SL1021A/B, SL1024A/B and PMT8 Series

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1 Description Agency Approvals AGENCY Features RoHS compliant Low insertion loss Excellent response to fast rising transients Ultra low capacitance Applications SL21 / SL24: Broadband equipment ADSL equipment XDSL equipment Satellite and CATV equipment Splitters General telecom equipment AGENCY FILE NUMBER E Electrode GDT Graphical Symbol a e b a = TIP b = RING e = GROUND (center electrode) KA (A suffix devices) / KA (B suffix devices) surge capability tested with 8/μs pulse as defined by IEC Available with thermal failsafe option (add F suffix to part number) PMT8: Telecom network interfaces Telephone line cards Repeaters Modems Line test equipment GDT circuit protection devices dissipate electrical surge energy safely within a contained plasma gas. Commonly used to help protect sensitive telecom and networking equipment and lines, GDTs protect from damage that may result from lightning strikes and equipment switching operations. The Littelfuse GDT series described in this document are available in a variety of leaded and surface mount forms and offered with and without optional failsafe clip. Please refer to the electrical specifications, dimension and packaging options section of this document for additional information. SL21A/B and SL24A/B Series: SL21A/B and SL24A/B series GDTs are designed to offer high levels of performance on fast rising transients in the range of 0V/μS to 1KV/μS, which are those most likely created by induced lightning disturbances. These devices feature ultra low capacitance (typically 1.5pF or less) and are extremely robust with SL2xA devices able to divert a,000 Amp pulse without destruction, and SL2xB suffix devices able to divert a,000 Amp pulse without destruction. These series offer optimized internal geometry which provide low insertion loss at high frequencies, ideal for the protection of broadband and other high speed transmission equipment. PMT8 Series: PMT8 GDT's are telecom grade devices designed to meet the recommendations in CCITT-K12 and Bellcore GR-1361-CORE. The three electrode configuration is used in applications where simultaneous crowbar action of two signal lines is required. Product Characteristics Materials Product Marking Glow to arc transition current Glow Storage and Operation Temperature Transverse (Delay Time) Arc Holdover Dull Tin Plate 17.5 ± 12.5 Microns. with ceramic insulator LF mark, voltage& date code: SL2xA - Red/White text SL2xB & PMT8 - Blue/White text ~ 1Amp ~-0 Volts -40 to +90 C < 0.2μSec (Tested to ITU-T Rec. K.12) ~ to 35 Volts <0mS (Tested to ITU-T Rec. K.12) 19

2 Electrical Characteristics Device Specifications (at 25 C) Life Ratings Part Number* DC 0V/Sec. DC 0 V/ μsec. DC 1kV/ μsec. Capacitance (@1Mhz) Insulation Resistance MIN TYP MAX MIN AC Current 50Hz 1Sec.x 1 Current 8/μSec x 1 Max Single 8/μSec 1 Max Single /350μSec 1 Life /00 μsecx300 1 SL21A090 SL24A090 SL21B090 SL24B090 PMT kA 2 5kA 3 SL21A145 SL24A145 SL21B145 SL24B SL21A0 SL24A0 SL21B0 SL24B SL21A SL21A230 SL24A230 SL21B230 SL24B230 PMT SL21A250 SL24A250 SL21B250 SL24B250 PMT SL21A2 SL24A2 SL21B2 SL24B2 SL21A300 SL24A300 SL21B300 SL24B <1.5pF Amps ka 2 ka 3 ka 2 25kA 3 2.5kA 2 5kA 3 0Amps SL21A350 SL24A350 SL21B350 SL24B350 PMT SL21A400 SL24A400 SL21B400 SL24B400 PMT SL21A4 SL24A4 SL21B4 SL24B SL21A450 SL24A450 SL21B450 SL24B SL21A500 SL24A500 SL21B500 SL24B SL21A0 SL24A NOTES: *Max capacitance is 1.5 pf, measured at 1 MHz. 1. Total current through centre electrode, tested in accordance with ITU-T Rec K SL A series 3. SL B series & PMT 8 series

3 Temperature Gas Discharge Tube (GDT) Products Time vs. Current for Failsafe vs. Time Characteristic SL2xA with Failsafe SL2xB or PMT8 500 Volt Higher Melting Point Solder SL2xB or PMT8 350 Volt Higher Melting Point Solder SL2xB or PMT8 90 Volt Higher Melting Point Solder (V) Max dynamic breakover voltage Hold-over voltage On-State voltage Time (ns) Soldering Parameters - Reflow Soldering (Surface Mount Devices) Reflow Condition Pb Free assembly - Temperature Min (T s(min) ) 0 C Pre Heat - Temperature Max (T s(max) ) 0 C - Time (Min to Max) (t s ) 180 secs Average ramp up rate (Liquidus Temp (T L ) to peak 3 C/second max T S(max) to T L - Ramp-up Rate 5 C/second max Reflow - Temperature (T L ) (Liquidus) 217 C - Temperature (t L ) 0 seconds Peak Temperature (T P ) 2 +0/-5 C Time within 5 C of actual peak Temperature (t p ) 30 seconds Ramp-down Rate 6 C/second max Time 25 C to peak Temperature (T P ) 8 minutes Max. Do not exceed 2 C T P T L T S(max) T S(min) 25 Preheat t S time to peak temperature (t 25ºC to peak) Ramp-up Soldering Parameters - Hand Soldering Solder Iron Temperature: 350 C +/- 5 C Heating Time: 5 seconds max. t P t L Critical Zone TL to TP Ramp-down Time Soldering Parameters - Wave Soldering (Thru-Hole Devices) 300 Recommended Process Parameters: Temperature ( C) - Measured on bottom side of board Time (Seconds) Preheat Time Dwell Time Cooling Time Wave Parameter Preheat: (Depends on Flux Activation Temperature) Temperature : Temperature Maximum: Preheat Time: Solder Pot Temperature: Solder Dwell Time: Lead-Free Recommendation (Typical Industry Recommendation) 0 C 0 C -180 seconds 280 C Maximum 2-5 seconds Note: Arrestors with a Failsafe mechanism should be individually examined after soldering 21

4 Device Dimensions NOTE: Failsafe option dimensions shown in green. Shaped Radial Leaded Devices: Surface Mount Devices: Type 04 / R 12.4 ± 1 [0.488 ± 0.039] 8.1. Type 01 / C [0.173] 4.4± 0.3 [0.173± 0.12] 4.4± 0.3 [0.173± 0.12] Type 7.7 ± 0.3 [0.303 ± 0.019].0 ± 0.3 [0.394 ± 0.019] Ø7.0 ± 0.1 [0.275 ± 0.004] Type 05 / P 12.4 ± 1 [0.488 ± 0.039] /-0.0 [ /-0.00] PROFILE VIEW SIDE VIEW TOP VIEW /-0.1 [ /-0.004] 1.2 ± 0.0 [0.047 ± 0.000] 2.2 ± 0.0 [0.087 ± 0.000] 1.2 ± 0.0 [0.047 ± 0.000] 6.0 ± 0.0 [0.236 ± 0.000] 8.5 ± 0.0 [0.335 ± 0.000] 4.4 [0.173].75 ± 0.0 [0.423 ± 0.000] Overall Product Space DO NOT ENCROACH 5.5± 0.3 [0.216± 0.12] 5.5± 0.3 [0.216± 0.12] SOLDERING PAD LAYOUT Straight "T" Leaded Devices: Straight Radial Leaded Devices: Type 14 / X 50 ± 3 [1.968 ± ] 8.1 DIA. MAX. Type 06 / Y 14.7 [0.579] 8.1 DIA. MAX. 22 [0.866] 23.8 [0.937] 6.35 ± 0.5 [0.25 ± 0.25] 6.35 ± 0.5 [0.25 ± 0.25] 22

5 Part Numbering System and Ordering Information Packaging SL2x x xxx x x Series SL21 SL24 Capability A = ka B = ka Breakdown 090 = 90V 300 = 300V 145 = 145V 350 = 350V 0 = 0V 400 = 400V 0 = 0V 4 = 4V 230 = 230V 450 = 450V 250 = 250V 500 = 500V 2 = 2V 0 = 0V Configuration Code (See Device Dimensions section) C Y R S P X Option Code Blank = No failsafe F or G = With Failsafe Series PMT8 Breakdown 090 = 90V 230 = 230V 250 = 250V 350 = 350V 400 = 400V PMT8 xxx x x Configuration Code (See Device Dimensions section) Option Code Blank = No Failsafe F = With Failsafe Device Type Description Quantity Type 01 / C 0pcs/tray x 5 trays per carton 500 Type 04 / R 0pcs/tray x 5 trays per carton 500 Type 05 / P 0pcs/tray x 5 trays per carton 500 Type 06 / Y 0pcs/tray x 5 trays per carton 500 Type 14 / X 50pcs/tray x 5 trays per carton 250 Type 500pcs/reel* x reels per carton 5000 * For tape and reel specifications, please contact factory. 23