Compact size Walsin WA04X820JTL chip resistor arrays with RoHS compliance and lead free tin alloy termination
Product Overview
The ASC WA04/06 series offers general-purpose chip resistor 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, trimmed by laser for precise resistance values. They are RoHS compliant and lead-free, making them suitable for a wide range of consumer electronics, EDP, and telecom applications.
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, 10 ~ 1M | 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
| Series | L (mm) | W (mm) | T (mm) | P (mm) | A (mm) | Ta (mm) | Tb (mm) | B (mm) | C (mm) | G (mm) | D (mm) | H1 (mm) | H2 (mm) |
| 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 | 0.30 0.20 | 0.20 0.10 | 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 that the resistor can dissipate depends on the operating temperature.
Mounting
Suitable for automatic placement systems on ceramic substrates and printed-circuit boards (PCBs). Electrical connection is by individual soldering condition.
Soldering Condition
Chip resistors 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.
Test and Requirements
| Item | Requirement | Test Procedure |
| DC Resistance | Within the specified tolerance | Clause 4.5 |
| Temperature Coefficient of Resistance (T.C.R) | Refer to QUICK REFERENCE DATA | Clause 4.8 |
| Short time overload (S.T.O.L) | R/R max. (2%+0.10) | Clause 4.13 |
| Resistance to soldering heat(R.S.H) | R/R max. (1%+0.05) no visible damage | Clause 4.18 |
| Solderability | good tinning (>95% covered) no visible damage | Clause 4.17 |
| Temperature cycling | R/R max. (1%+0.05) no visible damage | Clause 4.19 |
| Load life (endurance) | R/R max.(3%+0.10) For 10R | Clause 4.25 |
| Load life in Humidity | R/R max.(3%+0.10) For 10R | Clause 4.24 |
| Adhesion | No remarkable damage or removal of the terminations. | Clause 4.32 |
| Insulation Resistance | R10G | Clause 4.6 |
| Dielectric Withstand Voltage | No breakdown or flashover | Clause 4.7 |
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: 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
| Symbol | A (mm) | B (mm) | W (mm) | F (mm) | E (mm) | P1 (mm) | P0 (mm) | D (mm) | T (mm) |
| WA06X,WA06T | 3.600.20 | 2.000.20 | 4.000.10 | Max. 1.0 | |||||
| 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 | 12.000.10 | 5.500.05 | 1.750.10 | Max. 1.0 |
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.