TLP521-1GBSM Equivalent & Substitute Parts

Part Overview

The TLP521-1GBSM is an optoisolator with transistor output manufactured by Isocom Components 2004 LTD. This single-channel device provides galvanic isolation rated at 5300Vrms and is designed for DC input applications requiring transistor-based switching outputs. The component is in active product status with RoHS3 compliance and unlimited moisture sensitivity level (MSL 1). Substitute parts are identified to support inventory availability, supply chain continuity, and design flexibility while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value
Manufacturer Part Number	TLP521-1GBSM
Manufacturer	Isocom Components 2004 LTD
Category	Optoisolators
Series	TLP521-1
Number of Channels	1
Voltage - Isolation	5300Vrms
Current Transfer Ratio (Min)	100% @ 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
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for the TLP521-1GBSM are qualified based on the following critical parameters that determine functional and mechanical compatibility:

Isolation Voltage: 5300Vrms (all substitutes match)

Channel Configuration: Single channel (all substitutes match)

Output Type: Transistor output (all substitutes match)

Package / Case: 4-SMD (0.300", 7.62mm) (all substitutes match)

Mounting Type: Surface Mount (all substitutes match)

Current Transfer Ratio Range: 100% to 600% @ 1mA (all substitutes match)

Maximum Output Voltage: 55V (all substitutes match)

Maximum Output Current: 50mA per channel (all substitutes match)

Operating Temperature Range: -30°C ~ 100°C (all substitutes match)

Input Type: DC (all substitutes match)

Compliance: RoHS3 Compliant, REACH Unaffected (all substitutes match)

The identified substitutes ISP521-1XGBSM and TLP521-1XGBSM maintain electrical performance within the same parametric envelope and are mechanically interchangeable in the same PCB footprint.

Parameter Comparison

Parameter	TLP521-1GBSM	ISP521-1XGBSM	TLP521-1XGBSM
Manufacturer	Isocom Components 2004 LTD	Isocom Components 2004 LTD	Isocom Components 2004 LTD
Number of Channels	1	1	1
Voltage - Isolation	5300Vrms	5300Vrms	5300Vrms
Current Transfer Ratio (Min)	100% @ 1mA	100% @ 1mA	100% @ 1mA
Current Transfer Ratio (Max)	600% @ 1mA	600% @ 1mA	600% @ 1mA
Turn On / Turn Off Time (Typ)	3µs, 3µs	Not specified	3µs, 3µs
Rise / Fall Time (Typ)	4µs, 3µs	4µs, 3µs	4µs, 3µs
Output Type	Transistor	Transistor	Transistor
Voltage - Output (Max)	55V	55V	55V
Current - Output / Channel	50mA	50mA	50mA
Voltage - Forward (Vf) (Typ)	1.15V	1.15V	1.15V
Current - DC Forward (If) (Max)	50 mA	50 mA	50 mA
Vce Saturation (Max)	400mV	400mV	400mV
Operating Temperature	-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)
Mounting Type	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active

Engineering Selection Recommendations

All three parts—TLP521-1GBSM, ISP521-1XGBSM, and TLP521-1XGBSM—are active products with identical RoHS3 compliance and REACH unaffected status. Selection between these parts should be based on availability and supply chain requirements. The TLP521-1XGBSM maintains complete specification alignment with the primary part TLP521-1GBSM, including turn-on/turn-off timing characteristics. The ISP521-1XGBSM provides equivalent electrical performance with the exception that turn-on/turn-off time specifications are not provided in the available data. All three parts are suitable for direct substitution in 4-SMD surface mount applications requiring single-channel optoisolation at 5300Vrms with transistor output.

Frequently Asked Questions (FAQ)

Q: Can ISP521-1XGBSM be used as a direct replacement for TLP521-1GBSM?

A: ISP521-1XGBSM is electrically equivalent across all specified parameters including isolation voltage, current transfer ratio, output voltage and current ratings, and operating temperature range. The turn-on/turn-off time specification is not provided for ISP521-1XGBSM. If turn-on/turn-off timing is critical to circuit performance, verify this parameter with the manufacturer before substitution.

Q: Can TLP521-1XGBSM be used as a direct replacement for TLP521-1GBSM?

A: Yes. TLP521-1XGBSM is a parametric equivalent with identical electrical specifications and timing characteristics. Both parts are from the same TLP521-1 series and are mechanically and functionally interchangeable.

Q: Are all three parts mechanically compatible in the same PCB footprint?

A: Yes. All three parts use the 4-SMD (0.300", 7.62mm) package with surface mount configuration, ensuring mechanical compatibility in the same PCB layout.

Q: What is the key difference between TLP521-1GBSM and ISP521-1XGBSM?

A: Both parts meet the same electrical performance requirements. ISP521-1XGBSM does not provide turn-on/turn-off time specifications in the available data, whereas TLP521-1GBSM specifies 3µs for both parameters.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. TLP521-1GBSM, ISP521-1XGBSM, and TLP521-1XGBSM are all RoHS3 compliant with MSL 1 (unlimited moisture sensitivity level).

Q: Can these parts be used in high-temperature applications?

A: All three parts are rated for operating temperatures from -30°C to 100°C. Applications requiring operation outside this range require alternative components.

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