What is the difference between Panasonic relay tq2- 12v and TQ2- 12V?

Brand: Panasonic model: signal relay series: TQ series number: TQ2-5V overall dimensions (mm): 14.0× 9.0× 5.0 mm (length× width× height) Weight: 1.5g Contact parameters: contact form: 2C(DPDT) Contact load: 6544.