In RF, IF and microwave circuits, one vendor is almost impossible to skip: Mini-Circuits. From broadband baluns and low-pass filters to MMIC amplifiers and double-balanced mixers, its part numbers show up constantly on communications, CATV, industrial and test-and-measurement boards. This article organizes the 50 most actively quoted parts by product family, so you can locate fast what you need for an RF chain design or a second-source BOM swap.

1. Who Is Mini-Circuits?

Mini-Circuits was founded by Harvey Kaylie in 1968 and is headquartered in New York. It is one of the world's long-established RF/IF/microwave signal processing component vendors, with design, manufacturing and sales sites in more than 30 countries, 27 product lines and over 10,000 active models covering DC to mmWave. Its parts are widely used in cellular communications, CATV/DOCSIS, industrial control, military systems and test equipment.

Two traits define its products: strong same-day stock, and part numbers that essentially encode the specification itself — a big advantage for procurement and selection work.

2. Product Families at a Glance

• RF Transformers & Baluns — 500+ models from DC to 24 GHz, covering single-ended/balanced/differential lines, DC-passing/DC-isolated configurations, and 50Ω/75Ω impedance matching, in surface-mount and coaxial packages.
• RF Filters — 3,000+ models: low-pass, high-pass, band-pass, band-stop, diplexers, in ceramic/LTCC/cavity/suspended-substrate technologies, plus patented reflectionless filters.
• MMIC Amplifiers — HBT process, spanning low-noise, high-dynamic-range and wideband gain blocks up to 50 GHz, available in surface-mount modules and bare die.
• Mixers — double-balanced and I/Q mixers, both passive and active.
• Supporting blocks — splitter/combiners, couplers, switches, multipliers and voltage-variable attenuators.

3. This Week's 50 Hot Models, by Family

3.1 Low-Pass Filters — LFCN series (18 parts)

LFCN stands for ceramic low-pass filter, and the digits in the part number are the cutoff frequency in MHz. For example, LFCN-120 is a DC-to-120 MHz ceramic low-pass filter in an FV1206 case, handling about 8.5 W over −55°C to +100°C. The hot set, ordered by cutoff:

LFCN-80+, LFCN-105+, LFCN-120+, LFCN-225+, LFCN-320+, LFCN-400+, LFCN-490+, LFCN-630+, LFCN-900+, LFCN-1000+, LFCN-1200+, LFCN-1700+, LFCN-1800+, LFCN-2250+, LFCN-2500+, LFCN-3000+, LFCN-3800+, LFCN-6000+.

3.2 High-Pass Filter — HFCN series (1 part)

HFCN-880+: a ceramic high-pass filter that passes energy above 880 MHz, typically paired with a low-pass for diplexing or for suppressing low-frequency out-of-band interference.

3.3 Amplifiers (11 parts)

• ERA series (GaAs MMIC surface-mount amplifiers): ERA-1SM+, ERA-2SM+, ERA-3SM+, ERA-5SM+ — low-cost general-purpose wideband gain blocks; the "SM" suffix denotes surface-mount packaging.
• GALI/GVA/PGA series (50Ω amplifiers): GALI-84+, GVA-63+, PGA-103+, PGA-105+.
• PMA/PHA/PSA series: PMA3-83LN+ (low-noise amplifier), PHA-1+, PSA4-5043+.

These parts share built-in 50Ω matching and can be cascaded without external matching networks — convenient for IF amplification, receiver front ends and test chains.

3.4 RF Transformers, Baluns & Splitter/Combiners (17 parts)

• TC series (wirewound/LTCC broadband transformers): TC1-1-13M+, TC1-1T+, TC2-1T+, TC4-1W+, TCM1-63AX+, TCM1-83X+, TCBT-14, TCCH-80, SBTC-2-10L+ — used for single-ended-to-differential conversion, impedance matching and balanced driving.
• ADT/ADP series (wideband baluns/transformers): ADT1-1WT+, ADT2-1T-1P+, ADP-2-1W+, ADP-2-1+, ADP-2-20+.
• AD3/AD4/SCA (multi-way splitters): AD3PS-1+ (3-way splitter), AD4PS-1+ (4-way splitter), SCA-4-10+.

3.5 Mixers (2 parts)

ADE-42MH+: an active double-balanced mixer. CLM-83-2W+: a mixer module for up- and down-conversion.

3.6 RF Switch (1 part)

GP2S1+: a surface-mount SPDT switch, used for transmit/receive switching or band selection.

4. Part-Number Cheat Sheet

• Trailing "+": the current lead-free/RoHS version of Mini-Circuits parts; when replacing older parts without "+", check that electrical specs are identical but the finish/plating differs.
• Digits = key frequency: LFCN-3800 means 3800 MHz cutoff; HFCN-880 means 880 MHz start frequency.
• Prefix = category: LFCN = ceramic low-pass, HFCN = ceramic high-pass, ERA/GALI/GVA/PGA = amplifiers, TC/ADT/ADP = transformers/baluns, ADE/CLM = mixers, GP = switches, ADxPS = splitters.
• Package suffixes: SM = surface mount, M = miniature, W = wide-pitch versions.

5. Selection Advice

For a receiver front end, pair an HFCN high-pass with an ERA/GALI gain block. On the transmit branch, pick an LFCN by cutoff to suppress harmonics. For differential ADC/DAC driving, an ADT/ADP balun is the quickest route. For multi-way combining, use AD3PS/AD4PS directly. For up/down conversion, use ADE/CLM mixers. The strength of these parts is mature specifications, abundant reference designs and easy stock; when substituting, verify the case style (e.g., FV1206) and power handling first, then the frequency range.

6. Summary

Mini-Circuits is a general-purpose vendor for RF passives and MMIC actives. The LFCN filters, ERA/GALI amplifiers, TC/ADT baluns and ADE/CLM mixers are the highest-repeat-buy parts on communications and industrial RF boards. All 50 hot models listed above are available with genuine stock, full-reel pricing and alternate-part verification at ICGOODFIND (#ICGOODFIND) — send the part number to confirm inventory quickly.