ACEFC304-HF Equivalent & Substitute Parts Reference

Part Overview

The ACEFC304-HF is a general-purpose rectifier diode manufactured by Comchip Technology, rated for 200 V DC reverse voltage and 3 A average rectified current in a surface mount DO-214AB (SMC) package. This component is classified as Active product status with AEC-Q101 automotive qualification and ROHS3 compliance. Substitute parts are identified based on matching electrical specifications (voltage, current, recovery characteristics) and mechanical compatibility (package type, mounting method) to ensure direct functional replacement in circuit applications.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) Max	200	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) Max @ If	900 mV @ 3 A	mV @ A
Speed Classification	Fast Recovery ≤ 500ns, > 200mA	—
Reverse Recovery Time (trr)	20	ns
Current - Reverse Leakage @ Vr	10 µA @ 200 V	µA @ V
Package / Case	DO-214AB, SMC	—
Operating Temperature - Junction	-55 to 150	°C
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Grade	Automotive	—
Qualification	AEC-Q101	—

Substitute Part Grouping Explanation

Substitute parts for the ACEFC304-HF are qualified based on the following electrical and mechanical criteria:

Primary Matching Criteria:

Voltage - DC Reverse (Vr) Max: 200 V (exact match required)
Current - Average Rectified (Io): 3 A (exact match required)
Package / Case: DO-214AB or DO-214AA (SMC or SMB variants acceptable for form-factor compatibility)
Mounting Type: Surface Mount (required)
Speed Classification: Fast Recovery ≤ 500ns, > 200mA (preferred for performance equivalence)
RoHS Status: ROHS3 Compliant (required for regulatory alignment)

Secondary Compatibility Parameters:

Voltage - Forward (Vf) Max @ If: Range 875 mV to 1.3 V @ 2.5–3 A (acceptable variance)
Reverse Recovery Time (trr): 20–150 ns (acceptable range for fast recovery classification)
Current - Reverse Leakage @ Vr: 5–10 µA @ 200 V (acceptable range)
Operating Temperature - Junction: -55°C to -65°C minimum; 150°C to 175°C maximum (acceptable variance)

Substitute parts meeting all primary criteria and within secondary parameter ranges are electrically and mechanically compatible with the ACEFC304-HF for direct circuit replacement.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) V	Io (A)	Vf (Max) @ If	Speed	trr (ns)	Ir @ Vr (µA)	Package	Tj (°C)	RoHS
ACEFC304-HF	Comchip Technology	200	3	900 mV @ 3 A	Fast ≤ 500ns	20	10 @ 200 V	DO-214AB (SMC)	-55 to 150	ROHS3
CMR3-02 TR13 PBFREE	Central Semiconductor Corp	200	3	1.2 V @ 3 A	Standard >500ns	—	5 @ 200 V	DO-214AB (SMC)	-65 to 175	ROHS3
CMR3U-02 TR13 PBFREE	Central Semiconductor Corp	200	3	1.0 V @ 3 A	Fast ≤ 500ns	50	5 @ 200 V	DO-214AB (SMC)	-65 to 175	ROHS3
ER3D-TP	Micro Commercial Co	200	3	950 mV @ 3 A	Fast ≤ 500ns	35	5 @ 200 V	DO-214AB (SMC)	-50 to 175	ROHS3
ES3DB-13-F	Diodes Incorporated	200	3	900 mV @ 3 A	Fast ≤ 500ns	25	10 @ 200 V	DO-214AA (SMB)	-55 to 150	ROHS3
MURS320-13-F	Diodes Incorporated	200	3	875 mV @ 3 A	Fast ≤ 500ns	25	5 @ 200 V	DO-214AB (SMC)	-65 to 175	ROHS3
MURS320-E3/57T	Vishay General Semiconductor	200	3	875 mV @ 3 A	Fast ≤ 500ns	35	5 @ 200 V	DO-214AB (SMC)	-65 to 175	ROHS3
MURS320-E3/9AT	Vishay General Semiconductor	200	3	875 mV @ 3 A	Fast ≤ 500ns	35	5 @ 200 V	DO-214AB (SMC)	-65 to 175	ROHS3
RS3D-13-F	Diodes Incorporated	200	3	1.3 V @ 3 A	Fast ≤ 500ns	150	5 @ 200 V	DO-214AB (SMC)	-65 to 150	ROHS3
RS3D-E3/57T	Vishay General Semiconductor	200	3	1.3 V @ 2.5 A	Fast ≤ 500ns	150	10 @ 200 V	DO-214AB (SMC)	-55 to 150	ROHS3
S3D-13-F	Diodes Incorporated	200	3	1.15 V @ 3 A	Standard >500ns	—	10 @ 200 V	DO-214AB (SMC)	-65 to 150	ROHS3

Engineering Selection Recommendations

Direct Electrical Equivalents (Highest Compatibility):

MURS320-13-F, MURS320-E3/57T, and MURS320-E3/9AT from Diodes Incorporated and Vishay General Semiconductor provide the closest electrical match to ACEFC304-HF. These parts maintain 200 V reverse voltage, 3 A rectified current, fast recovery characteristics (≤ 500ns, trr 25–35 ns), and DO-214AB (SMC) package compatibility. Forward voltage is lower (875 mV vs. 900 mV), resulting in reduced power dissipation. All are ROHS3 compliant with extended operating temperature ranges (-65°C to 175°C).

Fast Recovery Alternatives with Package Variance:

ES3DB-13-F from Diodes Incorporated matches electrical specifications identically (200 V, 3 A, 900 mV Vf, 25 ns trr, fast recovery) but uses DO-214AA (SMB) package instead of DO-214AB (SMC). This part is suitable for applications where SMB footprint compatibility exists. Reverse leakage and capacitance characteristics are equivalent to the main part.

Extended Temperature Range Options:

CMR3U-02 TR13 PBFREE from Central Semiconductor Corp provides fast recovery performance (≤ 500ns, 50 ns trr) with extended junction temperature range (-65°C to 175°C) and lower forward voltage (1.0 V @ 3 A). This part is recommended for applications requiring wider thermal operating margins.

Standard Recovery Alternative:

S3D-13-F from Diodes Incorporated meets voltage and current specifications but operates with standard recovery characteristics (>500ns). This part is suitable only for applications where fast recovery is not a circuit requirement. Extended temperature range (-65°C to 150°C) and high inventory availability (295,099 pcs) support supply chain continuity.

Compliance and Qualification:

All substitute parts maintain ROHS3 compliance. The main part ACEFC304-HF carries AEC-Q101 automotive qualification; substitute parts do not explicitly list automotive qualification in provided data. For automotive applications requiring AEC-Q101 certification, ACEFC304-HF remains the specified choice.

Frequently Asked Questions (FAQ)

Q1: Can MURS320-13-F directly replace ACEFC304-HF in all applications?

MURS320-13-F meets all primary electrical and mechanical criteria: 200 V reverse voltage, 3 A rectified current, fast recovery (≤ 500ns, 25 ns trr), and DO-214AB (SMC) package. Forward voltage is 875 mV versus 900 mV, resulting in lower power dissipation. Direct substitution is electrically valid. However, if AEC-Q101 automotive qualification is a circuit requirement, ACEFC304-HF must be retained, as MURS320-13-F does not list this certification in provided specifications.

Q2: What is the difference between DO-214AB (SMC) and DO-214AA (SMB) packages?

DO-214AB (SMC) and DO-214AA (SMB) are distinct surface mount package outlines with different footprint dimensions. ES3DB-13-F uses DO-214AA (SMB), while ACEFC304-HF uses DO-214AB (SMC). These packages are not mechanically interchangeable on the same PCB layout. Substitution with ES3DB-13-F requires PCB footprint redesign or use of adapter patterns.

Q3: Why do some substitute parts show higher forward voltage (1.2–1.3 V) than the main part (900 mV)?

Forward voltage variation within the 875–1.3 mV range reflects manufacturing process differences across suppliers and diode speed classifications. CMR3-02 (1.2 V, standard recovery) and RS3D-13-F (1.3 V, fast recovery with 150 ns trr) operate within acceptable electrical limits but dissipate more power than ACEFC304-HF. Selection depends on thermal design margins and circuit efficiency requirements.

Q4: What does "Fast Recovery ≤ 500ns, > 200mA" mean?

This specification indicates the diode exhibits fast recovery characteristics when reverse current exceeds 200 mA. Reverse recovery time (trr) is the interval required for the diode to transition from forward conduction to reverse blocking state. Fast recovery (≤ 500ns) minimizes switching losses in high-frequency rectification circuits. Standard recovery (>500ns) is suitable for lower-frequency applications.

Q5: Can I use S3D-13-F as a substitute if cost is the primary concern?

S3D-13-F is electrically compatible (200 V, 3 A, DO-214AB SMC) and has the highest inventory availability (295,099 pcs), supporting cost optimization. However, this part operates with standard recovery characteristics (>500ns) versus fast recovery (≤ 500ns) for ACEFC304-HF. Substitution is valid only if the circuit does not require fast recovery performance. Forward voltage is higher (1.15 V vs. 900 mV), increasing power dissipation by approximately 28%.

Q6: Are all substitute parts ROHS3 compliant?

Yes. All substitute parts listed carry ROHS3 compliance status, matching the main part ACEFC304-HF. This ensures regulatory alignment for applications subject to RoHS directives.

Q7: What is the significance of reverse leakage current (Ir) variation (5–10 µA @ 200 V)?

Reverse leakage current represents the small current flowing through the diode in reverse bias condition. Lower leakage (5 µA) reduces standby power consumption and heat generation. ACEFC304-HF and ES3DB-13-F specify 10 µA, while most substitute parts specify 5 µA. This difference is negligible in most applications but becomes significant in high-impedance or low-power circuits.

Q8: Which substitute part offers the best performance match to ACEFC304-HF?

ER3D-TP from Micro Commercial Co provides the closest performance match: 200 V, 3 A, 950 mV forward voltage (within 50 mV of main part), fast recovery (≤ 500ns, 35 ns trr), and DO-214AB (SMC) package. This part is recommended for direct substitution when AEC-Q101 qualification is not required and performance equivalence is prioritized.

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