H11D1 Optoisolator Equivalent & Substitute Parts

Part Overview

The H11D1 is a 6-DIP optoisolator transistor with base output manufactured by onsemi, featuring 5300Vrms isolation voltage and single-channel configuration. This component is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement continuity. The H11D1 serves applications requiring galvanic isolation with transistor output capability in through-hole mounting configurations.

Key Parameters

Parameter	Value
Manufacturer Part Number	H11D1
Manufacturer	onsemi
Category	Optoisolators
Package / Case	6-DIP (0.300", 7.62mm)
Voltage - Isolation	5300Vrms
Number of Channels	1
Output Type	Transistor with Base
Current Transfer Ratio (Min)	20% @ 10mA
Voltage - Output (Max)	300V
Current - Output / Channel	100mA
Operating Temperature	-55°C ~ 100°C
Mounting Type	Through Hole
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the H11D1 is determined by the following critical parameters:

Package compatibility: 6-DIP (0.300", 7.62mm) form factor for direct board-level replacement
Isolation voltage: Minimum 4170Vrms to maintain electrical isolation requirements
Output configuration: Transistor with base output for circuit interface compatibility
Single-channel architecture: One isolated channel per device
DC input type: Direct current signal isolation
Current handling: 100mA output current per channel
Mounting method: Through-hole technology for PCB integration

The H11D1M qualifies as a direct substitute based on matching all critical parameters. Both parts share identical package geometry, output stage configuration, and electrical interface specifications. The primary distinction is isolation voltage rating (5300Vrms for H11D1 versus 4170Vrms for H11D1M) and product status (obsolete versus active).

Parameter Comparison

Parameter	H11D1	H11D1M
Manufacturer	onsemi	onsemi
Voltage - Isolation	5300Vrms	4170Vrms
Number of Channels	1	1
Current Transfer Ratio (Min)	20% @ 10mA	20% @ 10mA
Turn On / Turn Off Time (Typ)	5µs, 5µs	5µs, 5µs
Input Type	DC	DC
Output Type	Transistor with Base	Transistor with Base
Voltage - Output (Max)	300V	300V
Current - Output / Channel	100mA	100mA
Voltage - Forward (Vf) (Typ)	1.15V	1.15V
Current - DC Forward (If) (Max)	80mA	80mA
Vce Saturation (Max)	400mV	400mV
Operating Temperature	-55°C ~ 100°C	-40°C ~ 100°C
Package / Case	6-DIP (0.300", 7.62mm)	6-DIP (0.300", 7.62mm)
Mounting Type	Through Hole	Through Hole
Product Status	Obsolete	Active
REACH Status	REACH Unaffected	REACH Unaffected
ECCN	EAR99	EAR99

Engineering Selection Recommendations

The H11D1M represents the primary substitute for the obsolete H11D1. Both components maintain identical electrical interface specifications and package geometry, enabling direct replacement in existing PCB designs. The H11D1M carries active product status with ROHS3 compliance certification, providing long-term supply assurance and regulatory alignment for new production.

The isolation voltage differential (4170Vrms for H11D1M versus 5300Vrms for H11D1) requires circuit-level evaluation. Applications operating at isolation voltages below 4170Vrms can implement H11D1M without modification. Designs requiring 5300Vrms isolation must confirm alternative component availability through the manufacturer or authorized distributors.

Both parts maintain REACH Unaffected status and EAR99 export classification, ensuring consistent regulatory compliance across substitution scenarios.

Frequently Asked Questions (FAQ)

Q: Can H11D1M directly replace H11D1 in existing designs?

A: Yes, for applications operating at isolation voltages of 4170Vrms or below. The H11D1M shares identical package geometry (6-DIP), output configuration (transistor with base), current handling (100mA), and switching characteristics (5µs turn-on/off time). Direct PCB-level substitution is possible without circuit redesign.

Q: What is the isolation voltage difference between H11D1 and H11D1M?

A: H11D1 provides 5300Vrms isolation, while H11D1M provides 4170Vrms isolation. This 1130Vrms difference must be evaluated against circuit isolation requirements. If the design margin permits operation at 4170Vrms, H11D1M is suitable. Higher isolation requirements necessitate alternative component sourcing.

Q: Are there packaging differences between H11D1 and H11D1M?

A: No. Both components use 6-DIP (0.300", 7.62mm) through-hole packaging. Pin configuration and board footprint are identical, enabling direct mechanical and electrical substitution.

Q: What is the operating temperature range difference?

A: H11D1 operates from -55°C to 100°C, while H11D1M operates from -40°C to 100°C. Applications requiring operation below -40°C must use H11D1 or identify alternative components. Standard industrial temperature ranges (-40°C to 85°C) are supported by both parts.

Q: Does H11D1M have better compliance status than H11D1?

A: H11D1M carries ROHS3 compliance certification and active product status, compared to H11D1's obsolete classification. For new designs and production continuity, H11D1M provides superior long-term availability and regulatory alignment.

Q: Are the electrical characteristics identical between H11D1 and H11D1M?

A: Yes. Both parts maintain 20% minimum current transfer ratio at 10mA, 300V maximum output voltage, 100mA output current, 1.15V typical forward voltage, and 400mV maximum Vce saturation. Switching performance (5µs turn-on and turn-off time) is identical.

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