500W Zener TVS in a Hermetic SQ-MELF
The 5.7V reverse standoff voltage and 7.13V minimum breakdown voltage define the clamping threshold; the maximum clamping voltage at 44.6A peak pulse current is 11.2V. This part is specified across the full -55°C to 175°C junction temperature range, making it suitable for avionics, downhole, and military-grade power rails where the ambient can exceed 125°C.
SQ-MELF Package and Mounting Considerations
Housed in a SQ-MELF, B (surface-mount) package — a hermetic ceramic body with metallized end caps. The B suffix indicates the bidirectional configuration. This package is common in high-reliability and space-grade designs because the hermetic seal prevents moisture ingress and the end-cap solder joints tolerate thermal cycling better than a plastic SMD. The supplier device package is listed as B, SQ-MELF. The mounting surface must be flat and the solder profile matched to the end-cap metallization — typically a 60/40 or SAC305 reflow with a peak temperature around 245°C.
Active Production — Sourcing and Lifecycle
The base product number is 1N6103. No official successor or cross-reference is published — the 1N6103AUS is the standard offering in this voltage and package combination.