EL817(S)(A)(TB) Equivalent & Substitute Parts

Part Overview

The EL817(S)(A)(TB) is a 5000Vrms optoisolator with transistor output manufactured by Everlight Electronics Co Ltd. This single-channel device operates in 4-SMD surface mount configuration and is designed for DC input applications requiring galvanic isolation. The part is currently discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components that maintain electrical and mechanical compatibility for ongoing production and repair applications.

Key Parameters

Parameter	Value
Manufacturer	Everlight Electronics Co Ltd
Category	Optoisolators
Number of Channels	1
Voltage - Isolation	5000Vrms
Current Transfer Ratio (Min)	80% @ 5mA
Current Transfer Ratio (Max)	160% @ 5mA
Rise / Fall Time (Typ)	4µs, 3µs
Input Type	DC
Output Type	Transistor
Voltage - Output (Max)	35V
Current - Output / Channel	50mA
Voltage - Forward (Vf) (Typ)	1.2V
Current - DC Forward (If) (Max)	60 mA
Vce Saturation (Max)	200mV
Operating Temperature	-55°C ~ 110°C
Mounting Type	Surface Mount
Package / Case	4-SMD, Gull Wing
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the EL817(S)(A)(TB) is determined by strict equivalence across the following critical parameters:

Isolation Voltage: 5000Vrms isolation rating is mandatory for all substitutes.

Channel Configuration: Single-channel (1 Channel) requirement must be maintained.

Output Stage: Transistor output type is required; no alternative output configurations are acceptable.

Current Transfer Ratio: Minimum 80% and maximum 160% @ 5mA defines the operational gain characteristics.

Switching Performance: Rise and fall times of 4µs and 3µs respectively establish the speed classification.

Input Type: DC input specification must be preserved.

Output Voltage Rating: Maximum 35V output voltage capability is the specified limit.

Output Current: 50mA per channel is the rated output current.

Saturation Voltage: Vce saturation maximum of 200mV defines the on-state performance.

Temperature Range: Operating range of -55°C to 110°C must be supported.

Package Format: 4-SMD, Gull Wing surface mount configuration is required for PCB compatibility.

Compliance: ROHS3 compliance and MSL Level 1 are mandatory for supply chain and manufacturing requirements.

Parametric equivalents from Everlight Electronics maintain all specified parameters identically. Similar parts from alternative manufacturers may exhibit variations in certain parameters while maintaining functional compatibility within defined application constraints.

Parameter Comparison

Part Number	Manufacturer	Isolation Voltage	CTR Min @ 5mA	CTR Max @ 5mA	Output Voltage (Max)	Output Current	Vce Sat (Max)	Temp Range	Product Status
EL817(S)(A)(TB)	Everlight	5000Vrms	80%	160%	35V	50mA	200mV	-55°C ~ 110°C	Discontinued
EL817(S)(A)(TD)	Everlight	5000Vrms	80%	160%	35V	50mA	200mV	-55°C ~ 110°C	Active
EL817(S)(A)(TD)-V	Everlight	5000Vrms	80%	160%	35V	50mA	200mV	-55°C ~ 110°C	Active
EL817(S)(A)(TU)	Everlight	5000Vrms	80%	160%	35V	50mA	200mV	-55°C ~ 110°C	Active
EL817(S)(A)(TU)-V	Everlight	5000Vrms	80%	160%	35V	50mA	200mV	-55°C ~ 110°C	Active
EL817(S1)(A)(TD)	Everlight	5000Vrms	80%	160%	35V	50mA	200mV	-55°C ~ 110°C	Active
EL817(S1)(A)(TD)-V	Everlight	5000Vrms	80%	160%	35V	50mA	200mV	-55°C ~ 110°C	Active
EL817(S1)(A)(TU)	Everlight	5000Vrms	80%	160%	35V	50mA	200mV	-55°C ~ 110°C	Active
EL817S1(A)(TU)-V	Everlight	5000Vrms	80%	160%	35V	50mA	200mV	-55°C ~ 110°C	Active
HCPL-817-300E	Broadcom	5000Vrms	50%	600%	70V	50mA	200mV	-30°C ~ 100°C	Active
HCPL-817-30AE	Broadcom	5000Vrms	80%	160%	70V	50mA	200mV	-30°C ~ 100°C	Active

Engineering Selection Recommendations

Parametric Equivalents (Everlight EL817 Series):

The EL817(S)(A)(TD), EL817(S)(A)(TD)-V, EL817(S)(A)(TU), EL817(S)(A)(TU)-V, EL817(S1)(A)(TD), EL817(S1)(A)(TD)-V, EL817(S1)(A)(TU), and EL817S1(A)(TU)-V are direct parametric equivalents of the discontinued EL817(S)(A)(TB). All variants maintain identical electrical specifications across isolation voltage, current transfer ratio, output voltage, output current, saturation voltage, and operating temperature range. All are ROHS3 compliant with MSL Level 1 rating. These parts are currently in active production status with confirmed inventory availability.

Similar Alternatives (Broadcom HCPL-817 Series):

The HCPL-817-300E and HCPL-817-30AE from Broadcom Limited are similar optoisolators with 5000Vrms isolation and transistor output. The HCPL-817-30AE maintains the identical current transfer ratio specification (80% to 160% @ 5mA) as the EL817(S)(A)(TB). Both Broadcom variants feature higher maximum output voltage (70V versus 35V) and are ROHS3 compliant. The HCPL-817-300E exhibits a wider current transfer ratio range (50% to 600% @ 5mA), which may introduce different gain characteristics in circuit operation. Operating temperature range for Broadcom parts is -30°C to 100°C, which is narrower than the EL817 range of -55°C to 110°C.

Selection Criteria:

For direct replacement in existing designs, select from the Everlight EL817 parametric equivalents. For applications requiring extended temperature operation below -30°C or above 100°C, the EL817 series is required. For applications where higher output voltage capability (70V) is beneficial, Broadcom HCPL-817 variants are suitable when current transfer ratio characteristics are compatible with circuit design.

Frequently Asked Questions (FAQ)

Q: Can EL817(S)(A)(TD) directly replace EL817(S)(A)(TB) on existing PCBs?

A: Yes. The EL817(S)(A)(TD) is a parametric equivalent with identical electrical specifications and 4-SMD Gull Wing package configuration. No circuit modifications are required.

Q: What is the difference between EL817(S)(A)(TB) and EL817(S1)(A)(TB)?

A: The input provided does not include EL817(S1)(A)(TB) specifications. The EL817(S1) variants listed (TD, TD-V, TU, TU-V) are available as active alternatives with identical electrical parameters to the discontinued EL817(S)(A)(TB).

Q: Are Broadcom HCPL-817 parts compatible with EL817 designs?

A: Broadcom HCPL-817 parts share the same 5000Vrms isolation, transistor output, 50mA output current, and 200mV saturation voltage. The HCPL-817-30AE matches the current transfer ratio (80% to 160% @ 5mA). However, the higher maximum output voltage (70V versus 35V) and narrower operating temperature range (-30°C to 100°C versus -55°C to 110°C) must be evaluated for specific application requirements.

Q: What does the suffix designation mean (TD, TU, TD-V, TU-V)?

A: The input provided does not specify the technical meaning of these suffix designations. They represent different part variants within the EL817 series, all maintaining identical electrical specifications for the parameters listed.

Q: Is the EL817S1(A)(TU)-V available in Tape & Reel packaging?

A: Yes. The EL817S1(A)(TU)-V is specified with Tape & Reel (TR) packaging. Other EL817 variants listed do not specify packaging format in the provided data.

Q: Can I use HCPL-817-300E if HCPL-817-30AE is unavailable?

A: Both are active Broadcom products. The HCPL-817-300E has a wider current transfer ratio range (50% to 600% @ 5mA) compared to HCPL-817-30AE (80% to 160% @ 5mA). Circuit performance may differ due to different gain characteristics. Verify compatibility with your specific application requirements.

Q: Are all listed substitutes ROHS3 compliant?

A: Yes. All Everlight EL817 variants and Broadcom HCPL-817 parts listed are ROHS3 compliant with MSL Level 1 rating.

Q: What is the inventory status for substitute parts?

A: Everlight EL817 parametric equivalents have confirmed inventory ranging from 702 to 1112 pieces. Broadcom HCPL-817-300E has 1217 pieces and HCPL-817-30AE has 20200 pieces in stock.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message