Circuit Protection – Mouser Singapore

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Gas Discharge Tube for RS-485 Ports

Bourns Gas Discharge Tube (GDT) for RS-485 Ports is designed to meet industry standards on RS-485 port interfaces and to provide circuit protection in noisy and harsh electrical environments. For exposed lines that may see large and fast surges and where failure is not acceptable, a three-stage Bourns protection system is recommended.

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Types of Circuit Protection

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Part #

ESD Protection Diodes / TVS Diodes 18V 400W UniDir

P4SMA18A
Bourns
1: $0.695
1,500In Stock
10,000Expected 8/5/2026

Mfr. Part No.
P4SMA18A

Mouser Part No
652-P4SMA18A

Bourns

ESD Protection Diodes / TVS Diodes 18V 400W UniDir

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Datasheet

1,500In Stock

10,000Expected 8/5/2026

Cut Tape

$0.695

$0.468

$0.265

$0.21

Reel

$0.125

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 5,000

ESD Protection Diodes / TVS Diodes 200V 400W UniDir

P4SMA200A
Bourns
1: $0.487
15,559In Stock

Mfr. Part No.
P4SMA200A

Mouser Part No
652-P4SMA200A

Bourns

ESD Protection Diodes / TVS Diodes 200V 400W UniDir

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Datasheet

15,559In Stock

Cut Tape

$0.487

$0.329

$0.14

$0.135

Reel

$0.104

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 5,000

ESD Protection Diodes / TVS Diodes 20V 400W BiDir

P4SMA20CA
Bourns
1: $0.653
178In Stock
10,000Expected 17/8/2026

Mfr. Part No.
P4SMA20CA

Mouser Part No
652-P4SMA20CA

Bourns

ESD Protection Diodes / TVS Diodes 20V 400W BiDir

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Datasheet

178In Stock

10,000Expected 17/8/2026

Cut Tape

$0.653

$0.463

$0.295

$0.22

Reel

$0.14

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 5,000

ESD Protection Diodes / TVS Diodes 220V 400W UniDir

P4SMA220A
Bourns
1: $0.403
9,945In Stock

Mfr. Part No.
P4SMA220A

Mouser Part No
652-P4SMA220A

Bourns

ESD Protection Diodes / TVS Diodes 220V 400W UniDir

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Datasheet

9,945In Stock

Cut Tape

$0.403

$0.402

$0.279

$0.225

Reel

$0.19

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 5,000

ESD Protection Diodes / TVS Diodes 250V 400W UniDir

P4SMA250A
Bourns
1: $0.834
4,590In Stock

Mfr. Part No.
P4SMA250A

Mouser Part No
652-P4SMA250A

Bourns

ESD Protection Diodes / TVS Diodes 250V 400W UniDir

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Datasheet

4,590In Stock

Cut Tape

$0.834

$0.516

$0.328

$0.272

Reel

$0.172

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 5,000

ESD Protection Diodes / TVS Diodes 250V 400W BiDir

P4SMA250CA
Bourns
1: $1.22
4,810In Stock

Mfr. Part No.
P4SMA250CA

Mouser Part No
652-P4SMA250CA

Bourns

ESD Protection Diodes / TVS Diodes 250V 400W BiDir

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Datasheet

4,810In Stock

Cut Tape

$1.22

$0.759

$0.492

$0.377

Reel

$0.246

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 5,000

ESD Protection Diodes / TVS Diodes 30V 400W UniDir

P4SMA30A
Bourns
1: $0.556
3,453In Stock
10,000Expected 23/7/2026

Mfr. Part No.
P4SMA30A

Mouser Part No
652-P4SMA30A

Bourns

ESD Protection Diodes / TVS Diodes 30V 400W UniDir

Learn More

Datasheet

3,453In Stock

10,000Expected 23/7/2026

Cut Tape

$0.556

$0.368

$0.193

$0.163

Reel

$0.107

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 5,000

ESD Protection Diodes / TVS Diodes 30V 400W BiDir

P4SMA30CA
Bourns
1: $0.751
1,568In Stock
10,000Expected 22/4/2026

Mfr. Part No.
P4SMA30CA

Mouser Part No
652-P4SMA30CA

Bourns

ESD Protection Diodes / TVS Diodes 30V 400W BiDir

Learn More

Datasheet

1,568In Stock

10,000Expected 22/4/2026

Cut Tape

$0.751

$0.459

$0.292

$0.228

Reel

$0.135

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 5,000

ESD Protection Diodes / TVS Diodes 33V 400W UniDir

P4SMA33A
Bourns
1: $0.375
5,990In Stock

Mfr. Part No.
P4SMA33A

Mouser Part No
652-P4SMA33A

Bourns

ESD Protection Diodes / TVS Diodes 33V 400W UniDir

Learn More

Datasheet

5,990In Stock

Cut Tape

$0.375

$0.253

$0.136

$0.131

Reel

$0.107

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 5,000

ESD Protection Diodes / TVS Diodes 33V 400W BiDir

P4SMA33CA
Bourns
1: $0.306
5,635In Stock
10,000Expected 20/4/2026

Mfr. Part No.
P4SMA33CA

Mouser Part No
652-P4SMA33CA

Bourns

ESD Protection Diodes / TVS Diodes 33V 400W BiDir

Learn More

Datasheet

5,635In Stock

10,000Expected 20/4/2026

Cut Tape

$0.306

$0.193

Reel

$0.164

$0.115

MouseReel Available

Min.: 1
Mult.: 1

Reel: 5,000

ESD Protection Diodes / TVS Diodes 350V 400W BiDir

P4SMA350CA
Bourns
1: $0.834
1,406In Stock

Mfr. Part No.
P4SMA350CA

Mouser Part No
652-P4SMA350CA

Bourns

ESD Protection Diodes / TVS Diodes 350V 400W BiDir

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Datasheet

1,406In Stock

Cut Tape

$0.834

$0.619

$0.423

$0.334

$0.274

Reel

$0.229

MouseReel Available

Min.: 1
Mult.: 1

Reel: 5,000

ESD Protection Diodes / TVS Diodes 36V 400W UniDir

P4SMA36A
Bourns
1: $0.487
10,163In Stock

Mfr. Part No.
P4SMA36A

Mouser Part No
652-P4SMA36A

Bourns

ESD Protection Diodes / TVS Diodes 36V 400W UniDir

Learn More

Datasheet

10,163In Stock

Cut Tape

$0.487

$0.329

$0.138

$0.136

Reel

$0.124

$0.10

MouseReel Available

Min.: 1
Mult.: 1

Reel: 5,000

ESD Protection Diodes / TVS Diodes 39V 400W UniDir

P4SMA39A
Bourns
1: $0.348
9,398In Stock
10,000Expected 22/4/2026

Mfr. Part No.
P4SMA39A

Mouser Part No
652-P4SMA39A

Bourns

ESD Protection Diodes / TVS Diodes 39V 400W UniDir

Learn More

Datasheet

9,398In Stock

10,000Expected 22/4/2026

Cut Tape

$0.348

$0.22

$0.124

Reel

$0.10

MouseReel Available

Min.: 1
Mult.: 1

Reel: 5,000

ESD Protection Diodes / TVS Diodes 39V 400W BiDir

P4SMA39CA
Bourns
1: $0.737
10,086In Stock

Mfr. Part No.
P4SMA39CA

Mouser Part No
652-P4SMA39CA

Bourns

ESD Protection Diodes / TVS Diodes 39V 400W BiDir

Learn More

Datasheet

10,086In Stock

Cut Tape

$0.737

$0.461

$0.293

$0.235

Reel

$0.152

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 5,000

ESD Protection Diodes / TVS Diodes 43V 400W BiDir

P4SMA43CA
Bourns
1: $0.751
3,958In Stock

Mfr. Part No.
P4SMA43CA

Mouser Part No
652-P4SMA43CA

Bourns

ESD Protection Diodes / TVS Diodes 43V 400W BiDir

Learn More

Datasheet

3,958In Stock

Cut Tape

$0.751

$0.463

$0.295

$0.236

Reel

$0.142

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 5,000

ESD Protection Diodes / TVS Diodes 47V 400W UniDir

P4SMA47A
Bourns
1: $0.695
304In Stock

Mfr. Part No.
P4SMA47A

Mouser Part No
652-P4SMA47A

Bourns

ESD Protection Diodes / TVS Diodes 47V 400W UniDir

Learn More

Datasheet

304In Stock

Cut Tape

$0.695

$0.468

$0.268

$0.195

Reel

$0.122

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 5,000

ESD Protection Diodes / TVS Diodes 51V 400W BiDir

P4SMA51CA
Bourns
1: $0.751
6,980In Stock

Mfr. Part No.
P4SMA51CA

Mouser Part No
652-P4SMA51CA

Bourns

ESD Protection Diodes / TVS Diodes 51V 400W BiDir

Learn More

Datasheet

6,980In Stock

Cut Tape

$0.751

$0.463

$0.295

$0.236

Reel

$0.147

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 5,000

ESD Protection Diodes / TVS Diodes 530V 400W UniDir

P4SMA530A
Bourns
1: $0.765
4,165In Stock

Mfr. Part No.
P4SMA530A

Mouser Part No
652-P4SMA530A

Bourns

ESD Protection Diodes / TVS Diodes 530V 400W UniDir

Learn More

Datasheet

4,165In Stock

Cut Tape

$0.765

$0.578

$0.395

$0.311

Reel

$0.229

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 5,000

ESD Protection Diodes / TVS Diodes 6.8V 400W UniDir

P4SMA6.8A
Bourns
1: $0.487
9,327In Stock

Mfr. Part No.
P4SMA6.8A

Mouser Part No
652-P4SMA6.8A

Bourns

ESD Protection Diodes / TVS Diodes 6.8V 400W UniDir

Learn More

Datasheet

9,327In Stock

Cut Tape

$0.487

$0.329

$0.146

$0.145

Reel

$0.118

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 5,000

ESD Protection Diodes / TVS Diodes 6.8V 400W BiDir

P4SMA6.8CA
Bourns
1: $0.459
6,949In Stock
10,000Expected 20/8/2026

Mfr. Part No.
P4SMA6.8CA

Mouser Part No
652-P4SMA6.8CA

Bourns

ESD Protection Diodes / TVS Diodes 6.8V 400W BiDir

Learn More

Datasheet

6,949In Stock

10,000Expected 20/8/2026

Cut Tape

$0.459

$0.334

$0.207

$0.179

$0.143

Reel

$0.115

MouseReel Available

Min.: 1
Mult.: 1

Reel: 5,000

ESD Protection Diodes / TVS Diodes 21V 400W UniDir

P4SMA62A
Bourns
1: $0.681
8,227In Stock

Mfr. Part No.
P4SMA62A

Mouser Part No
652-P4SMA62A

Bourns

ESD Protection Diodes / TVS Diodes 21V 400W UniDir

Learn More

Datasheet

8,227In Stock

Cut Tape

$0.681

$0.467

$0.264

$0.209

Reel

$0.142

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 5,000

ESD Protection Diodes / TVS Diodes 68V 400W UniDir

P4SMA68A
Bourns
1: $0.681
900In Stock

Mfr. Part No.
P4SMA68A

Mouser Part No
652-P4SMA68A

Bourns

ESD Protection Diodes / TVS Diodes 68V 400W UniDir

Learn More

Datasheet

900In Stock

Cut Tape

$0.681

$0.459

$0.264

$0.209

Reel

$0.111

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 5,000

ESD Protection Diodes / TVS Diodes 75V 400W BiDir

P4SMA75CA
Bourns
1: $0.751
5,460In Stock

Mfr. Part No.
P4SMA75CA

Mouser Part No
652-P4SMA75CA

Bourns

ESD Protection Diodes / TVS Diodes 75V 400W BiDir

Learn More

Datasheet

5,460In Stock

Cut Tape

$0.751

$0.463

$0.295

$0.217

Reel

$0.157

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 5,000

ESD Protection Diodes / TVS Diodes 82V 400W UniDir

P4SMA82A
Bourns
1: $0.695
4,900In Stock

Mfr. Part No.
P4SMA82A

Mouser Part No
652-P4SMA82A

Bourns

ESD Protection Diodes / TVS Diodes 82V 400W UniDir

Learn More

Datasheet

4,900In Stock

Cut Tape

$0.695

$0.468

$0.265

$0.21

Reel

$0.133

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 5,000

ESD Protection Diodes / TVS Diodes 10V 600W BiDir

P6SMB10CA
Bourns
1: $0.528
10,040In Stock

Mfr. Part No.
P6SMB10CA

Mouser Part No
652-P6SMB10CA

Bourns

ESD Protection Diodes / TVS Diodes 10V 600W BiDir

Learn More

Datasheet

10,040In Stock

Cut Tape

$0.528

$0.389

$0.263

$0.204

Reel

$0.146

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 3,000

Gas Discharge Tube for RS-485 Ports

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