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Equivalent & Substitute Parts for 78601/3MC-R
Part Overview
The 78601/3MC-R is a 200µH General Purpose Pulse Transformer with 1:1 turns ratio manufactured by Murata Power Solutions Inc. This surface mount component is designed for pulse transformation applications requiring 200 microhenry inductance and 6 volt-microsecond ET rating.
The 78601/3MC-R carries a "Not For New Designs" product status, indicating it has been superseded or discontinued for new applications. Organizations currently using this component in active designs or requiring replacement stock should evaluate qualified substitute parts that maintain electrical and mechanical compatibility.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Inductance | 200µH |
| Turns Ratio (Primary:Secondary) | 1:1 |
| ET (Volt-Time Product) | 6VµS |
| Mounting Type | Surface Mount |
| Package Dimensions | 0.375" L x 0.354" W (9.52mm x 9.00mm) |
| Height - Seated (Max) | 0.250" (6.35mm) |
| Operating Temperature Range | 0°C to 70°C |
| Transformer Type | General Purpose |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution eligibility for the 78601/3MC-R is determined by the following critical parameters:
- Inductance Value: The substitute must support the required inductance specification. The 78601/3MC-R operates at 200µH.
- Turns Ratio: The substitute must maintain 1:1 primary-to-secondary turns ratio for circuit compatibility.
- ET Rating: The substitute must support the 6VµS volt-time product specification.
- Mounting Type: The substitute must be surface mount to maintain PCB layout compatibility.
- Package Footprint: The substitute must fit within the specified dimensions (0.375" L x 0.354" W, 9.52mm x 9.00mm) and height (0.250" max seated height).
- Operating Temperature: The substitute must support the 0°C to 70°C operating range.
The 78601/3JC-R is listed as a manufacturer-recommended substitute. However, this part operates at 150µH inductance, which differs from the 200µH specification of the primary part. This inductance difference represents a functional change and requires circuit-level evaluation before substitution.
Parameter Comparison
| Parameter | 78601/3MC-R (Main Part) | 78601/3JC-R (Substitute) |
|---|---|---|
| Manufacturer | Murata Power Solutions Inc. | Murata Power Solutions Inc. |
| Inductance | 200µH | 150µH |
| Turns Ratio (Primary:Secondary) | 1:1 | 1:1 |
| ET (Volt-Time Product) | 6VµS | 6VµS |
| Transformer Type | General Purpose | General Purpose |
| Mounting Type | Surface Mount | Surface Mount |
| Package Dimensions | 0.375" L x 0.354" W (9.52mm x 9.00mm) | 0.375" L x 0.354" W (9.52mm x 9.00mm) |
| Height - Seated (Max) | 0.250" (6.35mm) | 0.250" (6.35mm) |
| Operating Temperature Range | 0°C to 70°C | 0°C to 70°C |
| Product Status | Not For New Designs | Active |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) | 1 (Unlimited) |
Engineering Selection Recommendations
The 78601/3JC-R is the manufacturer-recommended substitute for the 78601/3MC-R. Both components share identical mechanical packaging, mounting type, footprint dimensions, and environmental specifications. Both maintain ROHS3 compliance and MSL 1 rating.
The primary distinction between these parts is the inductance specification: 200µH for the 78601/3MC-R versus 150µH for the 78601/3JC-R. This 25% inductance reduction affects circuit performance and must be evaluated within the specific application context.
The 78601/3JC-R carries an "Active" product status, indicating ongoing manufacturer support and availability, whereas the 78601/3MC-R is designated "Not For New Designs." This status difference supports the use of 78601/3JC-R for new applications and ongoing production requirements.
Frequently Asked Questions (FAQ)
Q: Can the 78601/3JC-R directly replace the 78601/3MC-R in existing designs?
A: Physical and mechanical compatibility is confirmed. Both parts share identical surface mount packaging, footprint dimensions (0.375" L x 0.354" W), and height specifications (0.250" max). However, the inductance difference (150µH versus 200µH) requires circuit-level evaluation to confirm functional compatibility with the application's pulse transformation requirements.
Q: What is the significance of the "Not For New Designs" status on the 78601/3MC-R?
A: This designation indicates the part has been superseded in the manufacturer's product line. The 78601/3JC-R, with "Active" status, represents the current recommended solution. New designs should incorporate the active substitute part.
Q: Are both parts RoHS compliant?
A: Yes. Both the 78601/3MC-R and 78601/3JC-R are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating, meeting current environmental and reliability standards.
Q: Do the parts share the same ET (Volt-Time) rating?
A: Yes. Both components specify 6VµS ET rating, indicating equivalent volt-time product performance despite the inductance difference.
Q: What is the operational temperature range for both parts?
A: Both the 78601/3MC-R and 78601/3JC-R operate across the 0°C to 70°C temperature range, providing identical thermal performance specifications.
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