420LB28

更新时间： 2024-01-27 04:56:56

品牌	Logo	应用领域
PROTEC		电信集成电路电信电路电信保护电路
页数	文件大小	规格书
3页	125K
描述
TWO LINE PAIR 4-20mA CONTROL LOOP PROTECTOR

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420LB28 技术参数

是否无铅：	含铅	是否Rohs认证：	不符合
生命周期：	Active	包装说明：	,
Reach Compliance Code：	compliant	HTS代码：	8542.39.00.01
风险等级：	5.6	Is Samacsys：	N
JESD-30 代码：	R-XXMA-X	JESD-609代码：	e0
功能数量：	1	最高工作温度：	100 °C
最低工作温度：	-55 °C	封装主体材料：	UNSPECIFIED
封装形状：	RECTANGULAR	封装形式：	MICROELECTRONIC ASSEMBLY
峰值回流温度（摄氏度）：	245	认证状态：	Not Qualified
表面贴装：	NO	电信集成电路类型：	SURGE PROTECTION CIRCUIT
温度等级：	OTHER	端子面层：	TIN LEAD
端子形式：	UNSPECIFIED	端子位置：	UNSPECIFIED
处于峰值回流温度下的最长时间：	NOT SPECIFIED	Base Number Matches：	1

420LB28 数据手册

420LE28

thru

420LB60

Only One Name Means ProTek’Tion™

TWO LINE PAIR 4-20mA CONTROL LOOP PROTECTOR

APPLICATIONS

420LB

✔ 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): 8/20µs - 95A, Level 4 (Line-Gnd) & 48A, Level 4 (Line-Line)

FEATURES

420LE

✔ Designed for 4-20mA Current Loops

✔ Automatic Reset - Does Not Interrupt Service

✔ PermanentTwo-Stage Line Pair Protection

✔ Common Mode & Differential Mode Protection

✔ Subnanosecond ResponseTime

✔ 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.R3 11/03

www.protekdevices.com

12 3

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420LB28_12	PROTEC	TWO LINE PAIR 4-20mA CONTROL LOOP PROTECTOR	获取价格
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420LB60	PROTEC	TWO LINE PAIR 4-20mA CONTROL LOOP PROTECTOR	获取价格
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420LE35	PROTEC	TWO LINE PAIR 4-20mA CONTROL LOOP PROTECTOR	获取价格
420LE60	PROTEC	TWO LINE PAIR 4-20mA CONTROL LOOP PROTECTOR	获取价格

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