It depends a bit on what you mean by “connecting wire” (jumper wire, USB cable, servo lead etc.), and what your requirements are (current, flexibility, connectors, insulation, etc.). Here are some good local / online options + what to look for — I can suggest products if you tell me the use case.
🔌 Product Overview
These 30cm connecting wires are designed for seamless connections between components on a breadboard, Arduino, Raspberry Pi, or other microcontroller boards. Whether you’re building a robotics system, prototyping a circuit, or just testing components, these pre-cut and stripped jumper wires save time and reduce clutter.
✅ What to Look for in a Good 30 cm Connecting Wire
| Feature | Why It Matters |
|---|---|
| Wire gauge (AWG) | Thicker wires (lower AWG number) carry more current, less voltage drop. For signals you can go thinner. |
| Stranded vs solid | Stranded is more flexible; solid is cheaper and less flexible. |
| Connector type | Do you need male‑male, female, specific plugs (USB, JST, Dupont, etc.)? |
| Insulation / Jacket | PVC, TPE, silicone, braided etc. Braided or silicone are more durable. |
| Shielding (if needed) | For data / high frequency / noisy environment, shielding helps. |
| Durability at ends | Strain relief, good solder or crimp joints, gold‐plated pins. |
Connecting Wire 11.91in（30cm）On Amazon
Here are several 30 cm wires you can buy locally or via Bangladeshi shops, depending on the type you need:
| Product | Type / Features | Approx Price / Notes |
|---|---|---|
| Remax RC‑120m 30 cm Short Micro USB Cable (3A) | Micro USB, good for charging + data, 3A fast charging. (BD Shop) | |
| Geeoo DC‑304 3‑in‑1 Cable 30 cm (5A) | Three kinds of connectors (Lightning / Type‑C / Micro), high current rating. | |
| 30 cm Servo Extension Lead (JR, 26 AWG) from RoboticsBD | Male + female, flat lead, good for RC/servo / robotics connections. | |
| Male to Male Jumper Wires 40‑Pin 30 cm (Dupont / breadboard style) | Good for prototyping, breadboards, Arduino etc. | |
| USB A‑to‑Mini‑B, A‑to‑B, A‑to‑C etc. 30 cm cables from Bigyan Project | For USB‑device connections, programming boards etc. |
🔧 Product Suggestions
If you tell me what kind of connecting wire you need (USB / power / signal / servo / jumper / etc.), I can recommend exact models. But here are a few good ones based on common uses:
- For high current short runs (power supply, fast charging): Geeoo DC‑304 3‑in‑1 5A 30 cm is a strong pick.
- For signal / data / prototyping: the 40‑pin 30 cm male‑male jumper wire set from amazon is inexpensive and flexible.
- For servo / robotics: the 30 cm servo extension lead (JR, 26 AWG) is good, since 26 AWG is reasonably thick for servo current, and the connectors are standard.
Connecting Wire 100PCS 11.91in（30cm）What to Check / Tips Before Buying
- Connector types (M‑M, M‑F, F‑F) — make sure it matches what you need. If you need both ends, mixed sets are useful.
- Wire thickness / gauge (AWG) — thinner wire is OK for signal, sensors; but for power or motors / high current you might want thicker. Many kits are 24‑AWG.
- Pin housing material and how well the connector fits / grips. Loose pins can be problematic.
- Insulation / jacket — some wires are more flexible, others stiffer. Flexible ones are nicer for tight routing.
- Quantity — you often get a full set of 40‑90 wires. Think whether you need such quantity or just a few.
- Length accuracy — many are “30 cm” but actual usable length may be a bit shorter once connectors are fitted