SMF4L36A Equivalent & Substitute Parts

Part Overview

The SMF4L36A is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Bourns Inc., designed for telecom applications requiring transient overvoltage protection. This component features a 36V reverse standoff voltage with a 58.1V maximum clamping voltage and 400W peak pulse power rating in a surface mount SOD-123F package. The product status is listed as obsolete, necessitating identification of equivalent alternatives for ongoing design support and procurement requirements.

Substiute Parts

SMF4L36A

Bourns Inc.In Stock: 4460SMF4L36A Datasheet

Current PartRFQ

SMF4L36A

Bourns Inc.In Stock: 4460SMF4L36A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMF4L36A is determined by strict electrical and mechanical parameter matching within the Transient Voltage Suppressor category. The critical parameters that define substitution eligibility are:

Electrical Parameters:

• Voltage - Reverse Standoff: 36V (typical)
• Voltage - Breakdown (Minimum): 40V
• Voltage - Clamping (Maximum) @ Ipp: 58.1V
• Current - Peak Pulse (10/1000µs): 6.9A
• Power - Peak Pulse: 400W

Mechanical Parameters:

• Unidirectional configuration (1 channel)
• Surface mount mounting type
• SOD-123F package / SOD-123FL supplier package

Compliance Parameters:

• Operating temperature range: -55°C to 150°C (TJ)
• Moisture Sensitivity Level: 1 (Unlimited)
• REACH Status: REACH Unaffected

Alternative components must satisfy all electrical specifications within the defined ranges, maintain identical mechanical form factor and mounting characteristics, and comply with the same environmental and regulatory requirements.

Parameter Comparison

Engineering Selection Recommendations

The SMF4L36A is classified as an obsolete product. When selecting equivalent components, prioritize parts that maintain identical electrical specifications across all voltage and current parameters, as these directly determine transient suppression performance in telecom protection circuits.

Component selection should confirm:

1. Electrical Equivalence: The substitute part must provide identical reverse standoff voltage (36V), breakdown voltage (40V minimum), clamping voltage (58.1V maximum), peak pulse current (6.9A), and peak pulse power (400W) ratings.

2. Package Compatibility: The substitute must utilize the SOD-123F package in SOD-123FL supplier configuration to ensure mechanical fit and thermal characteristics in existing PCB layouts.

3. Environmental Compliance: The substitute must support the operating temperature range of -55°C to 150°C (TJ) and maintain MSL 1 (Unlimited) moisture sensitivity classification for storage and handling consistency.

4. Regulatory Compliance: The substitute must maintain REACH Unaffected status to ensure regulatory alignment with the original component specification.

Frequently Asked Questions (FAQ)

Q: What defines an acceptable substitute for the SMF4L36A?

A: An acceptable substitute must match all electrical parameters (36V reverse standoff, 40V minimum breakdown, 58.1V maximum clamping, 6.9A peak pulse current, 400W peak pulse power), maintain unidirectional zener diode configuration, use SOD-123F surface mount packaging, and support the -55°C to 150°C operating temperature range.

Q: Can I use a different voltage rating TVS diode as a substitute?

A: No. The voltage specifications (reverse standoff, breakdown, and clamping) are critical to circuit protection function. Substitutes must match these parameters exactly. Different voltage ratings will alter transient suppression characteristics and circuit protection performance.

Q: Is the SOD-123F package interchangeable with other TVS packages?

A: The SOD-123F package is specific to this component's mechanical and thermal design. Substitutes must use the identical SOD-123F package to ensure proper PCB fit, thermal dissipation, and circuit integration.

Q: Does the obsolete product status affect substitute selection?

A: Yes. The obsolete status indicates the original component is no longer manufactured. Substitute selection must prioritize components with current production status and established supply chains to ensure long-term availability and consistent quality.

Q: What is the significance of the MSL 1 (Unlimited) rating?

A: MSL 1 (Unlimited) indicates the component has no moisture sensitivity restrictions and does not require special storage or handling conditions. Substitutes must maintain this classification to preserve existing supply chain and assembly processes.

Q: Are there any application-specific considerations for telecom use?

A: The SMF4L36A is specified for telecom applications. Substitutes must maintain all electrical and environmental specifications to ensure equivalent protection performance in telecom circuit protection applications.