The FTR-B3 Series Miniature Relays are a type of ultra-miniature relays produced by Fujitsu. They have high insulation design, ultra-thin and lightweight, excellent high frequency characteristics, and low power consumption.
The FTR‑B3 series are ultra‑miniature (SMT) 2‑contact relays designed for telecommunications and data‑networking equipment. They feature a low profile (5.2+0.2 mm height), lightweight construction (≈0.8 g), gold‑plated silver alloy contacts and high insulation ratings meeting UL, CSA and IEC standards.
The document lists detailed electrical specifications, mechanical dimensions, ordering codes, packaging details and recommended soldering temperature profiles for both infrared reflow and vapor‑phase processes.
| Height | 5.2+0.2 mm |
|---|---|
| Weight | ≈0.8 g |
| Contact rating | 30 VDC 1 A, 125 VAC 0.3 A (resistive) |
| Contact resistance (initial) | 75 mΩ |
| Coil power (standard type) | 140 mW |
| Maximum switching power | 62.5 VA / 30 W |
| Operating temperature range | -40 °C to +85 °C |
| Packaging quantity per reel | 1000 pieces |
The standard type relay consumes 140 mW of coil power at 20 °C.
The contacts are rated for 30 VDC at 1 A and 125 VAC at 0.3 A (resistive load).
The recommended maximum temperatures are T3 = 245 °C, T2 = 200 °C and T1 = 165 °C.
A standard reel contains 1,000 relays.