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Vishay General Semiconductor - Diodes Division SMBJ120CAHE3/5B
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- Part No.:
- SMBJ120CAHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ120CAHE3/5B.pdf
- Description:
- TVS DIODE 120VWM 193VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,397
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Product details
Overview
SMBJ120CAHE3/5B from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features a 120 V stand-off voltage (VWM), 133–147 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 µs), and clamps to ≤193 V at 3.1 A peak surge current - used to protect MOSFETs, ICs, and sensor interfaces in industrial motor drives.
For engineers reviewing the SMBJ120CAHE3/5B datasheet, SMBJ120CAHE3/5B pinout, SMBJ120CAHE3/5B application, or SMBJ120CAHE3/5B equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), and compatibility with automated SMT assembly on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a voltage-clamping protector with symmetrical bidirectional avalanche behavior - no polarity marking required. Its glass-passivated junction enables fast response time (<1 ns) and low incremental surge resistance, critical for suppressing ESD and inductive switching spikes.
Rated for -55 °C to +150 °C junction temperature, it meets MSL Level 1 (260 °C reflow peak) and supports repetitive surge duty cycles up to 0.01 %. The AEC-Q101 qualified HE3 suffix confirms automotive-grade reliability under accelerated stress testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 120 V - maximum continuous reverse voltage before significant leakage; defines operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 133–147 V at 1 mA - guaranteed avalanche onset range; ensures predictable turn-on during overvoltage events |
| VC (Clamping Voltage) | ≤193 V at IPPM = 3.1 A (10/1000 µs) - peak voltage seen by protected circuit during worst-case transient |
| PPPM (Peak Pulse Power) | 600 W - energy-handling capacity for standardized 10/1000 µs surge waveform; determines survivability of lightning or load-switch surges |
| ID (Max Reverse Leakage) | 1.0 µA at VWM - minimal standby power loss and negligible impact on high-impedance sensor or bias networks |
| RθJA | 100 °C/W - thermal resistance from junction to ambient on standard 0.2" × 0.2" copper pads; informs derating above 25 °C ambient |
| TJ max. | +150 °C - maximum allowable junction temperature; sets upper limit for power dissipation and PCB layout thermal design |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Matte tin-plated leads, RoHS-compliant and AEC-Q101 qualified (HE3 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (bidirectional) | Acts as cathode during positive transients; forms symmetrical conduction path with cathode terminal |
| Cathode | Transient current exit (bidirectional) | Acts as anode during negative transients; completes low-impedance clamp path across both polarities |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC lines or floating DC buses without polarity concerns |
| 600 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 Level 4 surge immunity (4 kV line-to-line) with appropriate series impedance |
| AEC-Q101 qualification (HE3 suffix) | Validated for automotive powertrain and body electronics where reliability under thermal cycling and vibration is mandatory |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profile (peak 260 °C) without baking preconditioning |
| Glass-passivated junction | Ensures stable VBR over lifetime and immunity to humidity-induced parameter drift in harsh environments |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of gate drivers and microcontroller I/O against inductive kickback from relay coils and solenoid loads. IC Role / Device Role / Timing Role: Voltage clamp placed across relay coil or MOSFET drain-source to divert surge energy away from sensitive logic. Use Value: Limits transient voltage to ≤193 V, preventing latch-up or permanent damage to 3.3 V/5 V MCU GPIO and level-shifters. |
Use Scenario: Safeguarding LIN bus transceivers and door module sensors from battery dump and load-dump events. IC Role / Device Role / Timing Role: Bidirectional TVS connected between LIN line and ground to absorb ±100 V transients per ISO 7637-2 Pulse 5a. Use Value: Maintains signal integrity during 12 V system load-dump surges while drawing <1 µA at nominal 12 V operation. |
| Telecom Power Supply Inputs | Industrial PLC Analog Input Channels |
|
Use Scenario: Front-end protection of 48 V telecom rectifier outputs against lightning-induced surges on distribution lines. IC Role / Device Role / Timing Role: Primary clamping device upstream of DC-DC converters and hot-swap controllers. Use Value: Withstands 600 W pulses without degradation, enabling compliance with ITU-T K.20 and GR-1089-CORE standards. |
Use Scenario: Shielding 4–20 mA current loop receivers and ADC front-ends from field wiring transients in factory automation. IC Role / Device Role / Timing Role: Low-leakage (1 µA) bidirectional clamp across input terminals to prevent overvoltage saturation of op-amp stages. Use Value: Preserves measurement accuracy by limiting input excursion to <193 V while adding negligible offset error. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ120CA-M3/5B | Halogen-free, RoHS-compliant, commercial grade - lacks AEC-Q101 qualification | Not approved for automotive under-hood or safety-critical modules | Select when cost-sensitive industrial designs require halogen-free compliance but not automotive qualification |
| SMCJ120CAHE3/5B | Same VWM/VBR/VC specs but in larger SMC (DO-214AB) package with 1500 W PPPM rating | Higher power handling requires more PCB area; suited for primary-level surge protection | Choose when system-level surge requirements exceed 600 W or when board space allows larger footprint |
Compared with SMBJ120CAHE3/5B, the M3/5B variant trades automotive qualification for halogen-free compliance, while the SMCJ120CAHE3/5B offers 2.5× higher surge power in a physically larger package - making SMBJ120CAHE3/5B optimal for space-constrained AEC-Q101 applications needing precise 600 W clamping.
Availability
SMBJ120CAHE3/5B is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom power supply inputs requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBJ120CAHE3/5B 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 high-volume manufacturability.
The SMBJ series targets robust, surface-mount transient protection for automotive, industrial, and telecom systems - engineered for automated assembly, high surge resilience, and extended temperature operation.
FAQ
What does the "CA" suffix indicate in SMBJ120CAHE3/5B?
The "CA" suffix denotes a bidirectional configuration - meaning SMBJ120CAHE3/5B provides symmetrical clamping for both positive and negative transients without polarity dependence. Unlike unidirectional variants (e.g., SMBJ120A), it has no cathode band marking and is used where AC signals or floating DC rails require protection in both directions.
Is SMBJ120CAHE3/5B qualified for automotive applications?
Yes, SMBJ120CAHE3/5B is AEC-Q101 qualified, as confirmed by the "HE3" suffix and Vishay documentation. This qualification covers stress tests including temperature cycling, mechanical shock, and high-temperature operating life - making SMBJ120CAHE3/5B suitable for automotive body electronics, infotainment power supplies, and non-safety-critical control units.
What is the maximum clamping voltage of SMBJ120CAHE3/5B under surge conditions?
The maximum clamping voltage (VC) of SMBJ120CAHE3/5B is 193 V at a peak pulse current (IPPM) of 3.1 A with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the highest voltage imposed on the protected circuit during standardized surge events.
How does the SMB (DO-214AA) package of SMBJ120CAHE3/5B compare to SMC (DO-214AB)?
The SMB package of SMBJ120CAHE3/5B measures 4.57 mm × 3.94 mm × 2.29 mm, offering ~40 % smaller footprint than SMC. While both share similar electrical specs, SMBJ120CAHE3/5B delivers 600 W PPPM versus 1500 W for SMCJ equivalents - making SMB ideal for space-constrained layouts where 600 W surge handling suffices.
What is the thermal resistance of SMBJ120CAHE3/5B, and how does it affect layout?
SMBJ120CAHE3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain TJ ≤ 150 °C at full 5.0 W steady-state dissipation, PCB layout must provide adequate copper area and avoid excessive ambient temperature rise - especially in enclosed enclosures.
SMBJ120CAHE3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 120V
- Voltage - Breakdown (Min):
- 133V
- Voltage - Clamping (Max) @ Ipp:
- 193V
- Current - Peak Pulse (10/1000µs):
- 3.1A
- Power - Peak Pulse:
- 600W
- 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-214AA (SMBJ)
SMBJ120CAHE3/5B FAQ
1.How can I place an order for SMBJ120CAHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ120CAHE3/5B 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 SMBJ120CAHE3/5B reliable?
The price and inventory of SMBJ120CAHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ120CAHE3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ120CAHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ120CAHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ120CAHE3/5B?
SMBJ120CAHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ120CAHE3/5B 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 SMBJ120CAHE3/5B?
For technical support, including SMBJ120CAHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ120CAHE3/5B requirements.
6.How does Aetrix verify that SMBJ120CAHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ120CAHE3/5B 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 SMBJ120CAHE3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ120CAHE3/5B?
All SMBJ120CAHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ120CAHE3/5B, 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 SMBJ120CAHE3/5B part is unused and in its original packaging.
Return procedure for SMBJ120CAHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ120CAHE3/5B Tags
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