SMBJ75CAHE3/52 Equivalent & Substitute Parts

Part Overview

The SMBJ75CAHE3/52 is a bidirectional Zener transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the DO-214AA (SMB) package and is designed for transient overvoltage protection applications. The part is currently discontinued at DiGi Electronics, making equivalent substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	SMBJ75CAHE3/52
Manufacturer	Vishay General Semiconductor - Diodes Division
Category	Transient Voltage Suppressors (TVS)
Type	Zener
Bidirectional Channels	1
Voltage - Reverse Standoff (Typ)	75V
Voltage - Breakdown (Min)	83.3V
Voltage - Clamping (Max) @ Ipp	121V
Current - Peak Pulse (10/1000µs)	5A
Power - Peak Pulse	600W
Operating Temperature Range	-55°C ~ 150°C (TJ)
Package / Case	DO-214AA, SMB
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Grade	Automotive
Qualification	AEC-Q101

Substitute Part Grouping Explanation

Substitution eligibility for the SMBJ75CAHE3/52 is determined by the following critical parameters:

Primary Substitution Criteria:

Voltage - Reverse Standoff (Typ): 75V
Voltage - Breakdown (Min): 83.3V
Voltage - Clamping (Max) @ Ipp: 121V
Current - Peak Pulse (10/1000µs): 5A (minimum 5A acceptable)
Power - Peak Pulse: 600W
Package / Case: DO-214AA, SMB
Bidirectional Channels: 1
Mounting Type: Surface Mount

Substitute Categories:

Category 1: Direct Electrical & Mechanical Equivalents (Vishay TransZorb® Series) Parts SMBJ75CA-E3/52, SMBJ75CA-E3/5B, SMBJ75CA-M3/52, and SMBJ75CA-M3/5B maintain identical electrical specifications and package configuration. These differ only in packaging format (Tape & Reel variants) and manufacturing date codes. All are active products with higher inventory availability than the discontinued main part.

Category 2: Cross-Manufacturer Equivalents (Littelfuse SMBJ-HR Series) Parts SMBJ75CA-HR and SMBJ75CA-HRA from Littelfuse maintain identical electrical parameters and package specifications. These components extend the operating temperature range to -65°C (versus -55°C for Vishay), providing enhanced low-temperature performance while maintaining all other electrical characteristics.

Category 3: Manufacturer-Recommended Alternative (MDD) Part SMBJ75CA from MDD provides electrical equivalence with a peak pulse current of 5.3A (exceeds minimum 5A requirement) and identical clamping voltage. Operating temperature range is -50°C ~ 150°C. This part carries the highest inventory level (45,300 pcs).

Category 4: Lower Voltage Alternative (STMicroelectronics) Part SMBJ70CA-TR represents a voltage-reduced alternative with 70V reverse standoff (versus 75V) and 113V clamping voltage (versus 121V). This part is suitable only for applications where the lower voltage rating is acceptable and provides a 5.5A peak pulse current capability.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Breakdown (Min)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Operating Temperature	Package	Product Status
SMBJ75CAHE3/52	Vishay	75V	83.3V	121V	5A	600W	-55°C ~ 150°C	DO-214AA	Discontinued
SMBJ75CA-E3/52	Vishay	75V	83.3V	121V	5A	600W	-55°C ~ 150°C	DO-214AA	Active
SMBJ75CA-E3/5B	Vishay	75V	83.3V	121V	5A	600W	-55°C ~ 150°C	DO-214AA	Active
SMBJ75CA-M3/52	Vishay	75V	83.3V	121V	5A	600W	-55°C ~ 150°C	DO-214AA	Active
SMBJ75CA-M3/5B	Vishay	75V	83.3V	121V	5A	600W	-55°C ~ 150°C	DO-214AA	Active
SMBJ75CA-HR	Littelfuse	75V	83.3V	121V	5A	600W	-65°C ~ 150°C	DO-214AA	Active
SMBJ75CA-HRA	Littelfuse	75V	83.3V	121V	5A	600W	-65°C ~ 150°C	DO-214AA	Active
SMBJ75CA	MDD	75V	83.3V	121V	5.3A	600W	-50°C ~ 150°C	DO-214AA	Active
SMBJ70CA-TR	STMicroelectronics	70V	77.8V	113V	5.5A	600W	-55°C ~ 150°C	DO-214AA	Active

Engineering Selection Recommendations

Primary Selection (Direct Equivalents): SMBJ75CA-E3/52, SMBJ75CA-E3/5B, SMBJ75CA-M3/52, and SMBJ75CA-M3/5B from Vishay are direct electrical and mechanical equivalents. These parts maintain identical specifications to the discontinued SMBJ75CAHE3/52 and are manufactured by the original supplier. Selection among these variants depends on packaging format and availability requirements. All are ROHS3 compliant and carry AEC-Q101 automotive qualification.

Extended Temperature Alternative: SMBJ75CA-HR and SMBJ75CA-HRA from Littelfuse provide identical electrical performance with extended low-temperature operation to -65°C. These parts are suitable for applications requiring enhanced cold-temperature performance while maintaining all other electrical characteristics and DO-214AA package compatibility.

High-Inventory Alternative: SMBJ75CA from MDD offers the highest inventory availability (45,300 pcs) with equivalent electrical specifications and a peak pulse current of 5.3A, which exceeds the minimum 5A requirement. Operating temperature range is -50°C ~ 150°C. This part is suitable for applications where the slightly reduced low-temperature limit is acceptable.

Lower Voltage Alternative: SMBJ70CA-TR from STMicroelectronics is suitable only for applications where a 70V reverse standoff voltage is acceptable. This part provides 5.5A peak pulse current and 113V clamping voltage. Use this part only when circuit design permits the reduced voltage rating.

Frequently Asked Questions (FAQ)

Q: Can SMBJ75CA-E3/52 be used as a direct replacement for SMBJ75CAHE3/52? A: Yes. SMBJ75CA-E3/52 is a direct electrical and mechanical equivalent with identical voltage ratings (75V reverse standoff, 121V clamping), current rating (5A peak pulse), and DO-214AA package. The primary difference is product status (active versus discontinued) and packaging format (Tape & Reel).

Q: What is the difference between SMBJ75CA-E3/52 and SMBJ75CA-M3/52? A: Both parts are manufactured by Vishay and maintain identical electrical specifications and package configuration. The difference lies in manufacturing date codes and internal quality control batches. Both are active products suitable for direct substitution.

Q: Why would I select Littelfuse SMBJ75CA-HR over Vishay SMBJ75CA-E3/52? A: SMBJ75CA-HR extends the operating temperature range to -65°C (versus -55°C for Vishay). Select this part if your application requires enhanced low-temperature performance. All other electrical parameters and package specifications remain identical.

Q: Is SMBJ70CA-TR a suitable substitute? A: SMBJ70CA-TR is suitable only if your circuit design permits a 70V reverse standoff voltage (versus 75V for the original part) and 113V clamping voltage (versus 121V). This part provides higher peak pulse current (5.5A) but lower voltage protection. Verify circuit requirements before selection.

Q: What is the difference between MDD SMBJ75CA and Vishay SMBJ75CA-E3/52? A: Both maintain identical 75V reverse standoff and 121V clamping specifications. MDD SMBJ75CA provides 5.3A peak pulse current (versus 5A minimum) and operates from -50°C ~ 150°C (versus -55°C ~ 150°C for Vishay). MDD offers significantly higher inventory availability.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating, matching the original SMBJ75CAHE3/52 specifications.

Q: Can I mix different manufacturers in the same design? A: Yes. All substitute parts maintain identical electrical specifications and DO-214AA package configuration, allowing cross-manufacturer substitution within the same PCB assembly. Verify with your quality and procurement procedures for any manufacturer qualification requirements.

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