My Inquiry
My Account
STMicroelectronics SMA6J48CA-TR
- Part No.:
- SMA6J48CA-TR
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA6J48CA-TR.pdf
- Description:
- TVS DIODE 48VWM 88.4VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:14,372
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMA6J48CA-TR from STMicroelectronics is a bidirectional 48 V standoff transient voltage suppression (TVS) diode in SMA package, rated for 600 W peak pulse power (10/1000 µs), 4 kV IEC 61000-4-4 level 4 surge immunity, and 30 kV ESD protection (IEC 61000-4-2, air/contact discharge). It operates up to 175 °C junction temperature with <0.2 µA leakage at 25 °C and clamps transients to 75.4 V at 8.1 A (10/1000 µs), protecting Ethernet PHYs, industrial I/O ports, and automotive body control modules.
For engineers reviewing the SMA6J48CA-TR datasheet, SMA6J48CA-TR pinout, SMA6J48CA-TR application, or SMA6J48CA-TR equivalent, key selection criteria include bidirectional clamping voltage (VCL = 75.4 V @ 8.1 A), low dynamic resistance (RD = 1.03 Ω), high-temperature reliability (Tj max = 175 °C), UL94 V0 resin compliance, and JEDEC DO-214AC (SMA) footprint compatibility per IPC-7531.
Technical Context
This bidirectional TVS diode uses planar silicon technology to achieve stable breakdown characteristics across -55 °C to +175 °C operating range, with temperature coefficient αT = 10−4/°C for both VBR and VCL. Its symmetrical avalanche structure enables equal clamping in both polarities, critical for AC-coupled signal lines and differential bus interfaces like RS-485 or CAN FD.
The device meets IEC 61000-4-2 level 4 (30 kV air/contact discharge) and IEC 61000-4-4 level 4 (4 kV), with validated surge capability up to 100 A (8/20 µs) and 8.1 A (10/1000 µs). Its low junction capacitance (<40 pF at 1 V, bidirectional type) ensures minimal signal distortion on high-speed data lines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRM) | 48 V - Maximum continuous reverse working voltage before conduction begins; defines circuit operating margin. |
| Breakdown Voltage (VBR) | 53.3–58.9 V @ IBR = 1 mA - Tight tolerance ensures predictable turn-on during overvoltage events. |
| Clamping Voltage (VCL) | 75.4 V @ IPP = 8.1 A (10/1000 µs) - Peak voltage seen by protected IC during worst-case surge. |
| Peak Pulse Power | 600 W (10/1000 µs), 4 kW (8/20 µs) - Sustains short-duration surges without thermal failure. |
| Leakage Current (IR) | 0.2 µA @ 25 °C, 1 µA @ 85 °C - Minimal loading on high-impedance sensor or reference circuits. |
| Dynamic Resistance (RD) | 1.03 Ω - Low impedance limits voltage overshoot during fast transients; improves clamping linearity. |
| Junction Temperature Range | −55 °C to +175 °C - Enables deployment in under-hood automotive, industrial motor drives, and outdoor telecom equipment. |
Pinout & Package
Package: SMA (DO-214AC), JEDEC registered outline, UL94 V0 compliant epoxy, matte tin-plated leads, MSL level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Marked Band) | Common terminal for bidirectional operation | Internally connected to both P-N junctions; serves as reference node for symmetrical clamping. |
| Anode 1 | First avalanche junction anode | Forms one half of bidirectional structure; conducts during negative transients. |
| Anode 2 | Second avalanche junction anode | Forms complementary half; conducts during positive transients - no external distinction; symmetric layout. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping symmetry | Equal VCL and IPP response for ± polarity surges - eliminates need for dual unidirectional devices on AC lines. |
| High-temperature stability | Rated Tj max = 175 °C with αT = 10−4/°C - maintains consistent clamping across extended thermal cycles in engine control units. |
| Low dynamic resistance | RD = 1.03 Ω - reduces voltage overshoot during fast-rising transients (e.g., EFT bursts), improving system-level immunity margin. |
| ESD robustness | 30 kV contact/air discharge per IEC 61000-4-2 - protects human-interface ports (buttons, touchscreens) without external shielding. |
| Industry-standard footprint | IPC-7531-compliant SMA land pattern - enables drop-in replacement and automated assembly with zero rework risk. |
Applications
| Industrial PLC Analog Input | Automotive Body Control Module |
|---|---|
Use Scenario: Protecting 0–10 V analog sensor inputs from field-wiring induced surges and ground loop transients in factory automation cabinets. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed at connector entry point, shunting energy before it reaches precision ADC front-end. Use Value: Clamps to 75.4 V while limiting leakage to 0.2 µA, preserving 16-bit measurement accuracy and preventing ADC saturation or latch-up. | Use Scenario: Safeguarding LIN bus transceivers and door module switches against load dump and jump-start induced spikes in 12 V vehicle networks. IC Role / Device Role / Timing Role: Primary surge suppressor on LIN signal line and switch sense inputs, operating continuously at 85 °C ambient. Use Value: Maintains <1 µA leakage at 85 °C and withstands 175 °C junction temperature, ensuring long-term reliability without derating. |
| RS-485 Data Line Protection | Smart Meter Communication Port |
Use Scenario: Shielding half-duplex RS-485 transceivers (e.g., MAX13487) from lightning-induced surges on utility meter backhaul links. IC Role / Device Role / Timing Role: Differential-line TVS pair (one per A/B line) with common cathode configuration, placed adjacent to connector. Use Value: 40 pF junction capacitance minimizes signal edge degradation at 10 Mbps; 4 kW (8/20 µs) rating handles multi-kA induced currents. | Use Scenario: Securing HAN (Home Area Network) interface (M-Bus or RF) against ESD during consumer handling and installation surges. IC Role / Device Role / Timing Role: Final-stage ESD guard on communication port pins, certified to IEC 61000-4-2 level 4 (30 kV). Use Value: Delivers 30 kV air/contact discharge protection without requiring additional RC filtering, reducing BOM count and PCB area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ48CA-TR | Same VRM (48 V), higher PPP (600 W → 600 W same, but SMB package offers 10% lower RD = 0.92 Ω) | SMB footprint requires larger PCB pad area; less suitable for space-constrained IoT nodes | Select when board layout allows SMB and lower clamping overshoot is prioritized over size. |
| P6SMB48CA-TR | Identical electrical specs but legacy SMB package; higher leakage (1 µA @ 25 °C vs. 0.2 µA) and no JEDEC DO-214AC registration | Not qualified to J-STD-002/JESD22-B102 E3; unsuitable for high-reliability automotive or medical designs | Acceptable only for cost-sensitive consumer applications where long-term leakage drift is non-critical. |
Compared with SMBJ48CA-TR and P6SMB48CA-TR, SMA6J48CA-TR delivers optimal balance of miniaturization (SMA), ultra-low leakage (0.2 µA), and full industrial qualification (MSL 1, UL94 V0, JESD201 class 2), making it preferred for compact, high-reliability embedded systems.
Availability
SMA6J48CA-TR is available at Aetrix Electronics and suitable for industrial PLC analog input protection, automotive body control modules, RS-485 data line hardening, and smart meter communication ports requiring stable component supply across extended temperature and surge stress conditions.
Supply support for SMA6J48CA-TR 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power management ICs, sensors, and discrete protection devices for industrial, automotive, and consumer markets.
The SMA6J series belongs to ST's high-reliability transient protection portfolio, engineered specifically for harsh-environment signal line protection where low leakage, high-temperature operation, and repeatable clamping performance are mandatory.
FAQ
What is the maximum clamping voltage for SMA6J48CA-TR under a 10/1000 µs surge?
The maximum clamping voltage is 75.4 V at 8.1 A peak pulse current (10/1000 µs waveform), measured at 25 °C ambient. This value increases linearly with junction temperature using αT = 10−4/°C, reaching ~79.2 V at Tj = 125 °C.
Is SMA6J48CA-TR suitable for protecting CAN FD bus lines?
Yes - its bidirectional structure, 40 pF junction capacitance at 1 V, and 75.4 V clamping voltage ensure minimal signal integrity impact on CAN FD (up to 5 Mbps) while providing 4 kV IEC 61000-4-4 and 30 kV ESD protection required for automotive body networks.
Does SMA6J48CA-TR require derating at elevated ambient temperatures?
Yes - peak pulse power must be derated above 25 °C per Figure 3 in DS5142. At 85 °C ambient, PPP drops to ~480 W (10/1000 µs); however, the device remains fully functional up to 175 °C junction temperature with no derating needed for leakage or clamping voltage stability.
How does the dynamic resistance (RD = 1.03 Ω) affect system-level surge protection?
Dynamic resistance determines voltage overshoot during fast transients: ΔV = RD × ΔI. With RD = 1.03 Ω, a 5 A surge edge induces only ~5.15 V overshoot beyond VBR, enabling tighter clamping margins and improved immunity against sub-microsecond EFT bursts in industrial environments.
SMA6J48CA-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-214AC, SMA
- Series:
- SMA6J, TRANSIL™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 48V
- Voltage - Breakdown (Min):
- 53.3V
- Voltage - Clamping (Max) @ Ipp:
- 88.4V
- Current - Peak Pulse (10/1000µs):
- 40A (8/20µs)
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA6J48CA-TR FAQ
1.How can I place an order for SMA6J48CA-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA6J48CA-TR 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 SMA6J48CA-TR reliable?
The price and inventory of SMA6J48CA-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA6J48CA-TR is usually 5 days.
3.What payment methods are accepted for SMA6J48CA-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA6J48CA-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA6J48CA-TR?
SMA6J48CA-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA6J48CA-TR 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 SMA6J48CA-TR?
For technical support, including SMA6J48CA-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA6J48CA-TR requirements.
6.How does Aetrix verify that SMA6J48CA-TR is sourced from the original manufacturer or authorized distributors?
All SMA6J48CA-TR 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 SMA6J48CA-TR meets industry standards.
7.What is the process for return or replacement of SMA6J48CA-TR?
All SMA6J48CA-TR units undergo pre-shipment inspection (PSI). If there is an issue with SMA6J48CA-TR, 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 SMA6J48CA-TR part is unused and in its original packaging.
Return procedure for SMA6J48CA-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA6J48CA-TR 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
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…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
