1.5SMC8.2A-E3/9AT - 1500W 8.2V Uni-Dir TVS | Vishay
MPN: 1.5SMC8.2A-E3/9AT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.42 | $0.42 |
| 10 | $0.38 | $3.80 |
| 100 | $0.31 | $31.00 |
| 500 | $0.26 | $130.00 |
| 1,000 | $0.22 | $220.00 |
| 3,000 | $0.18 | $540.00 |
1.5SMC8.2A-E3/9AT Overview
A TVS diode (Transient Voltage Suppressor) is a clamping semiconductor that operates in avalanche breakdown when the voltage across it exceeds a defined threshold. It belongs to the protective-component hierarchy: TVS diode → ESD/surge protector → discrete semiconductor → circuit protection device. Under normal operation the part presents a high-impedance path; when a transient pushes the line above its breakdown voltage (8.2V nominal / 7.02V reverse standoff), it conducts in nanoseconds and shunts the surge energy to ground, holding the protected rail to a safe clamping voltage.
Key specifications include a 1500W peak pulse power dissipation on a 10/1000 µs waveform, 124A peak pulse current (Ipp), 12.1V maximum clamping voltage at Ipp, and a glass-passivated chip junction that improves long-term reliability under repetitive surge events. The TRANSZORB series uses a low-profile DO-214AB package suitable for automated placement and offers uni-directional (suffix A) polarity.
Architecturally, the device is a silicon avalanche junction that has been glass-passivivated for environmental stability and given a low-inductance, large-area die bond to handle the 1500W transient. The flip-chip-style construction minimizes lead inductance so the clamping response remains sub-nanosecond, preserving the protected IC's input stage during fast-edge ESD events.
Typical applications include 12V automotive load-dump protection, industrial 24V bus transient suppression, USB Type-C VBUS line protection, and telecom port protection against secondary lightning surges. Any low-voltage DC rail driving sensitive CMOS logic, microcontrollers, or RF transceivers in harsh EMI environments can leverage this part.
When designing with this device, observe the derating curve over temperature - peak pulse power falls linearly from 1500W at 25°C toward zero at the maximum TJ. Place the TVS as close as possible to the connector entry point and keep the trace to ground short and wide to minimize parasitic inductance that would otherwise let voltage overshoot above the 12.1V clamp rating.
This page synthesizes distributor pricing, parametric drop-in alternatives sourced from cross-reference tools, and applied design guidance beyond what is published in the manufacturer's datasheet alone.
Drop-in alternatives for 1.5SMC8.2A-E3/9AT — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
1.5SMC8.2A-M3/9AT
✅ Drop-In📋 Reference alternative (not in catalog)
1.5SMC8.2AHE3/9AT
✅ Drop-In📋 Reference alternative (not in catalog)
1.5SMC8.2A-E3/57T
✅ Drop-In📋 Reference alternative (not in catalog)
TPSMC8.2AHE3/9AT
✅ Drop-In📋 Reference alternative (not in catalog)
1.5SMC8.2A-E
✅ Drop-In📋 Reference alternative (not in catalog)
SMCJ8.0A
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1.5SMC8.2A-E3/9AT Specifications
| Peak Pulse Power (10/1000 µs) | 1500 W |
| Reverse Standoff Voltage (Vrwm) | 7.02 V |
| Breakdown Voltage (Vbr) min | 7.79 V |
| Breakdown Voltage (Vbr) max | 8.61 V |
| Clamping Voltage (Vc) at Ipp | 12.1 V |
| Peak Pulse Current (Ipp) | 124 A |
| Polarity | Unidirectional |
| Package / Case | DO-214AB (SMCJ) |
| Mounting Type | Surface Mount |
| Packaging | Tape & Reel (TR) |
| Configuration | Single |
| Number of Pins | 2 |
| ESD Protection | Yes (TVS / surge suppressor) |
| RoHS Status | Compliant |
| Series | 1.5SMC (TRANSZORB) |
1.5SMC8.2A-E3/9AT Pin Configuration
| Pin 1 | Anode — Anode terminal of uni-directional TVS diode (forward bias current flows IN) |
| Pin 2 | Cathode — Cathode terminal; reverse-bias working terminal and avalanche-clamp current path |
Typical Applications
1.5SMC8.2A-E3/9AT is suitable for 6 applications: 12V Automotive Load-Dump Protection, USB Type-C VBUS Transient Suppression, Industrial 24V PLC I/O Protection, Telecom Secondary Lightning Protection, DC Motor Brush-Commutation Transient Clamp, IoT Sensor Node Power-Rail Protection.
12V Automotive Load-Dump Protection
The 1.5SMC8.2A-E3/9AT protects downstream 5V-tolerant ICs from 12V automotive bus transients including inductive kickback and load-dump events. Its 7.02V reverse standoff sits above the 5V rail while its 12.1V clamping voltage keeps protected circuitry within absolute maximum ratings when the Ipp reaches 124A. Place it directly across the regulator output to ground; the 1500W peak pulse power handles the 10/1000 µs load-dump waveform specified in ISO 7637-2. Compared to higher-voltage TVS parts (24V, 33V), the 8.2V rating clamps tighter, preserving more headroom for downstream analog circuitry. Pair it with a series PTC or fuse to limit sustained fault current.
Recommended
USB Type-C VBUS Transient Suppression
The 1.5SMC8.2A-E3/9AT clamps ESD and cable-discharge transients on the USB Type-C VBUS line before they reach the downstream PMIC or charging controller. Its uni-directional polarity, 124A peak pulse current, and 1.0 psec response time make it ideal for hot-plug events where a charged cable can inject hundreds of volts into the connector. The DO-214AB footprint fits comfortably behind the USB Type-C receptacle on the PCB. Choose the -M3 lead-free finish for RoHS-compliant consumer electronics and pair with a PTC resettable fuse on VBUS for sustained overcurrent protection.
Recommended
Industrial 24V PLC I/O Protection
For 24V PLC discrete I/O modules and sensor interfaces, the 1.5SMC8.2A-E3/9AT clamps field-side transients from switching solenoids, motor starters, and relay coils. Although the rail is 24V nominal and exceeds the 7.02V Vrwm, the part serves as a secondary clamp on the 5V or 12V sub-rail that powers the logic-side opto-isolators and digital inputs. Its 1500W rating comfortably absorbs the IEC 61000-4-2 ESD and IEC 61000-4-5 surge events that factory equipment must survive. Use it in parallel with a higher-voltage TVS (e.g., 1.5SMC33A) on the 24V line for two-stage protection.
Recommended
Telecom Secondary Lightning Protection
Inside telecom equipment (DSLAM, ONT, base-station remote radio head), the 1.5SMC8.2A-E3/9AT serves as secondary-side protection behind the primary GDT or sidactor. After the primary device limits the bulk of the lightning-induced surge, this TVS clamps residual transients on internal DC rails to within 12.1V. Its sub-nanosecond response complements slower primary protectors and prevents back-porch voltage from damaging downstream PHY ICs. The DO-214AB package handles the let-through energy from ITU-T K.20/K.21 surge tests.
Recommended
DC Motor Brush-Commutation Transient Clamp
In brushed DC motor drives, the 1.5SMC8.2A-E3/9AT absorbs the inductive flyback voltage generated when the PWM switches off the motor current. Place it directly across the motor terminals or across the FET drain-source to clamp the spike before it exceeds the FET's VDS(max). With 7.02V Vrwm and 1500W peak power, the part comfortably handles repetitive commutation events at PWM frequencies up to 25 kHz. Its uni-directional polarity matches the typical low-side switch topology used in H-bridge drivers.
Recommended
IoT Sensor Node Power-Rail Protection
Battery-powered IoT sensor nodes often operate from a 3.6V LiSOCl2 or Li-ion cell whose charging port or boost-converter output is exposed to ESD events when the user handles the device. The 1.5SMC8.2A-E3/9AT clamps these transients to 12.1V, protecting the low-voltage MCU and sensor ICs that operate below 5V. Its 1500W rating is overkill for steady-state but exactly what's needed for the rare but destructive ESD strike (IEC 61000-4-2 level 4: 8 kV contact, 15 kV air). The DO-214AB footprint is small enough for space-constrained wearable designs.
Recommended
Recommended Products Summary
Engineering reference data for 1.5SMC8.2A-E3/9AT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | 1.5SMC8.2A-M3/9AT | 1.5SMC8.2AHE3/9AT | 1.5SMC8.2A-E3/57T | TPSMC8.2AHE3/9AT | 1.5SMC8.2A-E | SMCJ8.0A |
|---|---|---|---|---|---|---|---|
| Package | DO-214AB (SMCJ) | DO-214AB (SMCJ) - same | DO-214AB (SMCJ) - same | DO-214AB (SMCJ) - same | DO-214AB (SMCJ) - same | DO-214AB (SMCJ) - same | DO-214AB (SMCJ) - same |
| Brand | Vishay Intertechnology | Vishay Intertechnology | Vishay Intertechnology | Vishay Intertechnology | Vishay Intertechnology | Littelfuse | Littelfuse |
| Reverse Standoff Voltage (Vrwm) | 7.02 V | 7.02 V | 7.02 V | 7.02 V | 7.02 V | 7.02 V | 8.0 V |
| Peak Pulse Power (10/1000 µs) | 1500 W | 1500 W | 1500 W | 1500 W | 1500 W | 1500 W | 1500 W |
| Polarity | Unidirectional | Unidirectional | Unidirectional | Unidirectional | Unidirectional | Unidirectional | Unidirectional |
| Automotive Qualification | No (-E3 finish) | No (lead-free matte tin) | AEC-Q101 (HE3 finish) | No (reel variant) | AEC-Q101 (TPSMC family) | No | No |
| RoHS Compliance | Yes (with -E3 exemption or -M3) | Yes | Yes | Exemption applies | Yes | Yes | Yes |
Key Differentiators
- Industry-standard 7.02V/12.1V/124A/1500W ratings (vs SMCJ8.0A (Littelfuse))
- Glass-passivated TRANSZORB chip junction (vs 1.5SMC8.2A-E (Littelfuse))
- Full TRANSZORB series breadth on a single datasheet (vs Competitor series datasheets)
Design Notes
Place the TVS as close as possible to the connector entry or transient source. Keep the trace from the protected line to the TVS anode and from the TVS cathode to ground as short and wide as practical - every additional 1 nH of trace inductance adds a voltage spike of L*dI/dt during the surge edge, which can push the protected IC above its absolute maximum even though the TVS itself is in avalanche. A ground pour directly under the DO-214AB pad is the most effective way to minimize this parasitic inductance.
Estimated: at the rated 1500W peak pulse on a 10/1000 µs waveform the silicon junction sees a brief thermal excursion; however, the DO-214AB has limited steady-state dissipation. Average power dissipation must stay below ~5W continuous or the junction will exceed 150°C. For repetitive surges (e.g., motor commutation), compute the time-averaged power P_avg = P_peak * duty_cycle and verify it is below the derated continuous rating at the operating ambient temperature. Heatsinking the cathode pad to a 1oz copper pour of 1 sq inch roughly halves the junction-to-ambient thermal resistance.
Do not select a TVS with reverse standoff voltage (Vrwm) below the maximum continuous operating voltage of the protected rail - this causes the TVS to conduct continuously in avalanche, which destroys it within seconds. Do not confuse uni-directional with bi-directional parts: a bi-directional TVS clamps both polarities but a uni-directional part (like this one) clamps only reverse-polarity transients. Do not parallel two TVS diodes of the same rating to double the surge current - small mismatch in Vbr causes one to hog the current and fail first.
Compliance Information
RoHS compliant per Vishay product family. -E3 suffix uses SnPb finish exempt under RoHS Annex III 7(a); -M3 suffix is fully lead-free. Not AEC-Q100 qualified; choose TPSMC8.2AHE3/9AT or 1.5SMC8.2AHE3/9AT for AEC-Q101 automotive qualification.
