SMBJ33CA-13 Equivalent & Substitute Parts

Part Overview

The SMBJ33CA-13 is a 33V Transient Voltage Suppressor (TVS) diode manufactured by Diodes Incorporated in SMB (DO-214AA) surface mount package. This bidirectional Zener diode provides transient voltage protection with a 53.3V maximum clamping voltage and 11.3A peak pulse current rating for general-purpose applications.

The SMBJ33CA-13 is currently discontinued at DiGi Electronics. Equivalent and substitute parts are available from multiple manufacturers with identical or compatible electrical specifications and the same surface mount package configuration, ensuring direct board-level compatibility.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	33	V
Voltage - Breakdown (Min)	36.7	V
Voltage - Clamping (Max) @ Ipp	53.3	V
Current - Peak Pulse (10/1000µs)	11.3	A
Power - Peak Pulse	600	W
Operating Temperature Range	-55°C to 150°C	TJ
Package / Case	DO-214AA, SMB	—
Mounting Type	Surface Mount	—
Bidirectional Channels	1	—
Type	Zener	—

Substitute Part Grouping Explanation

Substitute parts for the SMBJ33CA-13 are qualified based on the following electrical and mechanical parameters:

Critical Matching Parameters:

Voltage - Reverse Standoff: 33V
Voltage - Clamping (Max) @ Ipp: 53.3V (±tolerance acceptable)
Current - Peak Pulse (10/1000µs): 11.3A (±tolerance acceptable)
Power - Peak Pulse: 600W
Package / Case: DO-214AA, SMB
Mounting Type: Surface Mount
Bidirectional Channels: 1
Type: Zener

All substitute parts listed maintain these core electrical specifications and physical package compatibility. Variations in operating temperature range, peak pulse current within tolerance (11.3A to 11.8A), and clamping voltage within tolerance (52.5V to 53.3V) are acceptable for direct substitution.

Parameter Comparison

Part Number	Manufacturer	Voltage Standoff (V)	Voltage Clamp Max (V)	Current Peak (A)	Power Peak (W)	Temp Range (°C)	Package	Status
SMBJ33CA-13	Diodes Incorporated	33	53.3	11.3	600	-55 to 150	DO-214AA, SMB	Discontinued
SMBJ33CA-13-F	Diodes Incorporated	33	53.3	11.3	600	-55 to 150	DO-214AA, SMB	Active
SMBJ33CA-TP	Micro Commercial Co	33	53.3	11.3	600	-55 to 175	DO-214AA, SMB	Active
1SMB33CA TR13 PBFREE	Central Semiconductor Corp	33	53.3	11.3	600	-65 to 150	DO-214AA, SMB	Active
SMBJ33CA	MDD	33	53.3	11.3	600	-50 to 150	DO-214AA, SMB	Active
SMBJ33CA R5G	Taiwan Semiconductor Corporation	33	53.3	11.8	600	-55 to 150	DO-214AA, SMB	Discontinued
SMBJ33CA-E3/52	Vishay General Semiconductor - Diodes Division	33	53.3	11.3	600	-55 to 150	DO-214AA, SMB	Active
SMBJ33CA-E3/5B	Vishay General Semiconductor - Diodes Division	33	53.3	11.3	600	-55 to 150	DO-214AA, SMB	Active
SMBJ33CA-Q	Bourns Inc.	33	53.3	11.3	600	-55 to 150	DO-214AA, SMB	Active
SMBJ33CAE3/TR13	Microchip Technology	33	53.3	11.3	600	-65 to 150	DO-214AA, SMB	Active
SMBJ33CD-M3/H	Vishay General Semiconductor - Diodes Division	33	52.5	11.5	600	-55 to 150	DO-214AA, SMB	Active

Engineering Selection Recommendations

Primary Recommendation - Direct Equivalent: SMBJ33CA-13-F (Diodes Incorporated) is the direct equivalent with identical electrical specifications and the same manufacturer. This part is currently active and widely available.

Alternative Selections Based on Availability and Compliance:

For applications requiring RoHS3 compliance and active product status, the following parts are suitable:

SMBJ33CA-E3/52 (Vishay) — Largest inventory (217,481 pcs), TransZorb® series, RoHS3 compliant
SMBJ33CA-E3/5B (Vishay) — TransZorb® series, RoHS3 compliant
SMBJ33CA-Q (Bourns) — AEC-Q101 qualified, automotive grade, RoHS3 compliant
SMBJ33CAE3/TR13 (Microchip) — Extended temperature range (-65°C to 150°C), RoHS3 compliant

For applications with extended upper operating temperature requirements:

SMBJ33CA-TP (Micro Commercial Co) — Operating range -55°C to 175°C

For applications requiring extended lower temperature operation:

1SMB33CA TR13 PBFREE (Central Semiconductor) — Operating range -65°C to 150°C
SMBJ33CAE3/TR13 (Microchip) — Operating range -65°C to 150°C

Acceptable Tolerance Variant: SMBJ33CD-M3/H (Vishay) — Clamping voltage 52.5V (within tolerance), peak current 11.5A (within tolerance). This part is suitable where minor parameter variations are acceptable.

All substitute parts maintain the DO-214AA (SMB) surface mount package and are directly compatible with existing PCB layouts.

Frequently Asked Questions (FAQ)

Q: Can SMBJ33CA-13-F be used as a direct replacement for SMBJ33CA-13? A: Yes. SMBJ33CA-13-F is manufactured by Diodes Incorporated with identical electrical specifications (33V standoff, 53.3V clamping, 11.3A peak current, 600W peak power) and the same DO-214AA SMB package. The primary difference is packaging format (Cut Tape & Digi-Reel® vs. standard) and active product status.

Q: What is the difference between SMBJ33CA-E3/52 and SMBJ33CA-E3/5B? A: Both are Vishay TransZorb® series parts with identical electrical specifications and operating temperature range (-55°C to 150°C). The difference is in packaging and distribution channel designation. Both are suitable direct substitutes.

Q: Is SMBJ33CD-M3/H compatible with SMBJ33CA-13? A: SMBJ33CD-M3/H is compatible with minor parameter variations. The clamping voltage is 52.5V (vs. 53.3V) and peak current is 11.5A (vs. 11.3A). These variations fall within acceptable tolerance ranges for TVS diode applications. Verify application requirements before selection.

Q: Why is SMBJ33CA-Q qualified as automotive grade? A: SMBJ33CA-Q carries AEC-Q101 qualification and automotive grade designation, indicating it meets automotive industry reliability and quality standards. This part is suitable for automotive and mission-critical applications requiring higher qualification levels.

Q: What is the significance of RoHS3 compliance? A: RoHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements. Most active substitute parts listed are RoHS3 compliant. The original SMBJ33CA-13 is RoHS non-compliant. Verify compliance requirements for your application.

Q: Can I use parts with different operating temperature ranges? A: Yes, if your application operates within the temperature range of the substitute part. SMBJ33CA-TP supports -55°C to 175°C (extended upper range). SMBJ33CAE3/TR13 and 1SMB33CA TR13 PBFREE support -65°C to 150°C (extended lower range). Verify your application's thermal requirements.

Q: Are all substitute parts in the same SMB package? A: Yes. All substitute parts use DO-214AA (SMB) surface mount package. They are physically and electrically compatible with existing PCB layouts designed for SMBJ33CA-13.

Q: Which substitute part has the highest inventory availability? A: SMBJ33CA-E3/52 (Vishay) has the largest inventory at 217,481 pieces. SMBJ33CA-Q (Bourns) has 34,633 pieces. SMBJ33CA-13-F (Diodes) has 35,300 pieces.

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