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Ro VE LEA HS RS D CO I O N F R E M SA E PL R IA E NT *
Features

Lead free versions available (RoHS compliant*) Overcurrent/lightning protection to TELCORDIA GR-1089 Issue 3 Typical application is secondary protection on telecom line cards UL497A recognition Thermal fuse links Must be used in conjunction with a solid state primary protector, or a GDT primary protector
4A12P-1AH-12R5 - Surge Line Protection Module
Electrical Characteristics
Resistance Value ................................................................12.5 ohms Resistance Tolerance ..................................................................5 % TCR ..................................................................................100 ppm/C Ratio Tolerance ........................................................................0.5 % Temperature Range...................................................-40 C to +85 C
Functional Characteristics @ 25 C (Continued)
Second Level Lightning Surge Resistor package must fail safely causing no fire, electrical, or framentation hazard. 5000 Volts Peak, 500 Amp Peak Current, Max. Rise/Min. Decay Time 2x10 s: Number of Pulses ...............................1 simultaneous each polarity Second Level AC Power Fault Resistor package must fail safely causing no fire, electrical, or framentation hazard. Device will fail prior to Bussman MDQ 1-6/10 A fuse in series. 100 Vrms, 2.2 Amp Short Circuit Current: Duration...........................................................................15 minutes 600 Vrms, 7 Amp Short Circuit Current: Duration............................................................................5 seconds 250 Vrms, 25 Amp Short Circuit Current: Duration...........................................................................15 minutes 600 Vrms, 60 Amp Short Circuit Current: Duration............................................................................5 seconds
Physical Characteristics
Body Style ...........................................Dual In Line SMD - Twin Pack Substrate Material ........................................................96 % Alumina Lead Frame Material........................................Copper, solder coated Flammability .....................................................Conforms to UL94V-0 Processability................Unit is only suitable for no-clean processing Convection Reflow...................Unit will withstand 260 , 20 seconds Packaging............16 inch diameter reels, 44 mm tape, 250 pcs./reel
Functional Characteristics @ 25 C (per Telcordia GR-1089 Issue 3)
First Level Lightning Surge Resistors will remain within tolerance after testing. 1000 Volts Peak, 100 Amp Peak Current, Max. Rise/Min. Decay Time 10x1000 s, 60 Seconds Between Pulses: Number of Pulses ..............................25 each resistor each polarity 2500 Volts Peak, 500 Amp Peak Current, Max. Rise/Min. Decay Time 2x10 s, 60 Seconds Between Pulses: Number of Pulses .............................10 simultaneous each polarity Meets Protection Coordination as defined in Telcordia Section 4.6.7.1, Condition A. First Level AC Power Fault Resistors will remain within tolerance after testing.
Product Dimensions
TOP VIEW
40.64 .25 (1.600 .010)
24 22 19 18 15 13
1
3
6
7
10
12
SIDE VIEW
5.28 .013 (0.208 .005)
50 Vrms, 0.33 Amp Short Circuit Current: Duration...........................................................................15 minutes 100 Vrms, 0.17 Amp Short Circuit Current: Duration...........................................................................15 minutes 600 Vrms, 1.00 Amp Short Circuit Current: Duration.........................................................Sixty 1-second pulses 440 Vrms, 2.2 Amp Short Circuit Current: Duration .........................................................Five 2-second pulses, cooling to ambient between pulses 600 Vrms, 3.00 Amp Short Circuit Current: Duration ......................................................Five 1.1-second pulses, cooling to ambient between pulses
1 3
FRONT VIEW
12.70 .13 (0.500 .005)
14.10 .25 (0.555 .010 0.25 (0.010) 7.62 .13 (0.300 0.005) 5.08 .13 (0.200 0.005) 0.5 (0.020)
6.2 .25 (0.244 0.010)
BOTTOM VIEW
6 7 10 12
1.68 (0.066) 2.31 .25 (0.091 .010) 2.49 .25 (0.098 .010) 7.11 .25 (0.280 .010)
24
22
19 18
15
13
DIMENSIONS:
MM (INCHES)
*RoHS Directive 2002/95/EC Jan 27 2003 including Annex. Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications.
4A12P-1AH-12R5 - Surge Line Protection Module
How To Order Electrical Schematic
4A 12 P - 1AH - 12R5 LF
Model (4A = Surface Mount) Number of Pins Physical Configuration Electrical Configuration 1AH = Custom Resistance Code 12R5 = 12.5 Ohms Lead Free Option Blank = Standard Product LF = Lead Free / RoHS Compliant Product
1 F1 R1A R2A 3 R3B R4B SUB B F3 R3A 24 22 19 18 R4A 15 13 F4
R1B
6
7
R2B
10
12 F2 SUB A
NOTES: R1A + R1B + F1 = 12.5 OHMS 5 %. R2A + R2B + F2 = 12.5 OHMS 5 %. RATIO MATCH: R1 / R2 = 1 2.5 %. CO-PLANARITY = 0.004 INCHES.
R3A + R3B = 12.5 OHMS 5 %. R4A + R4B = 12.5 OHMS 5 %. RATIO MATCH: R3 / R4 = 1 2.5 %.
Circuit Protection Division
Asia-Pacific: TEL +886- (0)2 25624117 * FAX +886- (0)2 25624116 Europe: TEL +41-41 7685555 * FAX +41-41 7685510 The Americas: TEL +1-951 781-5500 * FAX +1-951 781-5700
www.bourns.com
Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications.
4A12P-1AH-12R5 - Surge Line Protection Module
Telcordia GR-1080-CORE Protection Coordination Protection coordination (Telcordia Technologies Generic Requirements, GR-1089-CORE, Issue 3, October 2002, section 4.6.7.1 protection coordination, page 4-15) is a new test for GR-1089-CORE issue 3 that will be a requirement on January 1, 2006. The equipment using the 4A12P-1AH-12R5 overcurrent line feed resistor (LFR) must be used with either a solid state primary or a primary GDT (5-pin gas discharge tube) such as the Bourns(R) 2024-31-MSP Protector. The equipment communication lines will initially be tested at the specified primary voltage protector type using a 10/1000 s generator. A solid state primary will start testing at 400 V where a GDT primary will start at 600 V. If condition A or B defined below is not achieved, the 10/1000 generator voltage, VG is increased (in steps of 200 V or interpolated value) to a maximum of 2000 V or until one of the two following criteria is achieved: A. The communication lines are stressed to 600 V peak (VP) across the equipment terminals with the GDT specified as a primary. VP specification is reduced to 400 A for a solid state primary. Note:Series resistance of the primary protector such as a heat coil resistance is connected between the generator and equipment. This resistance will be effectively added to RSERIES value when calculating the generator open circuit test voltage. B. The peak current (IPP) into the equipment terminals exceeds 100 A. The coordination test requires ten repetitions per polarity. The communication lines will also be tested to metallic and longitudinal procedures to ensure conformance. The equipment fails the coordination requirement if neither A or B is achieved with a maximum generator voltage of 2000 V or the equipment is damaged and does not operate as intended. Figure 1 shows the setup and measurement points for the coordination test.
Generator IP RG VG V VP
Equipment
For example, a GDT is defined as the primary protector. The voltage, VP will be 600 V and the current through RSERIES (4A12P-1AH-12R5) will be 48 A (600/12.5). With a generator fictive resistance of 10 , the generator VG should be adjusted to 1080 V to achieve voltage coordination. The resistance of the 4A12P-1AH-12R5 ensures the equipment will voltage coordinate before 100A is achieved. Note: Tolerances of the impulse generator, LFR, measurement, etc. will provide a variation on the actual impulse generator setting.
R SERIES
Thyristor
Figure 1 -- Coordination Requirements Overvoltage Thyristor Selection The resistance tolerance of the LFR is 5 % and therefore the expected maximum current from the generator will be 51 A. To ensure reliable operation of the overvoltage protector, the thyristor should be specified to a 10/1000 s of at least 51 A.
ProSLIC(R) is a registered trademark of Silicon Laboratories. Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications.
REV. 06/06
COPYRIGHT(c) 2005, BOURNS, INC. LITHO IN U.S.A. 08/05 e/LT0507

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