TCET1200 Optoisolator Equivalent & Substitute Parts

Part Overview

The TCET1200 is a 5000Vrms optoisolator with transistor output manufactured by Vishay Semiconductor Opto Division in a 4-DIP package. This component provides galvanic isolation for DC input signals with single-channel transistor switching capability. The TCET1200 is classified as obsolete, making identification of active equivalent parts essential for new designs and ongoing production support. Substitute parts must maintain identical isolation voltage, channel configuration, output type, and package form factor while meeting current availability and compliance requirements.

Key Parameters

Parameter	Value
Isolation Voltage	5000Vrms
Number of Channels	1
Output Type	Transistor
Package / Case	4-DIP (0.300", 7.62mm)
Mounting Type	Through Hole
Voltage - Output (Max)	70V
Current - Output / Channel	50mA
Operating Temperature Range	-40°C ~ 100°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the TCET1200 is determined by strict equivalence across the following parameters:

Isolation voltage: 5000Vrms (mandatory)
Channel configuration: 1 channel (mandatory)
Output type: Transistor (mandatory)
Package form: 4-DIP (0.300", 7.62mm) (mandatory)
Mounting: Through Hole (mandatory)
Maximum output voltage: 70V (mandatory)
Maximum output current: 50mA per channel (mandatory)

The TCET1100 (Vishay) and HCPL-817-060E (Broadcom) meet all mandatory substitution criteria. Both are active products with current manufacturing status and full RoHS3 compliance.

Parameter Comparison

Parameter	TCET1200	TCET1100	HCPL-817-060E
Manufacturer	Vishay Semiconductor Opto Division	Vishay Semiconductor Opto Division	Broadcom Limited
Product Status	Obsolete	Active	Active
Number of Channels	1	1	1
Voltage - Isolation	5000Vrms	5000Vrms	5000Vrms
Current Transfer Ratio (Min)	50% @ 5mA	50% @ 5mA	50% @ 5mA
Current Transfer Ratio (Max)	600% @ 5mA	600% @ 5mA	600% @ 5mA
Turn On / Turn Off Time (Typ)	6µs, 5µs	6µs, 5µs	Not specified
Rise / Fall Time (Typ)	3µs, 4.7µs	3µs, 4.7µs	4µs, 3µs
Input Type	DC	DC	DC
Output Type	Transistor	Transistor	Transistor
Voltage - Output (Max)	70V	70V	70V
Current - Output / Channel	50mA	50mA	50mA
Voltage - Forward (Vf) (Typ)	1.25V	1.25V	1.2V
Current - DC Forward (If) (Max)	60mA	60mA	50mA
Vce Saturation (Max)	300mV	300mV	200mV
Operating Temperature	-40°C ~ 100°C	-40°C ~ 100°C	-30°C ~ 100°C
Package / Case	4-DIP (0.300", 7.62mm)	4-DIP (0.300", 7.62mm)	4-DIP (0.300", 7.62mm)
Mounting Type	Through Hole	Through Hole	Through Hole
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

The TCET1100 is the primary substitute for the obsolete TCET1200. Both components are manufactured by Vishay Semiconductor Opto Division and share identical electrical and mechanical specifications. The TCET1100 is currently in active production with confirmed inventory availability. This part maintains full parameter compatibility and requires no circuit redesign.

The HCPL-817-060E (Broadcom Limited) is an alternative substitute that meets all mandatory isolation, channel, output type, and package requirements. The HCPL-817-060E exhibits improved performance in specific parameters: lower Vce saturation (200mV vs. 300mV) and lower maximum forward current (50mA vs. 60mA). The operating temperature minimum is -30°C compared to -40°C for the TCET1200 and TCET1100. Both substitute parts carry ROHS3 compliance and unlimited moisture sensitivity ratings, matching the original component's environmental certifications.

Frequently Asked Questions (FAQ)

Q: Can the TCET1100 be used as a direct replacement for the TCET1200?

A: Yes. The TCET1100 is a parametric equivalent with identical isolation voltage (5000Vrms), channel count (1), output type (transistor), package form (4-DIP), and all critical electrical specifications. No circuit modifications are required.

Q: What are the key differences between the TCET1100 and HCPL-817-060E?

A: Both parts meet all mandatory substitution criteria. The HCPL-817-060E offers lower Vce saturation (200mV vs. 300mV) and lower maximum forward current (50mA vs. 60mA). The TCET1100 supports a lower operating temperature minimum (-40°C vs. -30°C). Turn-on/turn-off timing specifications are provided for the TCET1100 but not specified for the HCPL-817-060E.

Q: Are both substitute parts RoHS compliant?

A: Yes. Both the TCET1100 and HCPL-817-060E are ROHS3 compliant with MSL rating 1 (unlimited moisture sensitivity), matching the original TCET1200 certifications.

Q: Can these parts be used interchangeably in the same PCB layout?

A: Yes. All three parts (TCET1200, TCET1100, HCPL-817-060E) use identical 4-DIP (0.300", 7.62mm) through-hole packaging, enabling direct PCB footprint compatibility without layout modifications.

Q: Which substitute should be selected for new designs?

A: The TCET1100 is recommended for new designs as the primary equivalent, offering identical specifications to the original TCET1200 with active production status. The HCPL-817-060E is suitable where improved saturation voltage performance is beneficial and the -30°C minimum operating temperature is acceptable.

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