SFH6316 Equivalent & Substitute Parts

Part Overview

The SFH6316 is an optoisolator transistor with base output manufactured by Vishay Semiconductor Opto Division. It provides 4000Vrms isolation in a single-channel configuration with transistor output and base connection. The device is classified as obsolete, making identification of suitable substitute components necessary for ongoing system support and new design implementations. The 8-SOIC surface mount package and DC input type define its primary application scope in isolated signal transmission circuits.

Substiute Parts

SFH6316

Vishay Semiconductor Opto DivisionIn Stock: 3462SFH6316 Datasheet

Current PartRFQ

HCPL-0501

Broadcom LimitedIn Stock: 5379HCPL-0501 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SFH6316 is determined by the following critical parameters:

• Single-channel optoisolator configuration
• Transistor output with base connection
• Isolation voltage rating (minimum 3750Vrms acceptable for applications not requiring full 4000Vrms)
• Current transfer ratio range compatible with 16mA input
• 8-pin SOIC surface mount package
• DC input type
• Operating temperature range -55°C to 100°C
• Output voltage and current specifications

The HCPL-0501 qualifies as a substitute based on matching channel count, output type, package footprint, input type, and operating temperature range. The isolation voltage is reduced to 3750Vrms, which represents a 6.25% decrease from the SFH6316 specification. Current transfer ratio minimum is 15% at 16mA, below the SFH6316 minimum of 19%, requiring circuit-level evaluation for applications with tight CTR tolerances.

Parameter Comparison

Engineering Selection Recommendations

The HCPL-0501 is the identified substitute for the obsolete SFH6316. Selection between these parts depends on specific application requirements and regulatory constraints:

HCPL-0501 Advantages: Active product status ensures ongoing availability and manufacturing support. Faster turn-on time (200ns vs. 600ns) provides improved switching performance in time-sensitive applications. Identical output current rating and operating temperature range maintain functional compatibility in most circuit topologies.

HCPL-0501 Limitations: Reduced isolation voltage (3750Vrms vs. 4000Vrms) requires confirmation that application isolation requirements do not mandate the full 4000Vrms specification. Lower minimum current transfer ratio (15% vs. 19%) necessitates circuit analysis for applications with tight CTR-dependent gain specifications. Reduced maximum output voltage (20V vs. 25V) must be evaluated against load voltage requirements. RoHS non-compliance status requires assessment against product regulatory requirements; the SFH6316 maintains ROHS3 compliance.

For applications requiring ROHS3 compliance or the full 4000Vrms isolation specification, alternative optoisolators outside the provided substitute list may be necessary.

Frequently Asked Questions (FAQ)

Q: Can the HCPL-0501 directly replace the SFH6316 in existing designs?

A: Pin-compatible replacement is possible due to identical 8-SOIC package footprint and matching pin assignments for single-channel transistor-output optoisolators. However, electrical parameter differences require circuit-level evaluation. The reduced isolation voltage and lower minimum CTR must be confirmed acceptable for the specific application before implementation.

Q: What is the significance of the isolation voltage difference between 4000Vrms and 3750Vrms?

A: Isolation voltage rating defines the maximum voltage differential that can be safely applied across the optoisolator's isolation barrier. The 250Vrms reduction represents a 6.25% decrease in isolation capability. Applications designed for 4000Vrms isolation must confirm that 3750Vrms meets safety and regulatory requirements before substitution.

Q: How does the current transfer ratio difference affect circuit performance?

A: Current transfer ratio (CTR) determines the output current magnitude relative to input current. The HCPL-0501 minimum CTR of 15% is 4 percentage points lower than the SFH6316 minimum of 19%. For circuits with input current of 16mA, this results in approximately 2.4mA lower minimum output current. Circuits with gain-dependent operation must verify that the lower CTR range remains within acceptable performance margins.

Q: Does the faster turn-on time of the HCPL-0501 create compatibility issues?

A: The HCPL-0501 turn-on time of 200ns is 400ns faster than the SFH6316. In most applications, faster switching improves performance. However, circuits with timing-dependent behavior or those relying on the SFH6316's switching delay characteristics should be evaluated to confirm that faster response does not introduce timing conflicts or signal integrity issues.

Q: What are the implications of RoHS compliance differences?

A: The SFH6316 is ROHS3 compliant; the HCPL-0501 is RoHS non-compliant. Products destined for markets or applications with mandatory RoHS compliance requirements cannot use the HCPL-0501 as a substitute. Compliance requirements must be confirmed before part selection.

Q: Are there package or mounting considerations for substitution?

A: Both parts use identical 8-SOIC surface mount packages with 0.154" (3.90mm) width. PCB footprints are compatible. No additional mounting or layout modifications are required for physical integration.