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Vishay General Semiconductor - Diodes Division SA48CAHE3/54
- Part No.:
- SA48CAHE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA48CAHE3/54.pdf
- Description:
- TVS DIODE 48VWM 77.4VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,748
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Product details
Overview
SA48CAHE3/54 from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode in DO-15 package, designed for clamping voltage transients on signal or power lines. It features 48 V standoff voltage (VWM), 53.3–58.9 V breakdown voltage (VBR), 500 W peak pulse power (10/1000 μs), 77.4 V max clamping voltage at 6.5 A, and AEC-Q101 qualification for automotive use.
For engineers reviewing the SA48CAHE3/54 datasheet, SA48CAHE3/54 pinout, SA48CAHE3/54 application, or SA48CAHE3/54 equivalent, key selection criteria include bidirectional clamping capability, DO-15 mechanical compatibility, 175 °C max junction temperature, low incremental surge resistance, and compliance with IEC 61000-4-2/4-4/4-5 transient immunity standards.
Technical Context
The SA48CAHE3/54 operates as a silicon avalanche diode with glass-passivated junction, enabling symmetric clamping in both polarities without polarity marking. Its bidirectional architecture ensures identical VBR, IPPM, and VC characteristics in forward and reverse directions - critical for protecting AC-coupled or floating signal paths.
It delivers 500 W peak pulse power under 10/1000 μs waveform with 0.01 % duty cycle, and maintains stable clamping performance across -55 °C to +175 °C operating range. The device exhibits 56 mV/°C temperature coefficient of VBR, supporting predictable thermal drift in high-temperature environments such as engine control units.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - Maximum continuous reverse voltage before clamping begins; defines safe operating window for protected circuitry. |
| VBR (min/max) | 53.3 V / 58.9 V at 1 mA - Ensures reliable avalanche initiation within tight tolerance band for consistent protection threshold. |
| VC @ IPPM | 77.4 V at 6.5 A - Clamped voltage during 10/1000 μs surge; determines maximum stress imposed on downstream components. |
| PPPM | 500 W - Peak surge energy absorption capacity; validates suitability for ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 line surges. |
| TJ max | +175 °C - Enables deployment in under-hood automotive modules and industrial motor drives without derating. |
| AEC-Q101 | Qualified - Confirms reliability for automotive electronics per stress test requirements including HTGB, HTRB, and TCT. |
Pinout & Package
Package: DO-15 (DO-204AC), axial leaded, epoxy molded, RoHS-compliant, matte tin-plated leads solderable per J-STD-002. Bidirectional construction means no cathode marking; both terminals are electrically symmetrical.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias | Terminal where conventional current flows into device during positive half-cycle clamping. |
| Cathode | Current exit point in forward bias | Terminal where conventional current exits during positive half-cycle; functionally identical to anode in bidirectional mode. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated chip junction | Enables stable avalanche behavior over lifetime and prevents moisture-induced degradation in harsh environments. |
| 500 W peak pulse power (10/1000 μs) | Supports robust protection against load dump and inductive switching events in 12 V/24 V automotive systems. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (<1 ns response), improving protection margin for sensitive ICs. |
| AEC-Q101 qualified | Validates reliability for automotive ECUs, ADAS sensors, and body control modules requiring zero-failure field performance. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting LIN bus transceivers and microcontroller I/O pins from battery load dump and alternator ripple in vehicle door modules. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between power rail and ground, absorbing ±100 V transients without polarity concern. Use Value: Prevents latch-up or gate oxide damage in 3.3 V/5 V logic by limiting rail voltage to ≤77.4 V during 6.5 A surge events. | Use Scenario: Safeguarding analog outputs of pressure/temperature sensors connected to PLC analog input cards in factory automation. IC Role / Device Role / Timing Role: Signal-line TVS mounted directly at connector interface to shunt ESD and switching noise before reaching precision ADC front-end. Use Value: Maintains <10 pF capacitance at 0 V bias (per Fig. 6), avoiding signal integrity degradation in 10 kHz sensor bandwidth applications. |
| Telecom DC Power Feeding | Consumer USB Port ESD Protection |
Use Scenario: Securing PoE-powered Ethernet switches against induced surges on 48 V DC feeding lines due to nearby lightning strikes. IC Role / Device Role / Timing Role: Primary overvoltage clamp on DC input stage, coordinated with upstream fuse and secondary filtering. Use Value: Withstands repeated 500 W pulses at 0.01 % duty cycle, enabling long-term operation without parameter drift or failure. | Use Scenario: Adding secondary-level ESD hardening to USB 2.0 data lines (D+/D−) in set-top boxes exposed to human-body-model discharges. IC Role / Device Role / Timing Role: Low-capacitance bidirectional suppressor placed after common-mode choke to handle ±8 kV contact discharge per IEC 61000-4-2. Use Value: Achieves sub-1 ns response time and clamps to <15 V during 30 A ESD event, preserving USB eye diagram integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ48A-E3/52 | Unidirectional; same VWM/VBR/VC, but requires polarity-aware layout and lacks AEC-Q101 qualification. | Restricted to DC-biased circuits where polarity is fixed; unsuitable for AC or floating interfaces. | Select SMAJ48A-E3/52 only when cost sensitivity outweighs automotive qualification and bidirectional flexibility. |
| SMCJ48CA | Same bidirectional functionality but in larger SMC (DO-214AB) package; higher IPPM (13.9 A) and PPPM (1500 W). | Better suited for high-energy surge zones (e.g., main power input), but occupies 3× PCB area vs. DO-15. | Choose SMCJ48CA when system-level surge testing exceeds 500 W requirements or when thermal dissipation demands larger footprint. |
Compared with SMAJ48A-E3/52 and SMCJ48CA, SA48CAHE3/54 uniquely balances AEC-Q101 compliance, DO-15 space efficiency, and true bidirectional symmetry - making it optimal for compact, automotive-grade signal-line protection where polarity cannot be assumed.
Availability
SA48CAHE3/54 is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, telecom power feeding, and consumer USB port protection requiring stable component supply and full traceability.
Supply support for SA48CAHE3/54 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 passive components with emphasis on reliability and automotive-grade qualification.
The SAxxCA series is part of Vishay's TRANSZORB® TVS family, engineered specifically for high-reliability transient suppression in automotive, industrial, and telecom infrastructure where bidirectional clamping and AEC-Q101 validation are mandatory.
FAQ
What is the clamping voltage of SA48CAHE3/54 at its rated peak pulse current?
The SA48CAHE3/54 has a maximum clamping voltage (VC) of 77.4 V at 6.5 A peak pulse current (IPPM) under 10/1000 μs waveform conditions. This value defines the upper voltage limit imposed on protected circuitry during surge events and is measured per ANSI/IEEE C62.35 standard. The SA48CAHE3/54 maintains this clamping performance across its full operating temperature range.
Is SA48CAHE3/54 suitable for automotive applications?
Yes, SA48CAHE3/54 is AEC-Q101 qualified and explicitly rated for automotive use. Its construction includes glass-passivated junction, matte tin-plated leads compliant with J-STD-002, and operation up to +175 °C junction temperature - all validated per AEC stress test requirements. The SA48CAHE3/54 appears in Vishay's automotive-grade ordering matrix with HE3 suffix denoting qualification.
How does the bidirectional design of SA48CAHE3/54 affect its PCB layout?
The SA48CAHE3/54 has no polarity marking and identical electrical behavior in both directions, eliminating orientation constraints during placement. Unlike unidirectional TVS diodes, it can be installed without regard to anode/cathode alignment - simplifying assembly and reducing risk of misorientation in high-volume manufacturing. This symmetry also enables reuse across AC-coupled or differential signal paths.
What is the standoff voltage rating of SA48CAHE3/54 and how does it relate to system operating voltage?
The SA48CAHE3/54 has a reverse standoff voltage (VWM) of 48 V, meaning it remains non-conductive below this DC or RMS voltage level. For reliable operation, system nominal voltage must stay below VWM with margin - e.g., it is appropriate for 36 V nominal automotive systems (with 48 V transients) or 48 V telecom DC feeds. Exceeding VWM risks leakage current increase and premature clamping.
Does SA48CAHE3/54 meet RoHS and lead-free soldering requirements?
Yes, SA48CAHE3/54 carries the HE3 suffix indicating RoHS-compliant construction and AEC-Q101 qualification. Its matte tin-plated leads are solderable per J-STD-002 and withstand solder dip at 275 °C for 10 seconds per JESD 22-B106. The molding compound meets UL 94 V-0 flammability rating, and the device complies with JEDEC JESD201 whisker testing Class 2.
SA48CAHE3/54 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- TransZorb®
- 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:
- 77.4V
- Current - Peak Pulse (10/1000µs):
- 6.5A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
SA48CAHE3/54 FAQ
1.How can I place an order for SA48CAHE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA48CAHE3/54 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 SA48CAHE3/54 reliable?
The price and inventory of SA48CAHE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA48CAHE3/54 is usually 5 days.
3.What payment methods are accepted for SA48CAHE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA48CAHE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA48CAHE3/54?
SA48CAHE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA48CAHE3/54 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 SA48CAHE3/54?
For technical support, including SA48CAHE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA48CAHE3/54 requirements.
6.How does Aetrix verify that SA48CAHE3/54 is sourced from the original manufacturer or authorized distributors?
All SA48CAHE3/54 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 SA48CAHE3/54 meets industry standards.
7.What is the process for return or replacement of SA48CAHE3/54?
All SA48CAHE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA48CAHE3/54, 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 SA48CAHE3/54 part is unused and in its original packaging.
Return procedure for SA48CAHE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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