SMBJ24C Transient Voltage Suppressor - Equivalent & Substitute Parts

Part Overview

The SMBJ24C is a 600W bidirectional transient voltage suppressor (TVS) diode manufactured by Taiwan Semiconductor Corporation. This surface mount component operates at a 24V reverse standoff voltage with a 43V maximum clamping voltage and 14.6A peak pulse current. The device is housed in a DO-214AA (SMB) package and is designed for general-purpose transient voltage protection applications.

The SMBJ24C maintains active product status with 1156 units in current inventory. Equivalent and substitute parts are identified based on matching electrical specifications, package compatibility, and compliance certifications. Alternative sources become necessary for supply chain continuity, extended lead times, or regional availability requirements.

Key Parameters

Parameter	Value	Unit
Reverse Standoff Voltage (Typ)	24	V
Breakdown Voltage (Min)	26.7	V
Clamping Voltage (Max) @ Ipp	43	V
Peak Pulse Current (10/1000µs)	14.6	A
Peak Pulse Power	600	W
Package Type	DO-214AA, SMB	—
Mounting Type	Surface Mount	—
Operating Temperature Range	-55 to 150	°C (TJ)
Bidirectional Channels	1	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the SMBJ24C are qualified based on the following electrical and mechanical criteria:

Primary Substitution Criteria:

Reverse standoff voltage: 24V (nominal)
Breakdown voltage minimum: 26.7V
Package: DO-214AA or SMB equivalent
Mounting: Surface mount
Bidirectional configuration: Single channel
Peak pulse power: 600W
RoHS3 compliance

Secondary Compatibility Factors:

Clamping voltage range: 38.4V to 43V maximum
Peak pulse current: 14.6A to 16A
Operating temperature: -55°C to 150°C minimum
Moisture sensitivity level: 1 (Unlimited) preferred

Substitute parts maintain electrical equivalence within the specified parameter windows. Variations in clamping voltage (38.4V to 43V) and peak pulse current (14.6A to 16A) remain within acceptable design margins for general-purpose transient suppression applications. All qualified substitutes share identical package footprints and pinout configurations.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Reverse Standoff (V)	Breakdown Min (V)	Clamp Max @ Ipp (V)	Peak Pulse Current (A)	Peak Power (W)	Temp Range (°C)	Package	Status
SMBJ24C	Taiwan Semiconductor Corporation	24	26.7	43	14.6	600	-55 to 150	DO-214AA (SMB)	Active
1SMB24CA TR13 PBFREE	Central Semiconductor Corp	24	26.7	38.9	15.4	600	-65 to 150	DO-214AA (SMB)	Active
SMBJ24CA	MDD	24	26.7	38.9	15.5	600	-50 to 150	DO-214AA (SMB)	Active
SMBJ24CA-13-F	Diodes Incorporated	24	26.7	38.9	15.4	600	-55 to 150	DO-214AA (SMB)	Active
SMBJ24CA-E3/52	Vishay General Semiconductor - Diodes Division	24	26.7	38.9	15.4	600	-55 to 150	DO-214AA (SMBJ)	Active
SMBJ24CA-E3/5B	Vishay General Semiconductor - Diodes Division	24	26.7	38.9	15.4	600	-55 to 150	DO-214AA (SMBJ)	Active
SMBJ24CA-Q	Bourns Inc.	24	26.7	38.9	15.5	600	-55 to 150	DO-214AA (SMB)	Active
SMBJ24CA-TP	Micro Commercial Co	24	26.7	38.9	15.4	600	-55 to 175	DO-214AA (SMB)	Active
SMBJ24CA-TR	STMicroelectronics	24	26.7	38.9	16	600	-55 to 150	DO-214AA (SMB)	Active
SMBJ24CAHE3/52	Vishay General Semiconductor - Diodes Division	24	26.7	38.9	15.4	600	-55 to 150	DO-214AA (SMBJ)	Discontinued at DiGi Electronics
SMBJ24CD-M3/H	Vishay General Semiconductor - Diodes Division	24	27.1	38.4	15.6	600	-55 to 150	DO-214AA (SMBJ)	Active

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

The following parts provide direct electrical and mechanical equivalence to the SMBJ24C:

SMBJ24CA-13-F (Diodes Incorporated): Matches all critical parameters including clamping voltage (38.9V), peak pulse current (15.4A), and operating temperature range (-55°C to 150°C). Active product status with 24,200 units in inventory.
SMBJ24CA-E3/52 (Vishay TransZorb®): Identical electrical specifications with 15.4A peak pulse current and 38.9V clamping voltage. Active status with 3,051 units available.
SMBJ24CA-TR (STMicroelectronics TRANSIL™): Meets all substitution criteria with 16A peak pulse current and 38.9V clamping voltage. 30,200 units in stock.

Secondary Substitutes (Extended Temperature or Automotive Grade):

SMBJ24CA-TP (Micro Commercial Co): Extends operating temperature to 175°C maximum, suitable for high-temperature applications. 90,100 units in inventory.
SMBJ24CA-Q (Bourns Inc.): AEC-Q101 automotive qualified variant with 15.5A peak pulse current. Suitable for automotive and telecom applications. 16,078 units available.
SMBJ24CAHE3/52 (Vishay TransZorb®): AEC-Q101 automotive qualified with identical electrical specifications. Currently discontinued at DiGi Electronics; 1,755 units remain in inventory.

Alternative Voltage Specification:

SMBJ24CD-M3/H (Vishay TransZorb®): Breakdown voltage minimum of 27.1V (versus 26.7V) with 38.4V clamping voltage and 15.6A peak pulse current. Active status with 13,414 units in stock.

Lower Temperature Range Option:

1SMB24CA TR13 PBFREE (Central Semiconductor Corp): Extended lower temperature limit to -65°C with 15.4A peak pulse current and 38.9V clamping voltage. 5,011 units available.

All recommended substitutes maintain RoHS3 compliance and REACH unaffected status. Selection should prioritize active product status and inventory availability for supply chain optimization.

Frequently Asked Questions (FAQ)

Q: What electrical parameters must match for SMBJ24C substitution?

A: The reverse standoff voltage (24V), breakdown voltage minimum (26.7V), package type (DO-214AA/SMB), and bidirectional single-channel configuration must remain constant. Peak pulse power (600W) and mounting type (surface mount) are fixed requirements. Clamping voltage may vary between 38.4V and 43V, and peak pulse current between 14.6A and 16A within acceptable design margins.

Q: Are all substitute parts pin-compatible with SMBJ24C?

A: Yes. All qualified substitutes use the DO-214AA (SMB) package with identical pinout and footprint. Direct board-level replacement is possible without PCB modification.

Q: Can SMBJ24CA-TP be used in applications requiring -55°C minimum temperature?

A: Yes. SMBJ24CA-TP operates from -55°C to 175°C, exceeding the -55°C to 150°C range of SMBJ24C. The extended upper temperature limit provides additional thermal margin.

Q: What is the difference between SMBJ24CA-E3/52 and SMBJ24CA-E3/5B?

A: Both parts are electrically identical with 24V reverse standoff, 26.7V breakdown minimum, 38.9V clamping voltage, and 15.4A peak pulse current. Differences exist only in packaging tape specifications and supplier designations. Both are active products suitable for direct substitution.

Q: Is SMBJ24CAHE3/52 still available for new designs?

A: SMBJ24CAHE3/52 is discontinued at DiGi Electronics but remains in inventory (1,755 units). This part is AEC-Q101 automotive qualified. For new designs requiring automotive qualification, SMBJ24CA-Q (Bourns) or SMBJ24CA-TP (Micro Commercial Co) are recommended as active alternatives.

Q: How does SMBJ24CD-M3/H differ from other substitutes?

A: SMBJ24CD-M3/H has a slightly higher breakdown voltage minimum (27.1V versus 26.7V) and lower clamping voltage (38.4V versus 38.9V). These variations remain within acceptable design tolerances for general-purpose transient suppression. The part is electrically compatible but represents a different design variant within the SMBJ24 series.

Q: Which substitute offers the best inventory availability?

A: SMBJ24CA (MDD) provides the highest inventory level with 210,110 units in stock. SMBJ24CA-TP (Micro Commercial Co) offers 90,100 units. Both are active products with extended lead-time protection.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All qualified substitute parts maintain RoHS3 compliance. REACH status varies: most are REACH Unaffected, while SMBJ24CA-Q (Bourns) is REACH Affected. Compliance documentation should be verified for specific regulatory requirements.

Q: Can SMBJ24CA-Q be used in non-automotive applications?

A: Yes. SMBJ24CA-Q is AEC-Q101 qualified but not restricted to automotive use. The automotive qualification indicates higher reliability standards and extended testing. The part is suitable for general-purpose, telecom, and automotive applications.

Q: What is the significance of the -TR, -TP, and -Q suffixes?

A: These suffixes indicate packaging and qualification variants. -TR denotes Tape & Reel packaging, -TP indicates a specific manufacturer variant, and -Q denotes automotive qualification. All variants maintain identical electrical specifications within the SMBJ24 series.

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