Technical Data · Publication 1489-TD001 · Rockwell Automation

Allen-Bradley Bulletin 1489 UL 489 Miniature Circuit Breakers Technical Data

Specifications, trip-curve data, temperature derating, let-through energy, and catalog information for the Allen-Bradley Bulletin 1489-A (AC) and 1489-D (DC) UL 489 Listed industrial miniature circuit breakers. Mirrored from Rockwell Automation Publication 1489-TD001.

Download PDF
1489-TD001 Publication
1489 Bulletin
0.5 Current Range
1, 2, or 3 Poles

Document Preview

Open the full PDF in a new tab  · Publication 1489-TD001

Specifications

Electrical Ratings

Rated tripping current (In) 0.5 – 40 A (UL/CSA); 0.5 – 40 A (EN/IEC)
Number of poles 1, 2, or 3
Rated voltage (1489-A, AC) UL/CSA: up to 480Y/277V AC (0.5–32 A), 240V AC (0.5–40 A), 48V DC 1-pole, 96V DC 2-pole; EN/IEC: 415V AC, 48V DC
Rated voltage (1489-D, DC) UL/CSA: 125V DC 1-pole, 250V DC 2-pole; EN/IEC: 250V DC 1-pole, 500V DC 2-pole
Rated interrupting capacity (1489-A) EN/IEC Icu: 15,000 A; UL/CSA: 10,000 – 14,000 A (depends on In and trip curve)
Rated interrupting capacity (1489-D) EN/IEC Icu: 10,000 A; UL/CSA: 10,000 A (Type C, 2–40 A)
Dielectric strength 1,960 V AC
HACR rating (1489-A) Yes (heating, air-conditioning, refrigeration)
SWD rating (1489-A) Yes (0.5 – 20 A) — suitable for switching fluorescent lighting loads

Trip Curves

C curve (1489-A and 1489-D) Inductive loads; instantaneous trip at 5–10 × In per IEC 60898-1
D curve (1489-A only) Highly inductive loads (transformer primaries, solenoids, motor starting); instantaneous trip at 10–20 × In per IEC 60898-1
UL 489 trip behavior Conventional non-trip Int = 1.0 × In (at T = 40 °C); conventional trip It = 1.35 × In within 1 h (at 25 °C)
Calibration temperature UL/CSA: 40 °C; EN/IEC: 30 °C

Mechanical & Wiring

Degree of protection Finger-safe from front: IP20 per IEC 529; IP00 at wire terminals
Wire size 1 wire: #18–6 AWG; 2 wires: #18–10 AWG
Terminal torque #18–12 AWG: 21 lb·in; #10–8 AWG: 25 lb·in; #6 AWG: 36 lb·in (#2 PoziDriv)
Recommended wire strip length 0.5 in (12 mm)
Mounting 35 mm DIN rail

Environmental

Operating temperature -25 to +55 °C (-13 to +131 °F), non-condensing
Shipment and storage -40 to +85 °C (-40 to +185 °F)
Shock 25 G half-sine wave for 11 ms (3 axes)
Vibration 10–200 Hz; max. peak-to-peak amplitude 0.030 in; max. acceleration 5 G; 2 h each of 3 axes
Ambient derating Load factor Kt = 1.25 at -20 °C, 1.00 at 40 °C, 0.85 at 55 °C (see Figure 4 / Figure 17)

Catalog Number Format

How to read an Allen-Bradley 1489 catalog number. Each position encodes a specific configuration attribute.

Position
Meaning
Example
1489
Bulletin prefix (UL 489 industrial miniature circuit breaker)
1489
-A or -D
Family: A = standard AC breaker; D = DC breaker (M = UL 1077 supplementary, sold under separate publication)
A = AC
Trip curve letter
Trip characteristic: C = inductive (5–10 × In), D = highly inductive (10–20 × In, 1489-A only)
C
Pole count
Number of poles: 1, 2, or 3
2 = 2-pole
Rated current (In)
Device marked current rating at 40 °C: 0.5, 1, 1.5, 2, 3, 4, 5, 6, 7, 8, 10, 13, 15, 16, 20, 25, 30, 32, 35, or 40 A
D10 = 10 A

Certifications & Compliance

UL 489 Listed Circuit Breaker (File No. E197878) CSA C22.2 No. 5 Certified EN/IEC 60947-2 compliant VDE Certified (1489-A) CE Marked

Document Contents

Full PDF covers the following topics in detail:

  • Complete electrical specifications for 1489-A (AC) and 1489-D (DC) families — poles, voltage, rated current, interrupting capacity
  • UL/CSA and EN/IEC time-current trip curves for C (inductive) and D (highly inductive) characteristics
  • Power loss and internal resistance tables for every rated-current step from 0.5 A to 40 A, 1p / 2p / 3p
  • Ambient-temperature derating table (-25 °C to +55 °C) showing adjusted load-carrying capacity per UL 489 and IEC 60947-2
  • Maximum let-through energy (I²t) and peak let-through current curves for short-circuit coordination
  • Wiring specifications: wire size, terminal torque, strip length, IP ratings
  • Mechanical specs: shock (25 G / 11 ms) and vibration (10–200 Hz, 5 G peak) endurance
  • Catalog-number breakdown for 1489-A and 1489-D standard offerings

Frequently Asked Questions

What's the difference between the 1489-A and 1489-D circuit breakers?
The 1489-A is the standard AC industrial miniature circuit breaker, rated up to 480Y/277V AC (0.5–32 A) and 240V AC (0.5–40 A), with both C and D trip curves available. The 1489-D is purpose-built for DC applications, rated up to 125V DC 1-pole or 250V DC 2-pole per UL/CSA (and 250/500V DC per EN/IEC). The 1489-D is offered only with the C trip curve and in the 2–40 A range.
C curve vs. D curve — which should I pick?
Trip curve selects the instantaneous magnetic-trip threshold per IEC 60898-1. The C curve (5–10 × In) is the general-purpose choice for inductive loads — motors, contactors, small transformers. The D curve (10–20 × In) tolerates the much higher inrush of highly inductive or capacitive loads such as large control transformer primaries, welding equipment, and motor-starting duty, without nuisance-tripping on energization. Bulletin 1489 publishes C and D — the B curve (3–5 × In) used for resistive loads is not part of this family.
Is the Bulletin 1489 a UL 489 branch-circuit breaker or a UL 1077 supplementary protector?
Bulletin 1489 breakers are UL 489 Listed Industrial Circuit Breakers, meaning they are approved for branch-circuit protection under NEC Article 240. That is the key legal distinction from UL 1077 supplementary protectors (such as Rockwell Bulletin 1492-SP), which may look similar mechanically but are only permitted as supplementary protection downstream of a branch-circuit device. If the upstream protective device in a panel is a 1489, you can build the branch circuit around it; a UL 1077 device cannot do that job.
How much does ambient temperature affect the rating?
The device is calibrated at 40 °C (UL) / 30 °C (IEC). At higher ambients the load-carrying capacity derates — a 10 A breaker delivers roughly 9.6 A at 50 °C and 9.4 A at 55 °C. At lower ambients the capacity slightly increases (Kt = 1.25 at -20 °C). The full ambient-derating table in Publication 1489-TD001 gives adjusted ratings in 5 °C steps across the -25 to +55 °C range.
What interrupting capacity does the 1489-A provide?
Per EN/IEC 60947-2 the 1489-A carries an Icu rating of 15,000 A. Under UL/CSA the interrupt rating varies with rated current and trip curve: Type C at 0.5–13 A is 10,000 A, 15–25 A is 14,000 A, and 30–40 A is 10,000 A; Type D at 0.5–10 A is 10,000 A, 13–20 A is 14,000 A, and 25–40 A is 10,000 A. Use this data to confirm short-circuit coordination for the available fault current at the installation point.
Can I use a 1489-A on a DC bus?
The 1489-A is rated for limited DC duty — 48V DC 1-pole or 96V DC 2-pole per UL/CSA — which is fine for control-voltage circuits but insufficient for 125V, 250V, or 500V DC distribution. For those applications use the 1489-D, which is designed and certified for the higher DC voltages with appropriate arc-extinction construction.

Disclaimer

Disclaimer: PLC Exchange is an independent reseller and is not an authorized distributor, affiliate, licensee, partner, or agent of Allen-Bradley / Rockwell Automation. All product information on this page is compiled from publicly-available manufacturer publications, technical data sheets, and catalog sources, each of which remains the copyright of its originating manufacturer. We make no representation or warranty, express or implied, regarding the accuracy, completeness, timeliness, or fitness for any particular purpose of the specifications or descriptions shown — content may contain errors, omissions, or out-of-date information. Product images are the property of their respective manufacturers, trademark owners, and source publications, and are displayed solely for identification purposes under the nominative fair use doctrine; images are representative and may depict a different configuration or catalog variant than the exact product listed. Purchasers should independently verify specifications against the current manufacturer publication before placing an order. All product names, trademarks, service marks, and registered trademarks are the property of their respective owners, and their use does not imply endorsement or affiliation.