specs and SOT23 package; differs only in tape/reel packaging (3000 vs. 10000 pcs per reel) | No functional difference; identical performance and PCB layout | Choose based on volume procurement requirements and logistics preference |
Compared with MMBZ5225BS-7-F, BZX84-C4V7/LF1R delivers 11 % higher power margin and 15 % lower dynamic impedance, improving regulation stability in higher-current bias networks; versus BZX84-C4V7-7-F, it offers identical electrical behavior with alternate packaging format for specific assembly line requirements.
Availability
BZX84-C4V7/LF1R is available at Aetrix Electronics and suitable for automotive sensor modules, industrial power supply feedback loops, and consumer electronics ESD protection circuits requiring stable component supply and AEC-Q101 compliance.
Supply support for BZX84-C4V7/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 applications.
The BZX84 series is part of NXP's discrete voltage regulator portfolio, engineered for reliable low-power voltage reference and clamping in space-constrained, thermally demanding environments such as engine control units and portable medical devices.
FAQ
What is the Zener voltage tolerance of BZX84-C4V7/LF1R?
The BZX84-C4V7/LF1R has a nominal Zener voltage of 4.7 V with a tolerance of approximately ±5 %, meaning its actual breakdown voltage falls between 4.4 V and 5.0 V when measured at 5 mA test current. This tolerance aligns with the "C" grade of the BZX84 series and is confirmed in Table 8 of the NXP datasheet Rev. 6.
Is BZX84-C4V7/LF1R qualified for automotive use?
Yes, BZX84-C4V7/LF1R is AEC-Q101 qualified, as explicitly stated in Section 8.1 of the NXP product data sheet. This qualification covers stress tests including temperature cycling, high-temperature reverse bias, and mechanical shock, making BZX84-C4V7/LF1R suitable for under-hood and cabin automotive applications.
What is the maximum forward current rating for BZX84-C4V7/LF1R?
The absolute maximum forward current for BZX84-C4V7/LF1R is 200 mA, as specified in Table 5 (Limiting Values) of the NXP datasheet. However, typical forward operation occurs at ≤10 mA (VF = 0.9 V max), and sustained forward conduction above 50 mA requires thermal derating due to its 250 mW total power limit.
Can BZX84-C4V7/LF1R be used in place of BZX84-C4V7-7-F?
Yes, BZX84-C4V7/LF1R and BZX84-C4V7-7-F are electrically and mechanically identical - same Zener voltage, tolerance, power rating, package, and pinout. The suffix difference reflects only packaging format (tape-and-reel quantity and carrier specifications), so BZX84-C4V7/LF1R can directly replace BZX84-C4V7-7-F in PCB assembly without layout or schematic changes.
What is the thermal resistance from junction to ambient for BZX84-C4V7/LF1R?
The thermal resistance from junction to ambient (Rth(j-a)) for BZX84-C4V7/LF1R is 500 K/W under free-air conditions, as listed in Table 6 of the NXP datasheet. This value assumes mounting on a FR4 PCB with single-sided copper, tin-plated finish, and standard SOT23 footprint - critical for calculating junction temperature rise under continuous power dissipation.
BZX84-C4V7/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):
- 4.7 V
- Tolerance:
- ±5%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 2 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-C4V7/LF1R FAQ
1.How can I place an order for BZX84-C4V7/LF1R through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84-C4V7/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-C4V7/LF1R reliable?
The price and inventory of BZX84-C4V7/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-C4V7/LF1R is usually 5 days.
3.What payment methods are accepted for BZX84-C4V7/LF1R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84-C4V7/LF1R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84-C4V7/LF1R?
BZX84-C4V7/LF1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84-C4V7/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-C4V7/LF1R?
For technical support, including BZX84-C4V7/LF1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84-C4V7/LF1R requirements.
6.How does Aetrix verify that BZX84-C4V7/LF1R is sourced from the original manufacturer or authorized distributors?
All BZX84-C4V7/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-C4V7/LF1R meets industry standards.
7.What is the process for return or replacement of BZX84-C4V7/LF1R?
All BZX84-C4V7/LF1R units undergo pre-shipment inspection (PSI). If there is an issue with BZX84-C4V7/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-C4V7/LF1R part is unused and in its original packaging.
Return procedure for BZX84-C4V7/LF1R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84-C4V7/LF1R Tags
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MMSZ5231B-7-F
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