TE Connectivity Potter & Brumfield Relay 3-1393278-7 Equivalent & Substitute Parts

Part Overview

The TE Connectivity Potter & Brumfield 3-1393278-7 is an automotive SPDT relay rated for 45A at 24VDC with a non-latching coil configuration. This component is classified as obsolete, necessitating identification of active equivalent parts for continued system support and procurement. The relay operates across an industrial temperature range of -40°C to 105°C and features silver nickel contact material suitable for automotive switching applications.

Substiute Parts

3-1393278-7

TE Connectivity Potter & Brumfield RelaysIn Stock: 11043-1393278-7 Datasheet

Current PartRFQ

1393277-8

TE Connectivity Potter & Brumfield RelaysIn Stock: 647841393277-8 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 3-1393278-7 is determined by electrical and mechanical parameter equivalence across the following critical specifications:

Electrical Equivalence Criteria:

• Coil voltage: 24VDC
• Contact current rating: 45 A
• Contact form: SPDT (1 Form C)
• Coil type: Non Latching
• Coil current: 66 mA
• Switching voltage: 12VDC nominal
• Must operate voltage: 14.1 VDC
• Must release voltage: 2.4 VDC
• Operate time: 5 ms
• Release time: 3 ms
• Contact material: Silver Nickel (AgNi)
• Coil power: 1.6W
• Coil resistance: 362 Ohms

Mechanical Equivalence Criteria:

• Mounting type: Through Hole
• Termination style: PC Pin
• Moisture sensitivity level: 1 (Unlimited)

The substitute part 1393277-8 meets all electrical and mechanical equivalence requirements. The primary distinction is the operating temperature range and product status classification.

Parameter Comparison

Engineering Selection Recommendations

The TE Connectivity Potter & Brumfield 1393277-8 is the direct substitute for the obsolete 3-1393278-7. Both relays share identical electrical specifications and mechanical interfaces, ensuring functional compatibility in automotive switching applications.

Selection Basis:

The 1393277-8 is classified as an active product with current manufacturing support, whereas the 3-1393278-7 is obsolete. The substitute part carries ROHS3 compliance certification, meeting current regulatory requirements for electronic component procurement. The substitute features a fully sealed design, providing enhanced environmental protection in automotive applications.

The operating temperature range of the substitute part extends to 85°C maximum, compared to 105°C for the main part. Applications requiring operation above 85°C require evaluation against the substitute's thermal specifications.

Frequently Asked Questions (FAQ)

Q: Can the 1393277-8 directly replace the 3-1393278-7 in existing automotive circuits?

A: Yes. Both relays share identical coil voltage (24VDC), contact current rating (45A), contact form (SPDT), timing characteristics (5ms operate, 3ms release), and mechanical interfaces (through-hole PC pin termination). Electrical and mechanical compatibility is confirmed across all specified parameters.

Q: What is the primary difference between these two relay models?

A: The 1393277-8 is an active product with ROHS3 compliance and fully sealed construction, whereas the 3-1393278-7 is obsolete. The substitute operates to a maximum temperature of 85°C versus 105°C for the original part.

Q: Are there temperature limitations when substituting the 1393277-8 for the 3-1393278-7?

A: The 1393277-8 operates across -40°C to 85°C. Applications requiring sustained operation above 85°C must evaluate thermal performance against system requirements. The original part specification extends to 105°C.

Q: Does the fully sealed design of the 1393277-8 affect circuit performance?

A: No. The sealed construction provides enhanced environmental protection without altering electrical switching characteristics, coil impedance, or contact performance. All electrical parameters remain identical.

Q: What is the packaging difference between these parts?

A: The 3-1393278-7 packaging is not specified in available documentation. The 1393277-8 is supplied in bulk packaging. Confirm packaging requirements with procurement specifications.

Q: Are both relays compliant with automotive standards?

A: Both relays are classified as automotive components. The 1393277-8 carries ROHS3 compliance certification. Compliance with specific automotive standards (AEC-Q, ISO, etc.) requires review of complete technical documentation.

Q: Can the 1393277-8 be used in new designs replacing the obsolete 3-1393278-7?

A: Yes. The 1393277-8 is the active equivalent and is suitable for new designs. The active product status ensures continued availability and manufacturing support.