My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMCJ48HE3/9AT
- Part No.:
- SMCJ48HE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ48HE3/9AT.pdf
- Description:
- TVS DIODE 48VWM 85.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,132
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMCJ48HE3/9AT from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-214AB (SMCJ) package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 48 V standoff voltage (VWM), 53.3–58.9 V breakdown range (VBR), 77.4 V clamping voltage (VC) at 19.4 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive power electronics, industrial motor drives, and telecom interface protection.
For engineers reviewing the SMCJ48HE3/9AT datasheet, SMCJ48HE3/9AT pinout, SMCJ48HE3/9AT application, or SMCJ48HE3/9AT equivalent, this device delivers AEC-Q101 qualification, low incremental surge resistance, glass-passivated junction, and RoHS-compliant matte tin-plated leads - critical for high-reliability 12 V/24 V/48 V system design requiring stable clamping under repetitive transients.
Technical Context
The SMCJ48HE3/9AT operates as a unidirectional avalanche diode, leveraging a silicon planar junction structure to clamp transient overvoltages above its reverse standoff threshold. Its response time is sub-nanosecond, with clamping initiated within 1.0 ps of voltage exceeding VBR, and it sustains peak pulse currents up to 19.4 A under standardized 10/1000 µs surge conditions.
Thermally, it exhibits RθJA = 75 °C/W (junction-to-ambient, on 8.0 mm × 8.0 mm copper pads) and RθJL = 15 °C/W (junction-to-lead), enabling reliable operation up to TJ = +150 °C. The device is rated for non-repetitive IFSM = 200 A (8.3 ms half-sine) and meets MSL Level 1 per J-STD-020 at 260 °C peak reflow.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - Maximum continuous reverse operating voltage before conduction begins; defines safe DC rail margin for 48 V systems. |
| VBR (min/max) | 53.3 V / 58.9 V at 1.0 mA - Verified breakdown range ensures consistent turn-on across production lots and temperature. |
| VC @ IPPM | 77.4 V at 19.4 A - Clamping voltage limits downstream IC stress during 1500 W transient events. |
| PPPM | 1500 W - Peak pulse power handling capability per 10/1000 µs waveform, supporting ISO 7637-2 Pulse 1/2/5a compliance. |
| IFSM | 200 A - Surge current rating for 8.3 ms half-sine wave, enabling protection against inductive switch-off spikes in relay/motor circuits. |
| TJ max. | +150 °C - Junction temperature limit compatible with under-hood automotive and industrial ambient environments. |
| Leakage @ VWM | 1.0 µA - Ultra-low reverse leakage preserves battery life and minimizes standby power loss in always-on systems. |
Pinout & Package
Package: DO-214AB (SMCJ), surface-mount, low-profile case with molded UL 94 V-0 compound. Cathode indicated by band on one end; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current path terminal | Connected to ground or lower-potential node; completes clamping path when transient exceeds VBR. |
| Cathode (banded end) | Reverse-biased clamping terminal | Connected to protected line (e.g., 48 V rail); conducts avalanche current into anode during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for engine control units and ADAS power supplies. |
| Glass passivated chip junction | Enhances long-term stability and moisture resistance versus epoxy-passivated alternatives, reducing parametric drift in humid environments. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., EFT bursts), improving protection margin for sensitive gate drivers and ADC inputs. |
| MSL Level 1, 260 °C peak reflow | Enables standard lead-free SMT assembly without pre-baking or special handling - reduces manufacturing cost and yield risk. |
| Matte tin-plated leads | Solderable per J-STD-002 and JESD 22-B102; HE3 suffix meets JESD 201 Class 2 whisker test - prevents tin whisker growth in high-vibration applications. |
Applications
| Automotive Power Rail Protection | Industrial Motor Drive Control |
|---|---|
Use Scenario: Protecting 48 V battery management system (BMS) input stages from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 48 V rail and chassis ground to clamp surges >60 V while remaining inert below VWM. Use Value: Limits peak voltage to 77.4 V during 1500 W pulses, preventing damage to buck converter controllers and isolated CAN transceivers. |
Use Scenario: Safeguarding gate driver supply inputs in 3-phase inverter modules exposed to IGBT switching noise and inductive kickback. IC Role / Device Role / Timing Role: Mounted directly at driver IC VDD pins to absorb nanosecond-scale voltage spikes induced by high di/dt. Use Value: Sub-ns response and low VC ensure gate oxide integrity and prevent false turn-on of power devices during PWM transitions. |
| Telecom Interface Protection | Renewable Energy Charge Controller |
Use Scenario: Shielding RS-485 transceiver power pins in outdoor base station equipment subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Placed on VCC line upstream of transceiver, coordinated with series impedance to meet IEC 61000-4-5 Level 3 (2 kV). Use Value: 1500 W PPPM and 77.4 V VC enable single-device compliance without cascaded clamping networks. |
Use Scenario: Overvoltage suppression on PV string input of MPPT charge controller facing rapid irradiance changes and grid fault coupling. IC Role / Device Role / Timing Role: Connected across input capacitor terminals to clamp transients from open-circuit voltage overshoot and arc faults. Use Value: 200 A IFSM rating supports sustained energy absorption during multi-cycle solar array arcing events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ48A-E3/52T | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher VC (77.4 V same but at only 5.2 A), no AEC-Q101 qualification. | Not suitable for automotive or high-energy industrial transients; limited to low-power signal lines or secondary-side protection. | Select only if space-constrained and surge energy ≤400 W; verify thermal derating on small pads. |
| SMCJ48AHE3/9AT | Identical electrical specs and AEC-Q101 qualification; differs only in marking code (no "E" in part number per Vishay ordering guide - SMCJ48AHE3/9AT is functionally identical to SMCJ48HE3/9AT). | No functional difference; both meet same DO-214AB mechanical and performance requirements. | Direct form-fit-function replacement; interchange permitted per Vishay documentation and Digi-Key/Mouser cross-reference data. |
Compared with SMAJ48A-E3/52T, SMCJ48HE3/9AT delivers 3.75× higher surge power handling and automotive qualification; versus SMCJ48AHE3/9AT, it is a documented alternate marking for the same die and assembly - making it the preferred choice for high-energy 48 V system protection where reliability and legacy BOM alignment matter.
Availability
SMCJ48HE3/9AT is available at Aetrix Electronics and suitable for automotive power distribution, industrial motor drive protection, and renewable energy charge controller designs requiring stable component supply, AEC-Q101 traceability, and 1500 W transient immunity.
Supply support for SMCJ48HE3/9AT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The SMCJ series was engineered specifically for high-energy transient suppression in harsh environments - emphasizing low clamping ratio, AEC-Q101 validation, and robust thermal performance in surface-mount packages.
FAQ
What is the clamping voltage of the SMCJ48HE3/9AT and how is it measured?
The SMCJ48HE3/9AT has a maximum clamping voltage (VC) of 77.4 V, measured at its peak pulse current (IPPM) of 19.4 A using a standardized 10/1000 µs double-exponential waveform. This value is guaranteed across temperature and production lot, ensuring predictable overvoltage limiting for protected circuits. The SMCJ48HE3/9AT achieves this clamping performance while maintaining low incremental resistance, critical for minimizing voltage overshoot during fast transients.
Is the SMCJ48HE3/9AT suitable for automotive applications?
Yes, the SMCJ48HE3/9AT is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood environments up to +150 °C junction temperature. Its construction - glass-passivated junction, matte tin-plated leads meeting JESD 201 Class 2 whisker test, and MSL Level 1 reflow compatibility - satisfies key automotive reliability requirements. The SMCJ48HE3/9AT is commonly deployed in 48 V mild-hybrid systems, body control modules, and ADAS power supplies.
How does the SMCJ48HE3/9AT differ from bi-directional variants like SMCJ48CA?
The SMCJ48HE3/9AT is unidirectional and conducts only in reverse bias above VBR, with polarity marked by a cathode band; SMCJ48CA is bi-directional and symmetrical, lacking polarity marking and conducting in both directions. The SMCJ48HE3/9AT offers lower leakage (<1.0 µA at 48 V) and is preferred for DC rail protection, whereas SMCJ48CA suits AC-coupled or floating signal lines. Both share identical VWM, VBR, and PPPM, but their circuit integration differs fundamentally.
What is the thermal resistance of the SMCJ48HE3/9AT and how does it affect layout?
The SMCJ48HE3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal, and RθJL = 15 °C/W junction-to-lead. To maintain TJ ≤ 150 °C under full 1500 W pulse loading, PCB layout must provide adequate copper area and thermal vias - undersized pads will cause excessive junction heating and premature failure. The SMCJ48HE3/9AT's thermal profile mandates adherence to Vishay's recommended pad dimensions for reliable operation.
Does the SMCJ48HE3/9AT comply with RoHS and halogen-free standards?
Yes, the SMCJ48HE3/9AT carries the HE3 suffix, indicating RoHS compliance per Directive 2011/65/EU and halogen-free status per JEDEC JS709A. The molding compound meets UL 94 V-0 flammability rating, and the matte tin-plated leads satisfy J-STD-002 solderability and JESD 22-B102 mechanical integrity requirements. These certifications are documented in Vishay's material category policy and apply to the SMCJ48HE3/9AT without exception.
SMCJ48HE3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 48V
- Voltage - Breakdown (Min):
- 53.3V
- Voltage - Clamping (Max) @ Ipp:
- 85.5V
- Current - Peak Pulse (10/1000µs):
- 17.5A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMCJ48HE3/9AT FAQ
1.How can I place an order for SMCJ48HE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ48HE3/9AT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SMCJ48HE3/9AT reliable?
The price and inventory of SMCJ48HE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ48HE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ48HE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ48HE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ48HE3/9AT?
SMCJ48HE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ48HE3/9AT order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SMCJ48HE3/9AT?
For technical support, including SMCJ48HE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ48HE3/9AT requirements.
6.How does Aetrix verify that SMCJ48HE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ48HE3/9AT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SMCJ48HE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ48HE3/9AT?
All SMCJ48HE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ48HE3/9AT, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SMCJ48HE3/9AT part is unused and in its original packaging.
Return procedure for SMCJ48HE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ48HE3/9AT Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
