Würth Elektronik 61300421821 Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 61300421821 is a 4-position receptacle connector from the WR-PHD series, designed for board-to-board applications with 0.100" (2.54mm) pitch spacing. This through-hole component features gold-plated mating contacts, forked contact geometry, and a push-pull fastening mechanism. The connector is rated for 3A at 250VAC and operates across the temperature range of -40°C to 125°C. As an active product with UL94 V-0 flammability rating and ROHS3 compliance, equivalent and substitute parts are identified to support procurement flexibility, inventory management, and design alternatives where specific performance parameters align with application requirements.

Substiute Parts

61300421821

Würth ElektronikIn Stock: 102661300421821 Datasheet

Current PartRFQ

5-534237-2

TE Connectivity AMP ConnectorsIn Stock: 53565-534237-2 Datasheet

DirectRFQ

RS2-04-G

Adam TechIn Stock: 5536RS2-04-G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the Würth Elektronik 61300421821 are identified based on strict alignment with the following critical parameters: 4-position receptacle configuration, 0.100" (2.54mm) mating pitch, through-hole solder termination, push-pull fastening, gold mating contact finish, and board-to-board application style. All substitute parts maintain receptacle connector type classification and active product status.

The substitution logic recognizes two distinct groupings:

Direct Substitutes (Electrical and Mechanical Compatibility): Parts that match the core electrical specifications including 3A current rating, 250VAC voltage rating, and operating temperature range of -40°C to 125°C, combined with identical pitch spacing, through-hole mounting, and push-pull fastening.

Functional Equivalents (Core Compatibility with Parameter Variance): Parts that satisfy the fundamental 4-position, 2.54mm pitch, through-hole receptacle requirements with push-pull fastening and gold mating contacts, but exhibit variations in secondary parameters such as current rating, voltage rating, operating temperature range, contact type geometry, number of rows, or insulation material composition.

All identified substitutes maintain UL94 V-0 flammability rating and RoHS compliance status, ensuring regulatory alignment with the primary component.

Parameter Comparison

Engineering Selection Recommendations

Würth Elektronik 61300421821 (Primary Component): This connector is the specified reference part with full alignment across electrical and mechanical parameters. It features a 2-row configuration with forked contact geometry, 3A current capacity at 250VAC, and operates across -40°C to 125°C. ROHS3 compliance and UL94 V-0 flammability rating confirm regulatory alignment for industrial and commercial applications.

Adam Tech RS2-04-G (Preferred Substitute): This part provides the closest functional equivalence to the primary component. It maintains identical 4-position, 2.54mm pitch, 2-row configuration with forked contacts and push-pull fastening. Current rating and voltage rating specifications (3A at 250VAC) match the primary component exactly. Operating temperature range is -40°C to 105°C, which covers the lower end of the primary component's range. Insulation height (0.335" / 8.51mm) and contact post length (0.118" / 3.00mm) are within acceptable mechanical tolerances. ROHS3 compliance and UL94 V-0 rating maintain regulatory requirements. Packaging is supplied in box format rather than tube.

TE Connectivity 5-534237-2 (Functional Equivalent with Limitations): This part satisfies the fundamental 4-position, 2.54mm pitch, through-hole receptacle requirements with push-pull fastening and gold mating contacts. However, it exhibits significant parameter variations: single-row configuration versus dual-row, female socket contact type versus forked geometry, 2A current rating versus 3A, and tin post finish versus gold. Voltage rating is not specified. Operating temperature range extends to -65°C, exceeding the primary component's lower limit. Insulation material is polyester glass-filled rather than polybutylene terephthalate. This part is suitable for applications where the single-row, lower-current configuration is acceptable and where the extended low-temperature operating range provides additional margin.

All three parts maintain active product status and appropriate compliance certifications for continued procurement and design implementation.

Frequently Asked Questions (FAQ)

Q: Can the TE Connectivity 5-534237-2 be used as a direct replacement for the Würth Elektronik 61300421821?

A: The TE Connectivity 5-534237-2 is a functional equivalent with significant parameter differences. It features a single-row configuration instead of dual-row, female socket contacts instead of forked contacts, and a 2A current rating instead of 3A. Voltage rating is not specified. This part is suitable for applications where the single-row layout and lower current capacity are acceptable. For applications requiring dual-row configuration and 3A capacity at 250VAC, the Adam Tech RS2-04-G is the preferred substitute.

Q: What are the key mechanical differences between these substitute parts?

A: The primary mechanical differences are: (1) Row configuration—Würth Elektronik and Adam Tech both feature 2-row layouts with 0.100" row spacing, while TE Connectivity features a single-row configuration; (2) Contact geometry—Würth Elektronik and Adam Tech use forked contacts, while TE Connectivity uses female socket contacts; (3) Insulation height varies slightly: Würth Elektronik 0.331" (8.40mm), Adam Tech 0.335" (8.51mm), and TE Connectivity 0.340" (8.64mm); (4) Contact post length: Würth Elektronik 0.122" (3.10mm), Adam Tech 0.118" (3.00mm), and TE Connectivity 0.115" (2.92mm).

Q: Are all substitute parts RoHS compliant?

A: Yes. The Würth Elektronik 61300421821 and Adam Tech RS2-04-G are both ROHS3 compliant. The TE Connectivity 5-534237-2 is RoHS compliant. All three parts meet RoHS requirements for lead-free and restricted substance compliance.

Q: What is the operating temperature difference between the primary part and substitutes?

A: The Würth Elektronik 61300421821 operates from -40°C to 125°C. The Adam Tech RS2-04-G operates from -40°C to 105°C, providing coverage of the primary component's range except for the upper 20°C margin. The TE Connectivity 5-534237-2 operates from -65°C to 125°C, extending the lower temperature limit by 25°C while maintaining the upper limit. Selection depends on application temperature requirements.

Q: What is the current rating difference, and when does it matter?

A: The Würth Elektronik 61300421821 and Adam Tech RS2-04-G are both rated for 3A. The TE Connectivity 5-534237-2 is rated for 2A. For applications requiring continuous current delivery at or above 2.5A, the TE Connectivity part is not suitable. For applications with maximum current requirements below 2A, all three parts are acceptable.

Q: How do the contact materials differ?

A: Würth Elektronik uses copper alloy contacts, Adam Tech uses brass contacts, and TE Connectivity uses phosphor bronze contacts. All three materials are suitable for gold-plated mating surfaces and provide adequate electrical conductivity and mechanical durability for standard board-to-board applications.

Q: What packaging formats are available?

A: The Würth Elektronik 61300421821 and TE Connectivity 5-534237-2 are supplied in tube packaging. The Adam Tech RS2-04-G is supplied in box packaging. Packaging format may affect handling, storage, and integration into automated assembly processes.

Q: Can these parts be used interchangeably in existing PCB designs?

A: Mechanical and electrical interchangeability depends on specific design requirements. The Adam Tech RS2-04-G maintains the same 2-row, 2.54mm pitch configuration as the primary part and is mechanically compatible with existing footprints. The TE Connectivity 5-534237-2 features a single-row configuration and requires a different PCB footprint. Verification of PCB layout compatibility is necessary before substitution.

Q: What is the voltage rating for the TE Connectivity 5-534237-2?

A: The voltage rating for the TE Connectivity 5-534237-2 is not specified in the provided technical data. For applications requiring 250VAC operation, the Würth Elektronik 61300421821 or Adam Tech RS2-04-G are recommended.