| Holder Style | Tolerance | Stability | Temperature | Mode of Operation | Load Capacity | Options | Frequency | |||||||
| HC49/U or HC18 | BC1 | 05PPM | H | 05PPM | H | 0+70C | A | Fundamental | 1 | Series | SR | Ground Wire | A | Actual Value |
| HC49/U2 | BC2 | 10PPM | A | 10PPM | A | -10+60C | B | 3rd Overtone | 3 | Parallel (pF) | Actual Value | Vinyl Sleeve | B | |
| HC50/U or HC25 | BC5 | 15PPM | B | 15PPM | B | -20+50C | C | 5th Overtone | 5 | Base Insulator | C | |||
| HC50/U2 | BC6 | 20PPM | C | 20PPM | C | -20+70C | D Standard | 7th Overtone | 7 | Metal Clip | D | |||
| HC32/U | BC7 | 25PPM | D | 25PPM | D | -25+85C | E | Special Pullability | F See Spec | |||||
| HC45/U or UM-1 | BC9 | 30PPM | E Standard | 30PPM | E | -60+60C | F | Gull Wing | G | |||||
| HC45/U2 | BC10 | 50PPM | F | 50PPM | F Standard | -30+85C | G | SMD BASE | H | |||||
| HC51/U or HC33 | BC11 | 100PPM | G | 100PPM | G | -40+70C | H | Lantek 3rd Lead | I | |||||
| HC48/U or HC6 | BC12 | 150PPM | I | -40+85C | I | 1" Leads | J | |||||||
| HC49/S (2.5mm) | BC13 | -55+105C | J | 90* Bent Leads | K | |||||||||
| HC49/S | BC14 3.5x11.05x4.65 | -30+65C | K | Slot Mount | L | |||||||||
| HC49S/SMD | BC15 3.5x11.05x4.65 | 0+85C | L | Slim Line | S | |||||||||
| HC49/S (3.3mm) | BC16 | -40+125C | M | .175mm Leads | T | |||||||||
| HC49S/SMD (3.0mm) | BC17 | 0+50C | N | |||||||||||
| Platform Crystal | BC18 (2 Pole) | -55+125C | O | |||||||||||
| Platform Crystal | BC19 (4 Pole) | -55+85 | P | |||||||||||
| Platform Crystal | BC20 (4 Pole/6 pad) | 0+200C | Q | |||||||||||
| UM-1 | BC21 | -55+90C | R | |||||||||||
| UM-4 | BC24 | |||||||||||||
| UM-5 | BC25 | |||||||||||||
| Ceramic 3.5X6.0 | BC26 (4 pad) | |||||||||||||
| Ceramic 3.5X6.0 | BC27 (2 pad) | |||||||||||||
| BM100S-32.768K | BC29 | |||||||||||||
| BM200S-32.768K | BC30 (8x3.8x2.54) | |||||||||||||
| BM203 | BC30 (8x3.8x2.54) | |||||||||||||
| CM309A | BC32 134x9.4 | |||||||||||||
| CM309B | BC33 | |||||||||||||
| CM309C | BC45 | |||||||||||||
| Ceramic 3.2x5.0 | BC34 (4 pad) | |||||||||||||
| Ceramic 3.2X5.0 | BC35 (2 pad) | |||||||||||||
| MA-506 | BC36 | |||||||||||||
| Ceramic 4.1X1.4 | BC37 (2 pad) | |||||||||||||
| Ceramic 2.5x2.0 | BC38 (4 pad) | |||||||||||||
| Ceramic 3.2X2.5 | BC39 (4 pad) | |||||||||||||
| Ceramic 3.5x6.0 | BC40 (4 pad) | |||||||||||||
| Ceramic 2.5x4.0 | BC41 (4 pad) | |||||||||||||
| Ceramic 5.0x7.0 | BC42 (4 pad) | |||||||||||||
| Ceramic 5.0x7.0 | BC43 (2 pad) | |||||||||||||
| Ceramic 5.0x7.0 | BC44 (4 pad) | |||||||||||||
| CM309S 12.4x4.4x3.6mm | BC45 | |||||||||||||
| TF 3.2x1.5x9mm | BC46 (2 pad) | |||||||||||||
| TF 11.6x5.5x2mm | BC47 | |||||||||||||
| TF 3x9 | BC49 | |||||||||||||
| TF 3x10 | BC50 | |||||||||||||
| TF 2x6 | BC54 | |||||||||||||
| TF 3x8 | BC55 | |||||||||||||
| TF 1.5x5 | BC56 | |||||||||||||
| TF 5x1.9x9mm | BC 57 | |||||||||||||
| TF 7x1.5x1.4mm | BC 58 | |||||||||||||
| Plastic 10.41x4.06 | BM201-32.768K (4 pole) | |||||||||||||
| Plastic 10.41X4.06 | BM202-32.768K (2 pole) | |||||||||||||
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