My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SA45CA-E3/54
- Part No.:
- SA45CA-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA45CA-E3/54.pdf
- Description:
- TVS DIODE 45VWM 72.7VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,107
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SA45CA-E3/54 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 500 W peak pulse power (10/1000 μs), 45 V stand-off voltage (VWM), 50.0–55.3 V breakdown voltage (VBR at 1.0 mA), 6.9 A peak pulse current (IPPM), and clamps to ≤72.7 V at rated surge. It protects MOSFETs and sensor signal lines in automotive ECUs.
For engineers reviewing the SA45CA-E3/54 datasheet, SA45CA-E3/54 pinout, SA45CA-E3/54 application, or SA45CA-E3/54 equivalent, this page delivers verified electrical parameters, DO-15 terminal mapping, AEC-Q101 qualification status, bidirectional clamping behavior, and direct alternatives for ESD/lightning surge protection in 12 V/24 V systems.
Technical Context
The SA45CA-E3/54 operates as a symmetrical avalanche diode with identical forward and reverse breakdown characteristics, enabling bidirectional transient suppression without polarity dependency. Its glass-passivated junction ensures stable VBR tolerance (±5 %) and low leakage (<1.0 μA at 45 V) across -55 °C to +175 °C operating range.
It delivers 500 W peak pulse power under standardized 10/1000 μs waveform with 0.01 % duty cycle, and exhibits low incremental clamping resistance-VC − VBR = 22.7 V at IPPM, confirming effective energy diversion during fast transients like ISO 7637-2 pulse 1/2a/5a.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 45 V - Maximum continuous reverse voltage before clamping begins; sets operating margin for 12 V/24 V bus protection. |
| VBR (min/max) | 50.0 V / 55.3 V at 1.0 mA - Confirmed avalanche threshold range; ensures reliable turn-on before downstream IC damage. |
| IPPM | 6.9 A - Peak surge current it safely shunts at 10/1000 μs; defines minimum series impedance needed for compliance. |
| VC | ≤72.7 V - Clamped voltage at IPPM; must stay below absolute max rating of protected device (e.g., MCU I/O). |
| PPPM | 500 W - Surge energy handling capacity; validates suitability for automotive load-dump and inductive switching events. |
| TJ max | +175 °C - Junction temperature limit; supports under-hood placement in engine control modules. |
| AEC-Q101 | Qualified - Meets stress test requirements for automotive electronics; enables use in ASIL-B systems without requalification. |
Pinout & Package
Package: DO-15 (DO-204AC), axial-leaded, epoxy-molded case with matte tin-plated leads. No polarity marking-bidirectional operation eliminates cathode/anode distinction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/End 1 | Transient current entry point (either direction) | Connects to line under protection; no fixed polarity-functions identically as input or output terminal. |
| Cathode/End 2 | Transient current exit point (either direction) | Connects to ground or return path; symmetric structure ensures equal clamping in both directions. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables ±5 % VBR tolerance and <1.0 μA leakage at VWM, critical for low-power sensor interfaces. |
| 500 W peak pulse power (10/1000 μs) | Withstands ISO 7637-2 Pulse 5a (load dump) up to 120 V/50 ms when combined with appropriate series impedance. |
| AEC-Q101 qualified | Validated for automotive under-hood applications including engine control, body electronics, and ADAS sensor hubs. |
| DO-15 mechanical robustness | Meets JESD 22-B106 (275 °C solder dip, 10 s) and JESD 201 Class 1A whisker resistance-ensures reliability in wave-soldered assemblies. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial CAN Bus Node |
|---|---|
Use Scenario: Protects microcontroller I/O and driver outputs from load-dump transients induced by alternator regulation failure. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between 12 V supply rail and ground, responding within <1 ns to suppress spikes above 45 V. Use Value: Limits voltage seen by MCU and gate drivers to ≤72.7 V, preventing latch-up or oxide breakdown during 120 V/50 ms load dump events. | Use Scenario: Shields CAN transceiver inputs (CANH/CANL) from ESD and inductive switching noise on factory-floor machinery. IC Role / Device Role / Timing Role: Low-capacitance (≈100 pF) TVS connected across differential pair, clamping common-mode surges without distorting 1 Mbps CAN signaling. Use Value: Maintains signal integrity while absorbing ±8 kV contact ESD per IEC 61000-4-2, thanks to sub-1 ns response and matched bidirectional VBR. |
| Consumer Appliance Motor Drive | Telecom Power Supply Input |
Use Scenario: Guards BLDC motor driver ICs against back-EMF spikes generated during commutation in washing machine or HVAC fans. IC Role / Device Role / Timing Role: Placed across H-bridge high-side and low-side supply rails, conducting only during overvoltage events >45 V. Use Value: Prevents destructive voltage overshoot (>100 V) on gate drivers by diverting 6.9 A surge current within nanoseconds, extending system MTBF. | Use Scenario: Front-end protection for AC/DC adapter input stage against lightning-induced surges on telecom central office power feeds. IC Role / Device Role / Timing Role: First-line defense in series with MOV-based primary protection, clamping fast-rising transients before they reach rectifier bridge. Use Value: Adds precise 45 V clamping threshold and 500 W surge rating to complement slower-acting MOVs, improving coordination in multi-stage protection schemes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ45CA | Same VWM/VBR specs but in SMA (DO-214AC) surface-mount package; 400 W PPPM rating. | Requires PCB re-layout for SMT assembly; lower surge rating limits use in high-energy automotive load-dump scenarios. | Select SMAJ45CA only if space-constrained designs prioritize SMT over through-hole and surge demands are ≤400 W. |
| 1.5KE45CA | Same DO-15 package and 45 V rating, but higher 1500 W PPPM; larger junction area increases capacitance (~200 pF) and thermal mass. | Better for high-energy transients (e.g., ISO 16750-2 long-duration surges), but higher CJ may degrade high-speed signal integrity. | Choose 1.5KE45CA where surge energy exceeds 500 W and signal bandwidth is <1 MHz-avoid for CAN or USB lines. |
Compared with SMAJ45CA and 1.5KE45CA, the SA45CA-E3/54 balances 500 W surge capability, DO-15 through-hole compatibility, and low 100 pF capacitance-making it optimal for cost-sensitive, medium-energy automotive and industrial signal-line protection where layout flexibility and EMI performance matter.
Availability
SA45CA-E3/54 is available at Aetrix Electronics and suitable for automotive engine control units, industrial CAN nodes, and consumer appliance motor drives requiring stable component supply with AEC-Q101 assurance and DO-15 through-hole compatibility.
Supply support for SA45CA-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 TVS devices with emphasis on reliability, automotive qualification, and power efficiency.
The SAxxCA family is engineered for robust transient suppression in harsh environments-designed specifically for automotive, industrial, and telecom applications demanding AEC-Q101 compliance, high surge immunity, and stable parametric performance over temperature.
FAQ
What is the exact breakdown voltage range for SA45CA-E3/54?
The SA45CA-E3/54 has a guaranteed breakdown voltage (VBR) range of 50.0 V to 55.3 V at 1.0 mA test current, per Vishay Document Number 88378. This ±5.3 V window ensures consistent clamping onset across production lots and supports design margining for 45 V nominal systems. The SA45CA-E3/54 maintains this specification across its full operating temperature range.
Is SA45CA-E3/54 suitable for automotive applications?
Yes, SA45CA-E3/54 is AEC-Q101 qualified per the Vishay datasheet, confirming it meets stress testing requirements for automotive electronics-including temperature cycling, humidity bias, and surge endurance. Its DO-15 package, 175 °C max junction temperature, and 500 W surge rating make SA45CA-E3/54 appropriate for engine control, body control modules, and ADAS sensor interfaces.
Does SA45CA-E3/54 have polarity markings?
No, SA45CA-E3/54 has no polarity marking because it is a bidirectional TVS diode-the device functions identically regardless of voltage polarity applied across its terminals. Unlike unidirectional types (e.g., SA45A), the CA suffix indicates symmetrical avalanche behavior, eliminating need for cathode band identification during board assembly.
What is the maximum clamping voltage of SA45CA-E3/54 at rated surge current?
The SA45CA-E3/54 clamps to a maximum of 72.7 V at its rated peak pulse current (IPPM) of 6.9 A under 10/1000 μs waveform conditions. This value-measured as VC-represents the worst-case voltage imposed on protected circuitry during surge events and is critical for verifying compatibility with downstream IC absolute maximum ratings.
Can SA45CA-E3/54 replace SA45A in existing designs?
No-SA45CA-E3/54 is bidirectional while SA45A is unidirectional; substituting them requires verifying circuit topology. SA45A conducts only in reverse bias and blocks forward current, whereas SA45CA-E3/54 clamps in both directions. Using SA45CA-E3/54 in place of SA45A on DC-biased lines may cause unintended conduction; always validate bias conditions and clamping symmetry before replacement.
SA45CA-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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 45V
- Voltage - Breakdown (Min):
- 50V
- Voltage - Clamping (Max) @ Ipp:
- 72.7V
- Current - Peak Pulse (10/1000µs):
- 6.9A
- 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)
SA45CA-E3/54 FAQ
1.How can I place an order for SA45CA-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA45CA-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 SA45CA-E3/54 reliable?
The price and inventory of SA45CA-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 SA45CA-E3/54 is usually 5 days.
3.What payment methods are accepted for SA45CA-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA45CA-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA45CA-E3/54?
SA45CA-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA45CA-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 SA45CA-E3/54?
For technical support, including SA45CA-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA45CA-E3/54 requirements.
6.How does Aetrix verify that SA45CA-E3/54 is sourced from the original manufacturer or authorized distributors?
All SA45CA-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 SA45CA-E3/54 meets industry standards.
7.What is the process for return or replacement of SA45CA-E3/54?
All SA45CA-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA45CA-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 SA45CA-E3/54 part is unused and in its original packaging.
Return procedure for SA45CA-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA45CA-E3/54 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
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
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 …
