Product Overview
The ASC_WA04/06 series offers general-purpose chip resistor arrays designed for reduced equipment size, lower assembly costs, and higher reliability. These RoHS compliant and lead-free products are constructed with a high-grade ceramic body and feature laser-trimmed resistive paste for precise resistance values. They are suitable for various applications including consumer electrical equipment, EDP, and telecom.
Product Attributes
- Brand: ASC
- Certifications: RoHS compliant
- Material: High grade ceramic body (aluminum oxide)
- Termination: Tin (lead free) alloy
Technical Specifications
| Series No. | Size | Resistance Tolerance | Resistance Range | TCR (ppm/C) | Max. Dissipation at Tamb=70C | Max. Operation Voltage (DC or RMS) | Max. Overload Voltage | Climatic Category |
| WA04Y(Convex) | 0402x2 (1005x2) | 5%, 1% | 3 ~ 1M, Jumper 10 ~ 1M | 10 R 1M: 300; R<10, R>1M: 400 | 1/16 W | 25V | 50V | 55/155/56 |
| WA04X(Convex) | 0402x4 (1005x4) | 5%, 1% | 3 ~ 1M Jumper 10 ~ 1M | 10 R 1M: 200; R<10, R>1M: -300~+500 | 1/16 W | 50V | 100V | 55/155/56 |
| WA06X(Convex) | 0603x4 (1608x4) | 5%, 1% | 1 ~ 10M Jumper, 10 ~ 100K | 10 R 1M: 100; R<10, R>1M: - | 1/10 W | 50V | 100V | 55/155/56 |
| WA06W(Convex) | 0602x8 (1605x8) | 5%, 1% | 10 ~ 1M, Jumper, 10 ~ 1M, Jumper | 10 R 1M: 200; R<10, R>1M: -300~+500 | 1/16 W | 50V | 100V | 55/155/56 |
| WA06T(Concave) | 0603x4 (1608x4) | 5%, 1% | 10 ~ 1M, Jumper, 10 ~ 1M, Jumper | 10 R 1M: 200; R<10, R>1M: - | 1/10 W | 50V | 100V | 55/155/56 |
Dimensions (unit : mm)
| Model | L | W | T | P | A | Ta | Tb | B | C | D | G | H1 | H2 |
| WA04Y | 1.00 0.10 | 1.00 0.10 | 0.35 0.10 | 0.65 0.10 | 0.34 0.10 | 0.20 0.15 | 0.25 0.17 | - | - | - | - | - | - |
| WA04X | 2.00 0.10 | 1.00 0.10 | 0.45 0.10 | 0.50 0.05 | 0.40 0.10 | - | - | 0.20 0.10 | 0.30 0.05 | - | 0.25 0.10 | 0.40 0.20 | 0.30 0.10 |
| WA06X | 3.20 0.10 | 1.60 0.10 | 0.50 0.10 | 0.80 0.10 | 0.60 0.10 | - | - | 0.30 0.10 | 0.40 0.10 | 0.20 0.10 | 0.30 0.20 | - | - |
| WA06W | 4.00 0.20 | 1.60 0.15 | 0.45 0.10 | 0.50 0.20 | - | - | - | 0.30 0.20 | - | 0.20 0.10 | 0.30 0.20 | 0.40 0.20 | 0.30 0.10 |
| WA06T | 3.20+0.20/-0.10 | 1.60+0.20/-0.10 | 0.60 0.10 | 0.80 0.10 | 0.60 0.15 | - | - | 0.35 0.15 | 0.50 0.15 | - | 0.50 0.15 | - | - |
Marking
3-digits marking for E24 series 1%, 5% products. For values up to 9.1 the R is used as a decimal point. For values of 10.0 or greater the first 2 digits apply to the resistance value and the third indicates the number of zeros to follow. Example: 4.7 = 4R7, 10 = 100, 100 = 101, 6800 = 682, 47000 = 473. No marking for WA04Y chip resistors array and E96 series resistance.
Functional Description
Standard values of nominal resistance are taken from the E24 series for 5% tolerance and E24/E96 series for 1% tolerance, in accordance with IEC publication 60063.
Derating
The power dissipation depends on the operating temperature. Refer to Fig.3 for maximum dissipation as a function of ambient temperature.
Mounting
Suitable for automatic placement systems on ceramic substrates and printed-circuit boards (PCBs). Electrical connection via individual soldering. End terminations ensure reliable contact.
Soldering Condition
Can be immersed in a solder bath of 260C for 10 seconds. Tested for solderability at 235C for 2 seconds. No leaching at 260C for 30 seconds. Refer to Fig 4 for typical soldering profiles.
Test and Requirements (JIS C 5201-1 : 1998)
| Item | Test Procedure | Requirement |
| DC Resistance | Clause 4.5 | Within the specified tolerance; < 50m for Jumper |
| Temperature Coefficient of Resistance (T.C.R) | Clause 4.8 | Refer to QUICK REFERENCE DATA |
| Short time overload (S.T.O.L) | Clause 4.13 | R/R max. (2%+0.10); < 50m |
| Resistance to soldering heat(R.S.H) | Clause 4.18 | R/R max. (1%+0.05); no visible damage; < 50m |
| Solderability | Clause 4.17 | good tinning (>95% covered); no visible damage |
| Temperature cycling | Clause 4.19 | R/R max. (1%+0.05); no visible damage |
| Load life (endurance) | Clause 4.25 | R/R max.(3%+0.10) for 10R<1M; R/R max.(5%+0.10) for R<10, R1M; < 50m |
| Load life in Humidity | Clause 4.24 | R/R max.(3%+0.10) for 10R<1M; R/R max.(5%+0.10) for R<10, R1M; < 50m |
| Adhesion | Clause 4.32 | No remarkable damage or removal of the terminations. |
| Insulation Resistance | Clause 4.6 | R10G |
| Dielectric Withstand Voltage | Clause 4.7 | No breakdown or flashover |
Test Condition for Jumper (0 )
| Item | WA04Y | WA04X | WA06X | WA06W | WA06T |
| Power Rating At 70C | 1/16W | 1/16W | 1/10W | 1/16W | 1/10W |
| Resistance | MAX.50m | MAX.50m | MAX.50m | MAX.50m | MAX.50m |
| Rated Current | 1A | 1A | 1A | 2A | 1A |
| Peak Current | 1.5A | 1.5A | 3A | 3A | 3A |
| Operating Temperature | -55~155C | -55~155C | -55~155C | -55~155C | -55~155C |
Catalogue Numbers
Format: WA X XXXX X X L
Size code: 06: 0603 (1608), 04: 0402(1005)
Type code: X : x 4, Convex; Y : x 2, Convex; W :x 8, Convex; T : x 4, Concave
Resistance code (5% E24): 2 significant digits followed by no. of zeros and a blank (e.g., 4.7 =4R7_, 10 =100_, 220 =221_, Jumper =000_)
Resistance code (1%, E24+E96): 3 significant digits followed by no. of zeros (e.g., 100 =1000, 37.4K =3742)
Tolerance: F: 1%, J : 5%, P : Jumper
Packaging code: T : 7 Reel taping, B : Bulk
Termination code: L = Sn base (lead free)
Packaging
WA06X, WA06T: 8mm width paper taping, 5000pcs/reel; Bulk: 5000pcs/polybag
WA06W: 12mm width paper taping, 5000pcs/reel; Bulk: 5000pcs/polybag
WA04X, WA04Y: 8mm width paper taping, 10,000pcs/reel
Paper Tape Specifications (unit :mm)
| Symbol | A | B | W | F | E | P1 | P0 | D | T |
| WA06X,WA06T | 3.600.20 | 2.000.20 | 8.000.30 | 3.500.05 | 1.750.10 | 4.000.10 | Max. 1.0 | - | - |
| WA04X | 2.200.20 | 1.200.20 | 8.000.30 | 3.500.05 | 1.750.10 | Max. 0.6 | - | - | - |
| WA04Y | 1.150.10 | 1.150.10 | 8.000.30 | 3.500.05 | 1.750.10 | - | - | - | - |
| WA06W | 2.0 0.0 20 .4 + | 12 .0 0.0 80 .1 + | 12.000.10 | 5.500.05 | 1.750.10 | - | - | - | - |
