TCET1102 Equivalent & Substitute Parts

Part Overview

The TCET1102 is a 5000Vrms optoisolator with transistor output manufactured by Vishay Semiconductor Opto Division. This single-channel device operates in the -40°C to 100°C temperature range and is packaged in a 4-DIP configuration. The part is active and in production with 1319 units currently in stock.

Substitute parts are necessary when the primary TCET1102 becomes unavailable, when alternative Current Transfer Ratio (CTR) specifications better match application requirements, or when different operating temperature ranges are required for specific system designs.

Key Parameters

Parameter	TCET1102
Manufacturer	Vishay Semiconductor Opto Division
Category	Optoisolators
Number of Channels	1
Voltage - Isolation	5000Vrms
Output Type	Transistor
Voltage - Output (Max)	70V
Current - Output / Channel	50mA
Package / Case	4-DIP (0.300", 7.62mm)
Mounting Type	Through Hole
Operating Temperature	-40°C ~ 100°C
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitution eligibility for the TCET1102 is determined by the following critical parameters:

Isolation Voltage: All substitutes must maintain 5000Vrms isolation rating
Package Type: All substitutes must use 4-DIP (0.300", 7.62mm) through-hole configuration
Output Type: All substitutes must feature transistor output
Number of Channels: All substitutes must be single-channel devices
Maximum Output Voltage: All substitutes must support 70V maximum output
Maximum Output Current: All substitutes must support 50mA per channel
Current Transfer Ratio (CTR): Substitutes may vary in CTR specifications (50% to 600% @ 5mA or 10mA), allowing selection based on application gain requirements
Operating Temperature Range: Substitutes operate at -30°C to 100°C, which is narrower than the TCET1102 (-40°C to 100°C)
Compliance: All substitutes maintain ROHS3 compliance and REACH unaffected status

All five Broadcom Limited HCPL-817 variants meet these substitution criteria and are active products in production.

Parameter Comparison

Parameter	TCET1102	HCPL-817-000E	HCPL-817-00AE	HCPL-817-00BE	HCPL-817-06BE	HCPL-817-06CE	HCPL-817-06LE
Manufacturer	Vishay	Broadcom	Broadcom	Broadcom	Broadcom	Broadcom	Broadcom
Number of Channels	1	1	1	1	1	1	1
Voltage - Isolation	5000Vrms	5000Vrms	5000Vrms	5000Vrms	5000Vrms	5000Vrms	5000Vrms
Current Transfer Ratio (Min)	63% @ 10mA	50% @ 5mA	80% @ 5mA	130% @ 5mA	130% @ 5mA	200% @ 5mA	50% @ 5mA
Current Transfer Ratio (Max)	125% @ 10mA	600% @ 5mA	160% @ 5mA	260% @ 5mA	260% @ 5mA	400% @ 5mA	100% @ 5mA
Turn On / Turn Off Time (Typ)	6µs, 5µs	-	-	-	-	-	-
Rise / Fall Time (Typ)	3µs, 4.7µs	4µs, 3µs	4µs, 3µs	4µs, 3µs	4µs, 3µs	4µs, 3µs	4µs, 3µs
Output Type	Transistor	Transistor	Transistor	Transistor	Transistor	Transistor	Transistor
Voltage - Output (Max)	70V	70V	70V	70V	70V	70V	70V
Current - Output / Channel	50mA	50mA	50mA	50mA	50mA	50mA	50mA
Voltage - Forward (Vf) (Typ)	1.25V	1.2V	1.2V	1.2V	1.2V	1.2V	1.2V
Current - DC Forward (If) (Max)	60mA	50mA	50mA	50mA	50mA	50mA	50mA
Vce Saturation (Max)	300mV	200mV	200mV	200mV	200mV	200mV	200mV
Operating Temperature	-40°C ~ 100°C	-30°C ~ 100°C	-30°C ~ 100°C	-30°C ~ 100°C	-30°C ~ 100°C	-30°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)	4-DIP (0.300", 7.62mm)	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	Through Hole	Through Hole	Through Hole	Through Hole
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All substitute parts are active products with ROHS3 compliance and REACH unaffected status, meeting regulatory requirements equivalent to the TCET1102.

The HCPL-817 family variants differ primarily in Current Transfer Ratio specifications:

HCPL-817-06LE: 50% to 100% CTR @ 5mA. Lowest gain specification, suitable for applications requiring minimal current transfer.
HCPL-817-000E: 50% to 600% CTR @ 5mA. Widest CTR range with lowest minimum specification.
HCPL-817-00AE: 80% to 160% CTR @ 5mA. Mid-range gain with 20300 units in stock.
HCPL-817-00BE: 130% to 260% CTR @ 5mA. Higher gain specification with 35400 units in stock.
HCPL-817-06BE: 130% to 260% CTR @ 5mA. Identical CTR to HCPL-817-00BE with 2070 units in stock.
HCPL-817-06CE: 200% to 400% CTR @ 5mA. Highest gain specification with 2300 units in stock.

All HCPL-817 variants feature improved Vce saturation (200mV maximum versus 300mV for TCET1102) and lower forward voltage (1.2V typical versus 1.25V for TCET1102). Operating temperature range is -30°C to 100°C, which does not extend to -40°C like the TCET1102.

Frequently Asked Questions (FAQ)

Q: Can HCPL-817 variants be used as direct replacements for TCET1102?

A: Yes, all five HCPL-817 variants are electrically and mechanically compatible substitutes. They maintain identical isolation voltage (5000Vrms), output voltage (70V maximum), output current (50mA), and 4-DIP package configuration. The primary differences are Current Transfer Ratio specifications and operating temperature range (-30°C to 100°C versus -40°C to 100°C for TCET1102).

Q: What is the significance of Current Transfer Ratio (CTR) differences?

A: CTR determines the ratio of output current to input current. Higher CTR values require less input current to achieve the same output current. Selection should be based on the specific input drive capability and output current requirements of the application circuit.

Q: Are all substitutes available in the same packaging?

A: All substitutes use 4-DIP (0.300", 7.62mm) through-hole packaging identical to TCET1102. HCPL-817-06BE is listed without packaging specification in the source data but maintains the same 4-DIP package configuration.

Q: What is the impact of the narrower operating temperature range for HCPL-817 variants?

A: HCPL-817 variants operate from -30°C to 100°C, while TCET1102 operates from -40°C to 100°C. Applications requiring operation below -30°C must use TCET1102 or verify that HCPL-817 variants meet specific low-temperature performance requirements.

Q: How do Vce saturation differences affect circuit design?

A: HCPL-817 variants feature 200mV maximum Vce saturation compared to 300mV for TCET1102. Lower saturation voltage reduces power dissipation in the output transistor, resulting in improved efficiency and reduced thermal load.

Q: Which HCPL-817 variant should be selected for general-purpose applications?

A: HCPL-817-00AE and HCPL-817-00BE are recommended for general-purpose applications. HCPL-817-00AE (80% to 160% CTR) provides mid-range gain with 20300 units in stock. HCPL-817-00BE (130% to 260% CTR) provides higher gain with 35400 units in stock, the highest inventory level among all variants.

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