TCET1104 Equivalent & Substitute Parts

Part Overview

The TCET1104 is a 5000Vrms optoisolator with transistor output manufactured by Vishay Semiconductor Opto Division in 4-DIP package configuration. This component features single-channel isolation with 160-320% current transfer ratio at 10mA, designed for DC input applications with 50mA output capability and -40°C to 100°C operating range.

The TCET1104 is classified as obsolete. Direct substitutes are necessary for new designs and ongoing production requirements. Equivalent parts maintain identical electrical isolation, package form factor, and output characteristics while offering active product status and improved availability.

Key Parameters

Parameter	Value
Voltage - Isolation	5000Vrms
Number of Channels	1
Current Transfer Ratio (Min)	160% @ 10mA
Current Transfer Ratio (Max)	320% @ 10mA
Output Type	Transistor
Voltage - Output (Max)	70V
Current - Output / Channel	50mA
Vce Saturation (Max)	300mV
Operating Temperature	-40°C ~ 100°C
Package / Case	4-DIP (0.300", 7.62mm)
Mounting Type	Through Hole
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the TCET1104 is determined by strict equivalence across the following critical parameters:

Voltage isolation rating: 5000Vrms (mandatory match)
Package configuration: 4-DIP (0.300", 7.62mm) through-hole (mandatory match)
Output type: Transistor (mandatory match)
Number of channels: 1 (mandatory match)
Maximum output voltage: 70V (mandatory match)
Maximum output current: 50mA (mandatory match)
Input type: DC (mandatory match)
RoHS3 compliance and MSL-1 rating (mandatory match)

Substitute parts are grouped into two categories: parametric equivalents from the same manufacturer (Vishay TCET series) and manufacturer-recommended alternatives from Broadcom (HCPL-817 series). All listed substitutes maintain identical isolation voltage, package form factor, and output specifications. Current transfer ratio variations within the HCPL-817 series reflect different grade designations (00AE, 00BE, 00CE, 00DE, 00LE, 060E, 06AE, 06BE) and do not affect functional interchangeability for applications requiring 5000Vrms isolation in 4-DIP configuration.

Parameter Comparison

Part Number	Manufacturer	Product Status	Voltage - Isolation	CTR Min @ Test Current	CTR Max @ Test Current	Vce Sat (Max)	Operating Temp	Package
TCET1104	Vishay	Obsolete	5000Vrms	160% @ 10mA	320% @ 10mA	300mV	-40°C ~ 100°C	4-DIP
TCET1204	Vishay	Active	5000Vrms	160% @ 10mA	320% @ 10mA	300mV	-40°C ~ 100°C	4-DIP
HCPL-817-000E	Broadcom	Active	5000Vrms	50% @ 5mA	600% @ 5mA	200mV	-30°C ~ 100°C	4-DIP
HCPL-817-00AE	Broadcom	Active	5000Vrms	80% @ 5mA	160% @ 5mA	200mV	-30°C ~ 100°C	4-DIP
HCPL-817-00BE	Broadcom	Active	5000Vrms	130% @ 5mA	260% @ 5mA	200mV	-30°C ~ 100°C	4-DIP
HCPL-817-00CE	Broadcom	Active	5000Vrms	200% @ 5mA	400% @ 5mA	200mV	-30°C ~ 100°C	4-DIP
HCPL-817-00DE	Broadcom	Active	5000Vrms	300% @ 5mA	600% @ 5mA	200mV	-30°C ~ 100°C	4-DIP
HCPL-817-00LE	Broadcom	Active	5000Vrms	50% @ 5mA	100% @ 5mA	200mV	-30°C ~ 100°C	4-DIP
HCPL-817-060E	Broadcom	Active	5000Vrms	50% @ 5mA	600% @ 5mA	200mV	-30°C ~ 100°C	4-DIP
HCPL-817-06AE	Broadcom	Active	5000Vrms	80% @ 5mA	160% @ 5mA	200mV	-30°C ~ 100°C	4-DIP
HCPL-817-06BE	Broadcom	Active	5000Vrms	130% @ 5mA	260% @ 5mA	200mV	-30°C ~ 100°C	4-DIP

Engineering Selection Recommendations

The TCET1204 from Vishay provides direct parametric equivalence to the TCET1104 with identical current transfer ratio specifications and operating temperature range. TCET1204 maintains active product status with significantly higher inventory availability (27,517 units) and is the primary recommendation for applications requiring exact electrical performance matching.

The Broadcom HCPL-817 series offers functional equivalence across all critical isolation, package, and output specifications. These components are active products with robust supply availability. Selection within the HCPL-817 series depends on application current transfer ratio requirements:

HCPL-817-00AE and HCPL-817-06AE: 80-160% CTR range, suitable for applications requiring moderate gain HCPL-817-00BE and HCPL-817-06BE: 130-260% CTR range, closest alignment to TCET1104 nominal performance HCPL-817-00CE: 200-400% CTR range, high-gain applications HCPL-817-00DE and HCPL-817-060E: 300-600% CTR range, maximum gain applications HCPL-817-00LE: 50-100% CTR range, low-gain applications HCPL-817-000E and HCPL-817-060E: 50-600% CTR range, wide-range applications

All substitute parts maintain ROHS3 compliance and MSL-1 moisture sensitivity rating. Operating temperature range for Broadcom parts extends to -30°C minimum compared to TCET1104's -40°C; applications requiring operation below -30°C must use TCET1204.

Frequently Asked Questions (FAQ)

Q: Can TCET1204 be used as a direct replacement for TCET1104?

A: Yes. TCET1204 provides identical electrical specifications including 5000Vrms isolation, 160-320% current transfer ratio at 10mA, 300mV Vce saturation, and -40°C to 100°C operating range. Both use 4-DIP through-hole packaging. TCET1204 is the preferred substitute due to active product status and higher availability.

Q: What is the difference between HCPL-817-00AE and HCPL-817-06AE?

A: Both parts share identical electrical specifications (80-160% CTR at 5mA, 5000Vrms isolation, 4-DIP package). The designation difference reflects internal manufacturing or grading variations. Both are functionally equivalent for circuit applications.

Q: Why do HCPL-817 parts have different current transfer ratio specifications than TCET1104?

A: HCPL-817 variants are tested at 5mA input current while TCET1104 is specified at 10mA. This difference reflects manufacturer test methodology and does not affect functional interchangeability. All parts maintain the same 5000Vrms isolation, 70V maximum output voltage, 50mA output current, and 4-DIP package configuration required for substitution.

Q: Is the 4-DIP package identical across all listed parts?

A: Yes. All substitute parts use 4-DIP (0.300", 7.62mm) through-hole package configuration. Direct PCB footprint compatibility is maintained across TCET1104, TCET1204, and all HCPL-817 variants.

Q: Can HCPL-817 parts be used in applications requiring -40°C operation?

A: HCPL-817 series components are rated for -30°C to 100°C operating range. Applications requiring operation at -40°C must use TCET1104 or TCET1204, which are specified to -40°C minimum.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. TCET1204 and all HCPL-817 variants listed maintain ROHS3 compliance and MSL-1 moisture sensitivity rating, matching TCET1104 environmental specifications.

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