FH21-20S-1DSA Equivalent & Substitute Parts

Part Overview

The FH21-20S-1DSA is a 20-position FFC/FPC vertical connector manufactured by Hirose Electric Co Ltd with 1.00mm pitch and through-hole mounting. This connector features low insertion force (LIF) operation, phosphor bronze contacts with solder plating, and is rated for 50V and 0.5A. The product is currently obsolete, making equivalent substitute parts necessary for ongoing system support and component sourcing.

Key Parameters

Parameter	Value
Manufacturer Part Number	FH21-20S-1DSA
Manufacturer	Hirose Electric Co Ltd
Category	FFC, FPC (Flat Flexible) Connectors
Number of Positions	20
Pitch	0.039" (1.00mm)
Mounting Type	Through Hole
Connector/Contact Type	Contacts, Vertical - 2 Sided
Voltage Rating	50V
Current Rating	0.5A
Operating Temperature	-30°C ~ 70°C
FFC/FPC Thickness	0.30mm
Height Above Board	0.228" (5.80mm)
Termination	Kinked Pin
Contact Material	Phosphor Bronze
Housing Material	Polybutylene Terephthalate (PBT)
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution eligibility for the FH21-20S-1DSA is determined by the following critical parameters:

Number of Positions: Must be 20
Pitch: Must be 0.039" (1.00mm)
Mounting Type: Must be Through Hole
FFC/FPC Thickness: Must be 0.30mm
Termination: Must be Kinked Pin
Voltage Rating: Minimum 50V
Current Rating: Minimum 0.5A
Connector/Contact Type: Vertical orientation (1-sided or 2-sided acceptable)

Three substitute parts meet these criteria. The primary distinction among substitutes is the contact configuration (1-sided versus 2-sided), which affects mechanical fit and board layout compatibility. All substitutes maintain the same electrical specifications and physical pitch requirements.

Parameter Comparison

Parameter	FH21-20S-1DSA (Main)	006232020006800+ (KYOCERA AVX)	0528062010 (Molex)	2-84984-0 (TE Connectivity)
Manufacturer	Hirose Electric Co Ltd	KYOCERA AVX	Molex	TE Connectivity AMP Connectors
Number of Positions	20	20	20	20
Pitch	0.039" (1.00mm)	0.039" (1.00mm)	0.039" (1.00mm)	0.039" (1.00mm)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Connector/Contact Type	Vertical - 2 Sided	Vertical - 1 Sided	Vertical - 1 Sided	Vertical - 1 Sided
FFC/FPC Thickness	0.30mm	0.30mm	0.30mm	0.30mm
Height Above Board	0.228" (5.80mm)	0.217" (5.50mm)	0.213" (5.40mm)	0.220" (5.59mm)
Termination	Kinked Pin	Kinked Pin	Kinked Pin	Kinked Pin
Contact Material	Phosphor Bronze	Copper Alloy	Phosphor Bronze	Phosphor Bronze
Contact Finish	Solder Plating	Tin	Tin	Tin
Housing Material	Polybutylene Terephthalate (PBT)	Thermoplastic	Polyphenylene Sulfide (PPS)	Polybutylene Terephthalate (PBT), Glass Filled
Voltage Rating	50V	50V	50V	125V
Current Rating	0.5A	0.5A	0.5A	1A
Operating Temperature	-30°C ~ 70°C	-20°C ~ 85°C	-20°C ~ 80°C	-20°C ~ 85°C
Mating Cycles	10	-	10	-
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active

Engineering Selection Recommendations

All three substitute parts are active products with current manufacturing availability, addressing the obsolescence of the FH21-20S-1DSA.

006232020006800+ (KYOCERA AVX): This substitute is ROHS3 compliant and maintains the same voltage and current ratings as the original. The contact configuration is vertical 1-sided, which differs from the original 2-sided design. Height above board is 0.217" (5.50mm), approximately 0.011" lower than the original. This part is suitable for applications where RoHS compliance is required and board space permits the reduced height.

0528062010 (Molex): This substitute is ROHS3 compliant and maintains the same voltage and current ratings as the original. The contact configuration is vertical 1-sided. Height above board is 0.213" (5.40mm), the lowest among all substitutes. This part is suitable for space-constrained applications requiring RoHS compliance.

2-84984-0 (TE Connectivity AMP Connectors): This substitute is ROHS3 compliant and provides enhanced electrical ratings with 125V voltage rating and 1A current rating, exceeding the original specifications. The contact configuration is vertical 1-sided. Height above board is 0.220" (5.59mm), closest to the original dimension. This part is suitable for applications requiring higher electrical margins or future design upgrades.

Frequently Asked Questions (FAQ)

Q: Can I use a 1-sided contact connector to replace the 2-sided original? A: The substitutes listed feature 1-sided vertical contact configuration compared to the original 2-sided design. Compatibility depends on your specific board layout and connector mating requirements. Verify that your FFC/FPC cable and board receptacle are compatible with the 1-sided contact geometry.

Q: What is the impact of different heights above board? A: The substitute parts range from 0.213" to 0.228" in height above board. The Molex 0528062010 is 0.015" shorter than the original, while the TE Connectivity 2-84984-0 is 0.008" shorter. Verify clearance in your enclosure or assembly to ensure no interference with adjacent components.

Q: Are all substitutes RoHS compliant? A: Yes, all three substitute parts are ROHS3 compliant. The original FH21-20S-1DSA is RoHS non-compliant. If your application requires RoHS compliance, any of the three substitutes is acceptable.

Q: Do the substitutes support the same current and voltage ratings? A: The KYOCERA AVX and Molex substitutes maintain the original 50V/0.5A ratings. The TE Connectivity 2-84984-0 provides higher ratings at 125V/1A, offering additional electrical margin.

Q: What is the difference in contact material between substitutes? A: The original and Molex substitute use phosphor bronze contacts. The KYOCERA AVX substitute uses copper alloy contacts. The TE Connectivity substitute uses phosphor bronze contacts. All are suitable for the specified electrical environment.

Q: How do contact finish differences affect performance? A: The original uses solder plating, while all substitutes use tin finish. Tin finish is standard for FFC/FPC connectors and provides equivalent performance for the specified voltage and current ratings.

Q: What packaging is available for each substitute? A: KYOCERA AVX 006232020006800+ is supplied in Tray packaging. Molex 0528062010 is supplied in Tray packaging. TE Connectivity 2-84984-0 is supplied in Tube packaging.

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