Product Overview
The ASC_WA04/06 series offers general-purpose chip resistors arrays designed for reduced equipment size and lower assembly costs. These resistors are constructed with a high-grade ceramic body and feature internal metal electrodes connected by a resistive paste, precisely trimmed by laser. They are RoHS compliant and lead-free, making them suitable for a wide range of consumer electronics, EDP, computer applications, and telecommunications. Key advantages include small size, light weight, and high component reliability.
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 | 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 | 1/16 W | 25V | 50V | 55/155/56 |
| WA04X (Convex) | 0402x4 (1005x4) | 5%, 1% | 3 ~ 1M Jumper 10 ~ 1M | 1/16 W | 50V | 100V | 55/155/56 |
| WA06X (Convex) | 0603x4 (1608x4) | 5%, 1% | 1 ~ 10M Jumper, 10 ~ 100K | 1/10 W | 50V | 100V | 55/155/56 |
| WA06W (Convex) | 0602x8 (1605x8) | 5%, 1% | 10 ~ 1M, Jumper | 1/16 W | 50V | 100V | 55/155/56 |
| WA06T (Concave) | 0603x4 (1608x4) | 5%, 1% | 10 ~ 1M, Jumper | 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. 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. Power dissipation is dependent on operating temperature, refer to Fig.3 for derating curve.
Mounting and Soldering
These Surface Mountable Resistors are suitable for automatic placement systems and can be mounted on ceramic substrates and printed-circuit boards (PCBs). They can be immersed in a solder bath of 260C for 10 seconds. Solderability is tested at 235C for 2 seconds. The test condition for no leaching is 260C for 30 seconds. Typical soldering profiles are provided in Fig 4.
Test and Requirements (JIS C 5201-1 : 1998)
| Item | Test Procedure | Requirement |
| DC Resistance | Clause 4.5 | Within the specified tolerance |
| 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) |
| Resistance to soldering heat(R.S.H) | Clause 4.18 | R/R max. (1%+0.05), no visible damage |
| 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 |
| 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 |
| 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
The resistors have a catalogue number starting with . WA X XXXX X X L where: Size code (06: 0603, 04:0402), Type code (X: x 4 Convex, Y: x 2 Convex, W:x 8 Convex, T: x 4 Concave), Resistance code (E24 for 5%, E24+E96 for 1%), Tolerance (F: 1%, J: 5%, P: Jumper), Packaging code (T: 7 Reel, B: Bulk), Termination code (L = Sn base).
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.
2410121521_Walsin-WA04X100JTL_C170185.pdf
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