SFH6345-X019T Equivalent & Substitute Parts

Part Overview

The SFH6345-X019T is an optoisolator transistor output device manufactured by Vishay Semiconductor Opto Division. This 8-SMD surface mount component provides 5300Vrms isolation with a single channel transistor output configuration. The part is currently active in production with full RoHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, procurement lead times, or design flexibility needs.

Key Parameters

Parameter	Value
Manufacturer Part Number	SFH6345-X019T
Manufacturer	Vishay Semiconductor Opto Division
Category	Optoisolators
Voltage - Isolation	5300Vrms
Number of Channels	1
Output Type	Transistor
Current Transfer Ratio (Min)	19% @ 16mA
Voltage - Output (Max)	25V
Current - Output / Channel	8mA
Operating Temperature	-55°C ~ 100°C
Package / Case	8-SMD, Gull Wing
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the SFH6345-X019T are classified into two categories based on electrical and mechanical compatibility:

Parametric Equivalents (Vishay SFH6345 Series): Parts SFH6345-X007T, SFH6345-X009T, and SFH6345-X017T share identical electrical specifications with the main part, including 5300Vrms isolation voltage, 19% minimum current transfer ratio at 16mA, 25V maximum output voltage, and 8mA output current per channel. These parts differ only in packaging format (Tape & Reel versus Cut Tape & Digi-Reel) and inventory availability. All maintain the same 8-SMD Gull Wing package configuration and operating temperature range of -55°C to 100°C.

Manufacturer Recommended Alternatives: Parts 6N135SMT&R, 6N136SMT&R (Isocom Components), and HCPL-4504#300 (Broadcom Limited) provide functional substitution with allowable parameter variations. These alternatives maintain single-channel transistor output configuration, 8-SMD surface mount packaging, and -55°C to 100°C operating temperature range. Isolation voltage ranges from 5000Vrms to 3750Vrms, and current transfer ratios range from 7% to 60% at 16mA, accommodating broader design flexibility.

Parameter Comparison

Parameter	SFH6345-X019T	SFH6345-X007T	SFH6345-X009T	SFH6345-X017T	6N135SMT&R	6N136SMT&R	HCPL-4504#300
Manufacturer	Vishay	Vishay	Vishay	Vishay	Isocom	Isocom	Broadcom
Voltage - Isolation	5300Vrms	5300Vrms	5300Vrms	5300Vrms	5000Vrms	5000Vrms	3750Vrms
Number of Channels	1	1	1	1	1	1	1
Output Type	Transistor	Transistor	Transistor	Transistor	Transistor with Base	Transistor with Base	Transistor
Current Transfer Ratio (Min)	19% @ 16mA	19% @ 16mA	19% @ 16mA	19% @ 16mA	7% @ 16mA	19% @ 16mA	25% @ 16mA
Voltage - Output (Max)	25V	25V	25V	25V	20V	20V	20V
Current - Output / Channel	8mA	8mA	8mA	8mA	8mA	8mA	8mA
Voltage - Forward (Vf) (Typ)	1.33V	1.33V	1.33V	1.33V	1.45V	1.45V	1.5V
Current - DC Forward (If) (Max)	25mA	25mA	25mA	25mA	25mA	25mA	25mA
Operating Temperature	-55°C ~ 100°C	-55°C ~ 100°C	-55°C ~ 100°C	-55°C ~ 100°C	-55°C ~ 100°C	-55°C ~ 100°C	-55°C ~ 100°C
Package / Case	8-SMD, Gull Wing	8-SMD, Gull Wing	8-SMD, Gull Wing	8-SMD, Gull Wing	8-SMD, Gull Wing	8-SMD, Gull Wing	8-SMD, Gull Wing
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

First Priority - Parametric Equivalents: SFH6345-X007T, SFH6345-X009T, and SFH6345-X017T are direct functional replacements with identical electrical specifications. Selection among these three depends on packaging requirements: SFH6345-X019T and SFH6345-X007T and SFH6345-X009T are supplied in Tape & Reel format, while SFH6345-X017T is supplied in Cut Tape & Digi-Reel format. All three maintain ROHS3 compliance and unlimited moisture sensitivity rating.

Secondary Priority - Manufacturer Recommended Alternatives: The 6N136SMT&R (Isocom Components) provides the closest functional match among cross-manufacturer alternatives, maintaining 19% minimum current transfer ratio at 16mA and ROHS3 compliance. The 6N135SMT&R offers lower minimum current transfer ratio (7%) and requires design verification for applications sensitive to current transfer ratio variation. The HCPL-4504#300 (Broadcom Limited) operates at reduced isolation voltage (3750Vrms versus 5300Vrms) and carries RoHS non-compliance status, limiting its use to applications without RoHS requirements.

Frequently Asked Questions (FAQ)

Q: Can SFH6345-X007T, SFH6345-X009T, and SFH6345-X017T be used interchangeably with SFH6345-X019T?

A: Yes. These parts share identical electrical specifications including isolation voltage (5300Vrms), current transfer ratio (19% minimum at 16mA), output voltage (25V maximum), and output current (8mA). Differences exist only in packaging format and supplier reel configuration. PCB layout and circuit design require no modification.

Q: What are the key differences between Vishay SFH6345 variants and Isocom 6N135/6N136 alternatives?

A: Vishay SFH6345 parts maintain 5300Vrms isolation voltage and 19% minimum current transfer ratio. Isocom 6N135SMT&R operates at 5000Vrms isolation with 7% to 50% current transfer ratio range. Isocom 6N136SMT&R matches the 19% minimum current transfer ratio but at 5000Vrms isolation. Both Isocom parts feature transistor output with base connection, providing additional design flexibility. All maintain 8-SMD Gull Wing packaging and -55°C to 100°C operating temperature.

Q: Is HCPL-4504#300 suitable as a substitute for SFH6345-X019T?

A: HCPL-4504#300 provides functional substitution for applications where 3750Vrms isolation voltage is acceptable. This part operates at lower isolation voltage than the SFH6345-X019T (3750Vrms versus 5300Vrms) and carries RoHS non-compliance status. Circuit design modifications may be required to accommodate reduced isolation voltage specifications. Use is restricted to applications without RoHS compliance mandates.

Q: What packaging formats are available for SFH6345 optoisolators?

A: SFH6345-X019T, SFH6345-X007T, and SFH6345-X009T are supplied in Tape & Reel (TR) format. SFH6345-X017T is supplied in Cut Tape (CT) & Digi-Reel format. All variants use identical 8-SMD Gull Wing package configuration. Selection depends on assembly equipment compatibility and procurement volume requirements.

Q: Are all substitute parts RoHS compliant?

A: SFH6345-X019T, SFH6345-X007T, SFH6345-X009T, SFH6345-X017T, 6N135SMT&R, and 6N136SMT&R maintain ROHS3 compliance. HCPL-4504#300 is RoHS non-compliant. Applications requiring RoHS certification must exclude HCPL-4504#300 from component selection.

Q: What is the moisture sensitivity level for these optoisolators?

A: All listed parts carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions. Standard storage and handling procedures apply without special moisture control requirements.

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