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參數資料
| 型號： | 420LB28 |
| 廠商： | PROTEK DEVICES |
| 元件分類： | 保護電路 |
| 英文描述： | TELECOM, SURGE PROTECTION CIRCUIT, XMA |
| 文件頁數： | 1/3頁 |
| 文件大小： | 89K |
| 代理商： | 420LB28 |
TWO LINE PAIR 4-20mA CONTROL LOOP PROTECTOR
1
05048.R3 11/03
www.protekdevices.com
420LB28
thru
420LE60
APPLICATIONS
Multi-Process Control Loops
Fire & Security Systems
Petro-Chemical Plants
Refineries & Tank Farms
IEC COMPATIBILITY (EN61000-4)
61000-4-2 (ESD): Air - 15kV, Contact - 8kV
61000-4-4 (EFT): 40A - 5/50ns
61000-4-5 (Surge): 8/20s - 95A, Level 4 (Line-Gnd) & 48A, Level 4 (Line-Line)
FEATURES
Designed for 4-20mA Current Loops
Automatic Reset - Does Not Interrupt Service
Permanent Two-Stage Line Pair Protection
Common Mode & Differential Mode Protection
Subnanosecond Response Time
Effective Against Lightning, Inductive Switching and ESD
MECHANICAL CHARACTERISTICS
Weight: 420LB - 28 grams & 420LE - 142 grams (Approximate)
Flammability Rating UL 94V-0
Device Marking:
Case - Logo, Terminal Designations & Part Number
Board - Logo, Date Code & Part Number
DESCRIPTION
The 420LE/B series is a two stage transient voltage protector providing primary and secondary
protection against lightning, inductive switching and electrostatic discharge (ESD) transient
threats. The first stage diverts the transient current through the ground terminal return path and
the second stage clamps the voltage to a safe level without interruption of service.
The 420LE/B series is designed to protect data lines from differential (line to line) and common
mode (line to ground) transients. Terminals 1 and 2, 3 and 4 for the 420LE and pins 2 and 3, 4,
and 5 for the 420LB are designated as line pairs. Each line pair is referenced to ground. A
transient voltage suppressor is connected across each line pair for differential mode protection.
Each line pair is referenced to ground.
This product can also be used on telephone, signal/data lines, security, timing and control
interface circuits. For most applications, the product should be located as close as possible to
the equipment being protected. A low impedance grounding system is important to maintain a
low voltage clamp between the line-to-ground connection.
05048
420LB
420LE
相關PDF資料 |
PDF描述 |
|---|---|
| 420LB35 | TELECOM, SURGE PROTECTION CIRCUIT, XMA |
| 420LB60 | TELECOM, SURGE PROTECTION CIRCUIT, XMA |
| 421-13-206-41-001100 | DIP6, IC SOCKET |
| 422-43-250-41-001000 | DIP50, IC SOCKET |
| 422-43-252-41-001000 | DIP52, IC SOCKET |
相關代理商/技術參數 |
參數描述 |
|---|---|
| 420LB28_12 | 制造商:PROTEC 制造商全稱:Protek Devices 功能描述:TWO LINE PAIR 4-20mA CONTROL LOOP PROTECTOR |
| 420LB35 | 制造商:PROTEC 制造商全稱:Protek Devices 功能描述:TWO LINE PAIR 4-20mA CONTROL LOOP PROTECTOR |
| 420LB60 | 制造商:PROTEC 制造商全稱:Protek Devices 功能描述:TWO LINE PAIR 4-20mA CONTROL LOOP PROTECTOR |
| 420LC-5VDC-10000HR | 制造商:Curtis Instruments 功能描述: |
| 420LE28 | 制造商:PROTEC 制造商全稱:Protek Devices 功能描述:TWO LINE PAIR 4-20mA CONTROL LOOP PROTECTOR |
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