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Semtech Corporation SC3BH6
- Part No.:
- SC3BH6
- Manufacturer:
- Semtech Corporation
- Category:
- Bridge Rectifiers
- Package:
- 4-Rectangle
- Datasheet:
-
SC3BH6.pdf
- Description:
- BRIDGE RECT 3PHASE 600V 4A
- Quantity:
- Payment:
- Shipping:
Inventory:7,199
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Product details
Overview
SC3BH6 from Semtech is a Transient Diverting Suppressor (TDS) designed for high-energy EOS protection of 22V-rated power or I/O lines, featuring ±30kV IEC 61000-4-2 ESD immunity, 40A peak pulse current (8/20μs), and stable 27.5–28V clamping voltage across temperature and current range. It protects USB PD, USB Type-C VBus, and load switch inputs in industrial and portable electronics.
For engineers reviewing the SC3BH6 datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, DFN-6 package layout guidance, real-world clamping behavior vs. conventional TVS, and validated alternatives for 22V bus protection design.
Technical Context
The SC3BH6 uses a surge-rated FET as its primary protection element, activated by a precision trigger circuit that turns on the shunt path when transient voltage exceeds breakdown. Its clamping voltage remains nearly constant (27.5–28V) from 24A to 40A due to decreasing RDS(on), unlike TVS diodes whose VC rises linearly with IPP.
It operates over –40°C to +125°C, maintains <600nA reverse leakage at 22V, and exhibits only 20mΩ dynamic resistance (8/20μs). The device is optimized for unsymmetrical line protection with 2Ω source impedance per IEC 61000-4-5 combination wave testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - matches nominal USB PD VBus and industrial 24V rail systems without derating. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs + 1.2/50μs combo wave) - stays below 30V threshold to protect 30V-tolerant controllers. |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Level 4 surge immunity for industrial equipment. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds Class 4 requirements for handheld and connector-facing interfaces. |
| Dynamic Resistance | 20mΩ - enables low-voltage overshoot during fast transients, critical for sensitive downstream FETs. |
| Junction Capacitance | 175pF at 22V, 1MHz - suitable for DC/low-speed power rails; not intended for high-speed data lines. |
Pinout & Package
SC3BH6 is housed in a Pb-free, RoHS-compliant DFN-6 package measuring 1.6mm × 1.6mm × 0.55mm with exposed thermal pad (no solder mask defined). All six terminals are electrically active: three parallel input pins and three parallel ground pins for low-inductance surge conduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | GND | Common ground return path; all three must be connected to minimize inductance and maximize 40A surge handling. |
| Pins 4, 5, 6 | IN | Parallel-connected protected line input; ties directly to VBus or load switch input; requires shortest possible trace to connector. |
Key Features
| Feature | Design Value |
|---|---|
| FET-based shunt architecture | Delivers flat clamping voltage (27.5–28V) from 24A to 40A-eliminates overvoltage risk at high surge currents. |
| Temperature-stable clamping | Clamping voltage variation <0.5V from –40°C to +125°C-enables reliable protection in uncontrolled thermal environments. |
| Low dynamic resistance | 20mΩ ensures minimal IR drop during surge, preserving voltage margin for downstream 30V-rated ICs. |
| High EFT immunity | ±4kV per IEC 61000-4-4 (5/50ns, 100kHz/5kHz)-protects against repetitive burst noise in motor drives and PLCs. |
Applications
| USB Type-C Power Delivery Bus Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting the VBus line of a USB Type-C port supporting up to 20V/5A PD negotiation against lightning-induced surges and connector ESD. IC Role / Device Role / Timing Role: Primary EOS shunt suppressor placed between connector and PD controller or load switch input. Use Value: Maintains clamping at ≤28V across full 40A surge and –40°C to +125°C, preventing damage to 30V-rated PD controllers where standard TVS would exceed 35V. |
Use Scenario: Safeguarding the VIN pin of high-side load switches (e.g., HS2950P) in remote meters and robotics against 1kV/42Ω surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: Front-end transient clamp limiting voltage seen by internal switch FET gate oxide and drain-source junction. Use Value: Prevents gate oxide rupture and avalanche failure by holding clamp voltage below 30V even at 40A, extending switch lifetime under repeated surge stress. |
| IoT Device DC Power Rail Protection | Notebook/Tablet Main Power Input Protection |
Use Scenario: Securing 22V-rated auxiliary power inputs on battery-powered IoT gateways exposed to field ESD and induced surges via long cables. IC Role / Device Role / Timing Role: Single-point, low-footprint transient suppressor on main DC input before PMIC or buck converter. Use Value: 1.6mm × 1.6mm DFN footprint saves >60% board area versus SOD-123 TVS while delivering superior clamping stability and 40A rating. |
Use Scenario: Protecting the 20V input stage of ultrabook charging circuits against accidental 220V AC coupling or ESD during hot-plug events. IC Role / Device Role / Timing Role: First-line defense on main adapter input rail, upstream of OVP and e-fuse ICs. Use Value: Enables robust compliance with IEC 61000-4-2 and -4-5 without requiring oversized TVS or redundant stages-reducing BOM count and cost. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDS2211P.C | Identical electrical specs, same DFN-6 package, identical marking code T22; manufactured by Semtech as direct variant. | No functional difference; used interchangeably in production for USB PD and industrial designs. | Select TDS2211P.C when sourcing from authorized Semtech distribution channels with full traceability. |
| SMAJ22A | Standard unidirectional TVS diode; 22V VRWM, 35.5V VC @ 12.3A; higher clamping, no flat-VC behavior, 200W PPPK. | Limited to lower-energy transients; clamping rises to >40V at 40A and degrades above 85°C. | Choose SMAJ22A only for cost-sensitive, non-critical 22V rails where 40A surge capability and temperature stability are not required. |
Compared with SC3BH6, TDS2211P.C offers identical performance and supply chain continuity, while SMAJ22A provides lower-cost surge suppression at the expense of clamping accuracy, temperature stability, and peak current capability-making SC3BH6 the preferred choice for mission-critical 22V bus protection.
Availability
SC3BH6 is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load switch inputs, and IoT device DC power rails requiring stable component supply, full RoHS compliance, and guaranteed surge performance across temperature extremes.
Supply support for SC3BH6 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
Semtech Corporation is a U.S.-based fabless semiconductor company specializing in analog and mixed-signal ICs for precision protection, signal integrity, and power management.
The SC3BH6 belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered specifically to replace conventional TVS diodes in high-reliability 22V power rail protection where flat clamping and temperature stability are mandatory.
FAQ
What is the maximum operating temperature range for SC3BH6?
The SC3BH6 is rated for continuous operation from –40°C to +125°C ambient temperature. Its clamping voltage remains stable within 27.5–28V across this full range, and junction temperature can reach +150°C during transient events. This makes SC3BH6 suitable for under-hood automotive modules, industrial control cabinets, and high-power portable devices where thermal management is constrained.
Does SC3BH6 require a thermal pad or heatsink on the PCB?
No, SC3BH6 does not require an external thermal pad or heatsink. Unlike TVS diodes that dissipate energy in the PN junction, SC3BH6 routes surge current through a low-RDS(on) FET, minimizing localized heating. The DFN-6 package relies on copper pour and multiple vias to ground for effective transient energy dissipation-per Semtech's layout guidelines, no thermal pad is needed or recommended.
Can SC3BH6 be used on high-speed data lines like USB SuperSpeed or PCIe?
No, SC3BH6 is not suitable for high-speed data lines. With 175pF junction capacitance at 22V, it would severely degrade signal integrity on differential pairs operating above 100MHz. SC3BH6 is explicitly designed for DC or low-frequency power rails (e.g., USB PD VBus, load switch inputs); for SuperSpeed lanes, Semtech recommends RClamp3371ZC (<0.25pF) instead.
How does SC3BH6 differ from a standard TVS diode in surge response?
SC3BH6 uses an actively triggered FET shunt, resulting in near-constant clamping voltage (27.5–28V) from 24A to 40A and across –40°C to +125°C. In contrast, a standard TVS diode's clamping voltage rises linearly with current (VC = VBR + IPP × RDYN) and increases significantly with temperature-e.g., a typical 22V TVS may clamp at >40V at 40A and 125°C, risking downstream IC damage.
Is SC3BH6 pin-compatible with other Semtech TDS devices like TDS2411P?
No, SC3BH6 is not pin-compatible with TDS2411P. While both use DFN-6 packages, TDS2411P has different pin assignments (e.g., separate enable/control pins) and targets 24V systems with distinct trigger thresholds. SC3BH6 has a fixed 3-pin IN / 3-pin GND configuration optimized for simplicity and low-inductance layout-interchanging them would result in incorrect connection and loss of protection.
SC3BH6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Series:
- -
- Package/Case:
- 4-Rectangle
- Packaging:
- Bulk
- Product Status:
- Discontinued at Digi-Key
- Diode Type:
- Three Phase
- Technology:
- Standard
- Voltage - Peak Reverse (Max):
- 600 V
- Current - Average Rectified (Io):
- 4 A
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 3 A
- Current - Reverse Leakage @ Vr:
- 3 µA @ 600 V
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- QC Terminal
- Supplier Device Package:
- -
SC3BH6 FAQ
1.How can I place an order for SC3BH6 through Aetrix?
Please submit a Request for Quotation (RFQ) for SC3BH6 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 SC3BH6 reliable?
The price and inventory of SC3BH6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC3BH6 is usually 5 days.
3.What payment methods are accepted for SC3BH6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC3BH6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC3BH6?
SC3BH6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC3BH6 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 SC3BH6?
For technical support, including SC3BH6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC3BH6 requirements.
6.How does Aetrix verify that SC3BH6 is sourced from the original manufacturer or authorized distributors?
All SC3BH6 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 SC3BH6 meets industry standards.
7.What is the process for return or replacement of SC3BH6?
All SC3BH6 units undergo pre-shipment inspection (PSI). If there is an issue with SC3BH6, 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 SC3BH6 part is unused and in its original packaging.
Return procedure for SC3BH6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SC3BH6 Tags
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DF04M
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