HCPL-253L#500 Equivalent & Substitute Parts

Part Overview

The HCPL-253L#500 is a 2-channel optoisolator with transistor output manufactured by Broadcom Limited, rated for 3750Vrms isolation voltage. This component is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement. The part operates across the industrial temperature range of -55°C to 100°C and is designed for DC input applications requiring galvanic isolation in 8-DIP Gull Wing surface mount packaging.

Key Parameters

Parameter	Value
Manufacturer Part Number	HCPL-253L#500
Manufacturer	Broadcom Limited
Category	Optoisolators
Number of Channels	2
Voltage - Isolation	3750Vrms
Current Transfer Ratio (Min)	19% @ 16mA
Current Transfer Ratio (Max)	50% @ 16mA
Turn On / Turn Off Time (Typ)	200ns, 600ns
Output Type	Transistor
Voltage - Output (Max)	7V
Current - Output / Channel	8mA
Voltage - Forward (Vf) (Typ)	1.5V
Current - DC Forward (If) (Max)	25mA
Operating Temperature	-55°C ~ 100°C
Package / Case	8-SMD, Gull Wing
Product Status	Discontinued at DiGi Electronics
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution of the HCPL-253L#500 is determined by the following critical parameters: number of channels (2), output type (transistor), operating temperature range (-55°C to 100°C), package type (8-SMD Gull Wing), input type (DC), and output current capability (8mA per channel). The isolation voltage rating and current transfer ratio define performance boundaries within which alternatives may operate.

Substitute parts are grouped into two categories:

Category 1: Direct Parametric Equivalents (Broadcom HCPL-253L Series) Parts maintaining identical isolation voltage (3750Vrms), current transfer ratio range (19-50% @ 16mA), and switching times. These include HCPL-253L-500E, which differs only in packaging format (Tape & Reel) and compliance status (ROHS3 Compliant vs. RoHS non-compliant).

Category 2: Functional Alternatives with Modified Isolation Voltage Parts with lower isolation voltage (2500Vrms) or higher isolation voltage (5300Vrms) but maintaining 2-channel configuration, transistor output, 8-SMD Gull Wing package, 8mA output current, and -55°C to 100°C operating temperature. These include HCPL2530S, HCPL2530SD, HCPL2531SDV (2500Vrms), and SFH6325-X017T, SFH6326-X007, SFH6326-X009, SFH6326-X009T, SFH6326-X017, SFH6326-X017T (5300Vrms).

Parameter Comparison

Part Number	Manufacturer	Isolation Voltage	Channels	CTR Min @ 16mA	CTR Max @ 16mA	Turn On / Turn Off (ns)	Output Voltage Max	Output Current	Vf (Typ)	Package	Product Status	RoHS Status
HCPL-253L#500	Broadcom Limited	3750Vrms	2	19%	50%	200, 600	7V	8mA	1.5V	8-SMD, Gull Wing	Discontinued	RoHS non-compliant
HCPL-253L-500E	Broadcom Limited	3750Vrms	2	19%	50%	200, 600	7V	8mA	1.5V	8-SMD, Gull Wing	Active	ROHS3 Compliant
HCPL2530S	onsemi	2500Vrms	2	7%	50%	450, 500	20V	8mA	1.45V	8-SMD, Gull Wing	Obsolete	ROHS3 Compliant
HCPL2530SD	Fairchild Semiconductor	2500Vrms	2	7%	50%	450, 500	20V	8mA	1.45V	8-SMD, Gull Wing	Active	Not specified
HCPL2531SDV	Fairchild Semiconductor	2500Vrms	2	19%	50%	450, 300	20V	8mA	1.45V	8-SMD, Gull Wing	Active	Not specified
SFH6325-X017T	Vishay Semiconductor Opto Division	5300Vrms	2	7%	Not specified	300, 600	25V	8mA	1.33V	8-SMD, Gull Wing	Active	ROHS3 Compliant
SFH6326-X007	Vishay Semiconductor Opto Division	5300Vrms	2	19%	Not specified	200, 500	25V	8mA	1.33V	8-SMD, Gull Wing	Active	ROHS3 Compliant
SFH6326-X009	Vishay Semiconductor Opto Division	5300Vrms	2	19%	Not specified	200, 500	25V	8mA	1.33V	8-SMD, Gull Wing	Active	ROHS3 Compliant
SFH6326-X009T	Vishay Semiconductor Opto Division	5300Vrms	2	19%	Not specified	200, 500	25V	8mA	1.33V	8-SMD, Gull Wing	Active	ROHS3 Compliant
SFH6326-X017	Vishay Semiconductor Opto Division	5300Vrms	2	19%	Not specified	200, 500	25V	8mA	1.33V	8-SMD, Gull Wing	Active	ROHS3 Compliant
SFH6326-X017T	Vishay Semiconductor Opto Division	5300Vrms	2	19%	Not specified	200, 500	25V	8mA	1.33V	8-SMD, Gull Wing	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: HCPL-253L-500E This part is the direct parametric equivalent of HCPL-253L#500, maintaining identical electrical specifications including 3750Vrms isolation voltage, 19-50% current transfer ratio, and 200ns/600ns switching times. HCPL-253L-500E is currently Active in product status and ROHS3 Compliant, addressing regulatory requirements where the original part does not. Packaging differs only in format (Tape & Reel vs. standard packaging), which does not affect electrical performance.

Secondary Recommendations: HCPL2531SDV This part maintains the 19% minimum current transfer ratio matching the original specification and operates within the same temperature range and package configuration. It is currently Active and offers 2500Vrms isolation voltage with improved turn-off time (300ns vs. 600ns). The higher maximum output voltage (20V vs. 7V) provides additional design margin.

Alternative for Enhanced Isolation: SFH6326-X017T For applications requiring higher isolation voltage, SFH6326-X017T provides 5300Vrms isolation with 19% minimum current transfer ratio, 200ns turn-on time, and Active product status with ROHS3 compliance. The higher output voltage rating (25V) and lower forward voltage (1.33V) offer performance advantages in high-isolation applications.

Consideration: HCPL2530SD This part is currently Active with bulk packaging availability and maintains core electrical parameters. However, it exhibits lower minimum current transfer ratio (7% vs. 19%), which may impact circuit performance in applications sensitive to CTR variation.

Frequently Asked Questions (FAQ)

Q: Can HCPL-253L-500E directly replace HCPL-253L#500 without circuit modification? A: Yes. HCPL-253L-500E maintains identical electrical specifications including isolation voltage, current transfer ratio range, switching times, output voltage, and output current. The only difference is packaging format (Tape & Reel) and improved RoHS compliance status.

Q: What is the key difference between 3750Vrms and 2500Vrms isolation voltage options? A: Isolation voltage determines the maximum voltage differential that can be safely applied across the optoisolator without breakdown. The HCPL-253L#500 operates at 3750Vrms. Substitutes rated at 2500Vrms provide lower isolation capability and are suitable only for applications not requiring the full 3750Vrms rating. Substitutes rated at 5300Vrms exceed the original specification and are suitable for all applications requiring 3750Vrms or less.

Q: How does current transfer ratio (CTR) affect substitution compatibility? A: CTR defines the ratio of output current to input current. The HCPL-253L#500 specifies 19-50% CTR @ 16mA. Substitutes with identical or higher minimum CTR (19% or greater) maintain equivalent circuit performance. Parts with lower minimum CTR (7%) may require circuit redesign to compensate for reduced output current.

Q: Are there packaging differences between substitute options? A: All listed substitutes maintain the 8-SMD Gull Wing package configuration. Differences exist in supplier packaging format: Tape & Reel (TR), Tube, or Bulk. These packaging formats do not affect electrical performance or PCB mounting compatibility.

Q: What is the significance of product status (Active vs. Obsolete vs. Discontinued)? A: Active status indicates current manufacturing and availability. Discontinued status indicates the part is no longer produced by the original manufacturer. Obsolete status indicates the part has reached end-of-life. For long-term design support, Active parts are preferred.

Q: Does RoHS compliance affect electrical performance? A: RoHS compliance does not affect electrical performance. ROHS3 Compliant parts meet regulatory requirements for hazardous substance restrictions. RoHS non-compliant parts may face procurement restrictions in regulated markets.

Q: Can SFH6326 series parts with 5300Vrms isolation be used in place of 3750Vrms parts? A: Yes. Higher isolation voltage ratings are backward compatible with lower voltage requirements. SFH6326 series parts rated at 5300Vrms can be used in any application designed for 3750Vrms or lower isolation voltage.

Q: What switching time differences exist between substitutes? A: The HCPL-253L#500 specifies 200ns turn-on and 600ns turn-off. HCPL2531SDV offers faster turn-off (300ns). SFH6326 series parts offer 200ns turn-on with 500ns turn-off. Faster switching times reduce propagation delay and may improve circuit performance in high-speed applications.

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