SPS-21T-250 Equivalent & Substitute Parts

Part Overview

The SPS-21T-250 is a 0.250" (6.35mm) Quick Connect Female Crimp Connector manufactured by JST Sales America Inc., designed for 18-22 AWG wire termination in non-insulated applications. This terminal operates as a free-hanging, in-line connector with brass contacts finished in tin. The part is currently active in production with full RoHS compliance and MSL Level 1 rating, indicating unlimited shelf life under standard storage conditions. Substitute parts are identified when equivalent electrical and mechanical parameters align with the original specification, enabling component interchangeability in applications where the primary part faces supply constraints or inventory limitations.

Key Parameters

Parameter	Value
Tab Width	0.250" (6.35mm)
Tab Thickness	0.032" (0.81mm)
Wire Gauge	18-22 AWG
Gender	Female
Termination Method	Crimp
Insulation Type	Non-Insulated
Contact Material	Brass
Contact Finish	Tin
Insulation Diameter Range	0.059" ~ 0.122" (1.50mm ~ 3.10mm)
Mounting Type	Free Hanging (In-Line)
RoHS Status	RoHS Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the SPS-21T-250 is determined by strict alignment of the following critical parameters:

Tab Width: 0.250" (6.35mm) — must match exactly for mating compatibility
Tab Thickness: 0.032" (0.81mm) — must match exactly for contact pressure and retention
Wire Gauge: 18-22 AWG — must match exactly for crimp barrel sizing
Gender: Female — must match exactly for connector pairing
Termination: Crimp — must match exactly for assembly process compatibility
Contact Material: Brass — must match exactly for electrical conductivity and corrosion resistance
Contact Finish: Tin — must match exactly for solderability and oxidation resistance
Insulation Diameter Range: 0.059" ~ 0.122" (1.50mm ~ 3.10mm) — must match exactly for wire fit
RoHS Compliance: Required for regulatory equivalence
MSL Rating: 1 (Unlimited) — must match exactly for storage and handling requirements

The substitute part 170327-1 (TE Connectivity AMP Connectors, Mark II series) meets all critical electrical and mechanical parameters. Variations in overall length and tab length do not affect substitution eligibility, as these dimensions do not impact mating interface or electrical performance.

Parameter Comparison

Parameter	SPS-21T-250 (JST)	170327-1 (TE Connectivity)	Match Status
Tab Width	0.250" (6.35mm)	0.250" (6.35mm)	Match
Tab Thickness	0.032" (0.81mm)	0.032" (0.81mm)	Match
Wire Gauge	18-22 AWG	18-22 AWG	Match
Gender	Female	Female	Match
Termination	Crimp	Crimp	Match
Insulation Type	Non-Insulated	Non-Insulated	Match
Contact Material	Brass	Brass	Match
Contact Finish	Tin	Tin	Match
Insulation Diameter Range	0.059" ~ 0.122" (1.50mm ~ 3.10mm)	0.059" ~ 0.122" (1.50mm ~ 3.10mm)	Match
Mounting Type	Free Hanging (In-Line)	Free Hanging (In-Line)	Match
RoHS Status	RoHS Compliant	RoHS Compliant	Match
MSL Rating	1 (Unlimited)	1 (Unlimited)	Match
Tab Length	0.250" (6.35mm)	0.307" (7.80mm)	Non-Critical Variation
Length - Overall	0.819" (20.80mm)	1.016" (25.80mm)	Non-Critical Variation

Engineering Selection Recommendations

The 170327-1 (TE Connectivity AMP Connectors) qualifies as a direct substitute for the SPS-21T-250 based on complete alignment of all critical electrical and mechanical parameters. Both parts are active products with RoHS compliance and MSL Level 1 certification, ensuring regulatory equivalence and consistent shelf-life performance.

The 170327-1 is available in Cut Tape (CT) packaging with 12,100 units in stock, compared to the SPS-21T-250 in Tape & Reel (TR) packaging with 830 units in stock. Packaging format selection depends on assembly process requirements and volume needs. Both parts share identical contact material, finish, wire gauge compatibility, and insulation diameter specifications, confirming functional interchangeability in the mating interface.

Frequently Asked Questions (FAQ)

Q: Can the 170327-1 be used as a direct replacement for the SPS-21T-250?

A: Yes. Both parts meet identical specifications for tab width, tab thickness, wire gauge, gender, termination method, contact material, contact finish, and insulation diameter range. All critical parameters for mating compatibility and electrical performance align exactly.

Q: What is the significance of the different tab and overall lengths?

A: Tab length and overall length are non-critical dimensional variations that do not affect the mating interface or electrical performance. These dimensions relate to connector housing design and do not impact substitution eligibility.

Q: Are there packaging differences between these parts?

A: Yes. The SPS-21T-250 is supplied in Tape & Reel (TR) packaging, while the 170327-1 is supplied in Cut Tape (CT) packaging. Packaging selection should align with your assembly equipment and volume requirements.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the SPS-21T-250 and 170327-1 are RoHS Compliant with MSL Level 1 (Unlimited) ratings, ensuring equivalent regulatory status and storage stability.

Q: What wire gauges are compatible with these connectors?

A: Both parts are rated for 18-22 AWG wire termination with an insulation diameter range of 0.059" to 0.122" (1.50mm to 3.10mm).

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