OSTTS04A15C Terminal Block Plug - Equivalent & Substitute Parts

Part Overview

The OSTTS04A15C is a 4-position terminal block plug manufactured by On Shore Technology Inc., designed for free-hanging (in-line) applications with screw termination. This active product features female sockets with 0.295" (7.50mm) pitch spacing and supports wire gauges from 12-24 AWG. The component is rated for 300V UL operation and operates across -30°C to 105°C, with UL94 V-0 flammability compliance and ROHS3 certification.

Equivalent and substitute parts are identified when they maintain functional compatibility across critical electrical and mechanical parameters while serving the same application role. Substitute components must preserve pitch spacing tolerance, position count, termination methodology, voltage rating, and wire gauge compatibility to ensure direct interchangeability in circuit designs.

Substiute Parts

OSTTS04A15C

On Shore Technology Inc.In Stock: 1097OSTTS04A15C Datasheet

Current PartRFQ

1847903

Phoenix ContactIn Stock: 12221847903 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the OSTTS04A15C is determined by the following critical parameters:

Position and Pitch Compatibility: The substitute must maintain 4 positions with pitch spacing within acceptable tolerance of 0.295" (7.50mm). The Phoenix Contact 1847903 operates at 0.300" (7.62mm) pitch, representing a 0.005" (0.12mm) variance. This minor pitch difference falls within standard mechanical tolerance for terminal block connectors and permits functional substitution in applications where connector bodies are designed to accommodate standard pitch variations.

Electrical Rating Alignment: Both components must support minimum 300V UL operation. The OSTTS04A15C is rated 300V UL; the 1847903 is rated 300V UL and 1 kV IEC, exceeding the baseline requirement.

Wire Gauge Compatibility: The substitute must accommodate the 12-24 AWG wire range of the primary component. The 1847903 accepts 12-30 AWG (0.2-2.5mm²), which encompasses and exceeds the original specification.

Termination and Mounting: Both components employ screw-based termination and free-hanging (in-line) mounting, ensuring mechanical and electrical connection consistency.

Regulatory Compliance: Both components carry UL94 V-0 flammability rating, ROHS3 compliance, and REACH unaffected status, meeting identical regulatory requirements.

Parameter Comparison

Engineering Selection Recommendations

The Phoenix Contact 1847903 qualifies as a functional substitute for the OSTTS04A15C based on alignment of critical electrical and mechanical parameters. Both components maintain active product status and carry identical regulatory certifications (UL94 V-0, ROHS3, REACH unaffected).

The 1847903 provides equivalent or superior performance across specified parameters: 300V UL rating matches the primary component, wire gauge range (12-30 AWG) encompasses the original 12-24 AWG specification, and screw-based termination with free-hanging mounting ensures mechanical compatibility. The pitch variance of 0.005" (0.12mm) between 7.50mm and 7.62mm falls within standard connector tolerance and does not preclude substitution in applications designed for standard terminal block spacing.

The 1847903 incorporates rising cage clamp termination technology and mating flange features that may provide enhanced wire retention and connection reliability compared to standard screw termination. Torque specification for the 1847903 (0.5-0.6 Nm) is slightly elevated relative to the OSTTS04A15C (0.4 Nm), reflecting the cage clamp design.

Selection between these components should be based on application-specific requirements regarding termination method preference, available inventory, and connector body compatibility with the 0.005" pitch difference.

Frequently Asked Questions (FAQ)

Q: Can the Phoenix Contact 1847903 directly replace the OSTTS04A15C in existing designs?

A: The 1847903 is functionally compatible as a substitute. The 0.005" (0.12mm) pitch difference between 7.50mm and 7.62mm is within standard terminal block tolerance. Verify that connector bodies and mating headers in your application accommodate this minor spacing variance. Both components share identical 4-position configuration, 300V UL rating, and screw termination methodology.

Q: What is the significance of the pitch difference between 7.50mm and 7.62mm?

A: Terminal block connectors typically operate within ±0.1mm pitch tolerance. The 0.12mm variance between these components falls within this standard range and does not compromise mechanical mating or electrical performance in applications designed for standard pitch spacing. However, applications with tight mechanical constraints should be evaluated individually.

Q: Are the wire gauge ranges compatible?

A: Yes. The OSTTS04A15C accepts 12-24 AWG; the 1847903 accepts 12-30 AWG. The 1847903 range fully encompasses the original specification, ensuring compatibility with all wire sizes supported by the primary component.

Q: Do both components meet the same regulatory requirements?

A: Yes. Both the OSTTS04A15C and 1847903 carry UL94 V-0 flammability rating, ROHS3 compliance, and REACH unaffected status. Electrical ratings (300V UL) are identical, meeting baseline regulatory requirements for this product category.

Q: What is the difference between screw termination and rising cage clamp termination?

A: The OSTTS04A15C uses standard screw termination. The 1847903 uses screw-based rising cage clamp termination, which provides mechanical wire retention through a spring-loaded cage mechanism in addition to screw clamping. This design may offer enhanced connection reliability and reduced risk of wire displacement under vibration or thermal cycling.

Q: Should I consider the torque specification difference?

A: The OSTTS04A15C specifies 0.4 Nm (3.5 Lb-In) torque; the 1847903 specifies 0.5-0.6 Nm (4.4-5.3 Lb-In). The elevated torque for the 1847903 reflects its cage clamp design and should be applied during installation to ensure proper wire retention. Consult the Phoenix Contact datasheet for detailed torque application procedures.