# DIN Rail Mount Terminal Block, Knife Disconnect, 4 Ways, 28 AWG, 10 AWG, 4 mm², Clamp, 28 A
**URL**: https://novapart.co/products/3035522/din-rail-mount-terminal-block-knife-disconnect-4
**SKU**: 3035522
**Manufacturer**: PHOENIX CONTACT
**Category**: Connectors || Terminal Blocks & Accessories || DIN Rail Terminal Blocks
**Price**: €6.8600
**Stock**: 10+
## Specifications
| Parameter | Value |
|---|---|
| Svhc | No SVHC (25-Jun-2025) |
| No. Of Levels | 2 |
| Product Range | CLIPLINE STTBS |
| Rated Current | 28A |
| Rated Voltage | 500V |
| No. Of Positions | 4Ways |
| Wire Size Awg Max | 10AWG |
| Wire Size Awg Min | 28AWG |
| Conductor Area Csa | 4mm² |
| Wire Connection Method | Clamp |
## Datasheet
📄 [Download PDF](https://novapart.co/datasheet/farnell:3241122/)
https://www.phoenixcontact.com/us/products/3035522
## Knife disconnect terminal block - STTBS 4-MT BU - 3035522
Please be informed that the data shown in this PDF Document is generated from our Online Catalog. Please find the complete data in the user's documentation. Our General Terms of Use for Downloads are valid
(http://phoenixcontact.com/download)
Knife disconnect terminal block, Connection type: Spring-cage connection, Cross section: 0.08 mm² - 6 mm², AWG: 28 - 10, Width: 6.2 mm, Color: blue, Mounting type: NS 35/7,5, NS 35/15
The illustration shows the version in gray
## Why buy this product
Disconnect knife for one level
## Key Commercial Data
|Packing unit|1 STK|1 STK|1 STK|1 STK||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|Minimum order quantity|50 STK|50 STK||||||||||
|||||||||||||
|GTIN||||||||||||
|||||||||||||
|GTIN|4046356340830|||||||||||
|Custom tariff number|85369010|||||||||||
|Country of origin|China|||||||||||
## Technical data
## General
|Number of levels|2|
|---|---|
|Number of connections|4|
|Nominal cross section|4 mm²|
|Color|blue|
|Insulating material|PA|
|Flammability rating according to UL 94|V0|
|Rated surge voltage|6 kV|
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https://www.phoenixcontact.com/us/products/3035522
## Knife disconnect terminal block - STTBS 4-MT BU - 3035522
## Technical data
## General
|General||
|---|---|
|Overvoltage category|III|
|Insulating material group|I|
|Connection in acc. with standard|IEC 60947-7-1|
|Nominal current IN|28 A|
|Maximum load current|34 A (with 4 mm² conductor cross section)|
|Nominal voltage UN|500 V|
|Open side panel|Yes|
|Relative insulation material temperature index (Elec., UL 746 B)|130 °C|
|Temperature index of insulation material (DIN EN 60216-1 (VDE 0304-21))|130 °C|
|Static insulating material application in cold|-60 °C|
|Behavior in fire for rail vehicles (DIN 5510-2)|Test passed|
|Flame test method (DIN EN 60695-11-10)|V0|
|Oxygen index (DIN EN ISO 4589-2)|>32 %|
|NF F16-101, NF F10-102 Class I|2|
|NF F16-101, NF F10-102 Class F|2|
|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|
|Calorimetric heat release NFPA 130 (ASTM E 1354)|28 MJ/kg|
|Fire protection for rail vehicles (DIN EN 45545-2) R22|HL 1 - HL 3|
|Fire protection for rail vehicles (DIN EN 45545-2) R23|HL 1 - HL 3|
|Fire protection for rail vehicles (DIN EN 45545-2) R24
~~=~~|HL 1 - HL 3
~~=~~|
|Fire protection for rail vehicles (DIN EN 45545-2) R26|HL 1 - HL 3|
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https://www.phoenixcontact.com/us/products/3035522
## Knife disconnect terminal block - STTBS 4-MT BU - 3035522
## Technical data
## Connection data
|Connection data||
|---|---|
|Conductor cross section flexible, with ferrule without plastic sleeve max.|4 mm²|
|Conductor cross section flexible, with ferrule with plastic sleeve min.|0.14 mm²|
|Conductor cross section flexible, with ferrule with plastic sleeve max.|4 mm²|
|2 conductors with same cross section, stranded, TWIN ferrules with plastic
sleeve, min.|0.5 mm²|
|2 conductors with same cross section, stranded, TWIN ferrules with plastic
sleeve, max.|1 mm²|
|Connection method|Spring-cage connection|
|Stripping length|8 mm ... 10 mm|
## Standards and Regulations
|Connection in acc. with standard|CUL|
|---|---|
||IEC 60947-7-1|
||IEC 60947-7-1|
|Flammability rating according to UL 94|V0|
Environmental Product Compliance
China RoHS Environmentally friendly use period: unlimited = EFUP-e No hazardous substances above threshold values ~~ee~~
Drawings
## Circuit diagram
## Classifications
## eCl@ss
|eCl@ss 4.0|eCl@ss 4.0|27141121|
|---|---|---|
|eCl@ss 4.1|eCl@ss 4.1|27141121|
|eCl@ss 5.0|eCl@ss 5.0|27141120|
|eCl@ss 5.1|eCl@ss 5.1|27141120|
|eCl@ss 6.0|eCl@ss 6.0|27141120|
|eCl@ss 7.0|eCl@ss 7.0|27141120|
|eCl@ss 8.0|eCl@ss 8.0|27141126|
|eCl@ss 9.0|eCl@ss 9.0|27141126|
|ETIM|||
ETIM 2.0 EC000897 ~~a~~
02/09/2017 Page 3 / 17
https://www.phoenixcontact.com/us/products/3035522
## Knife disconnect terminal block - STTBS 4-MT BU - 3035522
## Classifications
ETIM ETIM 3.0 EC000897 ETIM 4.0 EC000902 ETIM 5.0 EC000902 ETIM 6.0 EC000902 ~~————~~ UNSPSC UNSPSC 6.01 30211811 UNSPSC 7.0901 39121410 UNSPSC 11 39121410 UNSPSC 12.01 39121410 UNSPSC 13.2 39121410 ~~SSS~~ Approvals Approvals
## Approvals
UL Recognized / cUL Recognized / EAC / EAC / cULus Recognized Ex Approvals Approval details
> UL Recognized http://database.ul.com/cgi-bin/XYV/template/LISEXT/1FRAME/index.htm FILE E 60425 B C D mm²/AWG/kcmil 28-10 28-10 28-10 Nominal current IN 16 A 16 A 5 A Nominal voltage UN 300 V 300 V 600 V ~~—————~~
> cUL Recognized http://database.ul.com/cgi-bin/XYV/template/LISEXT/1FRAME/index.htm FILE E 60425 B C D mm²/AWG/kcmil 28-10 28-10 28-10 Nominal current IN 16 A 16 A 5 A ~~po~~ 02/09/2017 Page 4 / 17
https://www.phoenixcontact.com/us/products/3035522
## Knife disconnect terminal block - STTBS 4-MT BU - 3035522
**==> picture [543 x 240] intentionally omitted <==**
**----- Start of picture text -----**
Approvals
B C D
Nominal voltage UN 300 V 300 V 600 V
——
EAC EAC-Zulassung
OO
EAC 7500651.22.01.00246
—
cULus Recognized http://database.ul.com/cgi-bin/XYV/template/LISEXT/1FRAME/index.htm
OO
Accessories
**----- End of picture text -----**
Accessories
DIN rail
DIN rail perforated - NS 35/ 7,5 PERF 2000MM - 0801733
DIN rail, material: steel galvanized and passivated with a thick layer, perforated, height 7.5 mm, width 35 mm, length: 2000 mm
DIN rail, unperforated - NS 35/ 7,5 UNPERF 2000MM - 0801681
DIN rail, material: Steel, unperforated, height 7.5 mm, width 35 mm, length: 2 m
DIN rail perforated - NS 35/ 7,5 WH PERF 2000MM - 1204119
DIN rail 35 mm (NS 35)
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https://www.phoenixcontact.com/us/products/3035522
## Knife disconnect terminal block - STTBS 4-MT BU - 3035522
## Accessories
DIN rail - NS 35/ 7,5 WH UNPERF 2000MM - 1204122
DIN rail 35 mm (NS 35)
DIN rail, unperforated - NS 35/ 7,5 AL UNPERF 2000MM - 0801704
DIN rail, unperforated, Width: 35 mm, Height: 7.5 mm, Length: 2000 mm, Color: silver
DIN rail perforated - NS 35/ 7,5 ZN PERF 2000MM - 1206421
DIN rail, material: Galvanized, perforated, height 7.5 mm, width 35 mm, length: 2 m
DIN rail, unperforated - NS 35/ 7,5 ZN UNPERF 2000MM - 1206434
DIN rail, material: Galvanized, unperforated, height 7.5 mm, width 35 mm, length: 2 m
DIN rail, unperforated - NS 35/ 7,5 CU UNPERF 2000MM - 0801762
DIN rail, material: Copper, unperforated, height 7.5 mm, width 35 mm, length: 2 m
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https://www.phoenixcontact.com/us/products/3035522
## Knife disconnect terminal block - STTBS 4-MT BU - 3035522
## Accessories
End cap - NS 35/ 7,5 CAP - 1206560
DIN rail end piece, for DIN rail NS 35/7.5
DIN rail perforated - NS 35/15 PERF 2000MM - 1201730
DIN rail, material: steel galvanized and passivated with a thick layer, perforated, height 15 mm, width 35 mm, length: 2000 mm
## DIN rail, unperforated - NS 35/15 UNPERF 2000MM - 1201714
DIN rail, material: Steel, unperforated, height 15 mm, width 35 mm, length: 2 m
DIN rail perforated - NS 35/15 WH PERF 2000MM - 0806602
DIN rail 35 mm (NS 35)
DIN rail - NS 35/15 WH UNPERF 2000MM - 1204135
DIN rail 35 mm (NS 35)
02/09/2017 Page 7 / 17
https://www.phoenixcontact.com/us/products/3035522
## Knife disconnect terminal block - STTBS 4-MT BU - 3035522
## Accessories
DIN rail, unperforated - NS 35/15 AL UNPERF 2000MM - 1201756
DIN rail, deep drawn, high profile, unperforated, 1.5 mm thick, material: aluminum, height 15 mm, width 35 mm, length 2000 mm
## DIN rail perforated - NS 35/15 ZN PERF 2000MM - 1206599
DIN rail, material: Galvanized, perforated, height 15 mm, width 35 mm, length: 2 m
DIN rail, unperforated - NS 35/15 ZN UNPERF 2000MM - 1206586
DIN rail, material: Galvanized, unperforated, height 15 mm, width 35 mm, length: 2 m
DIN rail, unperforated - NS 35/15 CU UNPERF 2000MM - 1201895
DIN rail, material: Copper, unperforated, 1.5 mm thick, height 15 mm, width 35 mm, length: 2 m
End cap - NS 35/15 CAP - 1206573
DIN rail end piece, for DIN rail NS 35/15
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https://www.phoenixcontact.com/us/products/3035522
## Knife disconnect terminal block - STTBS 4-MT BU - 3035522
## Accessories
DIN rail, unperforated - NS 35/15-2,3 UNPERF 2000MM - 1201798
DIN rail, unperforated, Width: 35 mm, Height: 15 mm, Length: 2000 mm, Color: silver
## Documentation
Mounting material - ST-IL - 3039900
Operating decal for the ST terminal block
## End block
End clamp - CLIPFIX 35 - 3022218
Quick mounting end clamp for NS 35/7,5 DIN rail or NS 35/15 DIN rail, with marking option, width: 9.5 mm, color: gray ~~ee~~ End clamp - CLIPFIX 35-5 - 3022276 Quick mounting end clamp for NS 35/7,5 DIN rail or NS 35/15 DIN rail, with marking option, with parking option for FBS...5, FBS...6, KSS 5, KSS 6, width: 5.15 mm, color: gray
End clamp - E/NS 35 N - 0800886
End clamp, width: 9.5 mm, color: gray
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https://www.phoenixcontact.com/us/products/3035522
## Knife disconnect terminal block - STTBS 4-MT BU - 3035522
## Accessories
End clamp - E/UK - 1201442
End clamp, Width: 9.5 mm, Height: 35.3 mm, Length: 50.5 mm, Color: gray
End clamp - E/UK 1 - 1201413
End clamps, for supporting the ends of double-level and three-level terminal blocks, width: 10 mm, color: gray
## End cover
End cover - D-STTBS 4-MT - 3035548
End cover, Length: 92.4 mm, Width: 2.2 mm, Height: 47 mm, Color: gray
~~x.~~ Insulating sleeve
Insulating sleeve - ISH 4/0,5 - 3002885
Insulating sleeve, Color: gray
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https://www.phoenixcontact.com/us/products/3035522
## Knife disconnect terminal block - STTBS 4-MT BU - 3035522
## Accessories
Insulating sleeve - ISH 4/1,0 - 3002898
Insulating sleeve, Color: black
## Jumper
Plug-in bridge - FBS 2-6 - 3030336
Plug-in bridge, Pitch: 6.2 mm, Length: 23 mm, Width: 10.7 mm, Number of positions: 2, Color: red
Plug-in bridge - FBS 3-6 - 3030242
Plug-in bridge, Pitch: 6.2 mm, Length: 23 mm, Width: 16.9 mm, Number of positions: 3, Color: red
Plug-in bridge - FBS 4-6 - 3030255
Plug-in bridge, Pitch: 6.2 mm, Length: 23 mm, Width: 23.1 mm, Number of positions: 4, Color: red
Plug-in bridge - FBS 5-6 - 3030349
Plug-in bridge, Pitch: 6.2 mm, Length: 23 mm, Width: 29.3 mm, Number of positions: 5, Color: red
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https://www.phoenixcontact.com/us/products/3035522
## Knife disconnect terminal block - STTBS 4-MT BU - 3035522
## Accessories
Plug-in bridge - FBS 10-6 - 3030271
Plug-in bridge, Pitch: 6.2 mm, Length: 23 mm, Width: 60.3 mm, Number of positions: 10, Color: red
Plug-in bridge - FBS 20-6 - 3030365
Plug-in bridge, Pitch: 6.2 mm, Length: 23 mm, Width: 122.3 mm, Number of positions: 20, Color: red
Plug-in bridge - FBS 50-6 - 3032224
Plug-in bridge, Pitch: 6.2 mm, Number of positions: 50, Color: red
Plug-in bridge - FBSR 2-6 - 3033715
Plug-in bridge, Pitch: 6.2 mm, Number of positions: 2, Color: red
Plug-in bridge - FBSR 3-6 - 3001594
Plug-in bridge, Pitch: 6.2 mm, Number of positions: 3, Color: red
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https://www.phoenixcontact.com/us/products/3035522
## Knife disconnect terminal block - STTBS 4-MT BU - 3035522
## Accessories
Plug-in bridge - FBSR 4-6 - 3001595
Plug-in bridge, Pitch: 6.2 mm, Number of positions: 4, Color: red
Plug-in bridge - FBSR 5-6 - 3001596
Plug-in bridge, Pitch: 6.2 mm, Number of positions: 5, Color: red
Plug-in bridge - FBSR 10-6 - 3033716
Plug-in bridge, Pitch: 6.2 mm, Number of positions: 10, Color: red
## Labeled terminal marker
Warning cover - WST 4 - 3030954
**==> picture [63 x 96] intentionally omitted <==**
**----- Start of picture text -----**
Partition plate
,
**----- End of picture text -----**
Warning cover, Strip, yellow, labeled, Mounting type: Plug in, Lettering field: 4.5 x 5.55 mm
Partition plate - ATP-STTB 4 - 3030747
Partition plate, Length: 88.7 mm, Width: 2 mm, Height: 53 mm, Color: gray
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https://www.phoenixcontact.com/us/products/3035522
## Knife disconnect terminal block - STTBS 4-MT BU - 3035522
## Accessories
## Screwdriver tools
Screwdriver - SZF 1-0,6X3,5 - 1204517 Actuation tool, for ST terminal blocks, also suitable for use as a bladed screwdriver, size: 0.6 x 3.5 x 100 mm, 2- component grip, with non-slip grip . Screwdriver - ST-BW - 1207608 Actuation tool, for all 2.5 mm² - 4.0 mm² spring-cages ~~bo~~ Short-circuit connector Short-circuit connector - FBSRH 2-6 - 3033812
Short-circuit connector, Pitch: 6.2 mm, Number of positions: 2, Color: red
Switching lock Switching lock - S-MT - 3247954
Switching lock, Length: 10.5 mm, Width: 3.5 mm, Height: 23.1 mm, Color: white
Test plug terminal block
02/09/2017 Page 14 / 17
https://www.phoenixcontact.com/us/products/3035522
## Knife disconnect terminal block - STTBS 4-MT BU - 3035522
## Accessories
Test plugs - PS-6 - 3030996
Test plugs, Color: red
Test plugs - PS-6/2,3MM RD - 3038736
Test plugs, Color: red
## Test socket
Test adapter - PAI-4-FIX-5/6 BU - 3035975
4 mm test adapter, for terminal blocks with 5.2 mm and 6.2 mm pitch
Test adapter - PAI-4-FIX-5/6 OG - 3035974
4 mm test adapter, for terminal blocks with 5.2 mm and 6.2 mm pitch
Test adapter - PAI-4-FIX-5/6 YE - 3035977
4 mm test adapter, for terminal blocks with 5.2 mm and 6.2 mm pitch
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https://www.phoenixcontact.com/us/products/3035522
## Knife disconnect terminal block - STTBS 4-MT BU - 3035522
## Accessories
Test adapter - PAI-4-FIX-5/6 RD - 3035976
4 mm test adapter, for terminal blocks with 5.2 mm and 6.2 mm pitch
Test adapter - PAI-4-FIX-5/6 GN - 3035978
4 mm test adapter, for terminal blocks with 5.2 mm and 6.2 mm pitch 4 mm test adapter, for terminal blocks with 5.2 mm and 6.2 mm pitch
Test adapter - PAI-4-FIX-5/6 BK - 3035980
Test adapter - PAI-4-FIX-5/6 GY - 3035982
4 mm test adapter, for terminal blocks with 5.2 mm and 6.2 mm pitch ~~Ao~~ Test adapter - PAI-4-FIX-5/6 VT - 3035979 4 mm test adapter, for terminal blocks with 5.2 mm and 6.2 mm pitch
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https://www.phoenixcontact.com/us/products/3035522
## Knife disconnect terminal block - STTBS 4-MT BU - 3035522
## Accessories
Test adapter - PAI-4-FIX-5/6 BN - 3035981
4 mm test adapter, for terminal blocks with 5.2 mm and 6.2 mm pitch
Test adapter - PAI-4-FIX-5/6 WH - 3035983
4 mm test adapter, for terminal blocks with 5.2 mm and 6.2 mm pitch
Phoenix Contact 2017 © - all rights reserved http://www.phoenixcontact.com
02/09/2017 Page 17 / 17
## Links
- [View this product on Novapart](https://novapart.co/products/3035522/din-rail-mount-terminal-block-knife-disconnect-4)
- [Request a quote for this part](https://novapart.co/quote/)
- [Supplier page](https://es.farnell.com/phoenix-contact/sttbs-4-mt-bu/dinrail-terminal-block-4way-10awg/dp/3241122)
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