Power Distribution
Server, telecom, and cabinet power distribution where high-current service disconnects are required.
Molex 5.7mm high-current Fit connectors
Molex Mega-Fit connectors for high-current power runs
Select Mega-Fit single-row or dual-row housings, 76823 and 172063 terminals, TPA and CPA options, backshells, wire range, and circuit count for high-current harnesses.
5.70mm Pitch2-12 Circuits10-16 AWG600V
Why Molex Mega-Fit connectors exist
Molex Mega-Fit is the 5.7mm Fit family for high-current power runs. It is the step up when Nano-Fit, Micro-Fit 3.0, or Mini-Fit Jr. cannot carry the selected terminal and wire condition.
Dual-row Mega-Fit receptacles include 171692 PBT standard housings and 170001 glow-wire nylon variants across 2-12 circuits. Single-row Mega-Fit includes 200456 receptacles and 213814 or 213815 plugs across 2-8 circuits.
Terminal options include 76823 tin and 172063 gold female terminals for 16-10 AWG wire, plus 105417 and 105418 male terminals. Accessories include 105415 TPA, 228006 CPA, and 200122 backshells.
MiniProto stocks 171692 and 170001 dual-row Mega-Fit families from 2-12 circuits in the live configurator catalog.
Why teams choose Molex Mega-Fit
Mega-Fit is the Fit choice when heavier wire, higher current, and robust power distribution matter more than compact pitch.
High Current
Mega-Fit supports heavier 10-16 AWG wire ranges where smaller Fit families run out of margin.
Power Packaging
Single-row and dual-row options let the harness trade current path, density, and board packaging.
Accessory Stack
TPA, CPA, backshell, tin, gold, standard, and glow-wire variants let the exact part control the application fit.
Where Molex Mega-Fit earns its place
Appliances And Machinery
Washers, AC units, ovens, industrial machines, and lighting where heavier branch power is routed through a harness.
Automotive Control Power
Unsealed control modules and power converters where the exact environment supports Mega-Fit use.
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 Mega-Fit when the selected terminal and 10-16 AWG wire condition demands a 5.7mm high-current family. If the design can use smaller wire or lower current, Micro-Fit 3.0, Mini-Fit Jr., or Nano-Fit may save space.
The Mega-Fit limits that matter
Use Mega-Fit for high-current 5.7mm pitch power layouts. The 30A peak condition requires Mega-Fit terminals, 10 AWG wire, and a single-row 2-circuit wire-to-wire set.
Electrical
- Pitch
- 5.70mm
- Peak Current
- 30A with Mega-Fit terminals and 10 AWG in a single-row 2-circuit wire-to-wire set
- Published Current
- 23A at 600V with Mega-Fit terminals and 12 AWG
- Dual-Row WTB
- 16A with Mega-Fit terminals and 12 AWG in 8-12 circuit layouts
Mechanical
- Dual Row
- 2-12 circuits, 171692 or 170001 receptacles
- Single Row
- 2-8 circuits, 200456 receptacle, 213814 or 213815 plugs
- Cycles
- 25 tin, 200 gold
- Accessories
- 105415 TPA, 228006 CPA, 200122 backshell
Environmental
- Temperature Tin
- -40 to 105 C
- Temperature Gold
- -40 to 120 C
- Use
- USCAR-2 data for unsealed control modules and power converters, not safety or on-engine placement
- Hot-Plug
- Selected 170001 parts only, verify exact terminal and wire condition
Materials
- Standard Dual Row
- 171692 PBT
- Glow-Wire Dual Row
- 170001 nylon
- Female Terminals
- 76823 tin, 172063 gold
- Male Terminals
- 105417, 105418
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
Mega-Fit circuit counts
Common 171692 dual-row receptacle housing sizes. Single-row Mega-Fit covers 2-8 circuits, while dual-row covers 2-12 circuits.
2-Circuit
171692
4-Circuit
171692
6-Circuit
1716928-Circuit
171692
10-Circuit
171692
12-Circuit
171692
Use the exact selected Mega-Fit drawing for cavity numbering. Current, circuit count, row format, and wire-to-board versus wire-to-wire layout are linked decisions.
Standard, glow-wire, and row-format choices
Mega-Fit current planning starts with row format and circuit count. Single-row 2-circuit wire-to-wire is the condition behind the 30A peak value with Mega-Fit terminals and 10 AWG wire.
Glow-wire behavior is per selected part. For example, 1716920102 is not a glow-wire part, while 1700010104 is a glow-wire variant.
Mega-Fit connector stack
What completes a Mega-Fit connection
A Mega-Fit connection combines the selected row format, receptacle and plug families, 76823 or 172063 female terminals, matching male terminals, and optional TPA, CPA, or backshell accessories.
For power distribution, decide wire-to-wire versus wire-to-board early because it changes the current condition, circuit count, and mechanical retention plan.
- Dual-Row Housings
- 171692 PBT standard, 170001 glow-wire nylonCovers 2-12 receptacles in the stocked family.
- Single-Row Housings
- 200456 receptacle, 213814 or 213815 plugsCovers 2-8 circuits.
- Terminals
- 76823 tin, 172063 gold female; 105417 and 105418 maleFemale terminal range is 16-10 AWG.
- Accessories
- 105415 TPA, 228006 CPA, 200122 backshellConfirm accessories against the selected housing and row format.
Contact and accessory choices
Mega-Fit terminal and wire selection controls the current condition. Use 76823 tin or 172063 gold female terminals for 16-10 AWG wire where the selected housing supports them.
Tin And Gold Terminals
- Tin Female
- 76823
- Gold Female
- 172063
- Male
- 105417, 105418
- Wire
- 16-10 AWG on female terminals
Current Conditions
- Peak
- 30A with Mega-Fit terminals and 10 AWG in a single-row 2-circuit wire-to-wire set
- Published
- 23A at 600V with Mega-Fit terminals and 12 AWG
- Dual WTB
- 16A with Mega-Fit terminals and 12 AWG in 8-12 circuit layouts
- Hot-Plug
- Selected 170001 parts only, verify exact terminal and wire condition
For quoting, tie each current requirement to row format, circuit count, terminal series, wire gauge, and housing series. Mega-Fit is not one current rating across every part.
Wire size and current condition
Mega-Fit wire-to-wire planning spans 16-10 AWG. Wire-to-board planning spans 16-12 AWG.
The 30A peak value is not a generic Mega-Fit rating. It requires Mega-Fit terminals, 10 AWG wire, and a single-row 2-circuit wire-to-wire layout.
Wire and fit checks
- WTW Wire
- 16-10 AWG
- WTB Wire
- 16-12 AWG
- Peak Current
- 30A with Mega-Fit terminals and 10 AWG in a single-row 2-circuit wire-to-wire set
- Dual WTB Current
- 16A with Mega-Fit terminals and 12 AWG in 8-12 circuit layouts
Final wire choice comes from the exact housing, terminal, insulation OD, bend radius, and bundle temperature. Gauge alone is not enough.
What drives cost
Mega-Fit cost moves with terminal plating, wire gauge, row format, circuit count, glow-wire part selection, and accessory stack.
- Wire Gauge
- 16 AWG lower, 10 AWG higherHeavier wire increases material, stripping, crimping, and bend-space requirements.
- Terminal Plating
- Tin lower, gold higherUse 172063 gold only when the selected design calls for it.
- Housing Variant
- 171692 standard, 170001 selected glow-wireGlow-wire and hot-plug caveats are per selected part, not family-wide.
Stock and sourcing
MiniProto stocks 171692 and 170001 Mega-Fit dual-row families across 15 connector entries from 2-12 circuits in the live configurator catalog. We quote terminal plating, wire gauge, accessory stack, and row format together so the current condition stays intact.
Assembly, and the mistakes to avoid
- !Do not use the 30A peak value unless the build uses Mega-Fit terminals, 10 AWG wire, and a single-row 2-circuit wire-to-wire set.
- !Do not blanket-claim glow-wire or hot-plug behavior. Those caveats are tied to selected 170001 parts and exact terminal and wire conditions.
- !Do not treat wire-to-wire and wire-to-board current tables as interchangeable.
- !Do not place Mega-Fit in safety or on-engine service from the family name alone. Review the exact part and environment.
Common questions
What is Molex Mega-Fit used for?+
Molex Mega-Fit is a 5.7mm pitch high-current power connector family for appliances, telecom and server power distribution, industrial machinery, lighting, and unsealed automotive control modules or power converters.
How much current can Mega-Fit carry?+
The 30A peak condition applies to a single-row 2-circuit wire-to-wire set with Mega-Fit terminals and 10 AWG wire. Molex data also lists 23A at 600V with Mega-Fit terminals and 12 AWG wire, and dual-row wire-to-board values that drop to 16A with Mega-Fit terminals and 12 AWG wire in 8-12 circuit layouts.
What is the difference between 171692 and 170001?+
171692 is the standard dual-row receptacle family. 170001 is a glow-wire nylon dual-row family where hot-plug data applies only to selected 170001 parts. Do not apply those caveats to every Mega-Fit housing.
Which terminals does Mega-Fit use?+
Mega-Fit terminal options include 76823 tin and 172063 gold female terminals for 16-10 AWG wire, plus 105417 and 105418 male terminals where the selected housing and wire-to-wire stack require them.
Should I choose single-row or dual-row Mega-Fit?+
Use single-row Mega-Fit for 2-8 circuits when the layout needs the highest-current wire-to-wire path. Use dual-row Mega-Fit for 2-12 circuits when density and board or panel packaging matter more.
Is every Mega-Fit part hot-plug rated?+
No. Hot-plug behavior is tied to selected 170001 series parts and the exact terminal, wire, circuit count, and voltage condition. Do not treat it as a blanket Mega-Fit feature.
Build your Molex Mega-Fit harness
Pick positions, contacts, and wire. See the price as you go, then send it to our floor.