SMBJ13 Equivalent & Substitute Parts

Part Overview

The SMBJ13 is a unidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. The device features a 13V reverse standoff voltage with a 22.58V maximum clamping voltage at peak pulse current, housed in a DO-214AA (SMB) package. The SMBJ13 is classified as obsolete, necessitating identification of active equivalent parts that maintain electrical and mechanical compatibility for ongoing production and repair applications.

Key Parameters

Parameter	Value	Unit
Reverse Standoff Voltage (Typ)	13	V
Breakdown Voltage (Min)	13.64	V
Clamping Voltage (Max) @ Ipp	22.58	V
Peak Pulse Current (10/1000µs)	28	A
Peak Pulse Power	600	W
Package / Case	DO-214AA, SMB	—
Mounting Type	Surface Mount	—
Operating Temperature Range	-65 to 150	°C (TJ)
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the SMBJ13 is determined by strict equivalence in the following electrical and mechanical parameters:

Reverse standoff voltage: 13V (nominal)
Breakdown voltage minimum: 13.64V or higher
Clamping voltage maximum @ Ipp: 21.5V to 23.8V range
Peak pulse current: 27.9A to 46.5A (maintains or exceeds original 28A specification)
Peak pulse power: 600W to 1000W (maintains or exceeds original 600W specification)
Package: DO-214AA / SMB (surface mount)
Unidirectional channels: 1
RoHS3 compliance required

Substitute parts are grouped by manufacturer and product status. All listed substitutes maintain active production status and are available in commercial quantities, ensuring supply chain continuity for the obsolete SMBJ13.

Parameter Comparison

Part Number	Manufacturer	Reverse Standoff (V)	Breakdown Min (V)	Clamping Max @ Ipp (V)	Peak Pulse Current (A)	Peak Pulse Power (W)	Package	Status
SMBJ13	Littelfuse Inc.	13	13.64	22.58	28	600	DO-214AA, SMB	Obsolete
SMBJ13A	MDD	13	14.4	21.5	28	600	DO-214AA, SMB	Active
SZ1SMB13AT3G	Littelfuse	13	14.4	21.5	27.9	600	DO-214AA, SMB	Active
SMB10J13A-E3/5B	Vishay General Semiconductor - Diodes Division	13	14.4	21.5	46.5	1000	DO-214AA, SMB	Active
SMBJ13A-E3/5B	Vishay General Semiconductor - Diodes Division	13	14.4	21.5	27.9	600	DO-214AA, SMB	Active
SMBJ13A-M3/52	Vishay General Semiconductor - Diodes Division	13	14.4	21.5	27.9	600	DO-214AA, SMB	Active
SMBJ13A-TP	Micro Commercial Co	13	14.4	21.5	27.9	600	DO-214AA, SMB	Active
SMBJ13E3/TR13	Microchip Technology	13	14.4	23.8	25.2	600	DO-214AA, SMB	Active
TV06B130J-G	Comchip Technology	13	14.4	21.5	27.91	600	DO-214AA, SMB	Active

Engineering Selection Recommendations

All substitute parts listed maintain ROHS3 compliance and MSL Level 1 (unlimited moisture sensitivity), matching the original SMBJ13 environmental specifications. Selection among active equivalents should prioritize:

Primary Tier (Closest Electrical Match): SMBJ13A (MDD), SZ1SMB13AT3G (Littelfuse), SMBJ13A-E3/5B (Vishay), SMBJ13A-M3/52 (Vishay), SMBJ13A-TP (Micro Commercial Co), and TV06B130J-G (Comchip) all maintain the original 28A peak pulse current specification with 21.5V clamping voltage, providing direct functional equivalence.

Secondary Tier (Enhanced Performance): SMB10J13A-E3/5B (Vishay) offers increased peak pulse current (46.5A) and power rating (1000W), suitable for applications requiring higher transient energy absorption while maintaining the 13V standoff voltage.

Alternative Consideration: SMBJ13E3/TR13 (Microchip) features a slightly elevated clamping voltage (23.8V) with reduced peak pulse current (25.2A), appropriate for applications with relaxed current requirements but tighter voltage regulation margins.

All substitute parts are available in active production status with commercial inventory levels, ensuring supply chain reliability for replacement and new production applications.

Frequently Asked Questions (FAQ)

Q: Can SMBJ13A directly replace SMBJ13 in existing designs?

A: Yes. SMBJ13A maintains identical reverse standoff voltage (13V), equivalent clamping voltage (21.5V vs. 22.58V), and matching peak pulse current (28A). The DO-214AA package and surface-mount configuration are identical. Electrical performance is functionally equivalent for general-purpose transient suppression applications.

Q: What is the difference between SMBJ13A and SMB10J13A-E3/5B?

A: Both maintain 13V standoff and 21.5V clamping voltage. SMB10J13A-E3/5B provides higher peak pulse current (46.5A vs. 28A) and peak pulse power (1000W vs. 600W), enabling suppression of larger transient events. Selection depends on the magnitude of transient energy in the application circuit.

Q: Are all substitute parts available in tape-and-reel packaging?

A: Most substitute parts are available in tape-and-reel (TR) packaging for automated assembly. SMBJ13A (MDD) is available in standard packaging. Verify specific packaging requirements with the component supplier for your production process.

Q: Does operating temperature range affect substitution compatibility?

A: The SMBJ13 operates from -65°C to 150°C. Most substitutes maintain this range or extend it (e.g., SMBJ13A-TP extends to 175°C). Substitutes with equal or wider temperature ranges are fully compatible. Verify application temperature requirements before selection.

Q: Why does SMBJ13E3/TR13 have different electrical specifications?

A: SMBJ13E3/TR13 (Microchip) maintains the 13V standoff voltage but features a higher clamping voltage (23.8V) and lower peak pulse current (25.2A). This part is suitable for applications where the circuit can tolerate higher clamping voltage but requires lower transient current suppression. It is not a direct replacement for all SMBJ13 applications.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant and MSL Level 1, matching the environmental compliance of the original SMBJ13. All parts are suitable for lead-free soldering processes.

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