TLP521-1BLSMT&R Equivalent & Substitute Parts

Part Overview

The TLP521-1BLSMT&R is an optoisolator with transistor output manufactured by Isocom Components 2004 LTD. This single-channel device provides galvanic isolation rated at 5300Vrms in a 4-SMD surface mount package. The part is currently active in production with 770 units in stock. Equivalent and substitute parts are identified based on matching electrical characteristics, isolation voltage, output specifications, and physical packaging requirements.

Key Parameters

Parameter	Value
Manufacturer Part Number	TLP521-1BLSMT&R
Manufacturer	Isocom Components 2004 LTD
Category	Optoisolators
Number of Channels	1
Voltage - Isolation	5300Vrms
Current Transfer Ratio (Min)	200% @ 1mA
Current Transfer Ratio (Max)	600% @ 1mA
Output Type	Transistor
Voltage - Output (Max)	55V
Current - Output / Channel	50mA
Vce Saturation (Max)	400mV
Operating Temperature	-30°C ~ 100°C
Package / Case	4-SMD (0.300", 7.62mm)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the TLP521-1BLSMT&R are qualified based on the following criteria:

Electrical Equivalence: All substitute parts maintain identical isolation voltage (5300Vrms), current transfer ratio range (200% to 600% @ 1mA), maximum output voltage (55V), output current per channel (50mA), and Vce saturation specification (400mV maximum).

Mechanical Compatibility: All substitute parts use the same 4-SMD surface mount package (0.300", 7.62mm), ensuring direct PCB footprint compatibility without layout modifications.

Environmental & Compliance Alignment: All substitute parts share the same operating temperature range (-30°C to 100°C), RoHS3 compliance status, MSL rating (1 - Unlimited), and regulatory classifications (ECCN: EAR99, HTSUS: 8541.49.8000).

Input/Output Configuration: All parts feature DC input type and transistor output topology with identical functional characteristics.

The three substitute parts differ only in series designation and minor timing specifications where data is available, with no impact on core substitution eligibility.

Parameter Comparison

Parameter	TLP521-1BLSMT&R	TLP521-1XBLSMT&R	TLP521XBLSMT&R	ISP521-1XBLSMT&R
Manufacturer	Isocom Components 2004 LTD	Isocom Components 2004 LTD	Isocom Components 2004 LTD	Isocom Components 2004 LTD
Number of Channels	1	1	1	1
Voltage - Isolation	5300Vrms	5300Vrms	5300Vrms	5300Vrms
Current Transfer Ratio (Min)	200% @ 1mA	200% @ 1mA	200% @ 1mA	200% @ 1mA
Current Transfer Ratio (Max)	600% @ 1mA	600% @ 1mA	600% @ 1mA	600% @ 1mA
Output Type	Transistor	Transistor	Transistor	Transistor
Voltage - Output (Max)	55V	55V	55V	55V
Current - Output / Channel	50mA	50mA	50mA	50mA
Voltage - Forward (Vf) (Typ)	1.15V	1.15V	1.15V	1.15V
Vce Saturation (Max)	400mV	400mV	400mV	400mV
Operating Temperature	-30°C ~ 100°C	-30°C ~ 100°C	-30°C ~ 100°C	-30°C ~ 100°C
Package / Case	4-SMD (0.300", 7.62mm)	4-SMD (0.300", 7.62mm)	4-SMD (0.300", 7.62mm)	4-SMD (0.300", 7.62mm)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active	Active
Inventory (Pcs)	770	1736	1797	1824

Engineering Selection Recommendations

All four parts are active products from Isocom Components 2004 LTD with identical RoHS3 compliance and regulatory status. Selection between the TLP521-1BLSMT&R and its substitutes should be based on availability and inventory levels. The substitute parts TLP521-1XBLSMT&R, TLP521XBLSMT&R, and ISP521-1XBLSMT&R each maintain higher inventory levels (1736, 1797, and 1824 units respectively) compared to the primary part (770 units), providing greater supply assurance for production requirements.

All parts meet identical electrical and mechanical specifications for direct substitution in applications requiring single-channel optoisolation at 5300Vrms with transistor output in 4-SMD surface mount packaging.

Frequently Asked Questions (FAQ)

Q: Can TLP521-1XBLSMT&R be used as a direct replacement for TLP521-1BLSMT&R?

A: Yes. Both parts share identical electrical specifications including isolation voltage (5300Vrms), current transfer ratio (200% to 600% @ 1mA), output voltage (55V maximum), output current (50mA), and package type (4-SMD). The parts are mechanically and electrically interchangeable.

Q: What is the difference between TLP521-1BLSMT&R and ISP521-1XBLSMT&R?

A: The primary difference is the series designation (TLP521-1 versus ISP521-1). Both parts maintain identical electrical performance specifications, isolation ratings, output characteristics, and 4-SMD packaging. The ISP521-1XBLSMT&R has higher inventory availability (1824 units versus 770 units).

Q: Are all substitute parts in the same physical package?

A: Yes. All four parts use the 4-SMD package with 0.300" (7.62mm) dimensions, ensuring identical PCB footprint compatibility without layout modifications.

Q: Do all substitute parts meet the same compliance standards?

A: Yes. All parts are ROHS3 compliant, REACH unaffected, carry MSL rating 1 (Unlimited), and share identical ECCN (EAR99) and HTSUS (8541.49.8000) classifications.

Q: Can I mix these parts in the same production batch?

A: Yes. All parts are functionally equivalent with matching electrical and mechanical specifications, allowing interchangeable use within the same application and production environment.

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