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Siemens 3VM9988-0AA12 — Molded Case Circuit Breakers (MCCB)

SENTRON 3VM9988-0AA12 Auxiliary Switch, 6 A Thermal, 30×7×56

MPN3VM9988-0AA12
Active

SENTRON 3VM9988-0AA12 auxiliary switch, changeover contacts type HQ, 7 mm width, 6 A thermal, for 3VM circuit breakers.

Siemens 3VM9988-0AA12 datasheet (PDF)
StockContact for availability
MOQ1 pcs
Sourced new & surplus through independent channelsListing updated Jul 2026

Specifications

Identification

3VM9988-0AA12 — Identification
ParameterValue
Product designationauxiliary switch
Brand / rangeSENTRON

Mechanical

3VM9988-0AA12 — Mechanical
ParameterValue
Height56 mm
Width7 mm
Depth30 mm

Product details

The SENTRON 3VM9988-0AA12 is an auxiliary switch with changeover contacts (type HQ) designed as an accessory for 3VM circuit breakers. It carries a 6 A thermal current rating and fits a 7 mm wide slot in the breaker assembly.

Switching ratings by duty

Rated for AC-12 (resistive) at 6 A up to 240 V, and AC-15 (inductive) at 3 A across the same voltage range. On the DC side, DC-12 (resistive) handles 6 A at 12 V, 4 A at 24 V, and 2 A at 48 V; DC-13 (inductive) drops to 1 A at 12 V, 0.8 A at 24 V, and 0.4 A at 48 V. At higher DC voltages the ratings scale down further — 0.5 A at 110 V DC-12, 0.2 A at 110 V DC-13.

Environmental and electrical robustness

Rated for pollution degree 3 and overvoltage category III, with surge voltage resistance of 4 kV. Minimum operating voltage is 250 V DC. The stripped length is 15 mm (0.6 in).

Frequently asked questions

Who supplies 3VM9988-0AA12 and how is it quoted for volume purchases?

The 3VM9988-0AA12 is sourced and quoted to order against an RFQ through independent distribution. Volume pricing and availability are confirmed at quote time.

What is 3VM9988-0AA12's listed depth (30 mm) on this component line?

The 3VM9988-0AA12 has a depth of 30 mm.

What is 3VM9988-0AA12's listed width (7 mm) on this component line?

The 3VM9988-0AA12 has a width of 7 mm.

Will 3VM9988-0AA12 drop into a panel that was specified around 5SY6020-7KL without rewiring?

No. The 3VM9988-0AA12 is a dedicated auxiliary switch for SENTRON 3VM circuit breakers, while 5SY6020-7KL is a miniature circuit breaker from a different series. They are not mechanically or electrically interchangeable without panel redesign.

What compliance documentation does this brand provide for 3VM9988-0AA12 (RoHS, REACH, UL, IEC)?

The 3VM9988-0AA12 is a SENTRON accessory designed for 3VM breakers. Compliance documentation (RoHS, REACH, UL, IEC) is available from the manufacturer upon request; the part carries pollution degree 3 and overvoltage category III ratings per IEC 60947.

MPN
3VM9988-0AA12