NTE Replacement Semiconductors, Amperite Thermal Delay Relays, Weller Soldering & CRC / Chemtronics MRO
One of New England's last true industrial electronics counters—stocking board-level replacement semiconductors, octal thermal delay relays, precision soldering irons, and industrial contact cleaners.
Board-Level Repair Parts & Industrial MRO Chemicals Without Minimum Order Delays
When a $4 bridge rectifier, MOV surge varistor, or octal time-delay relay fails on a legacy machine tool drive board or commercial boiler flame-safeguard panel, OEM machinery builders often quote $3,500+ for an obsolete circuit board with a 4-week lead time.
At 149 Congress Street in Lowell, Frank P. McCartin Co., Inc. keeps industrial maintenance technicians running with NTE universal cross-reference semiconductors, Amperite thermal delay relays, Crouzet multi-function timers, Weller soldering irons and tips, and CRC / Chemtronics electrical maintenance chemicals.
Need Immediate Part Verification?
Bring your sample component or email a clear nameplate photo to our 149 Congress Street counter team for same-day pickup or regional truck delivery.
Semiconductor, Relay & Board-Level Component Cross-Reference Matrix
Bring your part number (1N, 2N, ECG, SK, or OEM house number) to our counter for an instant NTE cross-reference.
| Component Class | Primary Brands | Stocked Package / Pin Types | Typical Industrial Repair Application |
|---|---|---|---|
| Power Rectifiers, Bridges & SCRs | NTE Electronics | DO-4/DO-5 Stud Diodes, 25A–50A Square Bridge Rectifiers, TO-220 / TO-247 SCRs & Triacs | DC motor drive armature bridges, battery chargers, welder rectifiers & solid-state heater controls |
| Transistors, ICs & Optocouplers | NTE Electronics | TO-3 Steel Cans, TO-220, TO-92, 8/14/16-Pin DIP Operational Amplifiers, Logic ICs & Opto-Isolators | Repairing legacy CNC servo cards, linear power supplies, elevator logic boards & PLC I/O modules |
| Thermal & Solid-State Time-Delay Relays | Amperite, Crouzet | 8-Pin Octal, 9-Pin Miniature Glass/Metal Thermal Delay (2 sec to 180 sec) & DIN-Rail Multi-Timers | Commercial boiler purge/pre-ignition delay, compressor staging, tube amplifier warm-up & conveyor delays |
| Capacitors, Resistors & MOVs | NTE, Mallory, Clarostat, Mars | Electrolytic Axial/Radial Caps, Wirewound Power Resistors, Clarostat Potentiometers & Metal Oxide Varistors | Power supply recapping, VFD speed-pot replacements (2kΩ / 5kΩ / 10kΩ linear) & lightning surge protection |
| Panel Indicator Lamps & Fuseholders | Sylvania Miniature, Littelfuse, Bussmann | BA9s Bayonet, E10 Screw, T-3-1/4 (#44, #47, #755, #1819, 24MB, 120MB) & 3AG / Midget Panel Holders | Pushbutton illuminated lenses, annunciator panels & control board glass/ceramic fuse clips |
Weller Soldering, Bench Tools & CRC / Chemtronics MRO Chemical Guide
Professional bench and field service supplies stocked in Lowell.
| Category | OEM Lines | Featured Products | Field & Bench Use Case |
|---|---|---|---|
| Soldering Stations, Guns & Irons | Weller (Apex Tool), Kester Solder | WES51/WE1010 Stations, D550 Heavy-Duty Soldering Guns, PTA7/ETA Replacement Tips, 60/40 & Lead-Free Rosin Solder | Circuit board rework, heavy stator/commutator lug soldering & field wiring harness repairs |
| Desoldering & Diagnostic Sprays | Chemtronics, GC Electronics | Soder-Wick® Rosin Desoldering Braid, CircuitWorks® Flux Pens, Frost-Off / Freeze-It Thermal Fault Finder | Wicking solder from through-hole PCBs and thermally shocking intermittent semiconductors to isolate board faults |
| Electrical Cleaners & Lubricants | CRC Industries, Chemtronics | QD® Electronic Cleaner (Plastic-Safe), Lectra-Motive®, 2-26® Moisture Displacer, Wasp & Hornet Spray | Cleaning oxidized relay contacts, potentiometers, switchgear busbars, and outdoor utility enclosures |
| Industrial Epoxies & Workholding | Devcon, Panavise, Dymo | Devcon 5-Minute / Plastic Steel Epoxy, Panavise 301/350 PCB Holders, Dymo Rhino Industrial Label Tape | Potting sensor housings, clamping circuit boards during rework & OSHA/NEC panel arc-flash/circuit labeling |
Counter Checklist for Relay, Semiconductor & Control Board Repairs
- For Amperite Time-Delay Relays: Read the exact stamping on the metal/glass barrel or octal base (e.g., `115N030` = 115V heater, Normally Open contacts, 30-second delay; `24C010` = 24V heater, Normally Closed, 10-second delay).
- For Potentiometers (Speed Pots): Measure resistance end-to-end with an ohmmeter (e.g., 1kΩ, 5kΩ, 10kΩ), verify Linear ('B') vs. Audio ('A') taper, wattage (2W wirewound vs. 0.5W carbon), and shaft diameter (1/4" vs. 1/8").
- For NTE Cross-References: Bring the failed component even if the part number is partially worn—our counter reference library can often identify the package pinout and circuit function.
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Counter Q&A: NTE Semiconductors, Amperite Relays & Weller MRO
How do I decode an Amperite thermal time-delay relay part number like 115N060T?
In Amperite's numbering system, the first digits ('115') indicate the heater voltage (115V AC/DC), the middle letter ('N' for Normally Open or 'C' for Normally Closed) indicates contact state before heater warm-up, the last digits ('060') specify the delay time in seconds (60 seconds), and a 'T' suffix denotes an 8-pin octal base rather than a 9-pin miniature base.
Can you cross-reference older RCA SK or Sylvania ECG semiconductor numbers?
Yes! Most legacy ECG (Philips/Sylvania) and SK (RCA/Thomson) replacement numbers map directly to NTE Electronics part numbers (often with the exact same numeric suffix), and our Lowell counter can look up any OEM Japanese (2SA/2SB/2SC/2SD), European (BC/BD/BF), or JEDEC (1N/2N/3N) device.
What is the difference between CRC QD Electronic Cleaner and heavy-duty degreaser like CRC Lectra-Motive?
CRC QD® Electronic Cleaner is formulated with a rapid-evaporating, zero-residue solvent that is safe on delicate ABS/polycarbonate plastics, circuit boards, and relay housings. CRC Lectra-Motive® (or Brakleen) is a heavy-duty chlorinated/non-chlorinated solvent for degreasing metal motor frames and starter linkages that will melt or craze sensitive plastics.
Request a Counter Quote or Cross-Reference: NTE Semiconductors, Amperite Relays & Weller MRO
Routed directly to our 149 Congress Street, Lowell specialists. Eligible for COMMBUYS FAC124 (#201354) and MHEC G14 (#374) / G19 (#419) purchasing.