# Bridge rectifier A single-phase bridge rectifier in one of Vishay's through-hole cases, built from Vishay's package drawings. - **In-line cases (GBL, GBU, KBL, KBU).** The body stands on the board with its four leads in a row along X, 5.08 apart and centred on the origin. The leads' centre line is at y = 0 and the face with the polarity marks faces -Y. From -X the leads are + ~ ~ - on GBL and KBL, and - ~ ~ + on GBU and KBU, as each sheet's front view draws them. The + lead is at the end with the chamfered top corner. GBL and GBU stand on the leads' shoulders. KBL and KBU stand on feet at both ends of the body. GBU and KBU have a mounting slot through the body. - **Square cases (KBPC1, KBPC6).** The body sits on the board, centred on the origin, with a mounting hole through its centre. The four round leads are at the corners of a square: + at -X +Y beside the chamfered corner, ~ at +X +Y and -X -Y, and - at +X -Y. The board is the XY plane, and the leads go down through it. | Case | Body length x thickness | Height above the board | Leads | Lead length | Sheet | |---|---|---|---|---|---| | GBL | 0.815–0.825 x 0.128–0.140 in (20.7–20.9 x 3.25–3.56) | body 0.411–0.421 (10.4–10.7) on shoulders 0.060–0.080 (1.50–2.03) | flat 0.040–0.050 x 0.018–0.022 (1.02–1.27 x 0.46–0.56), shoulders 0.080–0.095 (2.03–2.41) wide | 0.682–0.718 (17.3–18.2) below the body | GBL005 | | GBU | 0.860–0.880 x 0.130–0.140 (21.8–22.3 x 3.30–3.56) | body 0.720–0.740 (18.3–18.8) on shoulders 0.060–0.080 (1.52–2.03) | flat 0.040–0.050 x 0.020–0.026 (1.02–1.27 x 0.51–0.66), shoulders 0.085–0.100 (2.16–2.54) outer, 0.065–0.080 (1.65–2.03) inner | 0.690–0.710 (17.5–18.0) below the body | GBU4A | | KBL | 0.726–0.768 x 0.236–0.256 (18.5–19.5 x 6.0–6.5) | 0.600–0.640 (15.2–16.3) overall, 0.567–0.591 (14.4–15.0) to the body's underside | round Ø 0.048–0.052 (1.2–1.3) | + 1.1 (27.9) min below the feet, the others 1.0 (25.4) min below the body | KBL005 | | KBU | 0.895–0.935 x 0.260–0.280 (22.7–23.7 x 6.6–7.1) | 0.760 (19.3) max overall, 0.660–0.700 (16.8–17.8) to the body's underside | round Ø 0.048–0.052 (1.2–1.3) | 1.0 (25.4) min below the feet, + 0.200–0.240 (5.08–6.09) longer | KBU4A | | KBPC1 | 15.7–16.7 square | 5.5–6.5 | round Ø 0.7–0.9, 10–11 apart | 22 min | D-72 | | KBPC6 | 14.75–15.75 square | 4.33–5.33 | round Ø 0.90–1.10, 10.0–10.8 apart | 25.4 min | D-72 | More, from the same drawings. The lead pitch is 0.190–0.210 (4.8–5.3) on every in-line case. GBL's leads are 0.030–0.040 (0.76–1.02) behind the front face, GBU's 0.075–0.085 (1.90–2.16), KBL's 0.077–0.091 (1.95–2.30), and KBU's 0.185–0.205 (4.7–5.2) in front of the back face. The chamfer at the + end is 0.125 (3.17) x 45° on GBL and GBU, and 0.165–0.185 (4.2–4.7) on KBU. GBU's mounting slot is 0.140–0.160 (3.5–4.1) wide, with its end centres 0.065–0.085 (1.65–2.16) apart, the upper one 0.290–0.310 (7.4–7.9) below the top. KBU's slot has the same width and spacing, with its lower centre 0.405–0.455 (10.3–11.3) above the bottom of the feet. The KBPC1 hole is Ø 3.8–4.2 and the KBPC6 hole Ø 3.60–4.00. The part uses the middle of each range, taken in inches where the sheet is in inches, so the pitch is 0.200 in, 5.08. Where the sheet gives only a minimum or a maximum (KBL's and KBU's lead lengths, KBU's overall height, the KBPC lead lengths), it uses that value. ## Source Vishay data sheets and outline drawings, from vishay.com except the KBL sheet: - Vishay General Semiconductor, **GBL005, GBL01, GBL02, GBL04, GBL06, GBL08, GBL10**, document 89300, revision 22-Aug-2023, page 3, "PACKAGE OUTLINE DIMENSIONS in inches (millimeters): Case Type GBL". The sheet is marked end of life, with GBL...E parts as the alternative. - Vishay General Semiconductor, **GBU4A thru GBU4M**, document 88614, revision 13-Jul-2020, page 3, "Case Type GBU". - Vishay General Semiconductor, **KBL005 thru KBL10**, document 88655, revision 07-Jun-06, page 3, "Case Style KBL". vishay.com no longer serves document 88655, so this is the copy hosted by static.datasheets.com (). - Vishay General Semiconductor, **KBU4A thru KBU4M**, document 98731, revision 24-Jan-2025, page 3, "Case Style KBU". - Vishay Semiconductors, **D-72** outline dimensions, document 95250, revision 06-Feb-2024, "DIMENSIONS in millimeters (inches): KBPC6, KBPC8" and "KBPC1". The VS-KBPC1 and KBPC6 series sheet, document 93585, revision 18-May-2018, refers to it. Each sheet says "Polarity shown on front side of case, positive lead by beveled corner". **Proportions, for looks only.** The drawings show these but don't dimension them: - KBL's top-corner chamfer and the KBPC's chamfered + corner are 0.12 x the body's length or side. - KBL's and KBU's feet are 0.06 x the body's length wide at each end. They run the body's full thickness. - The slots are centred along the body's length, as drawn. - Not modelled: GBU's 0.020 in corner radii and its 9° and 5° drafts, the KBPC's top rim, the leads' pointed or rounded tips, and the polarity marks. - Materials are for looks and a rough mass. The body is epoxy moulding compound, mostly silica filler (density about 1.9 to 2.0), and ptfe (2.2) is the nearest in the material list. The leads are tin-plated copper, so copper. ## Catalogue models The catalogue's `Diode_Bridge_Vishay_` models name a Vishay case, and six of them map: GBL, GBU, KBL, KBU, KBPC1 and KBPC6. Measured on the reference models: | Model | Measured | Vishay's drawing | |---|---|---| | GBL | body 20.9 x 3.56, 10.6 high on shoulders 2.0 high and 2.4 wide; leads 1.27 x 0.50 at 5.08, 1.02 behind the front | 20.7–20.9 x 3.25–3.56, 10.4–10.7, 1.50–2.03, 2.03–2.41; 1.02–1.27 x 0.46–0.56, 0.76–1.02 | | GBU | body 22.1 x 3.4, 18.5 high on shoulders 1.9 high, 2.0 wide inner and 2.5 outer; leads 1.0 x 0.5 at 5.08 | 21.8–22.3 x 3.30–3.56, 18.3–18.8, 1.52–2.03, 1.65–2.03 and 2.16–2.54; 1.02–1.27 x 0.51–0.66 | | KBL | body 19.5 x 6.5, 15.05 high overall on feet about 1.0 high; leads 1.3 square at 5.08, 2.3 behind the front | 18.5–19.5 x 6.0–6.5, 15.2–16.3; Ø 1.2–1.3, 1.95–2.30 | | KBU | body 23.2 x 7.1, 19.35 high overall on feet about 1.5 high; leads 1.1 square at 5.08, 5.2 from the back | 22.7–23.7 x 6.6–7.1, 19.3 max; Ø 1.2–1.3, 4.7–5.2 | | KBPC1 | body 16.2 square, 6.4 high; leads Ø 0.9, 10.5 apart | 15.7–16.7, 5.5–6.5; Ø 0.7–0.9, 10–11 | | KBPC6 | body 15.25 square, 6.4 high; leads Ø 1.1, 10.4 apart | 14.75–15.75, 4.33–5.33; Ø 0.90–1.10, 10.0–10.8 | GBL, GBU and KBPC1 are within Vishay's drawings. Three models are not: - The KBL model is 15.05 high, 0.15 under the drawing's 15.2 minimum. - The KBU model is 19.35 high, 0.05 over the 19.3 maximum, and its leads are 1.1 square where the drawing has round leads Ø 1.2–1.3. - The KBPC6 model is 6.4 high, 1.07 over the drawing's 5.33 maximum. The names name Vishay's case, so they map to Vishay's drawing of that case, with the pitch, lead order and lead spacing as the models have them. `Diode_Bridge_Vishay_KBPM` is left as "no table read yet": Vishay's KBPM sheets (KBP005M and 3KBP005M, documents 88888 and 89308) are no longer on vishay.com. The other bridge rectifier models in the family name no maker, or another maker, and keep axial-diode's reason.