Mounting Base Selection Guide

Base Model

Loop

Current

Alarm

Nominal

Current Draw

Number

Version

Type

Limit Resistor

Contact Type

Voltage

on Alarm (mA)

B401B

UL/ULC

2-wire*

No

—

12/24VDC††

10–100**

B401BR

UL/ULC

2-wire*

Yes

—

24VDC

10–62

B402B

UL/ULC

4-wire

Yes

Form A&C

24VDC

14–39

B404B

UL/ULC

4-wire

Yes

Form A&C+A

120VAC

75 mA AC Max

Supervisory

B406B

UL/ULC/EN-54 2-wire*

No

Form C

24VDC

12–100**

B401†

UL/EN-54

2-wire*

No

—

12/24VDC††

10–100**

B401R†

EN-54

2-wire*

Yes

—

24VDC

10–62

*Functionality contingent on panel compatibility.

**Must be limited by control panel.

Operating Voltage/Alarm Current:

Mounting base dependent (see chart

on page 2)

Standby Current:

Ion:

120 µA maximum

Thermal:

100 µA maximum

Sensitivity:

1.9% + ±6%/ft. Ion

Weight:

1451:

0.5 lb. (227 gm)

5451:

0.3 lb. (136 gm)

Size:

3.2”/8.1 cm height

4.0”/10.2 cm diameter,

unflanged base

6.2”/15.7 cm diameter,

flanged base

Construction:

Flame retardant Noryl plastic

Operating Temperature:

1451:

32°F to 120°F (0°C to 49°C)

5451:

32°F to 100°F (0°C to 38°C)

Alarm Point, Thermal:

135°F (57.2°C) or 15°F/min.

rate of rise

Humidity Range:

10 – 93% RH non-condensing

Air Velocity Rating:

Ionization: 1200 fpm maximum

Smoke Detector Spacing:

For ion detectors on smooth ceilings

(as defined in NFPA 72), spacing of

30 feet (900 sq. ft.) may be used

as a guide. For thermal detectors on

smooth ceilings (as defined in NFPA

72), spacing of 50 feet (2500 sq. ft.)

may be used. Other spacing may be

used depending on ceiling height, high

air movements, and other conditions

or response requirements.

Specifications

Junction Box Selection Guide*

Single

Gang

3.5” Octagon

4” Octagon

4” Square

50 mm

60 mm

75 mm

B401/B401R

No

No

No

No

Yes

Yes

No

B401B/BR

Yes

Yes

Yes

Yes

No

No

No

B402B/B406B Yes

Yes

Yes

Yes

Yes

Yes

Yes

B404B

No

No

Yes

Yes

No

No

No

* Box depth contingent on base and wire size.

Refer to National Electrical Code of local applicable codes for appropriate recommendations.

Relay Contact Ratings:

Resistive or Inductive

(60% power factor) load.

Form A:

2.0A at 30 VAC/DC

Form C:

0.6A at 110VDC, 2.0A at 30VDC

1.0A at 125VAC, 2.0A at 30VAC

†Flangeless base

†† Although B401B and B401 bases are capable

of operating at 12 and 24 VDC, they cannot be

used with the 5451 in 12 V applications.