MSMBJSAC12E3 Equivalent & Substitute Parts

Part Overview

The MSMBJSAC12E3 is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Microchip Technology, designed for general-purpose overvoltage protection applications. This surface-mount component features a 12V reverse standoff voltage with a 19V maximum clamping voltage and 25A peak pulse current capability. The device is actively produced and maintains full compliance with military-grade qualifications and RoHS3 standards. Substitute parts are identified to provide alternative sourcing options while maintaining electrical and mechanical compatibility for circuit protection applications.

Substiute Parts

MSMBJSAC12E3

Microchip TechnologyIn Stock: 1134MSMBJSAC12E3 Datasheet

Current PartRFQ

SACB12

Littelfuse Inc.In Stock: 4130SACB12 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MSMBJSAC12E3 are identified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Critical Matching Parameters:

• Voltage - Reverse Standoff (Typ): 12V
• Voltage - Clamping (Max) @ Ipp: 19V
• Current - Peak Pulse (10/1000µs): 25A
• Power - Peak Pulse: 500W
• Package / Case: DO-214AA, SMB (surface mount)
• Mounting Type: Surface Mount
• Unidirectional Zener diode configuration
• RoHS3 Compliance
• MSL Rating: 1 (Unlimited)

The SACB12 manufactured by Littelfuse Inc. meets all critical electrical parameters and maintains identical package specifications, enabling direct substitution in circuit applications requiring 12V standoff voltage TVS protection with 25A peak pulse current handling.

Parameter Comparison

*SACB12 operates within -55°C to 150°C range, which covers the upper portion of MSMBJSAC12E3's -65°C to 150°C range. Applications requiring operation below -55°C require the MSMBJSAC12E3.

Engineering Selection Recommendations

MSMBJSAC12E3 (Microchip Technology) is the primary selection for applications requiring:

• Extended low-temperature operation down to -65°C
• Military-grade qualification (MIL-PRF-19500)
• Specified capacitance parameter (30pF @ 1MHz)

SACB12 (Littelfuse Inc.) is a suitable substitute for applications where:

• Operating temperature range of -55°C to 150°C is acceptable
• Extended low-temperature performance below -55°C is not required
• Both devices maintain identical electrical protection characteristics
• Both devices carry ROHS3 compliance and unlimited moisture sensitivity rating

Both parts are active products with confirmed inventory availability and maintain full regulatory compliance for general-purpose transient voltage suppression applications.

Frequently Asked Questions (FAQ)

Q: Can SACB12 be used as a direct replacement for MSMBJSAC12E3 in all applications?

A: SACB12 provides direct electrical substitution for applications operating within the -55°C to 150°C temperature range. Applications requiring operation below -55°C must use MSMBJSAC12E3. Both devices are identical in voltage clamping, peak pulse current, power dissipation, and package configuration.

Q: What is the difference in operating temperature range between these parts?

A: MSMBJSAC12E3 operates from -65°C to 150°C, while SACB12 operates from -55°C to 150°C. The MSMBJSAC12E3 provides an additional 10°C of low-temperature capability. For applications with minimum operating temperatures above -55°C, both parts are equivalent.

Q: Are the package specifications identical?

A: Yes. Both MSMBJSAC12E3 and SACB12 use the DO-214AA surface-mount package (SMB designation). They are mechanically and electrically compatible for PCB assembly and soldering processes.

Q: Do both parts meet the same compliance standards?

A: Both parts are ROHS3 compliant with MSL rating of 1 (Unlimited). MSMBJSAC12E3 carries additional military-grade qualification (MIL-PRF-19500). For applications requiring military qualification, MSMBJSAC12E3 is the specified part.

Q: What is the significance of the 30pF capacitance specification?

A: The MSMBJSAC12E3 specifies 30pF capacitance at 1MHz. This parameter is not provided for SACB12. For applications where capacitance characteristics are critical to circuit performance, the MSMBJSAC12E3 datasheet should be consulted for detailed frequency-dependent behavior.

Q: Can these parts be used interchangeably in high-frequency applications?

A: Both parts are rated for general-purpose transient voltage suppression. The MSMBJSAC12E3 provides specified capacitance data (30pF @ 1MHz), which may be relevant for high-frequency circuit analysis. SACB12 capacitance specifications are not provided in the available parameters.

Q: What inventory considerations apply to these parts?

A: MSMBJSAC12E3 is available in Bulk packaging with 1050 pieces in stock. SACB12 is available in Cut Tape (CT) and Digi-Reel® packaging with 4100 pieces in stock. Packaging format selection depends on assembly process requirements and order quantity.