Product Overview
The ASC WA04/06 series offers general-purpose chip resistor arrays designed for surface mounting. These resistors are constructed with a high-grade ceramic body and feature a resistive paste trimmed by laser for precise resistance values. They are available in convex and concave types, in various sizes including 0402x2, 0402x4, 0603x4, and 0602x8 configurations. Key advantages include small size, light weight, reduced equipment size, lower assembly costs, and higher reliability. These RoHS compliant and lead-free products are suitable for a wide range of consumer electronics, EDP, computer applications, and telecommunications.
Product Attributes
- Brand: ASC
- Certifications: RoHS compliant, lead free products
- Material: High grade ceramic body (aluminum oxide)
- Color: Not specified
- Origin: Not specified
Technical Specifications
| Series No. | Size | Resistance Tolerance | Resistance Range | TCR (ppm/C) (10 R 1M) | 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 | 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 | 200 (R<10, R>1M: 200) | 1/16 W | 50V | 100V | 55/155/56 |
| WA06X (Convex) | 0603x4 (1608x4) | 5%, 1% | 1 ~ 10M Jumper, 10 ~ 100K | -300~+500 (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 | 200 | 1/16 W | 50V | 100V | 55/155/56 |
| WA06T (Concave) | 0603x4 (1608x4) | 5%, 1% | 10 ~ 1M, Jumper | -300~+500 (10 R 1M), 200 (R<10, R>1M) | 1/10 W | 50V | 100V | 55/155/56 |
Dimensions (unit : mm)
| Series | 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 | - | - |
| 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 | - | 0.30 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 is dependent on operating temperature, refer to Fig. 3 in the source document.
Mounting and Soldering
These Surface Mountable Resistors are suitable for automatic placement systems on ceramic substrates and printed-circuit boards (PCBs). Electrical connection is by individual soldering. The end terminations ensure reliable contact. The robust construction allows immersion in a solder bath of 260C for 10 seconds. They are tested for solderability at 235C for 2 seconds. The test condition for no leaching is 260C for 30 seconds. Typical soldering profiles are provided in Fig. 4 of the source document.
Test and Requirements (JIS C 5201-1 : 1998)
Tests are carried out according to IEC publication 115-8, category LCT/UCT/56, and meet EIA, EIAJ, and JIS requirements. Standard atmospheric conditions apply: Temperature: 15C to 35C, Relative humidity: 45% to 75%, Air pressure: 86kPa to 106 kPa. All soldering tests use mildly activated flux.
| Requirement | Test Procedure | Criteria |
| Resistor Jumper DC resistance | Clause 4.5, measured at specified test voltages. | Within the specified tolerance, < 50m |
| Temperature Coefficient of Resistance (T.C.R) | Clause 4.8, Natural resistance change per change in degree centigrade. | Refer to QUICK REFERENCE DATA |
| Short time overload (S.T.O.L) | Clause 4.13, 5-second application of 2.5 times RCWV or max overload voltage. | R/R max. (2%+0.10), < 50m |
| Resistance to soldering heat(R.S.H) | Clause 4.18, Un-mounted chips immersed for 101 sec in SAC solder bath at 2605C. | R/R max. (1%+0.05), no visible damage, < 50m |
| Solderability | Clause 4.17, Un-mounted chips immersed for 20.5 sec in SAC solder bath at 2355. | Good tinning (>95% covered), no visible damage |
| Temperature cycling | Clause 4.19, 5 continuous cycles of -55C to +155C. | R/R max. (1%+0.05), no visible damage, < 50m |
| Load life (endurance) | Clause 4.25, 1000 hours at 702C with RCWV or Vmax. | 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, 1000 hours at 40C2C and 90~95% RH with RCWV or Vmax. | R/R max.(3%+0.10) for 10R<1M; R/R max.(5%+0.10) for R<10, R1M, < 50m |
| Adhesion | Clause 4.32, Pressurizing force: 5N, Test time: 101sec. | No remarkable damage or removal of the terminations. |
| Insulation Resistance | Clause 4.6, Apply max overload voltage (DC) for 1 minute. | R10G |
| Dielectric Withstand Voltage | Clause 4.7, Apply max overload voltage (AC) for 1 minute. | 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
The resistors have a catalogue number starting with . 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: For 5% E24: 2 significant digits followed by no. of zeros and a blank (e.g., 4.7 =4R7_, 10 =100_, 220 =221_, Jumper =000_). For 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 per reel; Bulk packaging: 5000pcs per polybag. WA06W: 12mm width paper taping, 5000pcs per reel; Bulk packaging: 5000pcs per polybag. WA04X, WA04Y: 8mm width paper taping, 10,000pcs per reel.
Paper Tape Specifications (unit :mm)
| Symbol | A | B | W | F | E |
| WA06X,WA06T | 3.600.20 | 2.000.20 | - | - | - |
| WA04X | 2.200.20 | 1.200.20 | 3.500.20 | - | - |
| WA04Y | 1.150.10 | 1.150.10 | 8.000.30 | 3.500.05 | 1.750.10 |
| WA06W | 2.0 | 0.0 | 20.4+0.0/-0.1 | 12.0+0.0/-0.1 | 12.000.10 |
| Symbol | P1 | P0 | D | T |
| WA06X,WA06T | 4.000.10 | Max. 1.0 | - | - |
| WA04X | Max. 0.6 | - | - | - |
| WA04Y | - | - | - | - |
| WA06W | 5.500.05 | 1.750.10 | - | - |
2410121521_Walsin-WA04X471JTL_C7466178.pdf
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