The Second Divine Emanation
Saṅkarṣaṇa ('drawing together,' 'contracting') is the second of the four Vyūhas, emanating from Vāsudeva. In the Pañcarātra cosmological scheme, Saṅkarṣaṇa is associated with the realm of conscious beings (jīvas) — both in the sense of embodying the principle of consciousness and in the sense of managing the dissolution (saṃhāra) phase of the cosmic cycle.
Divine Qualities
Saṅkarṣaṇa specifically manifests two of the six divine qualities: jñāna (omniscience) and bala (infinite strength). The knowledge associated with Saṅkarṣaṇa is particularly the knowledge of the ātman's nature and its relationship to Brahman. The strength is the power to sustain all of creation and to accomplish the withdrawal of creation into Brahman at the time of dissolution.
Identification with Balarāma
Saṅkarṣaṇa is identified with Balarāma (Kṛṣṇa's elder brother) in the Vibhava (avatāra) realm and with Ādiśeṣa in some texts. This identification connects the cosmic Vyūha principle with the concrete historical figure of Balarāma, who embodies strength, dharmic rectitude, and fraternal love.
Cosmic Dissolution
Saṅkarṣaṇa's role in cosmic dissolution is his most distinctive: at the end of the cosmic cycle, it is Saṅkarṣaṇa who withdraws the universe back into Brahman. The name itself ('drawing together/contracting') points to this function: He gathers creation back into the source.