Electronic Components Spot Stock & BOM Matching — Diodes, Sensors, Crystal Oscillators, LED Chips, ICs | Speed Quote in 24H

Electronic Components Spot Stock & BOM Matching — 10 Years of Order Preparation Experience

When your production line is waiting and your BOM has 200 line items to fill, you need a supplier who can move fast. Keszoox has spent 10 years building one of the most comprehensive spot-stock inventories in the electronic components distribution industry — covering diodes, capacitors, resistors, IC chips, inductors, sensors, transistors, crystal oscillators, LED chips, connectors, and PCBA-ready component kits. Submit your BOM and receive a line-by-line speed quote within 24 hours, with most common parts available for same-day dispatch.

---

One-Stop BOM Matching — Eight Component Categories, All In Stock

Component Category	Key Types Stocked	Common Part Numbers	Availability
Diodes	Schottky, Zener, TVS, fast recovery, bridge rectifier, switching diode	1N4007, 1N5819, DB107, FR107, BZX55C, P6KE series	Spot stock
Capacitors	MLCC (C0G/X5R/X7R), aluminum electrolytic, tantalum, film, supercapacitor	100nF 0402, 10µF 0805, 1000µF 25V radial, 10µF tantalum	Spot stock
Resistors	Thick-film SMD, thin-film precision, wirewound, current sense, NTC thermistor	10kΩ 0402, 100Ω 0603, 1mΩ 2512, 10k NTC	Spot stock
IC Chips	MCU, timer IC, RTC, ADC, op-amp, logic, optocoupler, LED driver, audio IC	STM32F103CBT6, NE555, DS3231SN, HX711, PC817, LM3915N-1	Spot stock
Inductors	Shielded power inductor, ferrite bead, common-mode choke, toroidal	10µH 0805, 100µH 1210, 600Ω ferrite bead 0402	Spot stock
Sensors	Temperature, humidity, pressure, current, Hall effect, proximity, optical	DHT22, DS18B20, ACS712, LM35, BMP280, TCRT5000	Spot stock
Transistors	NPN/PNP BJT, MOSFET (N/P-channel), IGBT, Darlington, optocoupler transistor	2N2222, BC547, IRF540N, IRFZ44N, TIP120, MJE13003	Spot stock
Crystal Oscillators	SMD crystal, through-hole crystal, TCXO, VCXO, oscillator module	8MHz HC-49S, 16MHz SMD 3225, 32.768kHz, 12MHz 2-pin	Spot stock

---

Extended BOM Coverage — Beyond the Eight Core Categories

Additional Category	Key Types	Typical Applications
LED Chips & Modules	SMD LED (0402–5050), high-power LED, RGB LED, LED driver IC, COB module	Lighting, display backlighting, indicator, automotive lighting
Connectors	JST (SH/GH/ZH/PH/XH), Molex, DuPont, USB, FPC/FFC, IDC, terminal block	Wire-to-board, wire-to-wire, board-to-board, panel mount
PCBA Components	Full BOM kitting for PCB assembly; SMT and THT components	Prototype kits, NPI kits, production BOM fulfillment
Power Management	LDO regulators (LM317, LM7805), DC-DC converters, PMIC, gate drivers	Power supply design, battery management, motor control
Optocouplers	PC817, TLP521, 6N137, EL817; DIP-4 and SMD packages	Isolation, signal coupling, feedback in SMPS

---

Featured In-Stock Components — Ready for Immediate Dispatch

Discrete Semiconductors

Part Number	Type	Package	Key Specs	Application
DB107	Bridge rectifier	DIP-4	1A, 1000V; Vf = 1.1V	AC-DC power supply front-end
IRF540N / IRFZ44N	N-channel MOSFET	TO-220	100V / 55V; 33A / 49A; Rds(on) 44mΩ / 17.5mΩ	Motor drive, switching, synchronous rectification
D2PAK MOSFET	N-channel MOSFET	TO-263 (D2PAK)	High current; surface-mount power switching	Automotive, industrial power switching
MJE13003	NPN transistor	TO-220F	Vceo 400V; Ic 1.5A; switching transistor	SMPS, CFL ballast, flyback converter
1N4007 / FR107	Rectifier / fast recovery diode	DO-41	1A, 1000V / 1A, 1000V, Trr 500ns	General rectification / high-frequency rectification

IC Chips — Spot Stock Highlights

Part Number	Function	Package	Key Feature
STM32F103CBT6	32-bit ARM Cortex-M3 MCU	LQFP-48	72MHz; 128KB Flash; 20KB RAM; USB, CAN, SPI, I²C, UART
NE555 / LM555	Timer IC	SOP-8, DIP-8	Astable/monostable/bistable; 4.5V–16V; 200mA output
DS3231SN	Real-time clock (RTC)	SOIC-16	±2ppm accuracy; I²C; integrated TCXO; battery backup
HX711	24-bit ADC for load cells	SOP-16	24-bit resolution; 10Hz/80Hz output rate; for strain gauge / load cell
PC817 / EL817	Optocoupler	DIP-4	CTR 50–300%; Viso 5000V; general-purpose isolation
LM317	Adjustable LDO regulator	TO-220, TO-92, SOT-223	1.25V–37V output; 1.5A; classic adjustable regulator
LM3915N-1	LED bar graph driver	DIP-18	10-segment logarithmic display; dot or bar mode; 3V–25V
SOIC-24 wide-body IC	Logic / interface / memory	SOIC-24W (300mil)	24-pin wide SOIC; multiple function types stocked

---

Crystal Oscillators & Timing Devices — Full Frequency Range

Type	Frequency Range	Package	Stability	Application
HC-49S through-hole crystal	1MHz – 50MHz	HC-49S (through-hole)	±30 ppm	MCU clock, UART baud rate generation
SMD crystal 3225	8MHz, 12MHz, 16MHz, 24MHz	3.2×2.5mm SMD	±20 ppm	STM32, ESP32, Arduino, USB clock
SMD crystal 2016	16MHz – 48MHz	2.0×1.6mm SMD	±20 ppm	Compact MCU designs, wearables
32.768kHz watch crystal	32.768kHz	Through-hole, SMD	±20 ppm	RTC (DS3231, PCF8563), low-power timekeeping
TCXO module	10MHz – 40MHz	SMD 4-pad	±2.5 ppm (−40°C to +85°C)	GPS, cellular, precision timing
Oscillator module (CMOS)	1MHz – 100MHz	DIP-14, SMD 7050	±50 ppm	Clock generation, FPGA, DSP

---

Sensors — Temperature, Humidity, Pressure, Current & More

Sensor Type	Key Part Numbers	Interface	Range / Accuracy	Application
Temperature (digital)	DS18B20, DS3231 (integrated), LM75A	1-Wire, I²C	−55°C to +125°C; ±0.5°C	HVAC, industrial monitoring, IoT
Temperature + Humidity	DHT11, DHT22, SHT30, SHT31	Single-wire, I²C	0–100% RH; ±2% RH; ±0.3°C	Weather station, smart home, greenhouse
Pressure / Altitude	BMP280, BMP388, MS5611	I²C, SPI	300–1100 hPa; ±1 hPa	Drone altitude, weather monitoring, wearables
Current sensing	ACS712 (5A/20A/30A), INA219, INA226	Analog, I²C	0–30A; ±1.5% accuracy	Power monitoring, battery management, motor control
Optical / proximity	TCRT5000, GP2Y0A21, APDS-9960	Analog, I²C	2cm–80cm; gesture detection	Line following robot, proximity switch, gesture UI
Hall effect / magnetic	A3144, SS49E, DRV5023	Digital, analog	Omnipolar, unipolar; ±1mT	Motor position, speed sensing, door switch

---

LED Chips & Lighting Components

LED Type	Wavelength / Color	Package	Key Specs	Application
SMD LED 0402	Red, green, blue, white, yellow	0402	20mA; 2.0V–3.4V Vf	PCB indicator, backlight
SMD LED 0603 / 0805	Full color range + IR + UV	0603, 0805	20mA; wide viewing angle	Status indicator, display, sensor emitter
SMD LED 5050 RGB	RGB (WS2812B addressable)	5050	5V; addressable; 60mA full white	LED strip, decorative lighting, display matrix
High-power LED	White 6000K, warm white 3000K	Star PCB, COB	1W–10W; 80–120 lm/W	Flashlight, downlight, grow light
IR LED / photodiode	850nm, 940nm	3mm, 5mm, SMD	20mA–100mA; narrow beam	Remote control, proximity sensor, optical encoder

---

Speed Quote Service — How It Works

Keszoox was built around one core promise: save time and effort for every procurement engineer. Our speed quote workflow eliminates the back-and-forth that wastes days in traditional component sourcing.

1. Submit Your BOM — Upload your Excel or CSV BOM with part numbers, quantities, and any preferred brands or date code requirements
2. Automated BOM Matching — Our system cross-references your BOM against live inventory across all eight component categories simultaneously
3. Speed Quote Delivered — Line-by-line quote with availability, unit price, and lead time — within 24 hours for standard BOMs, same day for common parts
4. Alternative Suggestions Included — For any hard-to-find or over-priced line item, we proactively suggest qualified alternates with full datasheet comparison
5. One Order, One Shipment — Approve the quote; we pick, inspect, and consolidate your entire BOM into one package with a complete packing list and CoC

BOM Size	Line Items	Quote Turnaround	Dispatch Time
Small / Prototype	1–20 lines	Same day	1–2 days after approval
Medium / NPI	20–100 lines	Within 24 hours	2–5 days after approval
Large / Production	100–500 lines	24–48 hours	5–10 days after approval
Volume / Contract	500+ lines	By agreement	Dedicated sourcing team

---

10 Years of Order Preparation Experience

A decade in electronic component distribution teaches you things no catalog can capture. Keszoox has fulfilled BOM orders for engineers and procurement teams across consumer electronics, industrial automation, automotive, medical, and telecommunications — building deep expertise in:

• 🔍 Part number cross-referencing — Identifying functional equivalents across brands when your first-choice part is unavailable or over-priced
• 📅 Date code and lot traceability — Matching your date code requirements for production consistency and warranty compliance
• ⚠️ Counterfeit risk management — Knowing which part numbers carry the highest counterfeit risk and applying appropriate verification protocols
• 📦 Packaging compliance — Tape-and-reel, cut tape, tray, bulk — matched to your assembly line requirements
• 🌐 Global logistics — DHL, FedEx, UPS express; DDP available for most destinations; customs documentation prepared correctly the first time

---

Why Keszoox for Electronic Component Spot Stock?

#	Advantage	Detail
01	10 Years Experience	Decade of BOM fulfillment across all major component categories and industries
02	Speed Quote in 24H	Line-by-line quote with availability and pricing — same day for common parts
03	One-Stop BOM Matching	All 8 component categories matched from a single supplier — one PO, one shipment
04	Spot Stock Depth	Millions of line items in warehouse; no artificial lead times on common components
05	100% Original Parts	Authorized supply chain; multi-stage incoming QC; zero-tolerance counterfeit policy
06	Alternate Sourcing	Proactive alternate suggestions for hard-to-find, EOL, or allocated components
07	Global Shipping	DHL/FedEx/UPS express; DDP available; ships to 100+ countries
08	Save Time & Effort	One contact, one quote, one delivery — eliminate multi-vendor procurement overhead

---

Frequently Asked Questions

What component categories does your BOM matching service cover?

We cover all major electronic component categories: diodes, capacitors, resistors, IC chips, inductors, sensors, transistors, crystal oscillators, LED chips, connectors, optocouplers, and power management ICs. If a component is on your BOM, we can source it.

How fast can I get a quote for my BOM?

For BOMs up to 20 line items with common part numbers, we typically return a quote the same day. For larger BOMs (20–100 lines), quote turnaround is within 24 hours. Hard-to-find or specialty parts may require 24–72 hours for sourcing confirmation.

Can you supply crystal oscillators for specific MCU frequencies?

Yes. We stock crystals for all common MCU frequencies including 8MHz, 12MHz, 16MHz, 24MHz, 32MHz, and 48MHz in both through-hole (HC-49S) and SMD (3225, 2016) packages. 32.768kHz RTC crystals are also stocked. Custom frequencies available on request.

Do you stock sensors for IoT and embedded projects?

Yes. We stock DHT22, DS18B20, BMP280, ACS712, TCRT5000, and Hall effect sensors. Most are available for same-day dispatch.

What is the minimum order quantity?

MOQ is 1 piece for most components. Cut-tape minimum is typically 10 pieces for SMD passives. Full reel and tray orders available for production volumes. No artificial MOQ for prototype and R&D buyers.

Do you provide datasheets and certificates of conformance?

Yes. Full manufacturer datasheet is provided for every part number. A Certificate of Conformance (CoC) is included with every shipment. Lot traceability documentation available on request.

Enjoy free standard shipping on all orders over $199 USD. Orders are processed within 1–2 business days.

Not satisfied? Return any item within 90 days of purchase for a full refund or exchange. Items must be in original condition.

We are committed to quality, reliability, and customer satisfaction. Every product is carefully selected and tested to meet the highest standards.