RL187-331J-RC Equivalent & Substitute Parts

Part Overview

The RL187-331J-RC is a 330 µH unshielded drum core wirewound inductor manufactured by Bourns Inc., rated for 200 mA with a maximum DC resistance of 4Ohm. This through-hole component operates across a temperature range of -55°C to 105°C and is designed for radial, vertical cylinder mounting. The part is currently obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and component procurement.

Substiute Parts

RL187-331J-RC

Bourns Inc.In Stock: 776RL187-331J-RC Datasheet

Current PartRFQ

AIUR-04-331J

Abracon LLCIn Stock: 901AIUR-04-331J Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The AIUR-04-331J from Abracon LLC qualifies as a direct substitute based on the following critical parameters:

• Inductance value matches exactly at 330 µH with identical ±5% tolerance
• Current rating is equivalent at 200 mA
• DC resistance specification is identical at 4Ohm Max
• Core material, shielding configuration, and mounting type are identical
• Self-resonant frequency matches at 2.3 MHz
• Test frequency matches at 796 kHz
• Package configuration (radial, vertical cylinder) is identical
• Physical dimensions are compatible for through-hole PCB mounting

The substitute part maintains all critical electrical and mechanical parameters required for functional equivalence in the original application.

Parameter Comparison

Engineering Selection Recommendations

The AIUR-04-331J is suitable for direct substitution of the RL187-331J-RC based on electrical and mechanical parameter equivalence. The substitute part is currently in active production status, ensuring long-term availability and supply chain continuity. Both components maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for equivalent applications.

The minor dimensional variance in diameter (0.335" versus 0.315") remains within acceptable tolerances for radial through-hole mounting configurations. Height specifications are identical, ensuring consistent PCB assembly clearance.

Frequently Asked Questions (FAQ)

Q: Can AIUR-04-331J replace RL187-331J-RC in existing designs?

A: Yes. The substitute part matches all critical electrical parameters including inductance, current rating, DC resistance, and frequency characteristics. Physical dimensions are compatible with standard through-hole PCB layouts.

Q: What are the key differences between these parts?

A: The primary differences are manufacturer identity and product status. The RL187-331J-RC is obsolete, while the AIUR-04-331J is in active production. The Q factor differs (80 @ 796kHz versus 30 @ 796kHz), and operating temperature ranges vary (RL187: -55°C to 105°C; AIUR-04: -25°C to 85°C). Diameter dimensions differ slightly (8.00mm versus 8.50mm).

Q: Are there any compliance concerns with substitution?

A: No. Both parts maintain ROHS3 compliance and REACH unaffected status, meeting standard regulatory requirements for equivalent component substitution.

Q: Does the operating temperature range difference affect substitution?

A: The AIUR-04-331J operates within -25°C to 85°C, which is narrower than the original part's -55°C to 105°C range. Substitution is appropriate only for applications operating within the -25°C to 85°C window.

Q: What is the significance of the Q factor difference?

A: The Q factor (quality factor) at 796 kHz differs between parts (80 versus 30). This parameter affects inductor efficiency and frequency response characteristics. Applications sensitive to Q factor performance should evaluate this specification against circuit requirements.

Q: Are packaging formats compatible?

A: Both parts use radial, vertical cylinder through-hole packaging with identical height specifications (11.20mm). The slight diameter increase (0.50mm) is within standard PCB pad tolerances for radial components.