Automotive Interior
Batteries, infotainment, lighting, mirrors, and interior modules where compact keyed connectors matter.
Molex 2.5mm compact Fit connectors
Molex Nano-Fit connectors for compact power and signal
Select Nano-Fit single-row or dual-row housings, 105300 and 201447 terminals, black or natural keying, TPA and CPA options, wire range, and circuit count for tight harness packaging.
2.50mm Pitch2-16 Circuits20-26 AWG250V
Why Molex Nano-Fit connectors exist
Molex Nano-Fit is the smallest Fit connector family in this guide. It uses 2.5mm pitch to put compact power and signal circuits into spaces where Micro-Fit 3.0 or Mini-Fit Jr. would consume too much room.
Single-row Nano-Fit covers 2-8 circuits with 105307 receptacles and 200277 plugs. Dual-row Nano-Fit covers 4-16 circuits with 105308 receptacles and 201444 plugs.
The terminal stack uses 105300 female terminals and 201447 male terminals. Options include 105325 TPA retainers, 217140 CPA accessories, black and natural color-keyed housings, and glow-wire variants where the exact part supports them.
Nano-Fit is useful for automotive interior electronics, batteries, infotainment, lighting, mirrors, EV chargers, appliances, HVAC, server storage, GPU trays, and compute hardware.
Why teams choose Molex Nano-Fit
Nano-Fit earns its place when packaging is the limiting factor and the current plan still fits the selected Nano-Fit terminal and wire condition.
Smallest Fit Pitch
2.5mm pitch keeps power and signal disconnects compact in crowded modules.
Color Keyed
Black and natural housing options help separate similar connectors when the selected parts use those keys.
Accessory Options
TPA, CPA, and glow-wire variants give the family more mechanical control than a simple miniature plug.
Where Molex Nano-Fit earns its place
EV Chargers And HVAC
Compact control and power branches in charger, appliance, and HVAC assemblies.
Server And Compute
GPU trays, storage, and compute modules where dense power and signal routing is valuable.
Fit family comparison
Pick the Fit family by pitch, wire range, circuit count, and the exact terminal and wire condition behind the current rating.
Nano-Fit
Compact signal and power, tight packaging
2.5mm
20-26 AWG
- Max Current*
- 8.0A with 105300 terminals and 20 AWG in a 2-circuit wire-to-board set
- Circuits
- 2-8 single / 4-16 dual
Micro-Fit 3.0
Mid-density power and signal workhorse
3.0mm
18-30 AWG
- Max Current*
- 8.5A with 43030 terminal and 18 AWG
- Circuits
- 2-12 single / 2-24 dual
Ultra-Fit
Compact 600V power with glow-wire options
3.5mm
16-22 AWG
- Max Current*
- 14A with 172253 tin terminals and 16 AWG in a 2-circuit single-row wire-to-board set
- Circuits
- 2-8 single / 4-16 dual
Mini-Fit Jr.
Classic power interconnect
4.2mm
16-28 AWG
- Max Current*
- 9A with 5556 terminal and 24-18 AWG variant; 13A with 45750 HCS terminal and 16 AWG
- Circuits
- 2-24 dual
Mega-Fit
High-current power runs
5.7mm
10-16 AWG
- Max Current*
- 23A at 600V with Mega-Fit terminals and 12 AWG; 30A peak with Mega-Fit terminals and 10 AWG in a 2-circuit wire-to-wire set
- Circuits
- 2-8 single / 2-12 dual
| Family | Pitch | Max Current* | Wire | Circuits | Use |
|---|---|---|---|---|---|
| Nano-Fit | 2.5mm | 8.0A with 105300 terminals and 20 AWG in a 2-circuit wire-to-board set | 20-26 AWG | 2-8 single / 4-16 dual | Compact signal and power, tight packaging |
| Micro-Fit 3.0 | 3.0mm | 8.5A with 43030 terminal and 18 AWG | 18-30 AWG | 2-12 single / 2-24 dual | Mid-density power and signal workhorse |
| Ultra-Fit | 3.5mm | 14A with 172253 tin terminals and 16 AWG in a 2-circuit single-row wire-to-board set | 16-22 AWG | 2-8 single / 4-16 dual | Compact 600V power with glow-wire options |
| Mini-Fit Jr. | 4.2mm | 9A with 5556 terminal and 24-18 AWG variant; 13A with 45750 HCS terminal and 16 AWG | 16-28 AWG | 2-24 dual | Classic power interconnect |
| Mega-Fit | 5.7mm | 23A at 600V with Mega-Fit terminals and 12 AWG; 30A peak with Mega-Fit terminals and 10 AWG in a 2-circuit wire-to-wire set | 10-16 AWG | 2-8 single / 2-12 dual | High-current power runs |
*Max current is the best case from Molex family data. Real limits come from the exact terminal, wire, circuit count, ambient temperature, and housing selected.
Choose Nano-Fit when 2.5mm pitch and 20-26 AWG wire fit the electrical plan. Step up to Micro-Fit 3.0 for broader 18-30 AWG coverage, Mini-Fit Jr. for classic 4.2mm power interconnects, or Mega-Fit for heavier current and wire.
The Nano-Fit limits that matter
Use Nano-Fit for compact 2.5mm pitch layouts. The 8.0A condition requires 105300 terminals, 20 AWG wire, and a 2-circuit wire-to-board layout.
Electrical
- Pitch
- 2.50mm
- Top Current
- 8.0A with 105300 terminals and 20 AWG in a 2-circuit wire-to-board set
- Agency Data
- 4A at 250V with selected Nano-Fit terminals and wire in the published 20-26 AWG range
- Voltage
- 250V
Mechanical
- Single Row
- 2-8 circuits, 105307 receptacle, 200277 plug
- Dual Row
- 4-16 circuits, 105308 receptacle, 201444 plug
- Cycles
- 25 tin, 50 gold
- Options
- 105325 TPA, 217140 CPA
Environmental
- Temperature
- -40 to 125 C, wire rating governs
- Shock And Vibration
- USCAR2 data only
- Use Caveat
- Not for safety or on-engine placement without exact part review
Materials
- Female Terminal
- 105300
- Male Terminal
- 201447
- Keying
- Black mates black only; natural is separate
- Glow-Wire
- Per selected variant
Reference data comes from manufacturer CAD models and Molex family catalog data; verify final ratings against the exact selected contact and housing.
Positions, rows, and keying
Nano-Fit circuit counts
Single-row 105307 receptacles cover 2-8 circuits. Dual-row 105308 receptacles cover 4-16 circuits.
2-Circuit
105307
4-Circuit
105307
6-Circuit
1053078-Circuit
105307
12-Circuit
105308
16-Circuit
105308
Use the exact selected Nano-Fit drawing for cavity numbering. Single-row, dual-row, black, and natural keyed variants should not be treated as one generic face.
Color keying and accessory options
Nano-Fit black housings mate with black only. Natural housings are a separate keyed choice, so color is part of the compatibility decision.
TPA and CPA accessories are optional by selected housing. Glow-wire behavior is per part number, not a blanket family claim.
Black KeyNatural Key
Nano-Fit connector stack
What completes a Nano-Fit connection
A Nano-Fit connection starts with the row format and keyed color, then matches receptacle, plug, 105300 female terminal, 201447 male terminal, and optional TPA or CPA accessory.
For compact modules, confirm wire OD and bend space early. Nano-Fit saves package volume, but the smaller wire range leaves less room for late substitutions.
- Single-Row Housings
- 105307 receptacle, 200277 plugCovers 2-8 circuits.
- Dual-Row Housings
- 105308 receptacle, 201444 plugCovers 4-16 circuits.
- Terminals
- 105300 female, 201447 maleMatch to the 20-26 AWG wire range and selected plating.
- Accessories
- 105325 TPA, 217140 CPAConfirm the accessory against the exact housing series.
Contact and accessory choices
Nano-Fit uses 105300 female terminals and 201447 male terminals. The top-current condition depends on those terminals, 20 AWG wire, and the 2-circuit wire-to-board layout.
Nano-Fit Terminals
- Female
- 105300
- Male
- 201447
- Wire
- 20-26 AWG
- Current
- 8.0A with 105300 terminals and 20 AWG in a 2-circuit wire-to-board set
Assurance Accessories
- TPA
- 105325
- CPA
- 217140
- Keying
- Black mates black only
- Variants
- Glow-wire behavior is per selected part
For quoting, treat color key, row format, terminal, TPA, CPA, and glow-wire variant as explicit part choices instead of generic Nano-Fit options.
Wire range and insulation OD
Nano-Fit covers 20-26 AWG, with insulation OD limits that vary by gauge and series. The data pack calls out 1.27mm, 1.57mm, and 1.80mm OD limits by gauge and part family.
The top current condition is tied to 20 AWG wire and a 2-circuit wire-to-board layout. Smaller wire and denser layouts need derating review.
Wire and fit checks
- Wire Range
- 20-26 AWG
- OD Limits
- 1.27, 1.57, or 1.80mm by gauge and series
- Top Current
- 8.0A with 105300 terminals and 20 AWG in a 2-circuit wire-to-board set
- Agency Data
- 4A at 250V with selected Nano-Fit terminals and wire in the published 20-26 AWG range
Final wire choice comes from the exact housing, terminal, insulation OD, bend radius, and bundle temperature. Gauge alone is not enough.
What drives cost
Nano-Fit cost moves with row format, keyed color, TPA or CPA accessories, plating, glow-wire variant, and the inspection effort required for smaller wire.
- Row Format
- Single-row simpler, dual-row denserDual-row saves package space but increases pinout and inspection density.
- Accessories
- Housing only lower, TPA or CPA higherUse accessory hardware only where the selected housing and application require it.
- Variant Control
- Natural or black, glow-wire per partDo not let substitutions mix color keys or imply glow-wire behavior across the whole family.
Stock and sourcing
MiniProto stocks 105307, 105308, 201444, and 200277 Nano-Fit families across 51 connector entries from 2-16 pins in the live configurator catalog. We quote the keyed housing, terminal, TPA or CPA accessory, and wire OD condition together.
Assembly, and the mistakes to avoid
- !Do not use the 8.0A condition unless the build uses 105300 terminals, 20 AWG wire, and a 2-circuit wire-to-board layout.
- !Do not mix black and natural keyed housings. Black mates black only.
- !Do not blanket-claim glow-wire behavior across Nano-Fit. It is per selected part number.
- !Do not place Nano-Fit in safety or on-engine service from the family name alone. Review the exact part and environment.
Common questions
What is Molex Nano-Fit used for?+
Molex Nano-Fit is the smallest Fit family at 2.5mm pitch. Use it for compact power and signal harnesses in automotive interior electronics, EV chargers, appliances, HVAC, server and storage hardware, GPU trays, and compute modules.
How much current can Nano-Fit carry?+
Nano-Fit reaches 8.0A with 105300 terminals, 20 AWG wire, and a 2-circuit wire-to-board layout. Molex agency data also lists 4A at 250V with selected Nano-Fit terminals and wire in the published 20-26 AWG range.
What is the difference between Nano-Fit receptacles and plugs?+
Single-row Nano-Fit uses 105307 receptacles and 200277 plugs across 2-8 circuits. Dual-row Nano-Fit uses 105308 receptacles and 201444 plugs across 4-16 circuits.
How does black versus natural Nano-Fit keying work?+
Black Nano-Fit housings mate with black only. Natural housings are a separate color-keyed option, so do not mix colors unless the exact part drawing confirms the intended mate.
Is Nano-Fit wire-to-board or wire-to-wire?+
Nano-Fit supports both wire-to-board and wire-to-wire planning, depending on the selected receptacle, plug, and header stack. Confirm the exact part family before assigning the harness side.
Does Nano-Fit have TPA or CPA options?+
Yes. Nano-Fit options include 105325 TPA retainers and 217140 CPA accessories where the selected housing supports them.
Build your Molex Nano-Fit harness
Pick positions, contacts, and wire. See the price as you go, then send it to our floor.