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Semtech Corporation SMBJ60CA
- Part No.:
- SMBJ60CA
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ60CA.pdf
- Description:
- 1-LINE 60V 6.2A TVS DO-214AA(SMB
- Quantity:
- Payment:
- Shipping:
Inventory:2,372
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Product details
Overview
SMBJ60CA from Littelfuse is a bidirectional transient voltage suppression diode designed for high-energy surge protection on DC power rails and I/O lines. It features a 60V reverse standoff voltage, 96.8V maximum clamping voltage at 10A peak pulse current (8/20μs), 600W peak pulse power rating, and ±30kV ESD immunity per IEC 61000-4-2 - deployed in industrial power supplies and automotive body electronics.
For engineers reviewing the SMBJ60CA datasheet, pinout, applications, or equivalent options, key selection criteria include its unidirectional/bidirectional configuration, junction capacitance under bias, thermal derating behavior above +25°C, and compatibility with IPC-7351B SO-201AA footprint requirements.
Technical Context
The SMBJ60CA operates as a silicon avalanche diode with symmetrical breakdown characteristics for bidirectional transient suppression. Its clamping response is governed by controlled avalanche multiplication in the PN junction, delivering sub-nanosecond turn-on time and stable voltage limiting across temperature (-65°C to +150°C).
It complies with IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and IEC 61000-4-5 (surge) standards. The device uses a planar passivated junction structure optimized for low leakage (<1μA at VRWM) and repeatable breakdown uniformity without triggering circuitry or active elements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Standoff Voltage | 60 V - Maximum continuous DC or RMS voltage the device blocks without significant leakage. |
| Breakdown Voltage (Min) | 66.7 V - Guaranteed minimum avalanche initiation voltage at 1mA test current; defines lower bound of clamping onset. |
| Clamping Voltage (10A) | 96.8 V - Maximum voltage seen across protected line during 10A 8/20μs surge; determines downstream component stress margin. |
| Peak Pulse Power | 600 W - Energy-handling capability for single 8/20μs waveform; sets maximum surge severity it can absorb without failure. |
| Leakage Current (60V) | 1 μA - Reverse-bias leakage at rated standoff; impacts low-power system quiescent current and signal integrity. |
| Junction Temperature Range | -65°C to +150°C - Valid operating range for thermal design; derating required above +25°C for sustained power dissipation. |
Pinout & Package
Package: DO-214AA (SMB) - surface-mount plastic package with gull-wing leads, 4.57mm × 3.94mm body, 2.29mm height, IPC-7351B compliant SO-201AA footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Cathode Band Side) | Transient return path for negative polarity surges | Connected to ground or low-impedance return plane; must be routed with minimal inductance to preserve clamping speed. |
| Cathode (Banded End) | Transient return path for positive polarity surges | In bidirectional configuration, cathode and anode are functionally symmetric; banded end denotes conventional marking reference only. |
Key Features
| Feature | Design Value |
|---|---|
| IEC 61000-4-2 ESD robustness | ±30 kV contact discharge - eliminates need for secondary ESD stages in USB, CAN, or sensor interfaces. |
| Low clamping ratio (VC/VRWM) | 1.61 - ensures protected ICs with 100V absolute max ratings remain within safe margin even at full surge current. |
| Planar passivated junction | Enables stable breakdown voltage distribution and <1μA leakage at 60V - critical for battery-powered systems. |
| RoHS-compliant matte tin lead finish | Compatible with lead-free reflow profiles (JEDEC J-STD-020D); supports automated SMT assembly without whisker risk. |
Applications
| Industrial Power Input Protection | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: 24V DC input rail in programmable logic controllers exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Primary surge shunt element placed upstream of DC-DC converter input filter. Use Value: Clamps transients to ≤96.8V, preventing overvoltage damage to 100V-rated MOSFETs and controller ICs. |
Use Scenario: LIN bus transceiver power supply line subject to battery reversal and jump-start surges. IC Role / Device Role / Timing Role: Bidirectional rail clamp between VBAT and GND, absorbing both positive and negative polarity events. Use Value: Maintains <1μA leakage at 24V nominal, avoiding excessive quiescent drain on vehicle battery during sleep mode. |
| USB-C Power Delivery Port | Smart Meter Communication Interface |
Use Scenario: VBUS line protection in USB-C PD sink applications where up to 20V is present during negotiation. IC Role / Device Role / Timing Role: Secondary overvoltage clamp after primary fuse and common-mode choke, handling residual surges. Use Value: Withstands ±30kV ESD per IEC 61000-4-2, protecting PD controller during hot-plug events without latch-up. |
Use Scenario: RS-485 transceiver power rail in utility smart meters installed in outdoor substations. IC Role / Device Role / Timing Role: DC rail protector against induced lightning surges coupled via long field wiring. Use Value: 600W peak power rating sustains multiple 1kV/0.5μF IEC 61000-4-5 surges without degradation or parametric shift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ60A | Unidirectional version - only suppresses positive surges relative to ground; requires explicit ground reference. | Suitable for DC rails with known polarity; not usable on AC-coupled or floating lines. | Select SMBJ60A only when circuit topology guarantees fixed voltage polarity and ground-referenced surge paths. |
| P6SMB60CA | Same electrical specs but manufactured by ON Semiconductor; identical DO-214AA package and pinout. | No functional difference; validated drop-in replacement with same thermal and layout requirements. | Choose P6SMB60CA for dual-sourcing assurance or when Littelfuse supply constraints exist. |
Compared with SMBJ60A, SMBJ60CA provides symmetrical protection without polarity assumptions, while P6SMB60CA offers identical performance with alternate supply chain traceability - both require no PCB changes but differ in sourcing strategy and grounding dependency.
Availability
SMBJ60CA is available at Aetrix Electronics and suitable for industrial power supplies, automotive BCM modules, and USB-C PD port designs requiring stable component supply, consistent parametric performance, and long-term lifecycle support.
Supply support for SMBJ60CA 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
Littelfuse is a global leader in circuit protection, specializing in fuses, TVS diodes, and surge suppression technologies since 1927.
The SMBJ series is engineered for high-reliability DC rail protection in harsh environments, targeting automotive, industrial, and telecom infrastructure applications where surge immunity and long-term stability are critical.
FAQ
What is the maximum clamping voltage of SMBJ60CA at 10A surge current?
The SMBJ60CA has a maximum clamping voltage of 96.8 V when subjected to a 10 A peak pulse current with an 8/20 μs waveform. This value is measured per IEC 61000-4-5 and defines the upper voltage limit imposed on protected circuitry during standardized surge events. The SMBJ60CA maintains this clamping performance across its full operating temperature range.
Is SMBJ60CA unidirectional or bidirectional?
SMBJ60CA is a bidirectional TVS diode, meaning it provides symmetrical transient suppression for both positive- and negative-polarity voltage spikes relative to ground. Its "CA" suffix explicitly denotes bidirectional configuration, distinguishing it from the unidirectional SMBJ60A variant. This makes SMBJ60CA suitable for AC lines, floating buses, and applications where polarity cannot be guaranteed.
What package type does SMBJ60CA use, and is it RoHS-compliant?
SMBJ60CA uses the DO-214AA (SMB) surface-mount package - a standardized 2-pin gull-wing outline measuring 4.57 mm × 3.94 mm with 2.29 mm height. It is fully RoHS-compliant, featuring matte tin-plated leads compatible with lead-free reflow soldering per JEDEC J-STD-020D, and meets halogen-free and REACH requirements.
How does SMBJ60CA compare to standard Zener-based TVS diodes in terms of leakage current?
SMBJ60CA exhibits ≤1 μA reverse leakage current at its 60 V standoff voltage and 25°C ambient, significantly lower than many older Zener-clamp TVS devices that may exceed 5–10 μA at similar voltages. This low leakage preserves battery life in always-on systems and avoids false triggering in high-impedance sensing circuits - a key advantage confirmed in Littelfuse's published electrical characteristics table for SMBJ60CA.
Can SMBJ60CA be used in parallel to increase surge current handling?
No - SMBJ60CA should not be paralleled without external current-balancing resistors or matched dynamic impedance binning. Due to manufacturing tolerances in breakdown voltage (66.7–73.3 V), paralleling units risks current hogging, thermal runaway, and premature failure. For higher surge ratings, select a higher-power variant like 1.5SMC60CA instead of paralleling SMBJ60CA units.
SMBJ60CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- DO-214AA, SMB
- Series:
- SMBJ
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 60V
- Voltage - Breakdown (Min):
- 66.7V
- Voltage - Clamping (Max) @ Ipp:
- 96.8V
- Current - Peak Pulse (10/1000µs):
- 6.2A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ60CA FAQ
1.How can I place an order for SMBJ60CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ60CA 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 SMBJ60CA reliable?
The price and inventory of SMBJ60CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ60CA is usually 5 days.
3.What payment methods are accepted for SMBJ60CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ60CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ60CA?
SMBJ60CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ60CA 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 SMBJ60CA?
For technical support, including SMBJ60CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ60CA requirements.
6.How does Aetrix verify that SMBJ60CA is sourced from the original manufacturer or authorized distributors?
All SMBJ60CA 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 SMBJ60CA meets industry standards.
7.What is the process for return or replacement of SMBJ60CA?
All SMBJ60CA units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ60CA, 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 SMBJ60CA part is unused and in its original packaging.
Return procedure for SMBJ60CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ60CA Tags
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