Product Overview
The ASC WA04/06 series offers general-purpose chip resistor arrays designed for reduced final equipment size and lower assembly costs. These components are RoHS compliant and lead-free, providing high component and equipment reliability. They are constructed with a high-grade ceramic body and feature internal metal electrodes connected by a resistive paste, precisely trimmed by laser. The resistive layer is protected by a coating, and the end terminations are tin-plated for ease of soldering. Available in convex and concave types, these resistors are suitable for a wide range of consumer electronics, EDP, and telecom applications.
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) | 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 | 200 | 1/16 W | 50V | 100V | 55/155/56 |
| WA06X (Convex) | 0603x4 (1608x4) | 5%, 1% | 1 ~ 10M Jumper, 10 ~ 100K | 200; -300~+500 | 1/10 W | 50V | 100V | 55/155/56 |
| WA06W (Convex) | 0602x8 (1605x8) | 5%, 1% | 10 ~ 1M Jumper, 10 ~ 1M | 100 | 1/16 W | 50V | 100V | 55/155/56 |
| WA06T (Concave) | 0603x4 (1608x4) | 5%, 1% | 10 ~ 1M, Jumper | 200; -300~+500 | 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 | 0.20 0.10 | 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 | 0.30 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. Each resistor is marked with a three digits code on the protective coating to designate the nominal resistance value. 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 indicate the number of zeros to follow. Example: RESISTANCE 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 resistors with a tolerance of 5% and from the E24/E96 series for resistors with a tolerance of 1%, in accordance with IEC publication 60063. The power that the resistor can dissipate depends on the operating temperature; see Fig.3 for derating curves.
Mounting and Soldering
Surface Mountable Resistors are suitable for automatic placement systems due to their rectangular shapes and small tolerances. They can be mounted on ceramic substrates and printed-circuit boards (PCBs). Electrical connection is by individual soldering. The end terminations guarantee a reliable contact. The robust construction allows immersion in a solder bath of 260C for 10 seconds. Typical soldering processes are shown in Fig 4. Surface Mount Resistors are tested for solderability at 235C for 2 seconds. The test condition for no leaching is 260C for 30 seconds.
Test and Requirements
| Item | Requirement | Test Procedure |
| Resistor Jumper DC resistance | Within the specified tolerance; < 50m | Clause 4.5; DC resistance values measured at specified test voltages. |
| Temperature Coefficient of Resistance (T.C.R) | Refer to QUICK REFERENCE DATA | Clause 4.8; Natural resistance change per change in degree centigrade. |
| Short time overload (S.T.O.L) | R/R max. (2%+0.10); < 50m | Clause 4.13; Permanent resistance change after a 5second application of a voltage 2.5 times RCWV or the maximum overload voltage specified, whichever is less. |
| Resistance to soldering heat(R.S.H) | R/R max. (1%+0.05); no visible damage; < 50m | Clause 4.18; Un-mounted chips completely immersed for 101second in a SAC solder bath at 2605C. |
| Solderability | good tinning (>95% covered); no visible damage | Clause 4.17; Un-mounted chips completely immersed for 20.5 second in a SAC solder bath at 2355. |
| Temperature cycling | R/R max. (1%+0.05); no visible damage | Clause 4.19; 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. |
| Load life (endurance) | R/R max.(3%+0.10) For 10R<1M ; R/R max.(5%+0.10) For R<10, R1M; < 50m | Clause 4.25; 1000 +48/-0 hours, loaded with RCWV or Vmax in chamber controller 702C, 1.5 hours on and 0.5 hours off. |
| Load life in Humidity | R/R max.(3%+0.10) For 10R<1M ; R/R max.(5%+0.10) For R<10, R1M; < 50m | Clause 4.24; 1000 +48/-0 hours, loaded with RCWV or Vmax in humidity chamber controller at 40C2C and 90~95% relative humidity, 1.5hours on and 0.5 hours off. |
| Adhesion | No remarkable damage or removal of the terminations. | Clause 4.32; Pressurizing force: 5N, Test time: 101sec. |
| Insulation Resistance | R10G | Clause 4.6; Apply the maximum overload voltage (DC) for 1minute. |
| Dielectric Withstand Voltage | No breakdown or flashover | Clause 4.7; Apply the maximum overload voltage (AC) for 1 minute. |
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)
Reeled tape packaging: WA06X, WA06T: 8mm width paper taping, 5000pcs per reel. WA06W: 12mm width paper taping, 5000pcs per reel. WA04X, WA04Y: 8mm width paper taping, 10,000pcs per reel.
Bulk packaging: WA06X, WA06T, WA06W: 5000pcs per polybag. WA04X, WA04Y: Not specified.
2410121521_Walsin-WA04X332JTL_C171902.pdf
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