SFH6325 Equivalent & Substitute Parts

Part Overview

The SFH6325 is a 2-channel optoisolator with transistor output manufactured by Vishay Semiconductor Opto Division. It provides 5300Vrms isolation voltage and is designed for DC input applications requiring galvanic isolation. The part is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain compatibility across electrical isolation, channel configuration, output characteristics, and mechanical packaging.

Key Parameters

Parameter	SFH6325
Manufacturer	Vishay Semiconductor Opto Division
Number of Channels	2
Voltage - Isolation	5300Vrms
Current Transfer Ratio (Min)	7% @ 16mA
Turn On / Turn Off Time (Typ)	300ns, 600ns
Input Type	DC
Output Type	Transistor
Voltage - Output (Max)	25V
Current - Output / Channel	8mA
Voltage - Forward (Vf) (Typ)	1.33V
Current - DC Forward (If) (Max)	25mA
Operating Temperature	-55°C ~ 100°C
Mounting Type	Through Hole
Package / Case	8-DIP (0.300", 7.62mm)
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the SFH6325 is determined by the following critical parameters:

Isolation Voltage: Minimum 5000Vrms required to match or exceed the original 5300Vrms specification
Channel Configuration: Must be 2-channel transistor output
Package Type: 8-DIP (0.300", 7.62mm) through-hole mounting
Output Voltage Rating: Minimum 20V to accommodate the original 25V specification
Current Transfer Ratio: Minimum 7% @ 16mA to ensure adequate signal transfer
Input Type: DC input compatibility
Output Current: 8mA per channel

Substitute parts are grouped into two categories based on isolation voltage:

Group A - 5000Vrms Isolation (Direct Functional Equivalents): EL2530, HCPL-2530-020E, HCPL-4534-020E, ICPL2530

Group B - 3750Vrms Isolation (Reduced Isolation Voltage): HCPL-2530, HCPL-2530-000E, HCPL-2533, HCPL-2533-000E, HCPL-253L-000E, HCPL-4534-000E

Group A parts maintain the high isolation voltage specification. Group B parts operate at reduced isolation voltage and are suitable only for applications where 3750Vrms isolation is acceptable.

Parameter Comparison

Parameter	SFH6325	EL2530	HCPL-2530-020E	HCPL-4534-020E	ICPL2530	HCPL-2530	HCPL-2530-000E	HCPL-2533	HCPL-2533-000E	HCPL-253L-000E	HCPL-4534-000E
Number of Channels	2	2	2	2	2	2	2	2	2	2	2
Voltage - Isolation	5300Vrms	5000Vrms	5000Vrms	5000Vrms	5000Vrms	3750Vrms	3750Vrms	3750Vrms	3750Vrms	3750Vrms	3750Vrms
Current Transfer Ratio (Min)	7% @ 16mA	7% @ 16mA	7% @ 16mA	15% @ 16mA	7% @ 16mA	7% @ 16mA	7% @ 16mA	15% @ 8mA	15% @ 8mA	19% @ 16mA	15% @ 16mA
Turn On / Turn Off Time (Typ)	300ns, 600ns	350ns, 300ns	200ns, 1.3µs	200ns, 600ns	350ns, 500ns	200ns, 1.3µs	200ns, 1.3µs	800ns, 1µs	800ns, 1µs	200ns, 600ns	200ns, 600ns
Input Type	DC	DC	DC	DC	DC	DC	DC	DC	DC	DC	DC
Output Type	Transistor	Transistor	Transistor	Transistor	Transistor	Transistor	Transistor	Transistor	Transistor	Transistor	Transistor
Voltage - Output (Max)	25V	20V	20V	20V	20V	20V	20V	7V	7V	7V	20V
Current - Output / Channel	8mA	8mA	8mA	8mA	8mA	8mA	8mA	8mA	8mA	8mA	8mA
Voltage - Forward (Vf) (Typ)	1.33V	1.45V	1.5V	1.5V	1.45V	1.5V	1.5V	1.5V	1.5V	1.5V	1.5V
Current - DC Forward (If) (Max)	25mA	25mA	25mA	25mA	25mA	25mA	25mA	25mA	25mA	25mA	25mA
Operating Temperature	-55°C ~ 100°C	-40°C ~ 100°C	-55°C ~ 100°C	-55°C ~ 100°C	-40°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
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS non-compliant	ROHS3 Compliant	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

For applications requiring 5300Vrms isolation voltage:

EL2530, HCPL-2530-020E, HCPL-4534-020E, and ICPL2530 are the only substitutes that meet the original isolation specification at 5000Vrms. Among these, HCPL-2530-020E and HCPL-4534-020E are preferred due to active product status and ROHS3 compliance. HCPL-2530-020E is manufactured by Broadcom Limited and maintains compatibility with the original output voltage rating of 25V. HCPL-4534-020E also provides 20V output capability and active status with ROHS3 compliance.

EL2530 (Everlight Electronics) and ICPL2530 (Isocom Components) are active alternatives with 5000Vrms isolation. EL2530 offers reduced operating temperature range (-40°C to 100°C) compared to the original specification. ICPL2530 similarly operates at -40°C to 100°C.

For applications where 3750Vrms isolation is acceptable:

HCPL-2530-000E, HCPL-2533-000E, HCPL-253L-000E, and HCPL-4534-000E provide reduced isolation voltage with active product status and ROHS3 compliance. HCPL-2530-000E and HCPL-4534-000E maintain the 20V output voltage rating. HCPL-2533 and HCPL-2533-000E are limited to 7V output voltage and are suitable only for low-voltage output applications.

HCPL-2530 and HCPL-2533 are active products but carry RoHS non-compliant status and should be avoided in new designs requiring regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can HCPL-2530-000E be used as a direct replacement for SFH6325?

A: HCPL-2530-000E is mechanically and functionally compatible in terms of package, channel count, and output type. However, it operates at 3750Vrms isolation voltage compared to the original 5300Vrms. It is suitable only if the application does not require the higher isolation voltage specification.

Q: What is the difference between HCPL-2530-020E and HCPL-2530-000E?

A: Both are Broadcom HCPL-2530 base parts with identical electrical characteristics except for isolation voltage. HCPL-2530-020E provides 5000Vrms isolation, matching the original specification more closely. HCPL-2530-000E provides 3750Vrms isolation. Both are ROHS3 compliant and active products.

Q: Why do HCPL-2533 and HCPL-2533-000E have lower output voltage ratings?

A: HCPL-2533 variants are designed with maximum output voltage of 7V, limiting their use to applications requiring lower output voltage levels. They are not suitable for applications requiring the original 25V output capability.

Q: Are all substitute parts available in the same packaging?

A: Yes, all substitute parts listed are available in 8-DIP (0.300", 7.62mm) through-hole packaging, maintaining mechanical compatibility with the original SFH6325.

Q: Which substitute offers the best compliance profile?

A: HCPL-2530-020E, HCPL-4534-020E, HCPL-2530-000E, HCPL-2533-000E, HCPL-253L-000E, and HCPL-4534-000E all carry ROHS3 compliance status. For high isolation voltage requirements, HCPL-2530-020E and HCPL-4534-020E are preferred.

Q: What is the impact of different turn-on/turn-off times on circuit design?

A: The original SFH6325 specifies 300ns turn-on and 600ns turn-off time. Substitute parts vary in these parameters. HCPL-2530-020E, HCPL-4534-020E, and HCPL-253L-000E offer faster turn-on times (200ns) but may have different turn-off characteristics. Circuit timing requirements must be evaluated against the specific substitute part selected.

Q: Can EL2530 or ICPL2530 be used in temperature-critical applications?

A: Both EL2530 and ICPL2530 operate at -40°C to 100°C, which is narrower than the original -55°C to 100°C specification. They are not suitable for applications requiring operation below -40°C.

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