SMCJ33A-AT-TR13 - 1500W 33V TVS Diode | YAGEO | DO-214AB
Référence : SMCJ33A-AT-TR13 ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $0.34 | $0,34 |
| 10 | $0.27 | $2,70 |
| 100 | $0.19 | $19,00 |
| 500 | $0.15 | $75,00 |
| 1 000 | $0.12 | $120,00 |
| 3 000 | $0.09 | $270,00 |
SMCJ33A-AT-TR13 Présentation
A TVS diode (transient voltage suppressor) is a discrete semiconductor designed to clamp voltage spikes and divert surge energy away from sensitive downstream circuitry. TVS diodes sit in the broader protection taxonomy alongside MOVs (metal-oxide varistors), Zener diodes used for clamping, and gas-discharge tubes; the TVS is differentiated by its sub-nanosecond response time and precise clamping voltage. The SMCJ series occupies the high-energy tier of TVS products, between smaller SMA-packaged parts (400W) and larger SMD packages such as SMCJ/SMDJ (1500W/3000W), serving as a key building block in the surge-protection hierarchy of power-management and circuit-protection subsystems.
Key features include 1500W peak pulse power dissipation at a 10/1000µs waveform, glass-passivated die construction for stable breakdown characteristics, and a low leakage current of typically 1µA at the working voltage. The diode offers unidirectional clamping polarity (A suffix), excellent clamping capability, fast response time (typically <1 ns), and RoHS-compliant, halogen-free termination finish. The -AT variant adds automotive-grade reliability screening per AEC-Q101, making it suitable for under-the-hood and chassis electronics.
Technically, the SMCJ33A-AT uses a silicon avalanche-junction structure that conducts in reverse breakdown when the applied voltage exceeds the breakdown threshold. At the 53.3V clamping voltage, the device can sink up to 28.2A for a brief pulse without failing, diverting energy that would otherwise damage downstream ICs. The peak pulse power is rated for a 10/1000µs exponential waveform per IEC 61000-4-2 and similar surge standards. Steady-state power dissipation is limited to 5W on a standard FR-4 PCB with adequate copper.
Typical applications include 24V automotive load-dump protection (ISO 7637-2), CAN/LIN bus transceiver protection, industrial PLC I/O surge protection, USB and HDMI port ESD suppression on automotive infotainment, and protection of DC-DC converter input rails from inductive load transients. The wide 33V standoff is also useful in 24V industrial bus systems and battery-management protection circuits.
When designing with this device, observe the derating of peak pulse power with pulse duration and temperature - the 1500W rating is at 25°C and a 10/1000µs waveform; shorter pulses and lower temperatures give higher ratings. Place the TVS as close as possible to the connector or entry point where transients enter the PCB, with wide, short traces to minimize parasitic inductance. The junction temperature should not exceed 150°C under any operating condition, including during surge events.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes for the SMCJ33A-AT-TR13 that complement the manufacturer datasheet.
Alternatives de remplacement direct pour SMCJ33A-AT-TR13 — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec SMCJ33A-AT-TR13 (même facteur de forme et même empreinte) — différant par Halogen-Free, Response Time.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
SMCJ33A/TR13
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
SMCJ33CA-AT-TR13
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
SMCJ33A
✅ Remplacement direct✓ En stock
$0.22 / unité
Voir la fiche technique →SMCJ33A-13-F
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
SMCJ33A-E3/57T
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
SMCJ33A/TR13
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
SMCJ33A-AT-TR13 Valeurs maximales et caractéristiques électriques
| Peak Pulse Power (PPP) | 1500 W (10/1000 µs) |
| Working Standoff Voltage (VWM) | 33 V |
| Breakdown Voltage (VBR) min | 36.7 V |
| Clamping Voltage (VC) max | 53.3 V |
| Peak Pulse Current (IPP) | 28.2 A |
| Polarity | Unidirectional |
| Boîtier | DO-214AB (SMC) |
| Type de montage | Surface Mount |
| Automotive Qualification | AEC-Q101 (AT suffix) |
| Température de fonctionnement | -55 °C to +150 °C (TJ) |
| Response Time | < 1 ns (typical) |
| RoHS | Compliant |
| Sans halogène | Yes |
| Packaging | Tape & Reel, 13-inch (TR13) |
Configuration des broches de SMCJ33A-AT-TR13
| Broche 1 | Anode — Anode terminal (unidirectional TVS) |
| Broche 2 | Cathode — Cathode terminal (marked with band on package body) |
Applications typiques
SMCJ33A-AT-TR13 convient pour 6 applications: Automotive 24V Load-Dump Protection, CAN/LIN Bus Transceiver Protection, Industrial PLC 24V I/O Surge Protection, DC-DC Converter Input Protection, USB and HDMI Port ESD Protection (Automotive Infotainment), Battery Management System (BMS) Protection.
Automotive 24V Load-Dump Protection
The SMCJ33A-AT-TR13 protects 24V automotive ECUs from load-dump transients (ISO 7637-2 test pulse) generated when the alternator load is suddenly disconnected while the battery is connected. With a 33V working standoff that comfortably exceeds the 24V nominal battery voltage and a 53.3V clamping ceiling that is below the 60V rating of typical 24V-tolerant ICs, the AT-qualified part is well-suited to chassis and powertrain electronics. Its 1500W peak pulse rating absorbs the worst-case load-dump energy of a 24V system, while the DO-214AB SMC package handles the high peak current (28.2A IPP) without thermal runaway. Place the TVS directly across the battery rail at the PCB entry point with wide, short traces to minimize parasitic inductance that would otherwise let transients overshoot the clamp voltage.
Recommandé
CAN/LIN Bus Transceiver Protection
The SMCJ33A-AT-TR13 clamps ESD and transient surges on automotive CAN and LIN bus lines, which are directly exposed to cable transients and battery shorts. Its 33V VWM is above the 12V/24V bus common-mode voltage, and its 53.3V clamping prevents bus transceiver breakdown during jump-start and reverse-battery events. The AEC-Q101 -AT qualification satisfies automotive EMC requirements (IEC 61000-4-2, ISO 7637), while the sub-nanosecond response time ensures the bus is protected even against the fastest ESD events. The 28.2A IPP capability sinks the energy of typical automotive transient pulses without degradation. Place one TVS on each bus line near the connector, with the cathode tied to the bus pin and the anode to ground.
Recommandé
Industrial PLC 24V I/O Surge Protection
The SMCJ33A-AT-TR13 protects industrial PLC digital inputs and outputs from inductive load transients, motor back-EMF, and switching surges on 24V field wiring. With a 33V standoff above the 24V nominal and a 53.3V clamp below the typical 36V absolute-maximum of 24V I/O driver ICs, it provides robust surge suppression for IEC 61131-2 compliant I/O modules. The 1500W peak pulse rating handles the worst-case inductive kick from solenoids and motor starters, while the wide -55°C to +150°C operating range covers outdoor and factory environments. Place the TVS adjacent to each field-terminal connector, with a short ground return to the chassis ground plane for maximum transient suppression.
Recommandé
DC-DC Converter Input Protection
The SMCJ33A-AT-TR13 protects the input rail of non-isolated 24V-to-5V/12V DC-DC converters in industrial and automotive systems from sustained overvoltage and inductive transients. Its 33V standoff sits above the 24V nominal with margin for normal regulation ripple, and the 53.3V clamp prevents the input voltage from exceeding the 40V-60V absolute-maximum of most 24V-tolerant buck converters. The 28.2A peak pulse current can absorb the inrush energy of a downstream short circuit or hot-plug event, while the AT automotive qualification is overkill but accepted for industrial designs requiring the highest reliability. Place the TVS directly across the input capacitor at the converter input pins.
Recommandé
USB and HDMI Port ESD Protection (Automotive Infotainment)
The SMCJ33A-AT-TR13 supplements dedicated ESD protection arrays on automotive infotainment USB and HDMI ports, where the AT automotive grade is required by OEMs. Its 33V standoff exceeds the 5V data-line common-mode voltage by a wide margin, and the 53.3V clamp at 28.2A IPP absorbs the energy of indirect ESD strikes and cable discharge events that propagate through the harness. The sub-nanosecond response time clamps faster than typical USB-C and HDMI ESD protector ICs, providing a secondary defense layer. The DO-214AB SMC package fits easily behind the board-to-board connector that links the head unit to the display module.
Recommandé
Battery Management System (BMS) Protection
The SMCJ33A-AT-TR13 protects battery management ICs and cell-monitoring front-ends in 24V battery stacks (e.g., e-scooter, light EV, and industrial backup batteries) from load-dump and inductive transients. Its 33V working standoff covers 24V Li-ion pack nominal voltages with margin, and the 53.3V clamping ceiling protects the 40V-rated BMS AFE inputs from overvoltage. The 1500W peak pulse power sinks the energy of a sudden battery disconnect under load, and the AT suffix satisfies the AEC-Q101 reliability requirements of light-electric-vehicle applications. Place the TVS directly across the pack input at the BMS connector with a low-impedance ground return to the pack negative terminal.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour SMCJ33A-AT-TR13 — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | SMCJ33A/TR13 | SMCJ33CA-AT-TR13 | SMCJ33A | SMCJ33A-13-F | SMCJ33A-E3/57T |
|---|---|---|---|---|---|---|
| Brand | YAGEO | YAGEO | YAGEO | Littelfuse | Diodes Incorporated | Vishay |
| Package | DO-214AB (SMC) | DO-214AB (SMC) - same | DO-214AB (SMC) - same | DO-214AB (SMC) - same | DO-214AB (SMC) - same | DO-214AB (SMC) - same |
| Working Standoff Voltage (VWM) | 33 V | 33 V | 33 V | 33 V | 33 V | 33 V |
| Clamping Voltage (VC) max | 53.3 V | 53.3 V | 53.3 V | 53.3 V | 53.3 V | 53.3 V |
| Peak Pulse Current (IPP) | 28.2 A | 28.2 A | 28.2 A | 28.2 A | 28.2 A | 28.2 A |
| Peak Pulse Power (PPP) | 1500 W | 1500 W | 1500 W | 1500 W | 1500 W | 1500 W |
| Polarity | Unidirectional | Unidirectional | Bidirectional | Unidirectional | Unidirectional | Unidirectional |
| Automotive Qualification | AEC-Q101 (AT) | No (commercial) | AEC-Q101 (AT) | No (commercial) | No (commercial) | No (commercial) |
Principaux différenciateurs
- AEC-Q101 automotive-qualified at no extra cost vs commercial grade (vs SMCJ33A/TR13 (commercial))
- Cross-brand pin compatibility with major TVS suppliers (vs SMCJ33A (Littelfuse), SMCJ33A-13-F (Diodes Inc.), SMCJ33A-E3/57T (Vishay))
- Bidirectional drop-in variant available for AC-coupled lines (vs SMCJ33CA-AT-TR13 (bidirectional))
Notes de conception
Place the SMCJ33A-AT-TR13 as close as possible to the connector or entry point where transients enter the PCB. Keep PCB traces to the TVS short and wide (minimum 0.5mm width per ampere of surge current) to minimize parasitic inductance. Estimated: trace inductance of ~10 nH per cm adds approximately 2.8V of overshoot during a 28.2A IPP event (V = L * dI/dt), which can push the effective clamp voltage above 56V - too high for many 24V-rated ICs.
The 1500W peak pulse power rating is specified at 25°C and a 10/1000µs exponential waveform; derate for higher temperatures and shorter pulses per the YAGEO SMCJ-AT datasheet derating curve. Estimated: at 125°C ambient, the peak pulse power capability drops to approximately 60-70% of the 25°C rating. Steady-state power dissipation must be kept below 5W on a standard FR-4 PCB with 1 square inch of copper, or the junction temperature will exceed 150°C under continuous surge conditions.
Do not use the SMCJ33A-AT-TR13 to clamp signals above its VWM continuously - it is not a regulator. Ensure the maximum continuous DC operating voltage never exceeds 33V, or the device will operate in avalanche and overheat. Do not parallel TVS diodes without ballast resistors - the part with the lower breakdown voltage will take all the current and fail. Verify polarity: the cathode (banded end) must face the positive rail in unidirectional circuits.
Use a solid ground plane directly beneath the TVS to provide a low-impedance return path for surge currents. The DO-214AB (SMC) land pattern should use equal-size anode and cathode pads (per the YAGEO SMCJ-AT datasheet recommended footprint) with no thermal relief spokes on the cathode pad. Add a 0.1µF ceramic bypass capacitor in parallel with the TVS for high-frequency noise suppression; this combination provides both surge clamping and EMI filtering at the connector entry.
Informations de conformité
RoHS compliant per YAGEO product page. AEC-Q101 (not AEC-Q100) automotive-qualified via -AT suffix; AEC-Q100 is the IC standard, AEC-Q101 is the discrete semiconductor equivalent. Halogen-free per YAGEO SMCJ-AT datasheet declaration.