Manufacturers
EATON BUSSMANN 121B40-B2M-HA
Description
Circuit Breaker Thermal 1Pole 40A 12VDC
121B40-B2M-HA
Part Number
121B40-B2M-HA
Price
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Manufacturer
EATON BUSSMANN
Lead Time
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Category
Circuit Protection » Circuit Breaker
Specifications
Manufacturer
Eaton Bussmann
Manufacturers Part #
121B40-B2M-HA
Sub-Category
Circuit Breakers
Factory Pack Quantity
250
Datasheet
Extracted Text
® Bussmann ® SHORTSTOP Series 120 Auto, Manual & Modified Reset Circuit Protectors SPECIFICATIONS Single Pole Thermal Type Breakers Ratings: 8A to 50A; 12 VDC; 24 VDC. Operating Temperature: –10°F (–23°C) to 150°F (65°C). Storage Temperature: –20°F (–29°C) to 200°F (93°C). Applications: Battery chargers, trucks, buses, RV’s, trolling motors, etc. Approvals: Complies with SAE Standard J553. TEMPERATURE DERATING CURVES TIME VS. PERCENT OF RATED CURRENT 600% 200% 500% 150% Terminal Options 400% 100% .69" .69" 300% (17.5) (17.5) 50% 200% .66" .56" .56" (16.8) A B (14.2) (14.2) 0% 100% -50º 0º 50º 77º 100º 150º 200º 250º 0 5 10 15 20 3040 100 200 500 TEMPERATURE IN DEGREES F. TIME IN SECONDS Two 10-32 studs: Two 10-32 studs: .66" (AUX); .56" (BAT) .56" (AUX & BAT) .69" (17.5) .99" (25.2) PLASTIC COVER Cover & Bracket Options .66" .41" C D (16.8) 1.27" (10.3) (32.3) .37" (9.4) METAL COVER 1.56" 1.24" .83" Two 10-32 studs: Two .25" Q.C. (21.1) (39.6) (31.5) .79" 1.24" .66" (AUX & BAT) (AUX & BAT) (20.1) (31.5) .83" .84" .69" .62" (21.1) (21.4) (17.5) .79" 1.56" (15.7) 1.27" (20.1) (39.6) (32.3) .56" .41" .56" .41" E .38" (9.6) O Bracket A Bracket H (10.3) (14.2) (10.3) (14.2) 1.56" (39.6) .37" (9.4) One .25" Q.C. (AUX); Double .25" Q.C. (AUX); .64" .69" One 10-32 stud (BAT) One 10-32 stud (BAT) (16.3) (17.5) .99" .84" (25.2) (21.4) O Bracket A Bracket 1.27" 1.27" .30" .83" (32.2) (32.2) (7.7) (21.1) J K .54" .41" (13.7) 1.24" .79" (10.3) 1.56" B Bracket C Bracket (20.1) (39.6) (31.5) .79" .12" (3.0) Double .25" Q.C. (AUX); Two .25" Q.C. (AUX & BAT) Reset button dia. boss (20.1) Single .25" Q.C. (BAT) Perpendicular Orientation 1.56" .06" .38" (9.6) 1.24" .62" .69" (39.6) (1.5) (31.5) (15.7) (17.5) L 1.27" .37" (9.4) .69" .69" .83" (32.3) (17.5) (21.1) (17.5) .62" (15.7) Ref. (Typ) Series 123 Two 10-32 studs w/base attached B Bracket C Bracket O Bracket w/reset (AUX & BAT) E Bracket PART NUMBERING SYSTEM Series Terminal Rating Bracket Mtg. Holes Cover* Options Hardware 12 oooooo–ooo–oo–oo 121 – Auto Reset A – Two 10-32 studs; 08 – 8 amps O – No bracket 0 – No bracket M – Metal 01 – Waterproof WA – Whiz-lock nut 12 VDC .66 (Aux), .56 (Bat) 10 – 10 amps A – Bracket 1 – .140 dia. P – Plastic (metal assembled 122 – Modified B – Two 10-32 studs; 12 – 12 amps B – Bracket 2 – .196 dia. covers only) WB – Whiz-lock 12 VDC .56 (Aux & Bat) 15 – 15 amps C – Bracket 3 – .237 dia. 02 – Splashproof nut bulk un- 123 – Manual C – Two 10-32 studs; 20 – 20 amps E – Bracket (metal only) (optional on assembled 24 VDC .66 (Aux & Bat) 25 – 25 amps (plastic only) 4 – .265 dia. metal covers - HA – Nut & lock 115 VAC ***D – Two .250 QC; 30 – 30 amps (plastic only) add 02 suffix; washer 124 – Auto (Aux & Bat) 35 – 35 amps 5 – .228 dia. std. on plastic assembled 24 VDC ***E – One .250 QC (Aux); 40 – 40 amps (plastic only) covers - omit HB – Nut & lock 125 – Modified One 10-32 stud (Bat) 50 – 50 amps 6 – .221 dia. 02 suffix.) washer bulk 24 VDC ** H – One 10-32 stud (metal only) unassembled .56 (Bat), Double KA – Keps lock nut .250 QC (Aux) assembled ***J – Single .250 QC (Bat) *Series 123 available in plastic cover only. Series KB – Keps lock Double .250 QC (Aux) 122 & 125 available in metal cover only. nut bulk ***K – Two .250 QC (Aux & Bat) **40A maximum unassembled L – Two 10-32 studs; .37 (Aux & Bat) ***30A maximum The only controlled copy of this BIF document is the electronic read-only version located on the Bussmann Network Drive. All other copies of this BIF document are by definition uncontrolled. This bulletin is intended to clearly present comprehensive product data and provide Form No. 120 ShortStop technical information that will help the end user with design applications. Bussmann reserves the right, without notice, to change design 12-16-98 Page 1 of 1 12-16-98 or construction of any products and to discontinue or limit distribution of any products. Bussmann also reserves the right to change or BIF Document: 2067 SB98107 SB98107 Rev. A update, without notice, any technical information contained in this bulletin. Once a product has been selected, it should be tested by the user in all possible applications. % 0F RATED CURRENT % 0F RATED CURRENT
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