SMAJ28AAlternatives & Equivalent Parts
About SMAJ28A
SMAJ28A is a TVS Diode (Uni-directional) component manufactured by LITTELFUSE. It comes in a Diodes Moulded package. Below you'll find known alternative and equivalent parts that can serve as replacements in your design.
Need pricing on these alternatives?
Get one quote covering all 4 alternatives for SMAJ28A — response within 24 hours.
Specification Comparison
| Parameter | SMAJ28ASource | SM4T28AY | 50SVPF18M | SMAJ22CA | ECHU1C103GX5 |
|---|---|---|---|---|---|
| Manufacturer | LITTELFUSE | STMicroelectronics | Panasonic | LITTELFUSE | Panasonic |
| Package Type | Diodes Moulded | Other | Other | Diodes Moulded Non Polarised | Other |
| Pin Count | 2 | 2 | 2 | 2 | 2 |
| Temperature Range | -65.0°C ~ 150.0°C | -55.0°C ~ 150.0°C | -55.0°C ~ 105.0°C | -65.0°C ~ 150.0°C | -55.0°C ~ 125.0°C |
| Price | $0.0169 | $0.0980 | $0.2380 | $0.0388 | $0.0900 |
| Stock | In Stock | In Stock | In Stock | In Stock | In Stock |
| Lifecycle | ACTIVE | ACTIVE | ACTIVE | ACTIVE | ACTIVE |
| Electrical Parameters | |||||
| Pbfree Code | No | — | Yes | No | Yes |
| YTEOL | 6.1 | 6 | 7 | 6.1 | 5.74 |
| Breakdown Voltage-Max | 34.4 V | 29.5 V | — | 26.9 V | — |
| Breakdown Voltage-Min | 31.1 V | 26.7 V | — | 24.4 V | — |
| Breakdown Voltage-Nom | 32.75 V | 28.1 V | — | 25.65 V | — |
| Clamping Voltage-Max | 45.4 V | 50 V | — | 35.5 V | — |
| Configuration | SINGLE, 1 CHANNEL | SINGLE, 1 CHANNEL | — | SINGLE, 1 CHANNEL | — |
| Diode Element Material | SILICON | SILICON | — | SILICON | — |
| Diode Type | TRANS VOLTAGE SUPPRESSOR DIODE | TRANS VOLTAGE SUPPRESSOR DIODE | — | TRANS VOLTAGE SUPPRESSOR DIODE | — |
| Forward Voltage-Max (VF) | 3.5 V | — | — | — | — |
| JEDEC-95 Code | DO-214AC | DO-214AC | — | DO-214AC | — |
| JESD-30 Code | R-PDSO-C2 | R-PDSO-C2 | — | R-PDSO-C2 | — |
| Non-rep Peak Rev Power Dis-Max | 400 W | 400 W | — | 400 W | — |
| Number of Elements | 1 | 1 | — | 1 | — |
| Package Body Material | PLASTIC/EPOXY | PLASTIC/EPOXY | — | PLASTIC/EPOXY | — |
| Package Shape | RECTANGULAR | RECTANGULAR | CYLINDRICAL PACKAGE | RECTANGULAR | RECTANGULAR PACKAGE |
| Package Style | SMALL OUTLINE | SMALL OUTLINE | SMT | SMALL OUTLINE | SMT |
| Peak Reflow Temperature (Cel) | 260 | 260 | — | 260 | — |
| Polarity | UNIDIRECTIONAL | UNIDIRECTIONAL | POLARIZED | BIDIRECTIONAL | — |
| Power Dissipation-Max | 3.3 W | — | — | 3.3 W | — |
| Qualification Status | Not Qualified | Not Qualified | — | Not Qualified | — |
| Reference Standard | IEC-61000-4-2; UL RECOGNIZED | AEC-Q101; IEC-61000-4-2; ISO 10605 | — | IEC-61000-4-2; UL RECOGNIZED | CSA; ENEC; UL |
| Rep Pk Reverse Voltage-Max | 28 V | 24 V | — | 22 V | — |
| Reverse Current-Max | 1 µA | 0.2 µA | — | 1 µA | — |
| Reverse Test Voltage | 28 V | 24 V | — | 22 V | — |
| Surface Mount | YES | YES | YES | YES | YES |
| Technology | AVALANCHE | AVALANCHE | — | AVALANCHE | — |
| Terminal Finish | Matte Tin (Sn) | Matte Tin (Sn) | — | Matte Tin (Sn) | Tin/Silver/Copper (Sn/Ag/Cu) - hot dipped |
| Terminal Form | C BEND | C BEND | — | C BEND | — |
| Terminal Position | DUAL | DUAL | — | DUAL | — |
| Time@Peak Reflow Temperature-Max (s) | 30 | — | — | 30 | — |
| Factory Lead Time | — | 53 Weeks, 1 Day | — | — | 20 Weeks |
| JESD-609 Code | — | e3 | — | — | e1 |
| ## SM4T28AY Alternates Showing results | — | Image | — | — | — |
| Reach Compliance Code | — | — | Compliant | — | Compliant |
| Additional Feature | — | — | ESR IS MEASURED AT 100KHZ TO 300KHZ | — | — |
| Capacitance | — | — | 18 µF | — | 0.01 µF |
| Capacitor Type | — | — | ALUMINUM ELECTROLYTIC CAPACITOR | — | FILM CAPACITOR |
| Dielectric Material | — | — | ALUMINUM (SOLID POLYMER) | — | PLASTIC |
| ESR | — | — | 35 mΩ | — | — |
| Height | — | — | 6.9 mm | — | 1.1 mm |
| Leakage Current | — | — | 0.18 mA | — | — |
| Mounting Feature | — | — | SURFACE MOUNT | — | SURFACE MOUNT |
| Negative Tolerance | — | — | 20% | — | 2% |
| Packing Method | — | — | TR, EMBOSSED, 15 INCH | — | TR, EMBOSSED, 13 INCH |
| Positive Tolerance | — | — | 20% | — | 2% |
| Rated (DC) Voltage (URdc) | — | — | 50 V | — | 16 V |
| Ripple Current | — | — | 135 mA | — | — |
| Size Code | — | — | 3333 | — | 0805 |
| Tan Delta | — | — | 0.12 | — | 0.6 |
| Terminal Shape | — | — | FLAT | — | WRAPAROUND |
Cells highlighted in yellow indicate differing values across parts. Always verify with official datasheets before substitution.
Need pricing on these alternatives?
Get one quote covering all 4 alternatives for SMAJ28A — response within 24 hours.
Quick Links
Why Look for Alternatives?
Finding alternatives for SMAJ28A is essential for supply chain resilience. Component shortages, long lead times, and end-of-life notices can disrupt production schedules. Having verified alternative parts ensures your designs remain manufacturable.
When evaluating SMAJ28A replacements, consider key parameters such as package compatibility, electrical specifications, and operating temperature range. Our engineering team can help verify pin-to-pin compatibility for your specific application.
Can't Find What You Need?
Our sourcing team can help find compatible alternatives for SMAJ28A. Get expert recommendations within 24 hours.
FAQ
What is equivalent to SMAJ28A?
Known equivalents for SMAJ28A include SM4T28AY, 50SVPF18M, SMAJ22CA. Contact FindMyChip for a full compatibility analysis for your specific application.
Can I use a different manufacturer's part instead of SMAJ28A?
In many cases, yes. Cross-manufacturer alternatives exist for most standard components. However, always verify pin compatibility, electrical specs, and package dimensions before substituting in production.
How do I verify SMAJ28A alternatives?
Compare the datasheet specifications including pinout, voltage ratings, timing parameters, and package dimensions. FindMyChip's engineering team can help with compatibility verification — submit an RFQ to get started.