SMBJ15A-M3/5B Equivalent & Substitute Parts

Part Overview

The SMBJ15A-M3/5B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, part of the TransZorb® series. This surface mount component operates in the 15V reverse standoff category and is designed for general-purpose transient voltage suppression applications. The part is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Equivalent and substitute parts are identified based on matching electrical performance parameters and compatible packaging specifications. Substitution becomes necessary due to inventory availability, lead time requirements, or manufacturing source preferences while maintaining circuit performance integrity.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	15	V
Voltage - Breakdown (Min)	16.7	V
Voltage - Clamping (Max) @ Ipp	24.4	V
Current - Peak Pulse (10/1000µs)	24.6	A
Power - Peak Pulse	600	W
Operating Temperature Range	-55 to 150	°C (TJ)
Package / Case	DO-214AA, SMB	-
Mounting Type	Surface Mount	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitute parts for the SMBJ15A-M3/5B are classified based on electrical parameter equivalence and mechanical compatibility. The primary substitution criteria are:

Critical Matching Parameters:

Voltage - Reverse Standoff (Typ): 15V
Voltage - Clamping (Max) @ Ipp: 24.4V (±0.4V tolerance acceptable)
Current - Peak Pulse (10/1000µs): 24.6A (±1A tolerance acceptable)
Power - Peak Pulse: 600W
Package / Case: DO-214AA, SMB or equivalent surface mount footprint
Mounting Type: Surface Mount
Operating Temperature Range: -55°C to 150°C minimum

Packaging Variants: Substitutes may differ in tape format (Tape & Reel vs. Cut Tape & Digi-Reel®) without affecting electrical performance or circuit compatibility.

Manufacturer Variations: Parts from different manufacturers (Vishay, Littelfuse, EVVO Semi) are included when electrical specifications match within defined tolerances.

Parameter Comparison

Part Number	Manufacturer	Vwm (Typ) V	Vbr (Min) V	Vc (Max) @ Ipp V	Ipp (10/1000µs) A	Ppk W	Package	Temp Range °C	Inventory Pcs
SMBJ15A-M3/5B	Vishay	15	16.7	24.4	24.6	600	DO-214AA, SMB	-55 to 150	928
SMBJ15A-E3/52	Vishay	15	16.7	24.4	24.6	600	DO-214AA, SMB	-55 to 150	29400
SMBJ15A-E3/5B	Vishay	15	16.7	24.4	24.6	600	DO-214AA, SMB	-55 to 150	2748
SMBJ15D-M3/I	Vishay	15	17	24	25	600	DO-214AA, SMB	-55 to 150	6239
SMBJ15A (EVVO Semi)	EVVO Semi	15	16.7	24.4	24.6	600	DO-214AC, SMA	-65 to 150	35400
SZ1SMB15AT3G	Littelfuse	15	16.7	24.4	24	600	DO-214AA, SMB	-65 to 150	17712
SACB15	Littelfuse	15	16.7	23.6	20	500	DO-214AA, SMB	-55 to 150	14066

Engineering Selection Recommendations

Direct Equivalents (Identical Electrical Performance):

SMBJ15A-E3/52, SMBJ15A-E3/5B, and SMBJ15D-M3/I from Vishay maintain full electrical equivalence to the SMBJ15A-M3/5B. These parts differ only in packaging format (tape configuration) and are suitable for direct substitution in all applications. All three variants maintain ROHS3 compliance and MSL 1 rating.

Cross-Manufacturer Equivalents (Matched Specifications):

SZ1SMB15AT3G from Littelfuse provides electrical equivalence with identical voltage and power ratings. This part includes AEC-Q101 automotive qualification and extended temperature range (-65°C to 150°C), making it suitable for applications requiring automotive-grade components. Peak pulse current is 24A versus 24.6A on the primary part, representing a 2.4% variance within acceptable tolerance for general-purpose suppression circuits.

SMBJ15A from EVVO Semi matches all critical electrical parameters with extended operating temperature range (-65°C to 150°C). Package designation differs (DO-214AC, SMA vs. DO-214AA, SMB), requiring PCB footprint verification before substitution.

Limited Substitution (Parameter Variance):

SACB15 from Littelfuse exhibits reduced peak pulse current (20A vs. 24.6A) and lower peak pulse power (500W vs. 600W), representing 18.7% and 16.7% reductions respectively. This part is suitable only for applications with lower transient energy requirements and should not be used as a direct replacement in circuits designed for the full 600W specification.

Compliance Status:

All substitute parts maintain ROHS3 compliance. SZ1SMB15AT3G includes REACH Unaffected status, while SACB15 is REACH Affected. Verify regulatory requirements for your application before final selection.

Frequently Asked Questions (FAQ)

Q: Can SMBJ15A-E3/52 replace SMBJ15A-M3/5B directly?

A: Yes. Both parts are manufactured by Vishay with identical electrical specifications (15V standoff, 24.4V clamp, 24.6A peak pulse, 600W peak power). The difference is packaging format: SMBJ15A-E3/52 uses Cut Tape & Digi-Reel® while SMBJ15A-M3/5B uses Tape & Reel. Electrical performance and PCB footprint are identical.

Q: What is the difference between SMBJ15D-M3/I and SMBJ15A-M3/5B?

A: SMBJ15D-M3/I has slightly different electrical parameters: 17V breakdown minimum (vs. 16.7V), 24V clamping maximum (vs. 24.4V), and 25A peak pulse (vs. 24.6A). These represent minor variations within the 15V standoff category. Both parts are suitable for equivalent applications with identical package and temperature specifications.

Q: Can I use SZ1SMB15AT3G as a substitute?

A: Yes, with verification. SZ1SMB15AT3G from Littelfuse matches the 15V standoff and 24.4V clamping specifications. Peak pulse current is 24A (vs. 24.6A), a 2.4% reduction. The part includes AEC-Q101 automotive qualification and extended temperature range (-65°C to 150°C). Suitable for general-purpose and automotive applications.

Q: Is SACB15 a suitable replacement?

A: SACB15 is not recommended as a direct replacement. While it maintains the 15V standoff voltage, peak pulse current is reduced to 20A (18.7% lower) and peak pulse power is 500W (16.7% lower). Use SACB15 only in applications with lower transient energy specifications than the original design.

Q: Does package type affect electrical performance?

A: No. Packaging differences (Tape & Reel vs. Cut Tape & Digi-Reel®) do not affect electrical performance. However, package designation differences (DO-214AA vs. DO-214AC) may indicate different physical footprints. Verify PCB footprint compatibility when substituting parts with different package designations.

Q: Are all substitutes ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance. SZ1SMB15AT3G is REACH Unaffected, while SACB15 is REACH Affected. Verify REACH compliance requirements for your specific application and end market.

Q: What temperature range should I consider for substitution?

A: The primary part operates -55°C to 150°C. SZ1SMB15AT3G and SMBJ15A (EVVO Semi) offer extended range to -65°C, providing additional margin for extreme environment applications. All other substitutes maintain the -55°C to 150°C specification.

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