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Vishay General Semiconductor - Diodes Division SMAJ48CHE3/5A
- Part No.:
- SMAJ48CHE3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ48CHE3/5A.pdf
- Description:
- TVS DIODE 48VWM 85.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,093
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Product details
Overview
SMAJ48CHE3/5A from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for robust overvoltage protection on signal and power lines. It features a 48 V stand-off voltage (VWM), 53.3–65.1 V breakdown range (VBR at 1 mA), 85.5 V maximum clamping voltage (VC) at 4.7 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - suitable for automotive-grade ESD and surge protection in sensor interfaces and power rails.
For engineers reviewing the SMAJ48CHE3/5A datasheet, SMAJ48CHE3/5A pinout, SMAJ48CHE3/5A application, or SMAJ48CHE3/5A equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance values, junction capacitance behavior, and direct alternative part comparisons to support circuit-level transient protection design and BOM validation.
Technical Context
This bi-directional TVS operates symmetrically in both polarities, with no polarity marking on the device body. Its glass-passivated junction ensures stable VBR tolerance and low leakage (<1 µA at 48 V), while the 120 °C/W junction-to-ambient thermal resistance requires careful PCB copper pad sizing (0.2 × 0.2 inch per terminal) to sustain repetitive surges.
The device meets MSL Level 1 per J-STD-020, supports 260 °C solder reflow, and is qualified to AEC-Q101 for automotive reliability. Clamping performance is specified at 4.7 A IPPM, delivering 85.5 V VC - critical for protecting 48 V nominal systems against ISO 7637-2 Pulse 1/2a/5a transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VWM) | 48 V - maximum continuous reverse working voltage before significant conduction begins |
| Breakdown Voltage (VBR) | 53.3–65.1 V at 1 mA - defines the onset of avalanche clamping; tight distribution enables predictable protection threshold |
| Clamping Voltage (VC) | 85.5 V at 4.7 A (10/1000 µs) - peak voltage seen by protected circuit during rated surge event |
| Peak Pulse Power (PPPM) | 400 W - sustainable single-pulse energy handling capability under standard test conditions |
| Junction-to-Ambient RθJA | 120 °C/W - dictates required PCB copper area (0.2 × 0.2″ pads) to limit temperature rise during surge dissipation |
| Operating Temperature | −55 °C to +150 °C - supports under-hood automotive and industrial environments without derating |
| AEC-Q101 Qualified | Yes - validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces |
Pinout & Package
DO-214AC (SMA) surface-mount package: molded epoxy case with matte tin-plated leads, UL 94 V-0 rated, 0.208″ × 0.157″ footprint, cathode band omitted for bi-directional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional avalanche terminals | No polarity marking; either terminal serves as anode or cathode depending on transient polarity - enables single-device bidirectional protection |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Enables single-component protection of AC-coupled or floating signal lines without polarity concerns |
| AEC-Q101 qualification | Validates reliability for automotive applications including powertrain, chassis, and infotainment systems |
| 400 W peak pulse rating | Supports IEC 61000-4-5 Level 3 (1 kV/2 Ω) and ISO 7637-2 Pulse 5a (75 V/12 Ω) compliance with margin |
| Low leakage & tight VBR | <1 µA at 48 V ensures minimal standby power loss and precise trigger threshold in battery-sensitive designs |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow without baking - simplifies SMT manufacturing flow |
Applications
| Automotive Sensor Interface | Industrial CAN Bus Protection |
|---|---|
|
Use Scenario: Protecting LIN/CAN transceiver inputs and analog sensor outputs (e.g., pressure, temperature) from load dump and inductive switching transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bi-directional voltage clamp placed between signal line and ground, responding within <1 ns to divert surge energy away from sensitive IC pins. Use Value: Maintains signal integrity below 85.5 V during 4.7 A transients, preventing latch-up or damage to 5 V or 3.3 V interface ICs in AEC-Q100-compliant modules. |
Use Scenario: Safeguarding RS-485/CAN FD physical layer transceivers in factory automation controllers exposed to motor drive noise and lightning-induced surges. IC Role / Device Role / Timing Role: Low-capacitance (≈100 pF at 0 V) bi-directional shunt element across differential bus lines (CAN_H/CAN_L) to clamp common-mode overvoltages. Use Value: Limits transient voltage to ≤85.5 V while adding <0.5 pF parasitic capacitance per line - preserving signal edge rate and bit error rate in 5 Mbps CAN FD links. |
| 48 V DC Power Rail Protection | USB Type-C Port ESD Clamp |
|
Use Scenario: Secondary overvoltage protection downstream of DC-DC converters in 48 V mild-hybrid automotive architectures and telecom rectifier outputs. IC Role / Device Role / Timing Role: Standby-mode TVS connected between 48 V rail and chassis ground, absorbing load-dump spikes up to 60 V with minimal quiescent current. Use Value: Withstands 400 W pulses without degradation and maintains <1 µA leakage at 48 V - avoids unnecessary drain on battery-backed systems. |
Use Scenario: Board-level ESD protection for USB Type-C receptacles in portable medical devices and ruggedized tablets where space constraints favor SMA footprint. IC Role / Device Role / Timing Role: Bi-directional transient suppressor placed on VBUS, CC, and SBU lines to clamp ±15 kV contact discharge per IEC 61000-4-2. Use Value: Delivers sub-100 ns response and 85.5 V clamping at 4.7 A - sufficient to protect USB PD controllers rated for 20 V operation without crowbar triggering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ48AHE3/5A | Uni-directional variant; includes cathode band marking and forward voltage drop (~3.5 V at 25 A) | Requires polarity-aware layout; unsuitable for AC or floating lines without series diode or dual placement | Select only when protecting unidirectional DC rails where forward conduction path must be preserved |
| SMBJ48CAHE3/5A | Same VWM/VC but in DO-214AA (SMB) package; 600 W PPPM; 10% larger footprint | Higher surge capacity suits higher-energy transients (e.g., ISO 7637-2 Pulse 5b); requires PCB redesign | Choose when system-level testing reveals 400 W insufficient and board space allows SMB footprint |
Compared with SMAJ48CHE3/5A, the uni-directional SMAJ48AHE3/5A adds polarity dependency but enables forward-biased current paths, while SMBJ48CAHE3/5A trades compactness for 50% higher surge rating - neither is pin-compatible, but both serve adjacent protection tiers in automotive and industrial designs.
Availability
SMAJ48CHE3/5A is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor nodes, and 48 V power distribution systems requiring stable component supply, AEC-Q101 traceability, and long-term lifecycle continuity.
Supply support for SMAJ48CHE3/5A 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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for automotive, industrial, and computing markets.
The SMAJ series targets high-volume transient protection in space-constrained applications, with AEC-Q101 qualification and optimized thermal performance for under-hood and harsh-environment deployment.
FAQ
What does the "HE3" suffix indicate in SMAJ48CHE3/5A?
The HE3 suffix denotes high-reliability, automotive-grade qualification per AEC-Q101, RoHS compliance, and JESD201 Class 2 whisker resistance. Unlike commercial-grade E3 variants, SMAJ48CHE3/5A undergoes extended stress testing for temperature cycling, humidity, and surge endurance - making it suitable for safety-critical automotive subsystems where field failure is unacceptable.
Is SMAJ48CHE3/5A bi-directional or uni-directional?
SMAJ48CHE3/5A is explicitly bi-directional, as confirmed by its "CA" designation in the full family name SMAJ48CA and absence of cathode band marking. It clamps symmetrically for both positive and negative transients, enabling single-device protection of AC signals, differential buses, or floating grounds without polarity orientation concerns during assembly.
What is the maximum clamping voltage for SMAJ48CHE3/5A under surge conditions?
The maximum clamping voltage (VC) for SMAJ48CHE3/5A is 85.5 V at 4.7 A peak pulse current with a 10/1000 µs waveform. This value is measured per Fig. 1 and Fig. 3 in Vishay document 88390 and represents the worst-case voltage imposed on protected circuitry during standardized surge events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Does SMAJ48CHE3/5A meet automotive reliability standards?
Yes, SMAJ48CHE3/5A is AEC-Q101 qualified, as stated in the "ORDERING INFORMATION" section (Note 1) and "MECHANICAL DATA" of Vishay document 88390. This certification covers stress tests including high-temperature operating life, temperature cycling, and surge robustness - validating its use in engine control units, ADAS cameras, and body control modules per automotive OEM requirements.
How does the DO-214AC (SMA) package affect thermal performance of SMAJ48CHE3/5A?
The DO-214AC (SMA) package gives SMAJ48CHE3/5A a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W, which requires mounting on minimum 0.2 × 0.2 inch copper pads per terminal to achieve rated 400 W pulse power. Without adequate copper area, thermal impedance rises, causing junction temperature to exceed 150 °C during repeated surges - potentially degrading clamping consistency or lifetime.
SMAJ48CHE3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 48V
- Voltage - Breakdown (Min):
- 53.3V
- Voltage - Clamping (Max) @ Ipp:
- 85.5V
- Current - Peak Pulse (10/1000µs):
- 4.7A
- Power - Peak Pulse:
- 400W
- 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-214AC (SMA)
SMAJ48CHE3/5A FAQ
1.How can I place an order for SMAJ48CHE3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ48CHE3/5A 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 SMAJ48CHE3/5A reliable?
The price and inventory of SMAJ48CHE3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ48CHE3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ48CHE3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ48CHE3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ48CHE3/5A?
SMAJ48CHE3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ48CHE3/5A 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 SMAJ48CHE3/5A?
For technical support, including SMAJ48CHE3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ48CHE3/5A requirements.
6.How does Aetrix verify that SMAJ48CHE3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ48CHE3/5A 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 SMAJ48CHE3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ48CHE3/5A?
All SMAJ48CHE3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ48CHE3/5A, 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 SMAJ48CHE3/5A part is unused and in its original packaging.
Return procedure for SMAJ48CHE3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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