LTV-3150 Equivalent & Substitute Parts

Part Overview

The LTV-3150 is a 1-ampere gate driver optical coupler manufactured by Lite-On Inc., providing 5000Vrms isolation in an 8-DIP through-hole package. This component is designed for high-voltage gate drive applications requiring galvanic isolation between control and power circuits. The part is currently active in production with 3078 units in stock. Substitute parts are necessary when addressing specific application requirements such as higher output current capability, improved propagation delay characteristics, surface-mount packaging alternatives, or automotive-grade qualifications.

Key Parameters

Parameter	LTV-3150 Specification
Manufacturer	Lite-On Inc.
Isolation Voltage	5000Vrms
Number of Channels	1
Peak Output Current	1A
Output High/Low Current	800mA / 800mA
Common Mode Transient Immunity	15kV/µs
Propagation Delay (tpLH / tpHL)	400ns / 400ns
Pulse Width Distortion	120ns
Rise / Fall Time	42ns / 50ns
Output Supply Voltage	15V ~ 30V
Operating Temperature	-40°C ~ 105°C
Package / Case	8-DIP (0.300", 7.62mm)
Mounting Type	Through Hole
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the LTV-3150 is determined by the following critical parameters:

Mandatory Compatibility Criteria:

Isolation voltage rating (5000Vrms minimum for direct substitution)
Single-channel configuration
Output supply voltage range (15V ~ 30V)
Through-hole 8-DIP package form factor (for pin-compatible replacement)
Optical coupling technology

Performance Variation Allowances:

Peak output current (1A baseline; higher ratings acceptable for increased drive capability)
Propagation delay (400ns baseline; variations acceptable depending on timing requirements)
Common mode transient immunity (15kV/µs baseline; higher ratings acceptable)
Operating temperature range (may vary; -40°C ~ 100°C or -40°C ~ 125°C acceptable)

Substitution Categories:

Category A - Direct Pin-Compatible Replacements (5000Vrms isolation, through-hole 8-DIP):

ACNW3190-000E (Broadcom): 5A output, 500ns propagation delay, 8-DIP 0.400" package
FOD3150TSR2V (onsemi): 1.5A output, 500ns propagation delay, surface-mount alternative

Category B - Reduced Isolation Voltage (3750Vrms isolation, through-hole 8-DIP):

ACPL-312T-000E (Broadcom): 2.5A output, automotive-grade, AEC-Q100 qualified
ACPL-312U-000E (Broadcom): 2.5A output, automotive-grade, AEC-Q100 qualified
ACPL-3130-000E (Broadcom): 2.5A output, 40kV/µs CMTI
ACPL-T350-000E (Broadcom): 2.5A output, 15ns/20ns rise/fall time
HCPL-3120 (Broadcom): 2.5A output, standard industrial grade
HCPL-3120#060 (Broadcom): 2.5A output, IEC/EN/DIN certified
HCPL-3120-000E (Broadcom): 2.5A output, ROHS3 compliant
HCPL-3120-060E (Broadcom): 2.5A output, IEC/EN/DIN certified, ROHS3 compliant

Parameter Comparison

Part Number	Manufacturer	Isolation Voltage	Peak Output Current	Output High/Low	Propagation Delay (Max)	CMTI (Min)	PWD (Max)	Rise/Fall Time	Package	Mounting	Temp Range	RoHS Status
LTV-3150	Lite-On Inc.	5000Vrms	1A	800mA / 800mA	400ns	15kV/µs	120ns	42ns / 50ns	8-DIP (0.300")	Through Hole	-40°C ~ 105°C	ROHS3
ACNW3190-000E	Broadcom	5000Vrms	5A	4A / 4A	500ns	15kV/µs	300ns	100ns / 100ns	8-DIP (0.400")	Through Hole	-40°C ~ 100°C	ROHS3
ACPL-312T-000E	Broadcom	3750Vrms	2.5A	2A / 2A	500ns	25kV/µs	300ns	100ns / 100ns	8-DIP (0.300")	Through Hole	-40°C ~ 125°C	ROHS3
ACPL-312U-000E	Broadcom	3750Vrms	2.5A	2A / 2A	500ns	25kV/µs	300ns	100ns / 100ns	8-DIP (0.300")	Through Hole	-40°C ~ 125°C	ROHS3
ACPL-3130-000E	Broadcom	3750Vrms	2.5A	2A / 2A	500ns	40kV/µs	300ns	100ns / 100ns	8-DIP (0.300")	Through Hole	-40°C ~ 100°C	ROHS3
ACPL-T350-000E	Broadcom	3750Vrms	2.5A	2A / 2A	500ns	15kV/µs	300ns	15ns / 20ns	8-DIP (0.300")	Through Hole	-40°C ~ 100°C	ROHS3
FOD3150TSR2V	onsemi	5000Vrms	1.5A	1A / 1A	500ns	20kV/µs	300ns	60ns / 60ns	8-SMD	Surface Mount	-40°C ~ 100°C	ROHS3
HCPL-3120-000E	Broadcom	3750Vrms	2.5A	2A / 2A	500ns	25kV/µs	300ns	100ns / 100ns	8-DIP (0.300")	Through Hole	-40°C ~ 100°C	ROHS3
HCPL-3120-060E	Broadcom	3750Vrms	2.5A	2A / 2A	500ns	25kV/µs	300ns	100ns / 100ns	8-DIP (0.300")	Through Hole	-40°C ~ 100°C	ROHS3

Engineering Selection Recommendations

For 5000Vrms Isolation Requirement (Direct Voltage Equivalent):

ACNW3190-000E is the primary substitute when 5000Vrms isolation must be maintained. This part provides higher output current capability (5A peak versus 1A), making it suitable for applications requiring increased gate drive strength. The package footprint differs (0.400" versus 0.300"), requiring PCB layout modification. Operating temperature range is reduced to -40°C ~ 100°C. ROHS3 compliance and CSA/IEC/EN/DIN/UR certifications are maintained.

FOD3150TSR2V provides 5000Vrms isolation with surface-mount packaging, suitable for modern PCB assembly processes. Output current is 1.5A peak, slightly exceeding the LTV-3150. This part is ROHS3 compliant with IEC and UL approvals. Surface-mount form factor eliminates through-hole assembly requirements.

For 3750Vrms Isolation (Reduced Voltage Applications):

ACPL-312T-000E and ACPL-312U-000E are automotive-grade alternatives with AEC-Q100 qualification, suitable for automotive and industrial applications requiring extended temperature operation (-40°C ~ 125°C). Both provide 2.5A peak output current and maintain the 8-DIP (0.300") package footprint. ROHS3 compliance and REACH unaffected status are confirmed.

ACPL-3130-000E offers enhanced common mode transient immunity (40kV/µs versus 15kV/µs), beneficial for high-dV/dt switching environments. ROHS3 compliant with CSA and UR approvals.

ACPL-T350-000E provides the fastest rise and fall times (15ns/20ns) among 3750Vrms alternatives, optimizing gate drive edge rates. ROHS3 compliant with CSA and UR approvals.

HCPL-3120-000E and HCPL-3120-060E are industrial-grade alternatives with 25kV/µs CMTI and 2.5A output current. HCPL-3120-060E includes IEC/EN/DIN certification. Both maintain 8-DIP (0.300") package compatibility and ROHS3 compliance.

Compliance and Certification Considerations:

All recommended substitutes maintain ROHS3 compliance. Automotive applications should prioritize ACPL-312T-000E or ACPL-312U-000E due to AEC-Q100 qualification. Industrial applications with high common-mode transient requirements should consider ACPL-3130-000E. Applications requiring IEC/EN/DIN certification should select HCPL-3120-060E or ACPL-312T-000E.

Frequently Asked Questions (FAQ)

Q: Can ACNW3190-000E directly replace LTV-3150 on existing PCBs?

A: ACNW3190-000E maintains 5000Vrms isolation and 8-DIP through-hole mounting but has a different package body width (0.400" versus 0.300"). Pin spacing remains compatible, but PCB layout modification may be required to accommodate the larger package body. Electrical functionality is compatible.

Q: What is the primary difference between 5000Vrms and 3750Vrms isolation options?

A: The LTV-3150 provides 5000Vrms isolation, suitable for high-voltage applications requiring maximum galvanic separation. Substitutes with 3750Vrms isolation (ACPL series, HCPL series) are suitable for applications where lower isolation voltage is acceptable. Selection depends on system voltage requirements and safety standards applicable to the end application.

Q: Are ACPL-312T-000E and ACPL-312U-000E interchangeable?

A: Both parts are automotive-grade with AEC-Q100 qualification, 3750Vrms isolation, 2.5A output current, and 8-DIP (0.300") packaging. The primary difference is DC forward current specification: ACPL-312T-000E is rated at 25mA maximum, while ACPL-312U-000E is rated at 20mA maximum. They are functionally interchangeable in most applications.

Q: Why does FOD3150TSR2V use surface-mount packaging?

A: FOD3150TSR2V is designed for modern surface-mount assembly processes, eliminating through-hole drilling and wave soldering requirements. This part maintains 5000Vrms isolation and 1.5A output current comparable to LTV-3150. Selection depends on PCB assembly capability and manufacturing process requirements.

Q: Which substitute offers the fastest propagation delay?

A: LTV-3150 specifies 400ns maximum propagation delay. All listed substitutes specify 500ns maximum propagation delay, representing a 100ns increase. For applications requiring faster response, ACPL-T350-000E offers the fastest rise and fall times (15ns/20ns) among available alternatives, though propagation delay remains at 500ns.

Q: Is HCPL-3120 RoHS compliant?

A: HCPL-3120 (base part number) is listed as RoHS non-compliant. HCPL-3120-000E and HCPL-3120-060E are ROHS3 compliant variants. For new designs, ROHS3 compliant versions should be specified.

Q: What is the significance of CMTI (Common Mode Transient Immunity) differences?

A: CMTI rating indicates the maximum rate of voltage change the coupler can tolerate without false triggering. LTV-3150 specifies 15kV/µs. Higher CMTI ratings (25kV/µs for ACPL-312 series, 40kV/µs for ACPL-3130-000E) provide improved noise immunity in high-dV/dt switching environments such as power converters and motor drives.

Q: Can 3750Vrms parts be used in 5000Vrms applications?

A: No. Isolation voltage rating must meet or exceed system requirements. Using 3750Vrms parts in 5000Vrms applications violates safety and regulatory requirements. Only ACNW3190-000E and FOD3150TSR2V maintain 5000Vrms isolation for direct voltage-equivalent substitution.

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