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05098.R7 5/18 Page 1
05098
PSRDA70-4
ULTRA LOW CAPACITANCE STEERING DIODE ARRAY
ISO 9001: 2015 CERTIFIED
DESCRIPTION
The PSRDA70-4 is an ultra low capacitance steering diode array designed to protect circuit applicaons from the ef-
fects of Electrostac Discharge (ESD) and Electrical Fast Transients (EFT). Its ultra low capacitance allows maintenance
of signal integrity for high-speed data lines while protecng the circuit ICs from the damage of severe transients. This
device is designed for the protecon of four lines.
Packaged in an SO-8 conguraon, this device meets all the applicable voltage immunity standards, including IEC
61000-4-2 (ESD), 61000-4-4 (EFT) and 61000-4-5 (Surge).
FEATURES
Compable with IEC 61000-4-2 (ESD): Air - 15kV, Contact - 8kV
Compable with IEC 61000-4-4 (EFT): 40A - 5/50ns
Compable with IEC 61000-4-5 (Surge): 24A, 8/20µs - Level 2(Line-
Gnd) & Level 3(Line-Line)
Provides 4 Lines/Ports of Protecon
Low Leakage Current
Ultra Low Capacitance: 6pF Typical
RoHS Compliant
REACH Compliant
MECHANICAL CHARACTERISTICS
Molded JEDEC SO-8 Package
Approximate Weight: 70 milligrams
Lead-Free Pure-Tin Plang (Annealed)
Solder Reow Temperature:
Pure-Tin - Sn, 100: 260-270°C
12mm Tape and Reel Per EIA Standard 481
Flammability Rang UL 94V-0
APPLICATIONS
Ethernet 10/100/1000 Base T
RS-422 and RS-485
Microcontrollers
USB Interface
PIN CONFIGURATION

I/O VCC VCC I/O
GND I/O I/O GND
1 2 4
8
3
567
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05098
PSRDA70-4
ISO 9001: 2015 CERTIFIED
TYPICAL DEVICE CHARACTERISTICS
MAXIMUM RATINGS 
PARAMETER SYMBOL VALUE UNITS
Operang Temperature TA-55 to 150 °C
Storage Temperature TSTG -55 to 150 °C
Connuous Power Dissipaon PPC 500 mW
ELECTRICAL CHARACTERISTICS PER LINE 
PART
NUMBER
DEVICE

REPETITIVE

REVERSE
VOLTAGE
VRRM
VOLTS
MAXIMUM
FORWARD
VOLTAGE
mA
VF
VOLTS
MAXIMUM
FORWARD

CURRENT
(Fig. 1)
µs
IFM
AMPS
MAXIMUM
REVERSE

CURRENT
RRM
IR
µA
TYPICAL
CAPACITANCE
(Note 1)
z
CJ
pF
PSRDA70-4 PRG 70 1.1 24 56
NOTE
1. Between line and ground, Cj = CMEAS/2.
TEST
WAVEFORM
PARAMETERS
tf = 8µs
td = 20µs
tf
e-t
Peak Value IPP
td = t/(IPP/2)
FIGURE 1
PULSE WAVE FORM
t - Time - µs
0 5 10 15 20 25 30
IPP - Peak Pulse Current - % of IPP
0
20
40
60

100
120
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05098
PSRDA70-4
ISO 9001: 2015 CERTIFIED
SPICE MODEL

PARAMETER UNIT LCRD
BV V200
IBV µA 0.01
Cjo pF 5
ISA1E-13
Vj V 0.6
M - 0.33
N - 1
RSOhms 0.31
TT s1E-9
EG eV 1.11
FIGURE 1
SPICE MODEL
LCRD: Low Capacitance Recer Diode
Lg - Lead Inductance
LCRD
Lg
0.7nH
VCC
LCRD
I/O
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05098
PSRDA70-4
ISO 9001: 2015 CERTIFIED
SO-8 PACKAGE INFORMATION
OUTLINE DIMENSIONS
DIM MILLIMETERS INCHES
MIN MAX MIN MAX
A4.80 5.00 0.189 0.196
B 3.80 4.00 0.150 0.157
C 1.35 1.75 0.054 0.068
D0.35 0.49 0.014 0.019
F 0.40 1.25 0.016 0.049
G1.27 BSC 0.05 BSC
J0.18 0.25 0.007 0.009
K0.10 0.25 0.004 0.008
P5.80 6.20 0.229 0.244
R0.25 0.50 0.010 0.019
NOTES
1. -T- = Seang plane and datum surface.
2. Dimensions “A” and “B” are datum.
3. Dimensions “A” and “B” do not include mold protrusion.
4. Maximum mold protrusion is 0.015” (0.380mm) per side.
5. Dimensioning and tolerances per ANSI Y14.5M, 1982.
6. Dimensions are exclusive of mold ash and metal burrs.
PAD LAYOUT DIMENSIONS
DIM MILLIMETERS INCHES
MIN MAX MIN MAX
A1.14 1.40 0.045 0.055
B 0.64 0.89 0.025 0.035
C 6.22 -0.245 -
D3.94 4.17 0.155 0.165
E 1.02 1.27 0.040 0.050
NOTES
1. Controlling dimension: inches.
-A-
8 5
14
-B- P
GD
-T-
C
K J
R x 45°
0° - 10°
F
4 PL
0.010” (0.25mm) MB
+
8 PL
0.010” (0.25mm) B
+AT
A
B
CD
E
M
MSS
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05098
PSRDA70-4
ISO 9001: 2015 CERTIFIED
TAPE AND REEL
User Direcon of Feed
t
K0
A0 P
D
P0
P2 E
B0
F
W
10 Pitches Cumulave
Tolerance on tape ± 0.2
ORDERING INFORMATION
BASE PART NUMBER LEADFREE SUFFIX TAPE SUFFIX  REEL SIZE TUBE QTY
PSRDA70-4 -LF -T7 1,000 7” 98
PSRDA70-4 -LF -T13 2,500 13” 98
This device is only available in a Lead-Free conguraon.
SPECIFICATIONS
REEL DIA. TAPE
WIDTH A0 B0  D E F W P0 P2 P tmax
178mm (7”) 12mm 6.50 ± 0.10 5.40 ± 0.10 2.00 ± 0.10 1.50 ± 0.10 1.75 ± 0.10 5.50 ± 0.05 12.00 ± 0.30 4.00 ± 0.12 2.00 ± 0.10 8.00 ± 0.10 0.25
NOTES
1. Dimensions are in millimeters.
2. Surface mount product is taped and reeled in accordance with EIA-481.
3. Sux - T7 = 7” Reel - 1,000 pieces per 12mm tape.
4. Sux - T13 = 13” Reel - 2,500 pieces per 12mm tape.
5. Bulk product shipped in tubes of 98 pieces per tube.
6. Marking on Part - marking code (see page 2), date code, logo and pin one dened by dot on top of package.
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05098
PSRDA70-4
ISO 9001: 2015 CERTIFIED
COMPANY INFORMATION
COPYRIGHT © ProTek Devices 2003 - This literature is subject to all applicable copyright laws and is not for resale in any manner.
SPECIFICATIONS: ProTek reserves the right to change the electrical and or mechanical characteriscs described herein without noce.
DESIGN CHANGES: ProTek reserves the right to disconnue product lines without noce and that the nal judgement concerning selecon and specicaons is the buyer’s and that in furnishing engineering
and technical assistance. ProTek assumes no responsibility with respect to the selecon or specicaons of such products. ProTek makes no warranty, representaon or guarantee regarding the suitability of
its products for any parcular purpose, nor does ProTek assume any liability arising out of the applicaon or use of any product or circuit and specically disclaims any and all liability without limitaon special,
consequenal or incidental damages.
LIFE SUPPORT POLICY: ProTek Devices products are not authorized for use in life support systems without wrien consent from the factory.
CONTACT US

2929 South Fair Lane
Tempe, Arizona 85282
USA
By Telephone
General: 602-431-8101
Sales: & Markeng: 602-414-5109
Customer Service: 602-414-5114
Product Technical Support: 602-414-5107
By Fax
General: 602-431-2288
By E-mail:
Asia Sales: asiasales@protekdevices.com
Europe Sales: europesales@protekdevices.com
U.S. Sales: ussales@protekdevices.com
Distributor Sales: distysales@protekdevices.com
Customer Service: service@protekdevices.com
Technical Support: support@protekdevices.com

8 Ubi Road 2, #06-19
Zervex
Singapore - 408538
Tel: +65-67488312
Fax: +65-67488313
Web
www.protekdevices.com
COMPANY PROFILE
In business more than 25 years, ProTek Devices™ is a privately held semiconductor company. The company oers a product line of overvoltage pro-
tecon and overcurrent protecon components. These include transient voltage suppressor array (TVS arrays) avalanche breakdown diode, steering
diode TVS array and electronics SMD chip fuses. These components deliver circuit protecon in electronic systems from numerous overvoltage and
overcurrent events. They include lightning; electrostac discharge (ESD); nuclear electromagnec pulses (NEMP); inducve switching; and elec-
tromagnec interference (EMI) / radio frequency interference (RFI). ProTek Devices also oers LED wafer die for ESD protecon and related high
frequency products. ProTek Devices is ISO 9001:2015 cered.