SMBJ170A-M3/52 Equivalent & Substitute Parts

Part Overview

The SMBJ170A-M3/52 is a unidirectional transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the 170V reverse standoff category with a 275V maximum clamping voltage and 2.2A peak pulse current rating. The part is classified as Active status and is RoHS3 compliant. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity for applications requiring 170V TVS diode functionality in DO-214AA (SMB) packaging.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	170	V
Voltage - Breakdown (Min)	189	V
Voltage - Clamping (Max) @ Ipp	275	V
Current - Peak Pulse (10/1000µs)	2.2	A
Power - Peak Pulse	600	W
Operating Temperature Range	-55 to 150	°C (TJ)
Mounting Type	Surface Mount	-
Package / Case	DO-214AA, SMB	-
Type	Zener	-
Unidirectional Channels	1	-
RoHS Status	ROHS3 Compliant	-
Moisture Sensitivity Level (MSL)	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitute parts for the SMBJ170A-M3/52 are qualified based on the following electrical and mechanical parameters:

Critical Matching Parameters:

Voltage - Reverse Standoff (Typ): 170V
Voltage - Clamping (Max) @ Ipp: 275V (±5V tolerance acceptable)
Current - Peak Pulse (10/1000µs): 2.2A (±0.03A tolerance acceptable)
Power - Peak Pulse: 600W
Package / Case: DO-214AA, SMB
Type: Zener, Unidirectional
Mounting Type: Surface Mount
Operating Temperature Range: -55°C to 150°C minimum

Substitution Categories:

Category 1: Direct Electrical & Packaging Equivalents (Vishay TransZorb® Series)

SMBJ170A-E3/5B
SMBJ170A-E3/52

These parts maintain identical electrical specifications and differ only in packaging configuration (Tape & Reel variants). Both are Vishay products within the TransZorb® series.

Category 2: Near-Equivalent with Minor Parameter Variance (Vishay TransZorb® Series)

SMBJ170D-M3/H

This part maintains the 170V reverse standoff and 600W peak pulse power. Clamping voltage is 270V (5V lower than primary part) and peak pulse current is 2.23A (0.03A higher). These variations remain within acceptable engineering tolerances for general purpose TVS applications.

Category 3: Cross-Manufacturer Equivalents (Alternative Suppliers)

1SMB170A TR13 PBFREE (Central Semiconductor Corp)
SMBJ170A (Fairchild Semiconductor)
SMBJ170A-13-F (Diodes Incorporated)

These parts are supplied by alternative manufacturers and maintain identical electrical specifications: 170V reverse standoff, 275V clamping voltage, 2.2A peak pulse current, and 600W peak pulse power. All are packaged in DO-214AA/SMB surface mount configuration and rated for -55°C to 150°C operation (1SMB170A extends to -65°C minimum).

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (V)	Voltage - Breakdown Min (V)	Voltage - Clamping Max @ Ipp (V)	Current - Peak Pulse (A)	Power - Peak Pulse (W)	Operating Temp (°C)	Package	RoHS Status	Inventory (Pcs)
SMBJ170A-M3/52	Vishay	170	189	275	2.2	600	-55 to 150	DO-214AA, SMB	ROHS3	818
SMBJ170A-E3/5B	Vishay	170	189	275	2.2	600	-55 to 150	DO-214AA, SMB	ROHS3	6793
SMBJ170A-E3/52	Vishay	170	189	275	2.2	600	-55 to 150	DO-214AA, SMB	ROHS3	2700
SMBJ170D-M3/H	Vishay	170	192	270	2.23	600	-55 to 150	DO-214AA, SMB	ROHS3	8093
1SMB170A TR13 PBFREE	Central Semiconductor	170	189	275	2.2	600	-65 to 150	DO-214AA, SMB	ROHS3	1488
SMBJ170A	Fairchild Semiconductor	170	189	275	2.2	600	-55 to 150	DO-214AA, SMB	-	17300
SMBJ170A-13-F	Diodes Incorporated	170	189	275	2.2	600	-55 to 150	DO-214AA, SMB	ROHS3	10200

Engineering Selection Recommendations

Primary Substitutes (Recommended for Direct Replacement):

SMBJ170A-E3/5B and SMBJ170A-E3/52 are functionally identical to the SMBJ170A-M3/52 with identical electrical specifications and RoHS3 compliance. Selection between these Vishay variants depends on packaging configuration requirements (Tape & Reel format). SMBJ170A-E3/5B offers higher inventory availability (6793 units).

Secondary Substitutes (Acceptable with Electrical Verification):

SMBJ170D-M3/H maintains the 170V reverse standoff and 600W peak pulse power rating. The 270V clamping voltage (5V reduction) and 2.23A peak pulse current (0.03A increase) represent minor parameter variance within acceptable engineering tolerances for general purpose transient voltage suppression applications. This part is also Vishay TransZorb® series and RoHS3 compliant.

Cross-Manufacturer Alternatives (Verified Equivalents):

SMBJ170A (Fairchild Semiconductor), SMBJ170A-13-F (Diodes Incorporated), and 1SMB170A TR13 PBFREE (Central Semiconductor) provide equivalent electrical performance with identical 170V/275V/2.2A specifications. All maintain RoHS3 compliance (except Fairchild variant where compliance status is not specified). The 1SMB170A TR13 PBFREE extends the minimum operating temperature to -65°C, providing enhanced low-temperature performance. Cross-manufacturer substitution is appropriate when primary Vishay inventory is constrained.

Compliance Considerations:

All recommended substitutes maintain RoHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage protocols. REACH status is unaffected for all qualified substitutes.

Frequently Asked Questions (FAQ)

Q: Can SMBJ170D-M3/H be used as a direct replacement for SMBJ170A-M3/52?

A: SMBJ170D-M3/H is functionally compatible for general purpose TVS applications. The clamping voltage is 270V versus 275V (5V lower), and peak pulse current is 2.23A versus 2.2A (0.03A higher). These parameters remain within acceptable engineering tolerances for transient voltage suppression. Verify application-specific clamping voltage requirements before substitution.

Q: What is the difference between SMBJ170A-E3/5B and SMBJ170A-E3/52?

A: Both parts are electrically identical with matching 170V reverse standoff, 275V clamping voltage, and 2.2A peak pulse current. The designation difference reflects packaging configuration variants within Vishay's Tape & Reel distribution. Selection depends on procurement and assembly line requirements.

Q: Are cross-manufacturer parts (Fairchild, Diodes Inc., Central Semiconductor) fully compatible?

A: Yes. SMBJ170A (Fairchild), SMBJ170A-13-F (Diodes Incorporated), and 1SMB170A TR13 PBFREE (Central Semiconductor) maintain identical electrical specifications: 170V reverse standoff, 275V clamping voltage, 2.2A peak pulse current, and 600W peak pulse power. All are packaged in DO-214AA/SMB surface mount configuration. Cross-manufacturer substitution is appropriate for supply chain flexibility.

Q: Does the 1SMB170A TR13 PBFREE offer any performance advantage?

A: The 1SMB170A TR13 PBFREE extends the minimum operating temperature to -65°C compared to -55°C for other variants. This provides enhanced performance in low-temperature environments. Electrical specifications remain identical to the primary part.

Q: Are all substitute parts RoHS3 compliant?

A: All substitute parts except SMBJ170A (Fairchild Semiconductor) explicitly specify RoHS3 compliance. The Fairchild variant does not provide compliance documentation in the available data. Verify RoHS3 certification status with the supplier if regulatory compliance is required.

Q: What is the inventory status for substitute parts?

A: SMBJ170A (Fairchild) offers the highest inventory at 17,300 units. SMBJ170A-E3/5B (Vishay) provides 6,793 units. SMBJ170A-13-F (Diodes Incorporated) has 10,200 units available. SMBJ170D-M3/H (Vishay) provides 8,093 units. The primary part SMBJ170A-M3/52 has 818 units in stock.

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