172-12

## **CENTIGRID[®] COMMERCIAL RELAYS DPDT** 

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SERIES<br>172<br>**----- End of picture text -----**<br>


|**SERIES**<br>**DESIGNATION**|**RELAY TYPE**|
|---|---|
|172|DPDT basic relay|
|172D|DPDT relay with internal diode for coil transient suppression|



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INTERNAL CONSTRUCTION<br>UPPER<br>STATIONARY UNI-FRAME<br>CONTACT<br>bagaatl ARMATURE<br>NN Lm<br>LOWER<br>STATIONARY<br>CONTACT<br>MOVING<br>CONTACT<br>**----- End of picture text -----**<br>


## **DESCRIPTION** 

The 172 Centigrid[®] relay is an ultraminiature, hermetically sealed, armature relay for commercial applications. Its low profile height (.280") and .100" grid spaced terminals, which preclude the need for spreader pads, make it an ideal choice where extreme packaging density and/or close PC board spacing are required. 

The basic operating concept and internal structure are similar to Teledyne’s DPDT 114 Centigrid[®] relay. Unique construction features and manufacturing techniques provide overall high reliability and excellent resistance to environmental extremes: 

- 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. 

## **ENVIRONMENTAL AND PHYSICAL SPECIFICATIONS** 

|**ENVIRONMENTAL AND**<br>**PHYSICAL SPECIFICATIONS**|**ENVIRONMENTAL AND**<br>**PHYSICAL SPECIFICATIONS**|**ENVIRONMENTAL AND**<br>**PHYSICAL SPECIFICATIONS**|
|---|---|---|
|**Temperature**<br>(Ambient)|**Storage**|–65°C to +125°C|
||**Operating**|–55°C to +85°C|
|**Vibration**<br>(General Note 1)||10 g’s to 500 Hz|
|**Shock**<br>(General Note 1)||30 g’s,<br>6 msec, half-sine|
|**Enclosure**||Hermetically sealed|
|**Weight**||0.15 oz. (4.3g) max.|



The Series 172 relay has an internal discrete silicon diode for coil transient suppression. 

By virtue of its inherently low intercontact capacitance and contact circuit losses, the 172 relay is an excellent subminiature RF switch for frequencies well into the UHF spectrum (see Figure 1). Applications include telecommunications, test instruments, mobile communications, attenuators, and automatic test equipment. 

SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE www.teledynerelays.com 

©2003 TELEDYNE RELAYS 172/1203/Q1 

172  Page 91 

## **SERIES 172** 

## **GENERAL ELECTRICAL SPECIFICATIONS  (@25°C) (Notes 2 & 3)** 

|**Contact Arrangement**|2 Form C (DPDT)|
|---|---|
|**Rated Duty**|Continuous|
|**Contact Resistance**|0.15 ohm max. before life; 0.3 ohm max. after life at 1A/28Vdc (measured 1/8" from header)|
|**Contact Load Ratings (DC)**<br>(See Fig. 1 for other DC<br>resistive voltage/current ratings)|Resistive:<br>1 Amp/28Vdc<br>Inductive:<br>200 mA/28Vdc (320 mH)<br>Lamp:<br>100 mA/28Vdc<br>Low Level:<br>10 to 50 µA/10 to 50mV|
|**Contact Life Ratings**|5,000,000 cycles (typical) at low level<br>500,000 cycles (typical) at 0.5A/28Vdc resistive<br>100,000 cycles min. at all other loads specified above|
|**Contact Overload Rating**|2A/28Vdc Resistive (100 cycles min.)|
|**Contact Carry Rating**|Contact factory|
|**Operate Time**|6.0 msec max. at nominal rated coil voltage|
|**Release Time**|172: 3.0 msec max.<br>172D: 6.0 msec max.|
|**Intercontact Capacitance**|0.4 pf typical|
|**Insulation Resistance**|1,000 megohms min. between mutually isolated terminals|
|**Dielectric Strength**|Atmospheric pressure: 300 Vrms/60Hz|
|**Negative Coil Transient**172|2.0 Vdc Max.|
|**Diode P.I.V.** 172D|60 Vdc Min.|



## **DETAILED ELECTRICAL SPECIFICATIONS  (@25°C) (Note 3)** 

||**BASE PART**<br>**NUMBERS**|**172-5**<br>**172D-5**|**172-12**<br>**172D-12**|**172-26**<br>**172D-26**|
|---|---|---|---|---|
|**Coil Voltage (Vdc)**|Nom.|5.0|12.0|26.5|
||Max.|5.8|16.0|32.0|
|**Coil Resistance (Ohms ±20%)**||64|400|1600|
|**Pick-up Voltage (Vdc, Max.) Pulse Operation**||3.8|9.0|18.0|
|**Coil Operating Power at Nominal Voltage (Milliwatts)**||405|360|440|



## **OUTLINE DIMENSIONS (Note 4)** 

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CASE DETAIL TERMINAL LOCATIONS<br>(Viewed from Terminals, Numbers for Reference Only)<br>.750 MIN. . 280 MAX* .031 REF .035 REF<br>(19.05) (7.11) (.79) (.89)<br>7 8 1<br>.335 SQ MAX. 6 2<br>(8.51) .100 .010 TYP<br>5 4 3 (2.54 .25)<br>+.002<br>.017           DIA–.001 .335<br>+.05 SQ MAX.<br>(.43         )–.03 (8.51)<br>DIMENSIONS ARE SHOWN IN INCHES (MILLIMETERS)<br>*Unless otherwise specified, 0.280 (7.11) or 0.380 (9.65) height may be supplied. To order the lower profile<br>exclusively, add /28 to the part number, e.g. 172-26/28 (Note: /28 not marked on part).<br>PERFORMANCE CURVES (Note 2)<br>TYPICAL RF PERFORMANCE TYPICAL DC CONTACT RATING (RESISTIVE)<br>0<br>.1<br>.2 300<br>.3<br>250<br>.4<br>10 1.92 200<br>20 1.22 150<br>30 1.07<br>40 1.02 100<br>50 1.01 50<br>60 1.00<br>70 1.00 0  0.1  0.2  0.3  0.4  0.5  0.6  0.7  0.8  0.9  1.0<br>.01  0.5  .1  .5  1.0<br>FREQUENCY (GHz) LOAD CURRENT (AMPS DC)<br>FIGURE 1 FIGURE 2<br>RETURN LOSS (VSWR)<br>ISOLATION ACROSS POLES<br>INSERTION LOSS<br>ISOLATION ACROSS CONTACTS<br>dB<br>VSWR LOAD VOLTAGE (VDC)<br>**----- End of picture text -----**<br>


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SCHEMATIC DIAGRAM<br>**----- End of picture text -----**<br>


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172<br>172D<br>SCHEMATIC IS VIEWED FROM TERMINALS<br>**----- End of picture text -----**<br>


## **GENERAL NOTES** 

1. Relay contacts will exhibit no chatter in excess of 10 µsec or transfer in excess of 1 µsec. 

2. “Typical” characteristics are based on available data and are best estimates. No on-going verification tests are performed. 

3. Unless otherwise specified, parameters are initial values. 

4. Relays can be supplied with a spacer pad. See appendix. 

©2003 TELEDYNE RELAYS 

SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE www.teledynerelays.com 

172  Page 92 172/1203/Q1