SM4T28AYAlternatives & Equivalent Parts
About SM4T28AY
SM4T28AY is a TVS Diode (Uni-directional) component manufactured by STMicroelectronics. It comes in a Other package. Below you'll find known alternative and equivalent parts that can serve as replacements in your design.
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Specification Comparison
| Parameter | SM4T28AYSource | SMAJ28A | SMAJ22CA | XAL4020-102MEC | SN65HVD232DR |
|---|---|---|---|---|---|
| Manufacturer | STMicroelectronics | LITTELFUSE | LITTELFUSE | COILCRAFT | Texas Instruments |
| Package Type | Other | Diodes Moulded | Diodes Moulded Non Polarised | Other | — |
| Pin Count | 2 | 2 | 2 | 2 | — |
| Temperature Range | -55.0°C ~ 150.0°C | -65.0°C ~ 150.0°C | -65.0°C ~ 150.0°C | -40.0°C ~ 125.0°C | — |
| Price | $0.0980 | $0.0169 | $0.0388 | $0.6100 | $0.3767 |
| Stock | In Stock | In Stock | In Stock | In Stock | In Stock |
| Lifecycle | ACTIVE | ACTIVE | ACTIVE | ACTIVE | — |
| Electrical Parameters | |||||
| Factory Lead Time | 53 Weeks, 1 Day | — | — | — | — |
| YTEOL | 6 | 6.1 | 6.1 | 7.8 | — |
| Breakdown Voltage-Max | 29.5 V | 34.4 V | 26.9 V | — | — |
| Breakdown Voltage-Min | 26.7 V | 31.1 V | 24.4 V | — | — |
| Breakdown Voltage-Nom | 28.1 V | 32.75 V | 25.65 V | — | — |
| Clamping Voltage-Max | 50 V | 45.4 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 | — | — |
| JEDEC-95 Code | DO-214AC | DO-214AC | DO-214AC | — | — |
| JESD-30 Code | R-PDSO-C2 | R-PDSO-C2 | R-PDSO-C2 | — | — |
| JESD-609 Code | e3 | — | — | — | — |
| 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 | RECTANGULAR | — | — |
| Package Style | SMALL OUTLINE | SMALL OUTLINE | SMALL OUTLINE | SMT | — |
| Peak Reflow Temperature (Cel) | 260 | 260 | 260 | — | — |
| Polarity | UNIDIRECTIONAL | UNIDIRECTIONAL | BIDIRECTIONAL | — | — |
| Qualification Status | Not Qualified | Not Qualified | Not Qualified | — | — |
| Reference Standard | AEC-Q101; IEC-61000-4-2; ISO 10605 | IEC-61000-4-2; UL RECOGNIZED | IEC-61000-4-2; UL RECOGNIZED | AEC-Q200 | — |
| Rep Pk Reverse Voltage-Max | 24 V | 28 V | 22 V | — | — |
| Reverse Current-Max | 0.2 µA | 1 µA | 1 µA | — | — |
| Reverse Test Voltage | 24 V | 28 V | 22 V | — | — |
| Surface Mount | YES | YES | YES | YES | — |
| Technology | AVALANCHE | AVALANCHE | AVALANCHE | — | — |
| Terminal Finish | Matte Tin (Sn) | Matte Tin (Sn) | Matte Tin (Sn) | Tin/Silver (Sn/Ag) | — |
| Terminal Form | C BEND | C BEND | C BEND | — | — |
| Terminal Position | DUAL | DUAL | DUAL | — | — |
| ## SM4T28AY Alternates Showing results | Image | — | — | — | — |
| Pbfree Code | — | No | No | Yes | — |
| Forward Voltage-Max (VF) | — | 3.5 V | — | — | — |
| Power Dissipation-Max | — | 3.3 W | 3.3 W | — | — |
| Time@Peak Reflow Temperature-Max (s) | — | 30 | 30 | — | — |
| Case/Size Code | — | — | — | 1616 | — |
| Construction | — | — | — | Rectangular | — |
| Core Material | — | — | — | COMPOSITE | — |
| DC Resistance | — | — | — | 0.0146 Ω | — |
| Inductance-Nom (L) | — | — | — | 1 µH | — |
| Inductor Application | — | — | — | POWER INDUCTOR | — |
| Inductor Type | — | — | — | GENERAL PURPOSE INDUCTOR | — |
| Number of Functions | — | — | — | 1 | — |
| Package Height | — | — | — | 2.1 mm | — |
| Package Length | — | — | — | 4 mm | — |
| Package Width | — | — | — | 4 mm | — |
| Packing Method | — | — | — | TR, Embossed Plastic, 7 Inch | — |
| Rated Current-Max | — | — | — | 9.6 A | — |
| Self Resonance Frequency | — | — | — | 79 MHz | — |
| Shape/Size Description | — | — | — | RECTANGULAR PACKAGE | — |
| Shielded | — | — | — | YES | — |
| Terminal Placement | — | — | — | DUAL ENDED | — |
| Terminal Shape | — | — | — | ONE SURFACE | — |
| Test Frequency | — | — | — | 1 MHz | — |
| Tolerance | — | — | — | 20% | — |
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 SM4T28AY — response within 24 hours.
Quick Links
Why Look for Alternatives?
Finding alternatives for SM4T28AY 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 SM4T28AY 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.
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FAQ
What is equivalent to SM4T28AY?
Known equivalents for SM4T28AY include SMAJ28A, SMAJ22CA, XAL4020-102MEC. Contact FindMyChip for a full compatibility analysis for your specific application.
Can I use a different manufacturer's part instead of SM4T28AY?
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 SM4T28AY 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.