Mersen A50P Amp-Trap Form 101 High Speed Fuse Series | 500 VAC

Mersen ATMR is an Amp-Trap® Class CC fast-acting power fuse series for general circuit and branch circuit protection. The manufacturer lists 26 current ratings from 1/10 A through 30 A, with a shared 600 VAC/DC rating. Across the series, the interrupting rating is 200 kA AC and 100 kA DC. ATMR fuses use Class CC rejection-style dimensions intended to help prevent replacement with lesser-rated fuses when used with recommended fuse blocks. This series page provides procurement teams with a structured way to compare the exact catalog numbers by rated current while reviewing the electrical ratings and standards shared across the ATMR family.

ATMR Series Overview

The ATMR family combines fast-acting operation with current-limiting protection for general circuits. Mersen identifies the series for individual component and branch circuit protection, including applications where available short-circuit current may exceed 10,000 amperes. The Class CC rejection design is an important consideration when selecting replacement fuses and matching them to the required fuse holder or fuse block.

Technical Specifications

Specification	Series Rating
Manufacturer family	Amp-Trap® ATMR
Fuse class	Class CC
Rated voltage	600 VAC / DC
Current range	1/10 to 30 A
Interrupting rating	200 kA AC; 100 kA DC
Operating characteristic	Fast acting; current limiting
UL listing	UL 248-4, File E2137; DC listed to UL 248
CSA certification	C22.2 No. 248.4

ATMR Model Selection

The ATMR datasheet lists 26 rated-current options from 1/10 A through 30 A. Select the required model according to the circuit's specified current rating while retaining the required 600 VAC/DC Class CC characteristics and applicable interrupting rating. Confirm the complete catalog number and verify the rejection-style Class CC fuse-holder or fuse-block fit before replacement. The table below maps each manufacturer catalog number to its stated amp rating.

Variant Model Matrix

Exact Model / MPN	Rated Current
ATMR1/10	1/10 A
ATMR1/8	1/8 A
ATMR2/10	2/10 A
ATMR1/4	1/4 A
ATMR3/10	3/10 A
ATMR1/2	1/2 A
ATMR3/4	3/4 A
ATMR1	1 A
ATMR1-1/4	1-1/4 A
ATMR1-1/2	1-1/2 A
ATMR2	2 A
ATMR2-1/2	2-1/2 A
ATMR3	3 A
ATMR3-1/2	3-1/2 A
ATMR4	4 A
ATMR5	5 A
ATMR6	6 A
ATMR7	7 A
ATMR8	8 A
ATMR9	9 A
ATMR10	10 A
ATMR12	12 A
ATMR15	15 A
ATMR20	20 A
ATMR25	25 A
ATMR30	30 A

Verified Applications

Control circuits
Lighting
General loads
Branch circuit protection

Mersen also identifies ATMR as a choice for protection of control circuits and control circuit transformers where available short-circuit currents exceed 10,000 amperes.

B2B Sourcing and Replacement Support

Apexon Supply provides B2B sourcing support for the Mersen ATMR series for procurement, maintenance, OEM, integration, and industrial replacement requirements. Confirm the required rated current, 600 VAC/DC rating, Class CC requirements, interrupting rating, and mechanical fit before replacing an installed fuse.

For RFQ review, submit the complete MPN, required current rating, quantity, and application or replacement details. Apexon Supply can assist with exact-model sourcing and technical alignment without implying interchangeability with other fuse families.

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Mersen A50P Amp-Trap Form 101 High Speed Fuse Series, 500 VAC / 450 VDC, 100 kA AC I.R.