55 Series 10mm Barrier Terminal Blocks for 0.5-4mm²

55C A Centered Pin Terminal with Mounting Ears

Series Part Number

Part Number:	ULO	-	TB41	-	55	C	/	A	-	02	P	-	3	1	0	0A
Explanation:	Brand		Series Code		Model Family 55 - 10mm single-row barrier terminal block	Tail Configuration C - Centered straight pins S - Offset straight pins H - Extended eyelet lugs R - Bent tails		Mounting Ends A - Mounting ears B - Compact ends without ears		Positions 02-24 - Two to twenty-four positions, written as two digits	Position Unit P - Position-count suffix		Color 1 - Grey 2 - Blue 3 - Black 4 - Green 5 - Orange 6 - Red 7 - Transparent 8 - Yellow 9 - White	Screw Head 1 - Cross-head screw in the illustrated ordering suffix	Clamping 0 - Screw-down clamping in the illustrated ordering suffix	Product Version 0A - Standard product

Description

Choose the tail and mounting configuration

The 55 series provides one row of screw connections at 10mm pitch, with 2-24 positions. C versions have centered straight pins, S versions have offset straight pins, H versions have extended eyelet lugs, and R versions have bent tails. /A bodies include mounting ears; /B bodies have compact ends without ears. The illustrated terminals are uncovered.

Model	Tail style	Mounting ears	Overall body length, mm
ULO-TB41-55C/A	Centered straight pins	Yes	10×(N+2)
ULO-TB41-55C/B	Centered straight pins	No	10×N+2.38
ULO-TB41-55S/A	Offset straight pins	Yes	10×(N+2)
ULO-TB41-55S/B	Offset straight pins	No	10×N+2.38
ULO-TB41-55H/A	Extended eyelet lugs	Yes	10×(N+2)
ULO-TB41-55H/B	Extended eyelet lugs	No	10×N+2.38
ULO-TB41-55R/A	Bent tails	Yes	10×(N+2)
ULO-TB41-55R/B	Bent tails	No	10×N+2.38

N denotes the number of positions, from 2 to 24. All bodies are 16.50mm deep and 18.50mm high, excluding tails. The central terminal section on /A versions is 10×N+2.38mm long.

IEC ratings

All eight versions have a rated current of 32A. Select the voltage for the applicable overvoltage category and pollution degree. A value marked not specified is not an additional voltage rating.

Models	III / pollution degree 3		III / pollution degree 2		II / pollution degree 2
Models	Rated voltage	Impulse voltage	Rated voltage	Impulse voltage	Rated voltage	Impulse voltage
55C/A, 55C/B, 55S/A, 55S/B	Not specified	8kV	320V	8kV	Not specified	8kV
55H/A, 55R/A, 55R/B	Not specified	6kV		6kV	Not specified	6kV
55H/B	320V	6kV		6kV	600V	6kV

UL use-group ratings

Parameter	Use group B	Use group D
Rated current	20A	10A
Rated voltage	300V
Wire range	22-12AWG

Wiring, materials and operating conditions

Parameter	Value
Positions / rows / pitch	2-24 / 1 / 10mm
Connection method	Screw connection
Solid conductor cross section	0.5-4mm²
Flexible conductor cross section	0.5-4mm²
Flexible conductor with ferrule	0.5-4mm²
Clamping screw / tightening torque	M3.5 / 0.8N·m
Protection level	IP20
Operating temperature	-40°C to 105°C
Housing / material group / flammability	PA66 / I / UL94V-0
Contacts	Tin-plated copper alloy
Solder tails	Tin-plated brass
Screws	Nickel-plated steel
Environmental compliance	RoHS

Tail dimensions and layouts

Dimensions in the table below are in millimetres. The first-to-last tail span is 10×(N-1)mm. /A mounting ears have Ø3.50mm holes with Ø5.50mm recesses. Use the model drawing for tail direction and the complete outline.

Tail style	Section or width	Tail length or extension	Position and hole details
C	1.5×0.8	5±0.3	Centered pin row; PCB holes Ø2.2
S	1.5×0.8	5±0.3	Pin row 4.05 from the near body edge; PCB holes Ø2.2
H	3.5×0.8	12.5±0.3	Eyelet opening 2×2.5
R	Shoulder width 3.5; tip width 1.5; thickness 0.8	Horizontal extension 5±0.3; outside drop 5.3±0.3	PCB holes Ø2.2

55C/A outline and centered pin layout — 55C/A centered straight pins with mounting ears.

55C/B outline and centered pin layout — 55C/B centered straight pins without mounting ears.

55S/A outline and offset pin layout — 55S/A with mounting ears. The section view specifies the 4.05mm pin-row edge distance; the PCB sketch indicates pitch and hole diameter.

55S/B outline and offset pin layout — 55S/B without mounting ears, including the 4.05mm PCB edge distance.

55H/A outline and eyelet lug dimensions — 55H/A with mounting ears and extended eyelet lugs. The 55H/B version uses the compact body length listed above; see its attached drawing.

55R/A outline and bent tail dimensions — 55R/A with mounting ears and bent tails.

55R/B outline and bent tail dimensions — 55R/B without mounting ears, with 5±0.3mm tail extension.

General drawing tolerances

Specific tolerances beside dimensions take precedence. Values below are in millimetres.

Dimension range	Total pitch tolerance	Nominal dimension tolerance
0-30	±0.18	±0.20
Over 30-53	±0.20	±0.25
Over 53-70	±0.25	±0.30
Over 70-90	±0.30	±0.35
Over 90-115	±0.35	±0.44
Over 115-150	±0.44	±0.55
Over 150-200	±0.55	±0.70
Over 200-250	±0.70	±0.80
Over 250-320	±0.75	±0.90

Geometric tolerance	Range or condition	Tolerance
Perpendicularity	Up to 10mm / over 10mm	0.2mm / 0.3mm
Symmetry	All	0.3mm
Straightness	Up to 100mm	0.2mm
Parallelism	100-150mm / over 150mm	0.3mm / 0.5mm

Ordering

Use the order form ULO-TB41-55C/A-XXP-Y100A, replacing 55C/A with the required version, XX with 02-24 positions and Y with the color code. The illustrated 100A ending selects a cross-head screw, screw-down clamping and the standard 0A product configuration.

Code	Color
1	Grey
2	Blue
3	Black
4	Green
5	Orange
6	Red
7	Transparent
8	Yellow
9	White

55 Series 10mm Barrier Terminal Blocks