Product Overview
The ASC_WA04/06 series offers general-purpose chip resistor arrays in various configurations, including convex and concave types. These compact and lightweight components are designed for reduced equipment size, lower assembly costs, and enhanced reliability. They are RoHS compliant and lead-free, making them suitable for a wide range of consumer electronics, EDP, and telecommunication applications. The resistors are constructed with a high-grade ceramic body and a resistive paste trimmed by laser for precise resistance values. The end terminations are tin-plated for ease of soldering.
Product Attributes
- Brand: ASC
- Certifications: RoHS compliant, Lead free
- Material: High grade ceramic body (aluminum oxide)
- Color: Not specified
- Origin: Not specified
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 | 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 | - | 0.30 0.20 | 0.40 0.20 | 0.30 0.10 |
| 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.
Derating
The power dissipation capability of the resistor depends on the operating temperature, as illustrated in Fig. 3 (Maximum dissipation in percentage of rated power as a function of the ambient temperature).
Mounting and Soldering
These Surface Mountable Resistors are suitable for automatic placement systems due to their shape and tolerances. They can be mounted on ceramic substrates and PCBs. Electrical connection is via 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, with a no-leaching condition at 260C for 30 seconds. Typical soldering profiles are provided in Fig. 4.
Test and Requirements (JIS C 5201-1 : 1998)
| Requirement | Test Procedure | Specification |
| Resistor Jumper DC resistance | DC resistance values measured at specified test voltages. | Within the specified tolerance; < 50m |
| Temperature Coefficient of Resistance (T.C.R) | Natural resistance change per change in degree centigrade. | Refer to QUICK REFERENCE DATA; N/a |
| Short time overload (S.T.O.L) | Permanent resistance change after a 5-second application of a voltage 2.5 times RCWV or the maximum overload voltage specified, whichever is less. | R/R max. (2%+0.10); < 50m |
| Resistance to soldering heat(R.S.H) | Un-mounted chips completely immersed for 101 seconds in a SAC solder bath at 2605. | R/R max. (1%+0.05); no visible damage; < 50m |
| Solderability | Un-mounted chips completely immersed for 20.5 seconds in a SAC solder bath at 2355. | Good tinning (>95% covered); no visible damage |
| Temperature cycling | 30 minutes at -55C3C, 2~3 minutes at 20C+5C-1C, 30 minutes at +155C3C, 2~3 minutes at 20C+5C-1C, total 5 continuous cycles. | R/R max. (1%+0.05); no visible damage; < 50m |
| Load life (endurance) | 1000 +48/-0 hours, loaded with RCWV or Vmax in chamber controller 702C, 1.5 hours on and 0.5 hours off. | R/R max.(3%+0.10) For 10R<1M ; R/R max.(5%+0.10) For R<10, R1M; < 50m |
| Load life in Humidity | 1000 +48/-0 hours, loaded with RCWV or Vmax in humidity chamber controller at 40C2C and 90~95% relative humidity, 1.5 hours on and 0.5 hours off. | R/R max.(3%+0.10) For 10R<1M ; R/R max.(5%+0.10) For R<10, R1M; < 50m |
| Adhesion | Pressurizing force: 5N, Test time: 101sec. | No remarkable damage or removal of the terminations. |
| Insulation Resistance | Apply the maximum overload voltage (DC) for 1 minute. | R10G |
| Dielectric Withstand Voltage | Apply the maximum 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: 5% E24: 2 significant digits followed by no. of zeros and a blank (e.g., 4.7 =4R7_, 10 =100_, 220 =221_, Jumper =000_); 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: 1. Reeled tape packaging: 8mm width paper taping, 5000pcs per reel. 2. Bulk packaging: 5000pcs per polybag.
WA06W: 1. Reeled tape packaging: 12mm width paper taping, 5000pcs per reel. 2. Bulk packaging: 5000pcs per polybag.
WA04X, WA04Y: 1. Reeled tape packaging: 8mm width paper taping, 10,000pcs per 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 | - | Max. 0.6 | - | - |
| WA06W | 2.0 | 0.0 | 12.000.10 | 5.500.05 | 1.750.10 | - | - | 20.4 | 12.0 |
2410121521_Walsin-WA04X103JTL_C168183.pdf
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