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Phoenix ContactOfficial Distributor

By Phoenix Contact

SKU
MPN
3031270
Weight
0.024 kg
Series STTB

STTB 2,5 - Double-level spring-cage terminal block

Double-level spring-cage terminal block, nom. voltage: 500 V, nominal current: 22 A, connection method: Spring-cage connection, Rated cross section: 2.5 mm2, cross section: 0.08 mm2 - 4 mm2, mounting type: NS 35/7,5, NS 35/15, color: gray

  • Compact design for maximum space savings
  • Tested for railway applications
Technical Specifications

Product properties

Product familyST
Area of applicationRailway industry
Area of applicationMachine building
Area of applicationPlant engineering
Area of applicationProcess industry
Number of Connections4
Number of rows2
Potentials2

Insulation characteristics

Overvoltage categoryIII
Degree of pollution3

Electrical properties

Rated surge voltage6 kV
Maximum power dissipation for nominal condition0.77 W

Connection data

Number of connections per level2
Nominal cross section2.5 mm²
Stripping length8 mm ... 10 mm
Internal cylindrical gageA3
Connection in acc. with standardIEC 60947-7-1
Conductor cross section rigid0.08 mm² ... 4 mm²
Cross section AWG28 ... 12 (converted acc. to IEC)
Conductor cross section flexible0.08 mm² ... 2.5 mm²
Conductor cross section, flexible [AWG]28 ... 14 (converted acc. to IEC)
Conductor cross-section flexible (ferrule without plastic sleeve)0.14 mm² ... 2.5 mm²
Flexible conductor cross section (ferrule with plastic sleeve)0.14 mm² ... 2.5 mm²
2 conductors with the same cross section, flexible, with TWIN ferrule with plastic sleeve0.5 mm²
Nominal Current22 A
Maximum Load Current26 A (with 4 mm² conductor cross section)
Nominal Voltage500 V
Nominal cross section2.5 mm²

Rated data (ATEX/IECEx)

Identification II 2 GD  Ex eb IIC Gb
Operating temperature range-60 °C ... 110 °C
Ex-certified accessories3030459 D-STTB 2,5
Ex-certified accessories3030747 ATP-STTB 4
Ex-certified accessories1204517 SZF 1-0,6X3,5
Ex-certified accessories3022276 CLIPFIX 35-5
Ex-certified accessories3022218 CLIPFIX 35
List of bridgesPlug-in bridge / FBS 2-5 / 3030161
List of bridgesPlug-in bridge / FBS 3-5 / 3030174
List of bridgesPlug-in bridge / FBS 4-5 / 3030187
List of bridgesPlug-in bridge / FBS 5-5 / 3030190
List of bridgesPlug-in bridge / FBS 10-5 / 3030213
List of bridgesPlug-in bridge / FBS 20-5 / 3030226
Bridge data17 A / 2.5 mm²
Ex temperature increase40 K (21.9 A / 2.5 mm²)
Rated voltage440 V
for bridging with bridge440 V
- At bridging between non-adjacent terminal blocks352 V
- At bridging between non-adjacent terminal blocks via PE terminal block352 V
- At cut-to-length bridging with cover220 V
- At cut-to-length bridging with partition plate220 V
Rated Insulation Voltage400 V
Output(Permanent)

Ex level General

Rated current19.5 A
Maximum Load Current23.5 A

Ex connection data General

Nominal cross section2.5 mm²
Rated cross section AWG14
Connection capacity rigid0.08 mm² ... 4 mm²
Connection capacity AWG28 ... 12
Connection capacity flexible0.08 mm² ... 2.5 mm²
Connection capacity AWG28 ... 14
Output(Permanent)

Ex level Level 1

Contact resistance1.04 mΩ
Output(Permanent)

Ex level Level 2

Contact resistance0.83 mΩ

Dimensions

Width5.2 mm
End cover width2.2 mm
Height67.5 mm
Depth on NS 35/7,547.5 mm
Depth on NS 35/1555 mm

Material specifications

Colorgray
Flammability rating according to UL 94V0
Insulating material groupI
Insulating materialPA
Static insulating material application in cold-60 °C
Relative insulation material temperature index (Elec., UL 746 B)130 °C
Fire protection for rail vehicles (DIN EN 45545-2) R22HL 1 - HL 3
Fire protection for rail vehicles (DIN EN 45545-2) R23HL 1 - HL 3
Fire protection for rail vehicles (DIN EN 45545-2) R24HL 1 - HL 3
Fire protection for rail vehicles (DIN EN 45545-2) R26HL 1 - HL 3
Surface flammability NFPA 130 (ASTM E 162)passed
Specific optical density of smoke NFPA 130 (ASTM E 662)passed
Smoke gas toxicity NFPA 130 (SMP 800C)passed

Surge voltage test

Test voltage setpoint7.3 kV
ResultTest passed

Temperature-rise test

Requirement temperature-rise testIncrease in temperature ≤ 45 K
ResultTest passed
Short-time withstand current 2.5 mm²0.3 kA
Short-time withstand current 2.5 mm²0.3 kA
ResultTest passed

Power-frequency withstand voltage

Test voltage setpoint1.89 kV
ResultTest passed

Mechanical data

Open side panelYes

Mechanical strength

ResultTest passed

Attachment on the carrier

DIN rail/fixing supportNS 32/NS 35
Test force setpoint1 N
ResultTest passed

Test for conductor damage and slackening

Rotation speed10 (+/- 2) rpm
Revolutions135
Conductor cross section/weight0.08 mm² / 0.1 kg
Conductor cross section/weight2.5 mm² / 0.7 kg
Conductor cross section/weight4 mm² / 0.9 kg
ResultTest passed

Aging

Temperature cycles192
ResultTest passed

Needle-flame test

Time of exposure30 s
ResultTest passed

Oscillation/broadband noise

SpecificationDIN EN 50155 (VDE 0115-200):2018-05
SpectrumService life test category 2, bogie-mounted
Frequencyf1 = 5 Hz to f2 = 250 Hz
ASD level6.12 (m/s²)²/Hz
Acceleration3.12g
Test duration per axis5 h
Test directionsX-, Y- and Z-axis
ResultTest passed

Shocks

SpecificationDIN EN 50155 (VDE 0115-200):2008-03
Pulse shapeHalf-sine
Acceleration30g
Shock duration18 ms
Number of shocks per direction3
Test directionsX-, Y- and Z-axis (pos. and neg.)
ResultTest passed

Ambient conditions

Ambient Temperature (Operation)-60 °C ... 110 °C (Operating temperature range incl. self-heating; for max. short-term operating temperature, see RTI Elec.)
Ambient temperature (storage/transport)-25 °C ... 60 °C (for a short time, not exceeding 24 h, -60 °C to +70 °C)
Ambient temperature (assembly)-5 °C ... 70 °C
Ambient temperature (actuation)-5 °C ... 70 °C
Permissible humidity (operation)20 % ... 90 %
Permissible humidity (storage/transport)30 % ... 70 %

Standards and Regulations

Connection in acc. with standardIEC 60947-7-1

Mounting

Mounting TypeNS 35/7,5
Mounting TypeNS 35/15
Accessories

Why Proax for Phoenix Contact STTB 2,5?

Proax is an authorized distributor of Phoenix Contact STTB 2,5 and one of Phoenix Contact's largest distributors in North America. Our highly skilled in-house technical team is ready to assist with any technical needs.

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Additional Information

Alternate NamesSTTB25
Pack Size50
Recommended
Sold in quantities of 50

Available for order