Circuit Protection Devices

Altech circuit protection devices include UL 489/1077 breakers, RCCBs, and motor starters—offering reliable short-circuit, overload, and earth leakage protection.

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Altech / Doepke Breakers

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In today’s very competitive marketplace you need reliability, so you need to use circuit breakers that are high quality and technically correct for your application. Altech is a US leader in DIN rail mounted breakers with ratings up to 63A. Only Altech offers DIN rail mounted breakers that meet UL489, UL508 or UL1077 approvals with a short circuit interrupt capacity of up to 10kA. No other manufacturer offers this complete line. This assures you the right product for your application requirements

UL489
When you need branch circuit protection, Altech offers UL489 Miniature Molded Case Circuit Breakers in both AC and DC voltages. The AC version offers dual voltage rated circuit breakers at 0.2-63A/240VAC and 0.2-32A/480Y/277VAC in 1-3 poles. The DC version offers 0.2-63A at 125V (1 pole) and 250V (2 pole).

UL508
If your application requires a manual motor controller, Altech is the leading US supplier of UL508 Manual Motor Controllers (MMC). In AC, we offer up to 60A in 1 to 3 poles at 480Y/277VAC. With 6 trip curves, Altech has the largest selection in the industry. This ensures you the selectivity you require for your application designs. Our MMCs have a 10kA short circuit withstand capacity, this is the highest rating in the industry. The AC version is rated up to 60A and is DC rated in 2 poles up to 80VDC.

UL1077
When your application requires supplemental protection for control circuits and on the load side of branch circuit protectors Altech has solutions. We offer a competitive line of AC Supplementary Protectors, up to 63A, in 1 to 3 poles at 480Y/277VAC with a 10kA short circuit withstand rating.

L - Series UL 489 Miniature Molded Case Circuit Breakers

Temporarily unavailable/ long lead time item

Available in AC and DC models
DIN Rail Mounted
17.5mm width
Thermal Magnetic
240V, 480Y/277V AC, 50/60Hz
125VDC (1 pole); 250VDC (2pole)
10kA Short Circuit
Interrupting Capacity
Positive Trip indicator
(Green - off/tripped, Red - on)
HACR Type 40°C
Line/Load reversible

UL(AC), DL(DC) - Series UL489 Miniature Molded Case Circuit Breakers

Available in AC and DC models
DIN Rail Mounted
17.5mm width
Thermal Magnetic
240V, 480Y/277V AC, 50/60Hz
125V DC (1 pole); 250V DC (2pole)
10kA Short Circuit
Interrupting Capacity
HACR Type 40°C
Line/Load reversible

M - Series Manual Motor Controller with Disconnecting Mean UL508 Listed Circuit Breakers

Temporarily unavailable/ long lead time item

DIN Rail Mounted
17.5mm width per pole
Thermal Magnetic
480Y/277V AC, 50/60Hz
10kA Short Circuit Withstand Capacity
Line / Load Reversable
Positive Trip indicator (Green - off/tripped, Red - on)

UR - Series UL1077 Recognized Supplementary Protector

DIN Rail Mounted
17.5mm width per pole
Thermal Magnetic
0.3-60A / 480Y/277V AC, 50/60Hz
10kA Short Circuit
Withstand Capacity
Applications (on the load side
of Branch Circuit Protection)
include: Sensitive Electronics,
Power Supplies, Appliance
circuits, etc.

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Circuit Protection Devices

Altech Breakers

Altech / Doepke Breakers

Breaker Comparison

Shortform Catalog

L - Series UL 489 Miniature Molded Case Circuit Breakers

Temporarily unavailable/ long lead time item

UL(AC), DL(DC) - Series ﻿﻿﻿ UL489 Miniature Molded Case Circuit Breakers

M - Series Manual Motor Controller with Disconnecting Mean UL508 Listed Circuit Breakers

Temporarily unavailable/ long lead time item

UR - Series ﻿﻿﻿﻿UL1077 Recognized Supplementary Protector

UL(AC), DL(DC) - Series UL489 Miniature Molded Case Circuit Breakers

UR - Series UL1077 Recognized Supplementary Protector