H11B2 Optoisolator Equivalent & Substitute Parts

Part Overview

The H11B2 is a high-voltage optoisolator with Darlington output and integrated base connection, manufactured by Vishay Semiconductor Opto Division. This component provides 5300Vrms isolation in a single-channel configuration with 6-DIP through-hole packaging. The H11B2 is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and component procurement. Substitute parts must maintain electrical compatibility across isolation voltage, output type, channel configuration, and package form factor.

Substiute Parts

H11B2

Vishay Semiconductor Opto DivisionIn Stock: 2319H11B2 Datasheet

Current PartRFQ

H11B2

onsemiIn Stock: 2311H11B2 Datasheet

MFR RecommendedRFQ

H11B2

onsemiIn Stock: 2311H11B2 Datasheet

MFR RecommendedRFQ

MCA230

Isocom Components 2004 LTDIn Stock: 4291MCA230 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the H11B2 is determined by the following critical parameters:

• Voltage - Isolation: Must equal 5300Vrms to maintain high-voltage isolation performance
• Number of Channels: Must be 1 channel (single-channel configuration)
• Output Type: Must be Darlington with Base to preserve output stage compatibility
• Package / Case: Must be 6-DIP (0.300", 7.62mm) for direct board-level replacement
• Mounting Type: Must be Through Hole for PCB compatibility

Secondary parameters that support substitution decisions include Current Transfer Ratio (Min), Vce Saturation (Max), and Operating Temperature range. Parts meeting all critical parameters are classified as direct electrical and mechanical equivalents.

Parameter Comparison

Engineering Selection Recommendations

H11B2 (onsemi): This part is a direct equivalent to the original Vishay H11B2, matching all critical electrical and mechanical parameters. Although classified as obsolete, it maintains identical isolation voltage, output configuration, and package specifications. Selection is appropriate for applications requiring exact parameter matching with the original design.

MCA230 (Isocom Components): This part meets all critical substitution criteria with identical isolation voltage, single-channel Darlington output, and 6-DIP package configuration. The MCA230 is classified as Active product status, providing long-term availability and supply chain stability. The MCA230 features a higher maximum output voltage (30V versus 25V) and lower minimum current transfer ratio (100% @ 10mA versus 200% @ 1mA), making it suitable for applications with less stringent gain requirements. RoHS3 compliance and REACH Unaffected status align with regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can the H11B2 be replaced with the MCA230 in existing designs?

A: Yes. Both parts share identical isolation voltage (5300Vrms), single-channel configuration, Darlington with Base output type, and 6-DIP through-hole package. The MCA230 offers the additional advantage of Active product status for improved long-term availability.

Q: What is the significance of the Current Transfer Ratio difference between H11B2 and MCA230?

A: The H11B2 specifies 200% minimum current transfer ratio at 1mA input current, while the MCA230 specifies 100% at 10mA. Both values indicate sufficient gain for typical Darlington optoisolator applications. Selection depends on specific input current and output current requirements in the application circuit.

Q: Are there package compatibility concerns when substituting these parts?

A: No. All three parts use identical 6-DIP (0.300", 7.62mm) through-hole packaging, enabling direct PCB-level replacement without layout modifications.

Q: Why is the H11B2 (onsemi) listed as obsolete if it is electrically identical to the Vishay version?

A: Product status reflects manufacturer discontinuation decisions independent of electrical specifications. The onsemi H11B2 remains electrically equivalent but may have limited inventory availability. The MCA230 (Isocom) provides an active alternative with equivalent electrical performance.

Q: Do all substitute parts meet the same regulatory compliance standards?

A: The H11B2 (Vishay) and MCA230 (Isocom) are both ROHS3 Compliant and REACH Unaffected. The H11B2 (onsemi) compliance status is not specified in available documentation. Regulatory requirements should be confirmed with the specific manufacturer for the selected part.