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SMBJ170CE3/TR13 Equivalent & Substitute Parts
Part Overview
The SMBJ170CE3/TR13 is a transient voltage suppressor (TVS) diode manufactured by Microchip Technology, classified as a bidirectional Zener-type TVS diode in the Surface Mount DO-214AA (SMB) package. This component provides transient overvoltage protection with a reverse standoff voltage of 170V and maximum clamping voltage of 304V at peak pulse current. The part is Active status and widely used in general-purpose transient protection applications requiring surface mount implementation.
Equivalent and substitute parts are identified for design flexibility, inventory optimization, and manufacturing continuity. Substitute parts must maintain electrical parameter compatibility within the specified tolerance ranges for safe interchangeability in circuit designs.
Substiute Parts
Key Parameters
| Parameter | Specification |
|---|---|
| Reverse Standoff Voltage (Typ) | 170V |
| Breakdown Voltage (Min) | 189V |
| Clamping Voltage (Max) @ Ipp | 304V (Main Part) / 275V (Substitutes) |
| Peak Pulse Current (10/1000µs) | 2A - 2.2A |
| Peak Pulse Power | 600W |
| Bidirectional Channels | 1 |
| Type | Zener |
| Package / Case | DO-214AA, SMB |
| Mounting Type | Surface Mount |
| Operating Temperature Range | -65°C ~ 150°C (Main) / -55°C ~ 150°C (Some Substitutes) |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution eligibility for the SMBJ170CE3/TR13 is determined by the following critical electrical and mechanical parameters:
Mandatory Compatibility Criteria:
- Reverse Standoff Voltage: 170V (fixed across all alternatives)
- Breakdown Voltage (Min): 189V (fixed across all alternatives)
- Peak Pulse Power: 600W (fixed across all alternatives)
- Bidirectional Channels: 1 channel (fixed across all alternatives)
- Package / Case: DO-214AA (SMB) surface mount package
- Type: Zener bidirectional TVS diode
- RoHS Status: ROHS3 Compliant
- Moisture Sensitivity Level: 1 (Unlimited)
Parameters with Allowable Variation:
- Clamping Voltage (Max) @ Ipp: 275V - 304V range acceptable
- Peak Pulse Current (10/1000µs): 2A - 2.2A range acceptable
- Operating Temperature: -55°C to -65°C minimum, 150°C maximum
All identified substitute parts (SMBJ170CA variants from Meritek, Diodes Incorporated, Littelfuse Inc., and STMicroelectronics) meet or exceed the mandatory compatibility criteria, with clamping voltages of 275V and peak pulse currents of 2.18A - 2.2A remaining within acceptable engineering margins for circuit protection applications.
Parameter Comparison
| Parameter | SMBJ170CE3/TR13 (Microchip) | SMBJ170CA (Meritek) | SMBJ170CA-13-F (Diodes Inc.) | SMBJ170CA-HR (Littelfuse) | SMBJ170CA-TR (STMicroelectronics) |
|---|---|---|---|---|---|
| Reverse Standoff Voltage (Typ) | 170V | 170V | 170V | 170V | 170V |
| Breakdown Voltage (Min) | 189V | 189V | 189V | 189V | 189V |
| Clamping Voltage (Max) @ Ipp | 304V | 275V | 275V | 275V | 275V |
| Peak Pulse Current (10/1000µs) | 2A | 2.18A | 2.2A | 2.2A | 2.2A |
| Peak Pulse Power | 600W | 600W | 600W | 600W | 600W |
| Operating Temperature Range | -65°C ~ 150°C | -55°C ~ 150°C | -55°C ~ 150°C | -65°C ~ 150°C | -55°C ~ 150°C |
| Package / Case | DO-214AA, SMB | DO-214AA (SMB) | DO-214AA, SMB | DO-214AA, SMB | DO-214AA, SMB |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
Engineering Selection Recommendations
All substitute parts listed are Active status products from established component manufacturers. Selection among the SMBJ170CA variants should prioritize the following:
Clamping Voltage Consideration: The main part SMBJ170CE3/TR13 specifies a maximum clamping voltage of 304V, while all substitute parts provide 275V clamping voltage. The 29V difference represents a tighter clamping specification in substitute parts, resulting in lower transient voltage peaks at the protected circuit node. This characteristic makes substitute parts equally suitable or superior for overvoltage protection in most general-purpose applications.
Temperature Range: The SMBJ170CA-HR (Littelfuse) and SMBJ170CE3/TR13 (Microchip) both specify -65°C minimum operating temperature. Meritek, Diodes Incorporated, and STMicroelectronics variants specify -55°C minimum. Temperature range selection depends on application environment requirements.
Peak Pulse Current: Substitute parts provide slightly higher current ratings (2.18A - 2.2A) compared to the original 2A specification, offering additional margin in transient protection capacity.
Regulatory Compliance: All parts maintain ROHS3 compliance and Moisture Sensitivity Level 1 (Unlimited), suitable for manufacturing environments without special handling constraints.
Frequently Asked Questions (FAQ)
Q: Can SMBJ170CA parts directly replace SMBJ170CE3/TR13 in existing designs?
A: Yes. All substitute SMBJ170CA variants maintain the critical electrical parameters (170V standoff, 189V breakdown, 600W peak power) and identical package format (DO-214AA SMB). The slightly lower clamping voltage (275V vs 304V) in substitutes results in improved transient suppression with lower voltage peaks at the protected circuit.
Q: What is the difference between 275V and 304V clamping voltage specifications?
A: Clamping voltage defines the maximum voltage across the TVS diode when conducting peak pulse current. The SMBJ170CE3/TR13 specifies 304V maximum, while substitute parts specify 275V maximum. Lower clamping voltage provides faster voltage limiting with reduced voltage overshoot, making substitutes suitable for applications with tighter voltage margin requirements.
Q: Are there packaging differences between the main part and substitutes?
A: The main part is supplied in Tape & Reel (TR) format. Substitute parts are available in similar tape formats: Cut Tape (CT) & Digi-Reel® (STMicroelectronics), Tape & Reel (Diodes Incorporated, Littelfuse), or unspecified packaging (Meritek). All maintain the standard DO-214AA (SMB) physical package for direct PCB mounting compatibility.
Q: Which substitute offers the widest operating temperature range?
A: Both SMBJ170CA-HR (Littelfuse) and the original SMBJ170CE3/TR13 (Microchip) specify -65°C to 150°C operating range. Meritek, Diodes Incorporated, and STMicroelectronics variants specify -55°C to 150°C. Selection depends on application minimum temperature requirements.
Q: Is higher peak pulse current in substitutes beneficial?
A: Substitute parts provide peak pulse currents of 2.18A - 2.2A versus 2A in the original. Higher pulse current rating indicates improved transient energy handling capacity without exceeding maximum thermal stress, providing additional design margin in applications with variable transient severity.
Q: What compliance certifications apply to all parts in this comparison?
A: All parts maintain ROHS3 compliance, REACH Unaffected status, and Moisture Sensitivity Level 1 (Unlimited MSL). These certifications confirm environmental compliance and eliminate special storage or handling requirements for manufacturing processes.
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