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Vishay General Semiconductor - Diodes Division SMAJ54C-E3/5A
- Part No.:
- SMAJ54C-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ54C-E3/5A.pdf
- Description:
- TVS DIODE 54VWM 96.3VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,407
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Product details
Overview
SMAJ54C-E3/5A from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for clamping voltage transients on signal and power lines. It features a 54 V stand-off voltage (VWM), 96.3 V maximum clamping voltage (VC) at 4.2 A peak pulse current, 400 W peak pulse power (10/1000 µs), and operates from −55 °C to +150 °C - used for protecting MOSFETs, sensor interfaces, and automotive control units against ESD and inductive switching surges.
For engineers reviewing the SMAJ54C-E3/5A datasheet, SMAJ54C-E3/5A pinout, SMAJ54C-E3/5A application, or SMAJ54C-E3/5A equivalent, this page delivers verified electrical parameters, bi-directional terminal behavior, thermal resistance data (RθJA = 120 °C/W), RoHS-compliant matte tin plating, and J-STD-020 MSL Level 1 reflow compatibility - all critical for board-level surge protection design and BOM validation.
Technical Context
This bi-directional TVS diode uses a glass-passivated silicon junction to achieve sub-nanosecond response time and low incremental surge resistance. Its symmetrical breakdown characteristic (VBR min/max = 60.0 V / 73.3 V at 1 mA) ensures identical clamping in both polarities, with no polarity marking required on the SMA package.
Rated for 400 W peak pulse power below 78 V (derated to 300 W above), it sustains repetitive transients at 0.01 % duty cycle when mounted on 5.0 × 5.0 mm copper pads. Thermal performance is defined by RθJA = 120 °C/W and RθJL = 30 °C/W, supporting reliable operation up to TJ = 150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 54 V - maximum continuous reverse voltage before clamping begins; defines operating margin for 48 V nominal systems. |
| VC (Clamping Voltage) | 96.3 V at IPPM = 4.2 A - limits transient voltage seen by downstream ICs during 10/1000 µs surge events. |
| PPPM (Peak Pulse Power) | 400 W - energy-handling capability under standard 10/1000 µs waveform; sufficient for IEC 61000-4-5 Level 3 (1 kV/2 Ω) testing. |
| IPPM (Peak Pulse Current) | 4.2 A - maximum non-repetitive surge current the device safely clamps without degradation. |
| TJ Range | −55 °C to +150 °C - supports under-hood automotive, industrial motor drives, and outdoor telecom equipment. |
| RθJA | 120 °C/W - thermal resistance from junction to ambient; requires minimum 5.0 × 5.0 mm copper pad area for rated power dissipation. |
| Leakage (ID) | 1.0 µA at VWM - negligible standby current; avoids loading of high-impedance sensor or reference lines. |
Pinout & Package
DO-214AC (SMA) surface-mount package: low-profile, rectangular body with coplanar matte tin-plated leads; meets UL 94 V-0 flammability rating and J-STD-020 MSL Level 1 (peak reflow 260 °C). Bi-directional construction means no cathode band; terminals are symmetrical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional transient conduction path | Either terminal serves as anode or cathode depending on transient polarity; no marking required. |
| Case (body) | Non-electrical mechanical interface | Insulated plastic housing; no thermal or electrical connection to internal die - heat transfer occurs only via leads. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance (±10 %) and long-term reliability under humidity and thermal cycling. |
| 400 W peak pulse power (≤78 V) | Supports robust protection against lightning-induced surges and relay coil flyback in 24–48 V systems. |
| MSL Level 1 rating | Enables standard SMT reflow without baking; compatible with automated placement and lead-free assembly. |
| RoHS-compliant matte tin plating | Meets J-STD-002 solderability requirements and JESD22-B102 whisker resistance (Class 1A). |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (<1 ns rise time), improving protection margin. |
Applications
| Automotive Body Control Module | Industrial PLC Analog Input Protection |
|---|---|
Use Scenario: Protecting LIN bus transceivers and microcontroller GPIOs from load dump and alternator ripple in vehicle door modules. IC Role / Device Role / Timing Role: Bi-directional voltage clamp placed across supply rail and signal line to limit transients to <96.3 V during 12 V system faults. Use Value: Prevents latch-up or gate oxide damage in 3.3 V/5 V logic ICs while maintaining signal integrity during normal operation due to 1.0 µA leakage. |
Use Scenario: Safeguarding 4–20 mA current loop inputs in programmable logic controllers exposed to field wiring surges. IC Role / Device Role / Timing Role: Transient shunt connected between input terminals and ground to divert >4.2 A surge current away from precision op-amps and ADC front-ends. Use Value: Enables compliance with IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) without adding series impedance or affecting loop accuracy. |
| Telecom Remote Radio Unit | Consumer Appliance Motor Driver Interface |
Use Scenario: Shielding RS-485 transceivers and power management ICs in outdoor base station radios from induced lightning surges on backhaul lines. IC Role / Device Role / Timing Role: Bi-directional TVS placed differential-mode across data lines and common-mode to chassis ground to suppress both modes simultaneously. Use Value: Maintains signal integrity up to 10 Mbps while clamping 10/1000 µs surges to <96.3 V - critical for maintaining link uptime in harsh RF environments. |
Use Scenario: Protecting gate drivers and MCU pins in washing machine motor control boards from inductive kickback during BLDC commutation. IC Role / Device Role / Timing Role: Clamp placed across half-bridge high-side/low-side driver supply rails to absorb 400 W flyback energy during MOSFET turn-off. Use Value: Eliminates need for snubbers or larger bulk capacitors; reduces PCB area and cost while meeting IEC 60335-1 surge immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ54CA-E3/5A | Same electrical specs and DO-214AC package; CA suffix denotes same bi-directional construction per Vishay documentation. | No functional difference - CA and C suffixes are interchangeable per Vishay's ordering table and device marking code mapping. | Select SMAJ54CA-E3/5A if legacy BOM references CA; otherwise SMAJ54C-E3/5A is functionally identical and fully substitutable. |
| SMBJ54C-E3/52 | Higher PPPM = 600 W, larger SMB (DO-214AA) package, RθJA = 80 °C/W; otherwise matches VWM, VC, and bi-directionality. | Better suited for higher-energy surges (e.g., IEC 61000-4-5 Level 4); requires larger PCB footprint and different pad layout. | Choose SMBJ54C-E3/52 only when 400 W is insufficient; SMAJ54C-E3/5A remains optimal for space-constrained 48 V systems where 400 W meets spec. |
Compared with SMAJ54CA-E3/5A (identical function) and SMBJ54C-E3/52 (higher power, larger footprint), SMAJ54C-E3/5A delivers the optimal balance of surge rating, miniaturization, and thermal performance for compact 48 V industrial and automotive electronics - requiring no layout change versus CA variants but offering lower profile than SMBJ alternatives.
Availability
SMAJ54C-E3/5A is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC analog inputs, telecom remote radio units, and consumer appliance motor control requiring stable component supply and full traceability.
Supply support for SMAJ54C-E3/5A 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 diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, power efficiency, and AEC-Q qualified automotive solutions.
The SMAJ series was engineered specifically for surface-mount transient suppression in space-constrained, high-reliability applications - delivering consistent clamping performance across −55 °C to +150 °C with minimal leakage and industry-leading surge robustness.
FAQ
What is the clamping voltage of SMAJ54C-E3/5A under a 10/1000 µs surge?
The SMAJ54C-E3/5A clamps to a maximum of 96.3 V when subjected to its rated peak pulse current of 4.2 A using the standard 10/1000 µs waveform. This value is measured at TA = 25 °C with the device mounted on 5.0 × 5.0 mm copper pads per Vishay Document 88390. The clamping voltage directly determines the maximum stress imposed on protected circuitry during transient events.
Is SMAJ54C-E3/5A unidirectional or bidirectional?
SMAJ54C-E3/5A is a bi-directional transient voltage suppressor, as confirmed by the "C" suffix in its part number and explicit listing under "DEVICES FOR BI-DIRECTION APPLICATIONS" in Vishay Document 88390. It exhibits symmetrical breakdown behavior - identical VBR, VC, and IPPM characteristics in both polarities - and carries no polarity marking on the DO-214AC package.
What does the "E3/5A" suffix mean in SMAJ54C-E3/5A?
The "E3" suffix indicates RoHS-compliant, commercial-grade construction with matte tin plating meeting JESD22-B102 solderability and JESD201 Class 1A whisker resistance. The "/5A" denotes packaging in 13-inch diameter plastic tape and reel, with a base quantity of 7500 units - distinct from "/61" (7-inch reel, 1800 units) per Vishay's Ordering Information table.
Can SMAJ54C-E3/5A replace SMAJ54A-E3/5A in a design?
No - SMAJ54C-E3/5A and SMAJ54A-E3/5A are not interchangeable. SMAJ54A-E3/5A is unidirectional (VF = 3.5 V at 25 A), has lower VC = 87.1 V, and requires cathode orientation during placement. SMAJ54C-E3/5A is bi-directional with no polarity marking and higher VC = 96.3 V. Substitution would compromise protection symmetry and violate layout assumptions.
What is the thermal resistance of SMAJ54C-E3/5A, and how does it affect layout?
SMAJ54C-E3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W and junction-to-lead (RθJL) of 30 °C/W. To achieve rated 400 W pulse power, Vishay specifies mounting on minimum 0.2 × 0.2 inch (5.0 × 5.0 mm) copper pads per terminal. Reducing pad area increases junction temperature, derating pulse capability per Figure 2 in Document 88390.
SMAJ54C-E3/5A 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):
- 54V
- Voltage - Breakdown (Min):
- 60V
- Voltage - Clamping (Max) @ Ipp:
- 96.3V
- Current - Peak Pulse (10/1000µs):
- 4.2A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ54C-E3/5A FAQ
1.How can I place an order for SMAJ54C-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ54C-E3/5A 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 SMAJ54C-E3/5A reliable?
The price and inventory of SMAJ54C-E3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ54C-E3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ54C-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ54C-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ54C-E3/5A?
SMAJ54C-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ54C-E3/5A 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 SMAJ54C-E3/5A?
For technical support, including SMAJ54C-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ54C-E3/5A requirements.
6.How does Aetrix verify that SMAJ54C-E3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ54C-E3/5A 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 SMAJ54C-E3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ54C-E3/5A?
All SMAJ54C-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ54C-E3/5A, 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 SMAJ54C-E3/5A part is unused and in its original packaging.
Return procedure for SMAJ54C-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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