My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMCJ48AHE3/9AT
- Part No.:
- SMCJ48AHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ48AHE3/9AT.pdf
- Description:
- TVS DIODE 48VWM 77.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,098
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMCJ48AHE3/9AT from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 48 V stand-off voltage (VWM), 53.3–58.9 V breakdown voltage (VBR) at 1 mA, 77.4 V maximum clamping voltage (VC) at 19.4 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) rating with 10/1000 µs waveform.
For engineers reviewing the SMCJ48AHE3/9AT datasheet, SMCJ48AHE3/9AT pinout, SMCJ48AHE3/9AT application, or SMCJ48AHE3/9AT equivalent, this device is selected for high-energy surge immunity in automotive power supplies, industrial sensor interfaces, and telecom line protection where AEC-Q101 qualification, low clamping ratio, and MSL Level 1 reliability are required.
Technical Context
The SMCJ48AHE3/9AT operates as a silicon avalanche diode with glass-passivated junction, delivering sub-nanosecond response to transients. Its unidirectional polarity enables cathode-referenced clamping on positive-going surges, and its thermal resistance (RθJA = 75 °C/W) supports operation up to +150 °C junction temperature under defined PCB pad layout.
Designed per ANSI/IEEE C62.35, it meets UL 497B recognition (QVGQ2) and complies with JESD201 Class 2 whisker resistance. The device is rated for non-repetitive 8.3 ms half-sine surge current up to 200 A (IFSM) and exhibits a VBR temperature coefficient of +0.103 %/°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin for 48 V systems. |
| VBR (min/max) | 53.3 V / 58.9 V at 1 mA - Confirmed avalanche onset range; ensures reliable triggering above nominal rail. |
| VC @ IPPM | 77.4 V at 19.4 A - Clamped voltage during 10/1000 µs surge; limits downstream IC stress to ≤77.4 V. |
| PPPM | 1500 W - Peak transient energy handling capacity; supports IEC 61000-4-5 Level 4 (4 kV) compliance with proper layout. |
| ID @ VWM | 1.0 µA - Reverse leakage at stand-off; negligible power loss and noise contribution in standby. |
| TJ max. | +150 °C - Maximum junction temperature; enables use in under-hood automotive and high-ambient industrial environments. |
| Package | SMC (DO-214AB) - Surface-mount outline with 8.0 mm × 8.0 mm copper pads; supports automated placement and IPC-compliant reflow. |
Pinout & Package
SMCJ48AHE3/9AT uses the standard SMC (DO-214AB) package: molded epoxy case with matte tin-plated leads, polarity indicated by a cathode band on the unidirectional device. Mounting requires 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal per Vishay's recommended layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Clamping output node | Connected to protected line; conducts surge current to ground when voltage exceeds VBR. |
| Anode | Reference/ground return | Typically tied to system ground or low-impedance return path; completes clamping loop during transient events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD; suitable for engine control and ADAS power domains. |
| Glass passivated junction | Enhances long-term stability and moisture resistance vs. epoxy-passivated alternatives; critical for field-deployed industrial equipment. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a); improves clamping precision. |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without baking; reduces manufacturing complexity and cost. |
| UL 497B recognized (QVGQ2) | Meets safety requirements for telecom and data line protectors; simplifies end-equipment certification. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 48 V battery-supplied ECUs against load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor to clamp surges before LDO or DC-DC converter. Use Value: Limits voltage to ≤77.4 V during 1500 W pulses, preventing damage to 60 V-rated power management ICs. |
Use Scenario: Shielding analog front-end inputs of pressure/temperature sensors in factory automation PLCs. IC Role / Device Role / Timing Role: Low-leakage (1.0 µA) TVS on signal lines to absorb ESD and switching noise from nearby solenoids. Use Value: Maintains signal integrity with <1 µA bias current and clamps transients within 1 ns, avoiding ADC saturation. |
| Telecom DC Power Input Protection | Motor Drive Control Signal Protection |
|
Use Scenario: Safeguarding -48 V telecom rectifier outputs against lightning-induced surges on central office equipment. IC Role / Device Role / Timing Role: Cathode-to-rail configuration clamps positive transients to ground while blocking normal -48 V bias. Use Value: Withstands repeated 10/1000 µs surges up to 1500 W, meeting Telcordia GR-1089-CORE Level 3 requirements. |
Use Scenario: Guarding isolated gate driver enable lines in BLDC motor inverters against cross-talk and inductive kickback. IC Role / Device Role / Timing Role: Fast-response (sub-ns) TVS placed at microcontroller GPIO output to suppress coupling from high-dV/dt power stages. Use Value: Clamps spikes to 77.4 V before they exceed the 3.3 V logic threshold of optocoupler or digital isolator inputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ48A-E3/61T | Lower PPPM (400 W), SMA package (smaller footprint, higher RθJA = 110 °C/W) | Not suitable for 1500 W surges; limited to lower-energy IEC 61000-4-2 ESD or low-power signal lines. | Select only if space-constrained and surge energy is ≤400 W; verify thermal derating at +85 °C ambient. |
| SMCJ48CAHE3/9AT | Bidirectional variant; identical VWM/VBR/VC but symmetric clamping in both polarities | Required for AC-coupled or floating signal lines (e.g., RS-485, CAN bus) where negative transients occur. | Choose when protecting bidirectional interfaces; note that ID doubles to 2.0 µA for VWM ≤10 V models (not applicable here). |
Compared with SMAJ48A-E3/61T and SMCJ48CAHE3/9AT, the SMCJ48AHE3/9AT uniquely balances 1500 W surge capacity, AEC-Q101 qualification, and unidirectional clamping in SMC package-making it optimal for high-reliability 48 V DC power protection where asymmetric surge directionality is known.
Availability
SMCJ48AHE3/9AT is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor conditioning, and telecom DC input protection requiring stable component supply across multi-year production cycles.
Supply support for SMCJ48AHE3/9AT 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 diodes, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMCJ series was developed for high-energy transient suppression in harsh environments-targeting automotive, industrial, and telecom systems needing certified, high-power TVS solutions in standardized surface-mount packages.
FAQ
What is the clamping voltage of SMCJ48AHE3/9AT at its rated peak pulse current?
The SMCJ48AHE3/9AT has a maximum clamping voltage (VC) of 77.4 V at 19.4 A peak pulse current (IPPM), measured with a 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during a full-rated surge event and is confirmed in Vishay's datasheet Document Number 88394, page 2.
Is SMCJ48AHE3/9AT qualified for automotive applications?
Yes, SMCJ48AHE3/9AT carries AEC-Q101 qualification, verified per the "HE3" suffix designation in Vishay's ordering nomenclature. It undergoes stress testing for temperature cycling, high-temperature reverse bias, and ESD-making it suitable for under-hood and chassis-mounted automotive modules.
What does the "HE3/9AT" suffix indicate in SMCJ48AHE3/9AT?
The "HE3" denotes RoHS-compliant and AEC-Q101 qualified construction, while "9AT" specifies packaging in 13-inch diameter plastic tape and reel, with a base quantity of 3500 units. This matches Vishay's ordering information table on page 3 of document 88394.
How does SMCJ48AHE3/9AT differ from the bidirectional SMCJ48CAHE3/9AT?
SMCJ48AHE3/9AT is unidirectional with cathode marking and clamps only positive transients relative to ground; SMCJ48CAHE3/9AT is bidirectional, clamping surges of either polarity. Both share identical VWM (48 V), VBR (53.3–58.9 V), and VC (77.4 V), but differ in polarity marking and application scope.
What PCB layout guidance applies to SMCJ48AHE3/9AT for optimal thermal and surge performance?
Vishay specifies mounting on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal to achieve rated PPPM and thermal dissipation. Use short, wide traces to minimize inductance, avoid vias in current paths, and ensure solid ground plane connection to the anode for effective clamping-details are in the "Mechanical Data" section of document 88394.
SMCJ48AHE3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 48V
- Voltage - Breakdown (Min):
- 53.3V
- Voltage - Clamping (Max) @ Ipp:
- 77.4V
- Current - Peak Pulse (10/1000µs):
- 19.4A
- 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)
SMCJ48AHE3/9AT FAQ
1.How can I place an order for SMCJ48AHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ48AHE3/9AT 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 SMCJ48AHE3/9AT reliable?
The price and inventory of SMCJ48AHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ48AHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ48AHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ48AHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ48AHE3/9AT?
SMCJ48AHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ48AHE3/9AT 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 SMCJ48AHE3/9AT?
For technical support, including SMCJ48AHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ48AHE3/9AT requirements.
6.How does Aetrix verify that SMCJ48AHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ48AHE3/9AT 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 SMCJ48AHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ48AHE3/9AT?
All SMCJ48AHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ48AHE3/9AT, 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 SMCJ48AHE3/9AT part is unused and in its original packaging.
Return procedure for SMCJ48AHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ48AHE3/9AT 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 …
