CENTIGRID AND TO-5
SERIES
712
COMMERCIAL
TO-5 RELAYS
DPDT
SERIES
RELAY TYPE
DESIGNATION
712 DPDT basic relay
712D DPDT relay with internal diode for coil transient suppression
712TN DPDT relay with internal transistor driver and coil transient suppression diode
INTERNAL CONSTRUCTION DESCRIPTION
The TO-5 relay, originally conceived and developed by Teledyne, has become
UNI-FRAME
one of the industry standards for low-level switching from dry circuit to 1
UPPER
ampere. Designed for high-density PC board mounting, the Series 712 relays
STATIONARY
CONTACT
ARMATURE are some of the most versatile ultraminiature relays available because of their
small size and low coil power dissipation.
LOWER
STATIONARY
CONTACT
The following unique construction features and manufacturing techniques
provide excellent resistance to environmental extremes and overall high
MOVING
CONTACT
reliability:
All welded construction.
Unique uni-frame design providing high magnetic efficiency and mechanical
rigidity.
High force/mass ratios for resistance to shock and vibration.
Advanced cleaning techniques provide maximum assurance of internal
cleanliness.
Precious metal alloy contact material with gold plating assures excellent
high current and dry circuit switching capabilities.
The Series 712D relay has an internal discrete silicon diode for coil transient
suppression. The hybrid Series 712TN relay has an internal silicon diode and
ENVIRONMENTAL AND
transistor driver. The integrated packaging of the relay with its associated
PHYSICAL SPECIFICATIONS
semiconductor devices greatly reduces PC board floor space requirements as
Storage 65C to +125C
Temperature
well as component installation costs.
(Ambient)
Operating 55C to +85C
By virtue of its inherently low intercontact capacitance and contact circuit
Vibration
10 gs to 500 Hz
(General Note 1)
losses, the 712 has proven to be excellent ultraminiature RF switch for
frequency ranges well into the UHF spectrum. A typical RF application for the
Shock 30 gs,
(General Note 1) 6 msec, half-sine TO-5 relay is in handheld radio transceivers, wherein the combined features of
good RF performance, small size, low coil power dissipation and high reliability
Enclosure Hermetically sealed
make it a preferred method of Transmit-Receive switching (see Figure 1).
Weight 0.09 oz. (2.6g) max.
712 Page 93 SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE 2009 TELEDYNE RELAYS
www.teledynerelays.com 712/0909/Q3INSERTION LOSS
SERIES 712
GENERAL ELECTRICAL SPECIFICATIONS (@25C) (Notes 2 & 3)
Contact Arrangement 2 Form C (DPDT)
Rated Duty Continuous
Contact Resistance 0.15 ohm max. before life; 0.25 ohm max. after life at 1A/28Vdc (measured 1/8" from header)
Resistive: 1 Amp/28Vdc
Contact Load Ratings (DC)
Inductive: 200 mA/28Vdc (320 mH)
(See Fig. 2 for other DC
Lamp: 100 mA/28Vdc
resistive voltage/current ratings)
Low Level: 10 to 50 A/10 to 50mV
Resistive: 250 mA/115Vac, 60 and 400 Hz (Case not grounded)
Contact Load Ratings (AC)
100 mA/115Vac, 60 and 400 Hz (Case grounded)
10,000,000 cycles (typical) at low level
Contact Life Ratings 1,000,000 cycles (typical) at 0.5A/28Vdc resistive
100,000 cycles min. at all other loads specified above
Contact Overload Rating 2A/28Vdc Resistive (100 cycles min.)
Contact Carry Rating Contact factory
Coil Operating Power 450 milliwatts typical at nominal rated voltage
Operate Time 4.0 msec max. at nominal rated coil voltage
Release Time 712: 3.0 msec max. 712D, 712TN: 6.0 msec max.
Intercontact Capacitance 0.4 pf typical
Insulation Resistance 1,000 megohms min. between mutually isolated terminals
Dielectric Strength Atmospheric pressure: 350 Vrms/60Hz
Negative Coil Transient (Vdc) 712D, 712TN 2.0 max
Diode P.I.V. (Vdc) 712D, 712TN 60 min.
Base Voltage to Turn Off (Vdc) 0.3 min
712TN Transistor
Emitter-base breakdown Voltage (BVEBO) (Vdc) 6.0 min
Characteristics
Collector-base breakdown Voltage (BVCBO) (@25C & lc = 100 A) (Vdc) 60 min
DETAILED ELECTRICAL SPECIFICATIONS (@25C) (Note 3)
BASE PART 712-5 712-6 712-9 712-12 712-18 712-26
NUMBERS 712D-5 712D-6 712D-9 712D-12 712D-18 712D-26
(See Note 8 for full P/N example)
712TN-5 712TN-6 712TN-9 712TN-12 712TN-18 712TN-26
Nom. 5.0 6.0 9.0 12.0 18.0 26.5
Coil Voltage (Vdc)
Max. 5.8 8.0 12.0 16.0 24.0 32.0
Coil Resistance (Ohms 20% @25C) (712TN: See Note 4) 50 98 220 390 880 1560
Pick-up Voltage (Vdc, Max.) Pulse Operated 3.6 4.2 6.5 8.4 13.0 17.0
712TN Base Current to Turn On (mAdc, Min.) 3.00 2.04 1.36 1.03 0.68 0.50
PERFORMANCE CURVES (Note 2)
TYPICAL RF PERFORMANCE TYPICAL DC CONTACT RATING (RESISTIVE)
0
.1
300
.2
.3 250
.4
200
10 1.92
20 1.22
150
30 1.07
100
40 1.02
50 1.01
50
60 1.00
70 1.00
.01 0.5 .1 .5 1.0
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
LOAD CURRENT (AMPS DC)
FREQUENCY (GHz)
FIGURE 1 FIGURE 2
2009 TELEDYNE RELAYS SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE 712 Page 94
www.teledynerelays.com 712/0909/Q3
RETURN LOSS (VSWR)
ISOLATION ACROSS POLES
ISOLATION ACROSS CONTACTS
CENTIGRID AND TO-5
dB
VSWR
LOAD VOLTAGE (VDC)