Technical Data · Publication 400DP-TD001 · Rockwell Automation

Allen-Bradley Bulletin 400 Definite Purpose Contactors — Technical Data

Product-selection and specification data for the Allen-Bradley Bulletin 400 Definite Purpose (DP-series) contactors — 1-, 2-, 3-, and 4-pole devices rated 20/25…90 A at 600V max. Typical applications include air-conditioning, refrigeration, resistive heating, data-processing, food-service equipment, pumps, and compressors. Mirrored from Rockwell Automation Publication 400DP-TD001B-EN-P (July 2025).

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400DP-TD001 Publication
400 Bulletin
20/25 FLA Range
600V AC Max System Voltage

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Specifications

Electrical — Ratings & Construction

Full load current ranges 1-pole 20/25…40 A; 2-pole 20/25…40 A; 3-pole 20/25…90 A; 4-pole 20/25…40 A
Maximum system voltage 600V AC
Coil insulation class Class B (130 °C)
Coil frequency 50/60 Hz
Contact construction Double-break contacts, double 'E' magnet assembly
Short-circuit current rating (SCCR) Standard and high-fault SCCR options per product series
UL test coverage UL tested for lighting loads (in addition to motor/resistive duty)

Available Coil Voltages

24V (code J) 50/60 Hz AC
120V (code D) 50/60 Hz AC — most common HVAC coil
208/240V (code A) 50/60 Hz AC
277V (code F) 50/60 Hz AC
347V (code LF) 50/60 Hz AC
480V (code B) 50/60 Hz AC

Mechanical / Mounting

Termination — 20/25–40 A #10-32 screw with 1/4 in. quick-connect (QC) standard; box lugs optional
Termination — 50…90 A Box lug standard; ring-terminal option available
Arc cover — 1-pole / 2-pole Optional
Arc cover — 3-pole / 4-pole Standard
Auxiliary contacts Snap-on; max two aux blocks (one per side) for up to four aux contacts
Mounting options Steel back plate (20/25, 30, 40 A) and molded back plate (4-pole 20/25–40 A); integrated DIN-rail / panel-mount with pass-through wiring (option AB5)
Coil-terminal orientation Line-side standard; load-side (T1/2, T2/4, T3/6) and down-oriented options available

Environmental & Applications

Typical applications HVAC/R, pumps, compressors, resistive heating, data-processing, food-service equipment, lighting loads
Refrigerant compatibility A2L refrigerant certified (safety-rated for mildly-flammable refrigerant service)
Accessories Factory-attached 400-DRA (DP25/30/40 A), pneumatic/electronic timers (4-pole 20/25–40 A), auxiliary SPDT and 1 N.O./1 N.C. blocks, ring-terminal kits

Catalog Number Format

How to read an Allen-Bradley 400 catalog number. Each position encodes a specific configuration attribute.

Position
Meaning
Example
400
Bulletin prefix — Definite Purpose contactor family
400
-DP##
Current rating (DP25 = 20/25 A, DP30 = 30 A, DP40 = 40 A, DP50 = 50 A, DP60 = 60 A, DP75 = 75 A, DP90 = 90 A)
DP40 = 40 A full-load amps
N
Enclosure code (N = no enclosure / open construction)
N = open
Coil code
Nominal coil voltage (J=24V, D=120V, A=208/240V, F=277V, LF=347V, B=480V — all 50/60 Hz)
A = 208/240V 50/60 Hz
Pole count
Number of poles (1, 2, 3, or 4). 50 A and above are 3-pole only.
3 = three-pole
-Modifier
Option suffix (-B box lug in 2nd position, -D factory-attached 400-DRA, -E 2-pole on 3-pole base, -K coil terminal in 2nd position, -R accept ring terminal, -S #10-32 SEMS terminal, aux-contact codes A/A1/A2/AB/AB1/AB5/A5/AA5)
-K = #6-32 screw coil terminal with DP25/30/40 in 2nd position

Certifications & Compliance

UL Recognized (File No. E3125, Guide No. NLDX2) CSA Certified (File No. 221970) CE Marked — SEMKO Certified CCC (China Compulsory Certification) A2L Refrigerant Certified

Document Contents

Full PDF covers the following topics in detail:

  • Product overview by pole count (1/2-pole, 3-pole 25…40 A, 3-pole 50…90 A, 4-pole)
  • Catalog-number explanation with current-rating, coil-voltage, pole, and modification codes
  • Product selection tables with FLA rating, arc cover, termination style, and certification coverage
  • Accessories and modifications — auxiliary contacts (SPDT / 1 N.O.-1 N.C.), ring-terminal kits, factory-attached 400-DRA, timers
  • Approximate dimensional drawings for every pole/FLA combination
  • A2L refrigerant standards-compliance section
  • Additional resources — installation instructions and related publications

Frequently Asked Questions

What current ratings does the Bulletin 400 DP contactor family cover?
Bulletin 400 DP contactors are available from 20/25 A up to 90 A full-load amps at 600V max. 1-, 2-, and 4-pole devices top out at 40 A; only the 3-pole DP-series extends to 50, 60, 75, and 90 A. The catalog current codes are DP25, DP30, DP40, DP50, DP60, DP75, and DP90 (Publication 400DP-TD001, Catalog Number Explanation, p. 5).
Is the Bulletin 400 contactor certified for A2L refrigerant applications?
Yes. The July 2025 revision of 400DP-TD001 (Rev B) added A2L certification across 2-pole DP25–40, 3-pole DP25–40, 3-pole DP50–90, and 4-pole DP25–40 ranges. A2L certification is required for new HVAC/R equipment using mildly-flammable refrigerants (R-32, R-454B, R-1234yf, etc.) under UL 60335-2-40.
Which coil voltages are available on the Bulletin 400 DP contactor?
Standard coil codes include 24V (J), 120V (D), 208/240V (A), 277V (F), 347V (LF), and 480V (B), all 50/60 Hz. 120V AC and 24V are the most common OEM HVAC coils; 277V and 347V are used on Canadian commercial lighting and rooftop-unit control circuits.
When are box lugs standard versus optional on the Bulletin 400?
Box lugs are standard on all 40 A and larger devices. On 20/25–30 A devices, the standard termination is a #10-32 screw with 1/4 in. quick-connect; box lugs are available as an option (suffix B). 50…90 A 3-pole devices are box-lug standard with an optional ring-terminal kit.
Can auxiliary contacts be added in the field to a Bulletin 400 contactor?
Yes. Snap-on auxiliary blocks mount on either side of the contactor for a maximum of two blocks (four aux contacts). Options include 1 N.O./1 N.C. with quick-connect (AB/AB1), SPDT with quick-connect (A/A1/A2), integrated panel-mount with pass-through wiring (AB5), and 2 SPDT (AA5). Some suffix options are specific to pole count or FLA range — see Publication 400DP-TD001, p. 5, note 3.
What's the short-circuit current rating (SCCR) of a Bulletin 400 contactor?
The Bulletin 400 DP family is offered with both a standard and a high-fault SCCR. Actual values depend on the FLA rating and the upstream branch-circuit protection; consult the Bulletin 400 selection guide or the device label for exact SCCR when sizing motor controllers and HVAC panels.

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