VO4258M-X007T Equivalent & Substitute Parts

Part Overview

The VO4258M-X007T is an optoisolator with triac output manufactured by Vishay Semiconductor Opto Division. This single-channel device provides 5300Vrms isolation voltage and is designed for applications requiring galvanic isolation with triac switching capability. The part is active and in production. Substitute parts may be required due to inventory availability, packaging preferences, or specific application requirements within the allowed electrical and mechanical parameter ranges.

Key Parameters

Parameter	VO4258M-X007T
Manufacturer	Vishay Semiconductor Opto Division
Category	Optoisolators
Output Type	Triac
Number of Channels	1
Voltage - Isolation	5300Vrms
Voltage - Off State	800 V
Static dV/dt (Min)	5kV/µs
Current - LED Trigger (Ift) (Max)	3mA
Current - On State (It (RMS)) (Max)	300 mA
Voltage - Forward (Vf) (Typ)	1.2V
Current - DC Forward (If) (Max)	60 mA
Operating Temperature	-55°C ~ 100°C
Mounting Type	Surface Mount
Package / Case	6-SMD, Gull Wing
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for the VO4258M-X007T are qualified based on the following criteria:

Output Type: Triac (single channel)
Mounting Type: Surface Mount, 6-SMD, Gull Wing package
Operating Temperature Range: -55°C ~ 100°C
Isolation Voltage: Minimum 5000Vrms (VO4258M-X007T specifies 5300Vrms)
Off State Voltage: 800 V
RoHS3 Compliance
MSL Rating: 1 (Unlimited)

The substitute parts listed below meet these core electrical and mechanical requirements. All substitutes are manufactured by onsemi and maintain compatibility with the same package footprint and thermal operating range.

Parameter Comparison

Parameter	VO4258M-X007T	FOD4208S	FOD4208SD	FOD4218S	FOD4218SD
Manufacturer	Vishay	onsemi	onsemi	onsemi	onsemi
Voltage - Isolation	5300Vrms	5000Vrms	5000Vrms	5000Vrms	5000Vrms
Voltage - Off State	800 V	800 V	800 V	800 V	800 V
Static dV/dt (Min)	5kV/µs	10kV/µs	10kV/µs	10kV/µs	10kV/µs
Current - LED Trigger (Ift) (Max)	3mA	2mA	2mA	1.3mA	1.3mA
Current - On State (It (RMS)) (Max)	300 mA	Not specified	Not specified	Not specified	Not specified
Current - Hold (Ih)	Not specified	500µA	500µA	500µA	500µA
Turn On Time	Not specified	60µs	60µs	60µs	60µs
Voltage - Forward (Vf) (Typ)	1.2V	1.28V	1.28V	1.28V	1.28V
Current - DC Forward (If) (Max)	60 mA	30 mA	30 mA	30 mA	30 mA
Operating Temperature	-55°C ~ 100°C	-55°C ~ 100°C	-55°C ~ 100°C	-55°C ~ 100°C	-55°C ~ 100°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	6-SMD, Gull Wing	6-SMD, Gull Wing	6-SMD, Gull Wing	6-SMD, Gull Wing	6-SMD, Gull Wing
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active	Active	Active
Packaging Format	Tape & Reel (TR)	Tube	Cut Tape (CT) & Digi-Reel®	Bulk	Tape & Reel (TR)

Engineering Selection Recommendations

All substitute parts listed are active products with ROHS3 compliance and MSL 1 rating, matching the environmental and regulatory requirements of the VO4258M-X007T. The onsemi FOD series substitutes maintain the same 6-SMD gull wing package footprint and operating temperature range.

Selection between substitute parts should be based on packaging format availability and inventory requirements:

FOD4208S: Tube packaging
FOD4208SD: Cut Tape and Digi-Reel packaging
FOD4218S: Bulk packaging
FOD4218SD: Tape & Reel packaging (matches VO4258M-X007T packaging format)

All substitute parts carry equivalent regulatory approvals (cUL, FIMKO, UL) suitable for industrial applications.

Frequently Asked Questions (FAQ)

Q: Can FOD4208S, FOD4208SD, FOD4218S, and FOD4218SD be used interchangeably with VO4258M-X007T?

A: These parts share the same triac output topology, single-channel configuration, 6-SMD gull wing package, and operating temperature range. The isolation voltage of substitute parts (5000Vrms) is lower than the VO4258M-X007T (5300Vrms). Substitution is valid only if the application isolation voltage requirement does not exceed 5000Vrms.

Q: What are the differences in LED trigger current between the main part and substitutes?

A: The VO4258M-X007T specifies a maximum LED trigger current (Ift) of 3mA. The FOD4208 series specifies 2mA maximum, and the FOD4218 series specifies 1.3mA maximum. Lower trigger current requirements in substitutes may reduce input circuit power consumption.

Q: Does packaging format affect electrical performance?

A: No. Packaging format (Tube, Cut Tape, Bulk, or Tape & Reel) does not affect electrical performance. Selection should be based on assembly process requirements and inventory management practices.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the environmental compliance of the VO4258M-X007T.

Q: What is the significance of the higher static dV/dt rating in substitute parts?

A: The FOD series substitutes specify a minimum static dV/dt of 10kV/µs, compared to 5kV/µs for the VO4258M-X007T. A higher dV/dt rating indicates improved noise immunity and faster transient response capability.

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