My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMCJ9.0AHE3/9AT
- Part No.:
- SMCJ9.0AHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ9.0AHE3/9AT.pdf
- Description:
- TVS DIODE 9VWM 15.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,481
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMCJ9.0AHE3/9AT from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection in DC power rails and signal lines. It features a 9.0 V standoff voltage (VWM), 10.0–11.1 V breakdown voltage (VBR) at 1 mA, 15.4 V clamping voltage (VC) at 97.4 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed in automotive engine control units to safeguard microcontroller I/O against load-dump transients.
For engineers reviewing the SMCJ9.0AHE3/9AT datasheet, SMCJ9.0AHE3/9AT pinout, SMCJ9.0AHE3/9AT application, or SMCJ9.0AHE3/9AT equivalent, key selection criteria include its AEC-Q101 qualification, DO-214AB (SMC) package thermal performance (RθJA = 75 °C/W), unidirectional polarity with cathode band marking, and compliance with UL 497B for telecom and industrial surge protection systems.
Technical Context
The SMCJ9.0AHE3/9AT operates as a clamping-type TVS diode with avalanche breakdown behavior, triggered when reverse voltage exceeds its 10.0–11.1 V VBR range. Its low incremental surge resistance ensures minimal voltage overshoot during fast 10/1000 µs transients, while the glass-passivated junction delivers stable leakage (<10 µA at 9.0 V) and long-term reliability under repeated surge stress.
Designed for surface-mount automated assembly, it meets J-STD-020 MSL Level 1 (peak reflow 260 °C) and JESD201 Class 2 whisker resistance. The matte tin-plated leads are solderable per J-STD-002 and JESD22-B102, and its UL 94 V-0 molding compound supports high-density PCB layouts in harsh environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 9.0 V - maximum continuous reverse operating voltage before clamping begins; sets safe DC rail margin for 12 V automotive systems. |
| VBR (min/max) | 10.0 V / 11.1 V at IT = 1 mA - defines precise avalanche initiation threshold; tight 10% tolerance enables predictable protection timing. |
| VC @ IPPM | 15.4 V at 97.4 A - clamped voltage during 1500 W transient; limits downstream IC stress below 16 V during ISO 7637-2 Pulse 5a events. |
| PPPM | 1500 W - peak pulse power handling with 10/1000 µs waveform; supports high-energy surges common in industrial motor drives. |
| ID @ VWM | ≤10 µA - ultra-low reverse leakage at rated standoff; preserves battery life in always-on automotive modules. |
| TJ max. | +150 °C - extended junction temperature rating enables under-hood deployment without derating in ECU power stages. |
| RθJA | 75 °C/W - thermal resistance from junction to ambient on standard 8 mm × 8 mm copper pads; informs heatsinking requirements for sustained surge duty. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, molded plastic case with matte tin-plated leads. Cathode indicated by a visible band on the body; anode is unmarked end. Meets UL 94 V-0 flammability rating and AEC-Q101 qualification for automotive use.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line; conducts surge current to ground when VREV > VBR; must be routed with low-inductance path to chassis or power ground. |
| Anode (unbanded end) | Reference/ground return | Typically tied to system ground or low-impedance return plane; forms clamping loop with cathode; polarity-critical for unidirectional operation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and surge endurance - required for engine control, ADAS, and body electronics. |
| Glass-passivated junction | Eliminates moisture-induced degradation and improves long-term VBR stability across -55 °C to +150 °C operating range. |
| Low clamping ratio (VC/VBR ≈ 1.5) | Minimizes overvoltage overshoot during fast transients - critical for protecting 3.3 V or 5 V logic interfaces downstream of protection stage. |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free reflow without popcorn cracking or delamination - compatible with high-volume SMT production lines. |
| UL 497B recognized (QVGQ2) | Meets Underwriters Laboratories requirements for telecom/data line protectors - simplifies safety certification for industrial gateways and PoE equipment. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Suppressing load-dump transients (up to 35 V, 100 ms) on 12 V battery-fed ECUs in passenger vehicles. IC Role / Device Role / Timing Role: Primary clamping device placed between battery input and DC-DC converter input stage. Use Value: Limits voltage seen by downstream regulator to ≤15.4 V during ISO 7637-2 Pulse 5a, preventing latch-up or permanent damage to LDOs and MCUs. |
Use Scenario: Protecting analog sensor outputs (e.g., pressure, temperature) in factory automation PLC I/O modules from ESD and inductive switching noise. IC Role / Device Role / Timing Role: Low-capacitance shunt protector on differential or single-ended signal traces upstream of ADC front-end. Use Value: Clamps fast 8 kV HBM ESD events to <16 V within <1 ns, preserving signal integrity and avoiding ADC saturation or reset. |
| Telecom Line Surge Suppression | Consumer Power Adapter Input Stage |
|
Use Scenario: Safeguarding Ethernet PHY power pins and data lines in industrial switches exposed to lightning-induced surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: Secondary-level TVS on 3.3 V/5 V auxiliary rails feeding PHY ICs and magnetics bias circuits. Use Value: Absorbs 1500 W surge energy without failure, maintaining UL 497B recognition and enabling Class B immunity compliance. |
Use Scenario: Overvoltage protection on primary-side DC bus of USB-C PD adapters after bridge rectification but before PFC controller. IC Role / Device Role / Timing Role: Unidirectional clamp on bulk capacitor input to limit transient spikes from AC line switching or lightning. Use Value: Withstands repetitive 10/1000 µs surges up to 97.4 A while maintaining <10 µA leakage - ensures no standby power penalty or thermal drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ9.0AHE3/A | Lower PPPM (400 W vs. 1500 W); same VWM/VBR/VC; SMA (DO-214AC) package - smaller footprint but higher RθJA (110 °C/W). | Restricted to lower-energy transients (e.g., ESD-only); unsuitable for load-dump or IEC 61000-4-5 Level 3/4. | Select only when space-constrained and surge energy is ≤400 W; verify thermal margin with board layout. |
| SMCJ9.0CAHE3/9AT | Bidirectional variant; identical VWM/VBR/VC ratings but symmetric clamping in both polarities; same package and AEC-Q101 grade. | Required for AC-coupled or floating signal lines (e.g., RS-485, CAN FD) where polarity reversal occurs. | Choose when protecting bidirectional buses; note that ID doubles to 20 µA at VWM due to dual-junction structure. |
Compared with SMAJ9.0AHE3/A and SMCJ9.0CAHE3/9AT, the SMCJ9.0AHE3/9AT uniquely balances high-energy 1500 W clamping, AEC-Q101 qualification, and DO-214AB thermal performance - making it the preferred choice for automotive power rail and industrial DC bus protection where both robustness and reliability are non-negotiable.
Availability
SMCJ9.0AHE3/9AT is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLCs, telecom infrastructure, and consumer power adapters requiring stable component supply across multi-year production cycles.
Supply support for SMCJ9.0AHE3/9AT 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, efficiency, and application-specific optimization.
The SMCJ series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in automotive, industrial, and telecom systems where AEC-Q101 compliance and UL recognition are mandatory.
FAQ
What is the clamping voltage of the SMCJ9.0AHE3/9AT under maximum surge conditions?
The SMCJ9.0AHE3/9AT has a maximum clamping voltage (VC) of 15.4 V when subjected to its rated peak pulse current of 97.4 A using a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 standards and ensures downstream circuitry remains within safe operating limits during high-energy transients such as automotive load dump or industrial switching surges.
Is the SMCJ9.0AHE3/9AT suitable for automotive applications?
Yes, the SMCJ9.0AHE3/9AT is AEC-Q101 qualified and explicitly designated for automotive use with the "HE3" suffix. It meets stringent requirements for temperature cycling, surge endurance, and mechanical robustness - validated for deployment in engine control units, body control modules, and ADAS power supplies where reliability under under-hood conditions is critical.
How does the SMCJ9.0AHE3/9AT differ from the bidirectional SMCJ9.0CAHE3/9AT?
The SMCJ9.0AHE3/9AT is unidirectional with cathode band marking and optimized for DC rail protection, while the SMCJ9.0CAHE3/9AT is bidirectional with symmetrical clamping in both polarities and no polarity marking. Both share identical VWM (9.0 V), VBR (10.0–11.1 V), VC (15.4 V), and AEC-Q101 qualification, but the bidirectional version allows use on AC-coupled or floating lines like CAN or RS-485.
What is the thermal resistance of the SMCJ9.0AHE3/9AT, and how does it affect layout?
The SMCJ9.0AHE3/9AT 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. To maintain safe junction temperatures during repeated surges, PCB layout must provide adequate copper area and minimize trace inductance - especially for the cathode-to-ground path - to avoid localized heating or premature failure.
Does the SMCJ9.0AHE3/9AT meet UL safety standards?
Yes, the SMCJ9.0AHE3/9AT is UL recognized under file E136766 for both unidirectional and bidirectional variants, complying with UL 497B for protectors used in telecommunications and data line applications. This recognition supports faster regulatory approval for industrial gateways, PoE injectors, and network equipment requiring certified surge protection.
SMCJ9.0AHE3/9AT 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):
- 9V
- Voltage - Breakdown (Min):
- 10V
- Voltage - Clamping (Max) @ Ipp:
- 15.4V
- Current - Peak Pulse (10/1000µs):
- 97.4A
- 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)
SMCJ9.0AHE3/9AT FAQ
1.How can I place an order for SMCJ9.0AHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ9.0AHE3/9AT 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 SMCJ9.0AHE3/9AT reliable?
The price and inventory of SMCJ9.0AHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ9.0AHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ9.0AHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ9.0AHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ9.0AHE3/9AT?
SMCJ9.0AHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ9.0AHE3/9AT 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 SMCJ9.0AHE3/9AT?
For technical support, including SMCJ9.0AHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ9.0AHE3/9AT requirements.
6.How does Aetrix verify that SMCJ9.0AHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ9.0AHE3/9AT 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 SMCJ9.0AHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ9.0AHE3/9AT?
All SMCJ9.0AHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ9.0AHE3/9AT, 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 SMCJ9.0AHE3/9AT part is unused and in its original packaging.
Return procedure for SMCJ9.0AHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ9.0AHE3/9AT 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
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 …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
