5.0SMDJ75CA — AMSEMI 5000 W 75 V Bidirectional TVS (DO-214AB)
Intek Technology (INTEK, www.intek.vip) is an authorized distributor of AMSEMI (Anhui Anmei Semiconductor Co., Ltd) and is responsible for supply and selection support across the entire AMSEMI product line.
One-line takeaway: 5.0SMDJ75CA is a 5000 W bidirectional TVS in DO-214AB (SMC) with a 75 V stand-off voltage, clamping at 121.0 V at 41.4 A on the 10/1000 µs waveform, AEC-Q101 qualified. It is the standard grade for 16S NMC and 19S LFP battery packs whose full-charge voltage sits at 67-70 V.
1. What this part is
5.0SMDJ75CA comes from the AMSEMI 5.0SMDJ family. The part number reads as: 5.0 = 5000 W peak pulse power class, SMDJ = surface-mount TVS in SMC, 75 = VRWM 75 V grade, C = bidirectional (A would be unidirectional). A bidirectional part clamps in both directions, which suits differential lines, AC signals and protection points where polarity is not fixed.
Body marking: 5PGR (unidirectional) / 5BGR (bidirectional) per the datasheet part-number table — use it to check incoming reels for mixed parts.
Its position: 5000 W surge capability, 75 V grade, bidirectional, automotive qualified. It is the grade most often chosen for battery packs that reach 67-70 V at full charge — enough VRWM headroom, without pushing the clamping voltage above the downstream MOSFET rating.
2. Key parameters
2.1 Electrical characteristics (Ta = 25 °C, 10/1000 µs waveform)
| Parameter | Symbol | Value | Note |
|---|---|---|---|
| Reverse stand-off voltage | VRWM | 75 V | — |
| Breakdown voltage (min / max) | VBR | 83.30 V / 92.10 V | at IT = 1 mA |
| Peak clamping voltage | Vc | 121.0 V | at Ipp = 41.4 A |
| Peak pulse current | Ipp | 41.4 A | 10/1000 µs |
| Maximum reverse leakage | IR | 5 µA | at VRWM |
| Peak pulse power | PDPM | 5000 W | 10/1000 µs |
2.2 Ratings and features
| Item | Value | Note |
|---|---|---|
| Package | DO-214AB (SMC) | Surface mount |
| Direction | Bidirectional (CA) | Clamps in both polarities |
| Automotive qualification | AEC-Q101 | — |
| Peak forward surge | IFSM 300 A (unidirectional) | 8.3 ms half sine |
| Junction temperature | -55 to +150 °C | — |
| ESD | IEC 61000-4-2, ±30 kV | Contact / air discharge |
The waveform has to be stated explicitly: every Vc and Ipp above is on the 10/1000 µs waveform from the AMSEMI datasheet (Document 8060014). That datasheet contains no 8/20 µs data at all. If you quote an 8/20 µs figure, label it as another vendor's published data — never as an AMSEMI datasheet value.
3. Standard grade vs foldback grade (5.0SMDJ75CA-N)
AMSEMI offers the 75 V grade in two versions with identical VRWM, VBR window and Ipp: the standard 5.0SMDJ75CA and the shallow-foldback 5.0SMDJ75CA-N (also called snap-back TVS).
| Item | 5.0SMDJ75CA (standard) | 5.0SMDJ75CA-N (foldback) | Delta |
|---|---|---|---|
| VRWM | 75 V | 75 V | same |
| VBR at 1 mA | 83.3 – 92.1 V | 83.3 – 92.1 V | same |
| Ipp (10/1000 µs) | 41.4 A | 41.4 A | same |
| Vc at Ipp | 121.0 V | 96.8 V | -24.2 V (-20.0%) |
| Body marking | 5BGR | 5NGR | — |
| Package | DO-214AB | DO-214AB | same, drop-in |
What those 24.2 V buy you, on a 16S NMC pack (67.2 V full charge): the standard part clamps at 121.0 V, so the main-circuit MOSFET has to be a 110/120 V device; the foldback part clamps at 96.8 V, which lets the same board run a 100 V MOSFET. Going from 120 V to 100 V usually means a lower RDS(on) at the same die area, so the gain shows up as less heat rather than a cheaper part.
The reverse also holds: if your BOM already commits to a 100 V MOSFET, the standard 5.0SMDJ75CA at 121.0 V sits above it and the foldback part is not optional.
Drop-in note: same package, same 5000 W class, same VRWM / VBR / Ipp — no layout or pad change, just a part-number swap and a repeat surge validation.
One figure still open with the factory: the 8060055 cover sheet states 5000 W peak pulse power for the whole -N family, but Vc × Ipp gives 96.8 V × 41.4 A ≈ 4008 W for the 75 V foldback grade, while the standard grade computes to 5009 W. We publish the datasheet's 5000 W headline and flag the arithmetic gap rather than quietly quoting either number.
4. Package and ordering information
| Item | Content |
|---|---|
| Ordering code | 5.0SMDJ75CA (bidirectional) / 5.0SMDJ75A (unidirectional) |
| Package | DO-214AB (SMC), surface mount, body approx. 7.9 × 5.9 × 3.1 mm |
| Packing | 13-inch reel, 3000 pcs per inner box |
| Temperature range | -55 to +150 °C |
| Qualification | AEC-Q101 (automotive), RoHS, halogen-free |
| Brand | Anhui Anmei Semiconductor (AMSEMI) |
Cross-brand equivalents:
5.0SMDJ75CAis an industry-wide part number, and Littelfuse, Bourns, Eaton and YAGEO list parts under the same name. Same name does not mean same parameters — the VBR window, the waveform behind Vc, and the Ipp definition all differ between vendors, and Vc in particular moves a lot between 10/1000 µs and 8/20 µs. Check three things before substituting: VRWM, VBR window, and Vc together with the Ipp waveform it was measured on.
5. Typical applications
The datasheet lists transient voltage protection of sensitive electronics — inductive load switching, lightning and surge events on ICs, MOSFETs and sensor signal lines. With a 75 V grade the practical fits are:
BMS main circuit (per AMSEMI's recommended-model table for battery packs)
| Pack configuration (75 V grade) | Full-charge voltage | Vc: standard / foldback |
|---|---|---|
| 16S NMC | 67.2 V | 121 V / 96.8 V |
| 19S LFP | 69.35 V | 121 V / 96.8 V |
Other rails
- 48 V bus load dump and inductive-switching protection — telecom power, industrial equipment power entries
- Power input of 60 V-class e-bike and e-scooter controllers (67-70 V at full charge)
- Auxiliary supply and communication-port surge protection on energy-storage inverters
- 24 V automotive load dump (the part is AEC-Q101 qualified)
6. Stock and supply
| Item | Content |
|---|---|
| Quantity in stock | 18,000 pcs (counted 2026-09-28) |
| Brand | AMSEMI (Anhui Anmei) |
| Package / packing | DO-214AB (SMC) / 13-inch reel |
| Supply mode | Samples, low volume (broken reels), volume |
| Enquiry | Tel / WeChat 136-3264-8484 |
| Foldback version | 5.0SMDJ75CA-N quoted on request |
Stock moves. The figure above is a snapshot taken on 2026-09-28 — confirm live availability when you enquire. This page is updated or retired when a part is cleared out or re-scheduled.
FAQ
Q1. What is the difference between 5.0SMDJ75CA and 5.0SMDJ75CA-N?
Same VRWM 75 V, same VBR window 83.3-92.1 V at 1 mA, same Ipp 41.4 A on the 10/1000 us waveform, same DO-214AB package. The only difference is peak clamping voltage: 121.0 V for the standard part versus 96.8 V for the foldback -N part, 20.0% lower. It is a drop-in swap with no layout change, and it lets the main-circuit MOSFET drop from the 110/120 V class to the 100 V class.
Q2. Which 5.0SMDJ grade fits a 16S or 19S battery pack?
Work back from the full-charge voltage: VRWM must be at least 1.1 times the highest bus voltage, and Vc must stay below the downstream MOSFET VDS rating. A 16S NMC pack at 67.2 V and a 19S LFP pack at 69.35 V both land on the 75 V grade, 5.0SMDJ75CA.
Q3. Can another brand 5.0SMDJ75CA be used as a substitute?
5.0SMDJ75CA is an industry-standard name and Littelfuse, Bourns, Eaton and YAGEO all sell parts under it, but the same name does not guarantee the same numbers. Check three items before substituting: VRWM, the VBR window, and Vc together with the test waveform it was measured on (10/1000 us versus 8/20 us), because Vc differs a lot between the two waveforms. INTEK can provide a three-item comparison against the main brands for the same grade.
Q4. What is the stock position and can I get samples?
18,000 pcs in stock as of the 2026-09-28 count. Samples, low volume and volume orders are all supported - call or WeChat 136-3264-8484.
Contact us
Tell us the rail voltage, the surge test level and the waveform, and we will match the grade against the actual clamping curve and send samples for validation. Contact us.
Shenzhen Intek Technology Co., Ltd — electronic components distributor and system solutions provider Tel / WeChat: 136-3264-8484 Address: 4F, Building 2, Jingwei Center, No. 309 Pingan Avenue, Pinghu Street, Longgang District, Shenzhen, China Web: www.intek.vip
Disclaimer: this page is technical information for engineers. All parameters are quoted from the manufacturer datasheet and are subject to change. Always verify against the current datasheet of the exact part you intend to buy, and validate with surge testing on your own board. Nothing here constitutes a procurement or design-warranty commitment.