EL1017-G Optoisolator Equivalent & Substitute Parts

Part Overview

The EL1017-G is a 5000Vrms isolation optoisolator with transistor output manufactured by Everlight Electronics Co Ltd. This single-channel device operates in a 4-SOP surface mount package and is classified as Active product status. The component provides galvanic isolation suitable for applications requiring high voltage isolation with DC input control and transistor output switching capability.

Substitute parts are identified based on matching isolation voltage, package type, channel configuration, output type, and operating temperature range. Alternative models from Vishay Semiconductor Opto Division and other manufacturers within the same product category maintain functional equivalence when electrical parameters fall within acceptable application tolerances.

Key Parameters

Parameter	Value	Unit
Manufacturer Part Number	EL1017-G	—
Manufacturer	Everlight Electronics Co Ltd	—
Category	Optoisolators	—
Number of Channels	1	—
Voltage - Isolation	5000	Vrms
Output Type	Transistor	—
Input Type	DC	—
Package / Case	4-SMD, Gull Wing	—
Supplier Device Package	4-SOP (2.54mm)	—
Mounting Type	Surface Mount	—
Operating Temperature Range	-55 to 110	°C
Current - Output / Channel	50	mA
Voltage - Output (Max)	80	V
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the EL1017-G are selected based on the following critical parameters that determine functional equivalence:

Primary Matching Criteria:

Voltage - Isolation: 5000Vrms (mandatory match)
Number of Channels: 1 (mandatory match)
Output Type: Transistor (mandatory match)
Input Type: DC (mandatory match)
Package / Case: 4-SMD, Gull Wing (mandatory match)
Supplier Device Package: 4-SOP (mandatory match)
Mounting Type: Surface Mount (mandatory match)

Secondary Compatibility Parameters:

Current - Output / Channel: 50mA (all substitutes match)
Vce Saturation (Max): 300mV (all substitutes match)
Current - DC Forward (If) (Max): 60mA (all substitutes match)
RoHS Status: ROHS3 Compliant (all substitutes match)
Moisture Sensitivity Level: 1 (Unlimited) (all substitutes match)

Variable Parameters (Application-Dependent):

Current Transfer Ratio (Min/Max): Varies by part number
Turn On / Turn Off Time: Varies by part number
Rise / Fall Time: Varies by part number
Voltage - Forward (Vf): Varies by part number
Operating Temperature (Max): 100°C or 110°C

All listed substitute parts maintain the core isolation voltage, channel count, output configuration, and package specifications. Differences in current transfer ratio, switching speed, and forward voltage reflect different performance grades within the same product family and must be evaluated against specific application requirements.

Parameter Comparison

Parameter	EL1017-G	TCLT1000	TCLT1002	TCLT1003	TCLT1005	TCLT1006	TCLT1007	TCLT1008	TCLT1009	VOL617A-1X001T	VOL617A-2X001T
Manufacturer	Everlight	Vishay	Vishay	Vishay	Vishay	Vishay	Vishay	Vishay	Vishay	Vishay	Vishay
Voltage - Isolation (Vrms)	5000	5000	5000	5000	5000	5000	5000	5000	5000	5000	5000
Number of Channels	1	1	1	1	1	1	1	1	1	1	1
Output Type	Transistor	Transistor	Transistor	Transistor	Transistor	Transistor	Transistor	Transistor	Transistor	Transistor	Transistor
Input Type	DC	DC	DC	DC	DC	DC	DC	DC	DC	DC	DC
Package / Case	4-SMD, Gull Wing	4-SMD, Gull Wing	4-SMD, Gull Wing	4-SMD, Gull Wing	4-SMD, Gull Wing	4-SMD, Gull Wing	4-SMD, Gull Wing	4-SMD, Gull Wing	4-SMD, Gull Wing	4-SMD, Gull Wing	4-SMD, Gull Wing
Supplier Device Package	4-SOP (2.54mm)	4-SOP	4-SOP	4-SOP	4-SOP	4-SOP	4-SOP	4-SOP	4-SOP	4-SOP	4-SOP
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Current - Output / Channel (mA)	50	50	50	50	50	50	50	50	50	50	50
Voltage - Output (Max) (V)	80	70	70	70	70	70	70	70	70	80	80
Voltage - Forward (Vf) (Typ) (V)	1.45	1.25	1.25	1.25	1.25	1.25	1.25	1.25	1.25	1.16	1.16
Current - DC Forward (If) (Max) (mA)	60	60	60	60	60	60	60	60	60	60	60
Vce Saturation (Max) (mV)	300	300	300	300	300	300	300	300	300	400	400
Operating Temperature (Min) (°C)	-55	-55	-55	-55	-55	-55	-55	-55	-55	-55	-55
Operating Temperature (Max) (°C)	110	100	100	100	100	100	100	100	100	110	110
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Substitutes (Closest Electrical Match):

TCLT1007 and TCLT1008 from Vishay Semiconductor Opto Division provide the closest electrical alignment to the EL1017-G. Both parts maintain identical current transfer ratio specifications (80-160% @ 5mA and 130-260% @ 5mA respectively), matching the EL1017-G's 80-160% @ 5mA range. These parts are Active status, ROHS3 compliant, and carry MSL 1 rating. The primary trade-off is maximum operating temperature of 100°C versus the EL1017-G's 110°C capability.

Extended Temperature Range Alternatives:

VOL617A-1X001T and VOL617A-2X001T maintain the full -55°C to 110°C operating temperature range matching the EL1017-G. These parts preserve maximum output voltage at 80V and support the extended temperature specification. VOL617A-2X001T (63-125% @ 5mA current transfer ratio) aligns more closely with mid-range performance expectations. Both are ROHS3 compliant with MSL 1 rating. Vce saturation is higher at 400mV maximum compared to 300mV for the EL1017-G.

High Current Transfer Ratio Options:

TCLT1006, TCLT1008, and TCLT1009 offer elevated current transfer ratios (100-300%, 130-260%, and 200-400% @ 5mA respectively) for applications requiring higher gain performance. These parts are suitable when the EL1017-G's 80-160% range is insufficient for circuit design margins.

All substitute parts listed maintain:

5000Vrms isolation voltage
Single-channel transistor output configuration
4-SOP surface mount package
50mA output current capability
ROHS3 compliance
MSL 1 moisture sensitivity rating
Active product status

Frequently Asked Questions (FAQ)

Q: Can TCLT1000 series parts directly replace the EL1017-G in existing designs?

A: TCLT1000 series parts are electrically compatible for the core isolation and switching functions. All maintain 5000Vrms isolation, single-channel transistor output, and 4-SOP package configuration. However, TCLT1000 series parts operate to a maximum of 100°C versus the EL1017-G's 110°C. Applications operating near the upper temperature limit require evaluation. Current transfer ratio ranges differ: TCLT1000 is 50-600% @ 5mA versus EL1017-G's 80-160% @ 5mA, which may affect circuit gain characteristics.

Q: What is the difference between TCLT1002 and TCLT1003?

A: Both parts are 5000Vrms optoisolators in 4-SOP packages with identical switching times and rise/fall times. The primary difference is current transfer ratio specification: TCLT1002 is 63-125% @ 10mA, while TCLT1003 is 100-200% @ 10mA. TCLT1003 provides higher and more consistent gain. TCLT1002 is available in higher inventory (143,200 pcs) compared to TCLT1003 (48,579 pcs).

Q: Why do VOL617A parts show 80V maximum output voltage while most TCLT parts show 70V?

A: VOL617A-1X001T and VOL617A-2X001T are rated for 80V maximum output voltage, matching the EL1017-G specification. TCLT series parts are rated for 70V maximum output voltage. For applications requiring switching voltages above 70V, VOL617A parts are the appropriate selection. Both part families maintain identical 50mA output current capability and 5000Vrms isolation.

Q: Are all substitute parts available in the same packaging options as the EL1017-G?

A: The EL1017-G is supplied in standard packaging. TCLT1000, TCLT1005, TCLT1006, TCLT1007, and TCLT1008 are available in Tape & Reel (TR) packaging. TCLT1002, TCLT1003, and TCLT1009 are available in Cut Tape (CT) & Digi-Reel® packaging. VOL617A-1X001T and VOL617A-2X001T are supplied in Tape & Reel (TR) packaging. Packaging format selection depends on assembly process requirements and volume specifications.

Q: What is the significance of the current transfer ratio (CTR) specification differences?

A: Current transfer ratio defines the output current relative to input current. The EL1017-G specifies 80-160% @ 5mA input. Parts with lower CTR (such as TCLT1000 at 50-600% @ 5mA) provide wider gain range but less predictable performance. Parts with tighter CTR ranges (such as TCLT1003 at 100-200% @ 10mA) offer more consistent switching behavior. Application circuit design must account for the CTR range of the selected part to ensure proper switching margins across production tolerances and temperature variations.

Q: Can TCLT1009 be used in place of EL1017-G despite its 200-400% current transfer ratio?

A: TCLT1009 maintains all core electrical and package specifications matching the EL1017-G: 5000Vrms isolation, single-channel transistor output, 4-SOP package, 50mA output current, and 300mV Vce saturation. The 200-400% current transfer ratio is significantly higher than the EL1017-G's 80-160% range. TCLT1009 is suitable for applications where higher gain is beneficial or where circuit design accommodates the elevated CTR specification. Applications with tight gain requirements or sensitive to CTR variation should select parts with CTR ranges closer to the EL1017-G specification.

Q: What is the impact of forward voltage (Vf) differences between parts?

A: The EL1017-G specifies 1.45V typical forward voltage, while most TCLT parts specify 1.25V and VOL617A parts specify 1.16V. Lower forward voltage reduces input LED current requirements for a given input voltage. Applications with current-limited input drivers benefit from lower Vf parts. The difference of 0.2-0.3V is typically accommodated by standard input circuit designs but should be verified in applications with marginal input current budgets.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance certification, matching the EL1017-G. All parts also carry MSL 1 (Unlimited) moisture sensitivity rating, indicating no moisture sensitivity precautions are required during storage or handling.

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