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SMBJ70A-M3/52 Equivalent & Substitute Parts
Part Overview
The SMBJ70A-M3/52 is a unidirectional transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the 70V reverse standoff category and is designed for general-purpose transient protection applications. The part is active in production status with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Equivalent and substitute parts are identified based on matching electrical performance parameters and package compatibility within the DO-214AA (SMB) form factor.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - Reverse Standoff (Typ) | 70 | V |
| Voltage - Breakdown (Min) | 77.8 | V |
| Voltage - Clamping (Max) @ Ipp | 113 | V |
| Current - Peak Pulse (10/1000µs) | 5.3 | 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 SMBJ70A-M3/52 is determined by the following criteria:
Primary Substitution Parameters:
- Voltage - Reverse Standoff (Typ): 70V
- Voltage - Clamping (Max) @ Ipp: 113V (±tolerance)
- Current - Peak Pulse (10/1000µs): 5.3A (±tolerance)
- Power - Peak Pulse: 600W
- Package / Case: DO-214AA or SMB
- Mounting Type: Surface Mount
- Type: Zener (Unidirectional)
Secondary Substitution Parameters:
- Operating Temperature Range: -55°C minimum to 150°C minimum
- RoHS Status: ROHS3 Compliant
- Moisture Sensitivity Level: MSL 1
Parts are grouped into three categories:
- Direct Equivalents - Identical electrical specifications and package, different manufacturer or tape/reel variant
- Manufacturer Recommended Alternatives - Identical electrical specifications, alternative packaging or sourcing designation
- Functional Alternatives - Similar voltage class with minor parameter variations within acceptable operating margins
Parameter Comparison
| Part Number | Manufacturer | Voltage - Reverse Standoff (V) | Voltage - Clamping (V) | Current - Peak Pulse (A) | Operating Temp (°C) | Package | RoHS Status |
|---|---|---|---|---|---|---|---|
| SMBJ70A-M3/52 | Vishay | 70 | 113 | 5.3 | -55 to 150 | DO-214AA (SMB) | ROHS3 |
| SMBJ70D-M3/H | Vishay | 70 | 111 | 5.4 | -55 to 150 | DO-214AA (SMB) | ROHS3 |
| SMBJ70A-E3/52 | Vishay | 70 | 113 | 5.3 | -55 to 150 | DO-214AA (SMB) | ROHS3 |
| 1SMB70A TR13 PBFREE | Central Semiconductor | 70 | 113 | 5.3 | -65 to 150 | DO-214AA (SMB) | ROHS3 |
| SMBJ70A | MDD | 70 | 113 | 5.3 | -50 to 150 | DO-214AA (SMB) | ROHS3 |
| SMBJ70A-13-F | Diodes Incorporated | 70 | 113 | 5.3 | -55 to 150 | DO-214AA (SMB) | ROHS3 |
| SMBJ70A-TP | Micro Commercial Co | 70 | 113 | 5.3 | -55 to 175 | DO-214AA (SMB) | ROHS3 |
| SMBJ64A | Meritek | 64 | 103 | 5.83 | -55 to 150 | DO-214AA (SMB) | ROHS3 |
| SMBJ75A | Meritek | 75 | 121 | 4.96 | -55 to 150 | DO-214AA (SMB) | ROHS3 |
Engineering Selection Recommendations
Direct Equivalents (Preferred for Drop-In Replacement):
SMBJ70A-E3/52 (Vishay) and SMBJ70A-13-F (Diodes Incorporated) are direct electrical equivalents with identical voltage and current specifications. Both maintain ROHS3 compliance and MSL 1 rating. SMBJ70A-E3/52 offers higher inventory availability (45,100 units) compared to the original part (867 units).
Functionally Compatible Alternatives:
SMBJ70D-M3/H (Vishay) operates at the same 70V reverse standoff with marginally lower clamping voltage (111V vs 113V) and slightly higher peak pulse current (5.4A vs 5.3A). This part is functionally compatible within the same voltage class and maintains identical temperature and compliance ratings.
1SMB70A TR13 PBFREE (Central Semiconductor) provides identical electrical performance with extended lower temperature rating (-65°C vs -55°C), suitable for applications requiring enhanced cold-temperature performance.
SMBJ70A-TP (Micro Commercial Co) matches all electrical parameters with extended upper temperature rating (-55 to 175°C vs -55 to 150°C), applicable for high-temperature environments.
SMBJ70A (MDD) provides identical electrical specifications with slightly reduced lower temperature limit (-50°C vs -55°C).
Voltage Class Alternatives (Limited Substitution):
SMBJ64A (Meritek) operates at 64V reverse standoff with 103V clamping voltage. This part is suitable only for applications where the lower voltage rating is acceptable and does not compromise circuit protection requirements.
SMBJ75A (Meritek) operates at 75V reverse standoff with 121V clamping voltage. This part is suitable only for applications where the higher voltage rating provides adequate margin and does not exceed component voltage ratings in the protected circuit.
All substitute parts maintain ROHS3 compliance, MSL 1 rating, and active production status.
Frequently Asked Questions (FAQ)
Q: Can SMBJ70A-E3/52 be used as a direct replacement for SMBJ70A-M3/52?
A: Yes. Both parts are manufactured by Vishay with identical electrical specifications: 70V reverse standoff, 113V clamping voltage, and 5.3A peak pulse current. The difference is in the tape/reel variant designation (E3/52 vs M3/52), which does not affect electrical performance or package compatibility.
Q: What is the difference between SMBJ70D-M3/H and SMBJ70A-M3/52?
A: Both parts operate at 70V reverse standoff and are housed in DO-214AA (SMB) packages. SMBJ70D-M3/H has a clamping voltage of 111V and peak pulse current of 5.4A, compared to 113V and 5.3A for SMBJ70A-M3/52. These differences fall within the same voltage protection class and are functionally compatible.
Q: Can SMBJ64A or SMBJ75A be used instead of SMBJ70A-M3/52?
A: SMBJ64A and SMBJ75A operate in different voltage classes (64V and 75V respectively) and should only be substituted if the application circuit design explicitly allows for these alternative voltage ratings. They are not direct equivalents and require circuit-level validation.
Q: Are all substitute parts ROHS3 compliant?
A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL 1 (unlimited) moisture sensitivity rating, matching the original SMBJ70A-M3/52 specifications.
Q: What is the difference between tape/reel packaging variants (M3/52, E3/52, TR13)?
A: Tape/reel variants (M3/52, E3/52, TR13) refer to different reel configurations and packaging specifications for automated assembly. They do not affect electrical performance or component functionality. Selection depends on assembly equipment compatibility and procurement requirements.
Q: Does operating temperature range affect substitution eligibility?
A: Operating temperature range is a secondary consideration. Parts with extended temperature ratings (such as 1SMB70A TR13 PBFREE at -65 to 150°C or SMBJ70A-TP at -55 to 175°C) are compatible with the original -55 to 150°C specification and provide additional margin for extreme temperature environments. Parts with reduced temperature ranges (such as SMBJ70A at -50 to 150°C) are compatible only if the application does not require the full -55°C lower limit.
Q: Which substitute part has the highest inventory availability?
A: SMBJ70A-E3/52 (Vishay) has the highest inventory with 45,100 units in stock, compared to 867 units for the original SMBJ70A-M3/52.
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