SMBJ17A-M3/52 Equivalent & Substitute Parts

Part Overview

The SMBJ17A-M3/52 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 DO-214AA (SMB) package and is designed for general-purpose transient voltage suppression applications. The part is active and in production, with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Equivalent and substitute parts are identified based on matching electrical performance parameters: reverse standoff voltage, breakdown voltage, clamping voltage, peak pulse current, and power dissipation capability. Mechanical compatibility is ensured through identical or functionally equivalent packaging specifications.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	17	V
Voltage - Breakdown (Min)	18.9	V
Voltage - Clamping (Max) @ Ipp	27.6	V
Current - Peak Pulse (10/1000µs)	21.7	A
Power - Peak Pulse	600	W
Operating Temperature Range	-55 to 150	°C (TJ)
Package / Case	DO-214AA, SMB	—
Mounting Type	Surface Mount	—
Type	Zener	—
Unidirectional Channels	1	—

Substitute Part Grouping Explanation

Substitute parts for the SMBJ17A-M3/52 are classified into two categories based on electrical parameter alignment:

Category 1: Direct Electrical Equivalents Parts that maintain identical or near-identical electrical specifications across all critical parameters: reverse standoff voltage (17V), breakdown voltage (18.9V minimum), clamping voltage (27.6V maximum), peak pulse current (21.7A nominal), and peak pulse power (600W). These parts are mechanically compatible in DO-214AA (SMB) surface mount packages and support the same operating temperature range (-55°C to 150°C).

Category 2: Functional Alternatives Parts with voltage ratings adjacent to the main part (16V or 18V standoff) that provide alternative transient suppression characteristics. These parts maintain the same package form factor and power rating but operate at different voltage thresholds. Selection depends on circuit voltage requirements and transient protection specifications.

Parameter Comparison

Part Number	Manufacturer	Standoff Voltage (V)	Breakdown Min (V)	Clamp Voltage Max (V)	Peak Pulse Current (A)	Peak Pulse Power (W)	Package	Operating Temp (°C)
SMBJ17A-M3/52	Vishay	17	18.9	27.6	21.7	600	DO-214AA (SMB)	-55 to 150
SMBJ17D-M3/H	Vishay	17	19.2	27.2	22.1	600	DO-214AA (SMB)	-55 to 150
SMBJ17A-E3/52	Vishay	17	18.9	27.6	21.7	600	DO-214AA (SMB)	-55 to 150
SMBJ17A	Meritek	17	18.9	27.6	21.74	600	DO-214AA (SMB)	-55 to 150
SMBJ16A	EVVO Semi	16	17.8	26	23.1	600	DO-214AC (SMA)	-65 to 150
SMBJ18A	EVVO Semi	18	20	29.2	20.6	600	DO-214AC (SMA)	-65 to 150

Engineering Selection Recommendations

Direct Substitutes (Preferred)

SMBJ17A-E3/52 (Vishay) and SMBJ17A (Meritek) are direct electrical equivalents to SMBJ17A-M3/52. Both maintain identical standoff voltage (17V), breakdown voltage (18.9V minimum), and clamping voltage (27.6V maximum) specifications. All three parts are ROHS3 compliant with MSL 1 rating and active product status. SMBJ17A-E3/52 is available in higher inventory (45,300 units) compared to the main part (878 units).

SMBJ17D-M3/H (Vishay) operates at the same 17V standoff voltage with marginally different electrical characteristics: breakdown voltage increases to 19.2V minimum, clamping voltage reduces to 27.2V maximum, and peak pulse current increases to 22.1A. This part maintains identical package specifications and temperature range. All Vishay parts share the same series designation and compliance certifications.

Functional Alternatives

SMBJ16A (EVVO Semi) provides 16V standoff voltage protection with 26V clamping voltage and 23.1A peak pulse current. This part operates across an extended temperature range (-65°C to 150°C) but uses DO-214AC (SMA) package, which differs mechanically from the DO-214AA (SMB) main part.

SMBJ18A (EVVO Semi) provides 18V standoff voltage protection with 29.2V clamping voltage and 20.6A peak pulse current. This part also uses DO-214AC (SMA) package and extended temperature range (-65°C to 150°C).

Selection of functional alternatives requires verification that circuit voltage requirements and transient protection thresholds align with the different standoff voltage ratings.

Frequently Asked Questions (FAQ)

Q: Can SMBJ17A-E3/52 replace SMBJ17A-M3/52 directly?

A: Yes. Both parts share identical electrical specifications: 17V standoff voltage, 18.9V minimum breakdown voltage, 27.6V maximum clamping voltage, and 21.7A peak pulse current. Both use DO-214AA (SMB) surface mount packages and operate across -55°C to 150°C. The primary difference is packaging format (Tape & Reel for both), with SMBJ17A-E3/52 offering higher inventory availability.

Q: What is the difference between SMBJ17D-M3/H and SMBJ17A-M3/52?

A: Both parts maintain 17V standoff voltage and identical package specifications (DO-214AA, SMB). SMBJ17D-M3/H exhibits slightly higher breakdown voltage (19.2V minimum versus 18.9V), lower clamping voltage (27.2V maximum versus 27.6V), and higher peak pulse current (22.1A versus 21.7A). These variations remain within the functional tolerance of the 17V protection class.

Q: Can SMBJ16A or SMBJ18A be used as substitutes?

A: SMBJ16A and SMBJ18A are functional alternatives, not direct equivalents. They operate at different standoff voltages (16V and 18V respectively) and use different package types (DO-214AC/SMA versus DO-214AA/SMB). Selection requires circuit-level verification that the alternative voltage threshold meets transient protection requirements. Both parts maintain 600W peak pulse power and ROHS3 compliance.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance certification. All parts maintain MSL 1 (unlimited moisture sensitivity) rating and active product status.

Q: What packaging differences exist between substitute options?

A: SMBJ17A-M3/52, SMBJ17D-M3/H, and SMBJ17A use DO-214AA (SMB) surface mount packages. SMBJ16A and SMBJ18A use DO-214AC (SMA) surface mount packages. Package selection affects PCB layout and footprint compatibility. Verify mechanical fit before substitution.

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