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SMCJ16 Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts
Part Overview
The SMCJ16 is a unidirectional Zener-type transient voltage suppressor manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. This component features a 16V reverse standoff voltage with a 27.3V maximum clamping voltage at peak pulse current of 57.7A, housed in a DO-214AB (SMC) package. The SMCJ16 is classified as obsolete; equivalent active alternatives are available from multiple manufacturers with compatible electrical and mechanical specifications, enabling direct substitution in new designs and production restocking.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - Reverse Standoff (Typ) | 16 | V |
| Voltage - Breakdown (Min) | 16.88 | V |
| Voltage - Clamping (Max) @ Ipp | 27.3 | V |
| Current - Peak Pulse (10/1000µs) | 57.7 | A |
| Power - Peak Pulse | 1500 | W |
| Operating Temperature Range | -55 to 150 | °C |
| Mounting Type | Surface Mount | — |
| Package / Case | DO-214AB, SMC | — |
| Type | Zener | — |
| Unidirectional Channels | 1 | — |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitution of the SMCJ16 is determined by strict alignment of the following electrical and mechanical parameters:
Primary Substitution Criteria:
- Voltage - Reverse Standoff: 16V (exact match required)
- Voltage - Clamping (Max) @ Ipp: 26V to 27.3V (acceptable range)
- Current - Peak Pulse (10/1000µs): 57.7A minimum
- Power - Peak Pulse: 1500W minimum
- Package / Case: DO-214AB or DO-214AC (SMC or SMA equivalent)
- Mounting Type: Surface Mount
- Type: Zener, Unidirectional (1 channel)
- RoHS Status: ROHS3 Compliant
- Moisture Sensitivity Level: 1 (Unlimited)
Substitute Categories:
Category A - Direct Electrical & Package Match (DO-214AB, 1500W): Parts meeting all primary criteria with identical power rating and package footprint. These include SMCJ16A-13-F (Diodes Incorporated), SMCJ16A-TP (Micro Commercial Co), SMCJ16AE3/TR13 (Microchip Technology), and SZ1SMC16AT3G (Littelfuse Inc.).
Category B - Alternative Package with Equivalent Performance (DO-214AC/SMA, 600W): SMCJ16A (EVVO Semi) operates at reduced peak pulse power (600W) but maintains electrical specifications within acceptable tolerance. Package footprint differs (SMA vs. SMC) and requires PCB layout verification.
Category C - Higher Peak Pulse Current (DO-214AB, 3000W): SMLJ16A (Bourns Inc.) and SMLJ16A-TP (Micro Commercial Co) provide doubled peak pulse current (115.4A) and tripled power dissipation (3000W), suitable for applications requiring enhanced transient protection margin.
Category D - Marginal Clamping Voltage Variance: SMCJ16E3/TR13 (Microchip Technology) exhibits 28.8V clamping voltage with reduced peak pulse current (52.1A), representing a trade-off in protection characteristics.
Parameter Comparison
| Manufacturer Part Number | Manufacturer | Voltage - Reverse Standoff (V) | Voltage - Clamping (Max) @ Ipp (V) | Current - Peak Pulse (A) | Power - Peak Pulse (W) | Package / Case | Operating Temperature (°C) | Product Status |
|---|---|---|---|---|---|---|---|---|
| SMCJ16 | Littelfuse Inc. | 16 | 27.3 | 57.7 | 1500 | DO-214AB, SMC | -55 to 150 | Obsolete |
| SMCJ16A | EVVO Semi | 16 | 26 | 57.7 | 600 | DO-214AC, SMA | -65 to 150 | Active |
| SZ1SMC16AT3G | Littelfuse Inc. | 16 | 26 | 57.7 | 1500 | DO-214AB, SMC | -65 to 150 | Active |
| SMCJ16A-13-F | Diodes Incorporated | 16 | 26 | 57.7 | 1500 | DO-214AB, SMC | -55 to 150 | Active |
| SMCJ16A-TP | Micro Commercial Co | 16 | 26 | 57.7 | 1500 | DO-214AB, SMC | -55 to 175 | Active |
| SMCJ16AE3/TR13 | Microchip Technology | 16 | 26 | 57.7 | 1500 | DO-214AB, SMC | -65 to 150 | Active |
| SMCJ16E3/TR13 | Microchip Technology | 16 | 28.8 | 52.1 | 1500 | DO-214AB, SMC | -65 to 150 | Active |
| SMLJ16A | Bourns Inc. | 16 | 26 | 115.4 | 3000 | DO-214AB, SMC | -55 to 150 | Active |
| SMLJ16A-TP | Micro Commercial Co | 16 | 26 | 115.4 | 3000 | DO-214AB, SMC | -55 to 175 | Active |
Engineering Selection Recommendations
Primary Recommendation - Direct Replacement: SMCJ16A-13-F (Diodes Incorporated), SMCJ16A-TP (Micro Commercial Co), or SMCJ16AE3/TR13 (Microchip Technology) are preferred substitutes. All three maintain identical electrical specifications (16V standoff, 26V clamping, 57.7A peak pulse, 1500W power), preserve DO-214AB package compatibility, and carry active product status with ROHS3 compliance. These parts enable drop-in replacement without circuit redesign.
Alternative - Littelfuse Active Equivalent: SZ1SMC16AT3G (Littelfuse Inc.) provides continuity with the original manufacturer while offering active product status. This part includes AEC-Q101 automotive qualification, suitable for applications requiring automotive-grade reliability. Extended operating temperature range (-65°C to 150°C) provides additional thermal margin.
Higher Performance Option: SMLJ16A (Bourns Inc.) or SMLJ16A-TP (Micro Commercial Co) deliver doubled peak pulse current (115.4A) and tripled power dissipation (3000W) within the same DO-214AB footprint. Selection is appropriate for circuits experiencing severe transient stress or requiring enhanced protection margin. Verify thermal management capability before substitution.
Package Variant - Reduced Power Rating: SMCJ16A (EVVO Semi) operates at 600W peak pulse power with DO-214AC (SMA) package. This variant is suitable only for applications with lower transient energy requirements and where PCB layout accommodates SMA footprint. Not recommended as direct replacement for 1500W-rated designs.
Marginal Specification Variant: SMCJ16E3/TR13 (Microchip Technology) exhibits 28.8V clamping voltage with reduced peak pulse current (52.1A). This part introduces specification variance and is not recommended for direct substitution unless circuit design explicitly tolerates higher clamping voltage and lower peak current handling.
Frequently Asked Questions (FAQ)
Q: Can SMCJ16A (EVVO Semi, 600W) directly replace SMCJ16 (1500W)? A: No. While electrical specifications align, the 600W power rating is insufficient for circuits designed around 1500W transient energy dissipation. Thermal stress and component failure risk increase significantly. Use only in applications verified to operate below 600W peak pulse power.
Q: What is the difference between DO-214AB (SMC) and DO-214AC (SMA) packages? A: DO-214AB and DO-214AC are distinct surface-mount packages with different footprints and land patterns. DO-214AB (SMC) is larger and accommodates higher power dissipation. DO-214AC (SMA) is smaller. PCB layout must match the selected package; cross-substitution requires board redesign.
Q: Is SMLJ16A a suitable replacement for SMCJ16? A: SMLJ16A is electrically compatible but provides enhanced performance (115.4A peak pulse, 3000W power vs. 57.7A and 1500W). It occupies the same DO-214AB footprint and is a valid upgrade for applications requiring higher transient protection. Verify thermal design supports increased power dissipation.
Q: Does SZ1SMC16AT3G offer advantages over SMCJ16A-13-F? A: SZ1SMC16AT3G includes AEC-Q101 automotive qualification and extended temperature range (-65°C to 150°C vs. -55°C to 150°C). Selection depends on application requirements. Automotive-grade qualification is mandatory for automotive circuits; general-purpose applications may use either part.
Q: Why is SMCJ16E3/TR13 listed if clamping voltage differs (28.8V vs. 27.3V)? A: SMCJ16E3/TR13 maintains the 16V standoff voltage and 57.7A peak pulse current but exhibits higher clamping voltage (28.8V) and reduced peak pulse current (52.1A). This represents a specification trade-off. Substitution is valid only if circuit design tolerates 28.8V maximum clamping and 52.1A peak pulse current.
Q: What does ROHS3 compliance mean for component selection? A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead, cadmium, mercury, and other hazardous materials. All listed substitutes carry ROHS3 compliance, ensuring regulatory alignment for EU and equivalent markets.
Q: Can I use SMCJ16A-TP with extended temperature range (-55°C to 175°C) in place of SMCJ16? A: Yes. SMCJ16A-TP maintains all electrical specifications and offers extended upper temperature limit (175°C vs. 150°C). This provides additional thermal margin and is a valid upgrade. No circuit modification is required.
Q: What is the significance of Moisture Sensitivity Level (MSL) 1? A: MSL 1 indicates unlimited shelf life without moisture absorption concerns. All listed substitutes carry MSL 1, eliminating moisture-related handling restrictions and enabling standard storage and assembly processes.
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