SM50T82AY STMicroelectronics TVS Diode (Uni-directional) (Diodes Moulded) In Stock
STMicroelectronics SM50T82AY is an automotive-grade 5000 W unidirectional TVS diode with 82 V nominal breakdown voltage and 113 V maximum clamping voltage in an SMC package. Compliant with ISO 7637-2 and MIL-STD-750 standards for transient surge protection in harsh automotive environments. Globally stocked through authorized distributors with fast worldwide shipping.
- Manufacturer
- STMicroelectronics
- Package
- Diodes Moulded
- Pin Count
- 2
- Lifecycle
- ACTIVE
- Datasheet
- SM50T82AY Datasheet PDF
- Category
- TVS Diode (Uni-directional)
- Price
- From $0.8100(MOQ 10)
- Temp Range
- -55.0°C to 175.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of SM50T82AY?
- 5000 W peak pulse power rating with 82 V nominal breakdown provides robust transient protection for 70 V automotive load-dump events
- ISO 7637-2 and MIL-STD-750 compliance qualifies the SM50T82AY for automotive ECU and industrial equipment transient protection applications
- SMC (DO-214AB) surface mount package enables automated PCB assembly while handling 5000 W surge pulses without board damage
What is SM50T82AY used for?
The SM50T82AY is designed to protect automotive electronic control units (ECUs), alternator rectifier circuits, and 48 V mild-hybrid systems from load-dump transients and reverse polarity events up to 5000 W peak. Its 82 V breakdown voltage clamps surge voltages below the 113 V maximum, safeguarding downstream MOSFETs, microcontrollers, and CAN transceivers in powertrain and body control modules. The device also protects industrial motor drive inputs and DC bus circuits where voltage transients from inductive switching can exceed nominal rail voltages by 2-3×.
What are the specifications of SM50T82AY?
| Factory Lead Time | 21Weeks |
| YTEOL | 8 |
| Additional Feature | ISO 7637-2; MIL-STD-750 |
| Breakdown Voltage-Max | 86.1V |
| Breakdown Voltage-Min | 77.9V |
| Breakdown Voltage-Nom | 82V |
| Clamping Voltage-Max | 113V |
| Configuration | SINGLE, 1 CHANNEL |
| Diode Element Material | SILICON |
| Diode Type | TRANS VOLTAGE SUPPRESSOR DIODE |
| JEDEC-95 Code | DO-214AB |
| JESD-30 Code | R-PDSO-C2 |
| Non-rep Peak Rev Power Dis-Max | 5000W |
| Number of Elements | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Polarity | UNIDIRECTIONAL |
| Reference Standard | AEC-Q101; IEC-61000-4-2, 4-4; ISO 10605; ISO 16750 |
| Rep Pk Reverse Voltage-Max | 70V |
| Reverse Current-Max | 0.2 µ A |
| Reverse Test Voltage | 70V |
| Surface Mount | YES |
| Technology | AVALANCHE |
| Terminal Form | C BEND |
| Terminal Position | DUAL |
| Package | Diodes Moulded |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8541.10.00.50 |
| Country of Origin | Mainland China |
Where can I find the SM50T82AY datasheet?
SM50T82AY Datasheet DownloadOfficial datasheet from STMicroelectronics
What are equivalent replacements for SM50T82AY?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What peak pulse power and breakdown voltage does the SM50T82AY provide for automotive load-dump protection?
The SM50T82AY is rated for 5000 W peak pulse power with a nominal breakdown voltage of 82 V (minimum 77.9 V, maximum 86.1 V) and a clamping voltage of 113 V maximum. These ratings are specifically matched to ISO 7637-2 pulse profiles for 24 V and 48 V automotive systems where load-dump transients can reach 70 V to 100 V on the bus.
How does the SM50T82AY's ISO 7637-2 compliance benefit automotive ECU designers?
ISO 7637-2 compliance means the SM50T82AY has been characterized and validated against standardized automotive transient waveforms including load-dump (Pulse 5), ignition switch spikes (Pulse 1, 2a, 2b), and mutual coupling surges. Using a compliant TVS diode reduces the design and test burden for ECU manufacturers by ensuring the protection component meets OEM transient immunity requirements without additional characterization, shortening automotive qualification timelines.
When is the SM50T82AY a better choice than a 3000 W TVS diode for protecting 48 V mild-hybrid automotive circuits?
In 48 V mild-hybrid systems, load-dump transients from alternator disconnection can reach energy levels exceeding 3000 W transient ratings, causing TVS diodes with lower power ratings to enter thermal runaway or fail short. The SM50T82AY's 5000 W rating provides 67% more headroom at the same 82 V clamping threshold, preventing avalanche overload during the 200 ms to 400 ms duration load-dump pulses defined in ISO 7637-2, which is critical for protecting BSG (belt-starter-generator) inverter gate drivers.
Related Guides
CSD87313DMS Synchronous Buck Power Stage Design Guide
Design a compact CSD87313DMS synchronous buck stage with practical guidance for loss, gate drive, PCB layout, EMI, thermal validation, and sourcing.
Aug 6, 2026
STEF05SGR eFuse Selection Guide for 5 V Overcurrent Protection
Choose STEF05SGR for 5 V overcurrent protection by checking current-limit margin, inrush, thermal loss, fault response, and sourcing.
Aug 6, 2026
C0402C103K3RACTU Selection Guide: Choosing a 10 nF 0402 MLCC
Select C0402C103K3RACTU by voltage margin, X7R behavior, tolerance, 0402 assembly risk, and qualified alternatives.
Aug 4, 2026
STM32H753VIT6 MCU Selection Guide: Memory, Package, Connectivity, and Security
Choose STM32H753VIT6 by evaluating memory architecture, LQFP-100 pin fit, connectivity, security, power, and sourcing tradeoffs.
Aug 4, 2026
Why Buy from FindMyChip
About STMicroelectronics
STMicroelectronics is a global semiconductor leader serving customers across the spectrum of electronics applications. ST's products are found in a wide range of applications including automotive, industrial, personal electronics, and communications.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 10+ | $1.1300 | $11.30 |
| 100+ | $0.9400 | $94.00 |
| 250+ | $0.9397 | $234.93 |
| 500+ | $0.9000 | $450.00 |
| 1000+ | $0.8984 | $898.42 |
| 2500+ | $0.8100 | $2025.00 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“Their engineering team helped us find a pin-compatible alternative when our original MCU went EOL.”
You May Also Like
SMAJ10A
Bourns
TVS Diode (Uni-directional)
SMDJ60A
LITTELFUSE
TVS Diode (Uni-directional)
RCLAMP0504PATCT
SEMTECH
TVS Diode (Uni-directional)
SP1003-01DTG
LITTELFUSE
TVS Diode (Uni-directional)
SMAJ5.0A
LITTELFUSE
TVS Diode (Uni-directional)
SMAJ36A
LITTELFUSE
TVS Diode (Uni-directional)
SMBJ40A-E3/52
Vishay
TVS Diode (Uni-directional)
SMAJ120A
LITTELFUSE
TVS Diode (Uni-directional)
SMF12A
LITTELFUSE
TVS Diode (Uni-directional)
SP1001-02JTG
LITTELFUSE
TVS Diode (Uni-directional)
TPSMF4L70A
LITTELFUSE
TVS Diode (Uni-directional)
MSP5.0A-M3/89A
Vishay
TVS Diode (Uni-directional)
MSP3V3-M3/89A
Vishay
TVS Diode (Uni-directional)
SP3030-01ETG
LITTELFUSE
TVS Diode (Uni-directional)
SMCJ26A
LITTELFUSE
TVS Diode (Uni-directional)
SMAJ45A
LITTELFUSE
TVS Diode (Uni-directional)
SMCJ20A-E3/57T
Vishay
TVS Diode (Uni-directional)
PTVS12VZ1USKNYL
Nexperia
TVS Diode (Uni-directional)
RCLAMP0521PATCT
SEMTECH
TVS Diode (Uni-directional)
NNCD5.1D-A
Renesas Electronics
TVS Diode (Uni-directional)
824540261
Würth Elektronik
TVS Diode (Uni-directional)
824520581
Würth Elektronik
TVS Diode (Uni-directional)
824520541
Würth Elektronik
TVS Diode (Uni-directional)
824520121
Würth Elektronik
TVS Diode (Uni-directional)