VO4158D-X007T Equivalent & Substitute Parts

Part Overview

The VO4158D-X007T is a high-voltage optoisolator with triac output manufactured by Vishay Semiconductor Opto Division. This component features 5300Vrms isolation voltage, zero-crossing detection, and is rated for 1 channel operation in a 6-SMD surface mount package. The part is currently obsolete, making equivalent substitute components necessary for new designs and ongoing production requirements.

Key Parameters

Parameter	VO4158D-X007T
Manufacturer	Vishay Semiconductor Opto Division
Category	Optoisolators
Output Type	Triac
Voltage - Isolation	5300Vrms
Voltage - Off State	800 V
Zero Crossing Circuit	Yes
Number of Channels	1
Static dV/dt (Min)	5kV/µs
Current - LED Trigger (Ift) (Max)	1.6mA
Current - On State (It (RMS)) (Max)	300 mA
Current - Hold (Ih)	500µA
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
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Approval Agency	cUR, FIMKO, UR

Substitute Part Grouping Explanation

Substitute optoisolators for the VO4158D-X007T are selected based on the following critical parameters:

Output Type: Triac output configuration
Zero Crossing Circuit: Presence of zero-crossing detection
Number of Channels: Single channel operation
Package / Case: 6-SMD, Gull Wing surface mount
Voltage - Isolation: Minimum 4170Vrms (lower than original 5300Vrms but within acceptable substitution range for this product category)
Voltage - Off State: 800 V
Current - Hold (Ih): 500µA typical
Voltage - Forward (Vf): 1.3V typical
Current - DC Forward (If): 60 mA maximum
RoHS Compliance: ROHS3 Compliant

All substitute parts maintain triac output functionality, zero-crossing detection, single-channel configuration, and identical 6-SMD gull wing packaging. The MOC308 series substitutes operate at 4170Vrms isolation voltage with active product status and UL approval certification.

Parameter Comparison

Parameter	VO4158D-X007T	MOC3081SM	MOC3081SR2M	MOC3082SM	MOC3082SR2M	MOC3083SM	MOC3083SR2M
Manufacturer	Vishay	onsemi	Fairchild	Fairchild	onsemi	Fairchild	onsemi
Output Type	Triac	Triac	Triac	Triac	Triac	Triac	Triac
Voltage - Isolation	5300Vrms	4170Vrms	4170Vrms	4170Vrms	4170Vrms	4170Vrms	4170Vrms
Voltage - Off State	800 V	800 V	800 V	800 V	800 V	800 V	800 V
Zero Crossing Circuit	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Number of Channels	1	1	1	1	1	1	1
Static dV/dt (Min)	5kV/µs	600V/µs	600V/µs	600V/µs	600V/µs	600V/µs	600V/µs
Current - LED Trigger (Ift) (Max)	1.6mA	15mA	15mA	10mA	10mA	5mA	5mA
Current - Hold (Ih)	500µA	500µA (Typ)	500µA (Typ)	500µA (Typ)	500µA (Typ)	500µA (Typ)	500µA (Typ)
Voltage - Forward (Vf) (Typ)	1.2V	1.3V	1.3V	1.3V	1.3V	1.3V	1.3V
Current - DC Forward (If) (Max)	60 mA	60 mA	60 mA	60 mA	60 mA	60 mA	60 mA
Operating Temperature	-55°C ~ 100°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	6-SMD, Gull Wing	6-SMD, Gull Wing	6-SMD, Gull Wing	6-SMD, Gull Wing	6-SMD, Gull Wing	6-SMD, Gull Wing	6-SMD, Gull Wing
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Not specified	Not specified	ROHS3 Compliant	Not specified	ROHS3 Compliant
Approval Agency	cUR, FIMKO, UR	UL	UL	UL	UL	UL	UL

Engineering Selection Recommendations

All substitute parts listed are active products with UL approval certification, providing long-term availability and regulatory compliance for production environments. The MOC308 series substitutes operate at 4170Vrms isolation voltage, which is lower than the original VO4158D-X007T specification of 5300Vrms. Circuit designs must accommodate this reduced isolation rating.

The MOC3083 variants (MOC3083SM and MOC3083SR2M) feature the lowest LED trigger current specification at 5mA maximum, offering improved input sensitivity. The MOC3082 variants (MOC3082SM and MOC3082SR2M) provide intermediate trigger current at 10mA maximum. The MOC3081 variants (MOC3081SM and MOC3081SR2M) specify 15mA maximum trigger current.

All substitute parts maintain identical 800V off-state voltage, 500µA hold current, 1.3V typical forward voltage, and 60mA maximum DC forward current. Operating temperature range for substitutes is -40°C to 85°C, which is narrower than the original part's -55°C to 100°C range. Applications requiring extended temperature operation below -40°C or above 85°C require design review.

Frequently Asked Questions (FAQ)

Q: Can MOC308 series parts directly replace the VO4158D-X007T?

A: MOC308 series optoisolators are functionally compatible substitutes with identical triac output configuration, zero-crossing detection, single-channel operation, and 6-SMD gull wing packaging. The primary difference is reduced isolation voltage (4170Vrms versus 5300Vrms). Circuit designs must verify that the lower isolation rating meets application requirements.

Q: What is the difference between MOC3081, MOC3082, and MOC3083 variants?

A: The three variants differ in LED trigger current specification. MOC3081 specifies 15mA maximum, MOC3082 specifies 10mA maximum, and MOC3083 specifies 5mA maximum. Lower trigger current improves input sensitivity and reduces input circuit power consumption. Selection depends on input drive capability and power budget requirements.

Q: Are there packaging differences between substitute parts?

A: All substitute parts use identical 6-SMD gull wing surface mount packaging. Packaging options vary by manufacturer and distributor: MOC3081SM and MOC3082SM are supplied in bulk or tube packaging, MOC3081SR2M and MOC3082SR2M are supplied in bulk or tape & reel, MOC3083SM is supplied in bulk or tube, and MOC3083SR2M is supplied in cut tape and Digi-Reel format. PCB footprint compatibility is maintained across all variants.

Q: What is the operating temperature impact of substitution?

A: The VO4158D-X007T operates from -55°C to 100°C. All MOC308 series substitutes operate from -40°C to 85°C. Applications requiring operation below -40°C or above 85°C must implement design modifications or seek alternative components rated for extended temperature ranges.

Q: Do all substitute parts meet RoHS compliance?

A: MOC3082SR2M and MOC3083SR2M are specified as ROHS3 Compliant. MOC3081SM, MOC3081SR2M, MOC3082SM, and MOC3083SM do not have RoHS status specified in available documentation. Applications with RoHS compliance requirements should prioritize MOC3082SR2M or MOC3083SR2M.

Q: What certifications apply to substitute parts?

A: All MOC308 series substitutes carry UL approval certification. The original VO4158D-X007T carries cUR, FIMKO, and UR certifications. Applications requiring specific certification compliance should verify that UL approval meets regulatory requirements.

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