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Vishay General Semiconductor - Diodes Division SA7.5C-E3/54
- Part No.:
- SA7.5C-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA7.5C-E3/54.pdf
- Description:
- TVS DIODE 7.5VWM 14.3VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,005
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Product details
Overview
SA7.5C-E3/54 from Vishay General Semiconductor is a bi-directional Transient Voltage Suppressor (TVS) diode in DO-204AC (DO-15) package, designed for clamping voltage transients on signal or power lines. It features a 7.5 V stand-off voltage (VWM), 8.33–9.21 V breakdown voltage (VBR) at 1.0 mA, 38.8 A peak pulse current (IPPM), 12.9 V maximum clamping voltage (VC) at IPPM, and 500 W peak pulse power (10/1000 μs). It protects sensitive ICs and MOSFETs in automotive sensor interfaces.
For engineers reviewing the SA7.5C-E3/54 datasheet, SA7.5C-E3/54 pinout, SA7.5C-E3/54 application, or SA7.5C-E3/54 equivalent, key selection criteria include bi-directional clamping capability, 12.9 V clamping at 38.8 A, DO-204AC mechanical compatibility, AEC-Q101 qualification status, and 7.5 V stand-off rating for low-voltage signal line protection.
Technical Context
This device operates as a bi-directional avalanche diode, symmetrically clamping transient overvoltages in both polarities without polarity marking. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<50 μA at VWM), while its 175 °C max junction temperature supports under-hood automotive environments.
The SA7.5C-E3/54 delivers 500 W peak pulse power per 10/1000 μs waveform with 0.01% duty cycle, and exhibits 7 %/°C temperature coefficient of VBR, enabling predictable voltage shift across operating temperature ranges. It is rated for 3.0 W steady-state power dissipation on infinite heatsink at 75 °C lead temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - Maximum continuous reverse working voltage before clamping begins |
| VBR (min/max) | 8.33 V / 9.21 V at 1.0 mA - Ensures reliable turn-on within tight tolerance for precise overvoltage thresholding |
| VC @ IPPM | 12.9 V at 38.8 A - Limits downstream voltage stress during 10/1000 μs surge events |
| IPPM | 38.8 A - Peak surge current handling capacity under standard test waveform |
| PPPM | 500 W - Transient energy absorption capability for inductive switching or ESD events |
| TJ max | 175 °C - Enables operation in high-temperature automotive and industrial ambient conditions |
| Leakage ID | <50 μA at 7.5 V - Minimizes standby power loss and avoids false triggering in low-power circuits |
Pinout & Package
Package: DO-204AC (DO-15), axial-leaded, molded epoxy case meeting UL 94 V-0; matte tin-plated leads, RoHS-compliant (E3 suffix), AEC-Q101 qualified (HE3 variant exists but SA7.5C-E3/54 is commercial-grade E3).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; clamping node in negative transients | Connected to protected line; no polarity marking on bi-directional devices |
| Cathode | Current exit point in forward bias; clamping node in positive transients | Connected to protected line; identical electrical role to anode due to symmetry |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| Glass passivated junction | Ensures long-term stability of breakdown voltage and low leakage under thermal cycling |
| AEC-Q101 qualified variant available | Supports automotive-grade reliability requirements; SA7.5C-E3/54 is E3 (commercial), HE3 is AEC-Q101 |
| 500 W peak pulse power (10/1000 μs) | Withstands repetitive load dump or inductive kick events common in 12 V vehicle systems |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage overshoot during clamping, reducing stress on downstream ICs |
Applications
| Automotive Sensor Interface | Industrial CAN Bus Line Protection |
|---|---|
Use Scenario: Protecting analog output lines of pressure or temperature sensors exposed to load dump and ISO 7637-2 pulses in engine control modules. IC Role / Device Role / Timing Role: Bi-directional TVS clamping element placed between sensor output and microcontroller ADC input. Use Value: Limits transient voltage to ≤12.9 V, preserving ADC integrity and preventing latch-up in 3.3 V or 5 V microcontrollers. | Use Scenario: Safeguarding CAN_H and CAN_L differential pair against ESD and fast transients in factory automation nodes. IC Role / Device Role / Timing Role: Standoff-clamping protector mounted directly at connector entry, symmetrically referenced to ground. Use Value: Maintains signal integrity by clamping ±12.9 V surges without adding capacitance that degrades 1 Mbps CAN timing margins. |
| Consumer USB Port ESD Protection | Telecom DSL Line Surge Suppression |
Use Scenario: Secondary-level ESD protection on VBUS and D+/D− lines of USB 2.0 ports in set-top boxes and docking stations. IC Role / Device Role / Timing Role: Low-capacitance bi-directional clamp shunting transients to ground before USB transceiver inputs. Use Value: Provides 500 W surge immunity while maintaining <10 pF parasitic capacitance (per datasheet Fig. 6), avoiding signal rise-time degradation. | Use Scenario: Primary surge suppression on twisted-pair DSL lines subjected to lightning-induced surges in outdoor cabinets. IC Role / Device Role / Timing Role: First-stage protector bridging line-to-ground, coordinated with gas discharge tube (GDT) upstream. Use Value: Absorbs up to 38.8 A peak current (10/1000 μs), limiting let-through voltage to protect downstream hybrid couplers and line drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ7.5CA | Same VWM (7.5 V), slightly higher VC (13.4 V), same DO-214AC package (SMA), lower IPPM (32.5 A) | Surface-mount alternative; requires PCB rework; not axial-leaded | Select SMAJ7.5CA only when board space constraints mandate SMD packaging and 13.4 V clamping is acceptable. |
| 1.5KE7.5CA | Same VWM (7.5 V), higher PPPM (1500 W), larger DO-201AD package, higher VC (12.9 V same, but at 123 A) | Higher-power legacy through-hole option; longer lead inductance may reduce high-frequency response | Choose 1.5KE7.5CA where surge energy exceeds 500 W or legacy DO-201AD footprint is fixed. |
Compared with SMAJ7.5CA and 1.5KE7.5CA, SA7.5C-E3/54 offers optimal balance of axial-leaded DO-204AC form factor, 500 W capability, and 12.9 V clamping-making it ideal for cost-sensitive, medium-energy automotive and industrial signal-line protection where through-hole assembly is preferred.
Availability
SA7.5C-E3/54 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial CAN bus nodes, consumer USB port protection, and telecom DSL line surge suppression requiring stable component supply and RoHS-compliant sourcing.
Supply support for SA7.5C-E3/54 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 protection devices with emphasis on reliability and automotive qualification.
The SAxxC series is part of Vishay's TRANSZORB® TVS family, engineered specifically for robust, bidirectional transient suppression in harsh environments including automotive, industrial, and telecom infrastructure.
FAQ
What is the polarity configuration of SA7.5C-E3/54?
The SA7.5C-E3/54 is a bi-directional TVS diode, meaning it provides symmetrical clamping for both positive and negative transients. Unlike uni-directional variants (e.g., SA7.5A), it has no cathode band marking and functions identically in either orientation-ideal for protecting AC-coupled or floating signal paths where polarity is undefined.
Does SA7.5C-E3/54 meet AEC-Q101 reliability standards?
No, SA7.5C-E3/54 carries the E3 suffix, indicating RoHS-compliant commercial grade. The AEC-Q101 qualified version is SA7.5C-HE3/54 (HE3 suffix). Both share identical electrical specs and DO-204AC packaging, but only the HE3 variant undergoes full automotive stress testing per AEC-Q101.
What is the maximum clamping voltage of SA7.5C-E3/54 under surge conditions?
The SA7.5C-E3/54 has a maximum clamping voltage (VC) of 12.9 V when subjected to its rated peak pulse current of 38.8 A using the standard 10/1000 μs waveform. This value is guaranteed per Vishay document 88378 and defines the upper voltage limit imposed on protected circuitry during transient events.
Can SA7.5C-E3/54 be used in place of SA7.5A in a design?
No-SA7.5C-E3/54 is bi-directional while SA7.5A is uni-directional. Substituting them requires verifying circuit topology: SA7.5A must be oriented with cathode toward the protected line and ground, whereas SA7.5C-E3/54 has no polarity. Using SA7.5C-E3/54 in a uni-directional layout may cause unintended conduction in forward bias if DC bias exceeds ~0.7 V.
What is the thermal derating behavior of SA7.5C-E3/54 above 25 °C ambient?
SA7.5C-E3/54 follows Vishay's standard derating curve (Fig. 2 in doc 88378): peak pulse power remains at 100% up to 25 °C, then linearly decreases to ~50% at 125 °C ambient, and reaches zero at 175 °C junction temperature. Steady-state power dissipation drops from 3.0 W at 75 °C lead temperature per Fig. 5, with full derating above that point.
SA7.5C-E3/54 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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 7.5V
- Voltage - Breakdown (Min):
- 8.33V
- Voltage - Clamping (Max) @ Ipp:
- 14.3V
- Current - Peak Pulse (10/1000µs):
- 35A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
SA7.5C-E3/54 FAQ
1.How can I place an order for SA7.5C-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA7.5C-E3/54 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 SA7.5C-E3/54 reliable?
The price and inventory of SA7.5C-E3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA7.5C-E3/54 is usually 5 days.
3.What payment methods are accepted for SA7.5C-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA7.5C-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA7.5C-E3/54?
SA7.5C-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA7.5C-E3/54 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 SA7.5C-E3/54?
For technical support, including SA7.5C-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA7.5C-E3/54 requirements.
6.How does Aetrix verify that SA7.5C-E3/54 is sourced from the original manufacturer or authorized distributors?
All SA7.5C-E3/54 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 SA7.5C-E3/54 meets industry standards.
7.What is the process for return or replacement of SA7.5C-E3/54?
All SA7.5C-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA7.5C-E3/54, 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 SA7.5C-E3/54 part is unused and in its original packaging.
Return procedure for SA7.5C-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA7.5C-E3/54 Tags
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