STTB Double Level Spring Cage DIN Rail Terminal Blocks
Series Part Number
Part Number:
ULO
-
TB254
-
STTB 2.5 BU
Explanation:
Brand
Product Code
TB254 - STTB2.5 models TB130 - STTB4 model
Terminal and Color
STTB 2.5 BU - Blue double-level terminal, 2.5mm² nominal cross-section; TB254 only STTB 2.5 - Gray; BU and its preceding space omitted; TB254 only STTB4 - Listed gray double-level model; TB130 only; all versions have four connections and two independent potentials
Description
Two independent feedthrough levels
STTB terminals provide two levels, four spring-cage connections and two independent electrical potentials. Each level connects one pair of conductors. STTB2.5 and STTB4 differ in current rating, conductor capacity and outline dimensions; both mount on NS35/7.5 DIN rail.
Property
STTB2.5
STTB4
Model
ULO-TB254-STTB2.5
ULO-TB130-STTB4
Nominal cross section
2.5mm²
Not separately specified
Nominal current
22A
30A
Maximum load current
26A
Not specified
Rated voltage; category III, pollution degree 3
500V
Impulse voltage; category III, pollution degree 3
6kV
Voltage and impulse ratings; III / 2 and II / 2
Not specified
Operating temperature
-60°C to +110°C
-40°C to +105°C
Housing colors
Gray; blue with BU suffix
Gray
Conductor preparation
Connection property
STTB2.5
STTB4
Solid conductor
0.08–4mm²; 28–12AWG
0.08–6mm²
Flexible conductor
0.08–2.5mm²; 28–14AWG
0.08–4mm²
Flexible conductor with ferrule
0.14–2.5mm²
0.14–4mm²
Stripping length
8–10mm
Clamping method
Spring cage
Clamping screw / tightening torque
Not applicable
UL use-group ratings
Model
Use group B
Use group C
Use group D
Conductor range
STTB2.5
20A / 600V
Not specified
28–12AWG
STTB4
30A / 300V
Not specified
28–10AWG
Materials and protection
Property
Both models
Insulation / material group
PA66 / I
Flammability
UL94V-0
Contacts
Tin-plated copper alloy
Protection
IP20
Outline and mounting dimensions
Dimension
STTB2.5
STTB4
Width × length × overall height
5.15×67.6×45.9mm
6.2×83.5×47.5mm
Top to rail-seat datum
39.9mm
41.5mm
Rail centerline to right end
35.5mm
43.6mm
Half rail width
17.5mm
STTB2.5: 5.15mm width, 67.6mm length and 45.9mm overall height, with a 39.9mm top-to-rail-seat dimension.STTB4: 6.2mm width, 83.5mm length and 47.5mm overall height. The rail centerline lies 43.6mm from the right end.
