ASSR-302C-302E Equivalent & Substitute Parts

Part Overview

The ASSR-302C-302E is a Solid State SPST-NO (1 Form A) x 2 relay manufactured by Broadcom Limited in an 8-SMD (0.300", 7.62mm) surface mount package. This component is rated for 50 mA load current across 0-250V AC/DC output with a maximum on-state resistance of 50 Ohms and 1.3VDC input voltage. The product is currently obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications.

Substiute Parts

ASSR-302C-302E

Broadcom LimitedIn Stock: 667ASSR-302C-302E Datasheet

Current PartRFQ

ACPL-K308U-500E

Broadcom LimitedIn Stock: 3849ACPL-K308U-500E Datasheet

MFR RecommendedRFQ

OAA160

IXYS Integrated Circuits DivisionIn Stock: 2120OAA160 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the ASSR-302C-302E is determined by the following critical parameters:

• Circuit Configuration: SPST-NO (1 Form A) x 2 dual-channel relay function
• Load Voltage Range: 0-250V AC/DC capability
• Load Current Rating: 50 mA minimum
• Input Voltage: Approximately 1.3VDC (tolerance range acceptable)
• On-State Resistance: Maximum 50-100 Ohms acceptable for equivalent performance
• Mounting Compatibility: Surface mount or through-hole with equivalent footprint considerations
• Compliance: ROHS3 compliant, MSL 1 rating

Two substitute parts meet these criteria with documented compatibility:

OAA160 (IXYS Integrated Circuits Division) provides functional equivalence with identical circuit configuration, load voltage/current ratings, and ROHS3 compliance. The primary difference is through-hole mounting versus surface mount, requiring PCB layout adaptation.

ACPL-K308U-500E (Broadcom Limited) is a gate driver optical coupling device with different technology (optical isolation vs. solid-state relay) and single-channel configuration, suitable only for specific application contexts requiring isolation characteristics.

Parameter Comparison

Engineering Selection Recommendations

OAA160 is the primary functional equivalent for ASSR-302C-302E replacement. Both components maintain identical SPST-NO (1 Form A) x 2 circuit configuration, 50 mA load current capability, and 0-250V AC/DC voltage range. The OAA160 is currently in active production status with ROHS3 compliance and MSL 1 rating matching the original specification. The through-hole mounting requires PCB redesign compared to the surface mount ASSR-302C-302E, but electrical performance is equivalent. The OAA160 input voltage of 1.2VDC is compatible with the 1.3VDC specification within standard operating tolerances.

ACPL-K308U-500E is not a direct functional substitute. This component is a gate driver optical coupling device with single-channel configuration and different application context (5000Vrms isolation, gate drive function). Selection of ACPL-K308U-500E requires application-specific justification based on isolation or gate drive requirements not present in standard SPST-NO relay applications.

Frequently Asked Questions (FAQ)

Q: Can OAA160 directly replace ASSR-302C-302E on the same PCB?

A: No. ASSR-302C-302E uses surface mount 8-SMD packaging while OAA160 uses through-hole 8-DIP packaging. PCB layout modification is required, including pad pattern changes and potential trace routing adjustments. Electrical functionality is equivalent.

Q: What is the significance of the on-state resistance difference (50 Ohms vs. 100 Ohms)?

A: OAA160 has a maximum on-state resistance of 100 Ohms compared to ASSR-302C-302E at 50 Ohms. For 50 mA load current, this results in maximum voltage drop of 5V (OAA160) versus 2.5V (ASSR-302C-302E). Application thermal and power dissipation analysis is required to confirm acceptability.

Q: Are both substitute parts ROHS3 compliant?

A: Yes. Both OAA160 and ACPL-K308U-500E carry ROHS3 compliance certification matching the original ASSR-302C-302E specification.

Q: Why is ACPL-K308U-500E listed as a substitute if it has different functionality?

A: ACPL-K308U-500E is listed based on manufacturer documentation. However, it is a gate driver optical coupling device, not a solid-state relay. Direct substitution is not applicable for standard SPST-NO relay applications. Selection requires specific application requirements for isolation or gate drive functionality.

Q: What is the input voltage tolerance for OAA160 substitution?

A: OAA160 specifies 1.2VDC input voltage compared to ASSR-302C-302E at 1.3VDC. This 0.1VDC difference is within standard component operating tolerances and does not affect functional compatibility for typical control circuit applications.

Q: Are there package footprint compatibility considerations?

A: Yes. ASSR-302C-302E uses 8-SMD (0.300", 7.62mm) surface mount footprint. OAA160 uses 8-DIP (0.300", 7.62mm) through-hole footprint. While both share the 7.62mm body width, the mounting technology and pad patterns are incompatible without PCB redesign.