A3C-22P-2DSA Equivalent & Substitute Parts

Part Overview

The A3C-22P-2DSA is a rectangular connector header manufactured by Hirose Electric Co Ltd, designed for through-hole board-to-board or cable applications with 22 positions arranged in 2 rows at 0.079" (2.00mm) pitch. This connector is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support, maintenance, and new production requirements. The part features unshrouded design, solder termination, and push-pull fastening with gold-plated mating contacts rated for 1A at 200V operation across -55°C to 85°C temperature range.

Substiute Parts

A3C-22P-2DSA

Hirose Electric Co LtdIn Stock: 772A3C-22P-2DSA Datasheet

Current PartRFQ

MTMM-111-03-S-D-110

Samtec Inc.In Stock: 924MTMM-111-03-S-D-110 Datasheet

MFR RecommendedRFQ

MTMM-111-04-G-D-110

Samtec Inc.In Stock: 690MTMM-111-04-G-D-110 Datasheet

MFR RecommendedRFQ

TMM-111-01-L-D-002

Samtec Inc.In Stock: 956TMM-111-01-L-D-002 Datasheet

MFR RecommendedRFQ

TMM-111-02-S-D

Samtec Inc.In Stock: 1136TMM-111-02-S-D Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the A3C-22P-2DSA are qualified based on the following critical parameters that must align with the original specification:

• Pitch - Mating: 0.079" (2.00mm) — exact match required
• Number of Positions: 22 — exact match required
• Number of Rows: 2 — exact match required
• Row Spacing - Mating: 0.079" (2.00mm) — exact match required
• Connector Type: Header — exact match required
• Contact Type: Male Pin — exact match required
• Mounting Type: Through Hole — exact match required
• Termination: Solder — exact match required
• Fastening Type: Push-Pull — exact match required
• Style: Board to Board or Cable — exact match required
• Shrouding: Unshrouded — exact match required

All four substitute parts meet these mandatory criteria. Variations in contact material (Phosphor Bronze vs. Brass), insulation material (Liquid Crystal Polymer vs. Polyamide), contact finish thickness, and operating temperature range are permitted within the scope of functional equivalence for this connector category. The substitute parts from Samtec Inc. (MTMM and TMM series) are active products with enhanced specifications in current rating and temperature range compared to the obsolete A3C-22P-2DSA.

Parameter Comparison

Engineering Selection Recommendations

All four substitute parts are active products from Samtec Inc. and provide functional equivalence to the obsolete A3C-22P-2DSA. Selection among the substitutes depends on specific application requirements:

MTMM-111-03-S-D-110 and MTMM-111-04-G-D-110 feature cuttable connector design, allowing field customization of position count. MTMM-111-04-G-D-110 provides gold plating on both mating and post contacts, whereas MTMM-111-03-S-D-110 uses tin plating on posts. Both MTMM variants support 3A current rating and extended operating temperature to 125°C.

TMM-111-01-L-D-002 loads 21 of 22 positions and supports 3.2A per contact with tin-plated posts. TMM-111-02-S-D loads all 22 positions and supports 3.2A per contact with tin-plated posts, available in bulk packaging.

All substitute parts are ROHS3 compliant and maintain UL94 V-0 flammability rating (where specified). The substitutes exceed the original part's current rating and temperature range, providing enhanced performance margins for new designs or replacement applications.

Frequently Asked Questions (FAQ)

Q: Can TMM-111-02-S-D directly replace A3C-22P-2DSA in existing designs?

A: Yes. TMM-111-02-S-D matches all critical mating parameters: 0.079" (2.00mm) pitch, 22 positions in 2 rows, through-hole solder termination, and push-pull fastening. The substitute provides higher current rating (3.2A vs. 1A) and extended temperature range (-55°C to 125°C vs. -55°C to 85°C), making it functionally compatible for board-to-board and cable applications.

Q: What is the difference between MTMM and TMM series substitutes?

A: MTMM series connectors feature cuttable design, allowing customization of position count in the field. TMM series are fixed-position headers. Both series use Phosphor Bronze contacts with gold mating finish and support higher current ratings than the original A3C-22P-2DSA. MTMM variants are available with either tin or gold post plating; TMM variants use tin post plating.

Q: Why do substitute parts have higher current ratings than the original?

A: The substitute parts use Phosphor Bronze contact material and Liquid Crystal Polymer insulation, which provide superior electrical and thermal characteristics compared to the original Brass and Polyamide construction. These material upgrades enable higher current capacity per contact while maintaining the same physical footprint and pitch.

Q: Is TMM-111-01-L-D-002 suitable if only 21 positions are needed?

A: TMM-111-01-L-D-002 loads 21 of 22 available positions. This part is suitable only if your application requires exactly 21 loaded positions. For applications requiring all 22 positions loaded, use TMM-111-02-S-D, MTMM-111-03-S-D-110, or MTMM-111-04-G-D-110.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All four substitute parts are ROHS3 compliant. The original A3C-22P-2DSA compliance status is not specified in available documentation.

Q: What packaging options are available for substitutes?

A: TMM-111-02-S-D is available in bulk packaging. MTMM-111-03-S-D-110, MTMM-111-04-G-D-110, and TMM-111-01-L-D-002 packaging specifications are not detailed. Contact the manufacturer for specific packaging requirements.