MOCD217R1M Equivalent & Substitute Parts

Part Overview

The MOCD217R1M is a 2-channel optoisolator with transistor output manufactured by onsemi, rated for 2500Vrms isolation voltage. This component is classified as obsolete, which necessitates identification of equivalent and substitute parts for ongoing design support and procurement continuity. The part operates in the -40°C to 100°C temperature range and is packaged in 8-SOIC surface mount configuration.

Key Parameters

Parameter	Value
Manufacturer Part Number	MOCD217R1M
Manufacturer	onsemi
Category	Optoisolators
Number of Channels	2
Voltage - Isolation	2500Vrms
Current Transfer Ratio (Min)	100% @ 1mA
Turn On / Turn Off Time (Typ)	7.5µs, 5.7µs
Rise / Fall Time (Typ)	3.2µs, 4.7µs
Output Type	Transistor
Voltage - Output (Max)	30V
Current - Output / Channel	150mA
Vce Saturation (Max)	400mV
Operating Temperature	-40°C ~ 100°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the MOCD217R1M is determined by the following critical parameters:

Primary Substitution Criteria:

Number of Channels: 2
Output Type: Transistor
Mounting Type: Surface Mount
Package Type: 8-SOIC or compatible 8-pin surface mount

Secondary Compatibility Parameters:

Voltage - Isolation: Minimum 2500Vrms (higher ratings acceptable)
Current Transfer Ratio (Min): Minimum 100% @ 1mA or equivalent performance at specified test current
Voltage - Output (Max): Minimum 30V
Current - Output / Channel: Minimum 150mA
Vce Saturation (Max): 400mV or lower
Operating Temperature Range: Must encompass -40°C to 100°C

Substitute parts are grouped into two categories:

Category 1 - Parametric Equivalent (Direct Replacement): Parts with identical or superior electrical specifications and active product status. These maintain all critical performance parameters of the original part.

Category 2 - Similar Substitute (Enhanced Performance): Parts with higher isolation voltage ratings or improved switching characteristics. These provide enhanced performance margins but may require design verification for specific applications.

Parameter Comparison

Part Number	Manufacturer	Channels	Isolation Voltage	CTR (Min)	Output Voltage (Max)	Output Current / Ch	Vce Sat (Max)	Temp Range	Package	Status
MOCD217R1M	onsemi	2	2500Vrms	100% @ 1mA	30V	150mA	400mV	-40°C ~ 100°C	8-SOIC	Obsolete
MOCD217R2M	onsemi	2	2500Vrms	100% @ 1mA	30V	150mA	400mV	-40°C ~ 100°C	8-SOIC	Active
ACPL-227-500E	Broadcom Limited	2	3000Vrms	50% @ 5mA	80V	50mA	400mV	-55°C ~ 110°C	8-SOIC	Active
ACPL-227-50BE	Broadcom Limited	2	3000Vrms	130% @ 5mA	80V	50mA	400mV	-55°C ~ 110°C	8-SOIC	Active
ACPL-227-50CE	Broadcom Limited	2	3000Vrms	200% @ 5mA	80V	50mA	400mV	-55°C ~ 110°C	8-SOIC	Active
ACPL-227-560E	Broadcom Limited	2	3000Vrms	50% @ 5mA	80V	50mA	400mV	-55°C ~ 110°C	8-SOIC	Active
ACPL-227-56BE	Broadcom Limited	2	3000Vrms	130% @ 5mA	80V	50mA	400mV	-55°C ~ 110°C	8-SOIC	Active
ACPL-227-56CE	Broadcom Limited	2	3000Vrms	200% @ 5mA	80V	50mA	400mV	-55°C ~ 110°C	8-SOIC	Active
ILD205T	Vishay Semiconductor Opto Division	2	4000Vrms	40% @ 10mA	70V	Not specified	400mV	-55°C ~ 100°C	8-SOIC	Active
ILD206T	Vishay Semiconductor Opto Division	2	4000Vrms	63% @ 10mA	70V	Not specified	400mV	-55°C ~ 100°C	8-SOIC	Active
ILD211T	Vishay Semiconductor Opto Division	2	4000Vrms	20% @ 10mA	70V	Not specified	400mV	-55°C ~ 100°C	8-SOIC	Active

Engineering Selection Recommendations

Direct Replacement (Parametric Equivalent):

MOCD217R2M is the recommended direct replacement for MOCD217R1M. Both parts share identical electrical specifications including 2500Vrms isolation voltage, 100% minimum current transfer ratio at 1mA, 150mA output current per channel, and 8-SOIC packaging. MOCD217R2M is active product status with ROHS3 compliance, providing design continuity with improved supply availability.

Enhanced Performance Substitutes:

The Broadcom ACPL-227 series (ACPL-227-500E, ACPL-227-50BE, ACPL-227-50CE, ACPL-227-560E, ACPL-227-56BE, ACPL-227-56CE) offers 3000Vrms isolation voltage, exceeding the 2500Vrms requirement. These parts feature improved switching times (3µs turn-on/off versus 7.5µs/5.7µs) and extended operating temperature range (-55°C to 110°C). However, output current per channel is reduced to 50mA compared to 150mA of the original part. Selection among ACPL-227 variants depends on current transfer ratio requirements at 5mA test current.

The Vishay ILD series (ILD205T, ILD206T, ILD211T) provides 4000Vrms isolation voltage with 8-SOIC packaging. These parts feature improved switching characteristics but have lower current transfer ratios and unspecified output current ratings. Output voltage maximum is 70V, exceeding the 30V specification of MOCD217R1M.

All substitute parts listed are active product status with ROHS3 compliance and REACH unaffected designation.

Frequently Asked Questions (FAQ)

Q: Can MOCD217R2M be used as a direct replacement for MOCD217R1M?

A: Yes. MOCD217R2M is a parametric equivalent with identical electrical specifications. The primary difference is product status: MOCD217R1M is obsolete while MOCD217R2M is active. Both parts maintain 2500Vrms isolation, 100% minimum CTR at 1mA, 150mA output current per channel, and 8-SOIC packaging.

Q: What are the limitations of using ACPL-227 series as substitutes?

A: The ACPL-227 series provides higher isolation voltage (3000Vrms) and faster switching times, but output current per channel is limited to 50mA compared to 150mA in the MOCD217R1M. Applications requiring the full 150mA output current per channel cannot use ACPL-227 parts without circuit redesign.

Q: Are the Vishay ILD205T, ILD206T, and ILD211T compatible with MOCD217R1M?

A: These parts share 2-channel transistor output configuration and 8-SOIC packaging. However, they feature 4000Vrms isolation voltage and different current transfer ratio specifications. Output current ratings are not specified for ILD series. Design verification is required for applications with specific output current requirements.

Q: What is the significance of current transfer ratio test conditions?

A: Current transfer ratio is measured at specific input current levels. MOCD217R1M specifies 100% minimum CTR at 1mA input current. ACPL-227 and ILD series specify CTR at 5mA or 10mA input current. Direct comparison requires accounting for these different test conditions.

Q: Can I use higher isolation voltage rated parts as substitutes?

A: Yes, provided all other electrical parameters meet or exceed application requirements. Higher isolation voltage ratings provide additional safety margin. However, verify that output current, switching times, and temperature range specifications are compatible with your circuit design.

Q: What packaging considerations apply to these substitutes?

A: All listed substitutes use 8-pin surface mount packages (8-SOIC or 8-SO). Physical dimensions vary slightly: MOCD217R1M and Vishay ILD series use 0.154" width, while Broadcom ACPL-227 series use 0.173" width. Verify PCB footprint compatibility before design implementation.

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