Keszoox
Prototype-to-Production Electronic Components — Dev Boards, Passives, Crystals & Inductors | Single-Unit to Reel
Prototype-to-Production Electronic Components Dev Boards, Passives, Crystals & Inductors | Single-Unit to Reel
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From First Prototype to Full Production — Every Component, One Supplier
The journey from breadboard prototype to mass production PCB is full of component sourcing friction — minimum order quantities that don't fit prototype budgets, lead times that kill momentum, and suppliers who can't scale with you. Keszoox eliminates that friction.
We stock development boards, passive components, crystal oscillators, and power inductors in quantities from a single piece to full production reels — so the same supplier that ships your prototype parts today can fulfill your production BOM tomorrow.
Development Boards & Microcontroller Platforms
Every great product starts with a prototype. Our development board inventory covers the most popular platforms used by hardware engineers worldwide:
| Platform | Key Variants In Stock | Best For |
|---|---|---|
| Arduino | Nano, Uno R3, Mega 2560, Pro Mini, Leonardo | Rapid prototyping, maker projects, education |
| FPGA Boards | Xilinx Spartan-6, Artix-7, Kintex-7 eval boards | Digital logic, signal processing, custom hardware |
| NXP / ARM | LPC series, i.MX eval boards, FRDM kits | Industrial IoT, motor control, connectivity |
| Microchip PIC | PIC16F, PIC18F, PIC32 development kits | Embedded control, automotive, consumer |
| Relay & Interface Modules | 1/2/4/8-channel relay modules, optocoupler boards | GPIO expansion, load switching, automation |
| Display Modules | 7-segment (1/2/4-digit), OLED, LCD character displays | User interface, status indication, instrumentation |
Crystal Oscillators & Timing Components
Timing is everything in digital design. A wrong crystal frequency or poor oscillator stability can derail an entire project. Our timing component inventory covers every standard frequency and package used in modern electronics:
SMD Crystal Resonators
- 3225 (3.2×2.5mm) — Most common SMD crystal package; 8MHz, 12MHz, 16MHz, 20MHz, 25MHz, 32MHz
- 2016 (2.0×1.6mm) — Ultra-compact; ideal for space-constrained IoT and wearable designs
- 1612 (1.6×1.2mm) — Miniature; Bluetooth, WiFi module timing
- 32.768kHz SMD — RTC crystal; 3215, 2012 packages; ±20ppm standard
Through-Hole Crystal Resonators
- HC-49S (low profile) — Industry standard; 4MHz–40MHz; ±30ppm, ±20ppm, ±10ppm tolerance options
- HC-49U (full height) — Legacy designs and high-vibration environments
- Cylindrical (2×6mm) — 32.768kHz RTC; watch crystal form factor
Oscillator Modules (Active)
- TCXO — Temperature-compensated; ±2.5ppm over −40°C to +85°C; GPS, cellular, precision timing
- VCXO — Voltage-controlled; frequency synthesis, PLL applications
- Full-can oscillators — DIP-14, SMD 5×7mm; 1MHz–200MHz; CMOS/TTL output
Common Frequencies In Stock
1MHz, 2MHz, 4MHz, 6MHz, 8MHz, 10MHz, 12MHz, 16MHz, 20MHz, 24MHz, 25MHz, 27MHz, 32MHz, 40MHz, 48MHz, 50MHz, 100MHz, 125MHz — plus 32.768kHz for RTC applications.
SMD Power Inductors — Full Range
Power inductors are the unsung heroes of every switching power supply, DC-DC converter, and EMI filter. Our SMD inductor inventory covers the full range of values, current ratings, and package sizes demanded by modern power electronics design:
Shielded Power Inductors
- Package sizes: 2520, 3015, 4020, 4040, 5050, 6060, 7070, 8080
- Inductance values: 1µH, 2.2µH, 3.3µH, 4.7µH, 6.8µH, 10µH, 22µH, 33µH, 47µH, 68µH, 100µH, 150µH, 220µH, 330µH, 470µH
- Current ratings: 0.5A to 20A saturation current
- DCR: From 8mΩ (high-current) to 15Ω (high-inductance)
Coupled Inductors & Transformers
- Coiltronics CTX series — CTX280-4 and compatible; SEPIC, flyback, forward converter applications
- Common-mode chokes — SMD; 90Ω–900Ω @ 100MHz; USB, Ethernet, power line filtering
- Ferrite bead inductors — 0402, 0603, 0805; 25Ω–600Ω @ 100MHz; EMI suppression
Wirewound & Toroidal Inductors
- Toroidal power inductors for high-efficiency DC-DC converters
- Axial wirewound inductors for through-hole power supply designs
- RF inductors (0402, 0603) for impedance matching and filtering
Capacitors — Every Type, Every Value
Capacitors are the highest-volume passive component in any BOM. Our inventory covers all dielectric types, package sizes, and voltage ratings to support every stage of your design:
MLCC — Multilayer Ceramic Capacitors
- Package sizes: 0201, 0402, 0603, 0805, 1206, 1210, 1812, 2220
- Dielectric: C0G/NP0 (precision, stable), X5R, X7R (general purpose), Y5V (high capacitance)
- Values: 1pF to 100µF
- Voltage ratings: 6.3V, 10V, 16V, 25V, 50V, 100V, 250V, 500V, 1000V, 2000V
- High-voltage MLCC: 1kV–3kV for power electronics and snubber circuits
Aluminum Electrolytic Capacitors
- Radial THT: 5mm, 7.5mm, 10mm lead spacing; 6.3V–450V; 0.1µF–10,000µF; 85°C and 105°C
- SMD (V-chip): 4×5.4mm to 10×10.2mm; low-profile and standard height
- Snap-in: Large can; 35V–450V; 100µF–100,000µF; power supply bulk storage
Tantalum Capacitors
- SMD tantalum: Case A (3216), B (3528), C (6032), D (7343); 2.5V–35V; 0.1µF–330µF
- Polymer tantalum: Ultra-low ESR; ideal for CPU/FPGA decoupling and high-frequency filtering
Film Capacitors
- CBB (Polypropylene): 63V–1000V; 1nF–10µF; low loss, high stability; audio and power applications
- PET (Polyester): 63V–630V; general purpose bypass and coupling
- X2 / Y2 Safety Capacitors: AC line filtering; UL/VDE/CQC certified; 275VAC X2, 250VAC Y2
Ceramic Disc Capacitors
- 50V–3000V; 1pF–100nF; high-voltage bypass and coupling
Passive Components — Resistors & More
Resistors
- SMD Chip Resistors: 0201, 0402, 0603, 0805, 1206, 2512; ±1% standard, ±0.1% precision; 1Ω–10MΩ; 1/20W–2W
- Carbon Film THT: 1/4W, 1/2W, 1W; ±5%; color-coded; bulk pack available
- Metal Film THT: 1/4W, 1/2W; ±1%, ±0.5%; low noise; precision applications
- Wirewound Power: 2W–25W; cement and aluminum-housed; high-current sensing and braking
- Current Sense Resistors: 0.001Ω–0.1Ω; ±1%; 2512, 4527 packages; motor control and power monitoring
LEDs
- THT LEDs: 3mm, 5mm, 10mm; red, green, blue, yellow, white, orange, UV, IR; 20mA standard
- SMD LEDs: 0402, 0603, 0805, 1206; single color and RGB; high-brightness options
Pin Headers & Connectors
- 2.54mm single/double row male/female headers; breakaway strips; right-angle and vertical
- 2.0mm and 1.27mm pitch headers for compact PCB designs
Ordering Flexibility — Prototype Quantities to Production Reels
| Stage | Quantity | Packaging | Keszoox Solution |
|---|---|---|---|
| Proof of Concept | 1–10 pcs | Cut tape / loose | Single-unit orders accepted, no MOQ |
| Engineering Sample | 10–100 pcs | Cut tape / tray | Standard pricing, fast dispatch |
| Pilot Production | 100–1,000 pcs | Cut tape / partial reel | Volume pricing available |
| Mass Production | 1,000+ pcs | Full reel (T&R) / tray | Competitive bulk pricing, CoC included |
Frequently Asked Questions
Can I mix different components in one order?
Yes. You can order multiple component types — dev boards, capacitors, inductors, crystals — in a single order. All items ship together in one consolidated package, saving on shipping costs.
Do you stock crystals for specific microcontroller requirements?
Yes. We stock crystals optimized for common MCU clock requirements including 8MHz (Arduino Uno), 16MHz (Arduino Nano/Mega), 12MHz (USB full-speed), 25MHz (Ethernet PHY), and 32.768kHz (RTC). Contact us if you need a specific frequency not listed.
What inductor specifications should I check before ordering?
Key parameters to verify: inductance value (L in µH), saturation current (Isat), RMS current (Irms), DC resistance (DCR), and self-resonant frequency (SRF). Our team can help cross-reference inductors if you provide your switching frequency and current requirements.
Are your MLCC capacitors AEC-Q200 qualified for automotive use?
We stock both standard-grade and AEC-Q200 automotive-grade MLCCs. Specify automotive grade when ordering and we will confirm availability of the appropriate qualification level.
Can I get a sample kit of passive components for evaluation?
Yes. We can assemble custom sample kits of resistors, capacitors, inductors, or crystals based on your value range requirements. Contact our team with your specifications for a custom kit quote.
