SMBJ17C-E3/5B Equivalent & Substitute Parts

Part Overview

The SMBJ17C-E3/5B is a transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, designed for general-purpose overvoltage protection in surface-mount applications. This component features a 17V reverse standoff voltage with a 30.5V maximum clamping voltage and 19.7A peak pulse current capability in a DO-214AA (SMB) package. The part is currently listed as obsolete, making equivalent substitutes necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	17	V
Voltage - Breakdown (Min)	18.9	V
Voltage - Clamping (Max) @ Ipp	30.5	V
Current - Peak Pulse (10/1000µs)	19.7	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

Substitution eligibility for the SMBJ17C-E3/5B is determined by the following critical parameters:

Voltage - Reverse Standoff (Typ): 17V
Voltage - Breakdown (Min): 18.9V
Package / Case: DO-214AA (SMB)
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)

Substitute parts must maintain identical reverse standoff voltage, breakdown voltage, and package configuration to ensure direct functional equivalence. Variations in clamping voltage and peak pulse current are acceptable within the same product family when the core protection parameters remain constant. All identified substitutes share the SMBJ17 base product number and are available in active production status or from authorized inventory.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (V)	Voltage - Breakdown (V)	Voltage - Clamping (V)	Current - Peak Pulse (A)	Operating Temp (°C)	Product Status	Packaging
SMBJ17C-E3/5B	Vishay	17	18.9	30.5	19.7	-55 to 150	Obsolete	Tape & Reel
SMBJ17CA-E3/5B	Vishay	17	18.9	27.6	21.7	-55 to 150	Active	Tape & Reel
SMBJ17CE3/TR13	Microchip Technology	17	18.9	30.5	19.7	-65 to 150	Active	Tape & Reel
SMBJ17CA	Meritek	17	18.9	27.6	21.74	-55 to 150	Active	Tape & Reel
SMBJ17CA-13-F	Diodes Incorporated	17	18.9	27.6	21.7	-55 to 150	Active	Tape & Reel
SMBJ17CA-TP	Micro Commercial Co	17	18.9	27.6	21.7	-55 to 175	Active	Tape & Reel
SMBJ17CAE3/TR13	Microchip Technology	17	18.9	27.6	21.7	-65 to 150	Active	Tape & Reel

Engineering Selection Recommendations

All listed substitute parts maintain the core electrical protection parameters (17V reverse standoff, 18.9V minimum breakdown) and DO-214AA package configuration required for direct replacement of the SMBJ17C-E3/5B.

For applications requiring identical clamping voltage and peak pulse current specifications, SMBJ17CE3/TR13 (Microchip Technology) provides the closest electrical match with active product status and extended operating temperature range (-65°C to 150°C).

For applications where clamping voltage variation between 27.6V and 30.5V is acceptable, SMBJ17CA-E3/5B (Vishay), SMBJ17CA (Meritek), SMBJ17CA-13-F (Diodes Incorporated), SMBJ17CA-TP (Micro Commercial Co), and SMBJ17CAE3/TR13 (Microchip Technology) are all suitable alternatives with active production status and full RoHS3 compliance.

SMBJ17CA-TP offers the widest operating temperature range (-55°C to 175°C), providing additional thermal margin for high-temperature applications.

All substitutes carry ROHS3 compliance and unlimited moisture sensitivity level (MSL 1), matching the original part's environmental certifications.

Frequently Asked Questions (FAQ)

Q: Can SMBJ17CA-E3/5B directly replace SMBJ17C-E3/5B?

A: Yes. Both parts share identical reverse standoff voltage (17V), breakdown voltage (18.9V), and DO-214AA package configuration. The primary difference is clamping voltage (27.6V vs. 30.5V) and peak pulse current (21.7A vs. 19.7A). SMBJ17CA-E3/5B is in active production status, whereas the original is obsolete.

Q: What is the significance of the clamping voltage difference?

A: Clamping voltage determines the maximum voltage the TVS diode allows across its terminals during a transient event. The SMBJ17C-E3/5B clamps at 30.5V maximum, while most substitutes clamp at 27.6V. Lower clamping voltage provides tighter protection but requires verification that the protected circuit can tolerate this lower threshold.

Q: Are all substitutes available in the same package?

A: Yes. All listed substitutes are available in DO-214AA (SMB) surface-mount package with Tape & Reel (TR) packaging, ensuring mechanical and assembly compatibility.

Q: Which substitute offers the best thermal performance?

A: SMBJ17CA-TP (Micro Commercial Co) supports the widest operating temperature range (-55°C to 175°C), providing the highest thermal margin compared to alternatives rated to 150°C maximum.

Q: Do all substitutes meet RoHS compliance requirements?

A: Yes. All listed substitutes are ROHS3 compliant with unlimited moisture sensitivity level (MSL 1), matching the environmental certifications of the original SMBJ17C-E3/5B.

Q: What is the difference between Vishay's SMBJ17C-E3/5B and SMBJ17CA-E3/5B?

A: Both are Vishay products with identical protection parameters. SMBJ17CA-E3/5B is the active production equivalent with slightly different clamping characteristics (27.6V vs. 30.5V) and higher peak pulse current (21.7A vs. 19.7A). The "CA" designation indicates the updated variant.

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