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UA2/UB2 Series

Features | Applications | Specifications | Dimensions | Pad Layout | Markings | Schematics
Part Number System | Nominal Lineup | Safety Standard and Rating | Recommended Relay Drive Conditions
Performance Data | Tube Package | Tape Package | Soldering Temperature Condition

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Notes on Correct Use (PDF-52K)

Features

NEC’s UA2/UB2 relay is a new generation slim package Miniature Signal Relay for use in high density applications.

CSAUR
  • Small mounting size for high density applications
  • Bellcore (2500 V surge coil to contacts) and FCC (1500 V) surge capability.
  • IEC950/UL1950/EN60950 spacing and high breakdown voltage. (Basic insulation class on 200 V working voltage)
  • Low power consumption 140 mW
  • 100mW version now available (contact WPI for details)

Applications

Electronic switching systems, PBX, terminal equipment, telephone system, test equipment.

Specifications

Contact Form
2 Form c
Contact Ratings Maximum Switching Power
30 W (resistive)
37.5 VA (resistive)
Maximum Switching Voltage
220 VAC
250 VAC
Maximum Switching Current
1 A
Maximum Carrying Current
1 A
Minimum Contact Ratings
10 mV.dc, 10 µA * 4
Initial Contact Resistance
100 mOhm typ. (Initial)
Contact Material
Silver alloy with gold alloy overlay
Nominal Operating Power Non-Latch Type
140mW (230 mW for 24V)
Single Coil Latch Type
100 to 120 mW
Operate Time (Excluding Bounce)
Approximately 2 ms
Release Time (Excluding Bounce)
Approximately 1 ms without diode
Insulation Resistance
1000 MOhm at 500 Vdc
Breakdown Voltage Between Open Contacts
1000 Vac for one minute (1500 V surge, 10 x 160 µs * 1 )
Between Adjacent Contacts
Between Coil and Contact
1500 Vac for one minute (2500 V surge, 2 x 10 µs * 2 )
Shock Resistance
735 m / s2 (75 G) (misoperating)
980 m / s2 (100 G) (destructive failure)
Vibration Resistance
10 to 55 Hz at double amplitude of 3 mm (20 G) (misoperating)
10 to 55 Hz, double amplitude of 5 mm (30 G) (Destructive failure)
Ambient Temperature
–40 to +85°C
Coil Temperature Rise
18 degrees at nominal coil voltage (140 mW)
Running Specifications No-load
5 x 107 * 3 operations (Non-latch type)
1 x 107 operations (Latch type)
Load
30 Vdc 1 A (resistive), 1 x 105 operations at 20°C
125 Vac 0.3 A (resistive), 1 x 105 operations at 20°C
Weight
Approximately 1 gram
*1  rise time :10 µs, fall time : 160 µs
*2  rise time :2 µs, fall time : 10 µs
*3  Number of operations without mechanical failure. Note, the number of operations under which steady electrical characteristics are maintained is 1 x 107 operations
*4  This value is a reference value based upon a resistive load. Minimum contact ratings change based upon switching frequency / drive characteristics, ambient temperature and load.

Dimensions

mm [inch]

UA2 Series

UB2 Series

STANDARD

MINIMUM FOOTPRINT TYPE (NUN TYPE)

Pad Layout

(bottom view) mm

UA2 Series

Note: General tolerance: ±0.1

UB2 Series

STANDARD

Note: General tolerance: ±0.1

MINIMUM FOOTPRINT TYPE (NUN TYPE)

Note: General tolerance: ±0.1

Markings

Schematics

(bottom view)

UA2 Series

UB2 Series

Part Number System

UA2
1		 - 3
2		 S
3		 NU
4
1 Series name
2 Nominal coil voltage
A numerical value of coil voltage (See Nominal Lineup)
3 Latch type
Nil : Non-latch type
S : Single coil latch type
4 Option
NU: Standard
NR: Silver-Nickel alloy contact (with Gold alloy overlay)
NJ: Trimmed lead type
NRJ: Trimmed lead type with Silver-Nickel alloy contact
UB2
1		 - 3
2		 S
3		 NU
4		 - L
5
1 Series name
2 Nominal coil voltage
A numerical value of coil voltage (See Nominal Lineup)
3 Latch type
Nil : Non-latch type
S : Single coil latch type
4 Option
NU: Standard
NR: Silver-Nickel alloy contact (with Gold alloy overlay)
NUN: Minimum footprint type
NRN: Minimum footprint type with Silver-Nickel alloy contact
5 Package
Nil: Tube
L: Embossed carrying tape (L type)
L6: Embossed carrying tape (L type) with MBB*

*MBB: Moisture Barrier Bag

Nominal Lineup

Non-latch Type
at 20°C

Nominal
 Coil Voltage 
(Vdc)		 Coil
Resistance
 (Ohm) ±10% 		  Must Operate 
Voltage
(Vdc)		  Must Release 
Voltage
(Vdc)		 Nominal
 operate power 
(mW)
1.5 16 1.13 0.15 140
3 64.3 2.25 0.3 140
4.5 145 3.38 0.45 140
5 178 3.75 0.5 140
6 257 4.5 0.6 140
9 579 6.75 0.9 140
12 1028 9.0 1.2 140
24 2504 18.0 2.4 230

Single-Coil Latch Type
at 20°C
Nominal
 Coil Voltage 
(Vdc)		 Coil
Resistance
 (Ohm) ±10% 		  Must Operate 
Voltage
(Vdc)		  Must Release 
Voltage
(Vdc)		 Nominal
 operate power 
(mW)
1.5 22.5 1.13 1.13 100
3 90 2.25 2.25 100
4.5 202.5 3.38 3.38 100
5 250 3.75 3.75 100
6 360 4.5 4.5 100
9 810 6.75 6.75 100
12 1440 9.0 9.0 100
24 4800 18.0 18.0 120

Safety Standard and Rating

UL Recognized
(UL508)*
File No. E73266		 CSA Certified
(CSA C22.2 No. 14)**
File No. LR46266
30 Vdc, 1A (Resistive)
110 Vdc, 0.3 A (Resistive)
125 Vac, 0.3 A (Resistive)

* Spacing: UL840
** Spacing : CSA std950

TUV Certified
(EN61810)
No.2050596
Creepage and clearance of coil to contact
is over than 2 mm (According EN60950)
Basic insulation class

Recommended Relay Drive Conditions

Drive under conditions. If it is impossible, please inquire to NEC/TOKIN

Nonlatch type
 Voltage : with ±5% at nominal voltage Ambient temperature
–40 to +85°C
Single coil latch type Square pulse (rise and fall time is repidly) pulse height : within ±5% at nominal voltage pulse width : more than 10 ms

Performance Data

Coil Temperature Rise
Temperature is measured by coil resistance.

Switching Capacity
This is allowed maximum value. Inquiry for NEC/TOKIN under maximum value at continuous use.

Maximum Coil Voltage
This is a maximum value of permissible alteration. Inquiry for NEC/TOKIN at continuous use.

Applied Voltage Vs. Timing (Sample : UA2-5NU)

Operate and Release Voltage Vs. Ambient Temperature
This shows a typical change of operate (release) voltage. Maximum value of operate is estimated, so it must be applied more than this value for safety operation. In case of “hot start operation”, please inquiry for NEC/TOKIN.

Running Test (Nonload)
(Load : None, Driving : 5V. DC, 50Hz, 50% duty, Ambient temperature : Room temperature, Sample : UA2-5NU 20 pieces)

Running Test (Load)
(Load : 50V. DC 0.1A resistive, Driving : 5V. DC, 5Hz, 50% duty, Ambient temperature : 85 degree C, Sample : UA2-5NU 10 pieces)

Breakdown Voltage
Sample: UA2-5NU 10 pieces

Alternation of Voltage at Densely Mounting (Magnet interference)

Tube Package (UA2, UB2)

Dimension of Package (Unit : mm)

Outline of Package

Tape Package (UB2)

Appearance

Tape Dimension mm (inch)

Relay Orientation Mark and Tape Carrying Direction

Soldering Temperature Condition

Through-hole mounting type (UA2)

Surface mounting type (UB2)

IRS Method

Note:
1. Temperature profile shows printed circuit board surface on the relay termianl portion.
2. Check the actual soldering to use other method except above mentioned temperature profiles.

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Phone: (707) 996-5201 Fax: (707) 996-3380 E-mail: sales@worldproducts.com

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Last updated: 12-30-05

1 Automatic soldering
Preheating : 100°C max. 1 minute max.
Solder temperature : 260°C max.
Solder time : 5 seconds max.
2 Manual soldering
Solder temperature : 350°C max.
Solder time : 3 seconds max.