Product Overview
Archer 275-243 5VDC Subminiature 1 Form C PC Board Relay
Condition
New old stock vintage part in unopened package. Card and sealed blister show light cosmetic shelf aging from long-term storage. Relay is factory-sealed inside original packaging with clean terminals.
Ships same or next business day from our Idaho warehouse. Honest pricing, no nonsense.
Online since 1999. We are here for our customers, with a no-hassle satisfaction guarantee.
Product Overview
Archer catalog number 275-243 is a vintage subminiature single-pole double-throw (SPDT, 1 Form C) electromechanical relay designed for direct printed circuit board mounting. Custom manufactured in Japan by Original Electric Co. for Radio Shack, this component features a 5VDC coil rated at 70 ohms resistance and 72 mA coil current. The internal switching contacts handle up to 2 amps at 125VAC, making it suitable for low-voltage logic control, vintage computing repairs, and custom hobbyist breadboard projects.
Key Features
- Contact Configuration: SPDT (1 Form C)
- Coil Operating Voltage: 5VDC
- Coil Resistance: 70 ohms
- Coil Current: 72 mA
- Contact Current Rating: 2A at 125VAC
- Mounting Style: Through-hole solder pins (5-pin PCB footprint)
- Pin Spacing: 2.54 mm and 10.16 mm terminal pitch with 7.62 mm row spacing
- Manufacturing: Custom manufactured in Japan for Radio Shack
Applications
- Soldering directly into vintage 1980s and 1990s audio receivers or computerized control boards requiring factory-spec coil resistance.
- Interfacing 5V microcontroller logic outputs (such as TTL or Arduino lines) to drive secondary 120VAC peripheral loads.
- Restoring classic Radio Shack, Tandy, or Archer electronics kits and legacy project builds to period-accurate specifications.
Frequently Asked Questions
Can this relay be triggered directly by a standard 5V digital logic pin?
The 5VDC coil requires 72 mA at 70 ohms resistance. Most microcontroller output pins are limited to 20 mA to 40 mA, so an external switching transistor or driver IC is recommended to safely energize the coil.
What are the pin dimensions and lead spacing?
The terminal layout utilizes standard through-hole grid dimensions with 2.54 mm and 10.16 mm pin intervals across a 7.62 mm row width, matching standard perfboard and dedicated PCB pads.
Why choose this individually documented vintage unit over bulk surplus assortments?
Buying an individual, factory-sealed Archer card guarantees you receive the exact catalog specification and pinout needed without sifting through untested salvage lots. Domestic orders ship flat rate for $8, or ship free when your order reaches $28 or more, with every package dispatched same or next business day from our Idaho warehouse.
Nothing quite matches the reliable click of a genuine vintage Japanese relay when bringing a period-accurate Tandy circuit back to life.
Shipping? $8 flat rate, free once your order passes $28 - and it leaves the Idaho warehouse the same or next business day.
