Metal (Oxide) Film Fuse Resistors

Transcription

1 Meta (Oxide) Fim Fuse Resistors Type: ERQH (Fame retardative hermetic type) Type: ERQC (Fameproof bath-tub type, xia eads) n Features ccurate Fusing Characteristics Fameproof construction in a ceramic tube or case Hot Spot Temperature contro The temperature of resistor surface wi not exceed ûc ( ûf) Uniform Quaity, consistent performance and reiabiity High Dieectric Withstanding Votage Resistor can withstand up to V pproved under the ISO 9 system n Construction Fame-retardant, hermeticay seaed Meta (oxide) fim ERQ-H type ead wire Spiraing turns Marking Ceramic core Ceramic tube Fusing gass Fame-proof epoxy resin End cap Seaing washer Rev./

2 n Expanation of Part Numbers 8 9 E R Q C J Product Code Meta (oxide) fim fuse resistors Power Rating at C amb. Code Power R.. W W W W W Specia Feature Code Feature Hermetic H (. W) Bath-tub C xia eads Toerance Code To. J ± % K ± % Vaue The first two digits are significant figures of resistance and the third one denotes number of zeroes foowing. Decima point is expressed by R as.= R. Suffix for Packaging and/or Cut & Formed eads Code Packaging Ni Std.buk packing V xia taped & box P P type cut & formed PáááS type cut & PáááS formed The above exampe shows a standard bath-tub type meta oxide fim fuse resistor, W power rating, resistance vaue of W, toerance of %, and package of standard buk packing. n Ratings Type Power Dieectric Maximum Standard Rating Withstanding Overoad Toerance Range (W) at C Votage (%) Vaues (W) Votage(V) min. max. ERQH. times of RCWV () C K (±)..8 E J (± ).9 k E ERQC C K (±)..8 E J (± ) k E K (±)..8 E ERQC C J (± ) k E. times of K (±)..8 E ERQC RCWV C J (± ). k E Marking Method on Body Stamp T.C.R. - /ûc (ppm/ûc) Weight (g/pcs.).. ± ERQC C J (± ). k E 8. () Rated Continuous Working Votage (RCWV) shoud be determined from RCWV=Ã Power Rating Vaue. Maximum Open Circuit Votage Referring to the maximum vaue of the votage appied between terminas of the resistor when the resistor is opened in an eectric circuit, it is defined by type and resistance. Pease stay within the specified votage. Power Derating Curve For resistors operating in ambient temperatures above ûc, power rating shoud be derated in accordance with the figure to the right. Rated oad (%) Ð C C 8 C type H type C Ð Ð Ð 8 8 mbient Temperature ( C)

3 n Expanation of marking Type H Back stamp Type C Red stamp Symbo Rated power /W WJ 8 Manufacturing number Toerance Rated power, resistance vaue and Toerance Symbo.WJ Q vaue Date code (Year,Month,Week) Code for fuse resistors Date code (Year,Month,Week) n Dimensions in mm (not to scae) Dimensions (mm) Type fd k fd Type ERQH + Ð (mm) fd ERQH. ±.. ±. 8. ±.. ±. Ñ fd ERQC. ±. Ñ. ±.. ±.. ±. ERQC 8. ±. Ñ. ±..8 ±.. ±. Type ERQC fd ERQC. ±. Ñ. ±..8 ±. 9. ±. ERQC. ±. Ñ. ±..8 ±. 9. ±. n Cut & Formed Type Type ÒPÓ S h H h fd max. f.±..8.±. Unit: mm Part No fd S H h h ERQHP. ±. f. ±.. ±.. ±..8 ±.. ±. Type ÒPáááSÓ S h H h max. fd W W Unit: mm Part No S H fd h h W W ERQCPS ( W). ±.. ±.. ±.. ±.. ±.. ±.. ±.. ±..8 ERQCPS ( W) 8. ±.. ±.. ±..8 ±.. ±..8 ±.. ±.. ±.

4 n xia Taping Specifications Type ERQH max.. max..±. + Ð. max..±. max. + Ð D/ 9± Standard quantity (per box) pcs..±. max. D + Ð ± - <. dimensions are in miimeters n Pakaging Specifications Contact factory pakaging specifications. (Type ERQC) n Performance Specifications Characteristics Specifications Test Methods Fame-Retardancy No specimens which burn with faming combustion for more than seconds after each appication of the test fame. The test fame is appied for seconds and removed for seconds. The test sha be repeated unti resistor has been subjected to appications of the test fame. Fusing Characteristics When resistors are tested using the specified circuit, the resistors sha meet the requirements specified respectivey. Tested on individua specified circuit, using stabe power suppy.

5 n Fusing Characteristics (Constant Votage Circuit) ERQH ERQC W W kw W W kw 8 8 ERQC ERQC, C W W kw C{ C{ W. k W W kw 8 8 n Hot Spot Temperature (for Reference) Temperature rise ot (K) CJ CJ8 CJR CJ8 Measuring point HJ8 8 9

6 Safety Precautions. Confirmation of fusing conditions ) Fusing characteristics differ by type and resistance vaue and it shoud be confirmed before use in fina product. ) If high votage is appied between terminas of the resistor after fusing, arcing may occur. Use them beow the maximum open circuit votage.. Consideration for waveform puse votage, inrush votage, transient votage. In the case of inrush votage circuit, transient phenomenon for such appications of a consideraby high votage in a short time, or appication of waveform puse votage with high peak votage, sufficient considerations sha be necessary depending on the actua appication circuit.. Conditions of use in steady state Resistors shoud be used with sufficient aowance under the power derating curve.. Precautions The products in this cataog are intended for use in genera standard appications for genera eectronic equipment (V products, househod eectric appiances, office equipment, information and communication equipment, etc.); ccordingy, the use in the foowing environments, or such environmenta conditions may affect the performance of the products. Do not use in the foowing environmenta conditions. In iquid such as water, oi, chemica, and organic sovent. Under direct sunight, outdoor and dusty atmospheres. In paces fu of corrosive gases such as sat water, C, HS, NH, SO, and NO. Use in environments with high static eectricity and strong eectromagnetic waves. Cose to a heating component, and where a fammabe such as a poyviny choride wire is arranged cose to the product. If seaed and coated with resin, etc. This resistor is not sovent resistant, and where the manufacturing process incudes a ceaning step using organic sovents or the ike, arrange the process so as to mount the resistor after ceaning. (Data for Reference) n Puse Characteristics (Usua) Pp (Vp) t T P P : Puse imit power (W) V P : Puse imit votage (V) t : Puse continuous time (s) T : Period (s) V R : Rated votage (V) P : Rated power (W) R : vaue (W) V p max. : Max. puse imit votage (V) Withstand puse imit power is cacuated by the next method. P P =KáPáT/t V P = Ã KáPáRáT/t Reference to the right about a fixed number of V P max. Type K V p max. (V) ERQH. ERQC. ERQC. ERQC. ERQC. T>(s) T=(s) T/t> T/t= P P <P P stands for P P (V P <V R V R stands for V P ) dded votage<v p max. P P or V P is reference vaue Conditions : Puse added time= h change=± % Room temperature

7 n Puse Characteristics (Inrush) (Test Methods) change< ± % with puse cyces as ike the figure. ) dded power and added votage are within the graph shown beow ) dded in norma temperature and humidity E. E t P=E /R E : Votage (V) R : (W) Max. dded Puse Votage H V C V C V C V C V s K dded Power (W) C C C C H Reference Time Constant (ms)