PCMC135T-R68MF Equivalent & Substitute Parts

Part Overview

The PCMC135T-R68MF is a 680 nH unshielded surface mount inductor manufactured by Susumu, rated for 34 A continuous current with a maximum DC resistance of 1.7 mOhm. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing production and design requirements. Substitute parts must maintain electrical performance across the specified inductance, current rating, and DC resistance parameters while accommodating available packaging and shielding configurations.

Substiute Parts

PCMC135T-R68MF

SusumuIn Stock: 1153PCMC135T-R68MF Datasheet

Current PartRFQ

BMMA00131350R68MX1

Pulse ElectronicsIn Stock: 903BMMA00131350R68MX1 Datasheet

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HCM1305-R68-R

Eaton - Electronics DivisionIn Stock: 2165HCM1305-R68-R Datasheet

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SRP1250-R68M

Bourns Inc.In Stock: 10246SRP1250-R68M Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the PCMC135T-R68MF is determined by strict equivalence across the following electrical and mechanical parameters:

Critical Matching Parameters:

• Inductance: 680 nH at 100 kHz test frequency
• Inductance Tolerance: ±20%
• Current Rating: 34 A continuous
• Current Saturation: 54 A
• DC Resistance: Maximum 1.7 mOhm (or lower)
• Mounting Type: Surface Mount
• RoHS3 Compliance
• MSL Rating: 1 (Unlimited)

Allowable Variations:

• Shielding configuration (unshielded to shielded acceptable)
• Core material type (unshielded to molded or drum core wirewound)
• Operating temperature range (provided minimum -55°C is maintained)
• Physical dimensions within nonstandard package classification
• Product status transition from obsolete to active

All identified substitute parts maintain electrical equivalence within the specified tolerance bands and support direct functional replacement in surface mount applications.

Parameter Comparison

Engineering Selection Recommendations

BMMA00131350R68MX1 (Pulse Electronics)

This molded shielded inductor provides direct electrical equivalence with identical current rating, saturation current, and DC resistance specifications. The transition from unshielded to shielded construction reduces electromagnetic interference in sensitive circuit environments. Operating temperature range of -55°C to 125°C covers standard industrial applications. ROHS3 compliance and MSL 1 rating ensure compatibility with modern manufacturing processes. Active product status guarantees long-term availability.

HCM1305-R68-R (Eaton - Electronics Division)

The drum core wirewound construction with iron powder core delivers superior DC resistance performance at 1.33 mOhm maximum, improving efficiency in high-current applications. Shielded configuration provides electromagnetic containment. Operating temperature range extends to -55°C to 125°C. Highest inventory availability (2100 pcs) supports production volume requirements. ROHS3 compliance and active status confirm suitability for new designs.

SRP1250-R68M (Bourns Inc.)

This drum core wirewound inductor with iron core maintains exact DC resistance specification at 1.7 mOhm maximum, ensuring drop-in compatibility. Extended operating temperature range of -55°C to 150°C accommodates high-temperature applications. Largest inventory position (10227 pcs) provides supply chain security. Shielded construction reduces radiated emissions. ROHS3 compliance and active product status support long-term production continuity.

Frequently Asked Questions (FAQ)

Q: Can the PCMC135T-R68MF be replaced with a shielded inductor?

A: Yes. All identified substitute parts feature shielded construction while maintaining identical electrical specifications. Shielding reduces electromagnetic interference without affecting inductance, current rating, or DC resistance performance. Physical dimensions vary slightly but remain within nonstandard package classification.

Q: What is the significance of DC resistance differences between substitutes?

A: The HCM1305-R68-R offers lower DC resistance at 1.33 mOhm compared to the 1.7 mOhm specification of the original part. Lower DC resistance reduces power dissipation and heat generation in high-current applications. The BMMA00131350R68MX1 and SRP1250-R68M maintain the 1.7 mOhm maximum specification for direct equivalence.

Q: Are all substitute parts suitable for the same operating temperature range?

A: The BMMA00131350R68MX1 and HCM1305-R68-R operate from -55°C to 125°C. The SRP1250-R68M extends to -55°C to 150°C, providing additional thermal margin for high-temperature environments. The original PCMC135T-R68MF operating temperature was not specified.

Q: What packaging format is used for these inductors?

A: All parts are classified as nonstandard package surface mount components. The BMMA00131350R68MX1, HCM1305-R68-R, and SRP1250-R68M are supplied in Tape & Reel (TR) format for automated assembly. Physical dimensions vary: BMMA (13.20 x 12.90 x 5.00 mm), HCM1305 (13.30 x 12.20 x 5.00 mm), and SRP1250 (13.90 x 13.50 x 5.90 mm).

Q: Do all substitute parts meet current regulatory requirements?

A: All substitute parts are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity ratings. REACH status is unaffected for all parts. ECCN classification is EAR99 for all components, confirming export compliance equivalence.

Q: Which substitute offers the best inventory availability?

A: The SRP1250-R68M from Bourns Inc. provides the largest inventory position at 10227 pcs, followed by HCM1305-R68-R at 2100 pcs and BMMA00131350R68MX1 at 812 pcs. Supply chain requirements should factor inventory levels into component selection.

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

A: Electrical interchangeability is confirmed across all parameters. Physical dimension variations require PCB layout verification. The original PCMC135T-R68MF measures 13.45 x 12.60 x 4.80 mm; substitute parts range from 13.20 x 12.90 x 5.00 mm to 13.90 x 13.50 x 5.90 mm. Footprint compatibility must be confirmed before implementation.