SG75

Gas Discharge Tube (GDT), 2-Electrode, SG Series, 75 V, SMD, 2 kA, 650 V

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Manufacturer: LITTELFUSE
Product type: Gas Discharge Tubes - GDT
Product Range:SG Series; DC Breakover Voltage:75V; GDT Case Style:SMD; Impulse Discharge Current:2kA; Impulse Sparkover Voltage:650V
SVHC: No SVHC (17-Dec-2014)
Product Range: SG Series
GDT Case Style: SMD
DC Breakover Voltage: 75V
Impulse Discharge Current: 2kA
Impulse Sparkover Voltage: 650V

Delivery and price
Units per pack	2000
Price	0.641 €
Current stock	1000+
Lead time	30 days

Datasheet

**Gas Discharge Tubes** SG Series 

**RoHS** ~~| _|@) SAM~~ 

## SG Series 

## ~~**Description** [oT~~ 

Littelfuse SG series GDT offers high surge ratings in a miniature package. It’s designed for surface mounting on PCB with small size 4.5x3.2x2.7mm. Low insertion loss is perfectly suited to broadband equipment applications. The capacitance does not vary with voltage, and will not cause operational problems with ADSL2+, where capacitance variation across Tip and Ring is undesirable. These devices are extremely robust and are able to divert a 1000A pulse without destruction. 

## ~~**Features** [Po~~ 

## ~~**Agency Approvals** [Lo~~ 

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Agency Agency File Number<br>Wi E128662<br>2 Electrode GDT Graphical Symbol<br>Lo<br>**----- End of picture text -----**<br>


- RoHS compliant and • Ultra small devices Lead-free offered in a variety of 

- • GHz working frequency mounting lead forms 

- Excellent stability on • Non-Radioactive multiple pulse duty cycle • Low capacitance (<1pF) 

- Excellent response to • Voltage Ranges 75V to fast rising transients. 600V 

- Ultra Low Insertion Loss 

   - UL Recongized 

- 1-2KA surge capability • Conforms to ITU-T K12, tested with 8/20μS IEC 61000-4-5 pulse as defined by IEC • Square Outline 61000-4-5 

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Additional Information<br>eee<br>Datasheet Resources Samples<br>**----- End of picture text -----**<br>


- ~~**Applications**~~ 

- SS ~~eee~~ • Communication • Broadband equipment equipment • ADSL equipment, 

      - ADSL equipment, including ADSL2+ 

   - CATV equipment 

   - XDSL equipment 

- Test equipment 

   - Satellite and CATV equipment 

- Data lines 

- Power supplies 

   - General telecom equipment 

- Telecom SLIC protection 

© 2020 Littelfuse, Inc. Specifications are subject to change without notice. Revised: BA.08/26/20 

**Gas Discharge Tubes** SG Series 

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## ~~**Electrical Characteristics**~~ 

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Device Specifications (at 25°C) Life Ratings<br>Nominal<br>NumberPart  DC Breakdown(@100V/s)in Volts (@100V/µs)Breakdown Impulse in Volts  Breakdown  (@1 Kv/Impulse In Volts  Resistance Insulation  (@1MHz)Capaci-tance  Voltage (@1A)Arc  Glow to Arc Transition Current VoltageGlow  Nominal AC Discharge Current (x10  Current (x10 Discharge Nominal Impulse  Discharge Impulse Current<br>(10/1000µs<br>µsec) @50Hz) @8/20µs)<br>Min. Typ. Max. Max. Min. Max. 100 cycles)<br>SG75 52 75 98 500 650<br>>1GΩ<br>SG90 63 90 117 500 600 2 A 2kA<br>(at 50VDC)<br>SG150 105 150 195 500 600<br>~10 V ~1.0 A ~60 V<br>>1GΩ<br>SG200 [+] 140 200 260 550 700 (at 100VDC) <1 pf 2.5 A<br>SG230 172 230 288 650 800<br>2 A<br>SG300 225 300 375 700 850 ~12 V ~0.5 A ~90 V<br>SG300Q 210 300 390 580 650 ~20 V ~0.8 A ~140 V NA*<br>10 A<br>SG350 263 350 437 750 900 >1GΩ       (at  ~90 V 2 A<br>SG350Q 263 350 437 600 700 50VDC) <0.8 pf ~12 V ~0.5 A ~140 V NA*<br>1kA<br>SG400 300 400 500 800 950 ~90 V 2 A<br>SG420 315 420 525 800 1000 ~10 V ~60 V 2 A<br>SG420Q 315 420 525 650 750 <1 pf ~20 V <1.0 A NA*<br>SG450Q 370 450 500 680 750 ~20 V 1 A<br>>1GΩ ~140 V<br>SG500Q 400 500 600 950 1050 (at 100VDC) <0.5 pf ~16 V ~0.1 A 2 A<br>SG600Q 450 600 750 1100 1200 <1 pf ~20 V <0.5 A<br>*  Specification is not applicable for quick response (SGxxx Q ) version of product<br>+  Not UL Recognized<br>Product Characteristics Voltage vs. Time Characteristic<br>Device Tin Plated 17.5±12.5 Microns<br>Materials Construction Ceramic Insulator. Max dynamic breakover<br>voltage<br>Storage and Operational  -40 to +90 °C<br>Temperature<br>Typical Insertion Loss<br>@ 1.0 GHz = 0.01 dB<br>Hold-over voltage<br>@ 1.4GHz = 0.1 dB<br>@ 1.8 GHz = 0.53 dB<br>On-State voltage<br>@ 2.1 GHz = 0.81 dB<br>@ 2.45 GHz= 1 dB<br>@ 2.8 GHz = 1.2 dB 0  200  400  600  800  1000  1200<br>Time (ns)<br>@ 3.1 GHz = 1.5 dB<br>@ 3.5 GHz = 2.1 dB<br>(V)<br>Voltage<br>**----- End of picture text -----**<br>


© 2020 Littelfuse, Inc. Specifications are subject to change without notice. Revised: BA.08/26/20 

**Gas Discharge Tubes** SG Series 

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## ~~**Soldering Parameters - Refow Soldering (Surface Mount Devices)**~~ 

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Reflow Condition Pb – Free assembly<br>t P<br>- Temperature Min (Ts(min)) 150°C  TP Critical Zone<br>Pre Heat - Temperature Max (Ts(max)) 200°C Ramp-up TL to TP<br>Average ramp up rate (Liquidus Temp (T- Time (Min to Max) (ts) L) to peak 3°C/second max60 – 180 secs TS(max)TL t L<br>TS(max) to TL - Ramp-up Rate 5°C/second max Ramp-down<br>Reflow - Temperature (TL) (Liquidus) 217°C  TS(min) Preheat<br>- Temperature (tL) 60 – 150 seconds t S<br>Peak Temperature (TP) 260 [+0/-5]  °C<br>Ramp-down RateTime within 5°C of actual peak Temperature (tp) 10 – 30 seconds6°C/second max 25 time to peak temperature(t 25ºC to peak) Time<br>Time 25°C to peak Temperature (TP) 8 minutes Max.<br>Do not exceed 260°C<br>Temperature<br>**----- End of picture text -----**<br>


## ~~**Device Dimensions**~~ 

## ~~**Device Marking**~~ 

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Dimensions in Millimeters.<br>2.7 +/- 0.3<br>0.5 +/- 0.1<br>3.2 +/- 0.3<br>4.5 +/- 0.3<br>5.2<br>2.8 4<br>**----- End of picture text -----**<br>


**Recommended Soldering Pad Layout** 

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Type Production<br>Code Year Code<br>(last digit)<br>A3A<br>Production<br>Month Code<br>Type Code Month Code<br>A SG75 A January<br>B SG90 B February<br>C SG150 C March<br>D SG230 D April<br>E SG300 E May<br>F SG300Q F June<br>G SG350 G July<br>H SG350Q H August<br>I SG400 I September<br>J SG420 J October<br>K SG420Q K November<br>L SG450Q L December<br>M SG500Q<br>N SG600Q<br>O SG200<br>**----- End of picture text -----**<br>


© 2020 Littelfuse, Inc. Specifications are subject to change without notice. Revised: BA.08/26/20 

**Gas Discharge Tubes** SG Series 

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Tape and Reel Dimensions  (IEC 60286-3, dimension in mm)<br>**----- End of picture text -----**<br>


## ~~**Part Numbering System and Ordering Information**~~ 

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Tape Specifications<br>IEC 60286-3 SG xxx Q<br>section<br>Dimensions in mm B-B Series<br>Square GDT<br>section<br>A-A Breakdown Voltage<br>0.4 ±0.05 A 2 ±0.1 4 ±0.10 Ø 1.55 ±0.05 Ø 1.6 ±0.1 75 = 75V<br>90 = 90V<br>150 = 150V<br>200 = 200V<br>230 = 230V<br>300 = 300V<br>B B 350 = 350V<br>3 ±0.1 R0.5 typical A 3.65 ±0.1 8 ±0.1 400 = 400V420 = 420V<br>450 = 450V  (Not available without “Q” suffix)<br>SMD-Tape has to withstanda minimum Force of 500 = 500V (Not available without “Q” suffix)<br>F > 20 N / pocket  600 = 600V (Not available without “Q” suffix)<br>minimum vertical load    2 Kg / pocket Device Option Code<br>(minimum checking (Blank) = Standard device<br>quantity:10 pockets)     Q      = Quick Response Version<br>               (300V, 350V, 420V, 450V,<br>               500V, 600V only)<br>Packaging<br>Reel Specifications Part Number and Device Type Quantity and Packaging Description<br>IEC 60286-3<br>Dimensions in mm SGxxx Surface mount 2000pcs/reel in tape and reel<br>1.5 min.<br>12.8 min.<br>R0.75<br>18.4 max.<br>12.4 +2/-0<br>11.9 min.<br>5°<br>5°<br>±0.1<br>1.75<br>±0.1<br>±0.1 +0.3 0 5.5<br>12<br>4.9<br>20.2 min. Ø100 min. Ø330 max.<br>**----- End of picture text -----**<br>


**Disclaimer Notice -** Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each product selected for their own applications. Littelfuse products are not designed for, and may not be used in, all applications. Read complete Disclaimer Notice at: www.littelfuse.com/disclaimer-electronics. 

© 2020 Littelfuse, Inc. Specifications are subject to change without notice. Revised: BA.08/26/20

Updated at June 3, 2026

Founded in 1927 and headquartered in Chicago, Illinois, Littelfuse is a premier global manufacturer of circuit protection, power control, and sensing technologies. Widely recognized for pioneering the first small, fast-acting protective fuse, the company has grown into an industry leader whose highly reliable components are essential to modern industrial, transportation, and consumer electronics applications worldwide. At the core of the Littelfuse portfolio is an expansive and industry-leading range of circuit protection solutions. This encompasses a massive selection of traditional fuses, fuse holders, and resettable PTC thermistor fuses designed to safely interrupt overcurrent conditions. To defend against electrical overstress, Littelfuse also provides advanced transient voltage suppression (TVS) technologies, including thousands of specialized TVS diodes, TVS varistors, and gas discharge tubes (GDTs) that ensure robust defense against voltage spikes and environmental hazards. Beyond its foundational protection components, Littelfuse manufactures a diverse array of discrete semiconductors, sensors, and switching devices. Engineers rely on their high-performance thyristors, including TRIACs and SCRs, alongside power-efficient Schottky diodes and MOSFETs for demanding power control applications. Complemented by precision proximity sensors and highly reliable reed and solid-state relays, Littelfuse delivers the critical building blocks required for secure, efficient, and complete system design.

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