FOD8318R2 Equivalent & Substitute Parts

Part Overview

The FOD8318R2 is a 3A gate driver optical coupler manufactured by onsemi, featuring 4243Vrms isolation voltage and single-channel configuration in a 16-SO surface mount package. This component is designed for high-voltage gate drive applications requiring galvanic isolation. The part maintains active product status with full RoHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified based on functional equivalence in gate driver topology, isolation voltage capability, channel configuration, and package compatibility.

Key Parameters

Parameter	FOD8318R2
Manufacturer	onsemi
Technology	Optical Coupling
Number of Channels	1
Voltage - Isolation	4243Vrms
Current - Peak Output	3A
Voltage - Output Supply	15V ~ 30V
Package / Case	16-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount
Operating Temperature	-40°C ~ 100°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the FOD8318R2 is determined by the following critical parameters:

Isolation Voltage: Substitute parts must provide isolation voltage equal to or greater than 4243Vrms
Channel Configuration: Single-channel topology required
Package Type: 16-SO or 16-SOIC surface mount package
Output Current Capability: Peak output current of 3A or higher
Output Supply Voltage Range: Compatibility with 15V ~ 30V supply envelope
Technology: Optical coupling gate driver architecture
Product Status: Active status with current manufacturing support
Compliance: RoHS3 compliance and equivalent regulatory approvals

The three identified substitute parts (ACPL-302J-000E, ACPL-336J-000E, ACPL-337J-000E) from Broadcom Limited meet these substitution criteria with enhanced isolation voltage (5000Vrms) and maintained or improved electrical performance characteristics.

Parameter Comparison

Parameter	FOD8318R2	ACPL-302J-000E	ACPL-336J-000E	ACPL-337J-000E
Manufacturer	onsemi	Broadcom Limited	Broadcom Limited	Broadcom Limited
Technology	Optical Coupling	Optical Coupling	Optical Coupling	Optical Coupling
Number of Channels	1	1	1	1
Voltage - Isolation	4243Vrms	5000Vrms	5000Vrms	5000Vrms
Common Mode Transient Immunity (Min)	35kV/µs	30kV/µs	30kV/µs	30kV/µs
Propagation Delay tpLH (Max)	500ns	250ns	220ns	220ns
Propagation Delay tpHL (Max)	500ns	250ns	250ns	250ns
Pulse Width Distortion (Max)	300ns	140ns	120ns	120ns
Current - Output High	2.5A	750mA	2A	3A
Current - Output Low	2.5A	1A	2A	3A
Current - Peak Output	3A	2.5A	2.5A	4A
Voltage - Output Supply	15V ~ 30V	18V ~ 22V	15V ~ 30V	15V ~ 30V
Operating Temperature	-40°C ~ 100°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C
Package / Case	16-SOIC (0.295", 7.50mm Width)	16-SOIC (0.295", 7.50mm Width)	16-SOIC (0.295", 7.50mm Width)	16-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active	Active

Engineering Selection Recommendations

ACPL-337J-000E is the primary substitute for FOD8318R2 applications. This part provides 5000Vrms isolation voltage (exceeding the 4243Vrms requirement), 4A peak output current (matching the 3A specification), and maintains the 15V ~ 30V output supply range. The ACPL-337J-000E demonstrates improved propagation delay characteristics (220ns versus 500ns) and reduced pulse width distortion (120ns versus 300ns). All parts maintain RoHS3 compliance, unlimited MSL rating, and active product status with equivalent regulatory approvals (CSA, IEC/EN/DIN, UR).

ACPL-336J-000E serves as an alternative substitute with 5000Vrms isolation and 2.5A peak output current. This part maintains full compatibility with the 15V ~ 30V supply range and offers improved timing performance. The 2.5A peak output current remains within acceptable margins for applications not requiring the full 3A specification.

ACPL-302J-000E is suitable only for applications with relaxed output current requirements (2.5A peak) and output supply voltage constrained to 18V ~ 22V. The reduced output supply range limits applicability to designs with fixed 20V nominal supplies.

Frequently Asked Questions (FAQ)

Q: Can ACPL-302J-000E replace FOD8318R2 in all applications?

A: No. ACPL-302J-000E operates within 18V ~ 22V output supply range, whereas FOD8318R2 supports 15V ~ 30V. Applications requiring supply voltages outside the 18V ~ 22V window are incompatible with ACPL-302J-000E.

Q: What is the isolation voltage difference between FOD8318R2 and the substitute parts?

A: FOD8318R2 provides 4243Vrms isolation. All three substitute parts (ACPL-302J-000E, ACPL-336J-000E, ACPL-337J-000E) provide 5000Vrms isolation, representing a 757Vrms increase. Higher isolation voltage does not degrade performance in applications designed for lower isolation requirements.

Q: Are the 16-SO and 16-SOIC packages pin-compatible?

A: Yes. Both FOD8318R2 (16-SO) and the substitute parts (16-SOIC) share identical 0.295" (7.50mm) width and pin configuration, enabling direct PCB layout compatibility without redesign.

Q: Which substitute part best matches FOD8318R2 output current capability?

A: ACPL-337J-000E provides 4A peak output current, exceeding the FOD8318R2 specification of 3A. ACPL-336J-000E provides 2.5A peak output current, which is lower than FOD8318R2. ACPL-302J-000E also provides 2.5A peak output current with additional supply voltage constraints.

Q: Do all substitute parts maintain the same operating temperature range?

A: FOD8318R2 operates -40°C ~ 100°C. All substitute parts operate -40°C ~ 105°C, providing 5°C extended upper temperature capability.

Q: What compliance certifications apply to these parts?

A: FOD8318R2 carries UL approval. All substitute parts carry CSA, IEC/EN/DIN, and UR approvals. All parts maintain RoHS3 compliance and REACH unaffected status.

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