250 Spring Clamp PCB Terminals in 2.5mm to 3.5mm

Series Part Number

Part Number:	ULO	-	TB12	-	250	/	2.5	-	02	P	-	1	000A
Explanation:	Brand		Series Code TB12 - 250 at 2.5mm, or 250A and 250B at 3.5mm TB18 - 250 at 2.54mm		Model 250 - TB12 at 2.5mm or TB18 at 2.54mm 250A - TB12 at 3.5mm; illustrated 04P configuration uses 00HA 250B - TB12 at 3.5mm; uses 000A		Pitch 2.5 - 2.5mm; TB12-250 2.54 - 2.54mm; TB18-250 3.5 - 3.5mm; TB12-250A or TB12-250B		Poles 02–24 - Two-digit pole count from 2 to 24 for 250 and 250B 04 - Four poles in the illustrated 250A configuration with 00HA	Pole Suffix		Colour 1 - Grey; illustrated housing colour 2 - Blue 3 - Black 4 - Green 5 - Orange 6 - Red 7 - Transparent 8 - Yellow 9 - White; confirm availability of the selected model and colour combination	Customer Requirements 000A - Standard suffix shown for 250/2.5, 250/2.54 and 250B/3.5 00HA - Suffix shown for the illustrated 250A/3.5 four-pole configuration

Description

Spring termination with staggered PCB pins

250 terminal blocks use straight-through spring wire connections with individual release actuators. Each assembly has one row of circuits and 2–24 poles. Solder pins alternate between two PCB rows; select the exact pitch and A or B model before laying out the board.

Model	Pitch	IEC rated current	IEC conductor cross section	UL wire range
TB12-250/2.5	2.5mm	2A	0.2–0.5mm²	24–20AWG
TB18-250/2.54	2.54mm	2A	0.2–0.5mm²	24–20AWG
TB12-250A/3.5	3.5mm	10A	0.2–1.5mm²	22–16AWG
TB12-250B/3.5	3.5mm	10A	0.2–1.5mm²	22–16AWG

Electrical ratings

Models	Overvoltage category	Pollution degree	Rated voltage	Rated current	Rated impulse voltage
250/2.5 and 250/2.54	III	2	250V	2A	2kV
250A/3.5 and 250B/3.5		3		10A	2.5kV
		2
	II	2	320V

For the 2.5mm and 2.54mm models, ratings under category III/pollution degree 3 and category II/pollution degree 2 are unspecified.

Models	UL use group B	UL use group C	UL use group D
250/2.5 and 250/2.54	2A, 300V
250A/3.5 and 250B/3.5	8A, 300V	8A, 150V	8A, 300V

Wire preparation and materials

Characteristic	250/2.5 and 250/2.54	250A/3.5 and 250B/3.5
Solid conductor	0.2–0.5mm²	0.2–1.5mm²
Flexible conductor	0.2–0.5mm²	0.2–1.5mm²
Flexible conductor with ferrule	0.2–0.5mm²	0.2–1.5mm²
Stripping length	8.5–9.5mm; 9mm nominal	9mm
Wire-clamp or fixing screw torque	Not applicable to spring termination; no fixing screw specified
Housing, cover and actuator	PA66, UL94V-0; insulation material group I
Contact pins	Tin-plated phosphor bronze; short-pin part listed	Tin-plated phosphor bronze; short- and long-pin parts listed
Partition	Not separately listed	PA66, UL94V-0
Protection level	IP20
Operating temperature	-40°C to +105°C
Material compliance	RoHS compliance declared

Certificate file numbers and packaging quantities are unspecified.

Ordering fields

Field	Selection
Series and model	TB12-250/2.5, TB18-250/2.54, TB12-250A/3.5 or TB12-250B/3.5
Pole field	02–24P; the 250A outline illustrates a 04P assembly
Colour field Y	1 grey; 2 blue; 3 black; 4 green; 5 orange; 6 red; 7 transparent; 8 yellow; 9 white
Customer suffix	000A for 250/2.5, 250/2.54 and 250B/3.5; 00HA illustrated for 250A/3.5
General screw fields	Not applicable to these spring clamp models

Use the exact model code and pole count. The illustrated housings are grey; the colour legend does not establish availability of every model and colour combination.

2.5mm and 2.54mm PCB dimensions

N is the number of poles. Formula results below are in millimetres. Adjacent poles have alternating solder-pin positions with a transverse row separation of 5.00mm.

Dimension	TB12-250/2.5	TB18-250/2.54
Overall length	[2.5N+1.50]mm	[2.54N+1.50]mm
First-to-last contact span	2.5(N−1)mm	2.54(N−1)mm
Contact pitch	2.50mm	2.54mm
Overall height reference	13.00mm
Body height excluding actuator projection	11.50mm
Solder-pin projection	3.30±0.30mm
Pin width and thickness	0.70mm × 0.40mm
PCB row separation	5.00mm
PCB edge-to-row reference	2.35mm

250 2.5mm body outline and alternating PCB solder-pin layout — TB12-250/2.5 outline and PCB layout.

250 2.54mm body outline and alternating PCB solder-pin layout — TB18-250/2.54 outline and PCB layout.

3.5mm A and B dimensions

Dimension	250A/3.5 and 250B/3.5
Overall length	[3.5N+1.50]mm
First-to-last contact span	3.5(N−1)mm
Contact pitch	3.50mm
Body depth	12.00mm
Overall height	13.40mm
Body height excluding actuator projection	11.40mm
Solder-pin projection	3.50±0.30mm
Pin width and thickness	0.80mm × 0.40mm
Longitudinal end-to-first-pin reference	3.20mm
PCB row separation	5.00mm
PCB edge-to-row reference	4.80mm
PCB hole diameter	Ø1.20mm
Same-row spacing shown for the B layout	7.00mm

The shared outline shows alternative staggered hole positions. Use the individual A or B attachment to identify the required pin pattern; the common pitch does not by itself establish interchangeability.

250A and 250B 3.5mm spring clamp terminal section and staggered PCB footprint — 3.5mm terminal body and alternative staggered PCB hole positions, with 13.40mm overall height and 3.50±0.30mm solder-pin projection.

General drawing tolerances

Individual dimension tolerances take precedence.

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

Geometric characteristic	Applicable dimension	Tolerance
Perpendicularity	0–10mm	0.2mm
Perpendicularity	Over 10mm	0.3mm
Symmetry	All	0.3mm
Straightness	Over 0mm to 100mm	0.2mm
Parallelism	Over 100mm to 150mm	0.3mm
Parallelism	Over 150mm	0.5mm

250 Spring Clamp PCB Terminal Blocks