My Inquiry
My Account
NXP Semiconductors BZX84-C18/LF1VL
- Part No.:
- BZX84-C18/LF1VL
- Manufacturer:
- NXP Semiconductors
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84-C18/LF1VL.pdf
- Description:
- DIODE ZENER 18V 250MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,627
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZX84-C18/LF1VL from NXP Semiconductors is a ±5 % tolerance Zener voltage regulator diode in SOT23 (TO-236AB) package, rated for 18 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-C18/LF1VL datasheet, BZX84-C18/LF1VL pinout, BZX84-C18/LF1VL application, or BZX84-C18/LF1VL equivalent, this page delivers verified electrical parameters, thermal limits, SOT23 terminal mapping, automotive qualification status, and direct alternative part comparisons - all confirmed against NXP's Rev. 6 (2014) product data sheet.
Technical Context
This discrete Zener diode operates in reverse-biased breakdown mode to maintain a stable 18 V reference across load variations. Its differential resistance is 50 Ω (typ) at IZ = 5 mA, with reverse current ≤0.05 μA at VR = 14.4 V and temperature coefficient of +12.4 mV/K (typ) at IZ = 5 mA.
Designed for surface-mount operation on FR4 PCBs with single-sided copper, it supports non-repetitive peak reverse power dissipation up to 40 W (tp ≤100 μs) and junction temperatures from −65 °C to +150 °C. The device meets AEC-Q101 stress test requirements for automotive discrete semiconductors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage (VZ) | 18 V at IZ = 5 mA - defines regulated output voltage under standard test condition |
| Tolerance | ±5 % - specifies allowable deviation (17.1 V to 19.1 V) in production units |
| Total Power Dissipation (Ptot) | 250 mW at Tamb ≤25 °C - maximum continuous DC power before thermal derating |
| Differential Resistance (rdif) | 50 Ω (typ) at IZ = 5 mA - indicates regulation stiffness; lower value improves voltage stability vs. current change |
| Reverse Current (IR) | ≤0.05 μA at VR = 14.4 V - leakage level below knee voltage; critical for low-power standby circuits |
| Temperature Coefficient (SZ) | +12.4 mV/K (typ) at IZ = 5 mA - quantifies VZ drift per degree Celsius; positive sign indicates rising VZ with temperature |
| Non-repetitive Peak Reverse Power | 40 W (tp ≤100 μs) - surge capability for transient suppression without failure |
Pinout & Package
SOT23 (TO-236AB) plastic surface-mounted package with 3 leads; dimensions: 2.9 mm × 1.3 mm × 1.0 mm (L × W × H), 0.95 mm lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Anode) | Anode connection | Connected to lower-potential side in reverse-bias configuration; forward voltage drop ≤0.9 V at 10 mA |
| 2 (n.c.) | Not connected | Internal die bond wire stub; electrically isolated - must not be soldered or biased |
| 3 (Cathode) | Cathode connection | Connected to higher-potential side in reverse-biased regulation; marked with cathode band on package |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control, body electronics, and infotainment systems |
| ±5 % voltage tolerance | Cost-optimized precision for non-critical regulation where tight tolerances are unnecessary |
| 250 mW power rating | Enables compact PCB layout in space-constrained consumer and industrial modules |
| Low leakage (≤0.05 μA) | Minimizes quiescent current draw in battery-powered or always-on monitoring circuits |
| SOT23 footprint compatibility | Supports automated pick-and-place assembly and reflow/wave soldering per NXP-recommended land patterns |
Applications
| Automotive Body Control Module (BCM) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Voltage reference for microcontroller ADC inputs monitoring door lock actuator current. IC Role / Device Role / Timing Role: Zener diode providing stable 18 V reference to bias op-amp input stage. Use Value: Maintains measurement accuracy across −40 °C to +125 °C ambient range with <±1.5 % total drift, enabled by AEC-Q101 qualification and +12.4 mV/K tempco. |
Use Scenario: Overvoltage clamp protecting 16-bit DAC output from ESD-induced transients. IC Role / Device Role / Timing Role: Shunt regulator clamping DAC output to 18 V during fault conditions. Use Value: Absorbs 40 W non-repetitive surges (tp ≤100 μs) without degradation, preserving signal integrity in factory automation I/O modules. |
| Consumer Power Adapter Feedback | Medical Portable Device Power Supervision |
Use Scenario: Secondary-side voltage reference in flyback converter feedback loop. IC Role / Device Role / Timing Role: Zener diode setting TL431 reference threshold via resistive divider. Use Value: Delivers 18 V ±5 % stability across line/load variations, enabling ±3 % output regulation in cost-sensitive AC/DC adapters. |
Use Scenario: Undervoltage lockout (UVLO) threshold generator for lithium-ion battery management IC. IC Role / Device Role / Timing Role: Zener diode establishing 18 V trip point for system reset circuitry. Use Value: Ensures reliable shutdown at VIN < 17.1 V while drawing only 0.05 μA leakage, extending battery runtime in handheld diagnostics tools. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STMicroelectronics BZT52-C18 | Same 18 V ±5 %, 250 mW rating; differential resistance 60 Ω (max) vs. 50 Ω (typ) for BZX84-C18/LF1VL | Qualified to AEC-Q101 but lacks explicit automotive grade marking in ordering code | Select when sourcing flexibility across multiple franchises is prioritized over NXP-specific automotive traceability |
| Vishay BZX84-C18-TP | Identical 18 V ±5 %, 250 mW, SOT23 package; reverse current 0.1 μA (max) at 14.4 V vs. 0.05 μA (max) for BZX84-C18/LF1VL | RoHS-compliant and halogen-free; no AEC-Q101 documentation publicly available | Prefer for commercial/industrial designs requiring lowest-cost procurement without automotive validation overhead |
Compared with BZX84-C18/LF1VL, BZT52-C18 offers broader distributor availability but slightly higher dynamic impedance, while BZX84-C18-TP trades tighter leakage control and automotive qualification for simplified environmental compliance - making BZX84-C18/LF1VL optimal where AEC-Q101 traceability and low leakage are mandatory.
Availability
BZX84-C18/LF1VL is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, consumer power adapter feedback loops, and medical portable device power supervision requiring stable component supply and long-term lifecycle support.
Supply support for BZX84-C18/LF1VL 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 belongs to NXP's discrete voltage regulator portfolio, engineered for cost-effective, high-reliability Zener regulation in space-constrained SMT applications - particularly targeting automotive subsystems needing AEC-Q101 validation.
FAQ
What is the exact Zener voltage tolerance for BZX84-C18/LF1VL?
The BZX84-C18/LF1VL has a nominal Zener voltage of 18 V with a tolerance of approximately ±5 %, meaning its actual breakdown voltage falls between 17.1 V and 19.1 V when tested at IZ = 5 mA and Tj = 25 °C. This tolerance band is defined in Table 8 of the NXP BZX84_SER Rev. 6 datasheet and applies specifically to the "C" variant of the BZX84 series.
Is BZX84-C18/LF1VL suitable for automotive applications?
Yes, BZX84-C18/LF1VL is AEC-Q101 qualified per Section 8.1 of the NXP datasheet, confirming it has passed stress tests for automotive discrete semiconductors. This makes BZX84-C18/LF1VL appropriate for under-hood and cabin applications such as body control modules, lighting drivers, and sensor interfaces where reliability across extended temperature ranges is required.
What is the maximum non-repetitive peak reverse power dissipation for BZX84-C18/LF1VL?
The BZX84-C18/LF1VL supports a non-repetitive peak reverse power dissipation of 40 W under pulse conditions of tp ≤100 μs and duty cycle δ ≤ 0.02, as specified in Table 5 (Limiting Values) of the NXP datasheet. This rating enables transient voltage suppression in surge-prone environments without permanent device damage.
How does the temperature coefficient affect BZX84-C18/LF1VL performance?
The BZX84-C18/LF1VL exhibits a typical temperature coefficient of +12.4 mV/K at IZ = 5 mA, meaning its Zener voltage increases by ~12.4 mV per degree Celsius rise in junction temperature. This positive coefficient must be factored into precision reference designs operating across wide ambient ranges, especially above 85 °C where cumulative drift becomes significant.
What are the thermal resistance values for BZX84-C18/LF1VL?
Per Table 6 of the NXP datasheet, BZX84-C18/LF1VL has a thermal resistance from junction to ambient (Rth(j-a)) of 500 K/W in free air, and from junction to solder point (Rth(j-sp)) of 330 K/W when mounted on a FR4 PCB with single-sided copper and standard footprint. These values guide heatsinking decisions and power derating calculations.
BZX84-C18/LF1VL 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):
- 18 V
- Tolerance:
- ±5%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 45 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 12.6 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-C18/LF1VL FAQ
1.How can I place an order for BZX84-C18/LF1VL through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84-C18/LF1VL 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-C18/LF1VL reliable?
The price and inventory of BZX84-C18/LF1VL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84-C18/LF1VL is usually 5 days.
3.What payment methods are accepted for BZX84-C18/LF1VL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84-C18/LF1VL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84-C18/LF1VL?
BZX84-C18/LF1VL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84-C18/LF1VL 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-C18/LF1VL?
For technical support, including BZX84-C18/LF1VL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84-C18/LF1VL requirements.
6.How does Aetrix verify that BZX84-C18/LF1VL is sourced from the original manufacturer or authorized distributors?
All BZX84-C18/LF1VL 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-C18/LF1VL meets industry standards.
7.What is the process for return or replacement of BZX84-C18/LF1VL?
All BZX84-C18/LF1VL units undergo pre-shipment inspection (PSI). If there is an issue with BZX84-C18/LF1VL, 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-C18/LF1VL part is unused and in its original packaging.
Return procedure for BZX84-C18/LF1VL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84-C18/LF1VL Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
